[Bug 50642] New: Wine cmd handles incorrectly if-set when expanding variable with brackets

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=50642

Bug ID: 50642
           Summary: Wine cmd handles incorrectly if-set when expanding
                    variable with brackets
           Product: Wine
           Version: 6.1
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: cmd
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 69352
  --> https://bugs.winehq.org/attachment.cgi?id=69352
Testcase

Wine cmd handles incorrectly expression with if and set when there is an
expansion of variable which value contains brackets:

if exist "%ProgramFiles%" set var=%ProgramFiles%\somefolder

Can't recognize 'x86' as an internal or external command, or batch script.
Can't recognize '\somefolder' as an internal or external command, or batch
script.

See attached test case.