TypeError in prefetch() when trying to push branch to a remote location

[Jeff Lane ]

bladernr@galactica:~/development/trunks/maas-cert-server$ bzr push --create-prefix sftp://10.55.61.195/~/maas-cert-server
bzr: ERROR: exceptions.TypeError: prefetch() takes exactly 2 arguments (1 given)

Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 930, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 1121, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 673, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 697, in run
    return self._operation.run_simple(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/bzrlib/cleanup.py", line 136, in run_simple
    self.cleanups, self.func, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/bzrlib/cleanup.py", line 166, in _do_with_cleanups
    result = func(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/bzrlib/builtins.py", line 1393, in run
    use_existing_dir=use_existing_dir, no_tree=no_tree)
  File "/usr/lib/python2.7/dist-packages/bzrlib/push.py", line 94, in _show_push_branch
    no_tree=no_tree)
  File "/usr/lib/python2.7/dist-packages/bzrlib/branch.py", line 1415, in create_clone_on_transport
    no_tree=no_tree)
  File "/usr/lib/python2.7/dist-packages/bzrlib/bzrdir.py", line 195, in clone_on_transport
    make_working_trees=make_working_trees, shared_repo=want_shared)
  File "/usr/lib/python2.7/dist-packages/bzrlib/bzrdir.py", line 1407, in initialize_on_transport_ex
    result = self.initialize_on_transport(transport)
  File "/usr/lib/python2.7/dist-packages/bzrlib/bzrdir.py", line 1321, in initialize_on_transport
    return self._initialize_on_transport_vfs(transport)
  File "/usr/lib/python2.7/dist-packages/bzrlib/bzrdir.py", line 1463, in _initialize_on_transport_vfs
    control_files.lock_write()
  File "/usr/lib/python2.7/dist-packages/bzrlib/lockable_files.py", line 164, in lock_write
    token_from_lock = self._lock.lock_write(token=token)
  File "/usr/lib/python2.7/dist-packages/bzrlib/lockdir.py", line 674, in lock_write
    return self.wait_lock()
  File "/usr/lib/python2.7/dist-packages/bzrlib/lockdir.py", line 603, in wait_lock
    return self.attempt_lock()
  File "/usr/lib/python2.7/dist-packages/bzrlib/lockdir.py", line 552, in attempt_lock
    result = self._attempt_lock()
  File "/usr/lib/python2.7/dist-packages/bzrlib/lockdir.py", line 271, in _attempt_lock
    info = self.peek()
  File "/usr/lib/python2.7/dist-packages/bzrlib/lockdir.py", line 531, in peek
    info = self._read_info_file(self._held_info_path)
  File "/usr/lib/python2.7/dist-packages/bzrlib/lockdir.py", line 521, in _read_info_file
    self.transport.get_bytes(path))
  File "/usr/lib/python2.7/dist-packages/bzrlib/transport/sftp.py", line 422, in get_bytes
    f = self.get(relpath)
  File "/usr/lib/python2.7/dist-packages/bzrlib/transport/sftp.py", line 414, in get
    f.prefetch()
TypeError: prefetch() takes exactly 2 arguments (1 given)

bzr 2.7.0 on python 2.7.11 (Linux-4.4.0-22-generic-x86_64-with-
    Ubuntu-16.04-xenial)
arguments: ['/usr/bin/bzr', 'push', '--create-prefix', 'sftp://10.55.61.195
    /~/maas-cert-server']
plugins: bash_completion[2.7.0], builddeb[2.8.6], builder[0.7.3],
    changelog_merge[2.7.0], grep[2.7.0], launchpad[2.7.0],
    netrc_credential_store[2.7.0], news_merge[2.7.0], po_merge[2.7.0],
    weave_fmt[2.7.0]
encoding: 'utf-8', fsenc: 'UTF-8', lang: 'en_US.UTF-8'

*** Bazaar has encountered an internal error. This probably indicates a
    bug in Bazaar. You can help us fix it by filing a bug report at
        https://bugs.launchpad.net/bzr/+filebug
    including this traceback and a description of the problem.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: bzr 2.7.0-2ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-22.39-generic 4.4.8
Uname: Linux 4.4.0-22-generic x86_64
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
CurrentDesktop: Unity
Date: Tue May 24 17:56:52 2016
InstallationDate: Installed on 2016-02-11 (103 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160210)
PackageArchitecture: all
SourcePackage: bzr
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.