[Bug 57570] New: Syntax Error in CMD Batch Parsing

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=57570

Bug ID: 57570
           Summary: Syntax Error in CMD Batch Parsing
           Product: Wine-staging
           Version: 10.0-rc3
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
                CC: [e-mail], [e-mail]
      Distribution: ---

Created attachment 77673
  --> https://bugs.winehq.org/attachment.cgi?id=77673
running wine cmd

When attempting to run the `msys2_shell.cmd` script from MSYS2, Wine fails with
a syntax error: `Syntax error: unexpected IN`. This issue occurs during the
batch file parsing phase.

1. Download the MSYS2 base archive from the following link:
   ```

https://github.com/msys2/msys2-installer/releases/download/2024-12-08/msys2-...
   ```
2. Extract the archive to a directory, e.g., `Z:\msys2\msys64`.
3. Navigate to the extracted directory:
   ```
   Z:\msys2\msys64>
   ```
4. Run the `msys2_shell.cmd` script with the following arguments:
   ```
   msys2_shell.cmd -here -defterm -no-start
   ```
5. Observe the error:
   ```
   Syntaxfehler
   Syntax error: unexpected IN
   ```

The `msys2_shell.cmd` script should execute without errors and launch the MSYS2
shell environment.

Wine fails with a syntax error: `Syntax error: unexpected IN`.