--- siag/railway.c.orig	Sun Jun  6 10:30:40 1999
+++ siag/railway.c	Tue Jun 22 13:59:53 1999
@@ -375,7 +375,7 @@
 void ref_expander(buffer *buf, char *src, char *dest,
 		char *brk, char *tmpl, char *rng)
 {
-	int a1_refs = buf->a1_refs;
+	int a1_refs = buf ? buf->a1_refs : 0;
 	ref_state state = REF_START;
 	char *exp;
 	char *start, *end;