# Forum:What does this mean???
&lt; Forum:Watercooler

I'm in the Lawful Quest, and I just killed a basilisk as a monk (with gloves, of course)and I get a weird message:
"You kill the basilisk! dmonsfree: 1 removed doesn't match 2 pending Program in disorder-perhaps you'd better #quit."
It sounds like theres an error with my game, but considering that the Lawful quest has strange messages, I'm not sure what to make of it...

You're clearly playing SLASH'EM, since vanilla doesn't have basilisks.  That does look like a bug.  "dmonsfree" is the function that removes dead monsters from the monster list at the end of a turn.  Apparently dmonsfree thought that there were two monsters killed, but when it scanned the monster list, it found only one dead monster.
If you can read C, you can find dmonsfree at SLASH'EM 0.0.7E7F2/mon.c, line 1403.
All NetHack variants have a number of checks for inconsistent data; the function that reports a failed check is called "impossible" and reports that "Program in disorder..." message.  This doesn't always mean that your game is in danger of crashing, but you might want to savescum at such a point if you can.  Savescumming to fend off crashing games is not considered dishonorable.--Ray Chason 17:16, September 19, 2009 (UTC)