this mirrors the behavior of rustdoc-js-std tests.

previously this required COMPILETEST_FORCE_STAGE0.

…ch path

To fix some of the failures in
`COMPILETEST_FORCE_STAGE0=1 ./x test run-make --stage 0`.

…mulacrum

Remove emsdk version update from 1.84.0 relnotes

See [this comment](rust-lang#131467 (comment)). The reproducer in that comment does indeed show that rustup's `rust-std` component is still compiled with the old emscripten ABI because libc's config flag `emscripten_new_stat_abi` is not set.

rust-lang#131533 presumably had no effect because the wrong CI file was modified. So nothing has changed since 1.83.0. The PR author (workingjubilee) is currently on vacation.
Also the issue rust-lang#131467 should be reopened.

…piler-errors

Cleanup `suggest_binding_for_closure_capture_self` diag in borrowck

Mostly grammar fix/improvement, but also a small cleanup to use iterators instead of for loops for collecting into a vector.

…0-rustdoc-js, r=jieyouxu

allow rustdoc-js tests to be run at stage0

this mirrors the behavior of rustdoc-js-std tests.

previously this required COMPILETEST_FORCE_STAGE0.

…k-Simulacrum

Make (unstable API) `UniqueRc` invariant for soundness

Add test case from rust-lang#133572 (comment) (comment in review of `UniqueArc`), and fix the issue for `UniqueRc`.

… r=onur-ozkan

compiletest: include stage0-sysroot libstd dylib in recipe dylib search path

To fix some of the failures in `COMPILETEST_FORCE_STAGE0=1 ./x test run-make --stage 0`. Specifically,

```
COMPILETEST_FORCE_STAGE0=1 ./x test tests/run-make/rustdoc-default-output/ --stage 0
```

should now pass.

Fixes rust-lang#135373. (As in, make *some* of the `run-make` tests pass, other `run-make` tests fail for various reasons against stage0, and generally `run-make` tests are not guaranteed to pass at stage 0.)

cc `@lolbinarycat`

r? bootstrap