re PR c++/56710 (Using reserved double underscore variable name in a lambda…

re PR c++/56710 (Using reserved double underscore variable name in a lambda causes internal compiler error)

	PR c++/56710
	* semantics.c (finish_member_declaration): Don't push closure
	members.

From-SVN: r197211

gcc/cp/ChangeLog

 2013-03-28  Jason Merrill  <jason@redhat.com>
 
+	PR c++/56710
+	* semantics.c (finish_member_declaration): Don't push closure
+	members.
+
 	* name-lookup.c (pushdecl_maybe_friend_1): Use
 	nonlambda_method_basetype and current_nonlambda_class_type.
 

gcc/cp/semantics.c

@@ -2719,8 +2719,10 @@ finish_member_declaration (tree decl)
 					      /*friend_p=*/0);
 	}
     }
-  /* Enter the DECL into the scope of the class.  */
-  else if (pushdecl_class_level (decl))
+  /* Enter the DECL into the scope of the class, if the class
+     isn't a closure (whose fields are supposed to be unnamed).  */
+  else if (CLASSTYPE_LAMBDA_EXPR (current_class_type)
+	   || pushdecl_class_level (decl))
     {
       if (TREE_CODE (decl) == USING_DECL)
 	{

gcc/testsuite/g++.dg/cpp0x/lambda/lambda-names1.C

+// PR c++/56710
+// { dg-options "-std=c++11 -Wall" }
+
+int main()
+{
+    int t = 0;
+    return [&]() -> int {int __t; __t = t; return __t; }();
+    return [&t]() -> int {int __t; __t = t; return __t; }();
+}