Code is from CVS, dated by 24 December 2003.

Source XML document:

----- <document.xml>
<?xml version='1.0'?>
<div>
 <xi:include href="example.txt" parse="text"
xmlns:xi="http://www.w3.org/2003/XInclude">
  <xi:fallback>
   <xi:include href="fallback-example.txt" parse="text">
    <xi:fallback><a href="mailto:bob@example.org">Report
error</a></xi:fallback>
   </xi:include>
  </xi:fallback>
 </xi:include>
</div>
----- </document.xml>

When neither example.txt nor fallback-example.txt are available, the result
should be:

----- <expected>
<?xml version='1.0'?>
<div>
 <a href="mailto:bob@example.org">Report error</a>
</div>
----- </expected>

but actual result is:

----- <result>
<?xml version="1.0"?>
<div>
 
   <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
href="fallback-example.txt" parse="text">
    <xi:fallback>
     <a href="mailto:bob@example.org">Report error</a>
    </xi:fallback>
   </xi:include>
  
</div>
----- </result>

Also, there are no error messages produced.