commit ee85defda48d1d6b7c18b9fab7140c6598d2f658
from: Russ Cox <rsc@swtch.com>
date: Thu Feb 05 04:13:18 2009 UTC

sed: avoid crash when rregexec return error

commit - 1adb2a07bff16932f070a29af8460c35be34fb65
commit + ee85defda48d1d6b7c18b9fab7140c6598d2f658
blob - a463e07187296ba35d54c2bca65b94f2880a37ff
blob + 5849c83fb955a0f2b4534c6904f42c8a12dd19c4
--- src/cmd/sed.c
+++ src/cmd/sed.c
@@ -994,7 +994,7 @@ match(Reprog *pattern, Rune *buf)
 		return 0;
 	subexp[0].s.rsp = buf; 
 	subexp[0].e.rep = 0;
-	if (rregexec(pattern, linebuf, subexp, MAXSUB)) {
+	if (rregexec(pattern, linebuf, subexp, MAXSUB) > 0) {
 		loc1 = subexp[0].s.rsp;
 		loc2 = subexp[0].e.rep;
 		return 1;