https://bugzilla.wikimedia.org/show_bug.cgi?id=68149

            Bug ID: 68149
           Summary: Make LinearDoc.js signal an error if given ill-formed
                    XML
           Product: MediaWiki extensions
           Version: unspecified
          Hardware: All
                OS: All
            Status: NEW
          Severity: minor
          Priority: Unprioritized
         Component: ContentTranslation
          Assignee: [email protected]
          Reporter: [email protected]
                CC: [email protected], [email protected],
                    [email protected], [email protected],
                    [email protected], [email protected],
                    [email protected], [email protected],
                    [email protected]
       Web browser: ---
   Mobile Platform: ---

At the moment, LinearDoc.js will accept ill-formed XML containing syntax like
<!--- foo ----> , which then gets misinterpreted.

For example, the document '<p>foo<!-- bar -->baz</p>' correctly gives the
following LinearDoc (XML dump):

  <p>
  <cxtextblock>
    <cxtextchunk>foo</cxtextchunk>
    <cxtextchunk>baz</cxtextchunk>
  </cxtextblock>
  </p>

However, the ill-formed document '<p>foo<!--- bar ---->baz</p>' gives the
following LinearDoc (XML dump):

  <p>

The expected behaviour is to signal an XML parser error on reading the
ill-formed document.

This bug occurs because the nodejs sax 0.6.0 module silently accepts ill-formed
XML, which violates 5.1 of http://www.w3.org/TR/REC-xml/ ("Validating and
non-validating processors alike must report violations of this specification's
well-formedness constraints").

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