bzr crashed with AssertionError in seek(): Can't seek backwards

I ran the command "bzr merge-upstream --version 0.8.2-2 http://kde-look.org/CONTENT/content-files/134442-plasma-widget-quickaccess-0.8.2-2.zip" then bzr crashed

ProblemType: Crash
DistroRelease: Ubuntu 13.10
Package: bzr 2.6.0~bzr6574-1ubuntu1
ProcVersionSignature: Ubuntu 3.10.0-2.10-generic 3.10.0
Uname: Linux 3.10.0-2-generic x86_64
ApportVersion: 2.10.2-0ubuntu4
Architecture: amd64
BzrDebugFlags: set()
BzrVersion: 2.6.0dev3
CommandLine:
 ['/usr/bin/bzr',
  'merge-upstream',
  '--version',
  '0.8.2-2',
  'http://kde-look.org/CONTENT/content-files/134442-plasma-widget-quickaccess-0.8.2-2.zip']
CrashDb: bzr
Date: Thu Jul 11 14:50:15 2013
ExecutablePath: /usr/bin/bzr
FileSystemEncoding: UTF-8
InstallationDate: Installed on 2013-05-31 (40 days ago)
InstallationMedia: Xubuntu 13.04 "Raring Ringtail" - Release amd64 (20130423.1)
InterpreterPath: /usr/bin/python2.7
Locale: en_AU.UTF-8
MarkForUpload: True
PackageArchitecture: all
Platform: Linux-3.10.0-2-generic-x86_64-with-Ubuntu-13.10-saucy
ProcCmdline: /usr/bin/python /usr/bin/bzr merge-upstream --version 0.8.2-2 http://kde-look.org/CONTENT/content-files/134442-plasma-widget-quickaccess-0.8.2-2.zip
PythonVersion: 2.7.5
SourcePackage: bzr
Title: bzr crashed with AssertionError in seek(): Can't seek backwards
UpgradeStatus: Upgraded to saucy on 2013-07-06 (4 days ago)
UserEncoding: utf-8
UserGroups: adm autopilot cdrom dip lpadmin plugdev sambashare sudo