[Bug 57011] New: GameStudio 3D program freezes on fflush since wine-9.5

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=57011

Bug ID: 57011
           Summary: GameStudio 3D program freezes on fflush since wine-9.5
           Product: Wine
           Version: 9.13
          Hardware: x86-64
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 76855
  --> https://bugs.winehq.org/attachment.cgi?id=76855
Test script for 3D Gamestudio

Originally reported at https://forum.winehq.org/viewtopic.php?p=144395

This is a regression between wine-9.4 and wine-9.5.

The program can be downloaded from
http://www.opserver.de/down/gstudio8_setup.exe
Install the free version in a 32bit WINEPREFIX. Run SED.exe.
Click Project->New Project. Enter a name, save it somewhere and press no to the
next question.
Click File->New, enter the test code from the attachment and save it somewhere.
Press the run button in the script editor.

The newly opened game freezes and the terminal spams lines like
> 0284:err:sync:RtlpWaitForCriticalSection section 0031FE30 #0001 wait timed out in thread 0284, blocked by 2620054, retrying (60 sec)

For further tests you can just open the save script.