Import error in exporter.py - fastimport.helpers

[Ching]

When exporting bzr using fastimport, I have discovered an error:
bzr: ERROR: exceptions.ImportError: cannot import name binary_stream

Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/bzrlib/commands.py", line 930, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/bzrlib/commands.py", line 1121, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.7/site-packages/bzrlib/commands.py", line 673, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib/python2.7/site-packages/bzrlib/commands.py", line 697, in run
    return self._operation.run_simple(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/bzrlib/cleanup.py", line 136, in run_simple
    self.cleanups, self.func, *args, **kwargs)
  File "/usr/lib/python2.7/site-packages/bzrlib/cleanup.py", line 166, in _do_with_cleanups
    result = func(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/bzrlib/plugins/fastimport/cmds.py", line 679, in run
    from bzrlib.plugins.fastimport import exporter
  File "/usr/lib/python2.7/site-packages/bzrlib/plugins/fastimport/exporter.py", line 67, in <module>
    from fastimport.helpers import (
ImportError: cannot import name binary_stream

The relivent lines of code are in bzrlib/plugins/fastimport/exporter.py:
from fastimport.helpers import (
    binary_stream,
    single_plural,
    )

Problem:
binary_stream and single_pural where removed from lb:python-fastimport in revition 327. Relevint commit message:
revno: 327
committer: Jelmer Vernooij <email address hidden>
timestamp: Sat 2014-03-01 15:26:41 +0000
message:
  Remove unused helper

This makes it imposible for me to import/export bzr repos to git using git-bzr-ng.

[Barry Warsaw (barry)]

Any chance we can get a release with the fix for Utopic?

[Jelmer Vernooij (jelmer)]

I've added an Ubuntu component. Note that bzr-fastimport is no longer present in Debian, so it's no longer getting any updates that way.

[Barry Warsaw (barry)]

I'm going to upload the new bzr-fastimport to Utopic, but it will also require a new python-fastimport to update the Breaks. python-fastimport is stuck in utopic-proposed because of this, but this should hopefully unjam everything.

[Launchpad Janitor (janitor)]

This bug was fixed in the package bzr-fastimport - 0.13.0-4ubuntu1

---------------
bzr-fastimport (0.13.0-4ubuntu1) utopic; urgency=medium

  * d/patches/import-binary-stream.patch: Upstream patch to fixes an
    import error due bzr helpers removed from python-fastimport.
    (LP: #1295833)
 -- Barry Warsaw <email address hidden> Fri, 10 Oct 2014 11:05:03 -0400

[Marcos Cardinot (cardinot)]

This bug seems to be back.
- Fedora 25
- bzr-fastimport-0.13.0-8.fc25.noarch

https://bugzilla.redhat.com/show_bug.cgi?id=1409256

[Jelmer Vernooij (jelmer)]

It's not back, but you need a bzr-fastimport snapshot to get the fix. 0.13.0 is too old.