1 files changed, 6 insertions, 0 deletions
diff --git a/lib/Sema/SemaTemplate.cpp b/lib/Sema/SemaTemplate.cpp
index ce0132ee81..6384e53e80 100644
--- a/lib/Sema/SemaTemplate.cpp
+++ b/lib/Sema/SemaTemplate.cpp
@@ -4126,6 +4126,12 @@ Sema::ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec,
   TemplateArgs.setRAngleLoc(RAngleLoc);
   translateTemplateArguments(TemplateArgsIn, TemplateArgs);
 
+  // Check for unexpanded parameter packs in any of the template arguments.
+  for (unsigned I = 0, N = TemplateArgs.size(); I != N; ++I)
+    if (DiagnoseUnexpandedParameterPack(TemplateArgs[I], 
+                                        UPPC_PartialSpecialization))
+      return true;
+  
   // Check that the template argument list is well-formed for this
   // template.
   llvm::SmallVector<TemplateArgument, 4> Converted;