parse.y (check_inner_circular_reference): Ignore incomplete types.

2002-03-29  Tom Tromey  <tromey@redhat.com>

	* parse.y (check_inner_circular_reference): Ignore incomplete
	types.

(http://gcc.gnu.org/ml/gcc-patches/2002-03/msg01987.html)

From-SVN: r51573

gcc/java/ChangeLog

+2002-03-29  Tom Tromey  <tromey@redhat.com>
+
+	* parse.y (check_inner_circular_reference): Ignore incomplete
+	types.
+
 2002-03-29  Neil Booth  <neil@daikokuya.demon.co.uk>
 
 	* Make-lang.in (builtins.o): Update.

gcc/java/parse.y

@@ -5245,14 +5245,23 @@ check_inner_circular_reference (source, target)
 
   if (!basetype_vec)
     return NULL_TREE;
-  
+
   for (i = 0; i < TREE_VEC_LENGTH (basetype_vec); i++)
     {
-      tree su = BINFO_TYPE (TREE_VEC_ELT (basetype_vec, i));
+      tree su;
+
+      /* We can end up with a NULL_TREE or an incomplete type here if
+	 we encountered previous type resolution errors. It's safe to
+	 simply ignore these cases.  */
+      if (TREE_VEC_ELT (basetype_vec, i) == NULL_TREE)
+	continue;
+      su = BINFO_TYPE (TREE_VEC_ELT (basetype_vec, i));
+      if (INCOMPLETE_TYPE_P (su))
+	continue;
 
       if (inherits_from_p (su, target))
 	return lookup_cl (TYPE_NAME (su));
-      
+
       for (ctx = DECL_CONTEXT (TYPE_NAME (su)); ctx; ctx = DECL_CONTEXT (ctx))
 	{
 	  /* An enclosing context shouldn't be TARGET */