BUG: Crash at first fountain in Monastery

[kcthrn]

At the first fountain in the Monastery, the game crashes to the prompt when choosing to accept or decline to save (I haven't completed the level yet so I don't know if there are more fountains).

On my first time interacting with it I managed to save the game. I was able to reload the game and travel around, use shops, talk to NPCs without any problems so the save doesn't seem to be corrupted.

Here's the text captured after the crash (don't want to risk corruption so I'm declining to save this time):

 TIC-80 tiny computer 0.70.6
 http://tic.computer (C) 2017

 hello! type help for help

>surf
>
cart Shadow Over the Twelve Lands.tic loaded!
use RUN command to run it

tic.computer/play/Games>XL init LO
tic.computer/play/Games>XL init HI
tic.computer/play/Games>TLUT 103
tic.computer/play/Games>LVL init 36
tic.computer/play/Games>TILE init 120
tic.computer/play/Games>ENT load 35
tic.computer/play/Games>ZDB 15
tic.computer/play/Games>PMc 421
tic.computer/play/Games>ch lvl 24 e1
tic.computer/play/Games>[string "-- title: Shadow Over the Twelve Lands..."]:949: Can't kill 3,4
stack traceback:
	[C]: in function 'assert'
	[string "-- title: Shadow Over the Twelve Lands..."]:949: in function 'I0'
	[string "-- title: Shadow Over the Twelve Lands..."]:1866: in function 'S4'
	[string "-- title: Shadow Over the Twelve Lands..."]:1784: in function 'Q6'
	[string "-- title: Shadow Over the Twelve Lands..."]:1765: in function 'n2'
	[string "-- title: Shadow Over the Twelve Lands..."]:1851: in function 'c1'
	[string "-- title: Shadow Over the Twelve Lands..."]:1859: in function 'R8'
	[string "-- title: Shadow Over the Twelve Lands..."]:122: in function 'z9'
	[string "-- title: Shadow Over the Twelve Lands..."]:182: in function 'A6'
	[string "-- title: Shadow Over the Twelve Lands..."]:661: in function 'g4'
	[string "-- title: Shadow Over the Twelve Lands..."]:641: in function 'G0'
	[string "-- title: Shadow Over the Twelve Lands..."]:599: in function 'TIC'
tic.computer/play/Games>