This checks that:

* the handle is a pipe
* the pipe's file name starts with "msys-" or "cygwin-" rather than looking in the full path.

The latest version of `rental` (v0.5.6) contains a fix that allows it to
compile without relying on the pretty-print back-compat hack.

Hopefully, there are no longer any crates relying on the affected
versions of the (much less popular) `procedural-masquerade` crate. This
should allow us to target the pretty-print back-compat hack specifically
to older versions of `rental`, and specifically mention upgrading to
`rental` v0.5.6 in the lint message.

Only apply `ProceduralMasquerade` hack to older versions of `rental`

The latest version of `rental` (v0.5.6) contains a fix that allows it to
compile without relying on the pretty-print back-compat hack.

Hopefully, there are no longer any crates relying on the affected
versions of the (much less popular) `procedural-masquerade` crate. This
should allow us to target the pretty-print back-compat hack specifically
to older versions of `rental`, and specifically mention upgrading to
`rental` v0.5.6 in the lint message.

Slightly tweak comments wrt `lint_overflowing_range_endpoint`

From the review: rust-lang#101986 (comment)

It _seemed_ that the lint was not emitted when the `if` check failed, but _actually_ this happens already in a special case and the lint is emitted outside of this function, if this function doesn't. I've cleared up the code/comments a bit, so it's more obvious :)

r? `@estebank`

Remove misc_cast and validate types when casting

Continuing our work in rust-lang#102675

r? `@oli-obk`

…oss-crate-gat-params, r=GuillaumeGomez

rustdoc: render bounds of cross-crate GAT params

Follow-up to rust-lang#102439.
Render the trait bounds of type parameters of cross-crate (generic) associated types.

```@rustbot``` label T-rustdoc A-cross-crate-reexports
r? ```@GuillaumeGomez```

…htriplett

(rust-lang#102929) Implement `String::leak` (attempt 2)

Implementation of `String::leak` (rust-lang#102929)

ACP: rust-lang/libs-team#109

Supersedes rust-lang#102941 (see previous reviews there)

`@rustbot` label +T-libs-api -T-libs

…homcc

Add a forgotten check for NonNull::new_unchecked's precondition

Looks like I forgot this function a while ago in rust-lang#92686

r? `@thomcc`

Reduce false positives in msys2 detection

Currently msys2 will be detected by getting the file path and looking to see if it contains the substrings "msys-" and "-ptr" (or "cygwin-" and "-pty"). This risks false positives, especially with filesystem files and if `GetFileInformationByHandleEx` returns a [full path](https://learn.microsoft.com/en-us/windows-hardware/drivers/ddi/ntifs/nf-ntifs-ntqueryinformationfile#remarks).

This PR adds a check to see if the handle is a pipe before doing the substring search. Additionally, for "msys2-" or "cygwin-" it only checks if the file name starts with the substring rather than looking at the whole path.