Corrects the float_equality_without_abs lint
Fixes an issue in the `float_equality_without_abs` lint. The lint suggestion was configured in a way that it lints the whole error and not just the subtraction part. In the current configuration the lint would suggest to change the expression in a wrong way, e.g.
```rust
let _ = (a - b) < f32::EPSILON; // before
let _ = (a - b).abs(); // after
```
This was dicovered by @flip1995. (See discussion of PR #5952).
Also the suggestion is now formatted via `utils::sugg`.
changelog: none
Warn about unknown or renamed lints in rustdoc
Fixes https://github.com/rust-lang/rust/issues/75884.
This is best reviewed one commit at a time.
r? @GuillaumeGomez
Originally I tried to do a much broader refactoring that got rid of `init_lints` altogether. My reasoning is that now the lints aren't being run anymore (after https://github.com/rust-lang/rust/pull/73566), there's no need to ignore them explicitly. But it seems there are still some lints that aren't affected by setting `lint_mod` to a no-op:
```
deny(pub_use_of_private_extern_crate)
deny(const_err)
warn(unused_imports)
```
(there are possibly more, these are just the ones that failed in the rustdoc test suite).
Some of these seem like we really should be warning about, but that's a much larger change and I don't propose to make it here. So for the time being, this just adds the `unknown_lints` and `renamed_or_removed_lints` passes to the list of lints rustdoc warns about.
Fix `let_and_return` bad suggestion
Add a cast to the suggestion when the return expression has adjustments.
These adjustments are lost when the suggestion is applied.
This is similar to the problem in issue #4437.
Closes#5729
changelog: Fix `let_and_return` bad suggestion
Fix fp in `borrow_interior_mutable_const`
fixes#5796
changelog: fix false positive in `borrow_interior_mutable_const` when referencing a field behind a pointer.
Fixes#75904
When emitting move/borrow errors, we may point into a closure to
indicate why an upvar is used in the closure. However, we use the
'upvar span', which is just an arbitrary usage of the upvar. If the
upvar is used in multiple places (e.g. a borrow and a move), we may end
up pointing to the borrow. If the overall error is a move error, this
can be confusing.
This PR tracks the span that caused an upvar to become captured by-value
instead of by-ref (assuming that it's not a `move` closure). We use this
span instead of the 'upvar' span when we need to point to an upvar usage
during borrow checking.
Refactor dynamic library error checking on *nix
The old code was checking `dlerror` more often than necessary, since (unlike `dlsym`) checking the return value of [`dlopen`](https://www.man7.org/linux/man-pages/man3/dlopen.3.html) is enough to indicate whether an error occurred. In the first commit, I've refactored the code to minimize the number of system calls needed. It should be strictly better than the old version.
The second commit is an optional addendum which fixes the issue observed on illumos in #74469, a PR I reviewed that was ultimately closed due to inactivity. I'm not sure how hard we try to work around platform-specific bugs like this, and I believe that, due to the way that `dlerror` is specified in the POSIX standard, libc implementations that want to run on conforming systems cannot call `dlsym` in multi-threaded programs.
Fix incorrect suggestion when `clone_on_ref_ptr` is triggered in macros
In the lint `clone_on_ref_ptr`, if the `span` is in a macro, don't expand it for suggestion.
Fixes: #2076
changelog: none
r? @ebroto
Be consistent when describing a move as a 'partial' in diagnostics
When an error occurs due to a partial move, we would use the world
"partial" in some parts of the error message, but not in others. This
commit ensures that we use the word 'partial' in either all or none of
the diagnostic messages.
Additionally, we no longer describe a move out of a `Box` via `*` as
a 'partial move'. This was a pre-existing issue, but became more
noticable when the word 'partial' is used in more places.
- Give a suggestion even if there is no span available
- Give a more accurate description of the change than 'use the
disambiguator'
- Write much less code
Re-enable len_zero for ranges now that `is_empty` is stable on them
Fixes#5956
Completed stabilization PR: https://github.com/rust-lang/rust/pull/75132
changelog: len_zero: re-enable linting ranges now that range_is_empty is stable
