re PR c++/65558 (crash using __attribute__((__abi_tag__)) on anonymous inline namespace)

	PR c++/65558
	* name-lookup.c (handle_namespace_attrs): Ignore abi_tag attribute
	on an anonymous namespace.

	* g++.dg/cpp0x/pr65558.C: New test.

From-SVN: r221672

gcc/cp/ChangeLog

 2015-03-25  Marek Polacek  <polacek@redhat.com>
 
+	PR c++/65558
+	* name-lookup.c (handle_namespace_attrs): Ignore abi_tag attribute
+	on an anonymous namespace.
+
+2015-03-25  Marek Polacek  <polacek@redhat.com>
+
 	PR c++/61670
 	* class.c (remove_zero_width_bit_fields): Check for null DECL_SIZE.
 

gcc/cp/name-lookup.c

@@ -3663,6 +3663,12 @@ handle_namespace_attrs (tree ns, tree attributes)
 		       "namespace", name);
 	      continue;
 	    }
+	  if (!DECL_NAME (ns))
+	    {
+	      warning (OPT_Wattributes, "ignoring %qD attribute on anonymous "
+		       "namespace", name);
+	      continue;
+	    }
 	  if (!args)
 	    {
 	      tree dn = DECL_NAME (ns);

gcc/testsuite/ChangeLog

 2015-03-25  Marek Polacek  <polacek@redhat.com>
 
+	PR c++/65558
+	* g++.dg/cpp0x/pr65558.C: New test.
+
+2015-03-25  Marek Polacek  <polacek@redhat.com>
+
 	PR c++/61670
 	* g++.dg/template/pr61670.C: New test.
 

gcc/testsuite/g++.dg/cpp0x/pr65558.C

+// PR c++/65558
+// { dg-do compile { target c++11 } }
+
+inline namespace __attribute__((__abi_tag__))
+{ // { dg-warning "ignoring .__abi_tag__. attribute on anonymous namespace" }
+}