lint_array_into_iter = this method call resolves to `<&{$target} as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <{$target} as IntoIterator>::into_iter in Rust 2021 .use_iter_suggestion = use `.iter()` instead of `.into_iter()` to avoid ambiguity .remove_into_iter_suggestion = or remove `.into_iter()` to iterate by value .use_explicit_into_iter_suggestion = or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value lint_atomic_ordering_fence = memory fences cannot have `Relaxed` ordering .help = consider using ordering modes `Acquire`, `Release`, `AcqRel` or `SeqCst` lint_atomic_ordering_invalid = `{$method}`'s failure ordering may not be `Release` or `AcqRel`, since a failed `{$method}` does not result in a write .label = invalid failure ordering .help = consider using `Acquire` or `Relaxed` failure ordering instead lint_atomic_ordering_load = atomic loads cannot have `Release` or `AcqRel` ordering .help = consider using ordering modes `Acquire`, `SeqCst` or `Relaxed` lint_atomic_ordering_store = atomic stores cannot have `Acquire` or `AcqRel` ordering .help = consider using ordering modes `Release`, `SeqCst` or `Relaxed` lint_bad_attribute_argument = bad attribute argument lint_bad_opt_access = {$msg} lint_builtin_allow_internal_unsafe = `allow_internal_unsafe` allows defining macros using unsafe without triggering the `unsafe_code` lint at their call site lint_builtin_anonymous_params = anonymous parameters are deprecated and will be removed in the next edition .suggestion = try naming the parameter or explicitly ignoring it lint_builtin_asm_labels = avoid using named labels in inline assembly lint_builtin_box_pointers = type uses owned (Box type) pointers: {$ty} lint_builtin_clashing_extern_diff_name = `{$this}` redeclares `{$orig}` with a different signature .previous_decl_label = `{$orig}` previously declared here .mismatch_label = this signature doesn't match the previous declaration lint_builtin_clashing_extern_same_name = `{$this}` redeclared with a different signature .previous_decl_label = `{$orig}` previously declared here .mismatch_label = this signature doesn't match the previous declaration lint_builtin_const_no_mangle = const items should never be `#[no_mangle]` .suggestion = try a static value lint_builtin_decl_unsafe_fn = declaration of an `unsafe` function lint_builtin_decl_unsafe_method = declaration of an `unsafe` method lint_builtin_deprecated_attr_default_suggestion = remove this attribute lint_builtin_deprecated_attr_link = use of deprecated attribute `{$name}`: {$reason}. See {$link} .msg_suggestion = {$msg} .default_suggestion = remove this attribute lint_builtin_deprecated_attr_used = use of deprecated attribute `{$name}`: no longer used. lint_builtin_deref_nullptr = dereferencing a null pointer .label = this code causes undefined behavior when executed lint_builtin_ellipsis_inclusive_range_patterns = `...` range patterns are deprecated .suggestion = use `..=` for an inclusive range lint_builtin_explicit_outlives = outlives requirements can be inferred .suggestion = remove {$count -> [one] this bound *[other] these bounds } lint_builtin_export_name_fn = declaration of a function with `export_name` lint_builtin_export_name_method = declaration of a method with `export_name` lint_builtin_export_name_static = declaration of a static with `export_name` lint_builtin_impl_unsafe_method = implementation of an `unsafe` method lint_builtin_incomplete_features = the feature `{$name}` is incomplete and may not be safe to use and/or cause compiler crashes .note = see issue #{$n} for more information .help = consider using `min_{$name}` instead, which is more stable and complete lint_builtin_internal_features = the feature `{$name}` is internal to the compiler or standard library .note = using it is strongly discouraged lint_builtin_keyword_idents = `{$kw}` is a keyword in the {$next} edition .suggestion = you can use a raw identifier to stay compatible lint_builtin_link_section_fn = declaration of a function with `link_section` lint_builtin_link_section_static = declaration of a static with `link_section` lint_builtin_missing_copy_impl = type could implement `Copy`; consider adding `impl Copy` lint_builtin_missing_debug_impl = type does not implement `{$debug}`; consider adding `#[derive(Debug)]` or a manual implementation lint_builtin_missing_doc = missing documentation for {$article} {$desc} lint_builtin_mutable_transmutes = transmuting &T to &mut T is undefined behavior, even if the reference is unused, consider instead using an UnsafeCell lint_builtin_no_mangle_fn = declaration of a `no_mangle` function lint_builtin_no_mangle_generic = functions generic over types or consts must be mangled .suggestion = remove this attribute lint_builtin_no_mangle_method = declaration of a `no_mangle` method lint_builtin_no_mangle_static = declaration of a `no_mangle` static lint_builtin_non_shorthand_field_patterns = the `{$ident}:` in this pattern is redundant .suggestion = use shorthand field pattern lint_builtin_overridden_symbol_name = the linker's behavior with multiple libraries exporting duplicate symbol names is undefined and Rust cannot provide guarantees when you manually override them lint_builtin_overridden_symbol_section = the program's behavior with overridden link sections on items is unpredictable and Rust cannot provide guarantees when you manually override them lint_builtin_special_module_name_used_lib = found module declaration for lib.rs .note = lib.rs is the root of this crate's library target .help = to refer to it from other targets, use the library's name as the path lint_builtin_special_module_name_used_main = found module declaration for main.rs .note = a binary crate cannot be used as library lint_builtin_trivial_bounds = {$predicate_kind_name} bound {$predicate} does not depend on any type or lifetime parameters lint_builtin_type_alias_bounds_help = use fully disambiguated paths (i.e., `::Assoc`) to refer to associated types in type aliases lint_builtin_type_alias_generic_bounds = bounds on generic parameters are not enforced in type aliases .suggestion = the bound will not be checked when the type alias is used, and should be removed lint_builtin_type_alias_where_clause = where clauses are not enforced in type aliases .suggestion = the clause will not be checked when the type alias is used, and should be removed lint_builtin_unexpected_cli_config_name = unexpected `{$name}` as condition name .help = was set with `--cfg` but isn't in the `--check-cfg` expected names lint_builtin_unexpected_cli_config_value = unexpected condition value `{$value}` for condition name `{$name}` .help = was set with `--cfg` but isn't in the `--check-cfg` expected values lint_builtin_unpermitted_type_init_label = this code causes undefined behavior when executed lint_builtin_unpermitted_type_init_label_suggestion = help: use `MaybeUninit` instead, and only call `assume_init` after initialization is done lint_builtin_unpermitted_type_init_uninit = the type `{$ty}` does not permit being left uninitialized lint_builtin_unpermitted_type_init_zeroed = the type `{$ty}` does not permit zero-initialization lint_builtin_unreachable_pub = unreachable `pub` {$what} .suggestion = consider restricting its visibility .help = or consider exporting it for use by other crates lint_builtin_unsafe_block = usage of an `unsafe` block lint_builtin_unsafe_impl = implementation of an `unsafe` trait lint_builtin_unsafe_trait = declaration of an `unsafe` trait lint_builtin_unstable_features = unstable feature lint_builtin_unused_doc_comment = unused doc comment .label = rustdoc does not generate documentation for {$kind} .plain_help = use `//` for a plain comment .block_help = use `/* */` for a plain comment lint_builtin_while_true = denote infinite loops with `loop {"{"} ... {"}"}` .suggestion = use `loop` lint_check_name_deprecated = lint name `{$lint_name}` is deprecated and does not have an effect anymore. Use: {$new_name} lint_check_name_unknown = unknown lint: `{$lint_name}` .help = did you mean: `{$suggestion}` lint_check_name_unknown_tool = unknown lint tool: `{$tool_name}` lint_check_name_warning = {$msg} lint_command_line_source = `forbid` lint level was set on command line lint_confusable_identifier_pair = found both `{$existing_sym}` and `{$sym}` as identifiers, which look alike .current_use = this identifier can be confused with `{$existing_sym}` .other_use = other identifier used here lint_cstring_ptr = getting the inner pointer of a temporary `CString` .as_ptr_label = this pointer will be invalid .unwrap_label = this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime .note = pointers do not have a lifetime; when calling `as_ptr` the `CString` will be deallocated at the end of the statement because nothing is referencing it as far as the type system is concerned .help = for more information, see https://doc.rust-lang.org/reference/destructors.html lint_default_hash_types = prefer `{$preferred}` over `{$used}`, it has better performance .note = a `use rustc_data_structures::fx::{$preferred}` may be necessary lint_default_source = `forbid` lint level is the default for {$id} lint_deprecated_lint_name = lint name `{$name}` is deprecated and may not have an effect in the future. .suggestion = change it to lint_diag_out_of_impl = diagnostics should only be created in `IntoDiagnostic`/`AddToDiagnostic` impls lint_drop_glue = types that do not implement `Drop` can still have drop glue, consider instead using `{$needs_drop}` to detect whether a type is trivially dropped lint_drop_trait_constraints = bounds on `{$predicate}` are most likely incorrect, consider instead using `{$needs_drop}` to detect whether a type can be trivially dropped lint_dropping_copy_types = calls to `std::mem::drop` with a value that implements `Copy` does nothing .label = argument has type `{$arg_ty}` .note = use `let _ = ...` to ignore the expression or result lint_dropping_references = calls to `std::mem::drop` with a reference instead of an owned value does nothing .label = argument has type `{$arg_ty}` .note = use `let _ = ...` to ignore the expression or result lint_enum_intrinsics_mem_discriminant = the return value of `mem::discriminant` is unspecified when called with a non-enum type .note = the argument to `discriminant` should be a reference to an enum, but it was passed a reference to a `{$ty_param}`, which is not an enum. lint_enum_intrinsics_mem_variant = the return value of `mem::variant_count` is unspecified when called with a non-enum type .note = the type parameter of `variant_count` should be an enum, but it was instantiated with the type `{$ty_param}`, which is not an enum. lint_expectation = this lint expectation is unfulfilled .note = the `unfulfilled_lint_expectations` lint can't be expected and will always produce this message .rationale = {$rationale} lint_for_loops_over_fallibles = for loop over {$article} `{$ty}`. This is more readably written as an `if let` statement .suggestion = consider using `if let` to clear intent .remove_next = to iterate over `{$recv_snip}` remove the call to `next` .use_while_let = to check pattern in a loop use `while let` .use_question_mark = consider unwrapping the `Result` with `?` to iterate over its contents lint_forgetting_copy_types = calls to `std::mem::forget` with a value that implements `Copy` does nothing .label = argument has type `{$arg_ty}` .note = use `let _ = ...` to ignore the expression or result lint_forgetting_references = calls to `std::mem::forget` with a reference instead of an owned value does nothing .label = argument has type `{$arg_ty}` .note = use `let _ = ...` to ignore the expression or result lint_hidden_unicode_codepoints = unicode codepoint changing visible direction of text present in {$label} .label = this {$label} contains {$count -> [one] an invisible *[other] invisible } unicode text flow control {$count -> [one] codepoint *[other] codepoints } .note = these kind of unicode codepoints change the way text flows on applications that support them, but can cause confusion because they change the order of characters on the screen .suggestion_remove = if their presence wasn't intentional, you can remove them .suggestion_escape = if you want to keep them but make them visible in your source code, you can escape them .no_suggestion_note_escape = if you want to keep them but make them visible in your source code, you can escape them: {$escaped} lint_identifier_non_ascii_char = identifier contains non-ASCII characters lint_identifier_uncommon_codepoints = identifier contains uncommon Unicode codepoints lint_ignored_unless_crate_specified = {$level}({$name}) is ignored unless specified at crate level lint_improper_ctypes = `extern` {$desc} uses type `{$ty}`, which is not FFI-safe .label = not FFI-safe .note = the type is defined here lint_improper_ctypes_128bit = 128-bit integers don't currently have a known stable ABI lint_improper_ctypes_array_help = consider passing a pointer to the array lint_improper_ctypes_array_reason = passing raw arrays by value is not FFI-safe lint_improper_ctypes_box = box cannot be represented as a single pointer lint_improper_ctypes_char_help = consider using `u32` or `libc::wchar_t` instead lint_improper_ctypes_char_reason = the `char` type has no C equivalent lint_improper_ctypes_dyn = trait objects have no C equivalent lint_improper_ctypes_enum_repr_help = consider adding a `#[repr(C)]`, `#[repr(transparent)]`, or integer `#[repr(...)]` attribute to this enum lint_improper_ctypes_enum_repr_reason = enum has no representation hint lint_improper_ctypes_fnptr_help = consider using an `extern fn(...) -> ...` function pointer instead lint_improper_ctypes_fnptr_reason = this function pointer has Rust-specific calling convention lint_improper_ctypes_non_exhaustive = this enum is non-exhaustive lint_improper_ctypes_non_exhaustive_variant = this enum has non-exhaustive variants lint_improper_ctypes_only_phantomdata = composed only of `PhantomData` lint_improper_ctypes_opaque = opaque types have no C equivalent lint_improper_ctypes_slice_help = consider using a raw pointer instead lint_improper_ctypes_slice_reason = slices have no C equivalent lint_improper_ctypes_str_help = consider using `*const u8` and a length instead lint_improper_ctypes_str_reason = string slices have no C equivalent lint_improper_ctypes_struct_fieldless_help = consider adding a member to this struct lint_improper_ctypes_struct_fieldless_reason = this struct has no fields lint_improper_ctypes_struct_layout_help = consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct lint_improper_ctypes_struct_layout_reason = this struct has unspecified layout lint_improper_ctypes_struct_non_exhaustive = this struct is non-exhaustive lint_improper_ctypes_struct_zst = this struct contains only zero-sized fields lint_improper_ctypes_tuple_help = consider using a struct instead lint_improper_ctypes_tuple_reason = tuples have unspecified layout lint_improper_ctypes_union_fieldless_help = consider adding a member to this union lint_improper_ctypes_union_fieldless_reason = this union has no fields lint_improper_ctypes_union_layout_help = consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this union lint_improper_ctypes_union_layout_reason = this union has unspecified layout lint_improper_ctypes_union_non_exhaustive = this union is non-exhaustive # FIXME: we should ordinalize $valid_up_to when we add support for doing so lint_invalid_from_utf8_checked = calls to `{$method}` with a invalid literal always return an error .label = the literal was valid UTF-8 up to the {$valid_up_to} bytes # FIXME: we should ordinalize $valid_up_to when we add support for doing so lint_invalid_from_utf8_unchecked = calls to `{$method}` with a invalid literal are undefined behavior .label = the literal was valid UTF-8 up to the {$valid_up_to} bytes lint_invalid_nan_comparisons_eq_ne = incorrect NaN comparison, NaN cannot be directly compared to itself .suggestion = use `f32::is_nan()` or `f64::is_nan()` instead lint_invalid_nan_comparisons_lt_le_gt_ge = incorrect NaN comparison, NaN is not orderable lint_invalid_reference_casting_assign_to_ref = assigning to `&T` is undefined behavior, consider using an `UnsafeCell` .label = casting happend here lint_invalid_reference_casting_borrow_as_mut = casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell` .label = casting happend here lint_lintpass_by_hand = implementing `LintPass` by hand .help = try using `declare_lint_pass!` or `impl_lint_pass!` instead lint_malformed_attribute = malformed lint attribute input lint_map_unit_fn = `Iterator::map` call that discard the iterator's values .note = `Iterator::map`, like many of the methods on `Iterator`, gets executed lazily, meaning that its effects won't be visible until it is iterated .function_label = this function returns `()`, which is likely not what you wanted .argument_label = called `Iterator::map` with callable that returns `()` .map_label = after this call to map, the resulting iterator is `impl Iterator`, which means the only information carried by the iterator is the number of items .suggestion = you might have meant to use `Iterator::for_each` lint_mixed_script_confusables = the usage of Script Group `{$set}` in this crate consists solely of mixed script confusables .includes_note = the usage includes {$includes} .note = please recheck to make sure their usages are indeed what you want lint_multiple_supertrait_upcastable = `{$ident}` is object-safe and has multiple supertraits lint_node_source = `forbid` level set here .note = {$reason} lint_non_binding_let_multi_suggestion = consider immediately dropping the value lint_non_binding_let_on_drop_type = non-binding let on a type that implements `Drop` lint_non_binding_let_on_sync_lock = non-binding let on a synchronization lock lint_non_binding_let_suggestion = consider binding to an unused variable to avoid immediately dropping the value lint_non_camel_case_type = {$sort} `{$name}` should have an upper camel case name .suggestion = convert the identifier to upper camel case .label = should have an UpperCamelCase name lint_non_existent_doc_keyword = found non-existing keyword `{$keyword}` used in `#[doc(keyword = "...")]` .help = only existing keywords are allowed in core/std lint_non_fmt_panic = panic message is not a string literal .note = this usage of `{$name}!()` is deprecated; it will be a hard error in Rust 2021 .more_info_note = for more information, see .supports_fmt_note = the `{$name}!()` macro supports formatting, so there's no need for the `format!()` macro here .supports_fmt_suggestion = remove the `format!(..)` macro call .display_suggestion = add a "{"{"}{"}"}" format string to `Display` the message .debug_suggestion = add a "{"{"}:?{"}"}" format string to use the `Debug` implementation of `{$ty}` .panic_suggestion = {$already_suggested -> [true] or use *[false] use } std::panic::panic_any instead lint_non_fmt_panic_braces = panic message contains {$count -> [one] a brace *[other] braces } .note = this message is not used as a format string, but will be in Rust 2021 .suggestion = add a "{"{"}{"}"}" format string to use the message literally lint_non_fmt_panic_unused = panic message contains {$count -> [one] an unused *[other] unused } formatting {$count -> [one] placeholder *[other] placeholders } .note = this message is not used as a format string when given without arguments, but will be in Rust 2021 .add_args_suggestion = add the missing {$count -> [one] argument *[other] arguments } .add_fmt_suggestion = or add a "{"{"}{"}"}" format string to use the message literally lint_non_snake_case = {$sort} `{$name}` should have a snake case name .rename_or_convert_suggestion = rename the identifier or convert it to a snake case raw identifier .cannot_convert_note = `{$sc}` cannot be used as a raw identifier .rename_suggestion = rename the identifier .convert_suggestion = convert the identifier to snake case .help = convert the identifier to snake case: `{$sc}` .label = should have a snake_case name lint_non_upper_case_global = {$sort} `{$name}` should have an upper case name .suggestion = convert the identifier to upper case .label = should have an UPPER_CASE name lint_noop_method_call = call to `.{$method}()` on a reference in this situation does nothing .suggestion = remove this redundant call .note = the type `{$orig_ty}` does not implement `{$trait_}`, so calling `{$method}` on `&{$orig_ty}` copies the reference, which does not do anything and can be removed lint_only_cast_u8_to_char = only `u8` can be cast into `char` .suggestion = use a `char` literal instead lint_opaque_hidden_inferred_bound = opaque type `{$ty}` does not satisfy its associated type bounds .specifically = this associated type bound is unsatisfied for `{$proj_ty}` lint_opaque_hidden_inferred_bound_sugg = add this bound lint_overflowing_bin_hex = literal out of range for `{$ty}` .negative_note = the literal `{$lit}` (decimal `{$dec}`) does not fit into the type `{$ty}` .negative_becomes_note = and the value `-{$lit}` will become `{$actually}{$ty}` .positive_note = the literal `{$lit}` (decimal `{$dec}`) does not fit into the type `{$ty}` and will become `{$actually}{$ty}` .suggestion = consider using the type `{$suggestion_ty}` instead .sign_bit_suggestion = to use as a negative number (decimal `{$negative_val}`), consider using the type `{$uint_ty}` for the literal and cast it to `{$int_ty}` .help = consider using the type `{$suggestion_ty}` instead lint_overflowing_int = literal out of range for `{$ty}` .note = the literal `{$lit}` does not fit into the type `{$ty}` whose range is `{$min}..={$max}` .help = consider using the type `{$suggestion_ty}` instead lint_overflowing_literal = literal out of range for `{$ty}` .note = the literal `{$lit}` does not fit into the type `{$ty}` and will be converted to `{$ty}::INFINITY` lint_overflowing_uint = literal out of range for `{$ty}` .note = the literal `{$lit}` does not fit into the type `{$ty}` whose range is `{$min}..={$max}` lint_overruled_attribute = {$lint_level}({$lint_source}) incompatible with previous forbid .label = overruled by previous forbid lint_pass_by_value = passing `{$ty}` by reference .suggestion = try passing by value lint_path_statement_drop = path statement drops value .suggestion = use `drop` to clarify the intent lint_path_statement_no_effect = path statement with no effect lint_ptr_null_checks_fn_ptr = function pointers are not nullable, so checking them for null will always return false .help = wrap the function pointer inside an `Option` and use `Option::is_none` to check for null pointer value .label = expression has type `{$orig_ty}` lint_ptr_null_checks_ref = references are not nullable, so checking them for null will always return false .label = expression has type `{$orig_ty}` lint_query_instability = using `{$query}` can result in unstable query results .note = if you believe this case to be fine, allow this lint and add a comment explaining your rationale lint_range_endpoint_out_of_range = range endpoint is out of range for `{$ty}` lint_range_use_inclusive_range = use an inclusive range instead lint_reason_must_be_string_literal = reason must be a string literal lint_reason_must_come_last = reason in lint attribute must come last lint_redundant_semicolons = unnecessary trailing {$multiple -> [true] semicolons *[false] semicolon } .suggestion = remove {$multiple -> [true] these semicolons *[false] this semicolon } lint_renamed_or_removed_lint = {$msg} .suggestion = use the new name lint_requested_level = requested on the command line with `{$level} {$lint_name}` lint_supertrait_as_deref_target = `{$t}` implements `Deref` with supertrait `{$target_principal}` as target .label = target type is set here lint_suspicious_double_ref_clone = using `.clone()` on a double reference, which returns `{$ty}` instead of cloning the inner type lint_suspicious_double_ref_deref = using `.deref()` on a double reference, which returns `{$ty}` instead of dereferencing the inner type lint_trivial_untranslatable_diag = diagnostic with static strings only lint_ty_qualified = usage of qualified `ty::{$ty}` .suggestion = try importing it and using it unqualified lint_tykind = usage of `ty::TyKind` .help = try using `Ty` instead lint_tykind_kind = usage of `ty::TyKind::` .suggestion = try using `ty::` directly lint_undropped_manually_drops = calls to `std::mem::drop` with `std::mem::ManuallyDrop` instead of the inner value does nothing .label = argument has type `{$arg_ty}` .suggestion = use `std::mem::ManuallyDrop::into_inner` to get the inner value lint_ungated_async_fn_track_caller = `#[track_caller]` on async functions is a no-op .label = this function will not propagate the caller location lint_unknown_gated_lint = unknown lint: `{$name}` .note = the `{$name}` lint is unstable lint_unknown_lint = unknown lint: `{$name}` .suggestion = did you mean lint_unknown_tool_in_scoped_lint = unknown tool name `{$tool_name}` found in scoped lint: `{$tool_name}::{$lint_name}` .help = add `#![register_tool({$tool_name})]` to the crate root lint_unsupported_group = `{$lint_group}` lint group is not supported with ´--force-warn´ lint_untranslatable_diag = diagnostics should be created using translatable messages lint_unused_allocation = unnecessary allocation, use `&` instead lint_unused_allocation_mut = unnecessary allocation, use `&mut` instead lint_unused_closure = unused {$pre}{$count -> [one] closure *[other] closures }{$post} that must be used .note = closures are lazy and do nothing unless called lint_unused_comparisons = comparison is useless due to type limits lint_unused_def = unused {$pre}`{$def}`{$post} that must be used .suggestion = use `let _ = ...` to ignore the resulting value lint_unused_delim = unnecessary {$delim} around {$item} .suggestion = remove these {$delim} lint_unused_generator = unused {$pre}{$count -> [one] generator *[other] generator }{$post} that must be used .note = generators are lazy and do nothing unless resumed lint_unused_import_braces = braces around {$node} is unnecessary lint_unused_op = unused {$op} that must be used .label = the {$op} produces a value .suggestion = use `let _ = ...` to ignore the resulting value lint_unused_result = unused result of type `{$ty}` lint_variant_size_differences = enum variant is more than three times larger ({$largest} bytes) than the next largest