Unable to upgrade OS X tracd 0.11.7 database

[Sam Halliday]

I get the following exception when attempting to upgrade the TRAC install, with a similar thing when I go to any issue:

$ trac-admin /Users/samuel/Desktop/TRAC/test upgrade

Traceback (most recent call last):
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/bin/trac-admin", line 8, in <module>
    load_entry_point('Trac==0.11.7', 'console_scripts', 'trac-admin')()
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/Trac-0.11.7-py2.7.egg/trac/admin/console.py", line 1321, in run
    return admin.onecmd(command)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/Trac-0.11.7-py2.7.egg/trac/admin/console.py", line 138, in onecmd
    rv = cmd.Cmd.onecmd(self, line) or 0
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/cmd.py", line 221, in onecmd
    return func(arg)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/Trac-0.11.7-py2.7.egg/trac/admin/console.py", line 1154, in do_upgrade
    if not self.__env.needs_upgrade():
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/Trac-0.11.7-py2.7.egg/trac/env.py", line 435, in needs_upgrade
    for participant in self.setup_participants:
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/Trac-0.11.7-py2.7.egg/trac/core.py", line 70, in extensions
    return filter(None, [component.compmgr[cls] for cls in extensions])
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/Trac-0.11.7-py2.7.egg/trac/core.py", line 207, in __getitem__
    component = cls(self)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/Trac-0.11.7-py2.7.egg/trac/core.py", line 111, in maybe_init
    init(self)
  File "build/bdist.macosx-10.8-x86_64/egg/worklog/api.py", line 36, in __init__
AttributeError: 'Environment' object has no attribute 'get_read_db'

[Sam Halliday]

I went back to r10794, 0.11 branch, and this works ok.