[PATCH] D136259: Fix crash in constraining partial specialization on nested template.

[Utkarsh Saxena via Phabricator via cfe-commits]

usaxena95 created this revision.
Herald added a project: All.
usaxena95 requested review of this revision.
Herald added a project: clang.
Herald added a subscriber: cfe-commits.

Fixes: https://github.com/llvm/llvm-project/issues/53354


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D136259

Files:
  clang/lib/Sema/SemaTemplateDeduction.cpp


Index: clang/lib/Sema/SemaTemplateDeduction.cpp
===================================================================
--- clang/lib/Sema/SemaTemplateDeduction.cpp
+++ clang/lib/Sema/SemaTemplateDeduction.cpp
@@ -5804,10 +5804,10 @@
   }
 
   bool TraverseTemplateName(TemplateName Template) {
-    if (auto *TTP =
-            dyn_cast<TemplateTemplateParmDecl>(Template.getAsTemplateDecl()))
-      if (TTP->getDepth() == Depth)
-        Used[TTP->getIndex()] = true;
+    if (TemplateDecl *TD = Template.getAsTemplateDecl())
+      if (auto *TTP = dyn_cast<TemplateTemplateParmDecl>(TD))
+        if (TTP->getDepth() == Depth)
+          Used[TTP->getIndex()] = true;
     RecursiveASTVisitor<MarkUsedTemplateParameterVisitor>::
         TraverseTemplateName(Template);
     return true;


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