[Bug 6827] New: The SimSig installer crashes

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=6827

Summary: The SimSig installer crashes
           Product: Wine
           Version: CVS
          Platform: PC
               URL: http://www.simsig.co.uk/html/downloads.html
        OS/Version: Linux
            Status: NEW
          Keywords: download, Installer
          Severity: normal
          Priority: P2
         Component: wine-shell32
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

The installer crashes in SHGetFileInfoW():

000d:Call shell32.SHGetFileInfoA(0045eae8,00000010,0034fcec,00000160,00001010)
ret=0045e9f6
000d:trace:seh:raise_exception code=c0000005 flags=0 addr=0x7e8871b2
000d:trace:seh:raise_exception  info[0]=00000000
000d:trace:seh:raise_exception  info[1]=00000000

More precisely the crash happens on this line:
    hr = IShellFolder_GetUIObjectOf(psfParent, 0, 1,
        (LPCITEMIDLIST*)&pidlLast, &IID_IExtractIconW,
        &uDummy, (LPVOID*)&pei);

And the reason is that psfParent is NULL. psfParent is initialized a bit 
above, but only if SHGetFileInfoW() was given a PIDL and 
SHGFI_USEFILEATTRIBUTES was not used. This means that whenever a 'real 
path' or SHGFI_USEFILEATTRIBUTES is used in combination with 
SHGFI_DISPLAYNAME, SHGFI_ICONLOCATION, SHGFI_ICON or SHGFI_SYSICONINDEX, 
then SHGetFileInfoW() will crash.

However we cannot just create a pidl since the 'real path' will usually 
refer to a nonexistent file or directory (in our case it is 
'c:\directory' so it's clear the installer just wants to know what's 
the icon for a standard directory).

Any idea?

Wine was built from today's Git but I suspect this issue has been present for a
long time.