From f4e84e1c8443edee24be10cea492892f3621933a Mon Sep 17 00:00:00 2001
From: jason <jason@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon, 6 Jun 2011 20:07:26 +0000
Subject: [PATCH] 	PR c++/49298
 	* semantics.c (potential_constant_expression_1): Handle FIELD_DECL.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_6-branch@174722 138bc75d-0d04-0410-961f-82ee72b054a4

index d56423e..5cb8f49 100644
--- a/gcc/cp/semantics.c
+++ b/gcc/cp/semantics.c
@@ -7429,6 +7429,8 @@ potential_constant_expression_1 (tree t, bool want_rval, tsubst_flags_t flags)
     case TEMPLATE_PARM_INDEX:
     case TRAIT_EXPR:
     case IDENTIFIER_NODE:
+      /* We can see a FIELD_DECL in a pointer-to-member expression.  */
+    case FIELD_DECL:
       return true;
 
     case PARM_DECL:
new file mode 100644
index 0000000..873000b
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/regress/ptrmem1.C
@@ -0,0 +1,9 @@
+// PR c++/49298
+// { dg-options -std=c++0x }
+
+template <class T, int T::*> struct B { };
+template <class T> struct A
+{
+  int i;
+  B<A,&A::i> b;
+};
-- 
1.7.0.4