re PR other/5746 (0220 cvs crashes using undeclared type)

	PR other/5746
	* semantics.c (finish_switch_cond): Don't call get_unwidened
	if error_mark_node.

From-SVN: r49969

gcc/cp/ChangeLog

+2002-02-22  Jakub Jelinek  <jakub@redhat.com>
+
+	PR other/5746
+	* semantics.c (finish_switch_cond): Don't call get_unwidened
+	if error_mark_node.
+
 2002-02-22  Nathan Sidwell  <nathan@codesourcery.com>
 
 	PR c++/2645, DR 295

gcc/cp/semantics.c

@@ -516,7 +516,6 @@ finish_switch_cond (cond, switch_stmt)
   tree orig_type = NULL;
   if (!processing_template_decl)
     {
-      tree type;
       tree index;
 
       /* Convert the condition to an integer or enumeration type.  */
@@ -533,15 +532,17 @@ finish_switch_cond (cond, switch_stmt)
 	  cond = fold (build1 (CLEANUP_POINT_EXPR, TREE_TYPE (cond), cond));
 	}
 
-      type = TREE_TYPE (cond);
-      index = get_unwidened (cond, NULL_TREE);
-      /* We can't strip a conversion from a signed type to an unsigned,
-	 because if we did, int_fits_type_p would do the wrong thing
-	 when checking case values for being in range,
-	 and it's too hard to do the right thing.  */
-      if (TREE_UNSIGNED (TREE_TYPE (cond))
-	  == TREE_UNSIGNED (TREE_TYPE (index)))
-	cond = index;
+      if (cond != error_mark_node)
+	{
+	  index = get_unwidened (cond, NULL_TREE);
+	  /* We can't strip a conversion from a signed type to an unsigned,
+	     because if we did, int_fits_type_p would do the wrong thing
+	     when checking case values for being in range,
+	     and it's too hard to do the right thing.  */
+	  if (TREE_UNSIGNED (TREE_TYPE (cond))
+	      == TREE_UNSIGNED (TREE_TYPE (index)))
+	    cond = index;
+	}
     }
   FINISH_COND (cond, switch_stmt, SWITCH_COND (switch_stmt));
   SWITCH_TYPE (switch_stmt) = orig_type;