mercurial 3.0.1 update fails

[mkae (Marko Käning)]

Mercurial update fails for me on OSX 10.9.3:

...
creating mercurial/locale/el
creating mercurial/locale/el/LC_MESSAGES
generating mercurial/locale/el/LC_MESSAGES/hg.mo from i18n/el.po
msgfmt -v -o mercurial/locale/el/LC_MESSAGES/hg.mo i18n/el.po -c
i18n/el.po:7: warning: header field 'Language' missing in header
msgfmt: found 1 fatal error
312 translated messages, 35 fuzzy translations, 1936 untranslated messages.
error: command 'msgfmt' failed with exit status 1
make: *** [build] Error 1
make: *** Waiting for unfinished jobs....
mv hg.1.gendoc.txt.tmp hg.1.gendoc.txt
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7 runrst hgmanpage  --halt warning \
	  --strip-elements-with-class htmlonly hg.1.txt hg.1
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7 runrst html  --halt warning \
	  --link-stylesheet --stylesheet-path style.css hg.1.txt hg.1.html
make[1]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_mercurial/mercurial/work/3.0.1/doc'
make: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_mercurial/mercurial/work/3.0.1'
Command failed:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_mercurial/mercurial/work/3.0.1" && make -j8 -w all PYTHON=/opt/local/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7 
Exit code: 2
Error: org.macports.build for port mercurial returned: command execution failed
DEBUG: Error code: CHILDSTATUS 1091 2
DEBUG: Backtrace: command execution failed
Warning: targets not executed for mercurial: org.macports.install org.macports.build org.macports.destroot