diff options
Diffstat (limited to 'src/cmd')
| -rw-r--r-- | src/cmd/troff/n4.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/cmd/troff/n4.c b/src/cmd/troff/n4.c index 08e06ad3..f555d89f 100644 --- a/src/cmd/troff/n4.c +++ b/src/cmd/troff/n4.c @@ -453,7 +453,12 @@ a0: i = ckph(); if (nonumb) break; - acc %= i; + if (i == 0) { + flusho(); + ERROR "modulus by zero." WARN; + acc = 0; + } else + acc %= i; goto a0; case '&': /*and*/ i = ckph(); |