[Bug 12156] New: closing multiple help windows crashes wine

http://bugs.winehq.org/show_bug.cgi?id=12156

Summary: closing multiple help windows crashes wine
           Product: Wine
           Version: 0.9.57.
          Platform: PC-x86-64
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P2
         Component: hhctrl.ocx
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

Created an attachment (id=11553)
 --> (http://bugs.winehq.org/attachment.cgi?id=11553)
the stack strace of one insance

This is a follow-up to bug 8246 (the original issue is almost fixed with a
known patch). I found that if I launch multiple help windows, such as
typing "?str", "?rbind", "?cbind", "?stats" in Rgui, then trying to close 
those extra help windows one by one, wine would get stuck and stop responding; 
at one point it actually crashed with a stack trace in shdocvw/webbrowser.c
(see stack trace attached).

The stuck/crash is almost produceable everything if I have say, 5 help windows
like I detailed.

This is filed just in case somebody can read the stack trace...