The main cause of this is the error message produced by the invalid XML. In this case topic 20003 has an un-escaped ampersand and the error message isn't escaping the ampersand in the error message.
Fixed in 0.33.7 The error messages and tags are now escaped so that any keywords/characters are escaped as XML entities. Also since I had to hide the initial comment due to our linking policy, here is the initial problem: In some instances, CSP maps with incorrect or invalid XML end up breaking the docbuilder build for that map. An example is CSP ID 19999, created by a new writer. Expected behavior, unless I'm mistaken, is for the book to appear with errors for the topics that contain invalid or incorrect XML. *** publican.log *** not well-formed (invalid token) at line 9, column 110, byte 734: <chapter><title>Compiler Output</title><itemizedlist id="TagErrorXRef20003" ><title>Topic ID 20003</title><listitem><para>INFO: Topic Types: Concept Assigned Writer: rghatvis </para></listitem> <listitem><para>INFO: <ulink url="SNIP">Topic URL</ulink></para></listitem> <listitem><para>ERROR: This topic doesn't have well-formed xml. The entity name must immediately follow the '&' in the entity reference. The processed XML is <programlisting><![CDATA[<section> =============================================================================================================^ <!-- Topic type: Concept --> at /usr/lib64/perl5/XML/Parser.pm line 187 [31mWARNING: Unknow config key git_branch, ignoring. [0mSetting up en-US Processing file tmp/en-US/xml/Common_Content/Conventions.xml -> tmp/en-US/xml/Common_Content/Conventions.xml Processing file tmp/en-US/xml/Common_Content/Feedback.xml -> tmp/en-US/xml/Common_Content/Feedback.xml Processing file tmp/en-US/xml/Common_Content/Legal_Notice.xml -> tmp/en-US/xml/Common_Content/Legal_Notice.xml Processing file tmp/en-US/xml/Common_Content/Program_Listing.xml -> tmp/en-US/xml/Common_Content/Program_Listing.xml Processing file tmp/en-US/xml/Common_Content/Revision_History.xml -> tmp/en-US/xml/Common_Content/Revision_History.xml Processing file tmp/en-US/xml_tmp/Author_Group.xml -> tmp/en-US/xml/Author_Group.xml Processing file tmp/en-US/xml_tmp/Book_Info.xml -> tmp/en-US/xml/Book_Info.xml Processing file tmp/en-US/xml_tmp/Errors.xml -> tmp/en-US/xml/Errors.xml *** end publican.log ***
This was released as part of 1.0.0