Oreon-Lime-R2/mingw-wine-gecko/wine-gecko-2.47.4-src/wine-gecko-2.47.4/dom/xul/crashtests/509719-1-overlay.xul

<overlay xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
  <window id="win" removeelement="true"/>
</overlay>