bzr crashed with KeyError in __getitem__(): 'from'

This error appeared after running "bzr git-apply"

ProblemType: Crash
DistroRelease: Ubuntu 14.04
Package: bzr 2.6.0+bzr6591-1ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-17.37-generic 3.13.6
Uname: Linux 3.13.0-17-generic x86_64
ApportVersion: 2.13.3-0ubuntu1
Architecture: amd64
BzrDebugFlags: set([])
BzrVersion: 2.7.0dev1
CommandLine:
 ['/usr/bin/bzr',
  'git-apply',
  '../debian/patches/fix-cursor-gnomedesktop-api.patch']
CrashDb: bzr
CurrentDesktop: XFCE
Date: Sat Mar 15 18:53:41 2014
ExecutablePath: /usr/bin/bzr
FileSystemEncoding: UTF-8
InstallationDate: Installed on 2013-12-17 (87 days ago)
InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20131217)
InterpreterPath: /usr/bin/python2.7
Locale: en_AU.UTF-8
PackageArchitecture: all
Platform: Linux-3.13.0-17-generic-x86_64-with-Ubuntu-14.04-trusty
ProcCmdline: /usr/bin/python /usr/bin/bzr git-apply ../debian/patches/fix-cursor-gnomedesktop-api.patch
PythonVersion: 2.7.6
SourcePackage: bzr
Title: bzr crashed with KeyError in __getitem__(): 'from'
UpgradeStatus: No upgrade log present (probably fresh install)
UserEncoding: utf-8
UserGroups: adm autopilot cdrom dip lpadmin plugdev sambashare sudo

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/plugins/git/commands.py", line 294, in run
    self._apply_patch(tree, f, signoff=signoff)
  File "/usr/lib/python2.7/dist-packages/bzrlib/plugins/git/commands.py", line 265, in _apply_patch
    (c, diff, version) = git_am_patch_split(f)
  File "/usr/lib/python2.7/dist-packages/dulwich/patch.py", line 250, in git_am_patch_split
    c.author = msg["from"]
  File "/usr/lib/python2.7/rfc822.py", line 388, in __getitem__
    return self.dict[name.lower()]
KeyError: 'from'