AI Roguelite (1889620)

Compatibility Report

• Name of the game with compatibility issues: AI Roguelite
• Steam AppID of the game: 1889620

System Information

• GPU: RTX 2060S
• Driver/LLVM version: nvidia 512.15
• Kernel version: n/a
• Link to full system information report as Gist:
• Proton version: All Proton versions are affected.

I confirm:

• [ x ] that I haven't found an existing compatibility report for this game.
• [ x ] that I have checked whether there are updates for my system available.

Symptoms

When using named pipes with win32file.SetFilePointer() (which is a standard win32 api call) in python compiled via Pyinstaller, it fails with pywintypes.error: (66, 'SetFilePointer', 'Bad device type.'). This works fine in Windows 10 and fails in Proton.

Reproduction

    import win32pipe, win32file

    pipe = win32pipe.CreateNamedPipe(
    r'\\.\pipe\\'+'my_pipe',
    win32pipe.PIPE_ACCESS_DUPLEX,
    win32pipe.PIPE_TYPE_MESSAGE | win32pipe.PIPE_READMODE_MESSAGE | win32pipe.PIPE_WAIT,
    1, 65536, 65536,
    0,
    None)

    win32file.SetFilePointer(pipe, 0, win32file.FILE_BEGIN)

Start by running the supplied Python reproduction under Proton and verify the named-pipe failure from win32file.SetFilePointer. Then trace Proton/Wine handling of that Win32 API for named pipes and compare it with Windows behavior. Done means the call no longer reports “Bad device type” for this case and the behavior is covered by an appropriate regression check.