Index: clang/lib/Sema/SemaTemplate.cpp
===================================================================
--- clang/lib/Sema/SemaTemplate.cpp
+++ clang/lib/Sema/SemaTemplate.cpp
@@ -718,9 +718,15 @@
                                 SourceLocation TemplateKWLoc,
                                 const DeclarationNameInfo &NameInfo,
                                 const TemplateArgumentListInfo *TemplateArgs) {
-  return DependentScopeDeclRefExpr::Create(
-      Context, SS.getWithLocInContext(Context), TemplateKWLoc, NameInfo,
-      TemplateArgs);
+  // DependentScopeDeclRefExpr::Create requires a valid QualifierLoc
+  // See https://bugs.llvm.org/show_bug.cgi?id=35682
+  NestedNameSpecifierLoc QualifierLoc = SS.getWithLocInContext(Context);
+  if (!QualifierLoc)
+    return ExprError();
+  else
+    return DependentScopeDeclRefExpr::Create(Context, std::move(QualifierLoc),
+                                             TemplateKWLoc, NameInfo,
+                                             TemplateArgs);
 }