error starting webbrowser.GenericBrowser in python2.4

[Sergey Petrunia]

bzr visualize command fails on suse 10.1. It doesn't display any window but instead shows the below message and exits

$ bzr visualize
bzr: ERROR: exceptions.ValueError: need more than 1 value to unpack

Traceback (most recent call last):
  File "/usr/lib/python2.4/site-packages/bzrlib/commands.py", line 846, in run_bzr_catch_errors
    return run_bzr(argv)
  File "/usr/lib/python2.4/site-packages/bzrlib/commands.py", line 797, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.4/site-packages/bzrlib/commands.py", line 499, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/home/user/.bazaar/plugins/gtk/__init__.py", line 266, in run
    pp = start_viz_window(br, revids, limit)
  File "/home/user/.bazaar/plugins/gtk/__init__.py", line 234, in start_viz_window
    from viz import BranchWindow
  File "/home/user/.bazaar/plugins/gtk/viz/__init__.py", line 14, in ?
    from branchwin import BranchWindow
  File "/home/user/.bazaar/plugins/gtk/viz/branchwin.py", line 18, in ?
    from bzrlib.plugins.gtk.tags import AddTagDialog
  File "/home/user/.bazaar/plugins/gtk/tags.py", line 27, in ?
    from bzrlib.plugins.gtk.revisionview import RevisionView
  File "/home/user/.bazaar/plugins/gtk/revisionview.py", line 41, in ?
    webbrowser.register('sensible-browser', None, webbrowser.GenericBrowser('sensible-browser'), -1)
  File "/usr/lib/python2.4/webbrowser.py", line 97, in __init__
    self.name, self.args = cmd.split(None, 1)
ValueError: need more than 1 value to unpack

bzr 1.5 on python 2.4.2 (linux2)
arguments: ['/usr/bin/bzr', 'visualize']
encoding: 'UTF-8', fsenc: 'UTF-8', lang: 'en_US.UTF-8'
plugins:
  difftools /home/user/.bazaar/plugins/difftools [0.91.0]
  extmerge /home/user/.bazaar/plugins/extmerge [unknown]
  gtk /home/user/.bazaar/plugins/gtk [0.95.0dev1]
  launchpad /usr/lib/python2.4/site-packages/bzrlib/plugins/launchpad [unknown]
  mysql /home/user/.bazaar/plugins/mysql [0.3.7]
*** Bazaar has encountered an internal error.
    Please report a bug at https://bugs.launchpad.net/bzr/+filebug
    including this traceback, and a description of what you
    were doing when the error occurred.

$

The output of bzr --version is included above. Contents of ~/.bzr.log as follows:
this is a debug log for diagnosing/reporting problems in bzr
you can delete or truncate this file, or include sections in
bug reports to https://bugs.launchpad.net/bzr/+filebug

0.150 encoding stdout as sys.stdout encoding 'UTF-8'
0.151 bzr arguments: [u'visualize']
0.151 looking for plugins in /home/user/.bazaar/plugins
0.212 importmbox not available unless bzrtools is installed
0.253 looking for plugins in /usr/lib/python2.4/site-packages/bzrlib/plugins
0.253 Plugin name gtk already loaded
0.253 Plugin name __init__ already loaded
0.253 Plugin name __init__ already loaded
0.258 encoding stdout as sys.stdout encoding 'UTF-8'
0.633 WARNING: using slower ElementTree; consider installing cElementTree and make sure it's on your PYTHONPATH
0.673 Traceback (most recent call last):
  File "/usr/lib/python2.4/site-packages/bzrlib/commands.py", line 846, in run_bzr_catch_errors
    return run_bzr(argv)
  File "/usr/lib/python2.4/site-packages/bzrlib/commands.py", line 797, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.4/site-packages/bzrlib/commands.py", line 499, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/home/user/.bazaar/plugins/gtk/__init__.py", line 266, in run
    pp = start_viz_window(br, revids, limit)
  File "/home/user/.bazaar/plugins/gtk/__init__.py", line 234, in start_viz_window
    from viz import BranchWindow
  File "/home/user/.bazaar/plugins/gtk/viz/__init__.py", line 14, in ?
    from branchwin import BranchWindow
  File "/home/user/.bazaar/plugins/gtk/viz/branchwin.py", line 18, in ?
    from bzrlib.plugins.gtk.tags import AddTagDialog
  File "/home/user/.bazaar/plugins/gtk/tags.py", line 27, in ?
    from bzrlib.plugins.gtk.revisionview import RevisionView
  File "/home/user/.bazaar/plugins/gtk/revisionview.py", line 41, in ?
    webbrowser.register('sensible-browser', None, webbrowser.GenericBrowser('sensible-browser'), -1)
  File "/usr/lib/python2.4/webbrowser.py", line 97, in __init__
    self.name, self.args = cmd.split(None, 1)
ValueError: need more than 1 value to unpack

0.675 return code 4

Additional details:
* If I run "bzr gcommit" it works ok - commit window shows up, I'm able to type in comments and it successfully commits
* bzr-gtk was installed using MySQL's standard bzr setup procedure. I also followed the same procedure on openSuse 10.3 and "bzr visualize" works without any problems here. Does bzr-gtk have some hidden dependencies that suse 10.1 doesn't meet but 10.3 does?

[Martin Pool (mbp)]

This bug is in bzr-gtk.

I believe there was recently a change to how the web browser is started; I'm not sure if it would fix this problem.

[Sabin Iacob (iacobs)]

mine... it appears that the python 2.5 webbrowser.register is slightly different from the python 2.4 webbrowser.register