1 files changed, 2 insertions, 0 deletions
diff --git a/lib/Sema/SemaTemplateInstantiateDecl.cpp b/lib/Sema/SemaTemplateInstantiateDecl.cpp
index c29ff865b2..50b24dc41d 100644
--- a/lib/Sema/SemaTemplateInstantiateDecl.cpp
+++ b/lib/Sema/SemaTemplateInstantiateDecl.cpp
@@ -1894,6 +1894,8 @@ TemplateDeclInstantiator::SubstFunctionType(FunctionDecl *D,
         // Parameter pack: make the instantiation an argument pack.
         SemaRef.CurrentInstantiationScope->MakeInstantiatedLocalArgPack(
                                                                       OldParam);
+        // FIXME: Variadic templates. Figure out how many arguments are in the
+        // expansion of OldParam, so we don't gobble all of the arguments here.
         while (NewIdx < NumNewParams) {
           ParmVarDecl *NewParam = NewProtoLoc->getArg(NewIdx++);
           Params.push_back(NewParam);