[clang] Bugfix for chosing the correct deduction guide (PR #66487)

[via cfe-commits]

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@@ -2129,7 +2129,7 @@ Decl *TemplateDeclInstantiator::VisitFunctionDecl(
     Function = CXXDeductionGuideDecl::Create(
         SemaRef.Context, DC, D->getInnerLocStart(),
         InstantiatedExplicitSpecifier, NameInfo, T, TInfo,
-        D->getSourceRange().getEnd(), /*Ctor=*/nullptr,
+        D->getSourceRange().getEnd(), DGuide->getCorrespondingConstructor(),
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HoBoIs wrote:

I'm a new developer, can someone with more experience in clang check if this can never cause a use after free.

https://github.com/llvm/llvm-project/pull/66487