[clang] [clang] fix infinite recursion (PR #143244)

[via cfe-commits]

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@@ -7172,7 +7172,10 @@ void Sema::CheckCompletedCXXClass(Scope *S, CXXRecordDecl *Record) {
     // "effectively constexpr" for better compatibility.
     // See https://github.com/llvm/llvm-project/issues/102293 for more info.
     if (isa<CXXDestructorDecl>(M)) {
-      auto Check = [](QualType T, auto &&Check) -> bool {
+      llvm::DenseSet<QualType> Visited;
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Sirraide wrote:

Can we use SmallDenseSet here to avoid heap allocations most of the time?

https://github.com/llvm/llvm-project/pull/143244