What's wonderful about this bug is that giving the troll to itself to eat gets rid of the troll, but doesn't clear the TROLL-FLAG. ;( So then when you try to exit the room to the NORTH, EAST or SOUTH, you get TCHOMPed, and the non-existent troll fends you off with a menacing gesture! ;) So you are truly fucked, and can't finish the game.
>EAST
The troll fends you off with a menacing gesture.
#ROOM {"MTROL"
"You are in a small room with passages off in all directions.
Bloodstains and deep scratches (perhaps made by an axe) mar the
walls."
"The Troll Room"
%<> #EXIT {"WEST" "CELLA"
"EAST" #CEXIT {"TROLL-FLAG" "CRAW4" %,TCHOMP}
"NORTH" #CEXIT {"TROLL-FLAG" "PASS1" %,TCHOMP}
"SOUTH" #CEXIT {"TROLL-FLAG" "MAZE1" %,TCHOMP}}
(#FIND-OBJ {"TROLL"})}
<PSETG TCHOMP "The troll fends you off with a menacing gesture.">
"You are likely to be eaten by a Grue.
If this predicament seems particularly cruel,
consider whose fault it might be;
not a torch or a match in your inventory."
https://youtu.be/4nigRT2KmCE
Having the troll eat itself wouldn't remove the light source. The troll didn't have a light to begin with, it can see in the dark.
What's wonderful about this bug is that giving the troll to itself to eat gets rid of the troll, but doesn't clear the TROLL-FLAG. ;( So then when you try to exit the room to the NORTH, EAST or SOUTH, you get TCHOMPed, and the non-existent troll fends you off with a menacing gesture! ;) So you are truly fucked, and can't finish the game.
>EAST
The troll fends you off with a menacing gesture.
"You are likely to be eaten by a Grue. If this predicament seems particularly cruel, consider whose fault it might be; not a torch or a match in your inventory." https://youtu.be/4nigRT2KmCE