[Bug 20669] Certain objects found in game cause EQ2 to crash.

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=20669





--- Comment #7 from Jarod <wine at faltine.com>  2010-02-25 03:52:36 ---
Created an attachment (id=26471)
 --> (http://bugs.winehq.org/attachment.cgi?id=26471)
Backtraces 1.1.18 to 1.1.39

I am not sure it is the same bug as #19659 but it might be related: it looks
like there are several crashes that might come from the following patch: 

commit 014c4bfc70a4d4e60f033d579d1be13a46f65170
Author: Stefan Dösinger <stefan at codeweavers.com>
Date:   Thu Apr 9 18:40:57 2009 +0200

    wined3d: Save some memory in vertex buffers.

I prefer to post here because it is exactly the symptoms I experience: certain
objects found in game cause crashes. It never crashes randomly shortly after
entering the game: there is always an object or a character coming into view,
and I can play all night if I stay away from such objects. I never experienced
a crash with version 1.1.18 yet. The patcher doesn't work for me with this
version, but if I patch using 1.1.39 I can get into the game by launching
EverQuest2.exe directly. I haven't noticed any difference in game between
versions yet, apart from the crashes. The hardware I use is a nvidia nForce
chipset 7050 with integrated video. The graphical options in game are set for
"extreme performance" because it is the only setting offering a fluid game on
this hardware, be it on windows or linux. I might not be experiencing some
crashes other people with better hardware and better settings experience.

I made the regression test between 1.1.18 and 1.1.19 as Scott Murray did but I
specifically kept testing only one thing: crafting stations, because it is easy
to get in the situation and allow to get rid of any randomness in the testing.
I also tested with 1.1.39 and the feb, 24 version from the git repository. I
noticed it is the action of crafting, or witnessing someone who crafts, that
gives a crash 100% of the time. I sometimes can look at crafting stations for a
time without crashing.

The backtrace I get is always the same, as far as I can tell (see attached
backtraces.tgz). In all the versions I tested there are those same lines, and a
few others:
wine: Unhandled page fault on read access to 0xffffffff at address 0xa768f7
(thread 0009), starting debugger...
Unhandled exception: page fault on read access to 0xffffffff in 32-bit code
(0x00a768f7).

My conclusion is that the crash I get with crafting stations hasn't changed
since this patch. The other crashes might have the same cause, or not.

What I plan to do is:
- stress test 1.1.18 to confirm there is no crash, even while raiding with lots
of people or crafting for a long time
- test the first buggy version in all situations other than crafting and record
the backtraces and the object who triggered it
- try to provide +d3d,+tid traces, but it is not very easy for me at is slows
the machine down to a crawl.
- do whatever the devs ask :)

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