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rust/CHANGELOG.md
Quinn Sinclair 70024e16c0 New Lint: [thread_local_initializer_can_be_made_const] 
Adds a new lint to suggest using `const` on `thread_local!`
initializers that can be evaluated at compile time.

Impl details:

The lint relies on the expansion of `thread_local!`. For non
const-labelled initializers, `thread_local!` produces a function
called `__init` that lazily initializes the value. We check the function
and decide whether the body can be const. The body of the function is
exactly the initializer. If so, we lint the body.

changelog: new lint [`thread_local_initializer_can_be_made_const`]
2024-01-01 18:06:10 +02:00

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# Changelog
All notable changes to this project will be documented in this file.
See [Changelog Update](book/src/development/infrastructure/changelog_update.md) if you want to update this
document.
## Unreleased / Beta / In Rust Nightly
[09ac14c9...master](https://github.com/rust-lang/rust-clippy/compare/09ac14c9...master)
## Rust 1.75
Current stable, released 2023-12-28
[View all 69 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2023-09-25T11%3A47%3A47Z..2023-11-02T16%3A41%3A59Z+base%3Amaster)
### New Lints
* [`unused_enumerate_index`]
[#10404](https://github.com/rust-lang/rust-clippy/pull/10404)
* [`unnecessary_fallible_conversions`]
[#11669](https://github.com/rust-lang/rust-clippy/pull/11669)
* [`waker_clone_wake`]
[#11698](https://github.com/rust-lang/rust-clippy/pull/11698)
* [`struct_field_names`]
[#11496](https://github.com/rust-lang/rust-clippy/pull/11496)
* [`into_iter_without_iter`]
[#11587](https://github.com/rust-lang/rust-clippy/pull/11587)
* [`iter_without_into_iter`]
[#11527](https://github.com/rust-lang/rust-clippy/pull/11527)
* [`manual_hash_one`]
[#11556](https://github.com/rust-lang/rust-clippy/pull/11556)
### Moves and Deprecations
* Moved [`read_zero_byte_vec`] to `nursery` (Now allow-by-default)
[#11727](https://github.com/rust-lang/rust-clippy/pull/11727)
* Moved [`missing_enforced_import_renames`] to `style` (Now warn-by-default)
[#11539](https://github.com/rust-lang/rust-clippy/pull/11539)
* Moved [`needless_raw_string_hashes`] to `pedantic` (Now allow-by-default)
[#11415](https://github.com/rust-lang/rust-clippy/pull/11415)
* Moved [`needless_pass_by_ref_mut`] to `nursery` (Now allow-by-default)
[#11596](https://github.com/rust-lang/rust-clippy/pull/11596)
### Enhancements
* [`declare_interior_mutable_const`] and [`borrow_interior_mutable_const`]: Now check the
[`ignore-interior-mutability`] config value
[#11678](https://github.com/rust-lang/rust-clippy/pull/11678)
### Suggestion Fixes/Improvements
* [`items_after_test_module`]: The suggestion is now machine-applicable
[#11611](https://github.com/rust-lang/rust-clippy/pull/11611)
### ICE Fixes
* [`redundant_locals`]: No longer crashes if variables are rebound above macros
[#11623](https://github.com/rust-lang/rust-clippy/pull/11623)
* [`implicit_hasher`]: No longer lints inside macros, which could cause ICEs
[#11593](https://github.com/rust-lang/rust-clippy/pull/11593)
### Documentation Improvements
* `cargo clippy --help` now uses colors for readability :tada:
## Rust 1.74
Released 2023-11-16
[View all 94 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2023-08-11T15%3A29%3A18Z..2023-09-25T08%3A48%3A22Z+base%3Amaster)
### New Lints
* [`redundant_as_str`]
[#11526](https://github.com/rust-lang/rust-clippy/pull/11526)
* [`needless_borrows_for_generic_args`]
[#11511](https://github.com/rust-lang/rust-clippy/pull/11511)
* [`path_ends_with_ext`]
[#11483](https://github.com/rust-lang/rust-clippy/pull/11483)
* [`unnecessary_map_on_constructor`]
[#11413](https://github.com/rust-lang/rust-clippy/pull/11413)
* [`missing_asserts_for_indexing`]
[#10692](https://github.com/rust-lang/rust-clippy/pull/10692)
* [`iter_out_of_bounds`]
[#11396](https://github.com/rust-lang/rust-clippy/pull/11396)
* [`implied_bounds_in_impls`]
[#11362](https://github.com/rust-lang/rust-clippy/pull/11362)
* [`reserve_after_initialization`]
[#11373](https://github.com/rust-lang/rust-clippy/pull/11373)
* [`should_panic_without_expect`]
[#11204](https://github.com/rust-lang/rust-clippy/pull/11204)
### Moves and Deprecations
* Renamed `incorrect_clone_impl_on_copy_type` to [`non_canonical_clone_impl`]
[#11358](https://github.com/rust-lang/rust-clippy/pull/11358)
* Renamed `incorrect_partial_ord_impl_on_ord_type` to [`non_canonical_partial_ord_impl`]
[#11358](https://github.com/rust-lang/rust-clippy/pull/11358)
* Moved [`non_canonical_clone_impl`] to `suspicious` (Now warn-by-default)
[#11358](https://github.com/rust-lang/rust-clippy/pull/11358)
* Moved [`non_canonical_partial_ord_impl`] to `suspicious` (Now warn-by-default)
[#11358](https://github.com/rust-lang/rust-clippy/pull/11358)
* Moved [`needless_pass_by_ref_mut`] to `nursery` (Now allow-by-default)
[#11596](https://github.com/rust-lang/rust-clippy/pull/11596)
### Enhancements
* [`undocumented_unsafe_blocks`]: The config values [`accept-comment-above-statement`] and
[`accept-comment-above-attributes`] are now `true` by default
[#11170](https://github.com/rust-lang/rust-clippy/pull/11170)
* [`explicit_iter_loop`]: Added [`enforce-iter-loop-reborrow`] to disable reborrow linting by default
[#11418](https://github.com/rust-lang/rust-clippy/pull/11418)
### ICE Fixes
* [`enum_variant_names`]: No longer crashes if the threshold is 0 and the enum has no variants
[#11552](https://github.com/rust-lang/rust-clippy/pull/11552)
* [`cast_possible_truncation`]: No longer crashes on values larger than `u64::MAX`
[#11517](https://github.com/rust-lang/rust-clippy/pull/11517)
* [`tuple_array_conversions`]: No longer crashes if the array length is not usize
[#11379](https://github.com/rust-lang/rust-clippy/pull/11379)
* [`useless_conversion`]: No longer crashes, when the receiver is a non-fn item
[#11070](https://github.com/rust-lang/rust-clippy/pull/11070)
## Rust 1.73
Released 2023-10-05
[View all 103 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2023-07-02T12%3A24%3A40Z..2023-08-11T11%3A09%3A56Z+base%3Amaster)
### New Lints
* [`impossible_comparisons`]
[#10843](https://github.com/rust-lang/rust-clippy/pull/10843)
* [`redundant_comparisons`]
[#10843](https://github.com/rust-lang/rust-clippy/pull/10843)
* [`ignored_unit_patterns`]
[#11242](https://github.com/rust-lang/rust-clippy/pull/11242)
* [`readonly_write_lock`]
[#11210](https://github.com/rust-lang/rust-clippy/pull/11210)
* [`filter_map_bool_then`]
[#11115](https://github.com/rust-lang/rust-clippy/pull/11115)
* [`needless_return_with_question_mark`]
[#11031](https://github.com/rust-lang/rust-clippy/pull/11031)
* [`redundant_guards`]
[#10955](https://github.com/rust-lang/rust-clippy/pull/10955)
* [`redundant_locals`]
[#10885](https://github.com/rust-lang/rust-clippy/pull/10885)
* [`absolute_paths`]
[#11003](https://github.com/rust-lang/rust-clippy/pull/11003)
* [`error_impl_error`]
[#11107](https://github.com/rust-lang/rust-clippy/pull/11107)
* [`iter_skip_zero`]
[#11046](https://github.com/rust-lang/rust-clippy/pull/11046)
* [`string_lit_chars_any`]
[#11052](https://github.com/rust-lang/rust-clippy/pull/11052)
* [`four_forward_slashes`]
[#11140](https://github.com/rust-lang/rust-clippy/pull/11140)
* [`format_collect`]
[#11116](https://github.com/rust-lang/rust-clippy/pull/11116)
* [`needless_pass_by_ref_mut`]
[#10900](https://github.com/rust-lang/rust-clippy/pull/10900)
* [`manual_is_infinite`]
[#11049](https://github.com/rust-lang/rust-clippy/pull/11049)
* [`manual_is_finite`]
[#11049](https://github.com/rust-lang/rust-clippy/pull/11049)
* [`incorrect_partial_ord_impl_on_ord_type`]
[#10788](https://github.com/rust-lang/rust-clippy/pull/10788)
* [`read_line_without_trim`]
[#10970](https://github.com/rust-lang/rust-clippy/pull/10970)
* [`type_id_on_box`]
[#10987](https://github.com/rust-lang/rust-clippy/pull/10987)
### Moves and Deprecations
* Renamed `unwrap_or_else_default` to [`unwrap_or_default`]
[#10120](https://github.com/rust-lang/rust-clippy/pull/10120)
* Moved [`tuple_array_conversions`] to `pedantic` (Now allow-by-default)
[#11146](https://github.com/rust-lang/rust-clippy/pull/11146)
* Moved [`arc_with_non_send_sync`] to `suspicious` (Now warn-by-default)
[#11104](https://github.com/rust-lang/rust-clippy/pull/11104)
* Moved [`needless_raw_string_hashes`] to `pedantic` (Now allow-by-default)
[#11415](https://github.com/rust-lang/rust-clippy/pull/11415)
### Enhancements
* [`unwrap_used`]: No longer lints on the never-type or never-like enums
[#11252](https://github.com/rust-lang/rust-clippy/pull/11252)
* [`expect_used`]: No longer lints on the never-type or never-like enums
[#11252](https://github.com/rust-lang/rust-clippy/pull/11252)
### False Positive Fixes
* [`panic_in_result_fn`]: No longer triggers on `todo!`, `unimplemented!`, `unreachable!`
[#11123](https://github.com/rust-lang/rust-clippy/pull/11123)
### Suggestion Fixes/Improvements
* [`semicolon_if_nothing_returned`]: The suggestion is now machine-applicable with rustfix
[#11083](https://github.com/rust-lang/rust-clippy/pull/11083)
### ICE Fixes
* [`filter_map_bool_then`]: No longer crashes on late-bound regions
[#11318](https://github.com/rust-lang/rust-clippy/pull/11318)
* [`unwrap_or_default`]: No longer crashes on alias types for local items
[#11258](https://github.com/rust-lang/rust-clippy/pull/11258)
* [`unnecessary_literal_unwrap`]: No longer crashes on `None.unwrap_or_default()`
[#11106](https://github.com/rust-lang/rust-clippy/pull/11106)
* Fixed MIR-related ICE
[#11130](https://github.com/rust-lang/rust-clippy/pull/11130)
* [`missing_fields_in_debug`]: No longer crashes on non-ADT self types
[#11069](https://github.com/rust-lang/rust-clippy/pull/11069)
## Rust 1.72
Released 2023-08-24
[View all 131 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2023-05-22T14%3A53%3A59Z..2023-07-01T22%3A57%3A20Z+base%3Amaster)
### New Lints
* [`manual_try_fold`]
[#11012](https://github.com/rust-lang/rust-clippy/pull/11012)
* [`tuple_array_conversions`]
[#11020](https://github.com/rust-lang/rust-clippy/pull/11020)
* [`redundant_at_rest_pattern`]
[#11013](https://github.com/rust-lang/rust-clippy/pull/11013)
* [`needless_pub_self`]
[#10967](https://github.com/rust-lang/rust-clippy/pull/10967)
* [`pub_with_shorthand`]
[#10967](https://github.com/rust-lang/rust-clippy/pull/10967)
* [`pub_without_shorthand`]
[#10967](https://github.com/rust-lang/rust-clippy/pull/10967)
* [`manual_range_patterns`]
[#10968](https://github.com/rust-lang/rust-clippy/pull/10968)
* [`needless_raw_string_hashes`]
[#10884](https://github.com/rust-lang/rust-clippy/pull/10884)
* [`needless_raw_strings`]
[#10884](https://github.com/rust-lang/rust-clippy/pull/10884)
* [`incorrect_clone_impl_on_copy_type`]
[#10925](https://github.com/rust-lang/rust-clippy/pull/10925)
* [`drain_collect`]
[#10835](https://github.com/rust-lang/rust-clippy/pull/10835)
* [`single_range_in_vec_init`]
[#10934](https://github.com/rust-lang/rust-clippy/pull/10934)
* [`unnecessary_literal_unwrap`]
[#10358](https://github.com/rust-lang/rust-clippy/pull/10358)
* [`large_stack_frames`]
[#10827](https://github.com/rust-lang/rust-clippy/pull/10827)
* [`min_ident_chars`]
[#10916](https://github.com/rust-lang/rust-clippy/pull/10916)
* [`needless_if`]
[#10921](https://github.com/rust-lang/rust-clippy/pull/10921)
* [`excessive_nesting`]
[#10672](https://github.com/rust-lang/rust-clippy/pull/10672)
* [`arc_with_non_send_sync`]
[#10898](https://github.com/rust-lang/rust-clippy/pull/10898)
* [`redundant_type_annotations`]
[#10570](https://github.com/rust-lang/rust-clippy/pull/10570)
* [`host_endian_bytes`]
[#10826](https://github.com/rust-lang/rust-clippy/pull/10826)
* [`little_endian_bytes`]
[#10826](https://github.com/rust-lang/rust-clippy/pull/10826)
* [`big_endian_bytes`]
[#10826](https://github.com/rust-lang/rust-clippy/pull/10826)
* [`ptr_cast_constness`]
[#10779](https://github.com/rust-lang/rust-clippy/pull/10779)
* [`needless_else`]
[#10810](https://github.com/rust-lang/rust-clippy/pull/10810)
### Moves and Deprecations
* Moved [`redundant_clone`] to `nursery` (Now allow-by-default)
[#10873](https://github.com/rust-lang/rust-clippy/pull/10873)
### Enhancements
* [`undocumented_unsafe_blocks`]: Added [`accept-comment-above-attributes`] configuration
[#10986](https://github.com/rust-lang/rust-clippy/pull/10986)
* [`undocumented_unsafe_blocks`]: Added [`accept-comment-above-statement`] configuration.
[#10886](https://github.com/rust-lang/rust-clippy/pull/10886)
* [`missing_panics_doc`]: No longer lints on `todo!()`
[#10976](https://github.com/rust-lang/rust-clippy/pull/10976)
* [`module_inception`]: Added `allow-private-module-inception` configuration.
[#10917](https://github.com/rust-lang/rust-clippy/pull/10917)
* Errors and warnings generated while parsing `clippy.toml` now point to the location in the TOML
file the error/warning occurred in.
[#10607](https://github.com/rust-lang/rust-clippy/pull/10607)
### False Positive Fixes
* [`excessive_precision`]: No longer lints overflowing literals
[#10952](https://github.com/rust-lang/rust-clippy/pull/10952)
### Suggestion Fixes/Improvements
* [`option_map_unwrap_or`]: The suggestion now considers the set [`msrv`] config value
[#11030](https://github.com/rust-lang/rust-clippy/pull/11030)
### Documentation Improvements
* [Clippy's lint list] now stores filter parameters in the URL, to allow easy sharing
[#10834](https://github.com/rust-lang/rust-clippy/pull/10834)
## Rust 1.71
Released 2023-07-13
Note: Clippy will use a shorter changelog format from now on, if you want a detailed list of
all changes, please check out the list of merged pull requests.
[View all 78 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2023-04-11T20%3A05%3A26Z..2023-05-20T13%3A48%3A17Z+base%3Amaster)
### New Lints
* [`non_minimal_cfg`]
[#10763](https://github.com/rust-lang/rust-clippy/pull/10763)
* [`manual_next_back`]
[#10769](https://github.com/rust-lang/rust-clippy/pull/10769)
* [`ref_patterns`]
[#10736](https://github.com/rust-lang/rust-clippy/pull/10736)
* [`default_constructed_unit_structs`]
[#10716](https://github.com/rust-lang/rust-clippy/pull/10716)
* [`manual_while_let_some`]
[#10647](https://github.com/rust-lang/rust-clippy/pull/10647)
* [`needless_bool_assign`]
[#10432](https://github.com/rust-lang/rust-clippy/pull/10432)
* [`items_after_test_module`]
[#10578](https://github.com/rust-lang/rust-clippy/pull/10578)
### Moves and Deprecations
* Rename `integer_arithmetic` to `arithmetic_side_effects`
[#10674](https://github.com/rust-lang/rust-clippy/pull/10674)
* Moved [`redundant_clone`] to `nursery` (Now allow-by-default)
[#10873](https://github.com/rust-lang/rust-clippy/pull/10873)
### Enhancements
* [`invalid_regex`]: Now supports the new syntax introduced after regex v1.8.0
[#10682](https://github.com/rust-lang/rust-clippy/pull/10682)
* [`semicolon_outside_block`]: Added [`semicolon-outside-block-ignore-multiline`] as a new config value.
[#10656](https://github.com/rust-lang/rust-clippy/pull/10656)
* [`semicolon_inside_block`]: Added [`semicolon-inside-block-ignore-singleline`] as a new config value.
[#10656](https://github.com/rust-lang/rust-clippy/pull/10656)
* [`unnecessary_box_returns`]: Added [`unnecessary-box-size`] as a new config value to set the maximum
size of `T` in `Box<T>` to be linted.
[#10651](https://github.com/rust-lang/rust-clippy/pull/10651)
### Documentation Improvements
* `cargo clippy --explain LINT` now shows possible configuration options for the explained lint
[#10751](https://github.com/rust-lang/rust-clippy/pull/10751)
* New config values mentioned in this changelog will now be linked.
[#10889](https://github.com/rust-lang/rust-clippy/pull/10889)
* Several sections of [Clippy's book] have been reworked
[#10652](https://github.com/rust-lang/rust-clippy/pull/10652)
[#10622](https://github.com/rust-lang/rust-clippy/pull/10622)
[Clippy's book]: https://doc.rust-lang.org/clippy/
## Rust 1.70
Released 2023-06-01
[View all 91 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2023-02-26T01%3A05%3A43Z..2023-04-11T13%3A27%3A30Z+base%3Amaster)
### New Lints
* [`large_futures`]
[#10414](https://github.com/rust-lang/rust-clippy/pull/10414)
* [`missing_assert_message`]
[#10362](https://github.com/rust-lang/rust-clippy/pull/10362)
* [`clear_with_drain`]
[#10528](https://github.com/rust-lang/rust-clippy/pull/10528)
* [`redundant_async_block`]
[#10448](https://github.com/rust-lang/rust-clippy/pull/10448)
* [`collection_is_never_read`]
[#10415](https://github.com/rust-lang/rust-clippy/pull/10415)
* [`let_with_type_underscore`]
[#10467](https://github.com/rust-lang/rust-clippy/pull/10467)
* [`tests_outside_test_module`]
[#10543](https://github.com/rust-lang/rust-clippy/pull/10543)
* [`allow_attributes`]
[#10481](https://github.com/rust-lang/rust-clippy/pull/10481)
* [`suspicious_doc_comments`]
[#10497](https://github.com/rust-lang/rust-clippy/pull/10497)
* [`unnecessary_box_returns`]
[#9102](https://github.com/rust-lang/rust-clippy/pull/9102)
* [`manual_main_separator_str`]
[#10483](https://github.com/rust-lang/rust-clippy/pull/10483)
* [`unnecessary_struct_initialization`]
[#10489](https://github.com/rust-lang/rust-clippy/pull/10489)
* [`manual_slice_size_calculation`]
[#10601](https://github.com/rust-lang/rust-clippy/pull/10601)
* [`lines_filter_map_ok`]
[#10534](https://github.com/rust-lang/rust-clippy/pull/10534)
### Moves and Deprecations
* Moved [`let_underscore_untyped`] to `restriction`
[#10442](https://github.com/rust-lang/rust-clippy/pull/10442)
### Enhancements
* [`extra_unused_type_parameters`]: No longer lints on public items if `avoid-breaking-exported-api` is set
[#10536](https://github.com/rust-lang/rust-clippy/pull/10536)
* [`len_without_is_empty`]: Now also detects `async` functions
[#10359](https://github.com/rust-lang/rust-clippy/pull/10359)
* [`arithmetic_side_effects`]: Now correctly handles divisions and modulo expressions if the right-hand-side
is unknown
[#10585](https://github.com/rust-lang/rust-clippy/pull/10585)
* [`nonminimal_bool`]: No longer ignores `#[allow]` attributes
[#10588](https://github.com/rust-lang/rust-clippy/pull/10588)
* [`uninit_vec`], [`uninit_assumed_init`]: Now uses a better heuristic
[#10520](https://github.com/rust-lang/rust-clippy/pull/10520)
* [`ifs_same_cond`]: Now also detects immutable method calls.
[#10350](https://github.com/rust-lang/rust-clippy/pull/10350)
* [`arithmetic_side_effects`]: No longer lints on right or left shifts with constant integers, as the
compiler warns about them
[#10309](https://github.com/rust-lang/rust-clippy/pull/10309)
* [`items_after_statements`]: `#[allow(items_after_statements)]` now works on items
[#10542](https://github.com/rust-lang/rust-clippy/pull/10542)
* [`significant_drop_tightening`]: Was optimized
[#10533](https://github.com/rust-lang/rust-clippy/pull/10533)
### False Positive Fixes
* [`single_component_path_imports`]: No longer lints if the import is used relative to `self`
[#10566](https://github.com/rust-lang/rust-clippy/pull/10566)
* [`derivable_impls`]: No longer suggests deriving `Default` on generics with implicit arguments
[#10399](https://github.com/rust-lang/rust-clippy/pull/10399)
* [`let_unit_value`]: No longer lints if the expression contains an `await`
[#10439](https://github.com/rust-lang/rust-clippy/pull/10439)
* [`double_must_use`]: Now ignores `async` functions
[#10589](https://github.com/rust-lang/rust-clippy/pull/10589)
* [`manual_clamp`]: No longer lints in constant context
[#10479](https://github.com/rust-lang/rust-clippy/pull/10479)
* [`almost_swapped`]: Now ignores external macros
[#10502](https://github.com/rust-lang/rust-clippy/pull/10502)
* [`nonminimal_bool`]: Now ignores macros
[#10527](https://github.com/rust-lang/rust-clippy/pull/10527)
* [`needless_return`]: No longer lints match statements with incompatible branches
[#10593](https://github.com/rust-lang/rust-clippy/pull/10593)
* [`use_self`]: Do not suggest using `Self` in const generic parameters
[#10375](https://github.com/rust-lang/rust-clippy/pull/10375)
* [`mem_replace_option_with_none`]: No longer lints on field expressions
[#10594](https://github.com/rust-lang/rust-clippy/pull/10594)
* [`items_after_statements`]: No longer lints on items from macros
[#10542](https://github.com/rust-lang/rust-clippy/pull/10542)
* [`print_literal`], [`write_literal`]: No longer lint strings coming from the `file!()` macro
[#10573](https://github.com/rust-lang/rust-clippy/pull/10573)
* [`uninit_vec`], [`uninit_assumed_init`]: Now check the types inside arrays and tuples
[#10553](https://github.com/rust-lang/rust-clippy/pull/10553)
* [`almost_swapped`]: No longer lints if a variable is assigned to itself
[#10499](https://github.com/rust-lang/rust-clippy/pull/10499)
* [`missing_docs_in_private_items`]: No longer lints on public items
[#10324](https://github.com/rust-lang/rust-clippy/pull/10324)
### Suggestion Fixes/Improvements
* [`extra_unused_type_parameters`]: The suggestion is now machine applicable
[#10536](https://github.com/rust-lang/rust-clippy/pull/10536)
* [`match_single_binding`]: Now adds a semicolon after the suggestion
[#10470](https://github.com/rust-lang/rust-clippy/pull/10470)
* [`missing_const_for_fn`]: Now includes a note if the change could break compatibility
[#10618](https://github.com/rust-lang/rust-clippy/pull/10618)
* [`cast_possible_truncation`]: Corrected suggestion for float and wildcard casts
[#10496](https://github.com/rust-lang/rust-clippy/pull/10496)
* [`transmutes_expressible_as_ptr_casts`]: The suggestion now includes parentheses when they are required
[#10454](https://github.com/rust-lang/rust-clippy/pull/10454)
### ICE Fixes
* [`needless_borrow`]: No longer panics on ambiguous projections
[#10403](https://github.com/rust-lang/rust-clippy/pull/10403)
* [`multiple_unsafe_ops_per_block`]: Fix ICE when calling a function-like object in an unsafe block
[#10405](https://github.com/rust-lang/rust-clippy/pull/10405)
### Others
* `clippy-driver` now searches parent directories for `clippy.toml` files
[#10592](https://github.com/rust-lang/rust-clippy/pull/10592)
* Fixed a deserialization error for the `array-size-threshold` config value
[#10423](https://github.com/rust-lang/rust-clippy/pull/10423)
## Rust 1.69
Released 2023-04-20
[View all 72 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2023-01-13T06%3A12%3A46Z..2023-02-25T23%3A48%3A10Z+base%3Amaster)
### New Lints
* [`no_mangle_with_rust_abi`]
[#10369](https://github.com/rust-lang/rust-clippy/pull/10369)
* [`significant_drop_tightening`]
[#10163](https://github.com/rust-lang/rust-clippy/pull/10163)
* [`suspicious_command_arg_space`]
[#10317](https://github.com/rust-lang/rust-clippy/pull/10317)
* [`let_underscore_untyped`]
[#10356](https://github.com/rust-lang/rust-clippy/pull/10356)
* [`question_mark_used`]
[#10342](https://github.com/rust-lang/rust-clippy/pull/10342)
* [`extra_unused_type_parameters`]
[#10028](https://github.com/rust-lang/rust-clippy/pull/10028)
* [`impl_trait_in_params`]
[10197](https://github.com/rust-lang/rust-clippy/pull/10197)
* [`transmute_int_to_non_zero`]
[#10360](https://github.com/rust-lang/rust-clippy/pull/10360)
* [`multiple_unsafe_ops_per_block`]
[#10206](https://github.com/rust-lang/rust-clippy/pull/10206)
### Moves and Deprecations
* Moved [`uninlined_format_args`] to `pedantic` (Now allow-by-default)
[#10265](https://github.com/rust-lang/rust-clippy/pull/10265)
* Moved [`unchecked_duration_subtraction`] to `pedantic` (Now allow-by-default)
[#10194](https://github.com/rust-lang/rust-clippy/pull/10194)
### Enhancements
* [`arithmetic_side_effects`]: No longer lints if safe constant values are used.
[#10310](https://github.com/rust-lang/rust-clippy/pull/10310)
* [`needless_lifetimes`]: Now works in local macros
[#10257](https://github.com/rust-lang/rust-clippy/pull/10257)
* [`unused_io_amount`]: Now detects usages of `is_ok` and `is_err`
[#10225](https://github.com/rust-lang/rust-clippy/pull/10225)
* [`missing_docs_in_private_items`]: Added new configuration `missing-docs-in-crate-items` to lint
on items visible within the current crate. For example, `pub(crate)` items.
[#10303](https://github.com/rust-lang/rust-clippy/pull/10303)
* [`almost_swapped`]: Now detects almost swaps using `let` statements
[#10177](https://github.com/rust-lang/rust-clippy/pull/10177)
* [`wildcard_enum_match_arm`]: Now lints missing private variants, for local enums
[#10250](https://github.com/rust-lang/rust-clippy/pull/10250)
### False Positive Fixes
* [`explicit_auto_deref`]: Now considers projections when determining if auto deref is applicable
[#10386](https://github.com/rust-lang/rust-clippy/pull/10386)
* [`manual_let_else`]: Now considers side effects of branches before linting
[#10336](https://github.com/rust-lang/rust-clippy/pull/10336)
* [`uninlined_format_args`]: No longer lints for arguments with generic parameters
[#10343](https://github.com/rust-lang/rust-clippy/pull/10343)
* [`needless_lifetimes`]: No longer lints signatures in macros if the lifetime is a metavariable
[#10380](https://github.com/rust-lang/rust-clippy/pull/10380)
* [`len_without_is_empty`]: No longer lints if `len` as a non-default signature
[#10255](https://github.com/rust-lang/rust-clippy/pull/10255)
* [`unusual_byte_groupings`]: Relaxed the required restrictions for specific sizes to reduce false
positives
[#10353](https://github.com/rust-lang/rust-clippy/pull/10353)
* [`manual_let_else`]: No longer lints `if-else` blocks if they can divergent
[#10332](https://github.com/rust-lang/rust-clippy/pull/10332)
* [`expect_used`], [`unwrap_used`], [`dbg_macro`], [`print_stdout`], [`print_stderr`]: No longer lint
in test functions if `allow-expect-in-tests` is set
[#10391](https://github.com/rust-lang/rust-clippy/pull/10391)
* [`unnecessary_safety_comment`]: No longer lints code inside macros
[#10106](https://github.com/rust-lang/rust-clippy/pull/10106)
* [`never_loop`]: No longer lints statements following break statements for outer blocks.
[#10311](https://github.com/rust-lang/rust-clippy/pull/10311)
### Suggestion Fixes/Improvements
* [`box_default`]: The suggestion now includes the type for trait objects when needed
[#10382](https://github.com/rust-lang/rust-clippy/pull/10382)
* [`cast_possible_truncation`]: Now suggests using `try_from` or allowing the lint
[#10038](https://github.com/rust-lang/rust-clippy/pull/10038)
* [`invalid_regex`]: Regex errors for non-literals or regular strings containing escape sequences will
now show the complete error
[#10231](https://github.com/rust-lang/rust-clippy/pull/10231)
* [`transmutes_expressible_as_ptr_casts`]: The suggestion now works if the base type is borrowed
[#10193](https://github.com/rust-lang/rust-clippy/pull/10193)
* [`needless_return`]: Now removes all semicolons on the same line
[#10187](https://github.com/rust-lang/rust-clippy/pull/10187)
* [`suspicious_to_owned`]: The suggestion now shows all options clearly
[#10295](https://github.com/rust-lang/rust-clippy/pull/10295)
* [`bytes_nth`]: Now suggests the correct replacement based on the context
[#10361](https://github.com/rust-lang/rust-clippy/pull/10361)
* [`bool_assert_comparison`]: The suggestion is now machine applicable
[#10218](https://github.com/rust-lang/rust-clippy/pull/10218)
* [`cast_possible_truncation`]: Corrected the lint name in the help message
[#10330](https://github.com/rust-lang/rust-clippy/pull/10330)
* [`needless_return`]: The suggestion now works on if sequences
[#10345](https://github.com/rust-lang/rust-clippy/pull/10345)
* [`needless_lifetimes`]: The suggestion is now machine applicable
[#10222](https://github.com/rust-lang/rust-clippy/pull/10222)
* [`map_entry`]: The suggestion no longer expands macros
[#10346](https://github.com/rust-lang/rust-clippy/pull/10346)
### ICE Fixes
* [`needless_pass_by_value`]: Fixed an ICE caused by how late bounds were handled
[#10328](https://github.com/rust-lang/rust-clippy/pull/10328)
* [`needless_borrow`]: No longer panics on ambiguous projections
[#10403](https://github.com/rust-lang/rust-clippy/pull/10403)
### Documentation Improvements
* All configurations are now documented in the Clippy Book
[#10199](https://github.com/rust-lang/rust-clippy/pull/10199)
## Rust 1.68
Released 2023-03-09
[View all 76 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2022-12-01T20%3A40%3A04Z..2023-01-12T18%3A58%3A59Z+base%3Amaster)
### New Lints
* [`permissions_set_readonly_false`]
[#10063](https://github.com/rust-lang/rust-clippy/pull/10063)
* [`almost_complete_range`]
[#10043](https://github.com/rust-lang/rust-clippy/pull/10043)
* [`size_of_ref`]
[#10098](https://github.com/rust-lang/rust-clippy/pull/10098)
* [`semicolon_outside_block`]
[#9826](https://github.com/rust-lang/rust-clippy/pull/9826)
* [`semicolon_inside_block`]
[#9826](https://github.com/rust-lang/rust-clippy/pull/9826)
* [`transmute_null_to_fn`]
[#10099](https://github.com/rust-lang/rust-clippy/pull/10099)
* [`fn_null_check`]
[#10099](https://github.com/rust-lang/rust-clippy/pull/10099)
### Moves and Deprecations
* Moved [`manual_clamp`] to `nursery` (Now allow-by-default)
[#10101](https://github.com/rust-lang/rust-clippy/pull/10101)
* Moved [`mutex_atomic`] to `restriction`
[#10115](https://github.com/rust-lang/rust-clippy/pull/10115)
* Renamed `derive_hash_xor_eq` to [`derived_hash_with_manual_eq`]
[#10184](https://github.com/rust-lang/rust-clippy/pull/10184)
### Enhancements
* [`collapsible_str_replace`]: Now takes MSRV into consideration. The minimal version is 1.58
[#10047](https://github.com/rust-lang/rust-clippy/pull/10047)
* [`unused_self`]: No longer lints, if the method body contains a `todo!()` call
[#10166](https://github.com/rust-lang/rust-clippy/pull/10166)
* [`derivable_impls`]: Now suggests deriving `Default` for enums with default unit variants
[#10161](https://github.com/rust-lang/rust-clippy/pull/10161)
* [`arithmetic_side_effects`]: Added two new config values
`arithmetic-side-effects-allowed-binary` and `arithmetic-side-effects-allowed-unary`
to allow operation on user types
[#9840](https://github.com/rust-lang/rust-clippy/pull/9840)
* [`large_const_arrays`], [`large_stack_arrays`]: avoid integer overflow when calculating
total array size
[#10103](https://github.com/rust-lang/rust-clippy/pull/10103)
* [`indexing_slicing`]: add new config `suppress-restriction-lint-in-const` to enable
restriction lints, even if the suggestion might not be applicable
[#9920](https://github.com/rust-lang/rust-clippy/pull/9920)
* [`needless_borrow`], [`redundant_clone`]: Now track references better and detect more cases
[#9701](https://github.com/rust-lang/rust-clippy/pull/9701)
* [`derived_hash_with_manual_eq`]: Now allows `#[derive(PartialEq)]` with custom `Hash`
implementations
[#10184](https://github.com/rust-lang/rust-clippy/pull/10184)
* [`manual_is_ascii_check`]: Now detects ranges with `.contains()` calls
[#10053](https://github.com/rust-lang/rust-clippy/pull/10053)
* [`transmuting_null`]: Now detects `const` pointers to all types
[#10099](https://github.com/rust-lang/rust-clippy/pull/10099)
* [`needless_return`]: Now detects more cases for returns of owned values
[#10110](https://github.com/rust-lang/rust-clippy/pull/10110)
### False Positive Fixes
* [`field_reassign_with_default`]: No longer lints cases, where values are initializes from
closures capturing struct values
[#10143](https://github.com/rust-lang/rust-clippy/pull/10143)
* [`seek_to_start_instead_of_rewind`]: No longer lints, if the return of `seek` is used.
[#10096](https://github.com/rust-lang/rust-clippy/pull/10096)
* [`manual_filter`]: Now ignores if expressions where the else branch has side effects or
doesn't return `None`
[#10091](https://github.com/rust-lang/rust-clippy/pull/10091)
* [`implicit_clone`]: No longer lints if the type doesn't implement clone
[#10022](https://github.com/rust-lang/rust-clippy/pull/10022)
* [`match_wildcard_for_single_variants`]: No longer lints on wildcards with a guard
[#10056](https://github.com/rust-lang/rust-clippy/pull/10056)
* [`drop_ref`]: No longer lints idiomatic expression in `match` arms
[#10142](https://github.com/rust-lang/rust-clippy/pull/10142)
* [`arithmetic_side_effects`]: No longer lints on corner cases with negative number literals
[#9867](https://github.com/rust-lang/rust-clippy/pull/9867)
* [`string_lit_as_bytes`]: No longer lints in scrutinies of `match` statements
[#10012](https://github.com/rust-lang/rust-clippy/pull/10012)
* [`manual_assert`]: No longer lints in `else if` statements
[#10013](https://github.com/rust-lang/rust-clippy/pull/10013)
* [`needless_return`]: don't lint when using `do yeet`
[#10109](https://github.com/rust-lang/rust-clippy/pull/10109)
* All lints: No longer lint in enum discriminant values when the suggestion won't work in a
const context
[#10008](https://github.com/rust-lang/rust-clippy/pull/10008)
* [`single_element_loop`]: No longer lints, if the loop contains a `break` or `continue`
[#10162](https://github.com/rust-lang/rust-clippy/pull/10162)
* [`uninlined_format_args`]: No longer suggests inlining arguments in `assert!` and
`debug_assert!` macros before 2021 edition
[#10055](https://github.com/rust-lang/rust-clippy/pull/10055)
* [`explicit_counter_loop`]: No longer ignores counter changes after `continue` expressions
[#10094](https://github.com/rust-lang/rust-clippy/pull/10094)
* [`from_over_into`]: No longer lints on opaque types
[#9982](https://github.com/rust-lang/rust-clippy/pull/9982)
* [`expl_impl_clone_on_copy`]: No longer lints on `#[repr(packed)]` structs with generic
parameters
[#10189](https://github.com/rust-lang/rust-clippy/pull/10189)
### Suggestion Fixes/Improvements
* [`zero_ptr`]: Now suggests `core::` paths for `no_std` crates
[#10023](https://github.com/rust-lang/rust-clippy/pull/10023)
* [`useless_conversion`]: Now suggests removing calls to `into_iter()` on an expression
implementing `Iterator`
[#10020](https://github.com/rust-lang/rust-clippy/pull/10020)
* [`box_default`]: The suggestion now uses short paths
[#10153](https://github.com/rust-lang/rust-clippy/pull/10153)
* [`default_trait_access`], [`clone_on_copy`]: The suggestion now uses short paths
[#10160](https://github.com/rust-lang/rust-clippy/pull/10160)
* [`comparison_to_empty`]: The suggestion now removes unused deref operations
[#9962](https://github.com/rust-lang/rust-clippy/pull/9962)
* [`manual_let_else`]: Suggestions for or-patterns now include required brackets.
[#9966](https://github.com/rust-lang/rust-clippy/pull/9966)
* [`match_single_binding`]: suggestion no longer introduces unneeded semicolons
[#10060](https://github.com/rust-lang/rust-clippy/pull/10060)
* [`case_sensitive_file_extension_comparisons`]: Now displays a suggestion with `Path`
[#10107](https://github.com/rust-lang/rust-clippy/pull/10107)
* [`empty_structs_with_brackets`]: The suggestion is no longer machine applicable, to avoid
errors when accessing struct fields
[#10141](https://github.com/rust-lang/rust-clippy/pull/10141)
* [`identity_op`]: Removes borrows in the suggestion when needed
[#10004](https://github.com/rust-lang/rust-clippy/pull/10004)
* [`suboptimal_flops`]: The suggestion now includes parentheses when required
[#10113](https://github.com/rust-lang/rust-clippy/pull/10113)
* [`iter_kv_map`]: Now handles `mut` and reference annotations in the suggestion
[#10159](https://github.com/rust-lang/rust-clippy/pull/10159)
* [`redundant_static_lifetimes`]: The suggestion no longer removes `mut` from references
[#10006](https://github.com/rust-lang/rust-clippy/pull/10006)
### ICE Fixes
* [`new_ret_no_self`]: Now avoids a stack overflow for `impl Trait` types
[#10086](https://github.com/rust-lang/rust-clippy/pull/10086)
* [`unnecessary_to_owned`]: Now handles compiler generated notes better
[#10027](https://github.com/rust-lang/rust-clippy/pull/10027)
### Others
* `SYSROOT` and `--sysroot` can now be set at the same time
[#10149](https://github.com/rust-lang/rust-clippy/pull/10149)
* Fix error when providing an `array-size-threshold` in `clippy.toml`
[#10423](https://github.com/rust-lang/rust-clippy/pull/10423)
## Rust 1.67
Released 2023-01-26
[View all 104 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2022-10-23T13%3A35%3A19Z..2022-12-01T13%3A34%3A39Z+base%3Amaster)
### New Lints
* [`seek_from_current`]
[#9681](https://github.com/rust-lang/rust-clippy/pull/9681)
* [`from_raw_with_void_ptr`]
[#9690](https://github.com/rust-lang/rust-clippy/pull/9690)
* [`misnamed_getters`]
[#9770](https://github.com/rust-lang/rust-clippy/pull/9770)
* [`seek_to_start_instead_of_rewind`]
[#9667](https://github.com/rust-lang/rust-clippy/pull/9667)
* [`suspicious_xor_used_as_pow`]
[#9506](https://github.com/rust-lang/rust-clippy/pull/9506)
* [`unnecessary_safety_doc`]
[#9822](https://github.com/rust-lang/rust-clippy/pull/9822)
* [`unchecked_duration_subtraction`]
[#9570](https://github.com/rust-lang/rust-clippy/pull/9570)
* [`manual_is_ascii_check`]
[#9765](https://github.com/rust-lang/rust-clippy/pull/9765)
* [`unnecessary_safety_comment`]
[#9851](https://github.com/rust-lang/rust-clippy/pull/9851)
* [`let_underscore_future`]
[#9760](https://github.com/rust-lang/rust-clippy/pull/9760)
* [`manual_let_else`]
[#8437](https://github.com/rust-lang/rust-clippy/pull/8437)
### Moves and Deprecations
* Moved [`needless_collect`] to `nursery` (Now allow-by-default)
[#9705](https://github.com/rust-lang/rust-clippy/pull/9705)
* Moved [`or_fun_call`] to `nursery` (Now allow-by-default)
[#9829](https://github.com/rust-lang/rust-clippy/pull/9829)
* Uplifted [`let_underscore_lock`] into rustc
[#9697](https://github.com/rust-lang/rust-clippy/pull/9697)
* Uplifted [`let_underscore_drop`] into rustc
[#9697](https://github.com/rust-lang/rust-clippy/pull/9697)
* Moved [`bool_to_int_with_if`] to `pedantic` (Now allow-by-default)
[#9830](https://github.com/rust-lang/rust-clippy/pull/9830)
* Move `index_refutable_slice` to `pedantic` (Now warn-by-default)
[#9975](https://github.com/rust-lang/rust-clippy/pull/9975)
* Moved [`manual_clamp`] to `nursery` (Now allow-by-default)
[#10101](https://github.com/rust-lang/rust-clippy/pull/10101)
### Enhancements
* The scope of `#![clippy::msrv]` is now tracked correctly
[#9924](https://github.com/rust-lang/rust-clippy/pull/9924)
* `#[clippy::msrv]` can now be used as an outer attribute
[#9860](https://github.com/rust-lang/rust-clippy/pull/9860)
* Clippy will now avoid Cargo's cache, if `Cargo.toml` or `clippy.toml` have changed
[#9707](https://github.com/rust-lang/rust-clippy/pull/9707)
* [`uninlined_format_args`]: Added a new config `allow-mixed-uninlined-format-args` to allow the
lint, if only some arguments can be inlined
[#9865](https://github.com/rust-lang/rust-clippy/pull/9865)
* [`needless_lifetimes`]: Now provides suggests for individual lifetimes
[#9743](https://github.com/rust-lang/rust-clippy/pull/9743)
* [`needless_collect`]: Now detects needless `is_empty` and `contains` calls
[#8744](https://github.com/rust-lang/rust-clippy/pull/8744)
* [`blanket_clippy_restriction_lints`]: Now lints, if `clippy::restriction` is enabled via the
command line arguments
[#9755](https://github.com/rust-lang/rust-clippy/pull/9755)
* [`mutable_key_type`]: Now has the `ignore-interior-mutability` configuration, to add types which
should be ignored by the lint
[#9692](https://github.com/rust-lang/rust-clippy/pull/9692)
* [`uninlined_format_args`]: Now works for multiline `format!` expressions
[#9945](https://github.com/rust-lang/rust-clippy/pull/9945)
* [`cognitive_complexity`]: Now works for async functions
[#9828](https://github.com/rust-lang/rust-clippy/pull/9828)
[#9836](https://github.com/rust-lang/rust-clippy/pull/9836)
* [`vec_box`]: Now avoids an off-by-one error when using the `vec-box-size-threshold` configuration
[#9848](https://github.com/rust-lang/rust-clippy/pull/9848)
* [`never_loop`]: Now correctly handles breaks in nested labeled blocks
[#9858](https://github.com/rust-lang/rust-clippy/pull/9858)
[#9837](https://github.com/rust-lang/rust-clippy/pull/9837)
* [`disallowed_methods`], [`disallowed_types`], [`disallowed_macros`]: Now correctly resolve
paths, if a crate is used multiple times with different versions
[#9800](https://github.com/rust-lang/rust-clippy/pull/9800)
* [`disallowed_methods`]: Can now be used for local methods
[#9800](https://github.com/rust-lang/rust-clippy/pull/9800)
* [`print_stdout`], [`print_stderr`]: Can now be enabled in test with the `allow-print-in-tests`
config value
[#9797](https://github.com/rust-lang/rust-clippy/pull/9797)
* [`from_raw_with_void_ptr`]: Now works for `Rc`, `Arc`, `alloc::rc::Weak` and
`alloc::sync::Weak` types.
[#9700](https://github.com/rust-lang/rust-clippy/pull/9700)
* [`needless_borrowed_reference`]: Now works for struct and tuple patterns with wildcards
[#9855](https://github.com/rust-lang/rust-clippy/pull/9855)
* [`or_fun_call`]: Now supports `map_or` methods
[#9689](https://github.com/rust-lang/rust-clippy/pull/9689)
* [`unwrap_used`], [`expect_used`]: No longer lints in test code
[#9686](https://github.com/rust-lang/rust-clippy/pull/9686)
* [`fn_params_excessive_bools`]: Is now emitted with the lint level at the linted function
[#9698](https://github.com/rust-lang/rust-clippy/pull/9698)
### False Positive Fixes
* [`new_ret_no_self`]: No longer lints when `impl Trait<Self>` is returned
[#9733](https://github.com/rust-lang/rust-clippy/pull/9733)
* [`unnecessary_lazy_evaluations`]: No longer lints, if the type has a significant drop
[#9750](https://github.com/rust-lang/rust-clippy/pull/9750)
* [`option_if_let_else`]: No longer lints, if any arm has guard
[#9747](https://github.com/rust-lang/rust-clippy/pull/9747)
* [`explicit_auto_deref`]: No longer lints, if the target type is a projection with generic
arguments
[#9813](https://github.com/rust-lang/rust-clippy/pull/9813)
* [`unnecessary_to_owned`]: No longer lints, if the suggestion effects types
[#9796](https://github.com/rust-lang/rust-clippy/pull/9796)
* [`needless_borrow`]: No longer lints, if the suggestion is affected by `Deref`
[#9674](https://github.com/rust-lang/rust-clippy/pull/9674)
* [`unused_unit`]: No longer lints, if lifetimes are bound to the return type
[#9849](https://github.com/rust-lang/rust-clippy/pull/9849)
* [`mut_mut`]: No longer lints cases with unsized mutable references
[#9835](https://github.com/rust-lang/rust-clippy/pull/9835)
* [`bool_to_int_with_if`]: No longer lints in const context
[#9738](https://github.com/rust-lang/rust-clippy/pull/9738)
* [`use_self`]: No longer lints in macros
[#9704](https://github.com/rust-lang/rust-clippy/pull/9704)
* [`unnecessary_operation`]: No longer lints, if multiple macros are involved
[#9981](https://github.com/rust-lang/rust-clippy/pull/9981)
* [`allow_attributes_without_reason`]: No longer lints inside external macros
[#9630](https://github.com/rust-lang/rust-clippy/pull/9630)
* [`question_mark`]: No longer lints for `if let Err()` with an `else` branch
[#9722](https://github.com/rust-lang/rust-clippy/pull/9722)
* [`unnecessary_cast`]: No longer lints if the identifier and cast originate from different macros
[#9980](https://github.com/rust-lang/rust-clippy/pull/9980)
* [`arithmetic_side_effects`]: Now detects operations with associated constants
[#9592](https://github.com/rust-lang/rust-clippy/pull/9592)
* [`explicit_auto_deref`]: No longer lints, if the initial value is not a reference or reference
receiver
[#9997](https://github.com/rust-lang/rust-clippy/pull/9997)
* [`module_name_repetitions`], [`single_component_path_imports`]: Now handle `#[allow]`
attributes correctly
[#9879](https://github.com/rust-lang/rust-clippy/pull/9879)
* [`bool_to_int_with_if`]: No longer lints `if let` statements
[#9714](https://github.com/rust-lang/rust-clippy/pull/9714)
* [`needless_borrow`]: No longer lints, `if`-`else`-statements that require the borrow
[#9791](https://github.com/rust-lang/rust-clippy/pull/9791)
* [`needless_borrow`]: No longer lints borrows, if moves were illegal
[#9711](https://github.com/rust-lang/rust-clippy/pull/9711)
* [`manual_swap`]: No longer lints in const context
[#9871](https://github.com/rust-lang/rust-clippy/pull/9871)
### Suggestion Fixes/Improvements
* [`missing_safety_doc`], [`missing_errors_doc`], [`missing_panics_doc`]: No longer show the
entire item in the lint emission.
[#9772](https://github.com/rust-lang/rust-clippy/pull/9772)
* [`needless_lifetimes`]: Only suggests `'_` when it's applicable
[#9743](https://github.com/rust-lang/rust-clippy/pull/9743)
* [`use_self`]: Now suggests full paths correctly
[#9726](https://github.com/rust-lang/rust-clippy/pull/9726)
* [`redundant_closure_call`]: Now correctly deals with macros during suggestion creation
[#9987](https://github.com/rust-lang/rust-clippy/pull/9987)
* [`unnecessary_cast`]: Suggestions now correctly deal with references
[#9996](https://github.com/rust-lang/rust-clippy/pull/9996)
* [`unnecessary_join`]: Suggestions now correctly use [turbofish] operators
[#9779](https://github.com/rust-lang/rust-clippy/pull/9779)
* [`equatable_if_let`]: Can now suggest `matches!` replacements
[#9368](https://github.com/rust-lang/rust-clippy/pull/9368)
* [`string_extend_chars`]: Suggestions now correctly work for `str` slices
[#9741](https://github.com/rust-lang/rust-clippy/pull/9741)
* [`redundant_closure_for_method_calls`]: Suggestions now include angle brackets and generic
arguments if needed
[#9745](https://github.com/rust-lang/rust-clippy/pull/9745)
* [`manual_let_else`]: Suggestions no longer expand macro calls
[#9943](https://github.com/rust-lang/rust-clippy/pull/9943)
* [`infallible_destructuring_match`]: Suggestions now preserve references
[#9850](https://github.com/rust-lang/rust-clippy/pull/9850)
* [`result_large_err`]: The error now shows the largest enum variant
[#9662](https://github.com/rust-lang/rust-clippy/pull/9662)
* [`needless_return`]: Suggestions are now formatted better
[#9967](https://github.com/rust-lang/rust-clippy/pull/9967)
* [`unused_rounding`]: The suggestion now preserves the original float literal notation
[#9870](https://github.com/rust-lang/rust-clippy/pull/9870)
[turbofish]: https://turbo.fish/::%3CClippy%3E
### ICE Fixes
* [`result_large_err`]: Fixed ICE for empty enums
[#10007](https://github.com/rust-lang/rust-clippy/pull/10007)
* [`redundant_allocation`]: Fixed ICE for types with bounded variables
[#9773](https://github.com/rust-lang/rust-clippy/pull/9773)
* [`unused_rounding`]: Fixed ICE, if `_` was used as a separator
[#10001](https://github.com/rust-lang/rust-clippy/pull/10001)
## Rust 1.66
Released 2022-12-15
[View all 116 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2022-09-09T17%3A32%3A39Z..2022-10-23T11%3A27%3A24Z+base%3Amaster)
### New Lints
* [`manual_clamp`]
[#9484](https://github.com/rust-lang/rust-clippy/pull/9484)
* [`missing_trait_methods`]
[#9670](https://github.com/rust-lang/rust-clippy/pull/9670)
* [`unused_format_specs`]
[#9637](https://github.com/rust-lang/rust-clippy/pull/9637)
* [`iter_kv_map`]
[#9409](https://github.com/rust-lang/rust-clippy/pull/9409)
* [`manual_filter`]
[#9451](https://github.com/rust-lang/rust-clippy/pull/9451)
* [`box_default`]
[#9511](https://github.com/rust-lang/rust-clippy/pull/9511)
* [`implicit_saturating_add`]
[#9549](https://github.com/rust-lang/rust-clippy/pull/9549)
* [`as_ptr_cast_mut`]
[#9572](https://github.com/rust-lang/rust-clippy/pull/9572)
* [`disallowed_macros`]
[#9495](https://github.com/rust-lang/rust-clippy/pull/9495)
* [`partial_pub_fields`]
[#9658](https://github.com/rust-lang/rust-clippy/pull/9658)
* [`uninlined_format_args`]
[#9233](https://github.com/rust-lang/rust-clippy/pull/9233)
* [`cast_nan_to_int`]
[#9617](https://github.com/rust-lang/rust-clippy/pull/9617)
### Moves and Deprecations
* `positional_named_format_parameters` was uplifted to rustc under the new name
`named_arguments_used_positionally`
[#8518](https://github.com/rust-lang/rust-clippy/pull/8518)
* Moved [`implicit_saturating_sub`] to `style` (Now warn-by-default)
[#9584](https://github.com/rust-lang/rust-clippy/pull/9584)
* Moved `derive_partial_eq_without_eq` to `nursery` (now allow-by-default)
[#9536](https://github.com/rust-lang/rust-clippy/pull/9536)
### Enhancements
* [`nonstandard_macro_braces`]: Now includes `matches!()` in the default lint config
[#9471](https://github.com/rust-lang/rust-clippy/pull/9471)
* [`suboptimal_flops`]: Now supports multiplication and subtraction operations
[#9581](https://github.com/rust-lang/rust-clippy/pull/9581)
* [`arithmetic_side_effects`]: Now detects cases with literals behind references
[#9587](https://github.com/rust-lang/rust-clippy/pull/9587)
* [`upper_case_acronyms`]: Now also checks enum names
[#9580](https://github.com/rust-lang/rust-clippy/pull/9580)
* [`needless_borrowed_reference`]: Now lints nested patterns
[#9573](https://github.com/rust-lang/rust-clippy/pull/9573)
* [`unnecessary_cast`]: Now works for non-trivial non-literal expressions
[#9576](https://github.com/rust-lang/rust-clippy/pull/9576)
* [`arithmetic_side_effects`]: Now detects operations with custom types
[#9559](https://github.com/rust-lang/rust-clippy/pull/9559)
* [`disallowed_methods`], [`disallowed_types`]: Not correctly lints types, functions and macros
with the same path
[#9495](https://github.com/rust-lang/rust-clippy/pull/9495)
* [`self_named_module_files`], [`mod_module_files`]: Now take remapped path prefixes into account
[#9475](https://github.com/rust-lang/rust-clippy/pull/9475)
* [`bool_to_int_with_if`]: Now detects the inverse if case
[#9476](https://github.com/rust-lang/rust-clippy/pull/9476)
### False Positive Fixes
* [`arithmetic_side_effects`]: Now allows operations that can't overflow
[#9474](https://github.com/rust-lang/rust-clippy/pull/9474)
* [`unnecessary_lazy_evaluations`]: No longer lints in external macros
[#9486](https://github.com/rust-lang/rust-clippy/pull/9486)
* [`needless_borrow`], [`explicit_auto_deref`]: No longer lint on unions that require the reference
[#9490](https://github.com/rust-lang/rust-clippy/pull/9490)
* [`almost_complete_letter_range`]: No longer lints in external macros
[#9467](https://github.com/rust-lang/rust-clippy/pull/9467)
* [`drop_copy`]: No longer lints on idiomatic cases in match arms
[#9491](https://github.com/rust-lang/rust-clippy/pull/9491)
* [`question_mark`]: No longer lints in const context
[#9487](https://github.com/rust-lang/rust-clippy/pull/9487)
* [`collapsible_if`]: Suggestion now work in macros
[#9410](https://github.com/rust-lang/rust-clippy/pull/9410)
* [`std_instead_of_core`]: No longer triggers on unstable modules
[#9545](https://github.com/rust-lang/rust-clippy/pull/9545)
* [`unused_peekable`]: No longer lints, if the peak is done in a closure or function
[#9465](https://github.com/rust-lang/rust-clippy/pull/9465)
* [`useless_attribute`]: No longer lints on `#[allow]` attributes for [`unsafe_removed_from_name`]
[#9593](https://github.com/rust-lang/rust-clippy/pull/9593)
* [`unnecessary_lazy_evaluations`]: No longer suggest switching to early evaluation when type has
custom `Drop` implementation
[#9551](https://github.com/rust-lang/rust-clippy/pull/9551)
* [`unnecessary_cast`]: No longer lints on negative hexadecimal literals when cast as floats
[#9609](https://github.com/rust-lang/rust-clippy/pull/9609)
* [`use_self`]: No longer lints in proc macros
[#9454](https://github.com/rust-lang/rust-clippy/pull/9454)
* [`never_loop`]: Now takes `let ... else` statements into consideration.
[#9496](https://github.com/rust-lang/rust-clippy/pull/9496)
* [`default_numeric_fallback`]: Now ignores constants
[#9636](https://github.com/rust-lang/rust-clippy/pull/9636)
* [`uninit_vec`]: No longer lints `Vec::set_len(0)`
[#9519](https://github.com/rust-lang/rust-clippy/pull/9519)
* [`arithmetic_side_effects`]: Now ignores references to integer types
[#9507](https://github.com/rust-lang/rust-clippy/pull/9507)
* [`large_stack_arrays`]: No longer lints inside static items
[#9466](https://github.com/rust-lang/rust-clippy/pull/9466)
* [`ref_option_ref`]: No longer lints if the inner reference is mutable
[#9684](https://github.com/rust-lang/rust-clippy/pull/9684)
* [`ptr_arg`]: No longer lints if the argument is used as an incomplete trait object
[#9645](https://github.com/rust-lang/rust-clippy/pull/9645)
* [`should_implement_trait`]: Now also works for `default` methods
[#9546](https://github.com/rust-lang/rust-clippy/pull/9546)
### Suggestion Fixes/Improvements
* [`derivable_impls`]: The suggestion is now machine applicable
[#9429](https://github.com/rust-lang/rust-clippy/pull/9429)
* [`match_single_binding`]: The suggestion now handles scrutinies with side effects better
[#9601](https://github.com/rust-lang/rust-clippy/pull/9601)
* [`zero_prefixed_literal`]: Only suggests using octal numbers, if this is possible
[#9652](https://github.com/rust-lang/rust-clippy/pull/9652)
* [`rc_buffer`]: The suggestion is no longer machine applicable to avoid semantic changes
[#9633](https://github.com/rust-lang/rust-clippy/pull/9633)
* [`print_literal`], [`write_literal`], [`uninlined_format_args`]: The suggestion now ignores
comments after the macro call.
[#9586](https://github.com/rust-lang/rust-clippy/pull/9586)
* [`expect_fun_call`]:Improved the suggestion for `format!` calls with captured variables
[#9586](https://github.com/rust-lang/rust-clippy/pull/9586)
* [`nonstandard_macro_braces`]: The suggestion is now machine applicable and will no longer
replace brackets inside the macro argument.
[#9499](https://github.com/rust-lang/rust-clippy/pull/9499)
* [`from_over_into`]: The suggestion is now a machine applicable and contains explanations
[#9649](https://github.com/rust-lang/rust-clippy/pull/9649)
* [`needless_return`]: The automatic suggestion now removes all required semicolons
[#9497](https://github.com/rust-lang/rust-clippy/pull/9497)
* [`to_string_in_format_args`]: The suggestion now keeps parenthesis around values
[#9590](https://github.com/rust-lang/rust-clippy/pull/9590)
* [`manual_assert`]: The suggestion now preserves comments
[#9479](https://github.com/rust-lang/rust-clippy/pull/9479)
* [`redundant_allocation`]: The suggestion applicability is now marked `MaybeIncorrect` to
avoid semantic changes
[#9634](https://github.com/rust-lang/rust-clippy/pull/9634)
* [`assertions_on_result_states`]: The suggestion has been corrected, for cases where the
`assert!` is not in a statement.
[#9453](https://github.com/rust-lang/rust-clippy/pull/9453)
* [`nonminimal_bool`]: The suggestion no longer expands macros
[#9457](https://github.com/rust-lang/rust-clippy/pull/9457)
* [`collapsible_match`]: Now specifies field names, when a struct is destructed
[#9685](https://github.com/rust-lang/rust-clippy/pull/9685)
* [`unnecessary_cast`]: The suggestion now adds parenthesis for negative numbers
[#9577](https://github.com/rust-lang/rust-clippy/pull/9577)
* [`redundant_closure`]: The suggestion now works for `impl FnMut` arguments
[#9556](https://github.com/rust-lang/rust-clippy/pull/9556)
### ICE Fixes
* [`unnecessary_to_owned`]: Avoid ICEs in favor of false negatives if information is missing
[#9505](https://github.com/rust-lang/rust-clippy/pull/9505)
[#10027](https://github.com/rust-lang/rust-clippy/pull/10027)
* [`manual_range_contains`]: No longer ICEs on values behind references
[#9627](https://github.com/rust-lang/rust-clippy/pull/9627)
* [`needless_pass_by_value`]: No longer ICEs on unsized `dyn Fn` arguments
[#9531](https://github.com/rust-lang/rust-clippy/pull/9531)
* `*_interior_mutable_const` lints: no longer ICE on const unions containing `!Freeze` types
[#9539](https://github.com/rust-lang/rust-clippy/pull/9539)
### Others
* Released `rustc_tools_util` for version information on `Crates.io`. (Further adjustments will
not be published as part of this changelog)
## Rust 1.65
Released 2022-11-03
[View all 86 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2022-07-29T01%3A09%3A31Z..2022-09-09T00%3A01%3A54Z+base%3Amaster)
### Important Changes
* Clippy now has an `--explain <LINT>` command to show the lint description in the console
[#8952](https://github.com/rust-lang/rust-clippy/pull/8952)
### New Lints
* [`unused_peekable`]
[#9258](https://github.com/rust-lang/rust-clippy/pull/9258)
* [`collapsible_str_replace`]
[#9269](https://github.com/rust-lang/rust-clippy/pull/9269)
* [`manual_string_new`]
[#9295](https://github.com/rust-lang/rust-clippy/pull/9295)
* [`iter_on_empty_collections`]
[#9187](https://github.com/rust-lang/rust-clippy/pull/9187)
* [`iter_on_single_items`]
[#9187](https://github.com/rust-lang/rust-clippy/pull/9187)
* [`bool_to_int_with_if`]
[#9412](https://github.com/rust-lang/rust-clippy/pull/9412)
* [`multi_assignments`]
[#9379](https://github.com/rust-lang/rust-clippy/pull/9379)
* [`result_large_err`]
[#9373](https://github.com/rust-lang/rust-clippy/pull/9373)
* [`partialeq_to_none`]
[#9288](https://github.com/rust-lang/rust-clippy/pull/9288)
* [`suspicious_to_owned`]
[#8984](https://github.com/rust-lang/rust-clippy/pull/8984)
* [`cast_slice_from_raw_parts`]
[#9247](https://github.com/rust-lang/rust-clippy/pull/9247)
* [`manual_instant_elapsed`]
[#9264](https://github.com/rust-lang/rust-clippy/pull/9264)
### Moves and Deprecations
* Moved [`significant_drop_in_scrutinee`] to `nursery` (now allow-by-default)
[#9302](https://github.com/rust-lang/rust-clippy/pull/9302)
* Rename `logic_bug` to [`overly_complex_bool_expr`]
[#9306](https://github.com/rust-lang/rust-clippy/pull/9306)
* Rename `arithmetic` to [`arithmetic_side_effects`]
[#9443](https://github.com/rust-lang/rust-clippy/pull/9443)
* Moved [`only_used_in_recursion`] to complexity (now warn-by-default)
[#8804](https://github.com/rust-lang/rust-clippy/pull/8804)
* Moved [`assertions_on_result_states`] to restriction (now allow-by-default)
[#9273](https://github.com/rust-lang/rust-clippy/pull/9273)
* Renamed `blacklisted_name` to [`disallowed_names`]
[#8974](https://github.com/rust-lang/rust-clippy/pull/8974)
### Enhancements
* [`option_if_let_else`]: Now also checks for match expressions
[#8696](https://github.com/rust-lang/rust-clippy/pull/8696)
* [`explicit_auto_deref`]: Now lints on implicit returns in closures
[#9126](https://github.com/rust-lang/rust-clippy/pull/9126)
* [`needless_borrow`]: Now considers trait implementations
[#9136](https://github.com/rust-lang/rust-clippy/pull/9136)
* [`suboptimal_flops`], [`imprecise_flops`]: Now lint on constant expressions
[#9404](https://github.com/rust-lang/rust-clippy/pull/9404)
* [`if_let_mutex`]: Now detects mutex behind references and warns about deadlocks
[#9318](https://github.com/rust-lang/rust-clippy/pull/9318)
### False Positive Fixes
* [`unit_arg`] [`default_trait_access`] [`missing_docs_in_private_items`]: No longer
trigger in code generated from proc-macros
[#8694](https://github.com/rust-lang/rust-clippy/pull/8694)
* [`unwrap_used`]: Now lints uses of `unwrap_err`
[#9338](https://github.com/rust-lang/rust-clippy/pull/9338)
* [`expect_used`]: Now lints uses of `expect_err`
[#9338](https://github.com/rust-lang/rust-clippy/pull/9338)
* [`transmute_undefined_repr`]: Now longer lints if the first field is compatible
with the other type
[#9287](https://github.com/rust-lang/rust-clippy/pull/9287)
* [`unnecessary_to_owned`]: No longer lints, if type change cased errors in
the caller function
[#9424](https://github.com/rust-lang/rust-clippy/pull/9424)
* [`match_like_matches_macro`]: No longer lints, if there are comments inside the
match expression
[#9276](https://github.com/rust-lang/rust-clippy/pull/9276)
* [`partialeq_to_none`]: No longer trigger in code generated from macros
[#9389](https://github.com/rust-lang/rust-clippy/pull/9389)
* [`arithmetic_side_effects`]: No longer lints expressions that only use literals
[#9365](https://github.com/rust-lang/rust-clippy/pull/9365)
* [`explicit_auto_deref`]: Now ignores references on block expressions when the type
is `Sized`, on `dyn Trait` returns and when the suggestion is non-trivial
[#9126](https://github.com/rust-lang/rust-clippy/pull/9126)
* [`trait_duplication_in_bounds`]: Now better tracks bounds to avoid false positives
[#9167](https://github.com/rust-lang/rust-clippy/pull/9167)
* [`format_in_format_args`]: Now suggests cases where the result is formatted again
[#9349](https://github.com/rust-lang/rust-clippy/pull/9349)
* [`only_used_in_recursion`]: No longer lints on function without recursions and
takes external functions into account
[#8804](https://github.com/rust-lang/rust-clippy/pull/8804)
* [`missing_const_for_fn`]: No longer lints in proc-macros
[#9308](https://github.com/rust-lang/rust-clippy/pull/9308)
* [`non_ascii_literal`]: Allow non-ascii comments in tests and make sure `#[allow]`
attributes work in tests
[#9327](https://github.com/rust-lang/rust-clippy/pull/9327)
* [`question_mark`]: No longer lint `if let`s with subpatterns
[#9348](https://github.com/rust-lang/rust-clippy/pull/9348)
* [`needless_collect`]: No longer lints in loops
[#8992](https://github.com/rust-lang/rust-clippy/pull/8992)
* [`mut_mutex_lock`]: No longer lints if the mutex is behind an immutable reference
[#9418](https://github.com/rust-lang/rust-clippy/pull/9418)
* [`needless_return`]: Now ignores returns with arguments
[#9381](https://github.com/rust-lang/rust-clippy/pull/9381)
* [`range_plus_one`], [`range_minus_one`]: Now ignores code with macros
[#9446](https://github.com/rust-lang/rust-clippy/pull/9446)
* [`assertions_on_result_states`]: No longer lints on the unit type
[#9273](https://github.com/rust-lang/rust-clippy/pull/9273)
### Suggestion Fixes/Improvements
* [`unwrap_or_else_default`]: Now suggests `unwrap_or_default()` for empty strings
[#9421](https://github.com/rust-lang/rust-clippy/pull/9421)
* [`if_then_some_else_none`]: Now also suggests `bool::then_some`
[#9289](https://github.com/rust-lang/rust-clippy/pull/9289)
* [`redundant_closure_call`]: The suggestion now works for async closures
[#9053](https://github.com/rust-lang/rust-clippy/pull/9053)
* [`suboptimal_flops`]: Now suggests parenthesis when they are required
[#9394](https://github.com/rust-lang/rust-clippy/pull/9394)
* [`case_sensitive_file_extension_comparisons`]: Now suggests `map_or(..)` instead of `map(..).unwrap_or`
[#9341](https://github.com/rust-lang/rust-clippy/pull/9341)
* Deprecated configuration values can now be updated automatically
[#9252](https://github.com/rust-lang/rust-clippy/pull/9252)
* [`or_fun_call`]: Now suggest `Entry::or_default` for `Entry::or_insert(Default::default())`
[#9342](https://github.com/rust-lang/rust-clippy/pull/9342)
* [`unwrap_used`]: Only suggests `expect` if [`expect_used`] is allowed
[#9223](https://github.com/rust-lang/rust-clippy/pull/9223)
### ICE Fixes
* Fix ICE in [`useless_format`] for literals
[#9406](https://github.com/rust-lang/rust-clippy/pull/9406)
* Fix infinite loop in [`vec_init_then_push`]
[#9441](https://github.com/rust-lang/rust-clippy/pull/9441)
* Fix ICE when reading literals with weird proc-macro spans
[#9303](https://github.com/rust-lang/rust-clippy/pull/9303)
## Rust 1.64
Released 2022-09-22
[View all 110 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2022-06-17T21%3A25%3A31Z..2022-07-28T17%3A11%3A18Z+base%3Amaster)
### New Lints
* [`arithmetic_side_effects`]
[#9130](https://github.com/rust-lang/rust-clippy/pull/9130)
* [`invalid_utf8_in_unchecked`]
[#9105](https://github.com/rust-lang/rust-clippy/pull/9105)
* [`assertions_on_result_states`]
[#9225](https://github.com/rust-lang/rust-clippy/pull/9225)
* [`manual_find`]
[#8649](https://github.com/rust-lang/rust-clippy/pull/8649)
* [`manual_retain`]
[#8972](https://github.com/rust-lang/rust-clippy/pull/8972)
* [`default_instead_of_iter_empty`]
[#8989](https://github.com/rust-lang/rust-clippy/pull/8989)
* [`manual_rem_euclid`]
[#9031](https://github.com/rust-lang/rust-clippy/pull/9031)
* [`obfuscated_if_else`]
[#9148](https://github.com/rust-lang/rust-clippy/pull/9148)
* [`std_instead_of_core`]
[#9103](https://github.com/rust-lang/rust-clippy/pull/9103)
* [`std_instead_of_alloc`]
[#9103](https://github.com/rust-lang/rust-clippy/pull/9103)
* [`alloc_instead_of_core`]
[#9103](https://github.com/rust-lang/rust-clippy/pull/9103)
* [`explicit_auto_deref`]
[#8355](https://github.com/rust-lang/rust-clippy/pull/8355)
### Moves and Deprecations
* Moved [`format_push_string`] to `restriction` (now allow-by-default)
[#9161](https://github.com/rust-lang/rust-clippy/pull/9161)
### Enhancements
* [`significant_drop_in_scrutinee`]: Now gives more context in the lint message
[#8981](https://github.com/rust-lang/rust-clippy/pull/8981)
* [`single_match`], [`single_match_else`]: Now catches more `Option` cases
[#8985](https://github.com/rust-lang/rust-clippy/pull/8985)
* [`unused_async`]: Now works for async methods
[#9025](https://github.com/rust-lang/rust-clippy/pull/9025)
* [`manual_filter_map`], [`manual_find_map`]: Now lint more expressions
[#8958](https://github.com/rust-lang/rust-clippy/pull/8958)
* [`question_mark`]: Now works for simple `if let` expressions
[#8356](https://github.com/rust-lang/rust-clippy/pull/8356)
* [`undocumented_unsafe_blocks`]: Now finds comments before the start of closures
[#9117](https://github.com/rust-lang/rust-clippy/pull/9117)
* [`trait_duplication_in_bounds`]: Now catches duplicate bounds in where clauses
[#8703](https://github.com/rust-lang/rust-clippy/pull/8703)
* [`shadow_reuse`], [`shadow_same`], [`shadow_unrelated`]: Now lint in const blocks
[#9124](https://github.com/rust-lang/rust-clippy/pull/9124)
* [`slow_vector_initialization`]: Now detects cases with `vec.capacity()`
[#8953](https://github.com/rust-lang/rust-clippy/pull/8953)
* [`unused_self`]: Now respects the `avoid-breaking-exported-api` config option
[#9199](https://github.com/rust-lang/rust-clippy/pull/9199)
* [`box_collection`]: Now supports all std collections
[#9170](https://github.com/rust-lang/rust-clippy/pull/9170)
### False Positive Fixes
* [`significant_drop_in_scrutinee`]: Now ignores calls to `IntoIterator::into_iter`
[#9140](https://github.com/rust-lang/rust-clippy/pull/9140)
* [`while_let_loop`]: Now ignores cases when the significant drop order would change
[#8981](https://github.com/rust-lang/rust-clippy/pull/8981)
* [`branches_sharing_code`]: Now ignores cases where moved variables have a significant
drop or variable modifications can affect the conditions
[#9138](https://github.com/rust-lang/rust-clippy/pull/9138)
* [`let_underscore_lock`]: Now ignores bindings that aren't locked
[#8990](https://github.com/rust-lang/rust-clippy/pull/8990)
* [`trivially_copy_pass_by_ref`]: Now tracks lifetimes and ignores cases where unsafe
pointers are used
[#8639](https://github.com/rust-lang/rust-clippy/pull/8639)
* [`let_unit_value`]: No longer ignores `#[allow]` attributes on the value
[#9082](https://github.com/rust-lang/rust-clippy/pull/9082)
* [`declare_interior_mutable_const`]: Now ignores the `thread_local!` macro
[#9015](https://github.com/rust-lang/rust-clippy/pull/9015)
* [`if_same_then_else`]: Now ignores branches with `todo!` and `unimplemented!`
[#9006](https://github.com/rust-lang/rust-clippy/pull/9006)
* [`enum_variant_names`]: Now ignores names with `_` prefixes
[#9032](https://github.com/rust-lang/rust-clippy/pull/9032)
* [`let_unit_value`]: Now ignores cases, where the unit type is manually specified
[#9056](https://github.com/rust-lang/rust-clippy/pull/9056)
* [`match_same_arms`]: Now ignores branches with `todo!`
[#9207](https://github.com/rust-lang/rust-clippy/pull/9207)
* [`assign_op_pattern`]: Ignores cases that break borrowing rules
[#9214](https://github.com/rust-lang/rust-clippy/pull/9214)
* [`extra_unused_lifetimes`]: No longer triggers in derive macros
[#9037](https://github.com/rust-lang/rust-clippy/pull/9037)
* [`mismatching_type_param_order`]: Now ignores complicated generic parameters
[#9146](https://github.com/rust-lang/rust-clippy/pull/9146)
* [`equatable_if_let`]: No longer lints in macros
[#9074](https://github.com/rust-lang/rust-clippy/pull/9074)
* [`new_without_default`]: Now ignores generics and lifetime parameters on `fn new`
[#9115](https://github.com/rust-lang/rust-clippy/pull/9115)
* [`needless_borrow`]: Now ignores cases that result in the execution of different traits
[#9096](https://github.com/rust-lang/rust-clippy/pull/9096)
* [`declare_interior_mutable_const`]: No longer triggers in thread-local initializers
[#9246](https://github.com/rust-lang/rust-clippy/pull/9246)
### Suggestion Fixes/Improvements
* [`type_repetition_in_bounds`]: The suggestion now works with maybe bounds
[#9132](https://github.com/rust-lang/rust-clippy/pull/9132)
* [`transmute_ptr_to_ref`]: Now suggests `pointer::cast` when possible
[#8939](https://github.com/rust-lang/rust-clippy/pull/8939)
* [`useless_format`]: Now suggests the correct variable name
[#9237](https://github.com/rust-lang/rust-clippy/pull/9237)
* [`or_fun_call`]: The lint emission will now only span over the `unwrap_or` call
[#9144](https://github.com/rust-lang/rust-clippy/pull/9144)
* [`neg_multiply`]: Now suggests adding parentheses around suggestion if needed
[#9026](https://github.com/rust-lang/rust-clippy/pull/9026)
* [`unnecessary_lazy_evaluations`]: Now suggest for `bool::then_some` for lazy evaluation
[#9099](https://github.com/rust-lang/rust-clippy/pull/9099)
* [`manual_flatten`]: Improved message for long code snippets
[#9156](https://github.com/rust-lang/rust-clippy/pull/9156)
* [`explicit_counter_loop`]: The suggestion is now machine applicable
[#9149](https://github.com/rust-lang/rust-clippy/pull/9149)
* [`needless_borrow`]: Now keeps parentheses around fields, when needed
[#9210](https://github.com/rust-lang/rust-clippy/pull/9210)
* [`while_let_on_iterator`]: The suggestion now works in `FnOnce` closures
[#9134](https://github.com/rust-lang/rust-clippy/pull/9134)
### ICE Fixes
* Fix ICEs related to `#![feature(generic_const_exprs)]` usage
[#9241](https://github.com/rust-lang/rust-clippy/pull/9241)
* Fix ICEs related to reference lints
[#9093](https://github.com/rust-lang/rust-clippy/pull/9093)
* [`question_mark`]: Fix ICE on zero field tuple structs
[#9244](https://github.com/rust-lang/rust-clippy/pull/9244)
### Documentation Improvements
* [`needless_option_take`]: Now includes a "What it does" and "Why is this bad?" section.
[#9022](https://github.com/rust-lang/rust-clippy/pull/9022)
### Others
* Using `--cap-lints=allow` and only `--force-warn`ing some will now work with Clippy's driver
[#9036](https://github.com/rust-lang/rust-clippy/pull/9036)
* Clippy now tries to read the `rust-version` from `Cargo.toml` to identify the
minimum supported rust version
[#8774](https://github.com/rust-lang/rust-clippy/pull/8774)
## Rust 1.63
Released 2022-08-11
[View all 91 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2022-05-05T17%3A24%3A22Z..2022-06-16T14%3A24%3A48Z+base%3Amaster)
### New Lints
* [`borrow_deref_ref`]
[#7930](https://github.com/rust-lang/rust-clippy/pull/7930)
* [`doc_link_with_quotes`]
[#8385](https://github.com/rust-lang/rust-clippy/pull/8385)
* [`no_effect_replace`]
[#8754](https://github.com/rust-lang/rust-clippy/pull/8754)
* [`rc_clone_in_vec_init`]
[#8769](https://github.com/rust-lang/rust-clippy/pull/8769)
* [`derive_partial_eq_without_eq`]
[#8796](https://github.com/rust-lang/rust-clippy/pull/8796)
* [`mismatching_type_param_order`]
[#8831](https://github.com/rust-lang/rust-clippy/pull/8831)
* [`duplicate_mod`] [#8832](https://github.com/rust-lang/rust-clippy/pull/8832)
* [`unused_rounding`]
[#8866](https://github.com/rust-lang/rust-clippy/pull/8866)
* [`get_first`] [#8882](https://github.com/rust-lang/rust-clippy/pull/8882)
* [`swap_ptr_to_ref`]
[#8916](https://github.com/rust-lang/rust-clippy/pull/8916)
* [`almost_complete_letter_range`]
[#8918](https://github.com/rust-lang/rust-clippy/pull/8918)
* [`needless_parens_on_range_literals`]
[#8933](https://github.com/rust-lang/rust-clippy/pull/8933)
* [`as_underscore`] [#8934](https://github.com/rust-lang/rust-clippy/pull/8934)
### Moves and Deprecations
* Rename `eval_order_dependence` to [`mixed_read_write_in_expression`], move to
`nursery` [#8621](https://github.com/rust-lang/rust-clippy/pull/8621)
### Enhancements
* [`undocumented_unsafe_blocks`]: Now also lints on unsafe trait implementations
[#8761](https://github.com/rust-lang/rust-clippy/pull/8761)
* [`empty_line_after_outer_attr`]: Now also lints on argumentless macros
[#8790](https://github.com/rust-lang/rust-clippy/pull/8790)
* [`expect_used`]: Now can be disabled in tests with the `allow-expect-in-tests`
option [#8802](https://github.com/rust-lang/rust-clippy/pull/8802)
* [`unwrap_used`]: Now can be disabled in tests with the `allow-unwrap-in-tests`
option [#8802](https://github.com/rust-lang/rust-clippy/pull/8802)
* [`disallowed_methods`]: Now also lints indirect usages
[#8852](https://github.com/rust-lang/rust-clippy/pull/8852)
* [`get_last_with_len`]: Now also lints `VecDeque` and any deref to slice
[#8862](https://github.com/rust-lang/rust-clippy/pull/8862)
* [`manual_range_contains`]: Now also lints on chains of `&&` and `||`
[#8884](https://github.com/rust-lang/rust-clippy/pull/8884)
* [`rc_clone_in_vec_init`]: Now also lints on `Weak`
[#8885](https://github.com/rust-lang/rust-clippy/pull/8885)
* [`dbg_macro`]: Introduce `allow-dbg-in-tests` config option
[#8897](https://github.com/rust-lang/rust-clippy/pull/8897)
* [`use_self`]: Now also lints on `TupleStruct` and `Struct` patterns
[#8899](https://github.com/rust-lang/rust-clippy/pull/8899)
* [`manual_find_map`] and [`manual_filter_map`]: Now also lints on more complex
method chains inside `map`
[#8930](https://github.com/rust-lang/rust-clippy/pull/8930)
* [`needless_return`]: Now also lints on macro expressions in return statements
[#8932](https://github.com/rust-lang/rust-clippy/pull/8932)
* [`doc_markdown`]: Users can now indicate, that the `doc-valid-idents` config
should extend the default and not replace it
[#8944](https://github.com/rust-lang/rust-clippy/pull/8944)
* [`disallowed_names`]: Users can now indicate, that the `disallowed-names`
config should extend the default and not replace it
[#8944](https://github.com/rust-lang/rust-clippy/pull/8944)
* [`never_loop`]: Now checks for `continue` in struct expression
[#9002](https://github.com/rust-lang/rust-clippy/pull/9002)
### False Positive Fixes
* [`useless_transmute`]: No longer lints on types with erased regions
[#8564](https://github.com/rust-lang/rust-clippy/pull/8564)
* [`vec_init_then_push`]: No longer lints when further extended
[#8699](https://github.com/rust-lang/rust-clippy/pull/8699)
* [`cmp_owned`]: No longer lints on `From::from` for `Copy` types
[#8807](https://github.com/rust-lang/rust-clippy/pull/8807)
* [`redundant_allocation`]: No longer lints on fat pointers that would become
thin pointers [#8813](https://github.com/rust-lang/rust-clippy/pull/8813)
* [`derive_partial_eq_without_eq`]:
* Handle differing predicates applied by `#[derive(PartialEq)]` and
`#[derive(Eq)]`
[#8869](https://github.com/rust-lang/rust-clippy/pull/8869)
* No longer lints on non-public types and better handles generics
[#8950](https://github.com/rust-lang/rust-clippy/pull/8950)
* [`empty_line_after_outer_attr`]: No longer lints empty lines in inner
string values [#8892](https://github.com/rust-lang/rust-clippy/pull/8892)
* [`branches_sharing_code`]: No longer lints when using different binding names
[#8901](https://github.com/rust-lang/rust-clippy/pull/8901)
* [`significant_drop_in_scrutinee`]: No longer lints on Try `?` and `await`
desugared expressions [#8902](https://github.com/rust-lang/rust-clippy/pull/8902)
* [`checked_conversions`]: No longer lints in `const` contexts
[#8907](https://github.com/rust-lang/rust-clippy/pull/8907)
* [`iter_overeager_cloned`]: No longer lints on `.cloned().flatten()` when
`T::Item` doesn't implement `IntoIterator`
[#8960](https://github.com/rust-lang/rust-clippy/pull/8960)
### Suggestion Fixes/Improvements
* [`vec_init_then_push`]: Suggest to remove `mut` binding when possible
[#8699](https://github.com/rust-lang/rust-clippy/pull/8699)
* [`manual_range_contains`]: Fix suggestion for integers with different signs
[#8763](https://github.com/rust-lang/rust-clippy/pull/8763)
* [`identity_op`]: Add parenthesis to suggestions where required
[#8786](https://github.com/rust-lang/rust-clippy/pull/8786)
* [`cast_lossless`]: No longer gives wrong suggestion on `usize`/`isize`->`f64`
[#8778](https://github.com/rust-lang/rust-clippy/pull/8778)
* [`rc_clone_in_vec_init`]: Add suggestion
[#8814](https://github.com/rust-lang/rust-clippy/pull/8814)
* The "unknown field" error messages for config files now wraps the field names
[#8823](https://github.com/rust-lang/rust-clippy/pull/8823)
* [`cast_abs_to_unsigned`]: Do not remove cast if it's required
[#8876](https://github.com/rust-lang/rust-clippy/pull/8876)
* [`significant_drop_in_scrutinee`]: Improve lint message for types that are not
references and not trivially clone-able
[#8902](https://github.com/rust-lang/rust-clippy/pull/8902)
* [`for_loops_over_fallibles`]: Now suggests the correct variant of `iter()`,
`iter_mut()` or `into_iter()`
[#8941](https://github.com/rust-lang/rust-clippy/pull/8941)
### ICE Fixes
* Fix ICE in [`let_unit_value`] when calling a `static`/`const` callable type
[#8835](https://github.com/rust-lang/rust-clippy/pull/8835)
* Fix ICEs on callable `static`/`const`s
[#8896](https://github.com/rust-lang/rust-clippy/pull/8896)
* [`needless_late_init`]
[#8912](https://github.com/rust-lang/rust-clippy/pull/8912)
* Fix ICE in shadow lints
[#8913](https://github.com/rust-lang/rust-clippy/pull/8913)
### Documentation Improvements
* Clippy has a [Book](https://doc.rust-lang.org/nightly/clippy/) now!
[#7359](https://github.com/rust-lang/rust-clippy/pull/7359)
* Add a *copy lint name*-button to Clippy's lint list
[#8839](https://github.com/rust-lang/rust-clippy/pull/8839)
* Display past names of renamed lints on Clippy's lint list
[#8843](https://github.com/rust-lang/rust-clippy/pull/8843)
* Add the ability to show the lint output in the lint list
[#8947](https://github.com/rust-lang/rust-clippy/pull/8947)
## Rust 1.62
Released 2022-06-30
[View all 90 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2022-03-25T17%3A22%3A30Z..2022-05-05T13%3A29%3A44Z+base%3Amaster)
### New Lints
* [`large_include_file`]
[#8727](https://github.com/rust-lang/rust-clippy/pull/8727)
* [`cast_abs_to_unsigned`]
[#8635](https://github.com/rust-lang/rust-clippy/pull/8635)
* [`err_expect`]
[#8606](https://github.com/rust-lang/rust-clippy/pull/8606)
* [`unnecessary_owned_empty_strings`]
[#8660](https://github.com/rust-lang/rust-clippy/pull/8660)
* [`empty_structs_with_brackets`]
[#8594](https://github.com/rust-lang/rust-clippy/pull/8594)
* [`crate_in_macro_def`]
[#8576](https://github.com/rust-lang/rust-clippy/pull/8576)
* [`needless_option_take`]
[#8665](https://github.com/rust-lang/rust-clippy/pull/8665)
* [`bytes_count_to_len`]
[#8711](https://github.com/rust-lang/rust-clippy/pull/8711)
* [`is_digit_ascii_radix`]
[#8624](https://github.com/rust-lang/rust-clippy/pull/8624)
* [`await_holding_invalid_type`]
[#8707](https://github.com/rust-lang/rust-clippy/pull/8707)
* [`trim_split_whitespace`]
[#8575](https://github.com/rust-lang/rust-clippy/pull/8575)
* [`pub_use`]
[#8670](https://github.com/rust-lang/rust-clippy/pull/8670)
* [`format_push_string`]
[#8626](https://github.com/rust-lang/rust-clippy/pull/8626)
* [`empty_drop`]
[#8571](https://github.com/rust-lang/rust-clippy/pull/8571)
* [`drop_non_drop`]
[#8630](https://github.com/rust-lang/rust-clippy/pull/8630)
* [`forget_non_drop`]
[#8630](https://github.com/rust-lang/rust-clippy/pull/8630)
### Moves and Deprecations
* Move [`only_used_in_recursion`] to `nursery` (now allow-by-default)
[#8783](https://github.com/rust-lang/rust-clippy/pull/8783)
* Move [`stable_sort_primitive`] to `pedantic` (now allow-by-default)
[#8716](https://github.com/rust-lang/rust-clippy/pull/8716)
### Enhancements
* Remove overlap between [`manual_split_once`] and [`needless_splitn`]
[#8631](https://github.com/rust-lang/rust-clippy/pull/8631)
* [`map_identity`]: Now checks for needless `map_err`
[#8487](https://github.com/rust-lang/rust-clippy/pull/8487)
* [`extra_unused_lifetimes`]: Now checks for impl lifetimes
[#8737](https://github.com/rust-lang/rust-clippy/pull/8737)
* [`cast_possible_truncation`]: Now catches more cases with larger shift or divide operations
[#8687](https://github.com/rust-lang/rust-clippy/pull/8687)
* [`identity_op`]: Now checks for modulo expressions
[#8519](https://github.com/rust-lang/rust-clippy/pull/8519)
* [`panic`]: No longer lint in constant context
[#8592](https://github.com/rust-lang/rust-clippy/pull/8592)
* [`manual_split_once`]: Now lints manual iteration of `splitn`
[#8717](https://github.com/rust-lang/rust-clippy/pull/8717)
* [`self_named_module_files`], [`mod_module_files`]: Now handle relative module paths
[#8611](https://github.com/rust-lang/rust-clippy/pull/8611)
* [`unsound_collection_transmute`]: Now has better size and alignment checks
[#8648](https://github.com/rust-lang/rust-clippy/pull/8648)
* [`unnested_or_patterns`]: Ignore cases, where the suggestion would be longer
[#8619](https://github.com/rust-lang/rust-clippy/pull/8619)
### False Positive Fixes
* [`rest_pat_in_fully_bound_structs`]: Now ignores structs marked with `#[non_exhaustive]`
[#8690](https://github.com/rust-lang/rust-clippy/pull/8690)
* [`needless_late_init`]: No longer lints `if let` statements, `let mut` bindings or instances that
changes the drop order significantly
[#8617](https://github.com/rust-lang/rust-clippy/pull/8617)
* [`unnecessary_cast`]: No longer lints to casts to aliased or non-primitive types
[#8596](https://github.com/rust-lang/rust-clippy/pull/8596)
* [`init_numbered_fields`]: No longer lints type aliases
[#8780](https://github.com/rust-lang/rust-clippy/pull/8780)
* [`needless_option_as_deref`]: No longer lints for `as_deref_mut` on `Option` values that can't be moved
[#8646](https://github.com/rust-lang/rust-clippy/pull/8646)
* [`mistyped_literal_suffixes`]: Now ignores float literals without an exponent
[#8742](https://github.com/rust-lang/rust-clippy/pull/8742)
* [`undocumented_unsafe_blocks`]: Now ignores unsafe blocks from proc-macros and works better for sub-expressions
[#8450](https://github.com/rust-lang/rust-clippy/pull/8450)
* [`same_functions_in_if_condition`]: Now allows different constants, even if they have the same value
[#8673](https://github.com/rust-lang/rust-clippy/pull/8673)
* [`needless_match`]: Now checks for more complex types and ignores type coercion
[#8549](https://github.com/rust-lang/rust-clippy/pull/8549)
* [`assertions_on_constants`]: Now ignores constants from `cfg!` macros
[#8614](https://github.com/rust-lang/rust-clippy/pull/8614)
* [`indexing_slicing`]: Fix false positives with constant indices in
[#8588](https://github.com/rust-lang/rust-clippy/pull/8588)
* [`iter_with_drain`]: Now ignores iterator references
[#8668](https://github.com/rust-lang/rust-clippy/pull/8668)
* [`useless_attribute`]: Now allows [`redundant_pub_crate`] on `use` items
[#8743](https://github.com/rust-lang/rust-clippy/pull/8743)
* [`cast_ptr_alignment`]: Now ignores expressions, when used for unaligned reads and writes
[#8632](https://github.com/rust-lang/rust-clippy/pull/8632)
* [`wrong_self_convention`]: Now allows `&mut self` and no self as arguments for `is_*` methods
[#8738](https://github.com/rust-lang/rust-clippy/pull/8738)
* [`mut_from_ref`]: Only lint in unsafe code
[#8647](https://github.com/rust-lang/rust-clippy/pull/8647)
* [`redundant_pub_crate`]: Now allows macro exports
[#8736](https://github.com/rust-lang/rust-clippy/pull/8736)
* [`needless_match`]: Ignores cases where the else block expression is different
[#8700](https://github.com/rust-lang/rust-clippy/pull/8700)
* [`transmute_int_to_char`]: Now allows transmutations in `const` code
[#8610](https://github.com/rust-lang/rust-clippy/pull/8610)
* [`manual_non_exhaustive`]: Ignores cases, where the enum value is used
[#8645](https://github.com/rust-lang/rust-clippy/pull/8645)
* [`redundant_closure`]: Now ignores coerced closure
[#8431](https://github.com/rust-lang/rust-clippy/pull/8431)
* [`identity_op`]: Is now ignored in cases where extra brackets would be needed
[#8730](https://github.com/rust-lang/rust-clippy/pull/8730)
* [`let_unit_value`]: Now ignores cases which are used for type inference
[#8563](https://github.com/rust-lang/rust-clippy/pull/8563)
### Suggestion Fixes/Improvements
* [`manual_split_once`]: Fixed incorrect suggestions for single result accesses
[#8631](https://github.com/rust-lang/rust-clippy/pull/8631)
* [`bytes_nth`]: Fix typos in the diagnostic message
[#8403](https://github.com/rust-lang/rust-clippy/pull/8403)
* [`mistyped_literal_suffixes`]: Now suggests the correct integer types
[#8742](https://github.com/rust-lang/rust-clippy/pull/8742)
* [`unnecessary_to_owned`]: Fixed suggestion based on the configured msrv
[#8692](https://github.com/rust-lang/rust-clippy/pull/8692)
* [`single_element_loop`]: Improve lint for Edition 2021 arrays
[#8616](https://github.com/rust-lang/rust-clippy/pull/8616)
* [`manual_bits`]: Now includes a cast for proper type conversion, when needed
[#8677](https://github.com/rust-lang/rust-clippy/pull/8677)
* [`option_map_unit_fn`], [`result_map_unit_fn`]: Fix some incorrect suggestions
[#8584](https://github.com/rust-lang/rust-clippy/pull/8584)
* [`collapsible_else_if`]: Add whitespace in suggestion
[#8729](https://github.com/rust-lang/rust-clippy/pull/8729)
* [`transmute_bytes_to_str`]: Now suggest `from_utf8_unchecked` in `const` context
[#8612](https://github.com/rust-lang/rust-clippy/pull/8612)
* [`map_clone`]: Improve message and suggestion based on the msrv
[#8688](https://github.com/rust-lang/rust-clippy/pull/8688)
* [`needless_late_init`]: Now shows the `let` statement where it was first initialized
[#8779](https://github.com/rust-lang/rust-clippy/pull/8779)
### ICE Fixes
* [`only_used_in_recursion`]
[#8691](https://github.com/rust-lang/rust-clippy/pull/8691)
* [`cast_slice_different_sizes`]
[#8720](https://github.com/rust-lang/rust-clippy/pull/8720)
* [`iter_overeager_cloned`]
[#8602](https://github.com/rust-lang/rust-clippy/pull/8602)
* [`undocumented_unsafe_blocks`]
[#8686](https://github.com/rust-lang/rust-clippy/pull/8686)
## Rust 1.61
Released 2022-05-19
[View all 60 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2022-02-11T16%3A54%3A41Z..2022-03-24T13%3A42%3A25Z+base%3Amaster)
### New Lints
* [`only_used_in_recursion`]
[#8422](https://github.com/rust-lang/rust-clippy/pull/8422)
* [`cast_enum_truncation`]
[#8381](https://github.com/rust-lang/rust-clippy/pull/8381)
* [`missing_spin_loop`]
[#8174](https://github.com/rust-lang/rust-clippy/pull/8174)
* [`deref_by_slicing`]
[#8218](https://github.com/rust-lang/rust-clippy/pull/8218)
* [`needless_match`]
[#8471](https://github.com/rust-lang/rust-clippy/pull/8471)
* [`allow_attributes_without_reason`] (Requires `#![feature(lint_reasons)]`)
[#8504](https://github.com/rust-lang/rust-clippy/pull/8504)
* [`print_in_format_impl`]
[#8253](https://github.com/rust-lang/rust-clippy/pull/8253)
* [`unnecessary_find_map`]
[#8489](https://github.com/rust-lang/rust-clippy/pull/8489)
* [`or_then_unwrap`]
[#8561](https://github.com/rust-lang/rust-clippy/pull/8561)
* [`unnecessary_join`]
[#8579](https://github.com/rust-lang/rust-clippy/pull/8579)
* [`iter_with_drain`]
[#8483](https://github.com/rust-lang/rust-clippy/pull/8483)
* [`cast_enum_constructor`]
[#8562](https://github.com/rust-lang/rust-clippy/pull/8562)
* [`cast_slice_different_sizes`]
[#8445](https://github.com/rust-lang/rust-clippy/pull/8445)
### Moves and Deprecations
* Moved [`transmute_undefined_repr`] to `nursery` (now allow-by-default)
[#8432](https://github.com/rust-lang/rust-clippy/pull/8432)
* Moved [`try_err`] to `restriction`
[#8544](https://github.com/rust-lang/rust-clippy/pull/8544)
* Move [`iter_with_drain`] to `nursery`
[#8541](https://github.com/rust-lang/rust-clippy/pull/8541)
* Renamed `to_string_in_display` to [`recursive_format_impl`]
[#8188](https://github.com/rust-lang/rust-clippy/pull/8188)
### Enhancements
* [`dbg_macro`]: The lint level can now be set with crate attributes and works inside macros
[#8411](https://github.com/rust-lang/rust-clippy/pull/8411)
* [`ptr_as_ptr`]: Now works inside macros
[#8442](https://github.com/rust-lang/rust-clippy/pull/8442)
* [`use_self`]: Now works for variants in match expressions
[#8456](https://github.com/rust-lang/rust-clippy/pull/8456)
* [`await_holding_lock`]: Now lints for `parking_lot::{Mutex, RwLock}`
[#8419](https://github.com/rust-lang/rust-clippy/pull/8419)
* [`recursive_format_impl`]: Now checks for format calls on `self`
[#8188](https://github.com/rust-lang/rust-clippy/pull/8188)
### False Positive Fixes
* [`new_without_default`]: No longer lints for `new()` methods with `#[doc(hidden)]`
[#8472](https://github.com/rust-lang/rust-clippy/pull/8472)
* [`transmute_undefined_repr`]: No longer lints for single field structs with `#[repr(C)]`,
generic parameters, wide pointers, unions, tuples and allow several forms of type erasure
[#8425](https://github.com/rust-lang/rust-clippy/pull/8425)
[#8553](https://github.com/rust-lang/rust-clippy/pull/8553)
[#8440](https://github.com/rust-lang/rust-clippy/pull/8440)
[#8547](https://github.com/rust-lang/rust-clippy/pull/8547)
* [`match_single_binding`], [`match_same_arms`], [`match_as_ref`], [`match_bool`]: No longer
lint `match` expressions with `cfg`ed arms
[#8443](https://github.com/rust-lang/rust-clippy/pull/8443)
* [`single_component_path_imports`]: No longer lint on macros
[#8537](https://github.com/rust-lang/rust-clippy/pull/8537)
* [`ptr_arg`]: Allow `&mut` arguments for `Cow<_>`
[#8552](https://github.com/rust-lang/rust-clippy/pull/8552)
* [`needless_borrow`]: No longer lints for method calls
[#8441](https://github.com/rust-lang/rust-clippy/pull/8441)
* [`match_same_arms`]: Now ensures that interposing arm patterns don't overlap
[#8232](https://github.com/rust-lang/rust-clippy/pull/8232)
* [`default_trait_access`]: Now allows `Default::default` in update expressions
[#8433](https://github.com/rust-lang/rust-clippy/pull/8433)
### Suggestion Fixes/Improvements
* [`redundant_slicing`]: Fixed suggestion for a method calls
[#8218](https://github.com/rust-lang/rust-clippy/pull/8218)
* [`map_flatten`]: Long suggestions will now be split up into two help messages
[#8520](https://github.com/rust-lang/rust-clippy/pull/8520)
* [`unnecessary_lazy_evaluations`]: Now shows suggestions for longer code snippets
[#8543](https://github.com/rust-lang/rust-clippy/pull/8543)
* [`unnecessary_sort_by`]: Now suggests `Reverse` including the path
[#8462](https://github.com/rust-lang/rust-clippy/pull/8462)
* [`search_is_some`]: More suggestions are now `MachineApplicable`
[#8536](https://github.com/rust-lang/rust-clippy/pull/8536)
### Documentation Improvements
* [`new_without_default`]: Document `pub` requirement for the struct and fields
[#8429](https://github.com/rust-lang/rust-clippy/pull/8429)
## Rust 1.60
Released 2022-04-07
[View all 73 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2021-12-31T17%3A53%3A37Z..2022-02-10T17%3A31%3A37Z+base%3Amaster)
### New Lints
* [`single_char_lifetime_names`]
[#8236](https://github.com/rust-lang/rust-clippy/pull/8236)
* [`iter_overeager_cloned`]
[#8203](https://github.com/rust-lang/rust-clippy/pull/8203)
* [`transmute_undefined_repr`]
[#8398](https://github.com/rust-lang/rust-clippy/pull/8398)
* [`default_union_representation`]
[#8289](https://github.com/rust-lang/rust-clippy/pull/8289)
* [`manual_bits`]
[#8213](https://github.com/rust-lang/rust-clippy/pull/8213)
* [`borrow_as_ptr`]
[#8210](https://github.com/rust-lang/rust-clippy/pull/8210)
### Moves and Deprecations
* Moved [`disallowed_methods`] and [`disallowed_types`] to `style` (now warn-by-default)
[#8261](https://github.com/rust-lang/rust-clippy/pull/8261)
* Rename `ref_in_deref` to [`needless_borrow`]
[#8217](https://github.com/rust-lang/rust-clippy/pull/8217)
* Moved [`mutex_atomic`] to `nursery` (now allow-by-default)
[#8260](https://github.com/rust-lang/rust-clippy/pull/8260)
### Enhancements
* [`ptr_arg`]: Now takes the argument usage into account and lints for mutable references
[#8271](https://github.com/rust-lang/rust-clippy/pull/8271)
* [`unused_io_amount`]: Now supports async read and write traits
[#8179](https://github.com/rust-lang/rust-clippy/pull/8179)
* [`while_let_on_iterator`]: Improved detection to catch more cases
[#8221](https://github.com/rust-lang/rust-clippy/pull/8221)
* [`trait_duplication_in_bounds`]: Now covers trait functions with `Self` bounds
[#8252](https://github.com/rust-lang/rust-clippy/pull/8252)
* [`unwrap_used`]: Now works for `.get(i).unwrap()` and `.get_mut(i).unwrap()`
[#8372](https://github.com/rust-lang/rust-clippy/pull/8372)
* [`map_clone`]: The suggestion takes `msrv` into account
[#8280](https://github.com/rust-lang/rust-clippy/pull/8280)
* [`manual_bits`] and [`borrow_as_ptr`]: Now track the `clippy::msrv` attribute
[#8280](https://github.com/rust-lang/rust-clippy/pull/8280)
* [`disallowed_methods`]: Now works for methods on primitive types
[#8112](https://github.com/rust-lang/rust-clippy/pull/8112)
* [`not_unsafe_ptr_arg_deref`]: Now works for type aliases
[#8273](https://github.com/rust-lang/rust-clippy/pull/8273)
* [`needless_question_mark`]: Now works for async functions
[#8311](https://github.com/rust-lang/rust-clippy/pull/8311)
* [`iter_not_returning_iterator`]: Now handles type projections
[#8228](https://github.com/rust-lang/rust-clippy/pull/8228)
* [`wrong_self_convention`]: Now detects wrong `self` references in more cases
[#8208](https://github.com/rust-lang/rust-clippy/pull/8208)
* [`single_match`]: Now works for `match` statements with tuples
[#8322](https://github.com/rust-lang/rust-clippy/pull/8322)
### False Positive Fixes
* [`erasing_op`]: No longer triggers if the output type changes
[#8204](https://github.com/rust-lang/rust-clippy/pull/8204)
* [`if_same_then_else`]: No longer triggers for `if let` statements
[#8297](https://github.com/rust-lang/rust-clippy/pull/8297)
* [`manual_memcpy`]: No longer lints on `VecDeque`
[#8226](https://github.com/rust-lang/rust-clippy/pull/8226)
* [`trait_duplication_in_bounds`]: Now takes path segments into account
[#8315](https://github.com/rust-lang/rust-clippy/pull/8315)
* [`deref_addrof`]: No longer lints when the dereference or borrow occurs in different a context
[#8268](https://github.com/rust-lang/rust-clippy/pull/8268)
* [`type_repetition_in_bounds`]: Now checks for full equality to prevent false positives
[#8224](https://github.com/rust-lang/rust-clippy/pull/8224)
* [`ptr_arg`]: No longer lint for mutable references in traits
[#8369](https://github.com/rust-lang/rust-clippy/pull/8369)
* [`implicit_clone`]: No longer lints for double references
[#8231](https://github.com/rust-lang/rust-clippy/pull/8231)
* [`needless_lifetimes`]: No longer lints lifetimes for explicit `self` types
[#8278](https://github.com/rust-lang/rust-clippy/pull/8278)
* [`op_ref`]: No longer lints in `BinOp` impl if that can cause recursion
[#8298](https://github.com/rust-lang/rust-clippy/pull/8298)
* [`enum_variant_names`]: No longer triggers for empty variant names
[#8329](https://github.com/rust-lang/rust-clippy/pull/8329)
* [`redundant_closure`]: No longer lints for `Arc<T>` or `Rc<T>`
[#8193](https://github.com/rust-lang/rust-clippy/pull/8193)
* [`iter_not_returning_iterator`]: No longer lints on trait implementations but therefore on trait definitions
[#8228](https://github.com/rust-lang/rust-clippy/pull/8228)
* [`single_match`]: No longer lints on exhaustive enum patterns without a wildcard
[#8322](https://github.com/rust-lang/rust-clippy/pull/8322)
* [`manual_swap`]: No longer lints on cases that involve automatic dereferences
[#8220](https://github.com/rust-lang/rust-clippy/pull/8220)
* [`useless_format`]: Now works for implicit named arguments
[#8295](https://github.com/rust-lang/rust-clippy/pull/8295)
### Suggestion Fixes/Improvements
* [`needless_borrow`]: Prevent mutable borrows being moved and suggest removing the borrow on method calls
[#8217](https://github.com/rust-lang/rust-clippy/pull/8217)
* [`chars_next_cmp`]: Correctly escapes the suggestion
[#8376](https://github.com/rust-lang/rust-clippy/pull/8376)
* [`explicit_write`]: Add suggestions for `write!`s with format arguments
[#8365](https://github.com/rust-lang/rust-clippy/pull/8365)
* [`manual_memcpy`]: Suggests `copy_from_slice` when applicable
[#8226](https://github.com/rust-lang/rust-clippy/pull/8226)
* [`or_fun_call`]: Improved suggestion display for long arguments
[#8292](https://github.com/rust-lang/rust-clippy/pull/8292)
* [`unnecessary_cast`]: Now correctly includes the sign
[#8350](https://github.com/rust-lang/rust-clippy/pull/8350)
* [`cmp_owned`]: No longer flips the comparison order
[#8299](https://github.com/rust-lang/rust-clippy/pull/8299)
* [`explicit_counter_loop`]: Now correctly suggests `iter()` on references
[#8382](https://github.com/rust-lang/rust-clippy/pull/8382)
### ICE Fixes
* [`manual_split_once`]
[#8250](https://github.com/rust-lang/rust-clippy/pull/8250)
### Documentation Improvements
* [`map_flatten`]: Add documentation for the `Option` type
[#8354](https://github.com/rust-lang/rust-clippy/pull/8354)
* Document that Clippy's driver might use a different code generation than rustc
[#8037](https://github.com/rust-lang/rust-clippy/pull/8037)
* Clippy's lint list will now automatically focus the search box
[#8343](https://github.com/rust-lang/rust-clippy/pull/8343)
### Others
* Clippy now warns if we find multiple Clippy config files exist
[#8326](https://github.com/rust-lang/rust-clippy/pull/8326)
## Rust 1.59
Released 2022-02-24
[View all 94 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2021-11-04T12%3A40%3A18Z..2021-12-30T13%3A36%3A20Z+base%3Amaster)
### New Lints
* [`index_refutable_slice`]
[#7643](https://github.com/rust-lang/rust-clippy/pull/7643)
* [`needless_splitn`]
[#7896](https://github.com/rust-lang/rust-clippy/pull/7896)
* [`unnecessary_to_owned`]
[#7978](https://github.com/rust-lang/rust-clippy/pull/7978)
* [`needless_late_init`]
[#7995](https://github.com/rust-lang/rust-clippy/pull/7995)
* [`octal_escapes`] [#8007](https://github.com/rust-lang/rust-clippy/pull/8007)
* [`return_self_not_must_use`]
[#8071](https://github.com/rust-lang/rust-clippy/pull/8071)
* [`init_numbered_fields`]
[#8170](https://github.com/rust-lang/rust-clippy/pull/8170)
### Moves and Deprecations
* Move `if_then_panic` to `pedantic` and rename to [`manual_assert`] (now
allow-by-default) [#7810](https://github.com/rust-lang/rust-clippy/pull/7810)
* Rename `disallow_type` to [`disallowed_types`] and `disallowed_method` to
[`disallowed_methods`]
[#7984](https://github.com/rust-lang/rust-clippy/pull/7984)
* Move [`map_flatten`] to `complexity` (now warn-by-default)
[#8054](https://github.com/rust-lang/rust-clippy/pull/8054)
### Enhancements
* [`match_overlapping_arm`]: Fix false negative where after included ranges,
overlapping ranges weren't linted anymore
[#7909](https://github.com/rust-lang/rust-clippy/pull/7909)
* [`deprecated_cfg_attr`]: Now takes the specified MSRV into account
[#7944](https://github.com/rust-lang/rust-clippy/pull/7944)
* [`cast_lossless`]: Now also lints for `bool` to integer casts
[#7948](https://github.com/rust-lang/rust-clippy/pull/7948)
* [`let_underscore_lock`]: Also emit lints for the `parking_lot` crate
[#7957](https://github.com/rust-lang/rust-clippy/pull/7957)
* [`needless_borrow`]
[#7977](https://github.com/rust-lang/rust-clippy/pull/7977)
* Lint when a borrow is auto-dereffed more than once
* Lint in the trailing expression of a block for a match arm
* [`strlen_on_c_strings`]
[8001](https://github.com/rust-lang/rust-clippy/pull/8001)
* Lint when used without a fully-qualified path
* Suggest removing the surrounding unsafe block when possible
* [`non_ascii_literal`]: Now also lints on `char`s, not just `string`s
[#8034](https://github.com/rust-lang/rust-clippy/pull/8034)
* [`single_char_pattern`]: Now also lints on `split_inclusive`, `split_once`,
`rsplit_once`, `replace`, and `replacen`
[#8077](https://github.com/rust-lang/rust-clippy/pull/8077)
* [`unwrap_or_else_default`]: Now also lints on `std` constructors like
`Vec::new`, `HashSet::new`, and `HashMap::new`
[#8163](https://github.com/rust-lang/rust-clippy/pull/8163)
* [`shadow_reuse`]: Now also lints on shadowed `if let` bindings, instead of
[`shadow_unrelated`]
[#8165](https://github.com/rust-lang/rust-clippy/pull/8165)
### False Positive Fixes
* [`or_fun_call`], [`unnecessary_lazy_evaluations`]: Improve heuristics, so that
cheap functions (e.g. calling `.len()` on a `Vec`) won't get linted anymore
[#7639](https://github.com/rust-lang/rust-clippy/pull/7639)
* [`manual_split_once`]: No longer suggests code changing the original behavior
[#7896](https://github.com/rust-lang/rust-clippy/pull/7896)
* Don't show [`no_effect`] or [`unnecessary_operation`] warning for unit struct
implementing `FnOnce`
[#7898](https://github.com/rust-lang/rust-clippy/pull/7898)
* [`semicolon_if_nothing_returned`]: Fixed a bug, where the lint wrongly
triggered on `let-else` statements
[#7955](https://github.com/rust-lang/rust-clippy/pull/7955)
* [`if_then_some_else_none`]: No longer lints if there is an early return
[#7980](https://github.com/rust-lang/rust-clippy/pull/7980)
* [`needless_collect`]: No longer suggests removal of `collect` when removal
would create code requiring mutably borrowing a value multiple times
[#7982](https://github.com/rust-lang/rust-clippy/pull/7982)
* [`shadow_same`]: Fix false positive for `async` function's params
[#7997](https://github.com/rust-lang/rust-clippy/pull/7997)
* [`suboptimal_flops`]: No longer triggers in constant functions
[#8009](https://github.com/rust-lang/rust-clippy/pull/8009)
* [`type_complexity`]: No longer lints on associated types in traits
[#8030](https://github.com/rust-lang/rust-clippy/pull/8030)
* [`question_mark`]: No longer lints if returned object is not local
[#8080](https://github.com/rust-lang/rust-clippy/pull/8080)
* [`option_if_let_else`]: No longer lint on complex sub-patterns
[#8086](https://github.com/rust-lang/rust-clippy/pull/8086)
* [`blocks_in_if_conditions`]: No longer lints on empty closures
[#8100](https://github.com/rust-lang/rust-clippy/pull/8100)
* [`enum_variant_names`]: No longer lint when first prefix is only a substring
of a camel-case word
[#8127](https://github.com/rust-lang/rust-clippy/pull/8127)
* [`identity_op`]: Only lint on integral operands
[#8183](https://github.com/rust-lang/rust-clippy/pull/8183)
### Suggestion Fixes/Improvements
* [`search_is_some`]: Fix suggestion for `any()` not taking item by reference
[#7463](https://github.com/rust-lang/rust-clippy/pull/7463)
* [`almost_swapped`]: Now detects if there is a `no_std` or `no_core` attribute
and adapts the suggestion accordingly
[#7877](https://github.com/rust-lang/rust-clippy/pull/7877)
* [`redundant_pattern_matching`]: Fix suggestion for deref expressions
[#7949](https://github.com/rust-lang/rust-clippy/pull/7949)
* [`explicit_counter_loop`]: Now also produces a suggestion for non-`usize`
types [#7950](https://github.com/rust-lang/rust-clippy/pull/7950)
* [`manual_map`]: Fix suggestion when used with unsafe functions and blocks
[#7968](https://github.com/rust-lang/rust-clippy/pull/7968)
* [`option_map_or_none`]: Suggest `map` over `and_then` when possible
[#7971](https://github.com/rust-lang/rust-clippy/pull/7971)
* [`option_if_let_else`]: No longer expands macros in the suggestion
[#7974](https://github.com/rust-lang/rust-clippy/pull/7974)
* [`iter_cloned_collect`]: Suggest `copied` over `cloned` when possible
[#8006](https://github.com/rust-lang/rust-clippy/pull/8006)
* [`doc_markdown`]: No longer uses inline hints to improve readability of
suggestion [#8011](https://github.com/rust-lang/rust-clippy/pull/8011)
* [`needless_question_mark`]: Now better explains the suggestion
[#8028](https://github.com/rust-lang/rust-clippy/pull/8028)
* [`single_char_pattern`]: Escape backslash `\` in suggestion
[#8067](https://github.com/rust-lang/rust-clippy/pull/8067)
* [`needless_bool`]: Suggest `a != b` over `!(a == b)`
[#8117](https://github.com/rust-lang/rust-clippy/pull/8117)
* [`iter_skip_next`]: Suggest to add a `mut` if it is necessary in order to
apply this lints suggestion
[#8133](https://github.com/rust-lang/rust-clippy/pull/8133)
* [`neg_multiply`]: Now produces a suggestion
[#8144](https://github.com/rust-lang/rust-clippy/pull/8144)
* [`needless_return`]: Now suggests the unit type `()` over an empty block `{}`
in match arms [#8185](https://github.com/rust-lang/rust-clippy/pull/8185)
* [`suboptimal_flops`]: Now gives a syntactically correct suggestion for
`to_radians` and `to_degrees`
[#8187](https://github.com/rust-lang/rust-clippy/pull/8187)
### ICE Fixes
* [`undocumented_unsafe_blocks`]
[#7945](https://github.com/rust-lang/rust-clippy/pull/7945)
[#7988](https://github.com/rust-lang/rust-clippy/pull/7988)
* [`unnecessary_cast`]
[#8167](https://github.com/rust-lang/rust-clippy/pull/8167)
### Documentation Improvements
* [`print_stdout`], [`print_stderr`], [`dbg_macro`]: Document how the lint level
can be changed crate-wide
[#8040](https://github.com/rust-lang/rust-clippy/pull/8040)
* Added a note to the `README` that config changes don't apply to already
compiled code [#8175](https://github.com/rust-lang/rust-clippy/pull/8175)
### Others
* [Clippy's lint
list](https://rust-lang.github.io/rust-clippy/master/index.html) now displays
the version a lint was added. :tada:
[#7813](https://github.com/rust-lang/rust-clippy/pull/7813)
* New and improved issue templates
[#8032](https://github.com/rust-lang/rust-clippy/pull/8032)
* _Dev:_ Add `cargo dev lint` command, to run your modified Clippy version on a
file [#7917](https://github.com/rust-lang/rust-clippy/pull/7917)
## Rust 1.58
Released 2022-01-13
[View all 68 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2021-10-07T09%3A49%3A18Z..2021-11-04T12%3A20%3A12Z+base%3Amaster)
### Rust 1.58.1
* Move [`non_send_fields_in_send_ty`] to `nursery` (now allow-by-default)
[#8075](https://github.com/rust-lang/rust-clippy/pull/8075)
* [`useless_format`]: Handle implicit named arguments
[#8295](https://github.com/rust-lang/rust-clippy/pull/8295)
### New lints
* [`transmute_num_to_bytes`]
[#7805](https://github.com/rust-lang/rust-clippy/pull/7805)
* [`match_str_case_mismatch`]
[#7806](https://github.com/rust-lang/rust-clippy/pull/7806)
* [`format_in_format_args`], [`to_string_in_format_args`]
[#7743](https://github.com/rust-lang/rust-clippy/pull/7743)
* [`uninit_vec`]
[#7682](https://github.com/rust-lang/rust-clippy/pull/7682)
* [`fn_to_numeric_cast_any`]
[#7705](https://github.com/rust-lang/rust-clippy/pull/7705)
* [`undocumented_unsafe_blocks`]
[#7748](https://github.com/rust-lang/rust-clippy/pull/7748)
* [`trailing_empty_array`]
[#7838](https://github.com/rust-lang/rust-clippy/pull/7838)
* [`string_slice`]
[#7878](https://github.com/rust-lang/rust-clippy/pull/7878)
### Moves or deprecations of lints
* Move [`non_send_fields_in_send_ty`] to `suspicious`
[#7874](https://github.com/rust-lang/rust-clippy/pull/7874)
* Move [`non_ascii_literal`] to `restriction`
[#7907](https://github.com/rust-lang/rust-clippy/pull/7907)
### Changes that expand what code existing lints cover
* [`question_mark`] now covers `Result`
[#7840](https://github.com/rust-lang/rust-clippy/pull/7840)
* Make [`useless_format`] recognize bare `format!("")`
[#7801](https://github.com/rust-lang/rust-clippy/pull/7801)
* Lint on underscored variables with no side effects in [`no_effect`]
[#7775](https://github.com/rust-lang/rust-clippy/pull/7775)
* Expand [`match_ref_pats`] to check for multiple reference patterns
[#7800](https://github.com/rust-lang/rust-clippy/pull/7800)
### False positive fixes
* Fix false positive of [`implicit_saturating_sub`] with `else` clause
[#7832](https://github.com/rust-lang/rust-clippy/pull/7832)
* Fix [`question_mark`] when there is call in conditional predicate
[#7860](https://github.com/rust-lang/rust-clippy/pull/7860)
* [`mut_mut`] no longer lints when type is defined in external macros
[#7795](https://github.com/rust-lang/rust-clippy/pull/7795)
* Avoid [`eq_op`] in test functions
[#7811](https://github.com/rust-lang/rust-clippy/pull/7811)
* [`cast_possible_truncation`] no longer lints when cast is coming from `signum`
method call [#7850](https://github.com/rust-lang/rust-clippy/pull/7850)
* [`match_str_case_mismatch`] no longer lints on uncased characters
[#7865](https://github.com/rust-lang/rust-clippy/pull/7865)
* [`ptr_arg`] no longer lints references to type aliases
[#7890](https://github.com/rust-lang/rust-clippy/pull/7890)
* [`missing_safety_doc`] now also accepts "implementation safety" headers
[#7856](https://github.com/rust-lang/rust-clippy/pull/7856)
* [`missing_safety_doc`] no longer lints if any parent has `#[doc(hidden)]`
attribute [#7849](https://github.com/rust-lang/rust-clippy/pull/7849)
* [`if_not_else`] now ignores else-if statements
[#7895](https://github.com/rust-lang/rust-clippy/pull/7895)
* Avoid linting [`cast_possible_truncation`] on bit-reducing operations
[#7819](https://github.com/rust-lang/rust-clippy/pull/7819)
* Avoid linting [`field_reassign_with_default`] when `Drop` and `Copy` are
involved [#7794](https://github.com/rust-lang/rust-clippy/pull/7794)
* [`unnecessary_sort_by`] now checks if argument implements `Ord` trait
[#7824](https://github.com/rust-lang/rust-clippy/pull/7824)
* Fix false positive in [`match_overlapping_arm`]
[#7847](https://github.com/rust-lang/rust-clippy/pull/7847)
* Prevent [`needless_lifetimes`] false positive in `async` function definition
[#7901](https://github.com/rust-lang/rust-clippy/pull/7901)
### Suggestion fixes/improvements
* Keep an initial `::` when [`doc_markdown`] suggests to use ticks
[#7916](https://github.com/rust-lang/rust-clippy/pull/7916)
* Add a machine applicable suggestion for the [`doc_markdown`] missing backticks
lint [#7904](https://github.com/rust-lang/rust-clippy/pull/7904)
* [`equatable_if_let`] no longer expands macros in the suggestion
[#7788](https://github.com/rust-lang/rust-clippy/pull/7788)
* Make [`shadow_reuse`] suggestion less verbose
[#7782](https://github.com/rust-lang/rust-clippy/pull/7782)
### ICE fixes
* Fix ICE in [`enum_variant_names`]
[#7873](https://github.com/rust-lang/rust-clippy/pull/7873)
* Fix ICE in [`undocumented_unsafe_blocks`]
[#7891](https://github.com/rust-lang/rust-clippy/pull/7891)
### Documentation improvements
* Fixed naive doc formatting for `#[must_use]` lints ([`must_use_unit`],
[`double_must_use`], [`must_use_candidate`], [`let_underscore_must_use`])
[#7827](https://github.com/rust-lang/rust-clippy/pull/7827)
* Fix typo in example for [`match_result_ok`]
[#7815](https://github.com/rust-lang/rust-clippy/pull/7815)
### Others
* Allow giving reasons for [`disallowed_types`]
[#7791](https://github.com/rust-lang/rust-clippy/pull/7791)
* Fix [`manual_assert`] and [`match_wild_err_arm`] for `#![no_std]` and Rust
2021. [#7851](https://github.com/rust-lang/rust-clippy/pull/7851)
* Fix regression in [`semicolon_if_nothing_returned`] on macros containing while
loops [#7789](https://github.com/rust-lang/rust-clippy/pull/7789)
* Added a new configuration `literal-suffix-style` to enforce a certain style
writing [`unseparated_literal_suffix`]
[#7726](https://github.com/rust-lang/rust-clippy/pull/7726)
## Rust 1.57
Released 2021-12-02
[View all 148 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2021-08-12T20%3A36%3A04Z..2021-11-03T17%3A57%3A59Z+base%3Amaster)
### New Lints
* [`negative_feature_names`]
[#7539](https://github.com/rust-lang/rust-clippy/pull/7539)
* [`redundant_feature_names`]
[#7539](https://github.com/rust-lang/rust-clippy/pull/7539)
* [`mod_module_files`]
[#7543](https://github.com/rust-lang/rust-clippy/pull/7543)
* [`self_named_module_files`]
[#7543](https://github.com/rust-lang/rust-clippy/pull/7543)
* [`manual_split_once`]
[#7565](https://github.com/rust-lang/rust-clippy/pull/7565)
* [`derivable_impls`]
[#7570](https://github.com/rust-lang/rust-clippy/pull/7570)
* [`needless_option_as_deref`]
[#7596](https://github.com/rust-lang/rust-clippy/pull/7596)
* [`iter_not_returning_iterator`]
[#7610](https://github.com/rust-lang/rust-clippy/pull/7610)
* [`same_name_method`]
[#7653](https://github.com/rust-lang/rust-clippy/pull/7653)
* [`manual_assert`] [#7669](https://github.com/rust-lang/rust-clippy/pull/7669)
* [`non_send_fields_in_send_ty`]
[#7709](https://github.com/rust-lang/rust-clippy/pull/7709)
* [`equatable_if_let`]
[#7762](https://github.com/rust-lang/rust-clippy/pull/7762)
### Moves and Deprecations
* Move [`shadow_unrelated`] to `restriction`
[#7338](https://github.com/rust-lang/rust-clippy/pull/7338)
* Move [`option_if_let_else`] to `nursery`
[#7568](https://github.com/rust-lang/rust-clippy/pull/7568)
* Move [`branches_sharing_code`] to `nursery`
[#7595](https://github.com/rust-lang/rust-clippy/pull/7595)
* Rename `if_let_some_result` to [`match_result_ok`] which now also handles
`while let` cases [#7608](https://github.com/rust-lang/rust-clippy/pull/7608)
* Move [`many_single_char_names`] to `pedantic`
[#7671](https://github.com/rust-lang/rust-clippy/pull/7671)
* Move [`float_cmp`] to `pedantic`
[#7692](https://github.com/rust-lang/rust-clippy/pull/7692)
* Rename `box_vec` to [`box_collection`] and lint on more general cases
[#7693](https://github.com/rust-lang/rust-clippy/pull/7693)
* Uplift `invalid_atomic_ordering` to rustc
[rust-lang/rust#84039](https://github.com/rust-lang/rust/pull/84039)
### Enhancements
* Rewrite the `shadow*` lints, so that they find a lot more shadows and are not
limited to certain patterns
[#7338](https://github.com/rust-lang/rust-clippy/pull/7338)
* The `avoid-breaking-exported-api` configuration now also works for
[`box_collection`], [`redundant_allocation`], [`rc_buffer`], [`vec_box`],
[`option_option`], [`linkedlist`], [`rc_mutex`]
[#7560](https://github.com/rust-lang/rust-clippy/pull/7560)
* [`unnecessary_unwrap`]: Now also checks for `expect`s
[#7584](https://github.com/rust-lang/rust-clippy/pull/7584)
* [`disallowed_methods`]: Allow adding a reason that will be displayed with the
lint message
[#7621](https://github.com/rust-lang/rust-clippy/pull/7621)
* [`approx_constant`]: Now checks the MSRV for `LOG10_2` and `LOG2_10`
[#7629](https://github.com/rust-lang/rust-clippy/pull/7629)
* [`approx_constant`]: Add `TAU`
[#7642](https://github.com/rust-lang/rust-clippy/pull/7642)
* [`needless_borrow`]: Now also lints on needless mutable borrows
[#7657](https://github.com/rust-lang/rust-clippy/pull/7657)
* [`missing_safety_doc`]: Now also lints on unsafe traits
[#7734](https://github.com/rust-lang/rust-clippy/pull/7734)
### False Positive Fixes
* [`manual_map`]: No longer lints when the option is borrowed in the match and
also consumed in the arm
[#7531](https://github.com/rust-lang/rust-clippy/pull/7531)
* [`filter_next`]: No longer lints if `filter` method is not the
`Iterator::filter` method
[#7562](https://github.com/rust-lang/rust-clippy/pull/7562)
* [`manual_flatten`]: No longer lints if expression is used after `if let`
[#7566](https://github.com/rust-lang/rust-clippy/pull/7566)
* [`option_if_let_else`]: Multiple fixes
[#7573](https://github.com/rust-lang/rust-clippy/pull/7573)
* `break` and `continue` statements local to the would-be closure are
allowed
* Don't lint in const contexts
* Don't lint when yield expressions are used
* Don't lint when the captures made by the would-be closure conflict with
the other branch
* Don't lint when a field of a local is used when the type could be
potentially moved from
* In some cases, don't lint when scrutinee expression conflicts with the
captures of the would-be closure
* [`redundant_allocation`]: No longer lints on `Box<Box<dyn T>>` which replaces
wide pointers with thin pointers
[#7592](https://github.com/rust-lang/rust-clippy/pull/7592)
* [`bool_assert_comparison`]: No longer lints on types that do not implement the
`Not` trait with `Output = bool`
[#7605](https://github.com/rust-lang/rust-clippy/pull/7605)
* [`mut_range_bound`]: No longer lints on range bound mutations, that are
immediately followed by a `break;`
[#7607](https://github.com/rust-lang/rust-clippy/pull/7607)
* [`mutable_key_type`]: Improve accuracy and document remaining false positives
and false negatives
[#7640](https://github.com/rust-lang/rust-clippy/pull/7640)
* [`redundant_closure`]: Rewrite the lint to fix various false positives and
false negatives [#7661](https://github.com/rust-lang/rust-clippy/pull/7661)
* [`large_enum_variant`]: No longer wrongly identifies the second largest
variant [#7677](https://github.com/rust-lang/rust-clippy/pull/7677)
* [`needless_return`]: No longer lints on let-else expressions
[#7685](https://github.com/rust-lang/rust-clippy/pull/7685)
* [`suspicious_else_formatting`]: No longer lints in proc-macros
[#7707](https://github.com/rust-lang/rust-clippy/pull/7707)
* [`excessive_precision`]: No longer lints when in some cases the float was
already written in the shortest form
[#7722](https://github.com/rust-lang/rust-clippy/pull/7722)
* [`doc_markdown`]: No longer lints on intra-doc links
[#7772](https://github.com/rust-lang/rust-clippy/pull/7772)
### Suggestion Fixes/Improvements
* [`unnecessary_operation`]: Recommend using an `assert!` instead of using a
function call in an indexing operation
[#7453](https://github.com/rust-lang/rust-clippy/pull/7453)
* [`manual_split_once`]: Produce semantically equivalent suggestion when
`rsplitn` is used [#7663](https://github.com/rust-lang/rust-clippy/pull/7663)
* [`while_let_on_iterator`]: Produce correct suggestion when using `&mut`
[#7690](https://github.com/rust-lang/rust-clippy/pull/7690)
* [`manual_assert`]: No better handles complex conditions
[#7741](https://github.com/rust-lang/rust-clippy/pull/7741)
* Correctly handle signs in exponents in numeric literals lints
[#7747](https://github.com/rust-lang/rust-clippy/pull/7747)
* [`suspicious_map`]: Now also suggests to use `inspect` as an alternative
[#7770](https://github.com/rust-lang/rust-clippy/pull/7770)
* Drop exponent from suggestion if it is 0 in numeric literals lints
[#7774](https://github.com/rust-lang/rust-clippy/pull/7774)
### ICE Fixes
* [`implicit_hasher`]
[#7761](https://github.com/rust-lang/rust-clippy/pull/7761)
### Others
* Clippy now uses the 2021
[Edition!](https://www.youtube.com/watch?v=q0aNduqb2Ro)
[#7664](https://github.com/rust-lang/rust-clippy/pull/7664)
## Rust 1.56
Released 2021-10-21
[View all 38 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2021-07-19T14%3A33%3A33Z..2021-08-12T09%3A28%3A38Z+base%3Amaster)
### New Lints
* [`unwrap_or_else_default`]
[#7516](https://github.com/rust-lang/rust-clippy/pull/7516)
### Enhancements
* [`needless_continue`]: Now also lints in `loop { continue; }` case
[#7477](https://github.com/rust-lang/rust-clippy/pull/7477)
* [`disallowed_types`]: Now also primitive types can be disallowed
[#7488](https://github.com/rust-lang/rust-clippy/pull/7488)
* [`manual_swap`]: Now also lints on xor swaps
[#7506](https://github.com/rust-lang/rust-clippy/pull/7506)
* [`map_flatten`]: Now also lints on the `Result` type
[#7522](https://github.com/rust-lang/rust-clippy/pull/7522)
* [`no_effect`]: Now also lints on inclusive ranges
[#7556](https://github.com/rust-lang/rust-clippy/pull/7556)
### False Positive Fixes
* [`nonstandard_macro_braces`]: No longer lints on similar named nested macros
[#7478](https://github.com/rust-lang/rust-clippy/pull/7478)
* [`too_many_lines`]: No longer lints in closures to avoid duplicated diagnostics
[#7534](https://github.com/rust-lang/rust-clippy/pull/7534)
* [`similar_names`]: No longer complains about `iter` and `item` being too
similar [#7546](https://github.com/rust-lang/rust-clippy/pull/7546)
### Suggestion Fixes/Improvements
* [`similar_names`]: No longer suggests to insert or add an underscore as a fix
[#7221](https://github.com/rust-lang/rust-clippy/pull/7221)
* [`new_without_default`]: No longer shows the full qualified type path when
suggesting adding a `Default` implementation
[#7493](https://github.com/rust-lang/rust-clippy/pull/7493)
* [`while_let_on_iterator`]: Now suggests re-borrowing mutable references
[#7520](https://github.com/rust-lang/rust-clippy/pull/7520)
* [`extend_with_drain`]: Improve code suggestion for mutable and immutable
references [#7533](https://github.com/rust-lang/rust-clippy/pull/7533)
* [`trivially_copy_pass_by_ref`]: Now properly handles `Self` type
[#7535](https://github.com/rust-lang/rust-clippy/pull/7535)
* [`never_loop`]: Now suggests using `if let` instead of a `for` loop when
applicable [#7541](https://github.com/rust-lang/rust-clippy/pull/7541)
### Documentation Improvements
* Clippy now uses a lint to generate its lint documentation. [Lints all the way
down](https://en.wikipedia.org/wiki/Turtles_all_the_way_down).
[#7502](https://github.com/rust-lang/rust-clippy/pull/7502)
* Reworked Clippy's website:
[#7172](https://github.com/rust-lang/rust-clippy/issues/7172)
[#7279](https://github.com/rust-lang/rust-clippy/pull/7279)
* Added applicability information about lints
* Added a link to jump into the implementation
* Improved loading times
* Adapted some styling
* `cargo clippy --help` now also explains the `--fix` and `--no-deps` flag
[#7492](https://github.com/rust-lang/rust-clippy/pull/7492)
* [`unnested_or_patterns`]: Removed `or_patterns` feature gate in the code
example [#7507](https://github.com/rust-lang/rust-clippy/pull/7507)
## Rust 1.55
Released 2021-09-09
[View all 83 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2021-06-03T07%3A23%3A59Z..2021-07-29T11%3A47%3A32Z+base%3Amaster)
### Important Changes
* Stabilized `cargo clippy --fix` :tada:
[#7405](https://github.com/rust-lang/rust-clippy/pull/7405)
### New Lints
* [`rc_mutex`]
[#7316](https://github.com/rust-lang/rust-clippy/pull/7316)
* [`nonstandard_macro_braces`]
[#7299](https://github.com/rust-lang/rust-clippy/pull/7299)
* [`strlen_on_c_strings`]
[#7243](https://github.com/rust-lang/rust-clippy/pull/7243)
* [`self_named_constructors`]
[#7403](https://github.com/rust-lang/rust-clippy/pull/7403)
* [`disallowed_script_idents`]
[#7400](https://github.com/rust-lang/rust-clippy/pull/7400)
* [`disallowed_types`]
[#7315](https://github.com/rust-lang/rust-clippy/pull/7315)
* [`missing_enforced_import_renames`]
[#7300](https://github.com/rust-lang/rust-clippy/pull/7300)
* [`extend_with_drain`]
[#7270](https://github.com/rust-lang/rust-clippy/pull/7270)
### Moves and Deprecations
* Moved [`from_iter_instead_of_collect`] to `pedantic`
[#7375](https://github.com/rust-lang/rust-clippy/pull/7375)
* Added `suspicious` as a new lint group for *code that is most likely wrong or useless*
[#7350](https://github.com/rust-lang/rust-clippy/pull/7350)
* Moved [`blanket_clippy_restriction_lints`] to `suspicious`
* Moved [`empty_loop`] to `suspicious`
* Moved [`eval_order_dependence`] to `suspicious`
* Moved [`float_equality_without_abs`] to `suspicious`
* Moved [`for_loops_over_fallibles`] to `suspicious`
* Moved [`misrefactored_assign_op`] to `suspicious`
* Moved [`mut_range_bound`] to `suspicious`
* Moved [`mutable_key_type`] to `suspicious`
* Moved [`suspicious_arithmetic_impl`] to `suspicious`
* Moved [`suspicious_assignment_formatting`] to `suspicious`
* Moved [`suspicious_else_formatting`] to `suspicious`
* Moved [`suspicious_map`] to `suspicious`
* Moved [`suspicious_op_assign_impl`] to `suspicious`
* Moved [`suspicious_unary_op_formatting`] to `suspicious`
### Enhancements
* [`while_let_on_iterator`]: Now suggests `&mut iter` inside closures
[#7262](https://github.com/rust-lang/rust-clippy/pull/7262)
* [`doc_markdown`]:
* Now detects unbalanced ticks
[#7357](https://github.com/rust-lang/rust-clippy/pull/7357)
* Add `FreeBSD` to the default configuration as an allowed identifier
[#7334](https://github.com/rust-lang/rust-clippy/pull/7334)
* [`wildcard_enum_match_arm`], [`match_wildcard_for_single_variants`]: Now allows wildcards for enums with unstable
or hidden variants
[#7407](https://github.com/rust-lang/rust-clippy/pull/7407)
* [`redundant_allocation`]: Now additionally supports the `Arc<>` type
[#7308](https://github.com/rust-lang/rust-clippy/pull/7308)
* [`disallowed_names`]: Now allows disallowed names in test code
[#7379](https://github.com/rust-lang/rust-clippy/pull/7379)
* [`redundant_closure`]: Suggests `&mut` for `FnMut`
[#7437](https://github.com/rust-lang/rust-clippy/pull/7437)
* [`disallowed_methods`], [`disallowed_types`]: The configuration values `disallowed-method` and `disallowed-type`
no longer require fully qualified paths
[#7345](https://github.com/rust-lang/rust-clippy/pull/7345)
* [`zst_offset`]: Fixed lint invocation after it was accidentally suppressed
[#7396](https://github.com/rust-lang/rust-clippy/pull/7396)
### False Positive Fixes
* [`default_numeric_fallback`]: No longer lints on float literals as function arguments
[#7446](https://github.com/rust-lang/rust-clippy/pull/7446)
* [`use_self`]: No longer lints on type parameters
[#7288](https://github.com/rust-lang/rust-clippy/pull/7288)
* [`unimplemented`]: Now ignores the `assert` and `debug_assert` macros
[#7439](https://github.com/rust-lang/rust-clippy/pull/7439)
* [`branches_sharing_code`]: Now always checks for block expressions
[#7462](https://github.com/rust-lang/rust-clippy/pull/7462)
* [`field_reassign_with_default`]: No longer triggers in macros
[#7160](https://github.com/rust-lang/rust-clippy/pull/7160)
* [`redundant_clone`]: No longer lints on required clones for borrowed data
[#7346](https://github.com/rust-lang/rust-clippy/pull/7346)
* [`default_numeric_fallback`]: No longer triggers in external macros
[#7325](https://github.com/rust-lang/rust-clippy/pull/7325)
* [`needless_bool`]: No longer lints in macros
[#7442](https://github.com/rust-lang/rust-clippy/pull/7442)
* [`useless_format`]: No longer triggers when additional text is being appended
[#7442](https://github.com/rust-lang/rust-clippy/pull/7442)
* [`assertions_on_constants`]: `cfg!(...)` is no longer considered to be a constant
[#7319](https://github.com/rust-lang/rust-clippy/pull/7319)
### Suggestion Fixes/Improvements
* [`needless_collect`]: Now show correct lint messages for shadowed values
[#7289](https://github.com/rust-lang/rust-clippy/pull/7289)
* [`wrong_pub_self_convention`]: The deprecated message now suggest the correct configuration value
[#7382](https://github.com/rust-lang/rust-clippy/pull/7382)
* [`semicolon_if_nothing_returned`]: Allow missing semicolon in blocks with only one expression
[#7326](https://github.com/rust-lang/rust-clippy/pull/7326)
### ICE Fixes
* [`zero_sized_map_values`]
[#7470](https://github.com/rust-lang/rust-clippy/pull/7470)
* [`redundant_pattern_matching`]
[#7471](https://github.com/rust-lang/rust-clippy/pull/7471)
* [`modulo_one`]
[#7473](https://github.com/rust-lang/rust-clippy/pull/7473)
* [`use_self`]
[#7428](https://github.com/rust-lang/rust-clippy/pull/7428)
## Rust 1.54
Released 2021-07-29
[View all 74 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2021-04-27T23%3A51%3A18Z..2021-06-03T06%3A54%3A07Z+base%3Amaster)
### New Lints
- [`ref_binding_to_reference`]
[#7105](https://github.com/rust-lang/rust-clippy/pull/7105)
- [`needless_bitwise_bool`]
[#7133](https://github.com/rust-lang/rust-clippy/pull/7133)
- [`unused_async`] [#7225](https://github.com/rust-lang/rust-clippy/pull/7225)
- [`manual_str_repeat`]
[#7265](https://github.com/rust-lang/rust-clippy/pull/7265)
- [`suspicious_splitn`]
[#7292](https://github.com/rust-lang/rust-clippy/pull/7292)
### Moves and Deprecations
- Deprecate `pub_enum_variant_names` and `wrong_pub_self_convention` in favor of
the new `avoid-breaking-exported-api` config option (see
[Enhancements](#1-54-enhancements))
[#7187](https://github.com/rust-lang/rust-clippy/pull/7187)
- Move [`inconsistent_struct_constructor`] to `pedantic`
[#7193](https://github.com/rust-lang/rust-clippy/pull/7193)
- Move [`needless_borrow`] to `style` (now warn-by-default)
[#7254](https://github.com/rust-lang/rust-clippy/pull/7254)
- Move [`suspicious_operation_groupings`] to `nursery`
[#7266](https://github.com/rust-lang/rust-clippy/pull/7266)
- Move [`semicolon_if_nothing_returned`] to `pedantic`
[#7268](https://github.com/rust-lang/rust-clippy/pull/7268)
### Enhancements <a name="1-54-enhancements"></a>
- [`while_let_on_iterator`]: Now also lints in nested loops
[#6966](https://github.com/rust-lang/rust-clippy/pull/6966)
- [`single_char_pattern`]: Now also lints on `strip_prefix` and `strip_suffix`
[#7156](https://github.com/rust-lang/rust-clippy/pull/7156)
- [`needless_collect`]: Now also lints on assignments with type annotations
[#7163](https://github.com/rust-lang/rust-clippy/pull/7163)
- [`if_then_some_else_none`]: Now works with the MSRV config
[#7177](https://github.com/rust-lang/rust-clippy/pull/7177)
- Add `avoid-breaking-exported-api` config option for the lints
[`enum_variant_names`], [`large_types_passed_by_value`],
[`trivially_copy_pass_by_ref`], [`unnecessary_wraps`],
[`upper_case_acronyms`], and [`wrong_self_convention`]. We recommend to set
this configuration option to `false` before a major release (1.0/2.0/...) to
clean up the API [#7187](https://github.com/rust-lang/rust-clippy/pull/7187)
- [`needless_collect`]: Now lints on even more data structures
[#7188](https://github.com/rust-lang/rust-clippy/pull/7188)
- [`missing_docs_in_private_items`]: No longer sees `#[<name> = "<value>"]` like
attributes as sufficient documentation
[#7281](https://github.com/rust-lang/rust-clippy/pull/7281)
- [`needless_collect`], [`short_circuit_statement`], [`unnecessary_operation`]:
Now work as expected when used with `allow`
[#7282](https://github.com/rust-lang/rust-clippy/pull/7282)
### False Positive Fixes
- [`implicit_return`]: Now takes all diverging functions in account to avoid
false positives [#6951](https://github.com/rust-lang/rust-clippy/pull/6951)
- [`while_let_on_iterator`]: No longer lints when the iterator is a struct field
and the struct is used in the loop
[#6966](https://github.com/rust-lang/rust-clippy/pull/6966)
- [`multiple_inherent_impl`]: No longer lints with generic arguments
[#7089](https://github.com/rust-lang/rust-clippy/pull/7089)
- [`comparison_chain`]: No longer lints in a `const` context
[#7118](https://github.com/rust-lang/rust-clippy/pull/7118)
- [`while_immutable_condition`]: Fix false positive where mutation in the loop
variable wasn't picked up
[#7144](https://github.com/rust-lang/rust-clippy/pull/7144)
- [`default_trait_access`]: No longer lints in macros
[#7150](https://github.com/rust-lang/rust-clippy/pull/7150)
- [`needless_question_mark`]: No longer lints when the inner value is implicitly
dereferenced [#7165](https://github.com/rust-lang/rust-clippy/pull/7165)
- [`unused_unit`]: No longer lints when multiple macro contexts are involved
[#7167](https://github.com/rust-lang/rust-clippy/pull/7167)
- [`eval_order_dependence`]: Fix false positive in async context
[#7174](https://github.com/rust-lang/rust-clippy/pull/7174)
- [`unnecessary_filter_map`]: No longer lints if the `filter_map` changes the
type [#7175](https://github.com/rust-lang/rust-clippy/pull/7175)
- [`wrong_self_convention`]: No longer lints in trait implementations of
non-`Copy` types [#7182](https://github.com/rust-lang/rust-clippy/pull/7182)
- [`suboptimal_flops`]: No longer lints on `powi(2)`
[#7201](https://github.com/rust-lang/rust-clippy/pull/7201)
- [`wrong_self_convention`]: No longer lints if there is no implicit `self`
[#7215](https://github.com/rust-lang/rust-clippy/pull/7215)
- [`option_if_let_else`]: No longer lints on `else if let` pattern
[#7216](https://github.com/rust-lang/rust-clippy/pull/7216)
- [`use_self`], [`useless_conversion`]: Fix false positives when generic
arguments are involved
[#7223](https://github.com/rust-lang/rust-clippy/pull/7223)
- [`manual_unwrap_or`]: Fix false positive with deref coercion
[#7233](https://github.com/rust-lang/rust-clippy/pull/7233)
- [`similar_names`]: No longer lints on `wparam`/`lparam`
[#7255](https://github.com/rust-lang/rust-clippy/pull/7255)
- [`redundant_closure`]: No longer lints on using the `vec![]` macro in a
closure [#7263](https://github.com/rust-lang/rust-clippy/pull/7263)
### Suggestion Fixes/Improvements
- [`implicit_return`]
[#6951](https://github.com/rust-lang/rust-clippy/pull/6951)
- Fix suggestion for async functions
- Improve suggestion with macros
- Suggest to change `break` to `return` when appropriate
- [`while_let_on_iterator`]: Now suggests `&mut iter` when necessary
[#6966](https://github.com/rust-lang/rust-clippy/pull/6966)
- [`match_single_binding`]: Improve suggestion when match scrutinee has side
effects [#7095](https://github.com/rust-lang/rust-clippy/pull/7095)
- [`needless_borrow`]: Now suggests to also change usage sites as needed
[#7105](https://github.com/rust-lang/rust-clippy/pull/7105)
- [`write_with_newline`]: Improve suggestion when only `\n` is written to the
buffer [#7183](https://github.com/rust-lang/rust-clippy/pull/7183)
- [`from_iter_instead_of_collect`]: The suggestion is now auto applicable also
when a `<_ as Trait>::_` is involved
[#7264](https://github.com/rust-lang/rust-clippy/pull/7264)
- [`not_unsafe_ptr_arg_deref`]: Improved error message
[#7294](https://github.com/rust-lang/rust-clippy/pull/7294)
### ICE Fixes
- Fix ICE when running Clippy on `libstd`
[#7140](https://github.com/rust-lang/rust-clippy/pull/7140)
- [`implicit_return`]
[#7242](https://github.com/rust-lang/rust-clippy/pull/7242)
## Rust 1.53
Released 2021-06-17
[View all 126 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2021-03-12T22%3A49%3A20Z..2021-04-27T14%3A38%3A20Z+base%3Amaster)
### New Lints
* [`option_filter_map`]
[#6342](https://github.com/rust-lang/rust-clippy/pull/6342)
* [`branches_sharing_code`]
[#6463](https://github.com/rust-lang/rust-clippy/pull/6463)
* [`needless_for_each`]
[#6706](https://github.com/rust-lang/rust-clippy/pull/6706)
* [`if_then_some_else_none`]
[#6859](https://github.com/rust-lang/rust-clippy/pull/6859)
* [`non_octal_unix_permissions`]
[#7001](https://github.com/rust-lang/rust-clippy/pull/7001)
* [`unnecessary_self_imports`]
[#7072](https://github.com/rust-lang/rust-clippy/pull/7072)
* [`bool_assert_comparison`]
[#7083](https://github.com/rust-lang/rust-clippy/pull/7083)
* [`cloned_instead_of_copied`]
[#7098](https://github.com/rust-lang/rust-clippy/pull/7098)
* [`flat_map_option`]
[#7101](https://github.com/rust-lang/rust-clippy/pull/7101)
### Moves and Deprecations
* Deprecate [`filter_map`] lint
[#7059](https://github.com/rust-lang/rust-clippy/pull/7059)
* Move [`transmute_ptr_to_ptr`] to `pedantic`
[#7102](https://github.com/rust-lang/rust-clippy/pull/7102)
### Enhancements
* [`mem_replace_with_default`]: Also lint on common std constructors
[#6820](https://github.com/rust-lang/rust-clippy/pull/6820)
* [`wrong_self_convention`]: Also lint on `to_*_mut` methods
[#6828](https://github.com/rust-lang/rust-clippy/pull/6828)
* [`wildcard_enum_match_arm`], [`match_wildcard_for_single_variants`]:
[#6863](https://github.com/rust-lang/rust-clippy/pull/6863)
* Attempt to find a common path prefix in suggestion
* Don't lint on `Option` and `Result`
* Consider `Self` prefix
* [`explicit_deref_methods`]: Also lint on chained `deref` calls
[#6865](https://github.com/rust-lang/rust-clippy/pull/6865)
* [`or_fun_call`]: Also lint on `unsafe` blocks
[#6928](https://github.com/rust-lang/rust-clippy/pull/6928)
* [`vec_box`], [`linkedlist`], [`option_option`]: Also lint in `const` and
`static` items [#6938](https://github.com/rust-lang/rust-clippy/pull/6938)
* [`search_is_some`]: Also check for `is_none`
[#6942](https://github.com/rust-lang/rust-clippy/pull/6942)
* [`string_lit_as_bytes`]: Also lint on `into_bytes`
[#6959](https://github.com/rust-lang/rust-clippy/pull/6959)
* [`len_without_is_empty`]: Also lint if function signatures of `len` and
`is_empty` don't match
[#6980](https://github.com/rust-lang/rust-clippy/pull/6980)
* [`redundant_pattern_matching`]: Also lint if the pattern is a `&` pattern
[#6991](https://github.com/rust-lang/rust-clippy/pull/6991)
* [`clone_on_copy`]: Also lint on chained method calls taking `self` by value
[#7000](https://github.com/rust-lang/rust-clippy/pull/7000)
* [`missing_panics_doc`]: Also lint on `assert_eq!` and `assert_ne!`
[#7029](https://github.com/rust-lang/rust-clippy/pull/7029)
* [`needless_return`]: Also lint in `async` functions
[#7067](https://github.com/rust-lang/rust-clippy/pull/7067)
* [`unused_io_amount`]: Also lint on expressions like `_.read().ok()?`
[#7100](https://github.com/rust-lang/rust-clippy/pull/7100)
* [`iter_cloned_collect`]: Also lint on large arrays, since const-generics are
now stable [#7138](https://github.com/rust-lang/rust-clippy/pull/7138)
### False Positive Fixes
* [`upper_case_acronyms`]: No longer lints on public items
[#6805](https://github.com/rust-lang/rust-clippy/pull/6805)
* [`suspicious_map`]: No longer lints when side effects may occur inside the
`map` call [#6831](https://github.com/rust-lang/rust-clippy/pull/6831)
* [`manual_map`], [`manual_unwrap_or`]: No longer lints in `const` functions
[#6917](https://github.com/rust-lang/rust-clippy/pull/6917)
* [`wrong_self_convention`]: Now respects `Copy` types
[#6924](https://github.com/rust-lang/rust-clippy/pull/6924)
* [`needless_question_mark`]: No longer lints if the `?` and the `Some(..)` come
from different macro contexts [#6935](https://github.com/rust-lang/rust-clippy/pull/6935)
* [`map_entry`]: Better detect if the entry API can be used
[#6937](https://github.com/rust-lang/rust-clippy/pull/6937)
* [`or_fun_call`]: No longer lints on some `len` function calls
[#6950](https://github.com/rust-lang/rust-clippy/pull/6950)
* [`new_ret_no_self`]: No longer lints when `Self` is returned with different
generic arguments [#6952](https://github.com/rust-lang/rust-clippy/pull/6952)
* [`upper_case_acronyms`]: No longer lints on public items
[#6981](https://github.com/rust-lang/rust-clippy/pull/6981)
* [`explicit_into_iter_loop`]: Only lint when `into_iter` is an implementation
of `IntoIterator` [#6982](https://github.com/rust-lang/rust-clippy/pull/6982)
* [`expl_impl_clone_on_copy`]: Take generic constraints into account before
suggesting to use `derive` instead
[#6993](https://github.com/rust-lang/rust-clippy/pull/6993)
* [`missing_panics_doc`]: No longer lints when only debug-assertions are used
[#6996](https://github.com/rust-lang/rust-clippy/pull/6996)
* [`clone_on_copy`]: Only lint when using the `Clone` trait
[#7000](https://github.com/rust-lang/rust-clippy/pull/7000)
* [`wrong_self_convention`]: No longer lints inside a trait implementation
[#7002](https://github.com/rust-lang/rust-clippy/pull/7002)
* [`redundant_clone`]: No longer lints when the cloned value is modified while
the clone is in use
[#7011](https://github.com/rust-lang/rust-clippy/pull/7011)
* [`same_item_push`]: No longer lints if the `Vec` is used in the loop body
[#7018](https://github.com/rust-lang/rust-clippy/pull/7018)
* [`cargo_common_metadata`]: Remove author requirement
[#7026](https://github.com/rust-lang/rust-clippy/pull/7026)
* [`panic_in_result_fn`]: No longer lints on `debug_assert` family
[#7060](https://github.com/rust-lang/rust-clippy/pull/7060)
* [`panic`]: No longer wrongfully lints on `debug_assert` with message
[#7063](https://github.com/rust-lang/rust-clippy/pull/7063)
* [`wrong_self_convention`]: No longer lints in trait implementations where no
`self` is involved [#7064](https://github.com/rust-lang/rust-clippy/pull/7064)
* [`missing_const_for_fn`]: No longer lints when unstable `const` function is
involved [#7076](https://github.com/rust-lang/rust-clippy/pull/7076)
* [`suspicious_else_formatting`]: Allow Allman style braces
[#7087](https://github.com/rust-lang/rust-clippy/pull/7087)
* [`inconsistent_struct_constructor`]: No longer lints in macros
[#7097](https://github.com/rust-lang/rust-clippy/pull/7097)
* [`single_component_path_imports`]: No longer lints on macro re-exports
[#7120](https://github.com/rust-lang/rust-clippy/pull/7120)
### Suggestion Fixes/Improvements
* [`redundant_pattern_matching`]: Add a note when applying this lint would
change the drop order
[#6568](https://github.com/rust-lang/rust-clippy/pull/6568)
* [`write_literal`], [`print_literal`]: Add auto-applicable suggestion
[#6821](https://github.com/rust-lang/rust-clippy/pull/6821)
* [`manual_map`]: Fix suggestion for complex `if let ... else` chains
[#6856](https://github.com/rust-lang/rust-clippy/pull/6856)
* [`inconsistent_struct_constructor`]: Make lint description and message clearer
[#6892](https://github.com/rust-lang/rust-clippy/pull/6892)
* [`map_entry`]: Now suggests `or_insert`, `insert_with` or `match _.entry(_)`
as appropriate [#6937](https://github.com/rust-lang/rust-clippy/pull/6937)
* [`manual_flatten`]: Suggest to insert `copied` if necessary
[#6962](https://github.com/rust-lang/rust-clippy/pull/6962)
* [`redundant_slicing`]: Fix suggestion when a re-borrow might be required or
when the value is from a macro call
[#6975](https://github.com/rust-lang/rust-clippy/pull/6975)
* [`match_wildcard_for_single_variants`]: Fix suggestion for hidden variant
[#6988](https://github.com/rust-lang/rust-clippy/pull/6988)
* [`clone_on_copy`]: Correct suggestion when the cloned value is a macro call
[#7000](https://github.com/rust-lang/rust-clippy/pull/7000)
* [`manual_map`]: Fix suggestion at the end of an if chain
[#7004](https://github.com/rust-lang/rust-clippy/pull/7004)
* Fix needless parenthesis output in multiple lint suggestions
[#7013](https://github.com/rust-lang/rust-clippy/pull/7013)
* [`needless_collect`]: Better explanation in the lint message
[#7020](https://github.com/rust-lang/rust-clippy/pull/7020)
* [`useless_vec`]: Now considers mutability
[#7036](https://github.com/rust-lang/rust-clippy/pull/7036)
* [`useless_format`]: Wrap the content in braces if necessary
[#7092](https://github.com/rust-lang/rust-clippy/pull/7092)
* [`single_match`]: Don't suggest an equality check for types which don't
implement `PartialEq`
[#7093](https://github.com/rust-lang/rust-clippy/pull/7093)
* [`from_over_into`]: Mention type in help message
[#7099](https://github.com/rust-lang/rust-clippy/pull/7099)
* [`manual_unwrap_or`]: Fix invalid code suggestion due to a macro call
[#7136](https://github.com/rust-lang/rust-clippy/pull/7136)
### ICE Fixes
* [`macro_use_imports`]
[#7022](https://github.com/rust-lang/rust-clippy/pull/7022)
* [`missing_panics_doc`]
[#7034](https://github.com/rust-lang/rust-clippy/pull/7034)
* [`tabs_in_doc_comments`]
[#7039](https://github.com/rust-lang/rust-clippy/pull/7039)
* [`missing_const_for_fn`]
[#7128](https://github.com/rust-lang/rust-clippy/pull/7128)
### Others
* [Clippy's lint
list](https://rust-lang.github.io/rust-clippy/master/index.html) now supports
themes [#7030](https://github.com/rust-lang/rust-clippy/pull/7030)
* Lints that were uplifted to `rustc` now mention the new `rustc` name in the
deprecation warning
[#7056](https://github.com/rust-lang/rust-clippy/pull/7056)
## Rust 1.52
Released 2021-05-06
[View all 102 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2021-02-03T15%3A59%3A06Z..2021-03-11T20%3A06%3A43Z+base%3Amaster)
### New Lints
* [`from_str_radix_10`]
[#6717](https://github.com/rust-lang/rust-clippy/pull/6717)
* [`implicit_clone`]
[#6730](https://github.com/rust-lang/rust-clippy/pull/6730)
* [`semicolon_if_nothing_returned`]
[#6681](https://github.com/rust-lang/rust-clippy/pull/6681)
* [`manual_flatten`]
[#6646](https://github.com/rust-lang/rust-clippy/pull/6646)
* [`inconsistent_struct_constructor`]
[#6769](https://github.com/rust-lang/rust-clippy/pull/6769)
* [`iter_count`]
[#6791](https://github.com/rust-lang/rust-clippy/pull/6791)
* [`default_numeric_fallback`]
[#6662](https://github.com/rust-lang/rust-clippy/pull/6662)
* [`bytes_nth`]
[#6695](https://github.com/rust-lang/rust-clippy/pull/6695)
* [`filter_map_identity`]
[#6685](https://github.com/rust-lang/rust-clippy/pull/6685)
* [`manual_map`]
[#6573](https://github.com/rust-lang/rust-clippy/pull/6573)
### Moves and Deprecations
* Moved [`upper_case_acronyms`] to `pedantic`
[#6775](https://github.com/rust-lang/rust-clippy/pull/6775)
* Moved [`manual_map`] to `nursery`
[#6796](https://github.com/rust-lang/rust-clippy/pull/6796)
* Moved [`unnecessary_wraps`] to `pedantic`
[#6765](https://github.com/rust-lang/rust-clippy/pull/6765)
* Moved [`trivial_regex`] to `nursery`
[#6696](https://github.com/rust-lang/rust-clippy/pull/6696)
* Moved [`naive_bytecount`] to `pedantic`
[#6825](https://github.com/rust-lang/rust-clippy/pull/6825)
* Moved [`upper_case_acronyms`] to `style`
[#6788](https://github.com/rust-lang/rust-clippy/pull/6788)
* Moved [`manual_map`] to `style`
[#6801](https://github.com/rust-lang/rust-clippy/pull/6801)
### Enhancements
* [`disallowed_methods`]: Now supports functions in addition to methods
[#6674](https://github.com/rust-lang/rust-clippy/pull/6674)
* [`upper_case_acronyms`]: Added a new configuration `upper-case-acronyms-aggressive` to
trigger the lint if there is more than one uppercase character next to each other
[#6788](https://github.com/rust-lang/rust-clippy/pull/6788)
* [`collapsible_match`]: Now supports block comparison with different value names
[#6754](https://github.com/rust-lang/rust-clippy/pull/6754)
* [`unnecessary_wraps`]: Will now suggest removing unnecessary wrapped return unit type, like `Option<()>`
[#6665](https://github.com/rust-lang/rust-clippy/pull/6665)
* Improved value usage detection in closures
[#6698](https://github.com/rust-lang/rust-clippy/pull/6698)
### False Positive Fixes
* [`use_self`]: No longer lints in macros
[#6833](https://github.com/rust-lang/rust-clippy/pull/6833)
* [`use_self`]: Fixed multiple false positives for: generics, associated types and derive implementations
[#6179](https://github.com/rust-lang/rust-clippy/pull/6179)
* [`missing_inline_in_public_items`]: No longer lints for procedural macros
[#6814](https://github.com/rust-lang/rust-clippy/pull/6814)
* [`inherent_to_string`]: No longer lints on functions with function generics
[#6771](https://github.com/rust-lang/rust-clippy/pull/6771)
* [`doc_markdown`]: Add `OpenDNS` to the default configuration as an allowed identifier
[#6783](https://github.com/rust-lang/rust-clippy/pull/6783)
* [`missing_panics_doc`]: No longer lints on [`unreachable!`](https://doc.rust-lang.org/std/macro.unreachable.html)
[#6700](https://github.com/rust-lang/rust-clippy/pull/6700)
* [`collapsible_if`]: No longer lints on if statements with attributes
[#6701](https://github.com/rust-lang/rust-clippy/pull/6701)
* [`match_same_arms`]: Only considers empty blocks as equal if the tokens contained are the same
[#6843](https://github.com/rust-lang/rust-clippy/pull/6843)
* [`redundant_closure`]: Now ignores macros
[#6871](https://github.com/rust-lang/rust-clippy/pull/6871)
* [`manual_map`]: Fixed false positives when control flow statements like `return`, `break` etc. are used
[#6801](https://github.com/rust-lang/rust-clippy/pull/6801)
* [`vec_init_then_push`]: Fixed false positives for loops and if statements
[#6697](https://github.com/rust-lang/rust-clippy/pull/6697)
* [`len_without_is_empty`]: Will now consider multiple impl blocks and `#[allow]` on
the `len` method as well as the type definition.
[#6853](https://github.com/rust-lang/rust-clippy/pull/6853)
* [`let_underscore_drop`]: Only lints on types which implement `Drop`
[#6682](https://github.com/rust-lang/rust-clippy/pull/6682)
* [`unit_arg`]: No longer lints on unit arguments when they come from a path expression.
[#6601](https://github.com/rust-lang/rust-clippy/pull/6601)
* [`cargo_common_metadata`]: No longer lints if
[`publish = false`](https://doc.rust-lang.org/cargo/reference/manifest.html#the-publish-field)
is defined in the manifest
[#6650](https://github.com/rust-lang/rust-clippy/pull/6650)
### Suggestion Fixes/Improvements
* [`collapsible_match`]: Fixed lint message capitalization
[#6766](https://github.com/rust-lang/rust-clippy/pull/6766)
* [`or_fun_call`]: Improved suggestions for `or_insert(vec![])`
[#6790](https://github.com/rust-lang/rust-clippy/pull/6790)
* [`manual_map`]: No longer expands macros in the suggestions
[#6801](https://github.com/rust-lang/rust-clippy/pull/6801)
* Aligned Clippy's lint messages with the rustc dev guide
[#6787](https://github.com/rust-lang/rust-clippy/pull/6787)
### ICE Fixes
* [`zero_sized_map_values`]
[#6866](https://github.com/rust-lang/rust-clippy/pull/6866)
### Documentation Improvements
* [`useless_format`]: Improved the documentation example
[#6854](https://github.com/rust-lang/rust-clippy/pull/6854)
* Clippy's [`README.md`]: Includes a new subsection on running Clippy as a rustc wrapper
[#6782](https://github.com/rust-lang/rust-clippy/pull/6782)
### Others
* Running `cargo clippy` after `cargo check` now works as expected
(`cargo clippy` and `cargo check` no longer shares the same build cache)
[#6687](https://github.com/rust-lang/rust-clippy/pull/6687)
* Cargo now re-runs Clippy if arguments after `--` provided to `cargo clippy` are changed.
[#6834](https://github.com/rust-lang/rust-clippy/pull/6834)
* Extracted Clippy's `utils` module into the new `clippy_utils` crate
[#6756](https://github.com/rust-lang/rust-clippy/pull/6756)
* Clippy lintcheck tool improvements
[#6800](https://github.com/rust-lang/rust-clippy/pull/6800)
[#6735](https://github.com/rust-lang/rust-clippy/pull/6735)
[#6764](https://github.com/rust-lang/rust-clippy/pull/6764)
[#6708](https://github.com/rust-lang/rust-clippy/pull/6708)
[#6780](https://github.com/rust-lang/rust-clippy/pull/6780)
[#6686](https://github.com/rust-lang/rust-clippy/pull/6686)
## Rust 1.51
Released 2021-03-25
[View all 78 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2020-12-21T15%3A43%3A04Z..2021-02-03T04%3A21%3A10Z+base%3Amaster)
### New Lints
* [`upper_case_acronyms`]
[#6475](https://github.com/rust-lang/rust-clippy/pull/6475)
* [`from_over_into`] [#6476](https://github.com/rust-lang/rust-clippy/pull/6476)
* [`case_sensitive_file_extension_comparisons`]
[#6500](https://github.com/rust-lang/rust-clippy/pull/6500)
* [`needless_question_mark`]
[#6507](https://github.com/rust-lang/rust-clippy/pull/6507)
* [`missing_panics_doc`]
[#6523](https://github.com/rust-lang/rust-clippy/pull/6523)
* [`redundant_slicing`]
[#6528](https://github.com/rust-lang/rust-clippy/pull/6528)
* [`vec_init_then_push`]
[#6538](https://github.com/rust-lang/rust-clippy/pull/6538)
* [`ptr_as_ptr`] [#6542](https://github.com/rust-lang/rust-clippy/pull/6542)
* [`collapsible_else_if`] (split out from `collapsible_if`)
[#6544](https://github.com/rust-lang/rust-clippy/pull/6544)
* [`inspect_for_each`] [#6577](https://github.com/rust-lang/rust-clippy/pull/6577)
* [`manual_filter_map`]
[#6591](https://github.com/rust-lang/rust-clippy/pull/6591)
* [`exhaustive_enums`]
[#6617](https://github.com/rust-lang/rust-clippy/pull/6617)
* [`exhaustive_structs`]
[#6617](https://github.com/rust-lang/rust-clippy/pull/6617)
### Moves and Deprecations
* Replace [`find_map`] with [`manual_find_map`]
[#6591](https://github.com/rust-lang/rust-clippy/pull/6591)
* `unknown_clippy_lints` Now integrated in the `unknown_lints` rustc lint
[#6653](https://github.com/rust-lang/rust-clippy/pull/6653)
### Enhancements
* [`ptr_arg`] Now also suggests to use `&Path` instead of `&PathBuf`
[#6506](https://github.com/rust-lang/rust-clippy/pull/6506)
* [`cast_ptr_alignment`] Also lint when the `pointer::cast` method is used
[#6557](https://github.com/rust-lang/rust-clippy/pull/6557)
* [`collapsible_match`] Now also deals with `&` and `*` operators in the `match`
scrutinee [#6619](https://github.com/rust-lang/rust-clippy/pull/6619)
### False Positive Fixes
* [`similar_names`] Ignore underscore prefixed names
[#6403](https://github.com/rust-lang/rust-clippy/pull/6403)
* [`print_literal`] and [`write_literal`] No longer lint numeric literals
[#6408](https://github.com/rust-lang/rust-clippy/pull/6408)
* [`large_enum_variant`] No longer lints in external macros
[#6485](https://github.com/rust-lang/rust-clippy/pull/6485)
* [`empty_enum`] Only lint if `never_type` feature is enabled
[#6513](https://github.com/rust-lang/rust-clippy/pull/6513)
* [`field_reassign_with_default`] No longer lints in macros
[#6553](https://github.com/rust-lang/rust-clippy/pull/6553)
* [`size_of_in_element_count`] No longer lints when dividing by element size
[#6578](https://github.com/rust-lang/rust-clippy/pull/6578)
* [`needless_return`] No longer lints in macros
[#6586](https://github.com/rust-lang/rust-clippy/pull/6586)
* [`match_overlapping_arm`] No longer lint when first arm is completely included
in second arm [#6603](https://github.com/rust-lang/rust-clippy/pull/6603)
* [`doc_markdown`] Add `WebGL` to the default configuration as an allowed
identifier [#6605](https://github.com/rust-lang/rust-clippy/pull/6605)
### Suggestion Fixes/Improvements
* [`field_reassign_with_default`] Don't expand macro in lint suggestion
[#6531](https://github.com/rust-lang/rust-clippy/pull/6531)
* [`match_like_matches_macro`] Strip references in suggestion
[#6532](https://github.com/rust-lang/rust-clippy/pull/6532)
* [`single_match`] Suggest `if` over `if let` when possible
[#6574](https://github.com/rust-lang/rust-clippy/pull/6574)
* `ref_in_deref` Use parentheses correctly in suggestion
[#6609](https://github.com/rust-lang/rust-clippy/pull/6609)
* [`stable_sort_primitive`] Clarify error message
[#6611](https://github.com/rust-lang/rust-clippy/pull/6611)
### ICE Fixes
* [`zero_sized_map_values`]
[#6582](https://github.com/rust-lang/rust-clippy/pull/6582)
### Documentation Improvements
* Improve search performance on the Clippy website and make it possible to
directly search for lints on the GitHub issue tracker
[#6483](https://github.com/rust-lang/rust-clippy/pull/6483)
* Clean up `README.md` by removing outdated paragraph
[#6488](https://github.com/rust-lang/rust-clippy/pull/6488)
* [`await_holding_refcell_ref`] and [`await_holding_lock`]
[#6585](https://github.com/rust-lang/rust-clippy/pull/6585)
* [`as_conversions`] [#6608](https://github.com/rust-lang/rust-clippy/pull/6608)
### Others
* Clippy now has a [Roadmap] for 2021. If you like to get involved in a bigger
project, take a look at the [Roadmap project page]. All issues listed there
are actively mentored
[#6462](https://github.com/rust-lang/rust-clippy/pull/6462)
* The Clippy version number now corresponds to the Rust version number
[#6526](https://github.com/rust-lang/rust-clippy/pull/6526)
* Fix oversight which caused Clippy to lint deps in some environments, where
`CLIPPY_TESTS=true` was set somewhere
[#6575](https://github.com/rust-lang/rust-clippy/pull/6575)
* Add `cargo dev-lintcheck` tool to the Clippy Dev Tool
[#6469](https://github.com/rust-lang/rust-clippy/pull/6469)
[Roadmap]: https://github.com/rust-lang/rust-clippy/blob/master/book/src/development/proposals/roadmap-2021.md
[Roadmap project page]: https://github.com/rust-lang/rust-clippy/projects/3
## Rust 1.50
Released 2021-02-11
[View all 119 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2020-11-06T18%3A32%3A40Z..2021-01-03T14%3A51%3A18Z+base%3Amaster)
### New Lints
* [`suspicious_operation_groupings`] [#6086](https://github.com/rust-lang/rust-clippy/pull/6086)
* [`size_of_in_element_count`] [#6394](https://github.com/rust-lang/rust-clippy/pull/6394)
* [`unnecessary_wraps`] [#6070](https://github.com/rust-lang/rust-clippy/pull/6070)
* [`let_underscore_drop`] [#6305](https://github.com/rust-lang/rust-clippy/pull/6305)
* [`collapsible_match`] [#6402](https://github.com/rust-lang/rust-clippy/pull/6402)
* [`redundant_else`] [#6330](https://github.com/rust-lang/rust-clippy/pull/6330)
* [`zero_sized_map_values`] [#6218](https://github.com/rust-lang/rust-clippy/pull/6218)
* [`print_stderr`] [#6367](https://github.com/rust-lang/rust-clippy/pull/6367)
* [`string_from_utf8_as_bytes`] [#6134](https://github.com/rust-lang/rust-clippy/pull/6134)
### Moves and Deprecations
* Previously deprecated [`str_to_string`] and [`string_to_string`] have been un-deprecated
as `restriction` lints [#6333](https://github.com/rust-lang/rust-clippy/pull/6333)
* Deprecate `panic_params` lint. This is now available in rustc as `non_fmt_panics`
[#6351](https://github.com/rust-lang/rust-clippy/pull/6351)
* Move [`map_err_ignore`] to `restriction`
[#6416](https://github.com/rust-lang/rust-clippy/pull/6416)
* Move [`await_holding_refcell_ref`] to `pedantic`
[#6354](https://github.com/rust-lang/rust-clippy/pull/6354)
* Move [`await_holding_lock`] to `pedantic`
[#6354](https://github.com/rust-lang/rust-clippy/pull/6354)
### Enhancements
* Add the `unreadable-literal-lint-fractions` configuration to disable
the `unreadable_literal` lint for fractions
[#6421](https://github.com/rust-lang/rust-clippy/pull/6421)
* [`clone_on_copy`]: Now shows the type in the lint message
[#6443](https://github.com/rust-lang/rust-clippy/pull/6443)
* [`redundant_pattern_matching`]: Now also lints on `std::task::Poll`
[#6339](https://github.com/rust-lang/rust-clippy/pull/6339)
* [`redundant_pattern_matching`]: Additionally also lints on `std::net::IpAddr`
[#6377](https://github.com/rust-lang/rust-clippy/pull/6377)
* [`search_is_some`]: Now suggests `contains` instead of `find(foo).is_some()`
[#6119](https://github.com/rust-lang/rust-clippy/pull/6119)
* [`clone_double_ref`]: Now prints the reference type in the lint message
[#6442](https://github.com/rust-lang/rust-clippy/pull/6442)
* [`modulo_one`]: Now also lints on -1.
[#6360](https://github.com/rust-lang/rust-clippy/pull/6360)
* [`empty_loop`]: Now lints no_std crates, too
[#6205](https://github.com/rust-lang/rust-clippy/pull/6205)
* [`or_fun_call`]: Now also lints when indexing `HashMap` or `BTreeMap`
[#6267](https://github.com/rust-lang/rust-clippy/pull/6267)
* [`wrong_self_convention`]: Now also lints in trait definitions
[#6316](https://github.com/rust-lang/rust-clippy/pull/6316)
* [`needless_borrow`]: Print the type in the lint message
[#6449](https://github.com/rust-lang/rust-clippy/pull/6449)
[msrv_readme]: https://github.com/rust-lang/rust-clippy#specifying-the-minimum-supported-rust-version
### False Positive Fixes
* [`manual_range_contains`]: No longer lints in `const fn`
[#6382](https://github.com/rust-lang/rust-clippy/pull/6382)
* [`unnecessary_lazy_evaluations`]: No longer lints if closure argument is used
[#6370](https://github.com/rust-lang/rust-clippy/pull/6370)
* [`match_single_binding`]: Now ignores cases with `#[cfg()]` macros
[#6435](https://github.com/rust-lang/rust-clippy/pull/6435)
* [`match_like_matches_macro`]: No longer lints on arms with attributes
[#6290](https://github.com/rust-lang/rust-clippy/pull/6290)
* [`map_clone`]: No longer lints with deref and clone
[#6269](https://github.com/rust-lang/rust-clippy/pull/6269)
* [`map_clone`]: No longer lints in the case of &mut
[#6301](https://github.com/rust-lang/rust-clippy/pull/6301)
* [`needless_update`]: Now ignores `non_exhaustive` structs
[#6464](https://github.com/rust-lang/rust-clippy/pull/6464)
* [`needless_collect`]: No longer lints when a collect is needed multiple times
[#6313](https://github.com/rust-lang/rust-clippy/pull/6313)
* [`unnecessary_cast`] No longer lints cfg-dependent types
[#6369](https://github.com/rust-lang/rust-clippy/pull/6369)
* [`declare_interior_mutable_const`] and [`borrow_interior_mutable_const`]:
Both now ignore enums with frozen variants
[#6110](https://github.com/rust-lang/rust-clippy/pull/6110)
* [`field_reassign_with_default`] No longer lint for private fields
[#6537](https://github.com/rust-lang/rust-clippy/pull/6537)
### Suggestion Fixes/Improvements
* [`vec_box`]: Provide correct type scope suggestion
[#6271](https://github.com/rust-lang/rust-clippy/pull/6271)
* [`manual_range_contains`]: Give correct suggestion when using floats
[#6320](https://github.com/rust-lang/rust-clippy/pull/6320)
* [`unnecessary_lazy_evaluations`]: Don't always mark suggestion as MachineApplicable
[#6272](https://github.com/rust-lang/rust-clippy/pull/6272)
* [`manual_async_fn`]: Improve suggestion formatting
[#6294](https://github.com/rust-lang/rust-clippy/pull/6294)
* [`unnecessary_cast`]: Fix incorrectly formatted float literal suggestion
[#6362](https://github.com/rust-lang/rust-clippy/pull/6362)
### ICE Fixes
* Fix a crash in [`from_iter_instead_of_collect`]
[#6304](https://github.com/rust-lang/rust-clippy/pull/6304)
* Fix a silent crash when parsing doc comments in [`needless_doctest_main`]
[#6458](https://github.com/rust-lang/rust-clippy/pull/6458)
### Documentation Improvements
* The lint website search has been improved ([#6477](https://github.com/rust-lang/rust-clippy/pull/6477)):
* Searching for lints with dashes and spaces is possible now. For example
`missing-errors-doc` and `missing errors doc` are now valid aliases for lint names
* Improved fuzzy search in lint descriptions
* Various README improvements
[#6287](https://github.com/rust-lang/rust-clippy/pull/6287)
* Add known problems to [`comparison_chain`] documentation
[#6390](https://github.com/rust-lang/rust-clippy/pull/6390)
* Fix example used in [`cargo_common_metadata`]
[#6293](https://github.com/rust-lang/rust-clippy/pull/6293)
* Improve [`map_clone`] documentation
[#6340](https://github.com/rust-lang/rust-clippy/pull/6340)
### Others
* You can now tell Clippy about the MSRV your project supports. Please refer to
the specific README section to learn more about MSRV support [here][msrv_readme]
[#6201](https://github.com/rust-lang/rust-clippy/pull/6201)
* Add `--no-deps` option to avoid running on path dependencies in workspaces
[#6188](https://github.com/rust-lang/rust-clippy/pull/6188)
## Rust 1.49
Released 2020-12-31
[View all 107 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2020-09-24T14%3A05%3A12Z..2020-11-05T13%3A35%3A44Z+base%3Amaster)
### New Lints
* [`field_reassign_with_default`] [#5911](https://github.com/rust-lang/rust-clippy/pull/5911)
* [`await_holding_refcell_ref`] [#6029](https://github.com/rust-lang/rust-clippy/pull/6029)
* [`disallowed_methods`] [#6081](https://github.com/rust-lang/rust-clippy/pull/6081)
* [`inline_asm_x86_att_syntax`] [#6092](https://github.com/rust-lang/rust-clippy/pull/6092)
* [`inline_asm_x86_intel_syntax`] [#6092](https://github.com/rust-lang/rust-clippy/pull/6092)
* [`from_iter_instead_of_collect`] [#6101](https://github.com/rust-lang/rust-clippy/pull/6101)
* [`mut_mutex_lock`] [#6103](https://github.com/rust-lang/rust-clippy/pull/6103)
* [`single_element_loop`] [#6109](https://github.com/rust-lang/rust-clippy/pull/6109)
* [`manual_unwrap_or`] [#6123](https://github.com/rust-lang/rust-clippy/pull/6123)
* [`large_types_passed_by_value`] [#6135](https://github.com/rust-lang/rust-clippy/pull/6135)
* [`result_unit_err`] [#6157](https://github.com/rust-lang/rust-clippy/pull/6157)
* [`ref_option_ref`] [#6165](https://github.com/rust-lang/rust-clippy/pull/6165)
* [`manual_range_contains`] [#6177](https://github.com/rust-lang/rust-clippy/pull/6177)
* [`unusual_byte_groupings`] [#6183](https://github.com/rust-lang/rust-clippy/pull/6183)
* [`comparison_to_empty`] [#6226](https://github.com/rust-lang/rust-clippy/pull/6226)
* [`map_collect_result_unit`] [#6227](https://github.com/rust-lang/rust-clippy/pull/6227)
* [`manual_ok_or`] [#6233](https://github.com/rust-lang/rust-clippy/pull/6233)
### Moves and Deprecations
* Rename `single_char_push_str` to [`single_char_add_str`]
[#6037](https://github.com/rust-lang/rust-clippy/pull/6037)
* Rename `zero_width_space` to [`invisible_characters`]
[#6105](https://github.com/rust-lang/rust-clippy/pull/6105)
* Deprecate `drop_bounds` (uplifted)
[#6111](https://github.com/rust-lang/rust-clippy/pull/6111)
* Move [`string_lit_as_bytes`] to `nursery`
[#6117](https://github.com/rust-lang/rust-clippy/pull/6117)
* Move [`rc_buffer`] to `restriction`
[#6128](https://github.com/rust-lang/rust-clippy/pull/6128)
### Enhancements
* [`manual_memcpy`]: Also lint when there are loop counters (and produce a
reliable suggestion)
[#5727](https://github.com/rust-lang/rust-clippy/pull/5727)
* [`single_char_add_str`]: Also lint on `String::insert_str`
[#6037](https://github.com/rust-lang/rust-clippy/pull/6037)
* [`invisible_characters`]: Also lint the characters `\u{AD}` and `\u{2060}`
[#6105](https://github.com/rust-lang/rust-clippy/pull/6105)
* [`eq_op`]: Also lint on the `assert_*!` macro family
[#6167](https://github.com/rust-lang/rust-clippy/pull/6167)
* [`items_after_statements`]: Also lint in local macro expansions
[#6176](https://github.com/rust-lang/rust-clippy/pull/6176)
* [`unnecessary_cast`]: Also lint casts on integer and float literals
[#6187](https://github.com/rust-lang/rust-clippy/pull/6187)
* [`manual_unwrap_or`]: Also lint `Result::unwrap_or`
[#6190](https://github.com/rust-lang/rust-clippy/pull/6190)
* [`match_like_matches_macro`]: Also lint when `match` has more than two arms
[#6216](https://github.com/rust-lang/rust-clippy/pull/6216)
* [`integer_arithmetic`]: Better handle `/` an `%` operators
[#6229](https://github.com/rust-lang/rust-clippy/pull/6229)
### False Positive Fixes
* [`needless_lifetimes`]: Bail out if the function has a `where` clause with the
lifetime [#5978](https://github.com/rust-lang/rust-clippy/pull/5978)
* [`explicit_counter_loop`]: No longer lints, when loop counter is used after it
is incremented [#6076](https://github.com/rust-lang/rust-clippy/pull/6076)
* [`or_fun_call`]: Revert changes addressing the handling of `const fn`
[#6077](https://github.com/rust-lang/rust-clippy/pull/6077)
* [`needless_range_loop`]: No longer lints, when the iterable is used in the
range [#6102](https://github.com/rust-lang/rust-clippy/pull/6102)
* [`inconsistent_digit_grouping`]: Fix bug when using floating point exponent
[#6104](https://github.com/rust-lang/rust-clippy/pull/6104)
* [`mistyped_literal_suffixes`]: No longer lints on the fractional part of a
float (e.g. `713.32_64`)
[#6114](https://github.com/rust-lang/rust-clippy/pull/6114)
* [`invalid_regex`]: No longer lint on unicode characters within `bytes::Regex`
[#6132](https://github.com/rust-lang/rust-clippy/pull/6132)
* [`boxed_local`]: No longer lints on `extern fn` arguments
[#6133](https://github.com/rust-lang/rust-clippy/pull/6133)
* [`needless_lifetimes`]: Fix regression, where lifetime is used in `where`
clause [#6198](https://github.com/rust-lang/rust-clippy/pull/6198)
### Suggestion Fixes/Improvements
* [`unnecessary_sort_by`]: Avoid dereferencing the suggested closure parameter
[#6078](https://github.com/rust-lang/rust-clippy/pull/6078)
* [`needless_arbitrary_self_type`]: Correctly handle expanded code
[#6093](https://github.com/rust-lang/rust-clippy/pull/6093)
* [`useless_format`]: Preserve raw strings in suggestion
[#6151](https://github.com/rust-lang/rust-clippy/pull/6151)
* [`empty_loop`]: Suggest alternatives
[#6162](https://github.com/rust-lang/rust-clippy/pull/6162)
* [`borrowed_box`]: Correctly add parentheses in suggestion
[#6200](https://github.com/rust-lang/rust-clippy/pull/6200)
* [`unused_unit`]: Improve suggestion formatting
[#6247](https://github.com/rust-lang/rust-clippy/pull/6247)
### Documentation Improvements
* Some doc improvements:
* [`rc_buffer`] [#6090](https://github.com/rust-lang/rust-clippy/pull/6090)
* [`empty_loop`] [#6162](https://github.com/rust-lang/rust-clippy/pull/6162)
* [`doc_markdown`]: Document problematic link text style
[#6107](https://github.com/rust-lang/rust-clippy/pull/6107)
## Rust 1.48
Released 2020-11-19
[View all 99 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2020-08-11T13%3A14%3A38Z..2020-09-23T18%3A55%3A22Z+base%3Amaster)
### New lints
* [`self_assignment`] [#5894](https://github.com/rust-lang/rust-clippy/pull/5894)
* [`unnecessary_lazy_evaluations`] [#5720](https://github.com/rust-lang/rust-clippy/pull/5720)
* [`manual_strip`] [#6038](https://github.com/rust-lang/rust-clippy/pull/6038)
* [`map_err_ignore`] [#5998](https://github.com/rust-lang/rust-clippy/pull/5998)
* [`rc_buffer`] [#6044](https://github.com/rust-lang/rust-clippy/pull/6044)
* `to_string_in_display` [#5831](https://github.com/rust-lang/rust-clippy/pull/5831)
* `single_char_push_str` [#5881](https://github.com/rust-lang/rust-clippy/pull/5881)
### Moves and Deprecations
* Downgrade [`verbose_bit_mask`] to pedantic
[#6036](https://github.com/rust-lang/rust-clippy/pull/6036)
### Enhancements
* Extend [`precedence`] to handle chains of methods combined with unary negation
[#5928](https://github.com/rust-lang/rust-clippy/pull/5928)
* [`useless_vec`]: add a configuration value for the maximum allowed size on the stack
[#5907](https://github.com/rust-lang/rust-clippy/pull/5907)
* [`suspicious_arithmetic_impl`]: extend to implementations of `BitAnd`, `BitOr`, `BitXor`, `Rem`, `Shl`, and `Shr`
[#5884](https://github.com/rust-lang/rust-clippy/pull/5884)
* `invalid_atomic_ordering`: detect misuse of `compare_exchange`, `compare_exchange_weak`, and `fetch_update`
[#6025](https://github.com/rust-lang/rust-clippy/pull/6025)
* Avoid [`redundant_pattern_matching`] triggering in macros
[#6069](https://github.com/rust-lang/rust-clippy/pull/6069)
* [`option_if_let_else`]: distinguish pure from impure `else` expressions
[#5937](https://github.com/rust-lang/rust-clippy/pull/5937)
* [`needless_doctest_main`]: parse doctests instead of using textual search
[#5912](https://github.com/rust-lang/rust-clippy/pull/5912)
* [`wildcard_imports`]: allow `prelude` to appear in any segment of an import
[#5929](https://github.com/rust-lang/rust-clippy/pull/5929)
* Re-enable [`len_zero`] for ranges now that `range_is_empty` is stable
[#5961](https://github.com/rust-lang/rust-clippy/pull/5961)
* [`option_as_ref_deref`]: catch fully-qualified calls to `Deref::deref` and `DerefMut::deref_mut`
[#5933](https://github.com/rust-lang/rust-clippy/pull/5933)
### False Positive Fixes
* [`useless_attribute`]: permit allowing [`wildcard_imports`] and [`enum_glob_use`]
[#5994](https://github.com/rust-lang/rust-clippy/pull/5994)
* [`transmute_ptr_to_ptr`]: avoid suggesting dereferencing raw pointers in const contexts
[#5999](https://github.com/rust-lang/rust-clippy/pull/5999)
* [`redundant_closure_call`]: take into account usages of the closure in nested functions and closures
[#5920](https://github.com/rust-lang/rust-clippy/pull/5920)
* Fix false positive in [`borrow_interior_mutable_const`] when referencing a field behind a pointer
[#5949](https://github.com/rust-lang/rust-clippy/pull/5949)
* [`doc_markdown`]: allow using "GraphQL" without backticks
[#5996](https://github.com/rust-lang/rust-clippy/pull/5996)
* `to_string_in_display`: avoid linting when calling `to_string()` on anything that is not `self`
[#5971](https://github.com/rust-lang/rust-clippy/pull/5971)
* [`indexing_slicing`] and [`out_of_bounds_indexing`] treat references to arrays as arrays
[#6034](https://github.com/rust-lang/rust-clippy/pull/6034)
* [`should_implement_trait`]: ignore methods with lifetime parameters
[#5725](https://github.com/rust-lang/rust-clippy/pull/5725)
* [`needless_return`]: avoid linting if a temporary borrows a local variable
[#5903](https://github.com/rust-lang/rust-clippy/pull/5903)
* Restrict [`unnecessary_sort_by`] to non-reference, Copy types
[#6006](https://github.com/rust-lang/rust-clippy/pull/6006)
* Avoid suggesting `from_bits`/`to_bits` in const contexts in [`transmute_int_to_float`]
[#5919](https://github.com/rust-lang/rust-clippy/pull/5919)
* [`declare_interior_mutable_const`] and [`borrow_interior_mutable_const`]: improve detection of interior mutable types
[#6046](https://github.com/rust-lang/rust-clippy/pull/6046)
### Suggestion Fixes/Improvements
* [`let_and_return`]: add a cast to the suggestion when the return expression has adjustments
[#5946](https://github.com/rust-lang/rust-clippy/pull/5946)
* [`useless_conversion`]: show the type in the error message
[#6035](https://github.com/rust-lang/rust-clippy/pull/6035)
* [`unnecessary_mut_passed`]: discriminate between functions and methods in the error message
[#5892](https://github.com/rust-lang/rust-clippy/pull/5892)
* [`float_cmp`] and [`float_cmp_const`]: change wording to make margin of error less ambiguous
[#6043](https://github.com/rust-lang/rust-clippy/pull/6043)
* [`default_trait_access`]: do not use unnecessary type parameters in the suggestion
[#5993](https://github.com/rust-lang/rust-clippy/pull/5993)
* [`collapsible_if`]: don't use expanded code in the suggestion
[#5992](https://github.com/rust-lang/rust-clippy/pull/5992)
* Do not suggest empty format strings in [`print_with_newline`] and [`write_with_newline`]
[#6042](https://github.com/rust-lang/rust-clippy/pull/6042)
* [`unit_arg`]: improve the readability of the suggestion
[#5931](https://github.com/rust-lang/rust-clippy/pull/5931)
* [`stable_sort_primitive`]: print the type that is being sorted in the lint message
[#5935](https://github.com/rust-lang/rust-clippy/pull/5935)
* Show line count and max lines in [`too_many_lines`] lint message
[#6009](https://github.com/rust-lang/rust-clippy/pull/6009)
* Keep parentheses in the suggestion of [`useless_conversion`] where applicable
[#5900](https://github.com/rust-lang/rust-clippy/pull/5900)
* [`option_map_unit_fn`] and [`result_map_unit_fn`]: print the unit type `()` explicitly
[#6024](https://github.com/rust-lang/rust-clippy/pull/6024)
* [`redundant_allocation`]: suggest replacing `Rc<Box<T>>` with `Rc<T>`
[#5899](https://github.com/rust-lang/rust-clippy/pull/5899)
* Make lint messages adhere to rustc dev guide conventions
[#5893](https://github.com/rust-lang/rust-clippy/pull/5893)
### ICE Fixes
* Fix ICE in [`repeat_once`]
[#5948](https://github.com/rust-lang/rust-clippy/pull/5948)
### Documentation Improvements
* [`mutable_key_type`]: explain potential for false positives when the interior mutable type is not accessed in the `Hash` implementation
[#6019](https://github.com/rust-lang/rust-clippy/pull/6019)
* [`unnecessary_mut_passed`]: fix typo
[#5913](https://github.com/rust-lang/rust-clippy/pull/5913)
* Add example of false positive to [`ptr_arg`] docs.
[#5885](https://github.com/rust-lang/rust-clippy/pull/5885)
* [`box_vec`](https://rust-lang.github.io/rust-clippy/master/index.html#box_collection), [`vec_box`] and [`borrowed_box`]: add link to the documentation of `Box`
[#6023](https://github.com/rust-lang/rust-clippy/pull/6023)
## Rust 1.47
Released 2020-10-08
[View all 76 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2020-06-23T16%3A27%3A11Z..2020-08-11T12%3A52%3A41Z+base%3Amaster)
### New lints
* [`derive_ord_xor_partial_ord`] [#5848](https://github.com/rust-lang/rust-clippy/pull/5848)
* [`trait_duplication_in_bounds`] [#5852](https://github.com/rust-lang/rust-clippy/pull/5852)
* [`map_identity`] [#5694](https://github.com/rust-lang/rust-clippy/pull/5694)
* [`unit_return_expecting_ord`] [#5737](https://github.com/rust-lang/rust-clippy/pull/5737)
* [`pattern_type_mismatch`] [#4841](https://github.com/rust-lang/rust-clippy/pull/4841)
* [`repeat_once`] [#5773](https://github.com/rust-lang/rust-clippy/pull/5773)
* [`same_item_push`] [#5825](https://github.com/rust-lang/rust-clippy/pull/5825)
* [`needless_arbitrary_self_type`] [#5869](https://github.com/rust-lang/rust-clippy/pull/5869)
* [`match_like_matches_macro`] [#5769](https://github.com/rust-lang/rust-clippy/pull/5769)
* [`stable_sort_primitive`] [#5809](https://github.com/rust-lang/rust-clippy/pull/5809)
* [`blanket_clippy_restriction_lints`] [#5750](https://github.com/rust-lang/rust-clippy/pull/5750)
* [`option_if_let_else`] [#5301](https://github.com/rust-lang/rust-clippy/pull/5301)
### Moves and Deprecations
* Deprecate [`regex_macro`] lint
[#5760](https://github.com/rust-lang/rust-clippy/pull/5760)
* Move [`range_minus_one`] to `pedantic`
[#5752](https://github.com/rust-lang/rust-clippy/pull/5752)
### Enhancements
* Improve [`needless_collect`] by catching `collect` calls followed by `iter` or `into_iter` calls
[#5837](https://github.com/rust-lang/rust-clippy/pull/5837)
* [`panic`], [`todo`], [`unimplemented`] and [`unreachable`] now detect calls with formatting
[#5811](https://github.com/rust-lang/rust-clippy/pull/5811)
* Detect more cases of [`suboptimal_flops`] and [`imprecise_flops`]
[#5443](https://github.com/rust-lang/rust-clippy/pull/5443)
* Handle asymmetrical implementations of `PartialEq` in [`cmp_owned`]
[#5701](https://github.com/rust-lang/rust-clippy/pull/5701)
* Make it possible to allow [`unsafe_derive_deserialize`]
[#5870](https://github.com/rust-lang/rust-clippy/pull/5870)
* Catch `ord.min(a).max(b)` where a < b in [`min_max`]
[#5871](https://github.com/rust-lang/rust-clippy/pull/5871)
* Make [`clone_on_copy`] suggestion machine applicable
[#5745](https://github.com/rust-lang/rust-clippy/pull/5745)
* Enable [`len_zero`] on ranges now that `is_empty` is stable on them
[#5961](https://github.com/rust-lang/rust-clippy/pull/5961)
### False Positive Fixes
* Avoid triggering [`or_fun_call`] with const fns that take no arguments
[#5889](https://github.com/rust-lang/rust-clippy/pull/5889)
* Fix [`redundant_closure_call`] false positive for closures that have multiple calls
[#5800](https://github.com/rust-lang/rust-clippy/pull/5800)
* Don't lint cases involving `ManuallyDrop` in [`redundant_clone`]
[#5824](https://github.com/rust-lang/rust-clippy/pull/5824)
* Treat a single expression the same as a single statement in the 2nd arm of a match in [`single_match_else`]
[#5771](https://github.com/rust-lang/rust-clippy/pull/5771)
* Don't trigger [`unnested_or_patterns`] if the feature `or_patterns` is not enabled
[#5758](https://github.com/rust-lang/rust-clippy/pull/5758)
* Avoid linting if key borrows in [`unnecessary_sort_by`]
[#5756](https://github.com/rust-lang/rust-clippy/pull/5756)
* Consider `Try` impl for `Poll` when generating suggestions in [`try_err`]
[#5857](https://github.com/rust-lang/rust-clippy/pull/5857)
* Take input lifetimes into account in `manual_async_fn`
[#5859](https://github.com/rust-lang/rust-clippy/pull/5859)
* Fix multiple false positives in [`type_repetition_in_bounds`] and add a configuration option
[#5761](https://github.com/rust-lang/rust-clippy/pull/5761)
* Limit the [`suspicious_arithmetic_impl`] lint to one binary operation
[#5820](https://github.com/rust-lang/rust-clippy/pull/5820)
### Suggestion Fixes/Improvements
* Improve readability of [`shadow_unrelated`] suggestion by truncating the RHS snippet
[#5788](https://github.com/rust-lang/rust-clippy/pull/5788)
* Suggest `filter_map` instead of `flat_map` when mapping to `Option` in [`map_flatten`]
[#5846](https://github.com/rust-lang/rust-clippy/pull/5846)
* Ensure suggestion is shown correctly for long method call chains in [`iter_nth_zero`]
[#5793](https://github.com/rust-lang/rust-clippy/pull/5793)
* Drop borrow operator in suggestions of [`redundant_pattern_matching`]
[#5815](https://github.com/rust-lang/rust-clippy/pull/5815)
* Add suggestion for [`iter_skip_next`]
[#5843](https://github.com/rust-lang/rust-clippy/pull/5843)
* Improve [`collapsible_if`] fix suggestion
[#5732](https://github.com/rust-lang/rust-clippy/pull/5732)
### ICE Fixes
* Fix ICE caused by [`needless_collect`]
[#5877](https://github.com/rust-lang/rust-clippy/pull/5877)
* Fix ICE caused by [`unnested_or_patterns`]
[#5784](https://github.com/rust-lang/rust-clippy/pull/5784)
### Documentation Improvements
* Fix grammar of [`await_holding_lock`] documentation
[#5748](https://github.com/rust-lang/rust-clippy/pull/5748)
### Others
* Make lints adhere to the rustc dev guide
[#5888](https://github.com/rust-lang/rust-clippy/pull/5888)
## Rust 1.46
Released 2020-08-27
[View all 48 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2020-05-31T12%3A50%3A53Z..2020-06-23T15%3A00%3A32Z+base%3Amaster)
### New lints
* [`unnested_or_patterns`] [#5378](https://github.com/rust-lang/rust-clippy/pull/5378)
* [`iter_next_slice`] [#5597](https://github.com/rust-lang/rust-clippy/pull/5597)
* [`unnecessary_sort_by`] [#5623](https://github.com/rust-lang/rust-clippy/pull/5623)
* [`vec_resize_to_zero`] [#5637](https://github.com/rust-lang/rust-clippy/pull/5637)
### Moves and Deprecations
* Move [`cast_ptr_alignment`] to pedantic [#5667](https://github.com/rust-lang/rust-clippy/pull/5667)
### Enhancements
* Improve [`mem_replace_with_uninit`] lint [#5695](https://github.com/rust-lang/rust-clippy/pull/5695)
### False Positive Fixes
* [`len_zero`]: Avoid linting ranges when the `range_is_empty` feature is not enabled
[#5656](https://github.com/rust-lang/rust-clippy/pull/5656)
* [`let_and_return`]: Don't lint if a temporary borrow is involved
[#5680](https://github.com/rust-lang/rust-clippy/pull/5680)
* [`reversed_empty_ranges`]: Avoid linting `N..N` in for loop arguments in
[#5692](https://github.com/rust-lang/rust-clippy/pull/5692)
* [`if_same_then_else`]: Don't assume multiplication is always commutative
[#5702](https://github.com/rust-lang/rust-clippy/pull/5702)
* [`disallowed_names`]: Remove `bar` from the default configuration
[#5712](https://github.com/rust-lang/rust-clippy/pull/5712)
* [`redundant_pattern_matching`]: Avoid suggesting non-`const fn` calls in const contexts
[#5724](https://github.com/rust-lang/rust-clippy/pull/5724)
### Suggestion Fixes/Improvements
* Fix suggestion of [`unit_arg`] lint, so that it suggest semantic equivalent code
[#4455](https://github.com/rust-lang/rust-clippy/pull/4455)
* Add auto applicable suggestion to [`macro_use_imports`]
[#5279](https://github.com/rust-lang/rust-clippy/pull/5279)
### ICE Fixes
* Fix ICE in the `consts` module of Clippy [#5709](https://github.com/rust-lang/rust-clippy/pull/5709)
### Documentation Improvements
* Improve code examples across multiple lints [#5664](https://github.com/rust-lang/rust-clippy/pull/5664)
### Others
* Introduce a `--rustc` flag to `clippy-driver`, which turns `clippy-driver`
into `rustc` and passes all the given arguments to `rustc`. This is especially
useful for tools that need the `rustc` version Clippy was compiled with,
instead of the Clippy version. E.g. `clippy-driver --rustc --version` will
print the output of `rustc --version`.
[#5178](https://github.com/rust-lang/rust-clippy/pull/5178)
* New issue templates now make it easier to complain if Clippy is too annoying
or not annoying enough! [#5735](https://github.com/rust-lang/rust-clippy/pull/5735)
## Rust 1.45
Released 2020-07-16
[View all 81 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2020-04-18T20%3A18%3A04Z..2020-05-27T19%3A25%3A04Z+base%3Amaster)
### New lints
* [`match_wildcard_for_single_variants`] [#5582](https://github.com/rust-lang/rust-clippy/pull/5582)
* [`unsafe_derive_deserialize`] [#5493](https://github.com/rust-lang/rust-clippy/pull/5493)
* [`if_let_mutex`] [#5332](https://github.com/rust-lang/rust-clippy/pull/5332)
* [`mismatched_target_os`] [#5506](https://github.com/rust-lang/rust-clippy/pull/5506)
* [`await_holding_lock`] [#5439](https://github.com/rust-lang/rust-clippy/pull/5439)
* [`match_on_vec_items`] [#5522](https://github.com/rust-lang/rust-clippy/pull/5522)
* [`manual_async_fn`] [#5576](https://github.com/rust-lang/rust-clippy/pull/5576)
* [`reversed_empty_ranges`] [#5583](https://github.com/rust-lang/rust-clippy/pull/5583)
* [`manual_non_exhaustive`] [#5550](https://github.com/rust-lang/rust-clippy/pull/5550)
### Moves and Deprecations
* Downgrade [`match_bool`] to pedantic [#5408](https://github.com/rust-lang/rust-clippy/pull/5408)
* Downgrade [`match_wild_err_arm`] to pedantic and update help messages. [#5622](https://github.com/rust-lang/rust-clippy/pull/5622)
* Downgrade [`useless_let_if_seq`] to nursery. [#5599](https://github.com/rust-lang/rust-clippy/pull/5599)
* Generalize `option_and_then_some` and rename to [`bind_instead_of_map`]. [#5529](https://github.com/rust-lang/rust-clippy/pull/5529)
* Rename `identity_conversion` to [`useless_conversion`]. [#5568](https://github.com/rust-lang/rust-clippy/pull/5568)
* Merge `block_in_if_condition_expr` and `block_in_if_condition_stmt` into [`blocks_in_if_conditions`].
[#5563](https://github.com/rust-lang/rust-clippy/pull/5563)
* Merge `option_map_unwrap_or`, `option_map_unwrap_or_else` and `result_map_unwrap_or_else` into [`map_unwrap_or`].
[#5563](https://github.com/rust-lang/rust-clippy/pull/5563)
* Merge `option_unwrap_used` and `result_unwrap_used` into [`unwrap_used`].
[#5563](https://github.com/rust-lang/rust-clippy/pull/5563)
* Merge `option_expect_used` and `result_expect_used` into [`expect_used`].
[#5563](https://github.com/rust-lang/rust-clippy/pull/5563)
* Merge `for_loop_over_option` and `for_loop_over_result` into [`for_loops_over_fallibles`].
[#5563](https://github.com/rust-lang/rust-clippy/pull/5563)
### Enhancements
* Avoid running cargo lints when not enabled to improve performance. [#5505](https://github.com/rust-lang/rust-clippy/pull/5505)
* Extend [`useless_conversion`] with `TryFrom` and `TryInto`. [#5631](https://github.com/rust-lang/rust-clippy/pull/5631)
* Lint also in type parameters and where clauses in [`unused_unit`]. [#5592](https://github.com/rust-lang/rust-clippy/pull/5592)
* Do not suggest deriving `Default` in [`new_without_default`]. [#5616](https://github.com/rust-lang/rust-clippy/pull/5616)
### False Positive Fixes
* [`while_let_on_iterator`] [#5525](https://github.com/rust-lang/rust-clippy/pull/5525)
* [`empty_line_after_outer_attr`] [#5609](https://github.com/rust-lang/rust-clippy/pull/5609)
* [`unnecessary_unwrap`] [#5558](https://github.com/rust-lang/rust-clippy/pull/5558)
* [`comparison_chain`] [#5596](https://github.com/rust-lang/rust-clippy/pull/5596)
* Don't trigger [`used_underscore_binding`] in await desugaring. [#5535](https://github.com/rust-lang/rust-clippy/pull/5535)
* Don't trigger [`borrowed_box`] on mutable references. [#5491](https://github.com/rust-lang/rust-clippy/pull/5491)
* Allow `1 << 0` in [`identity_op`]. [#5602](https://github.com/rust-lang/rust-clippy/pull/5602)
* Allow `use super::*;` glob imports in [`wildcard_imports`]. [#5564](https://github.com/rust-lang/rust-clippy/pull/5564)
* Whitelist more words in [`doc_markdown`]. [#5611](https://github.com/rust-lang/rust-clippy/pull/5611)
* Skip dev and build deps in [`multiple_crate_versions`]. [#5636](https://github.com/rust-lang/rust-clippy/pull/5636)
* Honor `allow` attribute on arguments in [`ptr_arg`]. [#5647](https://github.com/rust-lang/rust-clippy/pull/5647)
* Honor lint level attributes for [`redundant_field_names`], [`just_underscores_and_digits`], [`many_single_char_names`]
and [`similar_names`]. [#5651](https://github.com/rust-lang/rust-clippy/pull/5651)
* Ignore calls to `len` in [`or_fun_call`]. [#4429](https://github.com/rust-lang/rust-clippy/pull/4429)
### Suggestion Improvements
* Simplify suggestions in [`manual_memcpy`]. [#5536](https://github.com/rust-lang/rust-clippy/pull/5536)
* Fix suggestion in [`redundant_pattern_matching`] for macros. [#5511](https://github.com/rust-lang/rust-clippy/pull/5511)
* Avoid suggesting `copied()` for mutable references in [`map_clone`]. [#5530](https://github.com/rust-lang/rust-clippy/pull/5530)
* Improve help message for [`clone_double_ref`]. [#5547](https://github.com/rust-lang/rust-clippy/pull/5547)
### ICE Fixes
* Fix ICE caused in unwrap module. [#5590](https://github.com/rust-lang/rust-clippy/pull/5590)
* Fix ICE on rustc test issue-69020-assoc-const-arith-overflow.rs [#5499](https://github.com/rust-lang/rust-clippy/pull/5499)
### Documentation
* Clarify the documentation of [`unnecessary_mut_passed`]. [#5639](https://github.com/rust-lang/rust-clippy/pull/5639)
* Extend example for [`unneeded_field_pattern`]. [#5541](https://github.com/rust-lang/rust-clippy/pull/5541)
## Rust 1.44
Released 2020-06-04
[View all 124 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2020-03-05T17%3A30%3A53Z..2020-04-18T09%3A20%3A51Z+base%3Amaster)
### New lints
* [`explicit_deref_methods`] [#5226](https://github.com/rust-lang/rust-clippy/pull/5226)
* [`implicit_saturating_sub`] [#5427](https://github.com/rust-lang/rust-clippy/pull/5427)
* [`macro_use_imports`] [#5230](https://github.com/rust-lang/rust-clippy/pull/5230)
* [`verbose_file_reads`] [#5272](https://github.com/rust-lang/rust-clippy/pull/5272)
* [`future_not_send`] [#5423](https://github.com/rust-lang/rust-clippy/pull/5423)
* [`redundant_pub_crate`] [#5319](https://github.com/rust-lang/rust-clippy/pull/5319)
* [`large_const_arrays`] [#5248](https://github.com/rust-lang/rust-clippy/pull/5248)
* [`result_map_or_into_option`] [#5415](https://github.com/rust-lang/rust-clippy/pull/5415)
* [`redundant_allocation`] [#5349](https://github.com/rust-lang/rust-clippy/pull/5349)
* [`fn_address_comparisons`] [#5294](https://github.com/rust-lang/rust-clippy/pull/5294)
* [`vtable_address_comparisons`] [#5294](https://github.com/rust-lang/rust-clippy/pull/5294)
### Moves and Deprecations
* Deprecate [`replace_consts`] lint [#5380](https://github.com/rust-lang/rust-clippy/pull/5380)
* Move [`cognitive_complexity`] to nursery [#5428](https://github.com/rust-lang/rust-clippy/pull/5428)
* Move [`useless_transmute`] to nursery [#5364](https://github.com/rust-lang/rust-clippy/pull/5364)
* Downgrade [`inefficient_to_string`] to pedantic [#5412](https://github.com/rust-lang/rust-clippy/pull/5412)
* Downgrade [`option_option`] to pedantic [#5401](https://github.com/rust-lang/rust-clippy/pull/5401)
* Downgrade [`unreadable_literal`] to pedantic [#5419](https://github.com/rust-lang/rust-clippy/pull/5419)
* Downgrade [`let_unit_value`] to pedantic [#5409](https://github.com/rust-lang/rust-clippy/pull/5409)
* Downgrade [`trivially_copy_pass_by_ref`] to pedantic [#5410](https://github.com/rust-lang/rust-clippy/pull/5410)
* Downgrade [`implicit_hasher`] to pedantic [#5411](https://github.com/rust-lang/rust-clippy/pull/5411)
### Enhancements
* On _nightly_ you can now use `cargo clippy --fix -Z unstable-options` to
auto-fix lints that support this [#5363](https://github.com/rust-lang/rust-clippy/pull/5363)
* Make [`redundant_clone`] also trigger on cases where the cloned value is not
consumed. [#5304](https://github.com/rust-lang/rust-clippy/pull/5304)
* Expand [`integer_arithmetic`] to also disallow bit-shifting [#5430](https://github.com/rust-lang/rust-clippy/pull/5430)
* [`option_as_ref_deref`] now detects more deref cases [#5425](https://github.com/rust-lang/rust-clippy/pull/5425)
* [`large_enum_variant`] now report the sizes of the largest and second-largest variants [#5466](https://github.com/rust-lang/rust-clippy/pull/5466)
* [`bool_comparison`] now also checks for inequality comparisons that can be
written more concisely [#5365](https://github.com/rust-lang/rust-clippy/pull/5365)
* Expand [`clone_on_copy`] to work in method call arguments as well [#5441](https://github.com/rust-lang/rust-clippy/pull/5441)
* [`redundant_pattern_matching`] now also handles `while let` [#5483](https://github.com/rust-lang/rust-clippy/pull/5483)
* [`integer_arithmetic`] now also lints references of integers [#5329](https://github.com/rust-lang/rust-clippy/pull/5329)
* Expand [`float_cmp_const`] to also work on arrays [#5345](https://github.com/rust-lang/rust-clippy/pull/5345)
* Trigger [`map_flatten`] when map is called on an `Option` [#5473](https://github.com/rust-lang/rust-clippy/pull/5473)
### False Positive Fixes
* [`many_single_char_names`] [#5468](https://github.com/rust-lang/rust-clippy/pull/5468)
* [`should_implement_trait`] [#5437](https://github.com/rust-lang/rust-clippy/pull/5437)
* [`unused_self`] [#5387](https://github.com/rust-lang/rust-clippy/pull/5387)
* [`redundant_clone`] [#5453](https://github.com/rust-lang/rust-clippy/pull/5453)
* [`precedence`] [#5445](https://github.com/rust-lang/rust-clippy/pull/5445)
* [`suspicious_op_assign_impl`] [#5424](https://github.com/rust-lang/rust-clippy/pull/5424)
* [`needless_lifetimes`] [#5293](https://github.com/rust-lang/rust-clippy/pull/5293)
* [`redundant_pattern`] [#5287](https://github.com/rust-lang/rust-clippy/pull/5287)
* [`inconsistent_digit_grouping`] [#5451](https://github.com/rust-lang/rust-clippy/pull/5451)
### Suggestion Improvements
* Improved [`question_mark`] lint suggestion so that it doesn't add redundant `as_ref()` [#5481](https://github.com/rust-lang/rust-clippy/pull/5481)
* Improve the suggested placeholder in [`option_map_unit_fn`] [#5292](https://github.com/rust-lang/rust-clippy/pull/5292)
* Improve suggestion for [`match_single_binding`] when triggered inside a closure [#5350](https://github.com/rust-lang/rust-clippy/pull/5350)
### ICE Fixes
* Handle the unstable `trivial_bounds` feature [#5296](https://github.com/rust-lang/rust-clippy/pull/5296)
* `shadow_*` lints [#5297](https://github.com/rust-lang/rust-clippy/pull/5297)
### Documentation
* Fix documentation generation for configurable lints [#5353](https://github.com/rust-lang/rust-clippy/pull/5353)
* Update documentation for [`new_ret_no_self`] [#5448](https://github.com/rust-lang/rust-clippy/pull/5448)
* The documentation for [`option_option`] now suggest using a tri-state enum [#5403](https://github.com/rust-lang/rust-clippy/pull/5403)
* Fix bit mask example in [`verbose_bit_mask`] documentation [#5454](https://github.com/rust-lang/rust-clippy/pull/5454)
* [`wildcard_imports`] documentation now mentions that `use ...::prelude::*` is
not linted [#5312](https://github.com/rust-lang/rust-clippy/pull/5312)
## Rust 1.43
Released 2020-04-23
[View all 91 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2020-01-26T16%3A01%3A11Z..2020-03-04T16%3A45%3A37Z+base%3Amaster)
### New lints
* [`imprecise_flops`] [#4897](https://github.com/rust-lang/rust-clippy/pull/4897)
* [`suboptimal_flops`] [#4897](https://github.com/rust-lang/rust-clippy/pull/4897)
* [`wildcard_imports`] [#5029](https://github.com/rust-lang/rust-clippy/pull/5029)
* [`single_component_path_imports`] [#5058](https://github.com/rust-lang/rust-clippy/pull/5058)
* [`match_single_binding`] [#5061](https://github.com/rust-lang/rust-clippy/pull/5061)
* [`let_underscore_lock`] [#5101](https://github.com/rust-lang/rust-clippy/pull/5101)
* [`struct_excessive_bools`] [#5125](https://github.com/rust-lang/rust-clippy/pull/5125)
* [`fn_params_excessive_bools`] [#5125](https://github.com/rust-lang/rust-clippy/pull/5125)
* [`option_env_unwrap`] [#5148](https://github.com/rust-lang/rust-clippy/pull/5148)
* [`lossy_float_literal`] [#5202](https://github.com/rust-lang/rust-clippy/pull/5202)
* [`rest_pat_in_fully_bound_structs`] [#5258](https://github.com/rust-lang/rust-clippy/pull/5258)
### Moves and Deprecations
* Move [`unneeded_field_pattern`] to pedantic group [#5200](https://github.com/rust-lang/rust-clippy/pull/5200)
### Enhancements
* Make [`missing_errors_doc`] lint also trigger on `async` functions
[#5181](https://github.com/rust-lang/rust-clippy/pull/5181)
* Add more constants to [`approx_constant`] [#5193](https://github.com/rust-lang/rust-clippy/pull/5193)
* Extend [`question_mark`] lint [#5266](https://github.com/rust-lang/rust-clippy/pull/5266)
### False Positive Fixes
* [`use_debug`] [#5047](https://github.com/rust-lang/rust-clippy/pull/5047)
* [`unnecessary_unwrap`] [#5132](https://github.com/rust-lang/rust-clippy/pull/5132)
* [`zero_prefixed_literal`] [#5170](https://github.com/rust-lang/rust-clippy/pull/5170)
* [`missing_const_for_fn`] [#5216](https://github.com/rust-lang/rust-clippy/pull/5216)
### Suggestion Improvements
* Improve suggestion when blocks of code are suggested [#5134](https://github.com/rust-lang/rust-clippy/pull/5134)
### ICE Fixes
* `misc_early` lints [#5129](https://github.com/rust-lang/rust-clippy/pull/5129)
* [`missing_errors_doc`] [#5213](https://github.com/rust-lang/rust-clippy/pull/5213)
* Fix ICE when evaluating `usize`s [#5256](https://github.com/rust-lang/rust-clippy/pull/5256)
### Documentation
* Improve documentation of [`iter_nth_zero`]
* Add documentation pages for stable releases [#5171](https://github.com/rust-lang/rust-clippy/pull/5171)
### Others
* Clippy now completely runs on GitHub Actions [#5190](https://github.com/rust-lang/rust-clippy/pull/5190)
## Rust 1.42
Released 2020-03-12
[View all 101 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2019-12-15T01%3A40%3A34Z..2020-01-26T11%3A22%3A13Z+base%3Amaster)
### New lints
* [`filetype_is_file`] [#4543](https://github.com/rust-lang/rust-clippy/pull/4543)
* [`let_underscore_must_use`] [#4823](https://github.com/rust-lang/rust-clippy/pull/4823)
* [`modulo_arithmetic`] [#4867](https://github.com/rust-lang/rust-clippy/pull/4867)
* [`mem_replace_with_default`] [#4881](https://github.com/rust-lang/rust-clippy/pull/4881)
* [`mutable_key_type`] [#4885](https://github.com/rust-lang/rust-clippy/pull/4885)
* [`option_as_ref_deref`] [#4945](https://github.com/rust-lang/rust-clippy/pull/4945)
* [`wildcard_in_or_patterns`] [#4960](https://github.com/rust-lang/rust-clippy/pull/4960)
* [`iter_nth_zero`] [#4966](https://github.com/rust-lang/rust-clippy/pull/4966)
* `invalid_atomic_ordering` [#4999](https://github.com/rust-lang/rust-clippy/pull/4999)
* [`skip_while_next`] [#5067](https://github.com/rust-lang/rust-clippy/pull/5067)
### Moves and Deprecations
* Move [`transmute_float_to_int`] from nursery to complexity group
[#5015](https://github.com/rust-lang/rust-clippy/pull/5015)
* Move [`range_plus_one`] to pedantic group [#5057](https://github.com/rust-lang/rust-clippy/pull/5057)
* Move [`debug_assert_with_mut_call`] to nursery group [#5106](https://github.com/rust-lang/rust-clippy/pull/5106)
* Deprecate `unused_label` [#4930](https://github.com/rust-lang/rust-clippy/pull/4930)
### Enhancements
* Lint vectored IO in [`unused_io_amount`] [#5027](https://github.com/rust-lang/rust-clippy/pull/5027)
* Make [`vec_box`] configurable by adding a size threshold [#5081](https://github.com/rust-lang/rust-clippy/pull/5081)
* Also lint constants in [`cmp_nan`] [#4910](https://github.com/rust-lang/rust-clippy/pull/4910)
* Fix false negative in [`expect_fun_call`] [#4915](https://github.com/rust-lang/rust-clippy/pull/4915)
* Fix false negative in [`redundant_clone`] [#5017](https://github.com/rust-lang/rust-clippy/pull/5017)
### False Positive Fixes
* [`map_clone`] [#4937](https://github.com/rust-lang/rust-clippy/pull/4937)
* [`replace_consts`] [#4977](https://github.com/rust-lang/rust-clippy/pull/4977)
* [`let_and_return`] [#5008](https://github.com/rust-lang/rust-clippy/pull/5008)
* [`eq_op`] [#5079](https://github.com/rust-lang/rust-clippy/pull/5079)
* [`possible_missing_comma`] [#5083](https://github.com/rust-lang/rust-clippy/pull/5083)
* [`debug_assert_with_mut_call`] [#5106](https://github.com/rust-lang/rust-clippy/pull/5106)
* Don't trigger [`let_underscore_must_use`] in external macros
[#5082](https://github.com/rust-lang/rust-clippy/pull/5082)
* Don't trigger [`empty_loop`] in `no_std` crates [#5086](https://github.com/rust-lang/rust-clippy/pull/5086)
### Suggestion Improvements
* `option_map_unwrap_or` [#4634](https://github.com/rust-lang/rust-clippy/pull/4634)
* [`wildcard_enum_match_arm`] [#4934](https://github.com/rust-lang/rust-clippy/pull/4934)
* [`cognitive_complexity`] [#4935](https://github.com/rust-lang/rust-clippy/pull/4935)
* [`decimal_literal_representation`] [#4956](https://github.com/rust-lang/rust-clippy/pull/4956)
* `unknown_clippy_lints` [#4963](https://github.com/rust-lang/rust-clippy/pull/4963)
* [`explicit_into_iter_loop`] [#4978](https://github.com/rust-lang/rust-clippy/pull/4978)
* [`useless_attribute`] [#5022](https://github.com/rust-lang/rust-clippy/pull/5022)
* `if_let_some_result` [#5032](https://github.com/rust-lang/rust-clippy/pull/5032)
### ICE fixes
* [`unsound_collection_transmute`] [#4975](https://github.com/rust-lang/rust-clippy/pull/4975)
### Documentation
* Improve documentation of [`empty_enum`], [`replace_consts`], [`redundant_clone`], and [`iterator_step_by_zero`]
## Rust 1.41
Released 2020-01-30
[View all 74 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2019-10-28T20%3A50%3A24Z..2019-12-12T00%3A53%3A03Z+base%3Amaster)
* New Lints:
* [`exit`] [#4697](https://github.com/rust-lang/rust-clippy/pull/4697)
* [`to_digit_is_some`] [#4801](https://github.com/rust-lang/rust-clippy/pull/4801)
* [`tabs_in_doc_comments`] [#4806](https://github.com/rust-lang/rust-clippy/pull/4806)
* [`large_stack_arrays`] [#4807](https://github.com/rust-lang/rust-clippy/pull/4807)
* [`same_functions_in_if_condition`] [#4814](https://github.com/rust-lang/rust-clippy/pull/4814)
* [`zst_offset`] [#4816](https://github.com/rust-lang/rust-clippy/pull/4816)
* [`as_conversions`] [#4821](https://github.com/rust-lang/rust-clippy/pull/4821)
* [`missing_errors_doc`] [#4884](https://github.com/rust-lang/rust-clippy/pull/4884)
* [`transmute_float_to_int`] [#4889](https://github.com/rust-lang/rust-clippy/pull/4889)
* Remove plugin interface, see
[Inside Rust Blog](https://blog.rust-lang.org/inside-rust/2019/11/04/Clippy-removes-plugin-interface.html) for
details [#4714](https://github.com/rust-lang/rust-clippy/pull/4714)
* Move [`use_self`] to nursery group [#4863](https://github.com/rust-lang/rust-clippy/pull/4863)
* Deprecate `into_iter_on_array` [#4788](https://github.com/rust-lang/rust-clippy/pull/4788)
* Expand [`string_lit_as_bytes`] to also trigger when literal has escapes
[#4808](https://github.com/rust-lang/rust-clippy/pull/4808)
* Fix false positive in `comparison_chain` [#4842](https://github.com/rust-lang/rust-clippy/pull/4842)
* Fix false positive in `while_immutable_condition` [#4730](https://github.com/rust-lang/rust-clippy/pull/4730)
* Fix false positive in `explicit_counter_loop` [#4803](https://github.com/rust-lang/rust-clippy/pull/4803)
* Fix false positive in `must_use_candidate` [#4794](https://github.com/rust-lang/rust-clippy/pull/4794)
* Fix false positive in `print_with_newline` and `write_with_newline`
[#4769](https://github.com/rust-lang/rust-clippy/pull/4769)
* Fix false positive in `derive_hash_xor_eq` [#4766](https://github.com/rust-lang/rust-clippy/pull/4766)
* Fix false positive in `missing_inline_in_public_items` [#4870](https://github.com/rust-lang/rust-clippy/pull/4870)
* Fix false positive in `string_add` [#4880](https://github.com/rust-lang/rust-clippy/pull/4880)
* Fix false positive in `float_arithmetic` [#4851](https://github.com/rust-lang/rust-clippy/pull/4851)
* Fix false positive in `cast_sign_loss` [#4883](https://github.com/rust-lang/rust-clippy/pull/4883)
* Fix false positive in `manual_swap` [#4877](https://github.com/rust-lang/rust-clippy/pull/4877)
* Fix ICEs occurring while checking some block expressions [#4772](https://github.com/rust-lang/rust-clippy/pull/4772)
* Fix ICE in `use_self` [#4776](https://github.com/rust-lang/rust-clippy/pull/4776)
* Fix ICEs related to `const_generics` [#4780](https://github.com/rust-lang/rust-clippy/pull/4780)
* Display help when running `clippy-driver` without arguments, instead of ICEing
[#4810](https://github.com/rust-lang/rust-clippy/pull/4810)
* Clippy has its own ICE message now [#4588](https://github.com/rust-lang/rust-clippy/pull/4588)
* Show deprecated lints in the documentation again [#4757](https://github.com/rust-lang/rust-clippy/pull/4757)
* Improve Documentation by adding positive examples to some lints
[#4832](https://github.com/rust-lang/rust-clippy/pull/4832)
## Rust 1.40
Released 2019-12-19
[View all 76 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2019-09-23T06%3A18%3A04Z..2019-10-28T17%3A34%3A55Z+base%3Amaster)
* New Lints:
* [`unneeded_wildcard_pattern`] [#4537](https://github.com/rust-lang/rust-clippy/pull/4537)
* [`needless_doctest_main`] [#4603](https://github.com/rust-lang/rust-clippy/pull/4603)
* [`suspicious_unary_op_formatting`] [#4615](https://github.com/rust-lang/rust-clippy/pull/4615)
* [`debug_assert_with_mut_call`] [#4680](https://github.com/rust-lang/rust-clippy/pull/4680)
* [`unused_self`] [#4619](https://github.com/rust-lang/rust-clippy/pull/4619)
* [`inefficient_to_string`] [#4683](https://github.com/rust-lang/rust-clippy/pull/4683)
* [`must_use_unit`] [#4560](https://github.com/rust-lang/rust-clippy/pull/4560)
* [`must_use_candidate`] [#4560](https://github.com/rust-lang/rust-clippy/pull/4560)
* [`double_must_use`] [#4560](https://github.com/rust-lang/rust-clippy/pull/4560)
* [`comparison_chain`] [#4569](https://github.com/rust-lang/rust-clippy/pull/4569)
* [`unsound_collection_transmute`] [#4592](https://github.com/rust-lang/rust-clippy/pull/4592)
* [`panic`] [#4657](https://github.com/rust-lang/rust-clippy/pull/4657)
* [`unreachable`] [#4657](https://github.com/rust-lang/rust-clippy/pull/4657)
* [`todo`] [#4657](https://github.com/rust-lang/rust-clippy/pull/4657)
* `option_expect_used` [#4657](https://github.com/rust-lang/rust-clippy/pull/4657)
* `result_expect_used` [#4657](https://github.com/rust-lang/rust-clippy/pull/4657)
* Move `redundant_clone` to perf group [#4509](https://github.com/rust-lang/rust-clippy/pull/4509)
* Move `manual_mul_add` to nursery group [#4736](https://github.com/rust-lang/rust-clippy/pull/4736)
* Expand `unit_cmp` to also work with `assert_eq!`, `debug_assert_eq!`, `assert_ne!` and `debug_assert_ne!` [#4613](https://github.com/rust-lang/rust-clippy/pull/4613)
* Expand `integer_arithmetic` to also detect mutating arithmetic like `+=` [#4585](https://github.com/rust-lang/rust-clippy/pull/4585)
* Fix false positive in `nonminimal_bool` [#4568](https://github.com/rust-lang/rust-clippy/pull/4568)
* Fix false positive in `missing_safety_doc` [#4611](https://github.com/rust-lang/rust-clippy/pull/4611)
* Fix false positive in `cast_sign_loss` [#4614](https://github.com/rust-lang/rust-clippy/pull/4614)
* Fix false positive in `redundant_clone` [#4509](https://github.com/rust-lang/rust-clippy/pull/4509)
* Fix false positive in `try_err` [#4721](https://github.com/rust-lang/rust-clippy/pull/4721)
* Fix false positive in `toplevel_ref_arg` [#4570](https://github.com/rust-lang/rust-clippy/pull/4570)
* Fix false positive in `multiple_inherent_impl` [#4593](https://github.com/rust-lang/rust-clippy/pull/4593)
* Improve more suggestions and tests in preparation for the unstable `cargo fix --clippy` [#4575](https://github.com/rust-lang/rust-clippy/pull/4575)
* Improve suggestion for `zero_ptr` [#4599](https://github.com/rust-lang/rust-clippy/pull/4599)
* Improve suggestion for `explicit_counter_loop` [#4691](https://github.com/rust-lang/rust-clippy/pull/4691)
* Improve suggestion for `mul_add` [#4602](https://github.com/rust-lang/rust-clippy/pull/4602)
* Improve suggestion for `assertions_on_constants` [#4635](https://github.com/rust-lang/rust-clippy/pull/4635)
* Fix ICE in `use_self` [#4671](https://github.com/rust-lang/rust-clippy/pull/4671)
* Fix ICE when encountering const casts [#4590](https://github.com/rust-lang/rust-clippy/pull/4590)
## Rust 1.39
Released 2019-11-07
[View all 100 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2019-08-11T19%3A21%3A38Z..2019-09-22T12%3A07%3A39Z+base%3Amaster)
* New Lints:
* [`uninit_assumed_init`] [#4479](https://github.com/rust-lang/rust-clippy/pull/4479)
* [`flat_map_identity`] [#4231](https://github.com/rust-lang/rust-clippy/pull/4231)
* [`missing_safety_doc`] [#4535](https://github.com/rust-lang/rust-clippy/pull/4535)
* [`mem_replace_with_uninit`] [#4511](https://github.com/rust-lang/rust-clippy/pull/4511)
* [`suspicious_map`] [#4394](https://github.com/rust-lang/rust-clippy/pull/4394)
* `option_and_then_some` [#4386](https://github.com/rust-lang/rust-clippy/pull/4386)
* [`manual_saturating_arithmetic`] [#4498](https://github.com/rust-lang/rust-clippy/pull/4498)
* Deprecate `unused_collect` lint. This is fully covered by rustc's `#[must_use]` on `collect` [#4348](https://github.com/rust-lang/rust-clippy/pull/4348)
* Move `type_repetition_in_bounds` to pedantic group [#4403](https://github.com/rust-lang/rust-clippy/pull/4403)
* Move `cast_lossless` to pedantic group [#4539](https://github.com/rust-lang/rust-clippy/pull/4539)
* `temporary_cstring_as_ptr` now catches more cases [#4425](https://github.com/rust-lang/rust-clippy/pull/4425)
* `use_self` now works in constructors, too [#4525](https://github.com/rust-lang/rust-clippy/pull/4525)
* `cargo_common_metadata` now checks for license files [#4518](https://github.com/rust-lang/rust-clippy/pull/4518)
* `cognitive_complexity` now includes the measured complexity in the warning message [#4469](https://github.com/rust-lang/rust-clippy/pull/4469)
* Fix false positives in `block_in_if_*` lints [#4458](https://github.com/rust-lang/rust-clippy/pull/4458)
* Fix false positive in `cast_lossless` [#4473](https://github.com/rust-lang/rust-clippy/pull/4473)
* Fix false positive in `clone_on_copy` [#4411](https://github.com/rust-lang/rust-clippy/pull/4411)
* Fix false positive in `deref_addrof` [#4487](https://github.com/rust-lang/rust-clippy/pull/4487)
* Fix false positive in `too_many_lines` [#4490](https://github.com/rust-lang/rust-clippy/pull/4490)
* Fix false positive in `new_ret_no_self` [#4365](https://github.com/rust-lang/rust-clippy/pull/4365)
* Fix false positive in `manual_swap` [#4478](https://github.com/rust-lang/rust-clippy/pull/4478)
* Fix false positive in `missing_const_for_fn` [#4450](https://github.com/rust-lang/rust-clippy/pull/4450)
* Fix false positive in `extra_unused_lifetimes` [#4477](https://github.com/rust-lang/rust-clippy/pull/4477)
* Fix false positive in `inherent_to_string` [#4460](https://github.com/rust-lang/rust-clippy/pull/4460)
* Fix false positive in `map_entry` [#4495](https://github.com/rust-lang/rust-clippy/pull/4495)
* Fix false positive in `unused_unit` [#4445](https://github.com/rust-lang/rust-clippy/pull/4445)
* Fix false positive in `redundant_pattern` [#4489](https://github.com/rust-lang/rust-clippy/pull/4489)
* Fix false positive in `wrong_self_convention` [#4369](https://github.com/rust-lang/rust-clippy/pull/4369)
* Improve various suggestions and tests in preparation for the unstable `cargo fix --clippy` [#4558](https://github.com/rust-lang/rust-clippy/pull/4558)
* Improve suggestions for `redundant_pattern_matching` [#4352](https://github.com/rust-lang/rust-clippy/pull/4352)
* Improve suggestions for `explicit_write` [#4544](https://github.com/rust-lang/rust-clippy/pull/4544)
* Improve suggestion for `or_fun_call` [#4522](https://github.com/rust-lang/rust-clippy/pull/4522)
* Improve suggestion for `match_as_ref` [#4446](https://github.com/rust-lang/rust-clippy/pull/4446)
* Improve suggestion for `unnecessary_fold_span` [#4382](https://github.com/rust-lang/rust-clippy/pull/4382)
* Add suggestions for `unseparated_literal_suffix` [#4401](https://github.com/rust-lang/rust-clippy/pull/4401)
* Add suggestions for `char_lit_as_u8` [#4418](https://github.com/rust-lang/rust-clippy/pull/4418)
## Rust 1.38
Released 2019-09-26
[View all 76 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2019-06-30T13%3A40%3A26Z..2019-08-11T09%3A47%3A27Z+base%3Amaster)
* New Lints:
* [`main_recursion`] [#4203](https://github.com/rust-lang/rust-clippy/pull/4203)
* [`inherent_to_string`] [#4259](https://github.com/rust-lang/rust-clippy/pull/4259)
* [`inherent_to_string_shadow_display`] [#4259](https://github.com/rust-lang/rust-clippy/pull/4259)
* [`type_repetition_in_bounds`] [#3766](https://github.com/rust-lang/rust-clippy/pull/3766)
* [`try_err`] [#4222](https://github.com/rust-lang/rust-clippy/pull/4222)
* Move `{unnecessary,panicking}_unwrap` out of nursery [#4307](https://github.com/rust-lang/rust-clippy/pull/4307)
* Extend the `use_self` lint to suggest uses of `Self::Variant` [#4308](https://github.com/rust-lang/rust-clippy/pull/4308)
* Improve suggestion for needless return [#4262](https://github.com/rust-lang/rust-clippy/pull/4262)
* Add auto-fixable suggestion for `let_unit` [#4337](https://github.com/rust-lang/rust-clippy/pull/4337)
* Fix false positive in `pub_enum_variant_names` and `enum_variant_names` [#4345](https://github.com/rust-lang/rust-clippy/pull/4345)
* Fix false positive in `cast_ptr_alignment` [#4257](https://github.com/rust-lang/rust-clippy/pull/4257)
* Fix false positive in `string_lit_as_bytes` [#4233](https://github.com/rust-lang/rust-clippy/pull/4233)
* Fix false positive in `needless_lifetimes` [#4266](https://github.com/rust-lang/rust-clippy/pull/4266)
* Fix false positive in `float_cmp` [#4275](https://github.com/rust-lang/rust-clippy/pull/4275)
* Fix false positives in `needless_return` [#4274](https://github.com/rust-lang/rust-clippy/pull/4274)
* Fix false negative in `match_same_arms` [#4246](https://github.com/rust-lang/rust-clippy/pull/4246)
* Fix incorrect suggestion for `needless_bool` [#4335](https://github.com/rust-lang/rust-clippy/pull/4335)
* Improve suggestion for `cast_ptr_alignment` [#4257](https://github.com/rust-lang/rust-clippy/pull/4257)
* Improve suggestion for `single_char_literal` [#4361](https://github.com/rust-lang/rust-clippy/pull/4361)
* Improve suggestion for `len_zero` [#4314](https://github.com/rust-lang/rust-clippy/pull/4314)
* Fix ICE in `implicit_hasher` [#4268](https://github.com/rust-lang/rust-clippy/pull/4268)
* Fix allow bug in `trivially_copy_pass_by_ref` [#4250](https://github.com/rust-lang/rust-clippy/pull/4250)
## Rust 1.37
Released 2019-08-15
[View all 72 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2019-05-19T08%3A11%3A23Z..2019-06-25T23%3A22%3A22Z+base%3Amaster)
* New Lints:
* [`checked_conversions`] [#4088](https://github.com/rust-lang/rust-clippy/pull/4088)
* [`get_last_with_len`] [#3832](https://github.com/rust-lang/rust-clippy/pull/3832)
* [`integer_division`] [#4195](https://github.com/rust-lang/rust-clippy/pull/4195)
* Renamed Lint: `const_static_lifetime` is now called [`redundant_static_lifetimes`].
The lint now covers statics in addition to consts [#4162](https://github.com/rust-lang/rust-clippy/pull/4162)
* [`match_same_arms`] now warns for all identical arms, instead of only the first one [#4102](https://github.com/rust-lang/rust-clippy/pull/4102)
* [`needless_return`] now works with void functions [#4220](https://github.com/rust-lang/rust-clippy/pull/4220)
* Fix false positive in [`redundant_closure`] [#4190](https://github.com/rust-lang/rust-clippy/pull/4190)
* Fix false positive in [`useless_attribute`] [#4107](https://github.com/rust-lang/rust-clippy/pull/4107)
* Fix incorrect suggestion for [`float_cmp`] [#4214](https://github.com/rust-lang/rust-clippy/pull/4214)
* Add suggestions for [`print_with_newline`] and [`write_with_newline`] [#4136](https://github.com/rust-lang/rust-clippy/pull/4136)
* Improve suggestions for `option_map_unwrap_or_else` and `result_map_unwrap_or_else` [#4164](https://github.com/rust-lang/rust-clippy/pull/4164)
* Improve suggestions for [`non_ascii_literal`] [#4119](https://github.com/rust-lang/rust-clippy/pull/4119)
* Improve diagnostics for [`let_and_return`] [#4137](https://github.com/rust-lang/rust-clippy/pull/4137)
* Improve diagnostics for [`trivially_copy_pass_by_ref`] [#4071](https://github.com/rust-lang/rust-clippy/pull/4071)
* Add macro check for [`unreadable_literal`] [#4099](https://github.com/rust-lang/rust-clippy/pull/4099)
## Rust 1.36
Released 2019-07-04
[View all 81 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2019-04-10T09%3A41%3A56Z..2019-05-18T00%3A29%3A40Z+base%3Amaster)
* New lints: [`find_map`], [`filter_map_next`] [#4039](https://github.com/rust-lang/rust-clippy/pull/4039)
* New lint: [`path_buf_push_overwrite`] [#3954](https://github.com/rust-lang/rust-clippy/pull/3954)
* Move `path_buf_push_overwrite` to the nursery [#4013](https://github.com/rust-lang/rust-clippy/pull/4013)
* Split [`redundant_closure`] into [`redundant_closure`] and [`redundant_closure_for_method_calls`] [#4110](https://github.com/rust-lang/rust-clippy/pull/4101)
* Allow allowing of [`toplevel_ref_arg`] lint [#4007](https://github.com/rust-lang/rust-clippy/pull/4007)
* Fix false negative in [`or_fun_call`] pertaining to nested constructors [#4084](https://github.com/rust-lang/rust-clippy/pull/4084)
* Fix false positive in [`or_fun_call`] pertaining to enum variant constructors [#4018](https://github.com/rust-lang/rust-clippy/pull/4018)
* Fix false positive in [`useless_let_if_seq`] pertaining to interior mutability [#4035](https://github.com/rust-lang/rust-clippy/pull/4035)
* Fix false positive in [`redundant_closure`] pertaining to non-function types [#4008](https://github.com/rust-lang/rust-clippy/pull/4008)
* Fix false positive in [`let_and_return`] pertaining to attributes on `let`s [#4024](https://github.com/rust-lang/rust-clippy/pull/4024)
* Fix false positive in [`module_name_repetitions`] lint pertaining to attributes [#4006](https://github.com/rust-lang/rust-clippy/pull/4006)
* Fix false positive on [`assertions_on_constants`] pertaining to `debug_assert!` [#3989](https://github.com/rust-lang/rust-clippy/pull/3989)
* Improve suggestion in [`map_clone`] to suggest `.copied()` where applicable [#3970](https://github.com/rust-lang/rust-clippy/pull/3970) [#4043](https://github.com/rust-lang/rust-clippy/pull/4043)
* Improve suggestion for [`search_is_some`] [#4049](https://github.com/rust-lang/rust-clippy/pull/4049)
* Improve suggestion applicability for [`naive_bytecount`] [#3984](https://github.com/rust-lang/rust-clippy/pull/3984)
* Improve suggestion applicability for [`while_let_loop`] [#3975](https://github.com/rust-lang/rust-clippy/pull/3975)
* Improve diagnostics for [`too_many_arguments`] [#4053](https://github.com/rust-lang/rust-clippy/pull/4053)
* Improve diagnostics for [`cast_lossless`] [#4021](https://github.com/rust-lang/rust-clippy/pull/4021)
* Deal with macro checks in desugarings better [#4082](https://github.com/rust-lang/rust-clippy/pull/4082)
* Add macro check for [`unnecessary_cast`] [#4026](https://github.com/rust-lang/rust-clippy/pull/4026)
* Remove [`approx_constant`]'s documentation's "Known problems" section. [#4027](https://github.com/rust-lang/rust-clippy/pull/4027)
* Fix ICE in [`suspicious_else_formatting`] [#3960](https://github.com/rust-lang/rust-clippy/pull/3960)
* Fix ICE in [`decimal_literal_representation`] [#3931](https://github.com/rust-lang/rust-clippy/pull/3931)
## Rust 1.35
Released 2019-05-20
[1fac380..37f5c1e](https://github.com/rust-lang/rust-clippy/compare/1fac380...37f5c1e)
* New lint: `drop_bounds` to detect `T: Drop` bounds
* Split [`redundant_closure`] into [`redundant_closure`] and [`redundant_closure_for_method_calls`] [#4110](https://github.com/rust-lang/rust-clippy/pull/4101)
* Rename `cyclomatic_complexity` to [`cognitive_complexity`], start work on making lint more practical for Rust code
* Move [`get_unwrap`] to the restriction category
* Improve suggestions for [`iter_cloned_collect`]
* Improve suggestions for [`cast_lossless`] to suggest suffixed literals
* Fix false positives in [`print_with_newline`] and [`write_with_newline`] pertaining to raw strings
* Fix false positive in [`needless_range_loop`] pertaining to structs without a `.iter()`
* Fix false positive in [`bool_comparison`] pertaining to non-bool types
* Fix false positive in [`redundant_closure`] pertaining to differences in borrows
* Fix false positive in `option_map_unwrap_or` on non-copy types
* Fix false positives in [`missing_const_for_fn`] pertaining to macros and trait method impls
* Fix false positive in [`needless_pass_by_value`] pertaining to procedural macros
* Fix false positive in [`needless_continue`] pertaining to loop labels
* Fix false positive for [`boxed_local`] pertaining to arguments moved into closures
* Fix false positive for [`use_self`] in nested functions
* Fix suggestion for [`expect_fun_call`] (https://github.com/rust-lang/rust-clippy/pull/3846)
* Fix suggestion for [`explicit_counter_loop`] to deal with parenthesizing range variables
* Fix suggestion for [`single_char_pattern`] to correctly escape single quotes
* Avoid triggering [`redundant_closure`] in macros
* ICE fixes: [#3805](https://github.com/rust-lang/rust-clippy/pull/3805), [#3772](https://github.com/rust-lang/rust-clippy/pull/3772), [#3741](https://github.com/rust-lang/rust-clippy/pull/3741)
## Rust 1.34
Released 2019-04-10
[View all 61 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2019-01-17T17%3A45%3A39Z..2019-02-19T08%3A24%3A05Z+base%3Amaster)
* New lint: [`assertions_on_constants`] to detect for example `assert!(true)`
* New lint: [`dbg_macro`] to detect uses of the `dbg!` macro
* New lint: [`missing_const_for_fn`] that can suggest functions to be made `const`
* New lint: [`too_many_lines`] to detect functions with excessive LOC. It can be
configured using the `too-many-lines-threshold` configuration.
* New lint: [`wildcard_enum_match_arm`] to check for wildcard enum matches using `_`
* Expand `redundant_closure` to also work for methods (not only functions)
* Fix ICEs in `vec_box`, `needless_pass_by_value` and `implicit_hasher`
* Fix false positive in `cast_sign_loss`
* Fix false positive in `integer_arithmetic`
* Fix false positive in `unit_arg`
* Fix false positives in `implicit_return`
* Add suggestion to `explicit_write`
* Improve suggestions for `question_mark` lint
* Fix incorrect suggestion for `cast_lossless`
* Fix incorrect suggestion for `expect_fun_call`
* Fix incorrect suggestion for `needless_bool`
* Fix incorrect suggestion for `needless_range_loop`
* Fix incorrect suggestion for `use_self`
* Fix incorrect suggestion for `while_let_on_iterator`
* Clippy is now slightly easier to invoke in non-cargo contexts. See
[#3665][pull3665] for more details.
* We now have [improved documentation][adding_lints] on how to add new lints
## Rust 1.33
Released 2019-02-26
[View all 120 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2018-11-28T06%3A19%3A50Z..2019-01-15T09%3A27%3A02Z+base%3Amaster)
* New lints: [`implicit_return`], [`vec_box`], [`cast_ref_to_mut`]
* The `rust-clippy` repository is now part of the `rust-lang` org.
* Rename `stutter` to `module_name_repetitions`
* Merge `new_without_default_derive` into `new_without_default` lint
* Move `large_digit_groups` from `style` group to `pedantic`
* Expand `bool_comparison` to check for `<`, `<=`, `>`, `>=`, and `!=`
comparisons against booleans
* Expand `no_effect` to detect writes to constants such as `A_CONST.field = 2`
* Expand `redundant_clone` to work on struct fields
* Expand `suspicious_else_formatting` to detect `if .. {..} {..}`
* Expand `use_self` to work on tuple structs and also in local macros
* Fix ICE in `result_map_unit_fn` and `option_map_unit_fn`
* Fix false positives in `implicit_return`
* Fix false positives in `use_self`
* Fix false negative in `clone_on_copy`
* Fix false positive in `doc_markdown`
* Fix false positive in `empty_loop`
* Fix false positive in `if_same_then_else`
* Fix false positive in `infinite_iter`
* Fix false positive in `question_mark`
* Fix false positive in `useless_asref`
* Fix false positive in `wildcard_dependencies`
* Fix false positive in `write_with_newline`
* Add suggestion to `explicit_write`
* Improve suggestions for `question_mark` lint
* Fix incorrect suggestion for `get_unwrap`
## Rust 1.32
Released 2019-01-17
[View all 71 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2018-10-24T05%3A02%3A21Z..2018-11-27T17%3A29%3A34Z+base%3Amaster)
* New lints: [`slow_vector_initialization`], `mem_discriminant_non_enum`,
[`redundant_clone`], [`wildcard_dependencies`],
[`into_iter_on_ref`], `into_iter_on_array`, [`deprecated_cfg_attr`],
[`cargo_common_metadata`]
* Add support for `u128` and `i128` to integer related lints
* Add float support to `mistyped_literal_suffixes`
* Fix false positives in `use_self`
* Fix false positives in `missing_comma`
* Fix false positives in `new_ret_no_self`
* Fix false positives in `possible_missing_comma`
* Fix false positive in `integer_arithmetic` in constant items
* Fix false positive in `needless_borrow`
* Fix false positive in `out_of_bounds_indexing`
* Fix false positive in `new_without_default_derive`
* Fix false positive in `string_lit_as_bytes`
* Fix false negative in `out_of_bounds_indexing`
* Fix false negative in `use_self`. It will now also check existential types
* Fix incorrect suggestion for `redundant_closure_call`
* Fix various suggestions that contained expanded macros
* Fix `bool_comparison` triggering 3 times on on on the same code
* Expand `trivially_copy_pass_by_ref` to work on trait methods
* Improve suggestion for `needless_range_loop`
* Move `needless_pass_by_value` from `pedantic` group to `style`
## Rust 1.31
Released 2018-12-06
[125907ad..2e26fdc2](https://github.com/rust-lang/rust-clippy/compare/125907ad..2e26fdc2)
* Clippy has been relicensed under a dual MIT / Apache license.
See [#3093](https://github.com/rust-lang/rust-clippy/issues/3093) for more
information.
* With Rust 1.31, Clippy is no longer available via crates.io. The recommended
installation method is via `rustup component add clippy`.
* New lints: [`redundant_pattern_matching`], [`unnecessary_filter_map`],
[`unused_unit`], [`map_flatten`], [`mem_replace_option_with_none`]
* Fix ICE in `if_let_redundant_pattern_matching`
* Fix ICE in `needless_pass_by_value` when encountering a generic function
argument with a lifetime parameter
* Fix ICE in `needless_range_loop`
* Fix ICE in `single_char_pattern` when encountering a constant value
* Fix false positive in `assign_op_pattern`
* Fix false positive in `boxed_local` on trait implementations
* Fix false positive in `cmp_owned`
* Fix false positive in `collapsible_if` when conditionals have comments
* Fix false positive in `double_parens`
* Fix false positive in `excessive_precision`
* Fix false positive in `explicit_counter_loop`
* Fix false positive in `fn_to_numeric_cast_with_truncation`
* Fix false positive in `map_clone`
* Fix false positive in `new_ret_no_self`
* Fix false positive in `new_without_default` when `new` is unsafe
* Fix false positive in `type_complexity` when using extern types
* Fix false positive in `useless_format`
* Fix false positive in `wrong_self_convention`
* Fix incorrect suggestion for `excessive_precision`
* Fix incorrect suggestion for `expect_fun_call`
* Fix incorrect suggestion for `get_unwrap`
* Fix incorrect suggestion for `useless_format`
* `fn_to_numeric_cast_with_truncation` lint can be disabled again
* Improve suggestions for `manual_memcpy`
* Improve help message for `needless_lifetimes`
## Rust 1.30
Released 2018-10-25
[View all 88 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2018-08-02T16%3A54%3A12Z..2018-09-17T09%3A44%3A06Z+base%3Amaster)
* Deprecate `assign_ops` lint
* New lints: [`mistyped_literal_suffixes`], [`ptr_offset_with_cast`],
[`needless_collect`], [`copy_iterator`]
* `cargo clippy -V` now includes the Clippy commit hash of the Rust
Clippy component
* Fix ICE in `implicit_hasher`
* Fix ICE when encountering `println!("{}" a);`
* Fix ICE when encountering a macro call in match statements
* Fix false positive in `default_trait_access`
* Fix false positive in `trivially_copy_pass_by_ref`
* Fix false positive in `similar_names`
* Fix false positive in `redundant_field_name`
* Fix false positive in `expect_fun_call`
* Fix false negative in `identity_conversion`
* Fix false negative in `explicit_counter_loop`
* Fix `range_plus_one` suggestion and false negative
* `print_with_newline` / `write_with_newline`: don't warn about string with several `\n`s in them
* Fix `useless_attribute` to also whitelist `unused_extern_crates`
* Fix incorrect suggestion for `single_char_pattern`
* Improve suggestion for `identity_conversion` lint
* Move `explicit_iter_loop` and `explicit_into_iter_loop` from `style` group to `pedantic`
* Move `range_plus_one` and `range_minus_one` from `nursery` group to `complexity`
* Move `shadow_unrelated` from `restriction` group to `pedantic`
* Move `indexing_slicing` from `pedantic` group to `restriction`
## Rust 1.29
Released 2018-09-13
[v0.0.212...14207503](https://github.com/rust-lang/rust-clippy/compare/v0.0.212...14207503)
* :tada: :tada: **Rust 1.29 is the first stable Rust that includes a bundled Clippy** :tada:
:tada:
You can now run `rustup component add clippy-preview` and then `cargo
clippy` to run Clippy. This should put an end to the continuous nightly
upgrades for Clippy users.
* Clippy now follows the Rust versioning scheme instead of its own
* Fix ICE when encountering a `while let (..) = x.iter()` construct
* Fix false positives in `use_self`
* Fix false positive in `trivially_copy_pass_by_ref`
* Fix false positive in `useless_attribute` lint
* Fix false positive in `print_literal`
* Fix `use_self` regressions
* Improve lint message for `neg_cmp_op_on_partial_ord`
* Improve suggestion highlight for `single_char_pattern`
* Improve suggestions for various print/write macro lints
* Improve website header
## 0.0.212 (2018-07-10)
* Rustup to *rustc 1.29.0-nightly (e06c87544 2018-07-06)*
## 0.0.211
* Rustup to *rustc 1.28.0-nightly (e3bf634e0 2018-06-28)*
## 0.0.210
* Rustup to *rustc 1.28.0-nightly (01cc982e9 2018-06-24)*
## 0.0.209
* Rustup to *rustc 1.28.0-nightly (523097979 2018-06-18)*
## 0.0.208
* Rustup to *rustc 1.28.0-nightly (86a8f1a63 2018-06-17)*
## 0.0.207
* Rustup to *rustc 1.28.0-nightly (2a0062974 2018-06-09)*
## 0.0.206
* Rustup to *rustc 1.28.0-nightly (5bf68db6e 2018-05-28)*
## 0.0.205
* Rustup to *rustc 1.28.0-nightly (990d8aa74 2018-05-25)*
* Rename `unused_lifetimes` to `extra_unused_lifetimes` because of naming conflict with new rustc lint
## 0.0.204
* Rustup to *rustc 1.28.0-nightly (71e87be38 2018-05-22)*
## 0.0.203
* Rustup to *rustc 1.28.0-nightly (a3085756e 2018-05-19)*
* Clippy attributes are now of the form `clippy::cyclomatic_complexity` instead of `clippy(cyclomatic_complexity)`
## 0.0.202
* Rustup to *rustc 1.28.0-nightly (952f344cd 2018-05-18)*
## 0.0.201
* Rustup to *rustc 1.27.0-nightly (2f2a11dfc 2018-05-16)*
## 0.0.200
* Rustup to *rustc 1.27.0-nightly (9fae15374 2018-05-13)*
## 0.0.199
* Rustup to *rustc 1.27.0-nightly (ff2ac35db 2018-05-12)*
## 0.0.198
* Rustup to *rustc 1.27.0-nightly (acd3871ba 2018-05-10)*
## 0.0.197
* Rustup to *rustc 1.27.0-nightly (428ea5f6b 2018-05-06)*
## 0.0.196
* Rustup to *rustc 1.27.0-nightly (e82261dfb 2018-05-03)*
## 0.0.195
* Rustup to *rustc 1.27.0-nightly (ac3c2288f 2018-04-18)*
## 0.0.194
* Rustup to *rustc 1.27.0-nightly (bd40cbbe1 2018-04-14)*
* New lints: [`cast_ptr_alignment`], [`transmute_ptr_to_ptr`], [`write_literal`], [`write_with_newline`], [`writeln_empty_string`]
## 0.0.193
* Rustup to *rustc 1.27.0-nightly (eeea94c11 2018-04-06)*
## 0.0.192
* Rustup to *rustc 1.27.0-nightly (fb44b4c0e 2018-04-04)*
* New lint: [`print_literal`]
## 0.0.191
* Rustup to *rustc 1.26.0-nightly (ae544ee1c 2018-03-29)*
* Lint audit; categorize lints as style, correctness, complexity, pedantic, nursery, restriction.
## 0.0.190
* Fix a bunch of intermittent cargo bugs
## 0.0.189
* Rustup to *rustc 1.26.0-nightly (5508b2714 2018-03-18)*
## 0.0.188
* Rustup to *rustc 1.26.0-nightly (392645394 2018-03-15)*
* New lint: [`while_immutable_condition`]
## 0.0.187
* Rustup to *rustc 1.26.0-nightly (322d7f7b9 2018-02-25)*
* New lints: [`redundant_field_names`], [`suspicious_arithmetic_impl`], [`suspicious_op_assign_impl`]
## 0.0.186
* Rustup to *rustc 1.25.0-nightly (0c6091fbd 2018-02-04)*
* Various false positive fixes
## 0.0.185
* Rustup to *rustc 1.25.0-nightly (56733bc9f 2018-02-01)*
* New lint: [`question_mark`]
## 0.0.184
* Rustup to *rustc 1.25.0-nightly (90eb44a58 2018-01-29)*
* New lints: [`double_comparisons`], [`empty_line_after_outer_attr`]
## 0.0.183
* Rustup to *rustc 1.25.0-nightly (21882aad7 2018-01-28)*
* New lint: [`misaligned_transmute`]
## 0.0.182
* Rustup to *rustc 1.25.0-nightly (a0dcecff9 2018-01-24)*
* New lint: [`decimal_literal_representation`]
## 0.0.181
* Rustup to *rustc 1.25.0-nightly (97520ccb1 2018-01-21)*
* New lints: [`else_if_without_else`], [`option_option`], [`unit_arg`], [`unnecessary_fold`]
* Removed `unit_expr`
* Various false positive fixes for [`needless_pass_by_value`]
## 0.0.180
* Rustup to *rustc 1.25.0-nightly (3f92e8d89 2018-01-14)*
## 0.0.179
* Rustup to *rustc 1.25.0-nightly (61452e506 2018-01-09)*
## 0.0.178
* Rustup to *rustc 1.25.0-nightly (ee220daca 2018-01-07)*
## 0.0.177
* Rustup to *rustc 1.24.0-nightly (250b49205 2017-12-21)*
* New lint: [`match_as_ref`]
## 0.0.176
* Rustup to *rustc 1.24.0-nightly (0077d128d 2017-12-14)*
## 0.0.175
* Rustup to *rustc 1.24.0-nightly (bb42071f6 2017-12-01)*
## 0.0.174
* Rustup to *rustc 1.23.0-nightly (63739ab7b 2017-11-21)*
## 0.0.173
* Rustup to *rustc 1.23.0-nightly (33374fa9d 2017-11-20)*
## 0.0.172
* Rustup to *rustc 1.23.0-nightly (d0f8e2913 2017-11-16)*
## 0.0.171
* Rustup to *rustc 1.23.0-nightly (ff0f5de3b 2017-11-14)*
## 0.0.170
* Rustup to *rustc 1.23.0-nightly (d6b06c63a 2017-11-09)*
## 0.0.169
* Rustup to *rustc 1.23.0-nightly (3b82e4c74 2017-11-05)*
* New lints: [`just_underscores_and_digits`], `result_map_unwrap_or_else`, [`transmute_bytes_to_str`]
## 0.0.168
* Rustup to *rustc 1.23.0-nightly (f0fe716db 2017-10-30)*
## 0.0.167
* Rustup to *rustc 1.23.0-nightly (90ef3372e 2017-10-29)*
* New lints: `const_static_lifetime`, [`erasing_op`], [`fallible_impl_from`], [`println_empty_string`], [`useless_asref`]
## 0.0.166
* Rustup to *rustc 1.22.0-nightly (b7960878b 2017-10-18)*
* New lints: [`explicit_write`], `identity_conversion`, [`implicit_hasher`], `invalid_ref`, [`option_map_or_none`],
[`range_minus_one`], [`range_plus_one`], [`transmute_int_to_bool`], [`transmute_int_to_char`],
[`transmute_int_to_float`]
## 0.0.165
* Rust upgrade to rustc 1.22.0-nightly (0e6f4cf51 2017-09-27)
* New lint: [`mut_range_bound`]
## 0.0.164
* Update to *rustc 1.22.0-nightly (6c476ce46 2017-09-25)*
* New lint: [`int_plus_one`]
## 0.0.163
* Update to *rustc 1.22.0-nightly (14039a42a 2017-09-22)*
## 0.0.162
* Update to *rustc 1.22.0-nightly (0701b37d9 2017-09-18)*
* New lint: [`chars_last_cmp`]
* Improved suggestions for [`needless_borrow`], [`ptr_arg`],
## 0.0.161
* Update to *rustc 1.22.0-nightly (539f2083d 2017-09-13)*
## 0.0.160
* Update to *rustc 1.22.0-nightly (dd08c3070 2017-09-12)*
## 0.0.159
* Update to *rustc 1.22.0-nightly (eba374fb2 2017-09-11)*
* New lint: [`clone_on_ref_ptr`]
## 0.0.158
* New lint: [`manual_memcpy`]
* [`cast_lossless`] no longer has redundant parentheses in its suggestions
* Update to *rustc 1.22.0-nightly (dead08cb3 2017-09-08)*
## 0.0.157 - 2017-09-04
* Update to *rustc 1.22.0-nightly (981ce7d8d 2017-09-03)*
* New lint: `unit_expr`
## 0.0.156 - 2017-09-03
* Update to *rustc 1.22.0-nightly (744dd6c1d 2017-09-02)*
## 0.0.155
* Update to *rustc 1.21.0-nightly (c11f689d2 2017-08-29)*
* New lint: [`infinite_iter`], [`maybe_infinite_iter`], [`cast_lossless`]
## 0.0.154
* Update to *rustc 1.21.0-nightly (2c0558f63 2017-08-24)*
* Fix [`use_self`] triggering inside derives
* Add support for linting an entire workspace with `cargo clippy --all`
* New lint: [`naive_bytecount`]
## 0.0.153
* Update to *rustc 1.21.0-nightly (8c303ed87 2017-08-20)*
* New lint: [`use_self`]
## 0.0.152
* Update to *rustc 1.21.0-nightly (df511d554 2017-08-14)*
## 0.0.151
* Update to *rustc 1.21.0-nightly (13d94d5fa 2017-08-10)*
## 0.0.150
* Update to *rustc 1.21.0-nightly (215e0b10e 2017-08-08)*
## 0.0.148
* Update to *rustc 1.21.0-nightly (37c7d0ebb 2017-07-31)*
* New lints: [`unreadable_literal`], [`inconsistent_digit_grouping`], [`large_digit_groups`]
## 0.0.147
* Update to *rustc 1.21.0-nightly (aac223f4f 2017-07-30)*
## 0.0.146
* Update to *rustc 1.21.0-nightly (52a330969 2017-07-27)*
* Fixes false positives in `inline_always`
* Fixes false negatives in `panic_params`
## 0.0.145
* Update to *rustc 1.20.0-nightly (afe145d22 2017-07-23)*
## 0.0.144
* Update to *rustc 1.20.0-nightly (086eaa78e 2017-07-15)*
## 0.0.143
* Update to *rustc 1.20.0-nightly (d84693b93 2017-07-09)*
* Fix `cargo clippy` crashing on `dylib` projects
* Fix false positives around `nested_while_let` and `never_loop`
## 0.0.142
* Update to *rustc 1.20.0-nightly (067971139 2017-07-02)*
## 0.0.141
* Rewrite of the `doc_markdown` lint.
* Deprecated [`range_step_by_zero`]
* New lint: [`iterator_step_by_zero`]
* New lint: [`needless_borrowed_reference`]
* Update to *rustc 1.20.0-nightly (69c65d296 2017-06-28)*
## 0.0.140 - 2017-06-16
* Update to *rustc 1.19.0-nightly (258ae6dd9 2017-06-15)*
## 0.0.139 — 2017-06-10
* Update to *rustc 1.19.0-nightly (4bf5c99af 2017-06-10)*
* Fix bugs with for loop desugaring
* Check for [`AsRef`]/[`AsMut`] arguments in [`wrong_self_convention`]
## 0.0.138 — 2017-06-05
* Update to *rustc 1.19.0-nightly (0418fa9d3 2017-06-04)*
## 0.0.137 — 2017-06-05
* Update to *rustc 1.19.0-nightly (6684d176c 2017-06-03)*
## 0.0.136 — 2017—05—26
* Update to *rustc 1.19.0-nightly (557967766 2017-05-26)*
## 0.0.135 — 2017—05—24
* Update to *rustc 1.19.0-nightly (5b13bff52 2017-05-23)*
## 0.0.134 — 2017—05—19
* Update to *rustc 1.19.0-nightly (0ed1ec9f9 2017-05-18)*
## 0.0.133 — 2017—05—14
* Update to *rustc 1.19.0-nightly (826d8f385 2017-05-13)*
## 0.0.132 — 2017—05—05
* Fix various bugs and some ices
## 0.0.131 — 2017—05—04
* Update to *rustc 1.19.0-nightly (2d4ed8e0c 2017-05-03)*
## 0.0.130 — 2017—05—03
* Update to *rustc 1.19.0-nightly (6a5fc9eec 2017-05-02)*
## 0.0.129 — 2017-05-01
* Update to *rustc 1.19.0-nightly (06fb4d256 2017-04-30)*
## 0.0.128 — 2017-04-28
* Update to *rustc 1.18.0-nightly (94e884b63 2017-04-27)*
## 0.0.127 — 2017-04-27
* Update to *rustc 1.18.0-nightly (036983201 2017-04-26)*
* New lint: [`needless_continue`]
## 0.0.126 — 2017-04-24
* Update to *rustc 1.18.0-nightly (2bd4b5c6d 2017-04-23)*
## 0.0.125 — 2017-04-19
* Update to *rustc 1.18.0-nightly (9f2abadca 2017-04-18)*
## 0.0.124 — 2017-04-16
* Update to *rustc 1.18.0-nightly (d5cf1cb64 2017-04-15)*
## 0.0.123 — 2017-04-07
* Fix various false positives
## 0.0.122 — 2017-04-07
* Rustup to *rustc 1.18.0-nightly (91ae22a01 2017-04-05)*
* New lint: [`op_ref`]
## 0.0.121 — 2017-03-21
* Rustup to *rustc 1.17.0-nightly (134c4a0f0 2017-03-20)*
## 0.0.120 — 2017-03-17
* Rustup to *rustc 1.17.0-nightly (0aeb9c129 2017-03-15)*
## 0.0.119 — 2017-03-13
* Rustup to *rustc 1.17.0-nightly (824c9ebbd 2017-03-12)*
## 0.0.118 — 2017-03-05
* Rustup to *rustc 1.17.0-nightly (b1e31766d 2017-03-03)*
## 0.0.117 — 2017-03-01
* Rustup to *rustc 1.17.0-nightly (be760566c 2017-02-28)*
## 0.0.116 — 2017-02-28
* Fix `cargo clippy` on 64 bit windows systems
## 0.0.115 — 2017-02-27
* Rustup to *rustc 1.17.0-nightly (60a0edc6c 2017-02-26)*
* New lints: [`zero_ptr`], [`never_loop`], [`mut_from_ref`]
## 0.0.114 — 2017-02-08
* Rustup to *rustc 1.17.0-nightly (c49d10207 2017-02-07)*
* Tests are now ui tests (testing the exact output of rustc)
## 0.0.113 — 2017-02-04
* Rustup to *rustc 1.16.0-nightly (eedaa94e3 2017-02-02)*
* New lint: [`large_enum_variant`]
* `explicit_into_iter_loop` provides suggestions
## 0.0.112 — 2017-01-27
* Rustup to *rustc 1.16.0-nightly (df8debf6d 2017-01-25)*
## 0.0.111 — 2017-01-21
* Rustup to *rustc 1.16.0-nightly (a52da95ce 2017-01-20)*
## 0.0.110 — 2017-01-20
* Add badges and categories to `Cargo.toml`
## 0.0.109 — 2017-01-19
* Update to *rustc 1.16.0-nightly (c07a6ae77 2017-01-17)*
## 0.0.108 — 2017-01-12
* Update to *rustc 1.16.0-nightly (2782e8f8f 2017-01-12)*
## 0.0.107 — 2017-01-11
* Update regex dependency
* Fix FP when matching `&&mut` by `&ref`
* Reintroduce `for (_, x) in &mut hash_map` -> `for x in hash_map.values_mut()`
* New lints: [`unused_io_amount`], [`forget_ref`], [`short_circuit_statement`]
## 0.0.106 — 2017-01-04
* Fix FP introduced by rustup in [`wrong_self_convention`]
## 0.0.105 — 2017-01-04
* Update to *rustc 1.16.0-nightly (468227129 2017-01-03)*
* New lints: [`deref_addrof`], [`double_parens`], [`pub_enum_variant_names`]
* Fix suggestion in [`new_without_default`]
* FP fix in [`absurd_extreme_comparisons`]
## 0.0.104 — 2016-12-15
* Update to *rustc 1.15.0-nightly (8f02c429a 2016-12-15)*
## 0.0.103 — 2016-11-25
* Update to *rustc 1.15.0-nightly (d5814b03e 2016-11-23)*
## 0.0.102 — 2016-11-24
* Update to *rustc 1.15.0-nightly (3bf2be9ce 2016-11-22)*
## 0.0.101 — 2016-11-23
* Update to *rustc 1.15.0-nightly (7b3eeea22 2016-11-21)*
* New lint: [`string_extend_chars`]
## 0.0.100 — 2016-11-20
* Update to *rustc 1.15.0-nightly (ac635aa95 2016-11-18)*
## 0.0.99 — 2016-11-18
* Update to rustc 1.15.0-nightly (0ed951993 2016-11-14)
* New lint: [`get_unwrap`]
## 0.0.98 — 2016-11-08
* Fixes an issue due to a change in how cargo handles `--sysroot`, which broke `cargo clippy`
## 0.0.97 — 2016-11-03
* For convenience, `cargo clippy` defines a `cargo-clippy` feature. This was
previously added for a short time under the name `clippy` but removed for
compatibility.
* `cargo clippy --help` is more helping (and less helpful :smile:)
* Rustup to *rustc 1.14.0-nightly (5665bdf3e 2016-11-02)*
* New lints: [`if_let_redundant_pattern_matching`], [`partialeq_ne_impl`]
## 0.0.96 — 2016-10-22
* Rustup to *rustc 1.14.0-nightly (f09420685 2016-10-20)*
* New lint: [`iter_skip_next`]
## 0.0.95 — 2016-10-06
* Rustup to *rustc 1.14.0-nightly (3210fd5c2 2016-10-05)*
## 0.0.94 — 2016-10-04
* Fixes bustage on Windows due to forbidden directory name
## 0.0.93 — 2016-10-03
* Rustup to *rustc 1.14.0-nightly (144af3e97 2016-10-02)*
* `option_map_unwrap_or` and `option_map_unwrap_or_else` are now
allowed by default.
* New lint: [`explicit_into_iter_loop`]
## 0.0.92 — 2016-09-30
* Rustup to *rustc 1.14.0-nightly (289f3a4ca 2016-09-29)*
## 0.0.91 — 2016-09-28
* Rustup to *rustc 1.13.0-nightly (d0623cf7b 2016-09-26)*
## 0.0.90 — 2016-09-09
* Rustup to *rustc 1.13.0-nightly (f1f40f850 2016-09-09)*
## 0.0.89 — 2016-09-06
* Rustup to *rustc 1.13.0-nightly (cbe4de78e 2016-09-05)*
## 0.0.88 — 2016-09-04
* Rustup to *rustc 1.13.0-nightly (70598e04f 2016-09-03)*
* The following lints are not new but were only usable through the `clippy`
lint groups: [`filter_next`], `for_loop_over_option`,
`for_loop_over_result` and [`match_overlapping_arm`]. You should now be
able to `#[allow/deny]` them individually and they are available directly
through `cargo clippy`.
## 0.0.87 — 2016-08-31
* Rustup to *rustc 1.13.0-nightly (eac41469d 2016-08-30)*
* New lints: [`builtin_type_shadow`]
* Fix FP in [`zero_prefixed_literal`] and `0b`/`0o`
## 0.0.86 — 2016-08-28
* Rustup to *rustc 1.13.0-nightly (a23064af5 2016-08-27)*
* New lints: [`missing_docs_in_private_items`], [`zero_prefixed_literal`]
## 0.0.85 — 2016-08-19
* Fix ICE with [`useless_attribute`]
* [`useless_attribute`] ignores `unused_imports` on `use` statements
## 0.0.84 — 2016-08-18
* Rustup to *rustc 1.13.0-nightly (aef6971ca 2016-08-17)*
## 0.0.83 — 2016-08-17
* Rustup to *rustc 1.12.0-nightly (1bf5fa326 2016-08-16)*
* New lints: [`print_with_newline`], [`useless_attribute`]
## 0.0.82 — 2016-08-17
* Rustup to *rustc 1.12.0-nightly (197be89f3 2016-08-15)*
* New lint: [`module_inception`]
## 0.0.81 — 2016-08-14
* Rustup to *rustc 1.12.0-nightly (1deb02ea6 2016-08-12)*
* New lints: [`eval_order_dependence`], [`mixed_case_hex_literals`], [`unseparated_literal_suffix`]
* False positive fix in [`too_many_arguments`]
* Addition of functionality to [`needless_borrow`]
* Suggestions for [`clone_on_copy`]
* Bug fix in [`wrong_self_convention`]
* Doc improvements
## 0.0.80 — 2016-07-31
* Rustup to *rustc 1.12.0-nightly (1225e122f 2016-07-30)*
* New lints: [`misrefactored_assign_op`], [`serde_api_misuse`]
## 0.0.79 — 2016-07-10
* Rustup to *rustc 1.12.0-nightly (f93aaf84c 2016-07-09)*
* Major suggestions refactoring
## 0.0.78 — 2016-07-02
* Rustup to *rustc 1.11.0-nightly (01411937f 2016-07-01)*
* New lints: [`wrong_transmute`], [`double_neg`], [`filter_map`]
* For compatibility, `cargo clippy` does not defines the `clippy` feature
introduced in 0.0.76 anymore
* [`collapsible_if`] now considers `if let`
## 0.0.77 — 2016-06-21
* Rustup to *rustc 1.11.0-nightly (5522e678b 2016-06-20)*
* New lints: `stutter` and [`iter_nth`]
## 0.0.76 — 2016-06-10
* Rustup to *rustc 1.11.0-nightly (7d2f75a95 2016-06-09)*
* `cargo clippy` now automatically defines the `clippy` feature
* New lint: [`not_unsafe_ptr_arg_deref`]
## 0.0.75 — 2016-06-08
* Rustup to *rustc 1.11.0-nightly (763f9234b 2016-06-06)*
## 0.0.74 — 2016-06-07
* Fix bug with `cargo-clippy` JSON parsing
* Add the `CLIPPY_DISABLE_DOCS_LINKS` environment variable to deactivate the
“for further information visit *lint-link*” message.
## 0.0.73 — 2016-06-05
* Fix false positives in [`useless_let_if_seq`]
## 0.0.72 — 2016-06-04
* Fix false positives in [`useless_let_if_seq`]
## 0.0.71 — 2016-05-31
* Rustup to *rustc 1.11.0-nightly (a967611d8 2016-05-30)*
* New lint: [`useless_let_if_seq`]
## 0.0.70 — 2016-05-28
* Rustup to *rustc 1.10.0-nightly (7bddce693 2016-05-27)*
* [`invalid_regex`] and [`trivial_regex`] can now warn on `RegexSet::new`,
`RegexBuilder::new` and byte regexes
## 0.0.69 — 2016-05-20
* Rustup to *rustc 1.10.0-nightly (476fe6eef 2016-05-21)*
* [`used_underscore_binding`] has been made `Allow` temporarily
## 0.0.68 — 2016-05-17
* Rustup to *rustc 1.10.0-nightly (cd6a40017 2016-05-16)*
* New lint: [`unnecessary_operation`]
## 0.0.67 — 2016-05-12
* Rustup to *rustc 1.10.0-nightly (22ac88f1a 2016-05-11)*
## 0.0.66 — 2016-05-11
* New `cargo clippy` subcommand
* New lints: [`assign_op_pattern`], [`assign_ops`], [`needless_borrow`]
## 0.0.65 — 2016-05-08
* Rustup to *rustc 1.10.0-nightly (62e2b2fb7 2016-05-06)*
* New lints: [`float_arithmetic`], [`integer_arithmetic`]
## 0.0.64 — 2016-04-26
* Rustup to *rustc 1.10.0-nightly (645dd013a 2016-04-24)*
* New lints: `temporary_cstring_as_ptr`, [`unsafe_removed_from_name`], and [`mem_forget`]
## 0.0.63 — 2016-04-08
* Rustup to *rustc 1.9.0-nightly (7979dd608 2016-04-07)*
## 0.0.62 — 2016-04-07
* Rustup to *rustc 1.9.0-nightly (bf5da36f1 2016-04-06)*
## 0.0.61 — 2016-04-03
* Rustup to *rustc 1.9.0-nightly (5ab11d72c 2016-04-02)*
* New lint: [`invalid_upcast_comparisons`]
## 0.0.60 — 2016-04-01
* Rustup to *rustc 1.9.0-nightly (e1195c24b 2016-03-31)*
## 0.0.59 — 2016-03-31
* Rustup to *rustc 1.9.0-nightly (30a3849f2 2016-03-30)*
* New lints: [`logic_bug`], [`nonminimal_bool`]
* Fixed: [`match_same_arms`] now ignores arms with guards
* Improved: [`useless_vec`] now warns on `for … in vec![…]`
## 0.0.58 — 2016-03-27
* Rustup to *rustc 1.9.0-nightly (d5a91e695 2016-03-26)*
* New lint: [`doc_markdown`]
## 0.0.57 — 2016-03-27
* Update to *rustc 1.9.0-nightly (a1e29daf1 2016-03-25)*
* Deprecated lints: [`str_to_string`], [`string_to_string`], [`unstable_as_slice`], [`unstable_as_mut_slice`]
* New lint: [`crosspointer_transmute`]
## 0.0.56 — 2016-03-23
* Update to *rustc 1.9.0-nightly (0dcc413e4 2016-03-22)*
* New lints: [`many_single_char_names`] and [`similar_names`]
## 0.0.55 — 2016-03-21
* Update to *rustc 1.9.0-nightly (02310fd31 2016-03-19)*
## 0.0.54 — 2016-03-16
* Update to *rustc 1.9.0-nightly (c66d2380a 2016-03-15)*
## 0.0.53 — 2016-03-15
* Add a [configuration file]
## ~~0.0.52~~
## 0.0.51 — 2016-03-13
* Add `str` to types considered by [`len_zero`]
* New lints: [`indexing_slicing`]
## 0.0.50 — 2016-03-11
* Update to *rustc 1.9.0-nightly (c9629d61c 2016-03-10)*
## 0.0.49 — 2016-03-09
* Update to *rustc 1.9.0-nightly (eabfc160f 2016-03-08)*
* New lints: [`overflow_check_conditional`], `unused_label`, [`new_without_default`]
## 0.0.48 — 2016-03-07
* Fixed: ICE in [`needless_range_loop`] with globals
## 0.0.47 — 2016-03-07
* Update to *rustc 1.9.0-nightly (998a6720b 2016-03-07)*
* New lint: [`redundant_closure_call`]
[`AsMut`]: https://doc.rust-lang.org/std/convert/trait.AsMut.html
[`AsRef`]: https://doc.rust-lang.org/std/convert/trait.AsRef.html
[configuration file]: ./rust-clippy#configuration
[pull3665]: https://github.com/rust-lang/rust-clippy/pull/3665
[adding_lints]: https://github.com/rust-lang/rust-clippy/blob/master/book/src/development/adding_lints.md
[`README.md`]: https://github.com/rust-lang/rust-clippy/blob/master/README.md
[Clippy's lint list]: https://rust-lang.github.io/rust-clippy/master/index.html
<!-- lint disable no-unused-definitions -->
<!-- begin autogenerated links to lint list -->
[`absolute_paths`]: https://rust-lang.github.io/rust-clippy/master/index.html#absolute_paths
[`absurd_extreme_comparisons`]: https://rust-lang.github.io/rust-clippy/master/index.html#absurd_extreme_comparisons
[`alloc_instead_of_core`]: https://rust-lang.github.io/rust-clippy/master/index.html#alloc_instead_of_core
[`allow_attributes`]: https://rust-lang.github.io/rust-clippy/master/index.html#allow_attributes
[`allow_attributes_without_reason`]: https://rust-lang.github.io/rust-clippy/master/index.html#allow_attributes_without_reason
[`almost_complete_letter_range`]: https://rust-lang.github.io/rust-clippy/master/index.html#almost_complete_letter_range
[`almost_complete_range`]: https://rust-lang.github.io/rust-clippy/master/index.html#almost_complete_range
[`almost_swapped`]: https://rust-lang.github.io/rust-clippy/master/index.html#almost_swapped
[`approx_constant`]: https://rust-lang.github.io/rust-clippy/master/index.html#approx_constant
[`arc_with_non_send_sync`]: https://rust-lang.github.io/rust-clippy/master/index.html#arc_with_non_send_sync
[`arithmetic_side_effects`]: https://rust-lang.github.io/rust-clippy/master/index.html#arithmetic_side_effects
[`as_conversions`]: https://rust-lang.github.io/rust-clippy/master/index.html#as_conversions
[`as_ptr_cast_mut`]: https://rust-lang.github.io/rust-clippy/master/index.html#as_ptr_cast_mut
[`as_underscore`]: https://rust-lang.github.io/rust-clippy/master/index.html#as_underscore
[`assertions_on_constants`]: https://rust-lang.github.io/rust-clippy/master/index.html#assertions_on_constants
[`assertions_on_result_states`]: https://rust-lang.github.io/rust-clippy/master/index.html#assertions_on_result_states
[`assign_op_pattern`]: https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[`assign_ops`]: https://rust-lang.github.io/rust-clippy/master/index.html#assign_ops
[`async_yields_async`]: https://rust-lang.github.io/rust-clippy/master/index.html#async_yields_async
[`await_holding_invalid_type`]: https://rust-lang.github.io/rust-clippy/master/index.html#await_holding_invalid_type
[`await_holding_lock`]: https://rust-lang.github.io/rust-clippy/master/index.html#await_holding_lock
[`await_holding_refcell_ref`]: https://rust-lang.github.io/rust-clippy/master/index.html#await_holding_refcell_ref
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<!-- end autogenerated links to configuration documentation -->
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