serializer crash when including-content-type

[Matthias Brantner]

The serializer crashes with the following query:

import schema namespace output = "http://www.w3.org/2010/xslt-xquery-serialization";

fn:serialize(
  fn:parse-xml("<stack/>"),
  <output:serialization-parameters>
    <output:method value="html"/>
    <output:include-content-type value="yes"/>
  </output:serialization-parameters>
)

The problem occurs when trying to add the meta element because of the include-content-type option. It only happens if the element to serialize results from parsing it (i.e. it works with a direct constructor).