Restrict unnecessary_sort_by to non-reference, Copy types
`Vec::sort_by_key` closure parameter is `F: FnMut(&T) -> K`. The lint's suggestion destructures the `T` parameter; this was probably done to avoid different unnamed lifetimes when `K = Reverse<&T>`.
This change fixes two issues:
* Destructuring T when T is non-reference requires the type to be Copy, otherwise we would try to move from a shared reference. We make sure `T: Copy` holds.
* Make sure `T` is actually non-reference. I didn't go for destructuring multiple levels of references, as we would have to compensate in the closure body by removing derefs and maybe adding parens, which would add more complexity.
changelog: Restrict [`unnecessary_sort_by`] to non-reference, Copy types
Fixes#6001
Fix FP in `same_item_push`
Don't emit a lint when the pushed item doesn't have Clone trait
Fix#5979
changelog: Fix FP in `same_item_push` not to emit a lint when the pushed item doesn't have Clone trait
Show line count and max lines in too_many_lines lint message
This PR adds the current amount of lines and the current maximum number of lines in the message for the `too_many_lines` lint, in a similar way as the `too_many_arguments` lint currently does.
changelog: show the line count and the maximum lines in the message for the `too_many_lines` lint.
useless_attribute: Permit wildcard_imports and enum_glob_use
Fixes#5918
changelog: `useless_attribute`: Permit `wildcard_imports` and `enum_glob_use` on `use` items
Improve recovery on malformed format call
The token following a format expression should be a comma. However, when it is replaced with a similar token (such as a dot), then the corresponding error is emitted, but the token is treated as a comma, and the parsing step continues.
r? @petrochenkov
Fix a fp in `transmute_ptr_to_ptr`
fixes#5959
changelog: Fix a false positive in `transmute_ptr_to_ptr` that the lint fires when `transmute` is used to cast a reference in const contexts although dereferencing raw pointers in consts is unstable.
default_trait_access: Fix wrong suggestion
https://github.com/rust-lang/rust-clippy/issues/5975#issuecomment-683751131
> I think the underlying problem is clippy suggests code with complete parameters, not clippy triggers this lint even for complex types. AFAIK, If code compiles with `Default::default`, it doesn't need to specify any parameters, as type inference is working. (So, in this case, `default_trait_access` should suggest `RefCell::default`.)
Fixes#5975Fixes#5990
changelog: `default_trait_access`: fixed wrong suggestion
Add a lint for an async block/closure that yields a type that is itself awaitable.
This catches bugs of the form
tokio::spawn(async move {
let f = some_async_thing();
f // Oh no I forgot to await f so that work will never complete.
});
See the two XXXkhuey comments and the unfixed `_l` structure for things that need more thought.
*Please keep the line below*
changelog: none
or_fn_call: ignore nullary associated const fns
The fix in #5889 was missing associated functions.
changelog: Ignore also `const fn` methods in [`or_fun_call`]
Fixes#5693
This catches bugs of the form
tokio::spawn(async move {
let f = some_async_thing();
f // Oh no I forgot to await f so that work will never complete.
});
