<?xml version="1.0"?>
<!--
Program received signal SIGSEGV, Segmentation fault.
0xb6b720a6 in nsTreeColumns::RestoreNaturalOrder (this=0xa947a580) at layout/xul/base/src/tree/src/nsTreeColumns.cpp:610
610	  mTree->Invalidate();
(gdb) bt 3
#0  0xb6b720a6 in nsTreeColumns::RestoreNaturalOrder (this=0xa947a580) at layout/xul/base/src/tree/src/nsTreeColumns.cpp:610
#1  0xb736c76f in NS_InvokeByIndex_P () at xpcom/reflect/xptcall/md/unix/xptcinvoke_gcc_x86_unix.cpp:69
#2  0xb6171901 in XPCWrappedNative::CallMethod (ccx=..., mode=XPCWrappedNative::CALL_METHOD)
    at js/src/xpconnect/src/xpcwrappednative.cpp:2722
(More stack frames follow...)
(gdb) list
605	    child->SetAttr(kNameSpaceID_None, nsGkAtoms::ordinal, ordinal, PR_TRUE);
606	  }
607	
608	  nsTreeColumns::InvalidateColumns();
609	
610	  mTree->Invalidate();
611	
612	  return NS_OK;
613	}
614	
(gdb) p mTree
$9 = (nsITreeBoxObject *) 0x0

|child->SetAttr()| dispatches "DOMAttrModified" event. Event listener removes
whole tree, |mTree| is being set to null. Then we have |null->Invalidate()|.
-->
<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
        onload="run();">
<tree id="tree">
  <treecols>
    <treecol id="col"/>
  </treecols>
  <treechildren/>
</tree>
<script type="text/javascript"><![CDATA[
var tree = null;

function listener() {
  tree.parentNode.removeChild(tree);
}

function run() {
  col = document.getElementById("col");
  col.addEventListener("DOMAttrModified", listener, true);
  tree = document.getElementById("tree");
  tree.columns.restoreNaturalOrder();
}
]]></script>
</window>

