Auto merge of rust-lang#147957 - matthiaskrgr:rollup-aqt593u, r=matthiaskrgr

Rollup of 7 pull requests

Successful merges:

 - rust-lang#141445 (Add `FromIterator` impls for `ascii::Char`s to `String`s)
 - rust-lang#142339 (Add NonNull pattern types)
 - rust-lang#147768 (Code refactoring on hir report_no_match_method_error)
 - rust-lang#147788 (const Cell methods)
 - rust-lang#147932 (Create UTF-8 version of `OsStr`/`OsString`)
 - rust-lang#147933 (os_str: Make platform docs more consistent)
 - rust-lang#147948 (PassWrapper: Access GlobalValueSummaryInfo::SummaryList via getter for LLVM 22+)

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

Author: bors

compiler/rustc_public/src/unstable/convert/stable/ty.rs

@@ -485,6 +485,7 @@ impl<'tcx> Stable<'tcx> for ty::Pattern<'tcx> {
                 end: Some(end.stable(tables, cx)),
                 include_end: true,
             },
+            ty::PatternKind::NotNull => todo!(),
             ty::PatternKind::Or(_) => todo!(),
         }
     }