$NetBSD: patch-ae,v 1.1 2008/11/05 12:29:04 wiz Exp $

--- cdb.C.orig	2008-10-11 14:57:21.000000000 +0000
+++ cdb.C
@@ -394,6 +394,9 @@ void close_region ()
 
 lookup_t *Lookup (Symbol s, bool tagged, RegionPtr r)
 {
+	if (s == -1)
+		return NULL;
+
 	lookup_t *t = lookup_table [s - SYMBASE];
 
 	if (tagged) for (; t; t = t->next) {
@@ -1175,6 +1178,7 @@ void aeqn::prstruct (RegionPtr p)
 		txt [txti++] = UNI;
 	for (m = regions [p].first; m; m=m->next) {
 		L = Lookup (m->s, false, p);
+		if (!L) continue;
 		txt [txti++] = m->s;
 		base = base_of (L->info.tdf);
 		spec = spec_of (L->info.tdf);