[Bug 17925] New: Winetest segfaults if (32-bit) gecko is installed

http://bugs.winehq.org/show_bug.cgi?id=17925

Summary: Winetest segfaults if (32-bit) gecko is installed
           Product: Wine
           Version: 1.1.18
          Platform: PC-x86-64
        OS/Version: Linux
            Status: NEW
          Keywords: download, source, testcase
          Severity: major
          Priority: P2
         Component: -unknown
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

Strange bug, but winetest64 is repeatedly segfaulting if gecko is installed:
fixme:win:EnumDisplayDevicesW ((null),0,0x7f89c313f0e0,0x00000000), stub!
err:d3d_surface:IWineGDISurfaceImpl_LockRect (0x7f89c53283f0) Surface already
locked
err:d3d_surface:IWineGDISurfaceImpl_LockRect (0x7f89c5328d30) Surface already
locked
err:d3d_surface:IWineGDISurfaceImpl_LockRect (0x7f89c5328d30) Surface already
locked
err:d3d_surface:IWineGDISurfaceImpl_LockRect (0x7f89c53323f0) Surface already
locked
err:d3d_surface:IWineGDISurfaceImpl_LockRect (0x7f89c53323f0) Surface already
locked
err:d3d_surface:IWineGDISurfaceImpl_LockRect (0x7f89c5332d30) Surface already
locked
Segmentation fault (core dumped)

after ddraw:visual o.0. I can't see why on earth it would segfault there, but
if I remove the geckourl from the registry, winetest64 runs to completion.