Auto merge of #141484 - matthiaskrgr:rollup-dc58owu, r=matthiaskrgr

Rollup of 7 pull requests

Successful merges:

 - #141405 (GetUserProfileDirectoryW is now documented to always store the size)
 - #141427 (Disable `triagebot`'s `glacier` handler)
 - #141429 (Dont walk into unsafe binders when emiting error for non-structural type match)
 - #141438 (Do not try to confirm non-dyn compatible method)
 - #141444 (Improve CONTRIBUTING.md grammar and clarity)
 - #141446 (Add 2nd Solaris target maintainer)
 - #141456 (Suggest correct `version("..")` predicate syntax in check-cfg)

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

Author: bors

src/shims/windows/env.rs

@@ -230,16 +230,16 @@ pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
         interp_ok(match directories::UserDirs::new() {
             Some(dirs) => {
                 let home = dirs.home_dir();
-                let size_avail = if this.ptr_is_null(size.ptr())? {
+                let size_avail = if this.ptr_is_null(buf)? {
                     0 // if the buf pointer is null, we can't write to it; `size` will be updated to the required length
                 } else {
                     this.read_scalar(&size)?.to_u32()?
                 };
                 // Of course we cannot use `windows_check_buffer_size` here since this uses
                 // a different method for dealing with a too-small buffer than the other functions...
                 let (success, len) = this.write_path_to_wide_str(home, buf, size_avail.into())?;
-                // The Windows docs just say that this is written on failure, but std relies on it
-                // always being written. Also see <https://github.com/rust-lang/rust/issues/141254>.
+                // As per <https://github.com/MicrosoftDocs/sdk-api/pull/1810>, the size is always
+                // written, not just on failure.
                 this.write_scalar(Scalar::from_u32(len.try_into().unwrap()), &size)?;
                 if success {
                     Scalar::from_i32(1) // return TRUE