[Bug 10543] worms armageddon crashes when clicking the menu

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=10543





--- Comment #1 from Vincent Povirk <madewokherd at gmail.com>  2007-11-22 15:22:48 ---
I believe this is significant:

The game only crashes when I click on a button. If I click on the background
(which is a useless and silly thing to do), the game continues to run.

Worms Armageddon creates two top-level windows: one titled Worms Armageddon and
one titled T17. Each screen in the menu is actually a dialog that it paints
over with directdraw.

I've made a +win,+dialog log with 0.9.48 and 0.9.49 of me clicking on a button
in the WA menu. After the click (which I located by searching for SendInput
mouse), the logs begin to diverge at WINPOS_ActivateOtherWindow (apparently
this function is called as a result of EndDialog). I do not understand the
purpose of that function or how it works, but in 0.9.48 it chooses T17. In
0.9.49, it chooses (nil). I believe this is causing WA to attempt to minimize
itself at a critical time and causing the crash.

Since WINPOS_ActivateOtherWindow was not modified in the patch identified by
git bisect, I believe that the difference is because of other ways that the
windows were treated differently before that function was called.

I think that if I understood why WINPOS_ActivateOtherWindow used to choose T17,
I would know much more about this problem. It seems to me it should only choose
a root window or a sibling of the hwnd passed to it as an argument (which in
this case should be the dialog, a child of Worms Armageddon). Can anyone
explain or point me to documentation about any of this?

I will attached the gzipped logs.


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