…fetime, r=estebank,davidtwco

Place tail expression behind terminating scope

This PR implements rust-lang#123739 so that we can do further experiments in nightly.

A little rewrite has been applied to `for await` lowering. It was previously `unsafe { Pin::unchecked_new(into_async_iter(..)) }`. Under the edition 2024 rule, however, `into_async_iter` gets dropped at the end of the `unsafe` block. This presumably the first Edition 2024 migration rule goes by hoisting `into_async_iter(..)` into `match` one level above, so it now looks like the following.
```rust
match into_async_iter($iter_expr) {
  ref mut iter => match unsafe { Pin::unchecked_new(iter) } {
    ...
  }
}
```

…iaskrgr

Rollup of 6 pull requests

Successful merges:

 - rust-lang#125293 (Place tail expression behind terminating scope)
 - rust-lang#125722 (Indicate in `non_local_defs` lint that the macro needs to change)
 - rust-lang#126192 (Various Redox OS fixes and add i686 Redox OS target)
 - rust-lang#126285 (`UniqueRc`: support allocators and `T: ?Sized`.)
 - rust-lang#126352 (ci: Update centos:7 to use vault repos)
 - rust-lang#126399 (extend the check for LLVM build)

r? `@ghost`
`@rustbot` modify labels: rollup

…fetime, r=estebank,davidtwco

Place tail expression behind terminating scope

This PR implements rust-lang#123739 so that we can do further experiments in nightly.

A little rewrite has been applied to `for await` lowering. It was previously `unsafe { Pin::unchecked_new(into_async_iter(..)) }`. Under the edition 2024 rule, however, `into_async_iter` gets dropped at the end of the `unsafe` block. This presumably the first Edition 2024 migration rule goes by hoisting `into_async_iter(..)` into `match` one level above, so it now looks like the following.
```rust
match into_async_iter($iter_expr) {
  ref mut iter => match unsafe { Pin::unchecked_new(iter) } {
    ...
  }
}
```

Rollup of 10 pull requests

Successful merges:

 - rust-lang#124135 (delegation: Implement glob delegation)
 - rust-lang#125078 (fix: break inside async closure has incorrect span for enclosing closure)
 - rust-lang#125293 (Place tail expression behind terminating scope)
 - rust-lang#126422 (Suggest using a standalone doctest for non-local impl defs)
 - rust-lang#126493 (safe transmute: support non-ZST, variantful, uninhabited enums)
 - rust-lang#126504 (Sync fuchsia test runner with clang test runner)
 - rust-lang#126558 (hir_typeck: be more conservative in making "note caller chooses ty param" note)
 - rust-lang#126586 (Add `@badboy` and `@BlackHoleFox` as Mac Catalyst maintainers)
 - rust-lang#126615 (Add `rustc-ice*` to `.gitignore`)
 - rust-lang#126632 (Replace `move||` with `move ||`)

r? `@ghost`
`@rustbot` modify labels: rollup

Rollup merge of rust-lang#125293 - dingxiangfei2009:tail-expr-temp-lifetime, r=estebank,davidtwco

Place tail expression behind terminating scope

This PR implements rust-lang#123739 so that we can do further experiments in nightly.

A little rewrite has been applied to `for await` lowering. It was previously `unsafe { Pin::unchecked_new(into_async_iter(..)) }`. Under the edition 2024 rule, however, `into_async_iter` gets dropped at the end of the `unsafe` block. This presumably the first Edition 2024 migration rule goes by hoisting `into_async_iter(..)` into `match` one level above, so it now looks like the following.
```rust
match into_async_iter($iter_expr) {
  ref mut iter => match unsafe { Pin::unchecked_new(iter) } {
    ...
  }
}
```