bzr crashed with KeyError in get(): 'Bazaar-NG Loom branch format 7\n'

[Mohamed IKBEL Boulabiar]

Binary package hint: bzr

got it when trying to merge this
https://code.launchpad.net/~joakim-verona/inkscape/dbus-fixes
into lp:inkscape

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: bzr 2.3.1-1ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
NonfreeKernelModules: wl
Architecture: i386
BzrDebugFlags: set()
BzrVersion: 2.3.1
CommandLine: ['/usr/bin/bzr', 'merge', 'lp:~joakim-verona/inkscape/dbus-fixes']
CrashDb: bzr
Date: Mon May 23 16:53:28 2011
ExecutablePath: /usr/bin/bzr
FileSystemEncoding: UTF-8
InterpreterPath: /usr/bin/python2.7
Locale: fr_FR.utf8
PackageArchitecture: all
Platform: Linux-2.6.38-8-generic-i686-athlon-with-Ubuntu-11.04-natty
ProcCmdline: /usr/bin/python /usr/bin/bzr merge lp:~joakim-verona/inkscape/dbus-fixes
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, user)
 LANG=fr_FR.utf8
 LANGUAGE=fr_FR:ar:en_US:en_AU:en_CA:en
PythonVersion: 2.7.1
SourcePackage: bzr
Title: bzr crashed with KeyError in get(): 'Bazaar-NG Loom branch format 7\n'
UpgradeStatus: Upgraded to natty on 2011-04-20 (33 days ago)
UserEncoding: UTF-8
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Jelmer Vernooij (jelmer)]

You need to have the bzr-loom plugin installed to access that particular branch.

Arguably, the error message from bzr should be clearer.