$OpenBSD: patch-dfasyn_compdfa_c,v 1.1 2009/04/24 14:43:16 kurt Exp $
--- dfasyn/compdfa.c.orig	Sun Apr 19 09:57:26 2009
+++ dfasyn/compdfa.c	Sun Apr 19 09:56:53 2009
@@ -425,7 +425,7 @@ do_next_dfa_state:
 
     for (j=0; j<ntokens; j++) {
       int next_state = dfas[i]->map[j];
-      if (leads_to_result[next_state] == 0) {
+      if ((next_state >= 0) && leads_to_result[next_state] == 0) {
         dfas[i]->map[j] = -1;
       }
     }