From: ceriel <none@none>
Date: Fri, 1 Mar 1991 14:55:46 +0000 (+0000)
Subject: Prevent possible null-dereference
X-Git-Tag: release-5-5~1213
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=8f339de43b0f3a079274b7ccfef5f76ae8a1717c;p=ack.git

Prevent possible null-dereference
---

diff --git a/util/ego/bo/bo.c b/util/ego/bo/bo.c
index 64892c7e9..1951ac6d1 100644
--- a/util/ego/bo/bo.c
+++ b/util/ego/bo/bo.c
@@ -71,7 +71,7 @@ STATIC line_p last_code(lines,skip_pseu)
 
 	for (l = lines; l->l_next != (line_p) 0; l = l->l_next);
 	if (skip_pseu) {
-		while (INSTR(l) < sp_fmnem || INSTR(l) > sp_lmnem) l = PREV(l);
+		while (l && (INSTR(l) < sp_fmnem || INSTR(l) > sp_lmnem)) l = PREV(l);
 	}
 	return l;
 }