[clang] [clang] fix P3310 overload resolution flag propagation (PR #125372)

[via cfe-commits]

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@@ -2525,8 +2525,11 @@ void TextNodeDumper::VisitCXXRecordDecl(const CXXRecordDecl *D) {
     OS << " instantiated_from";
     dumpPointer(Instance);
   }
-  if (const auto *CTSD = dyn_cast<ClassTemplateSpecializationDecl>(D))
+  if (const auto *CTSD = dyn_cast<ClassTemplateSpecializationDecl>(D)) {
     dumpTemplateSpecializationKind(CTSD->getSpecializationKind());
+    if (CTSD->hasMatchedPackOnParmToNonPackOnArg())
+      OS << " strict_match";
+  }
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cor3ntin wrote:

I don't know if that's useful information in the ast dump - is that just for testing? I'd be inclined to removing it, the ast dump doesn't tell you _how_ it was formed

https://github.com/llvm/llvm-project/pull/125372