Malformed url raises an exception

[Javier Collado]

When trying to branch my project, I wrongly typed the url and added two forward slashes that shouldn't be there (lp://my-project instead of lp:my-project ). As a result of this mistake I'd have expected to get an error message like "branch not found, please double check the url is correct. Example: <some example here>". However, what I got was a long trace because a KeyError exception was raised.

To reproduce the problem, just run the command below:

$ bzr branch lp://my-project
bzr: ERROR: exceptions.KeyError: u'my-project'

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/builtins.py", line 1438, in run
    from_location)
  File "/usr/lib/python2.7/dist-packages/bzrlib/controldir.py", line 778, in open_tree_or_branch
    controldir = klass.open(location)
  File "/usr/lib/python2.7/dist-packages/bzrlib/controldir.py", line 685, in open
    t = _mod_transport.get_transport(base, possible_transports)
  File "/usr/lib/python2.7/dist-packages/bzrlib/transport/__init__.py", line 1679, in get_transport
    return get_transport_from_url(location_to_url(base), possible_transports)
  File "/usr/lib/python2.7/dist-packages/bzrlib/transport/__init__.py", line 1601, in location_to_url
    location = directories.dereference(location)
  File "/usr/lib/python2.7/dist-packages/bzrlib/directory_service.py", line 65, in dereference
    return service().look_up(name, url)
  File "/usr/lib/python2.7/dist-packages/bzrlib/plugins/launchpad/lp_directory.py", line 68, in look_up
    return self._resolve(url)
  File "/usr/lib/python2.7/dist-packages/bzrlib/plugins/launchpad/lp_directory.py", line 165, in _resolve
    result = self._resolve_locally(path, url, _request_factory)
  File "/usr/lib/python2.7/dist-packages/bzrlib/plugins/launchpad/lp_directory.py", line 77, in _resolve_locally
    base_url = LaunchpadService.LAUNCHPAD_DOMAINS[netloc]
KeyError: u'my-project'