FreeBSD web build failed on build-web.stream.freebsd.org

[User Www-data]

===> ../../zh_CN.GB2312/htdocs/doc/books/arch-handbook (all)
===> ../../zh_CN.GB2312/htdocs/doc/books/handbook (all)
===> ../../zh_CN.GB2312/htdocs/doc/books/porters-handbook (all)
/usr/bin/grep '^<?xml version=.*?>' book.xml > book.parsed.xml.tmp
echo '<!DOCTYPE book PUBLIC "-//FreeBSD//DTD DocBook XML V4.5-Based Extension//EN" "../../../share/xml/freebsd45.dtd">' >> book.parsed.xml.tmp
==> Basic validation
env XML_CATALOG_FILES="file:///home/www/build/head/zh_CN.GB2312/books/porters-handbook/catalog-cwd.xml  file:///home/www/build/head/zh_CN.GB2312/share/xml/catalog.xml  file:///home/www/build/head/share/xml/catalog.xml  file:///home/www/build/head/share/xml/catalog-common.xml  file:///usr/local/share/xml/catalog" /usr/local/bin/xmllint --nonet --noent --valid --xinclude --dropdtd /home/www/build/head/zh_CN.GB2312/books/porters-handbook/book.xml |  /usr/bin/grep -v '^<?xml version=.*?>' >> book.parsed.xml.tmp
/home/www/build/head/zh_CN.GB2312/books/porters-handbook/book.xml:12222: parser error : Opening and ending tag mismatch: row line 12216 and entry
		      (未变动)</entry>
		                         ^
/home/www/build/head/zh_CN.GB2312/books/porters-handbook/book.xml:12223: parser error : Opening and ending tag mismatch: tbody line 9906 and row
		  </row>
		        ^
/home/www/build/head/zh_CN.GB2312/books/porters-handbook/book.xml:13527: parser error : Opening and ending tag mismatch: tgroup line 9897 and tbody
		</tbody>
		        ^
/home/www/build/head/zh_CN.GB2312/books/porters-handbook/book.xml:13528: parser error : Opening and ending tag mismatch: table line 9895 and tgroup
	      </tgroup>
	               ^
/home/www/build/head/zh_CN.GB2312/books/porters-handbook/book.xml:13529: parser error : Opening and ending tag mismatch: sect1 line 9888 and table
	    </table>
	            ^
/home/www/build/head/zh_CN.GB2312/books/porters-handbook/book.xml:13540: parser error : Opening and ending tag mismatch: chapter line 9748 and sect1
      </sect1>
              ^
/home/www/build/head/zh_CN.GB2312/books/porters-handbook/book.xml:14090: parser error : Opening and ending tag mismatch: book line 13 and chapter
    </chapter>
              ^
/home/www/build/head/zh_CN.GB2312/books/porters-handbook/book.xml:14092: parser error : Extra content at the end of the document
    <chapter id="porting-samplem">
    ^
*** [book.parsed.xml] Error code 1

Stop in /home/www/build/head/zh_CN.GB2312/books/porters-handbook.
*** [all] Error code 1

Stop in /home/www/build/head/zh_CN.GB2312/books.
*** [all] Error code 1

Stop in /home/www/build/head/zh_CN.GB2312.
*** [all-all] Error code 1

Stop in /home/www/build/head/zh_CN.GB2312/htdocs/doc.
*** [all] Error code 1

Stop in /home/www/build/head/zh_CN.GB2312/htdocs.
*** [all] Error code 1

Stop in /home/www/build/head/en_US.ISO8859-1/htdocs.
      470.58 real       436.84 user        33.81 sys