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

[User Www-data]

Writing uses-libedit.html for sect1(uses-libedit)
Writing uses-libtool.html for sect1(uses-libtool)
Writing uses-localbase.html for sect1(uses-localbase)
Writing uses-lua.html for sect1(uses-lua)
Writing uses-makeinfo.html for sect1(uses-makeinfo)
Writing uses-makeself.html for sect1(uses-makeself)
Writing uses-metaport.html for sect1(uses-metaport)
Writing uses-mono.html for sect1(uses-mono)
Writing uses-motif.html for sect1(uses-motif)
Writing uses-ncurses.html for sect1(uses-ncurses)
Writing uses-ninja.html for sect1(uses-ninja)
Writing uses-objc.html for sect1(uses-objc)
Writing uses-openal.html for sect1(uses-openal)
Writing uses-pathfix.html for sect1(uses-pathfix)
Writing uses-pear.html for sect1(uses-pear)
Writing uses-perl5.html for sect1(uses-perl5)
Writing uses-pgsql.html for sect1(uses-pgsql)
Writing uses-pkgconfig.html for sect1(uses-pkgconfig)
Writing uses-pure.html for sect1(uses-pure)
Writing uses-python.html for sect1(uses-python)
Writing uses-qmail.html for sect1(uses-qmail)
Writing uses-qmake.html for sect1(uses-qmake)
Writing uses-readline.html for sect1(uses-readline)
Writing uses-scons.html for sect1(uses-scons)
Writing uses-shared-mime-info.html for sect1(uses-shared-mime-info)
Writing uses-shebangfix.html for sect1(uses-shebangfix)
Writing uses-tar.html for sect1(uses-tar)
Writing uses-tcl.html for sect1(uses-tcl)
Writing uses-terminfo.html for sect1(uses-terminfo)
Writing uses-tk.html for sect1(uses-tk)
Writing uses-twisted.html for sect1(uses-twisted)
Writing uses-uidfix.html for sect1(uses-uidfix)
Writing uses-uniquefiles.html for sect1(uses-uniquefiles)
Writing uses-webplugin.html for sect1(uses-webplugin)
Writing uses-xfce.html for sect1(uses-xfce)
Writing uses-zip.html for sect1(uses-zip)
Writing uses-zope.html for sect1(uses-zope)
Writing uses.html for chapter(uses)
Writing versions.html for chapter(versions)
Writing index.html for book
Writing HTML.manifest
*** Error code 1

Stop.
make: stopped in /usr/local/www/build/head
      150.40 real       634.09 user        36.88 sys

latestrevision.timestamp "2018-07-04 12:50:26" 
latestrevision.committer "jrm"		
latestrevision.number "51957"