C341-1

C341-1 is a core bug that will be fixed in one of the next feature releases. It is listed as:

Monsters affected by stinking cloud always get angry at the hero even if the hero did not create the cloud..

The bug is actually mostly fixed in NetHack 3.4.3, with one minor exception; the bug will still occur if loading a bones file from an older game in the 3.4 series. Thus, this bug can be completely fixed accidentally by any change or patch that breaks bones file compatibility, and as such is fixed in the vast majority of NetHack variants, although it technically is not fully fixed in 3.4.3.