SCUMM: Zak McKracken (FM-Towns) - Cutscene stack overflow after ending

[d0k3]

After finishing the game, the console pops up and I get:
ERROR: (25:139:0xB): Cutscene stack overflow

SCUMMVM v2.0.0 on Android
Zac McKracken (FM-TOWNS, english), with applied german translation from ​https://www.la-patches.de/patches.php

Assuming the problem happens with an unpatched Zac McKracken (FM-TOWNS), too. Will replay it in english. Maybe someone has an endgame save for that to do this quicker.

[dafioram]

I'm guessing you tried to load your save from an unpatched version and it did not work?

[dafioram]

English FM Towns Ending

[dafioram]

I am not able to reproduce a crash after the ending happens for the English FM-Towns version.

[d0k3]

@dafioram, no I didn't. I don't have a english version save, and I played this version beginning to end.I guess the problem is for the german translation patch specifically then.

[BenCastricum]

This is not a bug in ScummVM, and also not in the original game/data. IMHO this bug can be closed.

[dwatteau]

I tried reproducing this by triggering the ending credits this way in the debugger:

room 25
script 139 run

but I couldn't reproduce the problem with the German patch.

I see that this fan translation added a \013 (or \x0D) character at the end of every string inside the game. This is probably because they used scummtr to do the translation, with its -w option for CRLF line returns during the initial export, but they probably forgot to use it during the import, causing the insertion of real \r carriage returns inside the game strings.

I'm not sure the game is happy with this. Padded strings that should end with @@@ now end with @@@\013. Internal sequences such as \255\004\175\000\255\002 now become \255\004\175\000\255\002\013, which is unexpected. ScummVM prints this kind of warnings with this version, for example:

'!RNING: findVirtScreen(200) failed, therefore printChar cannot print '

I'm not sure the stack overflow came from there, but I think it's quite possible. I'm not aware of a similar problem with the original English version or with the French fan translations I know (but the German version also changed some other objects, such as as Zak's floor).

The strings inside the la-patches.de fan translation could maybe be fixed with something like this:

scummtr -g zaktowns -c -of tmp.txt
perl -pi -e 's/\\013$//' tmp.txt
scummtr -g zaktowns -c -if tmp.txt

but then all past saves for this version would be invalidated, I believe.

With no way to reproduce this at the moment, and knowing than this fan translation has a problem in its string format, I don't think ScummVM can do much about this...