Unrolled build for rust-lang#127625

Rollup merge of rust-lang#127625 - SkiFire13:revert-comment-deletion, r=workingjubilee

Revert accidental comment deletion

This reverts an accidental comment deletion made in rust-lang#113128

See also rust-lang#113128 (comment)

Author: rust-timer

compiler/rustc_borrowck/src/lib.rs

@@ -821,6 +821,8 @@ impl<'a, 'mir, 'tcx, R> rustc_mir_dataflow::ResultsVisitor<'mir, 'tcx, R>
             | TerminatorKind::Return
             | TerminatorKind::TailCall { .. }
             | TerminatorKind::CoroutineDrop => {
+                // Returning from the function implicitly kills storage for all locals and statics.
+                // Often, the storage will already have been killed by an explicit
                 // StorageDead, but we don't always emit those (notably on unwind paths),
                 // so this "extra check" serves as a kind of backup.
                 let borrow_set = self.borrow_set.clone();