[Bug 41508] New: Menu infinitely loops, the application hangs.

https://bugs.winehq.org/show_bug.cgi?id=41508

Bug ID: 41508
           Summary: Menu infinitely loops, the application hangs.
           Product: Wine
           Version: 1.9.20
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: user32
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

It happens on all programs with main menu.

Example how to reproduce:

Start "wine regedit" (it can be reproduced with any other program with main
menu)

Press Alt+E in order to open the Edit submenu (or any other Alf+Key shortcut)
While holding the Alt key pressed down, after the Edit submenu is opened, press
Left or Right arrow keys.

The active submenu start to cycle infinitely through all submenus and the
application does not accept any keyboard input. The mouse is captured to the
WINE application and not working for the whole desktop environment (tested with
XFCE).

In the same time, the main message loop works, because the refresh of the
window is normal and for example the hint text in the status bar cycles
according to the currently active submenu. The CPU usage is high at least for
one of the cores.

The cycle stops when the active application is changed to any other. This
change is possible only by using the keyboard (for example by pressing Alt+Tab
or Alt+F4), because of the captured mouse.