[Bug 56399] New: cmd.exe's %~s modifier (short DOS path) expands to mixed short/long format

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=56399

Bug ID: 56399
           Summary: cmd.exe's %~s modifier (short DOS path) expands to
                    mixed short/long format
           Product: Wine
           Version: 9.2
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: cmd
          Assignee: [e-mail]
          Reporter: tncgyp+uypezc35u0dyxed6tszn0wk59xjphxb2gcxycxno8mxg4od
                    [e-mail]
      Distribution: ---

Try the following:

cd /tmp &&
printf 'for %%%%P in ("%%ProgramFiles%%\Internet Explorer") do winepath.exe -s
%%%%P\r\n' > shortpath.bat &&
wine cmd.exe /c shortpath.bat &&
printf 'for %%%%P in ("%%ProgramFiles%%\Internet Explorer") do echo
%%%%~sP\r\n' > shortpath.bat &&
wine cmd.exe /c shortpath.bat &&
rm shortpath.bat &&
cd "$OLDPWD"

The first batch file uses winepath.exe -s and returns 'C:\PROG~5P2\INTE~H1A'.
The second batch file uses cmd.exe's %~s modifier and returns
'C:\PROG~5P2\Internet Explorer'.
Wine's cmd.exe %~s modifier seems to be broken. It should produce the same path
as winepath.exe -s.
The second batch file works as expected with MS cmd.exe in a WinXP VM and a
Win7 VM.

Tested on wine 9.2 with fresh prefixes and:
- WINEARCH=win32 and wine cmd.exe
- WINEARCH=win64 and wine cmd.exe
- WINEARCH=win64 and wine64 cmd.exe