[Bug 46870] League of Legends 8.12+ fails to start a game in Vista+ mode ( anticheat engine, SystemExtendedProcessInformation)

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=46870

--- Comment #47 from Paul Gofman <gofmanp at gmail.com> ---
I downloaded LoL client and tested it.

I could not reproduce any problem with the current Wine Staging (optimized
build), everything worked out of the box, no overrides, no crash on training
battle start.

I could reproduce the crash on training battle start after building with '-g
-O0'. I figured that the crash goes away for me if to take just xaudio2_7.dll
from the optimized build. Crash also goes away if I use native override for
xaudio2_7, or if I take xaudio2_7 from mainstream Wine even built with the same
'-g -O0' flags (mainstream Wine uses new FAudio based xaudio, while Staging is
using an old one). If I do an ugly hack defining WINAPI with DECLSPEC_HOTPATCH
in Staging xaudio, it changes nothing. So it doesn't look the problem has
anything to do with hotpatching.

The crash happens from
'IXAudio2VoiceCallback_OnVoiceProcessingPassStart(src->cb, underrun);' called
in do_engine_tick(). I did not track down what exactly goes wrong with it with
no optimization flags as I am not sure how much it is interesting given the old
xaudio is being replaced by FAudio one and that does not happen there.

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