re PR c++/50742 (tree check fail in check_previous_goto_1)

	PR c++/50742
	* decl.c (check_previous_goto_1): Handle using-decl.

From-SVN: r180160

gcc/cp/ChangeLog

 2011-10-18  Jason Merrill  <jason@redhat.com>
 
+	PR c++/50742
+	* decl.c (check_previous_goto_1): Handle using-decl.
+
+2011-10-18  Jason Merrill  <jason@redhat.com>
+
 	PR c++/50500
 	DR 1082
 	* class.c (type_has_user_declared_move_constructor): New.

gcc/cp/decl.c

@@ -2683,7 +2683,8 @@ check_previous_goto_1 (tree decl, cp_binding_level* level, tree names,
       tree new_decls, old_decls = (b == level ? names : NULL_TREE);
 
       for (new_decls = b->names; new_decls != old_decls;
-	   new_decls = DECL_CHAIN (new_decls))
+	   new_decls = (DECL_P (new_decls) ? DECL_CHAIN (new_decls)
+			: TREE_CHAIN (new_decls)))
 	{
 	  int problem = decl_jump_unsafe (new_decls);
 	  if (! problem)

gcc/testsuite/ChangeLog

 2011-10-18  Jason Merrill  <jason@redhat.com>
 
+	PR c++/50742
+	* g++.dg/lookup/using23.C: New.
+
 	PR c++/50500
 	* g++.dg/cpp0x/implicit12.C: New.
 	* g++.dg/cpp0x/defaulted20.C: Adjust.

gcc/testsuite/g++.dg/lookup/using23.C

+// PR c++/50742
+
+typedef int A;
+
+void f(int i)
+{
+  switch (i)
+    {
+    case 0:
+      using ::A;
+    default:;
+    }
+}