bzr: ERROR: No module named xml_errors when running 'bzr help commands' or tab-completion

[Aditya V]

Ubuntu 12.04 Beta 1

Whenever I try to run "bzr help commands", I get this error:

bzr: ERROR: No module named xml_errors
You may need to install this Python library separately.

The same thing happens when I try to to tab-completion in gnome-terminal. I don't remember this issue to have happened in previous releases.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: bzr 2.5.0-1ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-15.24-generic 3.2.5
Uname: Linux 3.2.9-kroqernel+ x86_64
ApportVersion: 1.94.1-0ubuntu2
Architecture: amd64
CheckboxSubmission: 7f98738f6663bda1ae1c2900a3a1db71
CheckboxSystem: 577751a334467e78ed04da699e5debc9
Date: Wed Mar 14 12:54:11 2012
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: bzr
UpgradeStatus: Upgraded to precise on 2012-02-11 (32 days ago)

[Wouter van Heyst (larstiq)]

Could you attach the output of `bzr help commands -Derror`? Adding the -Derror will show the underlying traceback which will give us a clue where things are going wrong.

[Jelmer Vernooij (jelmer)]

This is fixed in bzr-xmloutput trunk, it hasn't made its way into the precise package yet.

[Martin Packman (gz)]

Same issue for the windows installers was resolved in bug 921754. For ubuntu, bug 918935 and particularly the ftbfs bug 935047 seem relevant.

[Aditya V (kroq-gar78)]

Wouter van Heyst asked me to post 'bzr help commands -Derror':

bzr: ERROR: exceptions.ImportError: No module named xml_errors

Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 920, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 1131, 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 695, 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/commands.py", line 1148, in ignore_pipe
    result = func(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/bzrlib/builtins.py", line 4819, in run
    bzrlib.help.help(topic)
  File "/usr/lib/python2.7/dist-packages/bzrlib/help.py", line 53, in help
    outfile.write(source.get_help_text(shadowed_terms))
  File "/usr/lib/python2.7/dist-packages/bzrlib/help_topics/__init__.py", line 886, in get_help_text
    result = topic_registry.get_detail(self.topic)
  File "/usr/lib/python2.7/dist-packages/bzrlib/help_topics/__init__.py", line 92, in get_detail
    return obj(topic)
  File "/usr/lib/python2.7/dist-packages/bzrlib/help.py", line 79, in _help_commands_to_text
    shown_commands = [(n, o) for n, o in commands if o.hidden == hidden]
  File "/usr/lib/python2.7/dist-packages/bzrlib/help.py", line 78, in <genexpr>
    commands = ((n, _mod_commands.get_cmd_object(n)) for n in names)
  File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 227, in get_cmd_object
    return _get_cmd_object(cmd_name, plugins_override)
  File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 249, in _get_cmd_object
    cmd = hook(cmd, cmd_name)
  File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 321, in _get_plugin_command
    return plugin_cmds.get(cmd_name)()
  File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 86, in get
    return registry.Registry.get(self, real_name)
  File "/usr/lib/python2.7/dist-packages/bzrlib/registry.py", line 177, in get
    return self._dict[self._get_key_or_default(key)].get_obj()
  File "/usr/lib/python2.7/dist-packages/bzrlib/registry.py", line 74, in get_obj
    self._obj = get_named_object(self._module_name, self._member_name)
  File "/usr/lib/python2.7/dist-packages/bzrlib/pyutils.py", line 51, in get_named_object
    obj = __import__(module_name, {}, {}, from_list)
  File "/home/kroq-gar78/.bazaar/plugins/xmloutput/cmds.py", line 54, in <module>
    class cmd_xmlstatus(commands.Command):
  File "/home/kroq-gar78/.bazaar/plugins/xmloutput/cmds.py", line 107, in cmd_xmlstatus
    def run(self, file_list=None, revision=None, versioned=False, null=False):
  File "/usr/lib/python2.7/dist-packages/bzrlib/lazy_import....

[Aditya V (kroq-gar78)]

Looks like tab-completion works now. Maybe set this to "Fix Released"?

[Aditya V (kroq-gar78)]

Should I set it to "Fix Released"? Auto-complete works perfectly now.

[Rainer Müller (raimue)]

The bug still exists in the current release bzr-xmloutput 0.8.8.

[Aditya V (kroq-gar78)]

I was trying to confirm Rainer Müller's statement, but I don't even have the bzr-xmloutput package installed! I ran "dpkg -s bzr-xmloutput | grep Version" to check my computer's version, but it said:

"Package `bzr-xmloutput' is not installed and no info is available."

So I can't confirm that it really does affect 0.8.8. And yes, my auto-complete works...

raimue,
Which Ubuntu version are you using? I'm on 12.04, by the way.

[Trebor Rude (treborrude)]

To expand on Jelmer Vernooij's statement above, this was fixed by the changes to cmds.py in commit 160 of the bzr-xmloutput trunk. Specifically, changing the import of xml_errors from a lazy import to a regular import (and specifying the entire package name).

[W. Prins (wprins)]

Ran into this problem just now trying to get a new bazaar installation (against Python 2.7) working. (Based on bzr-xmloutput 0.8.8. May try grabbing code from head now and see if that helps...)

[W. Prins (wprins)]

OK, replacing the official version 0.8.8 with the latest checkout from head (0.8.9) fixed it for me.