re PR c++/10793 (ICE (treecheck) when partial-specializing with an invalid type…

re PR c++/10793 (ICE (treecheck) when partial-specializing with an invalid type and a base class, in xref_basetypes, at cp/decl.c:12834)

	PR c++/10793
	* decl.c (xref_basetypes): Handle error_mark_node.

	* g++.dg/template/crash9.C: New test.

From-SVN: r69671

gcc/cp/ChangeLog

+2003-07-22  Kriang Lerdsuwanakij  <lerdsuwa@users.sourceforge.net>
+
+	PR c++/10793
+	* decl.c (xref_basetypes): Handle error_mark_node.
+
 2003-07-22  Nathan Sidwell  <nathan@codesourcery.com>
 
 	* cp-tree.h (enum cp_lvalue_kind): Add clk_packed.

gcc/cp/decl.c

@@ -12831,6 +12831,9 @@ xref_basetypes (tree ref, tree base_list)
   int i;
   enum tag_types tag_code;
 
+  if (ref == error_mark_node)
+    return;
+
   if (TREE_CODE (ref) == UNION_TYPE)
     {
       error ("derived union `%T' invalid", ref);

gcc/testsuite/ChangeLog

+2003-07-22  Kriang Lerdsuwanakij  <lerdsuwa@users.sourceforge.net>
+
+	PR c++/10793
+	* g++.dg/template/crash9.C: New test.
+
 2003-07-22  Volker Reichelt  <reichelt@igpm.rwth-aachen.de>
 
 	PR c++/3004

gcc/testsuite/g++.dg/parse/crash9.C

+// { dg-do compile }
+
+// Origin: Volker Reichelt <reichelt@gcc.gnu.org>
+
+// PR c++/10793: ICE in handling base class when the current class
+// contains error.
+
+template <typename> struct A {};
+template <typename> struct A<INVALID> : A<int> { }; // { dg-error "not declared|invalid" }