[clang] [clang] member pointer class qualification fix (PR #142081)

[Matheus Izvekov via cfe-commits]

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@@ -2127,7 +2127,7 @@ static TemplateDeductionResult DeduceTemplateArgumentsByTypeMatch(
         TA = S.Context.getTypeDeclType(MPA->getMostRecentCXXRecordDecl());
       } else {
         NestedNameSpecifier *QA = MPA->getQualifier();
-        TA = QualType(QA->translateToType(S.Context), 0);
+        TA = QualType(QA->translateToType(S.Context), 0).getUnqualifiedType();
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mizvekov wrote:

Yes, getUnqualifiedType will remove the least amount of top-level sugar which will get the type unqualified.

Unfortunately we don't have yet in clang a good representation for qualification adjustments.
The existing nodes like AdjustedType would be too costly to use consistently for this very common kind of adjustment.

https://github.com/llvm/llvm-project/pull/142081