pt.c (argument_pack_element_is_expansion_p): A decl pack is an expansion.

	* pt.c (argument_pack_element_is_expansion_p): A decl pack is an
	expansion.

From-SVN: r225494

gcc/cp/ChangeLog

+2015-07-06  Jason Merrill  <jason@redhat.com>
+
+	* pt.c (argument_pack_element_is_expansion_p): A decl pack is an
+	expansion.
+
 2015-07-02  Jason Merrill  <jason@redhat.com>
 
 	PR c++/66743

gcc/cp/pt.c

@@ -9838,6 +9838,9 @@ argument_pack_element_is_expansion_p (tree arg_pack, int i)
   if (i >= TREE_VEC_LENGTH (vec))
     return 0;
   tree elt = TREE_VEC_ELT (vec, i);
+  if (DECL_P (elt))
+    /* A decl pack is itself an expansion.  */
+    elt = TREE_TYPE (elt);
   if (!PACK_EXPANSION_P (elt))
     return 0;
   if (PACK_EXPANSION_EXTRA_ARGS (elt))