[Bug 57877] New: CMD: Parsing issue: Mismatch in parentheses provoked by trailing tab

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=57877

Bug ID: 57877
           Summary: CMD: Parsing issue: Mismatch in parentheses provoked
                    by trailing tab
           Product: Wine
           Version: 10.2
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: cmd
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Wine has issues in parsing if-statements like the following:

if not [%FOO:~-1%] == [True] (    <----- NOTE THE TRAILING TAB HERE
    echo ENTERED IF-EXPRESSION
)

On Windows those kind of expressions execute as expected but on Wine it errors
with a note 'Mismatch in parentheses.'. While playing around with this
construct I realised that the trailing tab may cause this issue. As soon as I
remove it, the code seems to work.

See also the attached reproducers.

For reference this, is the last issue to get the PlanAhead (part of Xilinx ISE)
batch scripts to work. They are responsible for configuring the environment and
starting the GUI.