From a0893a20e50af2deb56e6cfee0b455e310a5805a Mon Sep 17 00:00:00 2001
From: "Eric S. Raymond" <esr@thyrsus.com>
Date: Thu, 26 Mar 1998 21:25:51 +0000
Subject: Prevent pathological circular lists.

svn path=/trunk/; revision=1730
---
 uid.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'uid.c')

diff --git a/uid.c b/uid.c
index 8e51bb32..93fabcbd 100644
--- a/uid.c
+++ b/uid.c
@@ -277,7 +277,7 @@ int delete_str(struct idlist **idl, int num)
 void append_str_list(struct idlist **idl, struct idlist **nidl)
 /* append nidl to idl (does not copy *) */
 {
-    if ((*nidl) == (struct idlist *)NULL)
+    if ((*nidl) == (struct idlist *)NULL || *nidl == *idl)
 	return;
     else if ((*idl) == (struct idlist *)NULL)
 	*idl = *nidl;
-- 
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