@main[]
^try{	
	^mustfail[]
}{
	^if($exception.type eq xml){
		failed, that's OK
		$exception.handled(1)
	}
}

@mustfail[]
$dom_from_disk[^xdoc::create[input]]
$dom_created_in_air[^xdoc::create[doc]]
^dom_created_in_air.documentElement.appendChild[^dom_from_disk.documentElement.cloneNode(1)]
^show_xdoc2[$dom_created_in_air]

@show_xdoc2[xdoc]
<pre>^taint[html][^xdoc.string[
	$.method[html]
]]
</pre>