From: Ken Thompson <ken@golang.org>
Date: Fri, 13 Aug 2010 21:30:18 +0000 (-0700)
Subject: fix bounds check in error recovery
X-Git-Tag: weekly.2010-08-25~59
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=3efb4c3b6344ea88dbfd3a596d35760da9254b54;p=gostls13.git

fix bounds check in error recovery
(thanks to avp@mit.edu)

R=rsc
CC=golang-dev
https://golang.org/cl/1998041
---

diff --git a/src/cmd/goyacc/goyacc.go b/src/cmd/goyacc/goyacc.go
index b364d5189b..45dced1b3e 100644
--- a/src/cmd/goyacc/goyacc.go
+++ b/src/cmd/goyacc/goyacc.go
@@ -3244,7 +3244,7 @@ yydefault:
 			Errflag = 3
 
 			/* find a state where "error" is a legal shift action */
-			for yyp >= len(YYS) {
+			for yyp >= 0 {
 				yyn = yyPact[YYS[yyp].yys] + yyErrCode
 				if yyn >= 0 && yyn < yyLast {
 					yystate = yyAct[yyn] /* simulate a shift of "error" */