Error message in catch incomplete for p:xinclude

[gimsieke]

As reported by David Cramer on xproc-dev: When putting p:xinclude in p:try, the document on the error port has very little details. I tried it with 1.2.1-99.

Running Untitled1.xpl

<p:declare-step xmlns:p="http://www.w3.org/ns/xproc"
  xmlns:c="http://www.w3.org/ns/xproc-step" version="1.0">
  <p:output port="result" primary="true"/>
  <p:try>
    <p:group>
      <p:load href="Untitled2.xml"/>
      <p:xinclude/>
    </p:group>
    <p:catch name="catch">
      <p:identity>
        <p:input port="source">
          <p:pipe port="error" step="catch"/>
        </p:input>
      </p:identity>
    </p:catch>
  </p:try>
</p:declare-step>

on Untitled1.xml

<doc>
  <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="some.xml"/>
</doc>

results in

<c:errors xmlns:c="http://www.w3.org/ns/xproc-step">
  <c:error href="file:/C:/cygwin/home/gerrit/Dev/Calabash/Untitled1.xpl" line="3" column="59">XProc error
    err:XD0011</c:error>
</c:errors>

Without try/catch:

ERROR: Untitled1.xpl:8:20:XInclude resource error (some.xml) and no fallback provided.
ERROR:     cause: err:XD0011:XProc error err:XD0011
ERROR: XInclude resource error (some.xml) and no fallback provided.
ERROR: Underlying exception: I/O error reported by XML parser processing file:/C:/cygwin/home/gerrit/Dev/Calabash/some.xml: C:\cygwin\home\gerrit\Dev\Calabash\some.xml (The system cannot find the file specified)

It would be nice if at least this level of information were available in the caught error message.