QFG4: Necrotaurs chasing you outside town after the dungeon sequence

[lwcorp]

Necrotaurs are supposed to chase you after you meet a certain character south to the castle. However, they also chase you just outside town after the dungeon sequence.

If you let them catch you, ScummVM gets stuck with a bug message.

If you go back to town and then go outside, suddenly they're gone and you can continue playing.

[lwcorp]

As a matter of fact, if you let them catch you outside the town's gate (and not in the forest) then you get taken into the dungeon sequence again.
In other words, you can play that sequence till infinity.

[sluicebox]

That's funny, a while back I was trying to make sense of the flags that control this sequence and I made a note like "I don't think this would work?"

What's the error message you get? Can you attach a screenshot of it, and where you get stuck? I used your save game and walked south one screen to the town gate, waited until I got caught, but it just took me back to the dungeon, like you described in your update. How do I get it stuck? (There might be two bugs here)

[sluicebox]

Never mind, I can now reproduce the kUpdateScreenItem error too.

I have a fix that looks promising so far, but I'll need to do a bit of testing against all the versions, since this bug is in each. Great catch!

[sluicebox <22204938+sluicebox@…>]

In 49914254:

SCI32: Fix QFG4 Ad Avis and Necrotaur chase

Fixes several script bugs, trac #11056

[sluicebox]

Wow, this uncovered three unrelated script bugs in the original game:

1. The chase repeating (under many circumstances)
2. Game randomly crashes after the screen goes black when the necrotaurs catch you in the woods
3. Game randomly crashes as soon as a necrotaur reaches you (CD version only)

To be clear, the first bug is just that the chase can reoccur after you've been caught. You don't have to reach Ad Avis in front of the castle, triggering the chase from the town gate (where he can catch you right there) is a normal alternative.