bzr crashed with IndexError in dir_grep(): list index out of range

[Steve Beattie]

Attempting to search a branch of lp:qa-regression-testing via 'bzr grep --color auto -v dpkg_compare_versions -r -1' gave me this crash.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: bzr 2.3.4-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-11.47-server 2.6.38.8
Uname: Linux 2.6.38-11-server x86_64
Architecture: amd64
BzrDebugFlags: set()
BzrVersion: 2.3.4
CrashDb: bzr
Date: Wed Aug 3 22:08:05 2011
ExecutablePath: /usr/bin/bzr
FileSystemEncoding: UTF-8
InstallationMedia: Ubuntu-Server 11.04 "Natty Narwhal" - Release amd64 (20110426)
InterpreterPath: /usr/bin/python2.7
Locale: en_US.UTF-8
PackageArchitecture: all
Platform: Linux-2.6.38-11-server-x86_64-with-Ubuntu-11.04-natty
ProcCmdline: /usr/bin/python /usr/bin/bzr grep --color auto -v dpkg_compare_versions -r -1
ProcEnviron:
 SHELL=/bin/bash
 LANG=en_US.UTF-8
PythonVersion: 2.7.1
SourcePackage: bzr
Title: bzr crashed with IndexError in dir_grep(): list index out of range
UpgradeStatus: No upgrade log present (probably fresh install)
UserEncoding: UTF-8
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare