Rule not fired when context is a comment node

[dmj]

Using the following Schematron:

<sch:schema>
  <sch:pattern>
    <sch:rule context="comment()">
      <sch:assert test="false()"/>
    </sch:rule>
  </sch:pattern>
</sch:schema>

And the following document:

<?pi Processing instruction ?>
<element attribute="value">
  <!-- Comment -->
  <element>Text content</element>
</element>

I expect the assertion to fail.

But instead I get the following:

<?xml version="1.0" encoding="UTF-8"?>
<schematron-output xmlns="http://purl.oclc.org/dsdl/svrl">
  <active-pattern/>
</schematron-output>

This was discovered with running ph-schematron 5.2.0 against a in-progress schematron testsuite. The complete test results are shown here.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[phax]

This is a long standing issue, and I tested it with the latest version and here are my results.
When using your proposed Schematron

<?xml version="1.0" encoding="utf-8"?>
<sch:schema xmlns:sch="http://purl.oclc.org/dsdl/schematron" queryBinding="xslt2">
  <sch:pattern>
    <sch:rule context="comment()">
      <sch:assert test="false()">Found a comment</sch:assert>
    </sch:rule>
  </sch:pattern>
</sch:schema>

and this test XML

<?xml version="1.0" encoding="UTF-8"?>
<?pi Processing instruction ?>
<element attribute="value">
  <!-- Comment -->
  <element>Text content</element>
</element>

I get the following output when using the ISO Schematrons:

<?xml version="1.0" encoding="UTF-8"?>
<ns2:schematron-output xmlns:ns2="http://purl.oclc.org/dsdl/svrl" title="" schemaVersion="">
  <ns2:active-pattern document="C:\dev\git\ph-schematron\ph-schematron-xslt\src\test\resources\issues\github83\test.xml" />
</ns2:schematron-output>

The same error with SchXslt 1.8.5:

<?xml version="1.0" encoding="UTF-8"?>
<ns2:schematron-output xmlns:ns2="http://purl.oclc.org/dsdl/svrl">
  <ns2:active-pattern documents="C:\dev\git\ph-schematron\ph-schematron-schxslt\src\test\resources\issues\github83\test.xml" />
</ns2:schematron-output>

and with the pure version:

<?xml version="1.0" encoding="UTF-8"?>
<ns2:schematron-output xmlns:ns2="http://purl.oclc.org/dsdl/svrl">
  <ns2:active-pattern />
</ns2:schematron-output>

In the meantime you maybe more qualified that question yourself @dmj ???