From 477084b940a43a7f5bdb411e422a736c1f356c6f Mon Sep 17 00:00:00 2001
From: jason <jason@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Fri, 20 May 2011 19:02:08 +0000
Subject: [PATCH] 	PR c++/48736
 	* pt.c (tsubst_copy_and_build): Handle substitution of a pack
 	expansion producing another expansion.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_6-branch@173971 138bc75d-0d04-0410-961f-82ee72b054a4

index e1ddf84..d49fe6b 100644
--- a/gcc/cp/pt.c
+++ b/gcc/cp/pt.c
@@ -13221,7 +13221,8 @@ tsubst_copy_and_build (tree t,
                 ce->value = tsubst_pack_expansion (ce->value, args, complain,
                                                   in_decl);
 
-		if (ce->value == error_mark_node)
+		if (ce->value == error_mark_node
+		    || PACK_EXPANSION_P (ce->value))
 		  ;
 		else if (TREE_VEC_LENGTH (ce->value) == 1)
                   /* Just move the argument into place.  */
new file mode 100644
index 0000000..3ad5af4
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/variadic108.C
@@ -0,0 +1,10 @@
+// PR c++/48736
+// { dg-options -std=c++0x }
+
+template<class T>
+T&& create();
+
+template<class T, class... Args,
+ class = decltype(T{create<Args>()...}) // Line X
+>
+char f(int);
-- 
1.7.0.4