--- alias.c.orig	Tue Feb  2 13:32:32 1999
+++ alias.c	Tue Feb  2 13:32:47 1999
@@ -739,6 +739,9 @@
 {
 	int	i = 0;
 
+	if (!arglist)
+		return;
+
 	for (i = 0; ; i++)
 	{
 		if (!arglist->vars[i])