re PR c++/50864 (ICE with decltype and "declval" from another namespace)

/cp
2011-11-08  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/50864
	* parser.c (cp_parser_postfix_dot_deref_expression): Reject invalid
	uses of '->' and '.' as postfix-expression in namespace scope.

/testsuite
2011-11-08  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/50864
	* g++.dg/parse/template26.C: New.
	* g++.dg/template/crash45.C: Adjust dg-error string.

From-SVN: r181151

gcc/cp/ChangeLog

+2011-11-08  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/50864
+	* parser.c (cp_parser_postfix_dot_deref_expression): Reject invalid
+	uses of '->' and '.' as postfix-expression in namespace scope.
+
 2011-11-07  Jason Merrill  <jason@redhat.com>
 
 	PR c++/50848

gcc/cp/parser.c

@@ -5969,6 +5969,13 @@ cp_parser_postfix_dot_deref_expression (cp_parser *parser,
 	{
 	  if (name != error_mark_node && !BASELINK_P (name) && parser->scope)
 	    {
+	      if (TREE_CODE (parser->scope) == NAMESPACE_DECL)
+		{
+		  error_at (token->location, "%<%D::%D%> is not a class member",
+			    parser->scope, name);
+		  postfix_expression = error_mark_node;
+		}
+	      else
 		name = build_qualified_name (/*type=*/NULL_TREE,
 					     parser->scope,
 					     name,

gcc/testsuite/ChangeLog

+2011-11-08  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/50864
+	* g++.dg/parse/template26.C: New.
+	* g++.dg/template/crash45.C: Adjust dg-error string.
+
 2011-11-07  Jason Merrill  <jason@redhat.com>
 
 	PR c++/50848

gcc/testsuite/g++.dg/parse/template26.C

+// PR c++/50864
+
+namespace impl
+{
+  template <class T> T create();
+}
+
+template <class T, class U, __SIZE_TYPE__
+	  = sizeof(impl::create<T>()->*impl::create<U>())>
+struct foo1;
+
+template <class T, class U, __SIZE_TYPE__
+	  = sizeof(impl::create<T>()->impl::create<U>())> // { dg-error "not a class member" }
+struct foo2;
+
+template <class T, class U, __SIZE_TYPE__
+	  = sizeof(impl::create<T>().impl::create<U>())> // { dg-error "not a class member" }
+struct foo3;

gcc/testsuite/g++.dg/template/crash45.C

@@ -9,5 +9,5 @@ namespace N
 
 void bar(A *p)
 {
-  p->N::foo<0>; // { dg-error "not a member" } 
+  p->N::foo<0>; // { dg-error "not a class member" }
 }