[Bug 842144] Re: bzr crashed with ValueError in _set_full_version(): Invalid version string '2.0.37+cvs.JCW_PRE2_2037-1'

[Steve Beattie]

While merge-package on oneiric doesn't abort with a backtrace, the
changelog merge results in an empty debian/changelog file:

$ dpkg -l bzr-builddeb | tail -1
ii  bzr-builddeb                       2.7.7                                    bzr plugin for Debian package management
[alyosha apache2]$ bzr info .
Standalone tree (format: 2a)
Location:
  branch root: .

Related branches:
  parent branch: bzr+ssh://bazaar.launchpad.net/%2Bbranch/ubuntu/apache2/
$ bzr st
$ bzr merge-package -v lp:debian/apache2
Most recent Debian version: 2.2.20-1
Packaging branch status: CURRENT
dpkg-mergechangelogs: error: 2.0.37+cvs.JCW_PRE2_2037-1 is not a valid version

Text conflict in debian/control
1 conflicts encountered.
The merge resulted in 1 conflicts. Please resolve these and commit the changes with "bzr commit".
$ cat debian/changelog
$

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https://bugs.launchpad.net/bugs/842144

Title:
  bzr crashed with ValueError in _set_full_version(): Invalid version
  string '2.0.37+cvs.JCW_PRE2_2037-1'

Status in Ubuntu Distributed Development:
  New
Status in “bzr” package in Ubuntu:
  New

Bug description:
  Hi,

  I was attempting to merge lp:debian/apache2 into lp:ubuntu/apache2
  following the steps at http://developer.ubuntu.com/packaging/html/udd-
  merging.html when this crash happened.

  ProblemType: Crash
  DistroRelease: Ubuntu 11.04
  Package: bzr 2.3.4-0ubuntu1
  ProcVersionSignature: Ubuntu 2.6.38-11.48-server 2.6.38.8
  Uname: Linux 2.6.38-11-server x86_64
  Architecture: amd64
  BzrDebugFlags: set()
  BzrVersion: 2.3.4
  CommandLine: ['/usr/bin/bzr', 'merge-package', 'lp:debian/apache2']
  CrashDb: bzr
  Date: Mon Sep  5 14:05:41 2011
  ExecutablePath: /usr/bin/bzr
  FileSystemEncoding: UTF-8
  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 merge-package lp:debian/apache2
  ProcEnviron:
   SHELL=/bin/bash
   PATH=(custom, user)
   LANG=en_US.UTF-8
  PythonVersion: 2.7.1
  SourcePackage: bzr
  Title: bzr crashed with ValueError in _set_full_version(): Invalid version string '2.0.37+cvs.JCW_PRE2_2037-1'
  UpgradeStatus: Upgraded to natty on 2011-03-25 (163 days ago)
  UserEncoding: UTF-8
  UserGroups: adm admin cdrom dialout kvm libvirtd lpadmin plugdev sambashare sbuild

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