… something

remove the reference to __cxa_thread_atexit_impl

Since both functions are always unwrapped, don't wrap the return value
in an `Option`.

Correctly suggest adding bounds to `impl Trait` argument

Fix rust-lang#63706.

…ted, r=oli-obk

Resolve some small issues related to rust-lang#63580

This resolves some feedback left on rust-lang#63580 after it was merged:

- Adds documentation to `mir::Static` and `mir::StaticKind`
- Simplifies `maybe_get_optimized_mir()` and `maybe_get_promoted_mir()`

cc @bjorn3 @RalfJung

or-pattern: fix typo in error message

cc rust-lang#54883.

Recover `mut $pat` and other improvements

- Recover on e.g. `mut Foo(x, y)` and suggest `Foo(mut x, mut y)`. Fixes rust-lang#63764.
- Recover on e.g. `let mut mut x;`
- Recover on e.g. `let keyword` and `let keyword(...)`.
- Cleanups in `token.rs` with `fn is_non_raw_ident_where` and friends.

const_prop: only call error_to_const_error if we are actually showing something

This makes `RUSTC_CTFE_BACKTRACE` useful again.

r? @oli-obk

Fixes rust-lang#63439

…, r=estebank

Add Option<Span> to `require_lang_item`

Fixes rust-lang#63954

I'm not sure where to take `Some(span)` or something so I use `None` in many places.
r? @estebank

remove the reference to __cxa_thread_atexit_impl

r? @alexcrichton

cc @n-salim

…michaelwoerister

Prevent syntax error in LD linker version script

As discussed in rust-lang#63925, there is an edge case in which an invalid LD version script is generated when building a `cdylib` with no exported symbols. This PR makes a slight modification to the  LD version script generation by first checking to see if any symbols need to be exported. If not, the `global` section of the linker script is simply omitted, and the syntax error is averted.

rustc_apfloat: make the crate #![no_std] explicitly.

We only need allocation, and even that could be made optional.

Notify me (flip1995) when Clippy toolstate changes

I want in on the fun 🎉

Also friendly ping @llogiq @mcarton: Since you two aren't _that_ active on the Clippy repo anymore, do you still want to get pinged on Clippy toolstate changes?

r? @oli-obk

add missing `#[repr(C)]` on the Slices union

Adds the `#[repr(C)]` attribute to the `Slices` union used to convert an `&str` into a `&[u8]`.
Without the attribute, the union has an unspecified layout: https://doc.rust-lang.org/reference/types/union.html, so performing the 'transmute' is unsound without the attribute (as far as I understand).

The `Repr` union, used for converting a raw ptr + len to a slice has this attribute as well:
https://github.com/rust-lang/rust/blob/master/src/libcore/ptr/mod.rs#L211-#L216