Cannot browse EMPTY mercurial repositories

[anonymous]

TracMercurial plugin shows an error like below when I access a trac with an empty mercurial repository (no changesets at all). If I add a changeset this bug disappears, so most users would not experience it though.

UnboundLocalError: local variable 'created_rev' referenced before assignment

And the traceback is:

File "/usr/local/lib/python2.6/dist-packages/trac/web/main.py", line 511, in _dispatch_request
  dispatcher.dispatch(req)
File "/usr/local/lib/python2.6/dist-packages/trac/web/main.py", line 237, in dispatch
  resp = chosen_handler.process_request(req)
File "/usr/local/lib/python2.6/dist-packages/trac/versioncontrol/web_ui/browser.py", line 371, in process_request
  node = get_existing_node(req, repos, path, rev_or_latest)
File "/usr/local/lib/python2.6/dist-packages/trac/versioncontrol/web_ui/util.py", line 64, in get_existing_node
  return repos.get_node(path, rev) 
File "/usr/local/lib/python2.6/dist-packages/TracMercurial-0.12.0.28dev_r10653-py2.6.egg/tracext/hg/backend.py", line 683, in get_node
  self.changectx(rev))
File "/usr/local/lib/python2.6/dist-packages/TracMercurial-0.12.0.28dev_r10653-py2.6.egg/tracext/hg/backend.py", line 889, in __init__
  self.created_rev = created_rev

also my environment is:

Trac 0.12.2
Genshi 0.6
Mercurial 1.8
mod_wsgi 3.2 (WSGIProcessGroup trac WSGIApplicationGroup %{GLOBAL})
pysqlite 2.4.1
Python 2.6.6 (r266:84292, Sep 15 2010, 16:41:53) [GCC 4.4.5]
setuptools 0.6
SQLite 3.7.2
jQuery 1.4.2

[Christian Boos]

Thanks for the report, I'll fix it.

[Christian Boos]

Fixed in r10657 and r10658.