re PR c++/58600 ([c++11] ICE on wrong usage of alignas)

/cp
2014-04-11  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/58600
	* name-lookup.c (parse_using_directive): Return early if the
	attribs argument is error_mark_node; use get_attribute_name.

/testsuite
2014-04-11  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/58600
	* g++.dg/cpp0x/gen-attrs-58.C: New.
	* g++.dg/cpp0x/gen-attrs-59.C: Likewise.

From-SVN: r209310

gcc/cp/ChangeLog

+2014-04-11  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/58600
+	* name-lookup.c (parse_using_directive): Return early if the
+	attribs argument is error_mark_node; use get_attribute_name.
+
 2014-04-11  Jason Merrill  <jason@redhat.com>
 
 	DR 1030

gcc/cp/name-lookup.c

@@ -4019,13 +4019,14 @@ do_using_directive (tree name_space)
 void
 parse_using_directive (tree name_space, tree attribs)
 {
-  tree a;
-
   do_using_directive (name_space);
 
-  for (a = attribs; a; a = TREE_CHAIN (a))
+  if (attribs == error_mark_node)
+    return;
+
+  for (tree a = attribs; a; a = TREE_CHAIN (a))
     {
-      tree name = TREE_PURPOSE (a);
+      tree name = get_attribute_name (a);
       if (is_attribute_p ("strong", name))
 	{
 	  if (!toplevel_bindings_p ())

gcc/testsuite/ChangeLog

+2014-04-11  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/58600
+	* g++.dg/cpp0x/gen-attrs-58.C: New.
+	* g++.dg/cpp0x/gen-attrs-59.C: Likewise.
+
 2014-04-11  Steve Ellcey  <sellcey@mips.com>
 	    Jakub Jelinek  <jakub@redhat.com>
 

gcc/testsuite/g++.dg/cpp0x/gen-attrs-58.C

+// PR c++/58600
+// { dg-do compile { target c++11 } }
+
+namespace N { int i; }
+using namespace N alignas(int); // { dg-warning "ignored" }

gcc/testsuite/g++.dg/cpp0x/gen-attrs-59.C

+// PR c++/58600
+// { dg-do compile { target c++11 } }
+
+namespace N {}
+using namespace N alignas(X); // { dg-error "declared" }