this fixes cycle detection for modules that need a second invocation collection pass after parsing

Refactor `into_utf8_lossy` to copy valid UTF-8 bytes into the buffer,
avoiding double validation of bytes.
Add tests that mirror the `String::from_utf8_lossy` tests

Adds the --enable-profiler flag to the RUST_CONFIGURE_ARGS for armhf distribution for Linux.  This enables running coverage for tests

verifies that the correct return instructions are emitted.

Co-authored-by: Tamme Dittrich <tamme@tweedegolf.com>

…ly only bounds for the type itself

…ally collecting implied bounds, not super bounds

… r=jackh726

add `extern "C-cmse-nonsecure-entry" fn`

tracking issue rust-lang#75835

in rust-lang#75835 (comment) it was decided that using an abi, rather than an attribute, was the right way to go for this feature.

This PR adds that ABI and removes the `#[cmse_nonsecure_entry]` attribute. All relevant tests have been updated, some are now obsolete and have been removed.

Error 0775 is no longer generated. It contains the list of targets that support the CMSE feature, and maybe we want to still use this? right now a generic "this abi is not supported on this platform" error is returned when this abi is used on an unsupported platform. On the other hand, users of this abi are likely to be experienced rust users, so maybe the generic error is good enough.

…kh726

Implement Return Type Notation (RTN)'s path form in where clauses

Implement return type notation (RTN) in path position for where clauses. We already had RTN in associated type position ([e.g.](https://play.rust-lang.org/?version=nightly&mode=debug&edition=2021&gist=627a4fb8e2cb334863fbd08ed3722c09)), but per [the RFC](https://rust-lang.github.io/rfcs/3654-return-type-notation.html#where-rtn-can-be-used-for-now):

> As a standalone type, RTN can only be used as the Self type of a where-clause [...]

Specifically, in order to enable code like:

```rust
trait Foo {
    fn bar() -> impl Sized;
}

fn is_send(_: impl Send) {}

fn test<T>()
where
    T: Foo,
    T::bar(..): Send,
{
    is_send(T::bar());
}
```

* In the resolver, when we see a `TyKind::Path` whose final segment is `GenericArgs::ParenthesizedElided` (i.e. `(..)`), resolve that path in the *value* namespace, since we're looking for a method.
* When lowering where clauses in HIR lowering, we first try to intercept an RTN self type via `lower_ty_maybe_return_type_notation`. If we find an RTN type, we lower it manually in a way that respects its higher-ranked-ness (see below) and resolves to the corresponding RPITIT. Anywhere else, we'll emit the same "return type notation not allowed in this position yet" error we do when writing RTN in every other position.
* In `resolve_bound_vars`, we add some special treatment for RTN types in where clauses. Specifically, we need to add new lifetime variables to our binders for the early- and late-bound vars we encounter on the method. This implements the higher-ranked desugaring [laid out in the RFC](https://rust-lang.github.io/rfcs/3654-return-type-notation.html#converting-to-higher-ranked-trait-bounds).

This PR also adds a bunch of tests, mostly negative ones (testing error messages).

In a follow-up PR, I'm going to mark RTN as no longer incomplete, since this PR basically finishes the impl surface that we should initially stabilize, and the RFC was accepted.

cc [RFC 3654](rust-lang/rfcs#3654) and rust-lang#109417

…nkov

rustc_expand: remember module `#[path]`s during expansion

During invocation collection, if a module item parsed from a `#[path]` attribute needed a second pass after parsing, its path wouldn't get added to the file path stack, so cycle detection broke. This checks the `#[path]` in such cases, so that it gets added appropriately. I think it should work identically to the case for external modules that don't need a second pass, but I'm not 100% sure.

Fixes rust-lang#97589

…atrieb

Avoid re-validating UTF-8 in `FromUtf8Error::into_utf8_lossy`

Part of the unstable feature `string_from_utf8_lossy_owned` - rust-lang#129436

Refactor `FromUtf8Error::into_utf8_lossy` to copy valid UTF-8 bytes into the buffer, avoiding double validation of bytes.
Add tests that mirror the `String::from_utf8_lossy` tests.

Add --enable-profiler to armhf dist

Adds the --enable-profiler flag to the RUST_CONFIGURE_ARGS for armhf distribution for Linux.  This enables running coverage for tests in builds for this target

try-job: dist-armhf-linux

…iscross

ABI compatibility: mention Result guarantee

This has been already documented in https://doc.rust-lang.org/std/result/index.html#representation, but for `Option` we mirrored those docs in the "ABI compatibility" section, so let's do the same here.

Cc `@workingjubilee` `@rust-lang/lang`

…iler-errors

Prevent Deduplication of `LongRunningWarn`

Fixes rust-lang#118612

As mention in the issue, `LongRunningWarn` is meant to be repeated multiple times.

Therefore, this PR stores a unique number in every instance of `LongRunningWarn` so that it's not hashed into the same value and omitted by the deduplication mechanism.

…e1-dead,fmease

Assert that `explicit_super_predicates_of` and `explicit_item_super_predicates` truly only contains bounds for the type itself

We distinguish _implied_ predicates (anything that is implied from elaborating a trait bound) from _super_ predicates, which are are the subset of implied predicates that share the same self type as the trait predicate we're elaborating. This was originally done in rust-lang#107614, which fixed a large class of ICEs and strange errors where the compiler expected the self type of a trait predicate not to change when elaborating super predicates.

Specifically, super predicates are special for various reasons: they're the valid candidates for trait upcasting, are the only predicates we elaborate when doing closure signature inference, etc. So making sure that we get this list correct and don't accidentally "leak" any other predicates into this list is quite important.

This PR adds some debug assertions that we're in fact not doing so, and it fixes an oversight in the effect desugaring rework.

…r=compiler-errors

compiler: Accept "improper" ctypes in extern "rust-cold" fn