[Bug 56571] New: osu! quits with InvalidCastException when using wine-mono

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=56571

Bug ID: 56571
           Summary: osu! quits with InvalidCastException when using
                    wine-mono
           Product: Wine
           Version: 9.6
          Hardware: x86-64
               URL: https://m1.ppy.sh/r/osu!install.exe
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: mscoree
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ArchLinux

Created attachment 76324
  --> https://bugs.winehq.org/attachment.cgi?id=76324
Snippet of Wine Mono log with the cast exception

Hello,

So osu!(stable) quits after the osu! logo (with InvalidCastException being
shown in the terminal when using the WINE_MONO_TRACE=frog variable) when
running the game with wine-mono installed (instead of .NET)

Installing .NET with the dotnet45 winetricks verb allows the game to run again
(like with bug 50111)

I think this bug may be a continuation of
https://bugs.winehq.org/show_bug.cgi?id=50111 (because I see
marshalling-related functions before the exception gets thrown in the Mono log)

I'll attach a snippet of the relay-level Wine Mono log that has the exception
stuff (the full log is likely too big even after compression)

I tried editing the RuntimeAssembly class to public in dnSpy for the Wine Mono
mscorlib.dll (but I got an EXCEPTION_ILLEGAL_INSTRUCTION exception instead with
no obvious explanation for that in the Wine Mono log which of course prevented
the game from starting)