Author: bapt
Date: Tue May 5 09:29:32 2015
New Revision: 282464
URL: https://svnweb.freebsd.org/changeset/base/282464
Log:
Ensure we read existing values of the stk table
Obtained from: NetBSD
Modified:
head/usr.bin/checknr/checknr.c
Modified: head/usr.bin/checknr/checknr.c
==============================================================================
--- head/usr.bin/checknr/checknr.c Tue May 5 09:26:32 2015
(r282463)
+++ head/usr.bin/checknr/checknr.c Tue May 5 09:29:32 2015
(r282464)
@@ -341,7 +341,8 @@ 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);
@@ -356,7 +357,8 @@ process(FILE *f)
} else if (!fflag && line[i] == 'f') {
n = line[++i];
if (n == 'P') {
- if (stk[stktop].opno == FT) {
+ if (stktop >= 0 &&
+ stk[stktop].opno == FT) {
stktop--;
} else {
pe(lineno);
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