From: Jim Meyering <jim@meyering.net>
Date: Sun, 22 Aug 1999 16:10:24 +0000 (+0000)
Subject: (detect_loop): There's no loop if k->top is NULL.
X-Git-Tag: FILEUTILS-4_0j-trial~287
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=53e173cca675e35beda54a96641441b33c8cd0b9;p=thirdparty%2Fcoreutils.git

(detect_loop): There's no loop if k->top is NULL.
---

diff --git a/src/tsort.c b/src/tsort.c
index 0b36a33683..f26cfa3950 100644
--- a/src/tsort.c
+++ b/src/tsort.c
@@ -315,7 +315,7 @@ scan_zeros (struct item *k)
 static void
 detect_loop (struct item *k)
 {
-  if (k->count > 0)
+  if (k->count > 0 && k->top)
     {
       while (k && k->count > 0)
 	{