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Coverity CID 1204: Prevent negative index.

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This commit is contained in:
christos 2006-04-02 03:29:17 +00:00
parent e9427c25f6
commit 095e4da292
1 changed files with 4 additions and 3 deletions
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7
usr.bin/checknr/checknr.c
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@ -1,4 +1,4 @@
/* $NetBSD: checknr.c,v 1.17 2005/03/30 18:01:32 xtraeme Exp $ */
/* $NetBSD: checknr.c,v 1.18 2006/04/02 03:29:17 christos Exp $ */
/*
* Copyright (c) 1980, 1993
@ -39,7 +39,7 @@ __COPYRIGHT("@(#) Copyright (c) 1980, 1993\n\
#if 0
static char sccsid[] = "@(#)checknr.c 8.1 (Berkeley) 6/6/93";
#else
__RCSID("$NetBSD: checknr.c,v 1.17 2005/03/30 18:01:32 xtraeme Exp $");
__RCSID("$NetBSD: checknr.c,v 1.18 2006/04/02 03:29:17 christos Exp $");
#endif
#endif /* not lint */
@ -365,7 +365,8 @@ process(FILE *f)
n = 10 * n + line[i] - '0';
i--;
if (n == 0) {
if (stk[stktop].opno == SZ) {
if (stktop >= 0 &&
stk[stktop].opno == SZ) {
stktop--;
} else {
pe(lineno);