Attempt to use message attribute on p:identity steps gives error err:XS0031 The option named ‘message’ is not allowed on a ‘p:identity’ step

[martin-honnen]

With Calabash 2.99.11, the pipeline

<?xml version="1.0"?>
<p:declare-step xmlns:p="http://www.w3.org/ns/xproc"
 version="3.0">
<p:input port="source"/>
<p:output port="result"/>
<p:identity message="{document-uri()}"/>
</p:declare-step>

gives the error

ERROR file:///SomePath/XProc3/identity-step/identity-test1.xpl:6:41 err:XS0031 The option named ‘message’ is not allowed on a ‘p:identity’ step.

Works fine with Morgana and not being able to use the message attribute makes debugging what goes wrong in your pipeline rather difficult.