Source branch format 7 unsuitable for stacking, using Branch format 7 instead.

[Stuart Bishop]

When pushing a newly converted format 7 branch, I'm being informed that it doesn't support stacking and format 7 is being used instead.

$ bzr --version
Bazaar (bzr) 1.16rc1
  Python interpreter: /usr/bin/python 2.6.2
  Python standard library: /usr/lib/python2.6
  bzrlib: /usr/lib/python2.6/dist-packages/bzrlib
  Bazaar configuration: /home/stub/.bazaar
  Bazaar log file: /home/stub/.bzr.log

Copyright 2005, 2006, 2007, 2008, 2009 Canonical Ltd.
http://bazaar-vcs.org/

bzr comes with ABSOLUTELY NO WARRANTY. bzr is free software, and
you may use, modify and redistribute it under the terms of the GNU
General Public License version 2 or later.

$ bzr info -v timeouts
Repository branch (format: 2a)
Location:
  shared repository: .
  repository branch: timeouts

Related branches:
  public branch: bzr+ssh://bazaar.launchpad.net/~stub/launchpad/timeouts
    push branch: lp:~stub/launchpad/timeouts
  parent branch: /home/stub/.canonical-bzr/launchpad-old/timeouts
  submit branch: /home/stub/.canonical-bzr/launchpad/rocketfuel

Format:
       control: Meta directory format 1
        branch: Branch format 7
    repository: Development repository format - rich roots, group compression and chk inventories

Branch history:
      4466 revisions
      1824 days old
   first revision: Tue 2004-06-22 05:34:14 +0000
  latest revision: Mon 2007-07-16 13:04:12 +0700

Repository:
     61753 revisions

$ cd timeouts
$ hitchhiker lp:~stub/launchpad/timeouts rmtree .bzr
Opened bzr+ssh://bazaar.launchpad.net/%7Estub/launchpad/timeouts/
$ bzr push --use-existing-dir
Using saved push location: lp:~stub/launchpad/timeouts
Source branch format does not support stacking, using format:
  Branch format 7
Using default stacking branch /~launchpad-pqm/launchpad/db-devel at lp-140518039425232:///~stub/launchpad
Created new stacked branch referring to /~launchpad-pqm/launchpad/db-devel.