[Bug 49659] A program dump dialog occurs when launching Mahjong Titans using version 5.14 of Wine. Appears to be a regression in msdmo.dll.

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=49659

--- Comment #4 from Craig Schulstad <craigaschulstad at gmail.com> ---
Alistair,

Attached is a log created as you requested (log.txt).  Running that reminded me
of an additional bit of information I forgot to include.  I set up these games
in a 32-bit wine bottle (WINEARCH=win32 WINEPREFIX=/home/craig/Wine/Oberon). 
So I actually ran the requested command as follows:

WINEPREFIX=/home/craig/Wine/Oberon WINEDEBUG=loaddll,msdmo wine Mahjong.exe >&
log.txt

Also, over the last couple of days, I have experimented with the dmoreg.c
program for both the 5.12 version and the 5.14 version of the code.  I
localized the function in which the program falls over and it occurs in
function "IsMediaTypeEqual" when it invokes the "IsEqualCLSID" function.  I
tracked down the specifications for that function and found that it was just a
macro for calling the "memcmp" function, which does not like receiving an
argument value of zero.  I backtracked from the call of the "IsMediaTypeEqual"
function and focused on the "IEnumDMO_fnNext" function.  That appears to be
where the issue develops.  Placing "WINE_FIXME" statements at many of the same
spots as the "TRACE" statements, I noticed a difference in the data extracted
from the registry.  I don't know if that's a red herring, but I am attaching
another text file where I contrast the detail that is produced within the
function "IEnumDMO_fnNext" for version 5.12 and version 5.14 (msdmo.txt). 
Hopefully this will assist you in your investigation.  Please let me know if
you require any additional information.

Regards,

Craig

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