[flang] [libcxx] [clang] [compiler-rt] [clang-tools-extra] [llvm] [Clang][Sema] Fix qualifier restriction of overriden methods (PR #71696)

[Shafik Yaghmour via cfe-commits]

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@@ -18469,9 +18469,22 @@ bool Sema::CheckOverridingFunctionReturnType(const 
CXXMethodDecl *New,
 
 
   // The new class type must have the same or less qualifiers as the old type.
-  if (NewClassTy.isMoreQualifiedThan(OldClassTy)) {
+  if (!OldClassTy.isAtLeastAsQualifiedAs(NewClassTy)) {
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shafik wrote:

and also add a release note.

https://github.com/llvm/llvm-project/pull/71696
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