Unable to clone source repo

Hi.  I had a copy of the netbeans source cloned, but when when I went to
update it (it was probably a couple of years old), I got an error.  So I
deleted and started again, cloning the main repository according to the
directions.  But I still get an error when cloning

ed@Animal:~/netbeans-src$ hg clone http://hg.netbeans.org/main
destination directory: main
requesting all changes
adding changesets
adding manifests

transaction abort!

rollback completed

** unknown exception encountered, please report by visiting
** https://mercurial-scm.org/wiki/BugTracker
** Python 2.7.12 (default, Jul  1 2016, 15:12:24) [GCC 5.4.0 20160609]
** Mercurial Distributed SCM (version 3.7.3)
** Extensions loaded:
Traceback (most recent call last):
  File "/usr/bin/hg", line 43, in <module>
    mercurial.dispatch.run()
  File "/usr/lib/python2.7/dist-packages/mercurial/dispatch.py", line 54,
in run
    sys.exit((dispatch(request(sys.argv[1:])) or 0) & 255)
  File "/usr/lib/python2.7/dist-packages/mercurial/dispatch.py", line 120,
in dispatch
    ret = _runcatch(req)
  File "/usr/lib/python2.7/dist-packages/mercurial/dispatch.py", line 191,
in _runcatch
    return _dispatch(req)
  File "/usr/lib/python2.7/dist-packages/mercurial/dispatch.py", line 924,
in _dispatch
    cmdpats, cmdoptions)
  File "/usr/lib/python2.7/dist-packages/mercurial/dispatch.py", line 681,
in runcommand
    ret = _runcommand(ui, options, cmd, d)
  File "/usr/lib/python2.7/dist-packages/mercurial/dispatch.py", line 1055,
in _runcommand
    return checkargs()
  File "/usr/lib/python2.7/dist-packages/mercurial/dispatch.py", line 1015,
in checkargs
    return cmdfunc()
  File "/usr/lib/python2.7/dist-packages/mercurial/dispatch.py", line 921,
in <lambda>
    d = lambda: util.checksignature(func)(ui, *args, **cmdoptions)
  File "/usr/lib/python2.7/dist-packages/mercurial/util.py", line 993, in
check
    return func(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/mercurial/commands.py", line 1563,
in clone
    shareopts=opts.get('shareopts'))
  File "/usr/lib/python2.7/dist-packages/mercurial/hg.py", line 595, in
clone
    streamclonerequested=stream)
  File "/usr/lib/python2.7/dist-packages/mercurial/exchange.py", line 1189,
in pull
    _pullchangeset(pullop)
  File "/usr/lib/python2.7/dist-packages/mercurial/exchange.py", line 1386,
in _pullchangeset
    pullop.cgresult = cg.apply(pullop.repo, 'pull', pullop.remote.url())
  File "/usr/lib/python2.7/dist-packages/mercurial/changegroup.py", line
381, in apply
    self._unpackmanifests(repo, revmap, trp, prog, changesets)
  File "/usr/lib/python2.7/dist-packages/mercurial/changegroup.py", line
307, in _unpackmanifests
    repo.manifest.addgroup(self, revmap, trp)
  File "/usr/lib/python2.7/dist-packages/mercurial/revlog.py", line 1636,
in addgroup
    alwayscache=bool(addrevisioncb))
  File "/usr/lib/python2.7/dist-packages/mercurial/revlog.py", line 1458,
in _addrevision
    cachedelta[1])
mpatch.mpatchError: patch cannot be decoded
ed@Animal:~/netbeans-src$ hg version
Mercurial Distributed SCM (version 3.7.3)
(see https://mercurial-scm.org for more information)

Copyright (C) 2005-2016 Matt Mackall and others
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.


Can anyone help me check out the source?

Thanks,
Ed