AttributeError: NullTranslationsBabel instance has no attribute 'isactive'

[admin]

How to Reproduce

While doing a GET operation on /, Trac issued an internal error.

(please provide additional details here)

Request parameters:

{}

User agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/43.0.2357.124 Safari/537.36

System Information

Trac	1.0
Babel	1.3 (translations unavailable)
Genshi	0.7 (without speedups)
MySQL	server: "5.1.73", client: "5.1.73", thread-safe: 1
MySQLdb	1.2.3c1
Python	2.6.6 (r266:84292, Jan 22 2014, 09:37:14) [GCC 4.4.7 20120313 (Red Hat 4.4.7-4)]
pytz	2010h
setuptools	0.6
jQuery	1.7.2

Enabled Plugins

TracCustomFieldAdmin

0.2.12

Python Traceback

Traceback (most recent call last):
  File "/usr/lib/python2.6/site-packages/Trac-1.0-py2.6.egg/trac/web/main.py", line 497, in _dispatch_request
    dispatcher.dispatch(req)
  File "/usr/lib/python2.6/site-packages/Trac-1.0-py2.6.egg/trac/web/main.py", line 179, in dispatch
    chosen_handler)
  File "/usr/lib/python2.6/site-packages/Trac-1.0-py2.6.egg/trac/web/main.py", line 325, in _pre_process_request
    chosen_handler = filter_.pre_process_request(req, chosen_handler)
  File "/usr/lib/python2.6/site-packages/Trac-1.0-py2.6.egg/trac/versioncontrol/api.py", line 340, in pre_process_request
    if is_default(reponame):
  File "/usr/lib/python2.6/site-packages/Trac-1.0-py2.6.egg/trac/versioncontrol/api.py", line 34, in is_default
    return not reponame or reponame in ('(default)', _('(default)'))
  File "/usr/lib/python2.6/site-packages/Trac-1.0-py2.6.egg/trac/util/translation.py", line 195, in gettext
    if not self.isactive:
  File "/usr/lib/python2.6/site-packages/Trac-1.0-py2.6.egg/trac/util/translation.py", line 190, in __getattr__
    return getattr(self.active, name)
AttributeError: NullTranslationsBabel instance has no attribute 'isactive'

[Jun Omae]

Many duplicates of #11345. Please search tickets befere submitting a new ticket.

[Jun Omae]

That issue has been fixed in Trac 1.0.2. Please upgrade to Trac 1.0.2 or later.