[Bug 49575] New: Delphi applications no longer show their main window in the WM's taskbar

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=49575

Bug ID: 49575
           Summary: Delphi applications no longer show their main window
                    in the WM's taskbar
           Product: Wine
           Version: 5.12
          Hardware: x86-64
                OS: Linux
            Status: NEW
          Keywords: regression
          Severity: normal
          Priority: P2
         Component: winex11.drv
          Assignee: [e-mail]
          Reporter: [e-mail]
   Regression SHA1: 3ad40bf64732cbef4ba199a45eefa12f4b491419
      Distribution: ---

Created attachment 67724
  --> https://bugs.winehq.org/attachment.cgi?id=67724
test app (source + binary)

This is probably a resurface of the bug 12264. Main window of the applications
created with Delphi no longer appears in the WM's taskbar. Once main window of
the application is minimized it's no longer possible to restore it.

This is a regression caused by

commit 3ad40bf64732cbef4ba199a45eefa12f4b491419
Author: Alexandre Julliard 
Date:   Mon Oct 29 14:37:56 2012 +0100

winex11: Delay mapping a layered window until its attributes are set.

Please find in the attachment a simple test app that reproduces the problem.