https://bugs.winehq.org/show_bug.cgi?id=49025
--- Comment #9 from aguertin+wine@aguertin.net --- (In reply to Olivier F. R. Dierick from comment #8)
@OP: Was your original issue 'Unhandled exception code c0000005', like bug 49013?
This is not the same as bug 49013. There is no terminal output from the issue I am seeing.
There is a dialog created by the league of legends crash handler process that says "A critical error has been detected and the process must be terminated." and has options for creating a crash dump to share with Riot. (Willing to share that here, if it would be helpful.)
This may be the same as bug 49007, but there's not enough info to be sure. Reverting fd79929 fixes both of them, but bug 48961 and bug 48971 were both fixed without reverting, and they were separate bugs that needed separate fixes.