`COPYFILE_ALL` is not yet exposed in `libc`, but the rest of what we need is, so use those definitions instead of manually defining them.

This allows printing them in the Debug impl as well as getting them
again using the get_args() method. This allows programs that would
normally spawn another process to more easily show which program they
would have spawned if not for the fact that the target doesn't support
spawning child processes without requiring intrusive changes to keep the
args. For example rustc compiled to wasi will show the full linker
invocation that would have been done.

…ramEnv

not just the ones from the elaborated clauses.

…nd is assigned

macOS: Use `libc` definitions for copyfile

`COPYFILE_ALL` is not yet exposed in `libc`, but the rest of what we need is, so use those definitions instead of manually defining them.

The definitions were added in rust-lang/libc#2667 and rust-lang/libc#3346.

…=jhpratt

Store all args in the unsupported Command implementation

This allows printing them in the Debug impl as well as getting them again using the get_args() method. This allows programs that would normally spawn another process to more easily show which program they would have spawned if not for the fact that the target doesn't support spawning child processes without requiring intrusive changes to keep the args. For example rustc compiled to wasi will show the full linker invocation that would have been done.

…m-param-env-clauses, r=GuillaumeGomez

rustdoc: synthetic auto: filter out clauses from the implementor's ParamEnv

... not just the elaborated clauses.

Fixes another regression introduced by me in rust-lang#123340, oops!
Fixes rust-lang#123340 (comment), cc `@tamird.`

An earlier local iteration of branch `rustdoc-simplify-auto-trait-impl-synth` (PR rust-lang#123340) contained a fix for issue rust-lang#111101 before I decided to limit the scope. I must've introduced this bug when manually reverting that part of the code.

r? `@GuillaumeGomez` or rustdoc

…=compiler-errors

Split `non_local_definitions` lint tests in separate test files

This PR splits the giant `non_local_definitions` lint UI test in separate test files.

This change is extracted from rust-lang#123594 (where it was requested rust-lang#123594 (comment)), to ease the review of the other PR and to reduce the size of the other PR.

r? `@compiler-errors`

…li-obk

Don't rely on upvars being assigned just because coroutine-closure kind is assigned

Previously, code relied on the implicit assumption that if a coroutine-closure's kind variable was constrained, then its upvars were also constrained. This is because we assign all of them at once at the end up upvar analysis.

However, there's another way that a coroutine-closure's kind can be constrained: from a signature hint in closure signature deduction. After rust-lang#123350, we use these hints, which means the implicit assumption above no longer holds.

This PR adds the necessary checks so that we don't ICE.

r? oli-obk

Fix typo in `Future::poll()` docs

`@rustbot` label A-docs