It was unclear what the implementation does when it encounters existing keys. This change makes it clear by documenting the trait impl.

This example failed to compile because of implicit `Sized` bound
for `A` parameter that wasn't required by `Trait`.

function pointer const parameters.

const_compare_raw_pointers.

Co-Authored-By: varkor <[email protected]>

Updates LLVM to pick up the cherry-picked support for correctly
handling exception handling with aggregates passed by value. This will
be necessary to continue to support Emscripten's exception handling
once we switch using Emscripten's LLVM backend. See rust-lang#63649.

…tion

I've accidentally did `mut_path_buf.jon(a_path);`, expecting this to be an in-place modification. Seems like we can easily warn in such cases?

The dummy Span pointed to the beginning of the source file instead to
where the `#[derive]` is located. Later, it tripped the
`in_derive_expansion(span)` check at `src/librustc/middle/stability.rs`,
causing a span-less deprecation warning to be emitted.

Fixes rust-lang#56195, rust-lang#55417.

Research suggests that we are not properly testing this case anyway, and
even if we were, it is unlikely that we will regress here -- or, perhaps
more accurately, if we do, I am uncertain that we care too much. It
definitely seems like an edge case, and one that is particularly
unlikely to occur as time goes on.

libstd: Fix typos in doc

…varkor

Function pointers as const generic arguments

Makes function pointers as const generic arguments usable.

Fixes rust-lang#62395

r? @varkor

Added doc about behavior of extend on HashMap

It was unclear what the implementation does when it encounters existing keys. This change makes it clear by documenting the trait impl.

…=nikomatsakis

Add some regression tests

- Add a test for rust-lang#62187.
- Clean up the directory structure in `src/test/ui/const-generics`
- Closes rust-lang#64792.
- Closes rust-lang#57399.
- Closes rust-lang#57271.

Add ?Sized bound to a supertrait listing in E0038 error documentation

This example failed to compile because of implicit `Sized` bound for `A` parameter that wasn't required by `Trait`.

…-E0568, r=estebank

Add long error explanation for E0568

Part of rust-lang#61137.

…exceptions, r=nikic

Update LLVM for Emscripten exception handling support

Updates LLVM to pick up the cherry-picked support for correctly
handling exception handling with aggregates passed by value. This will
be necessary to continue to support Emscripten's exception handling
once we switch using Emscripten's LLVM backend. See rust-lang#63649.

…tril

Deduplicate is_{freeze,copy,sized}_raw

Fixes rust-lang#65259

Deduplicates `is_{freeze,copy,sized}_raw` by delegating to a new method which takes in a `LangItem`.

Mark Path::join as must_use

I've accidentally did `mut_path_buf.jon(a_path);`, expecting this to be an in-place modification. Seems like we can easily warn in such cases?

…mulacrum

Don't cc rust-lang/compiler for toolstate changes

Fixes rust-lang#65238.

Query generator kind for error reporting

Fixes rust-lang#65166 (comment)
r? @estebank
cc @cramertj

stability: Do not use `buffer_lint` after lowering to HIR

Fixes rust-lang#65253

Fix suggested bound addition diagnostic

Fixes rust-lang#65284.

deriving: avoid dummy Span on an artificial `type_ident` path

The dummy Span pointed to the beginning of the source file instead to where the `#[derive]` is located. Later, it tripped the `in_derive_expansion(span)` check at `src/librustc/middle/stability.rs`, causing a span-less deprecation warning to be emitted.

Fixes rust-lang#56195, Fixes rust-lang#55417.

…f8-test, r=nikomatsakis

Remove painful test that is not pulling its weight

Research suggests that we are not properly testing this case anyway, and
even if we were, it is unlikely that we will regress here -- or, perhaps
more accurately, if we do, I am uncertain that we care too much. It
definitely seems like an edge case, and one that is particularly
unlikely to occur as time goes on.

Fixes rust-lang#63520