diff options
Diffstat (limited to 'usr.bin/checknr/checknr.c')
| -rw-r--r-- | usr.bin/checknr/checknr.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/usr.bin/checknr/checknr.c b/usr.bin/checknr/checknr.c index 01d3216..c150b79 100644 --- a/usr.bin/checknr/checknr.c +++ b/usr.bin/checknr/checknr.c @@ -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); |
