AttributeError: 'NoneType' object has no attribute 'get_youngest_rev'

[user]

I am getting this error. I tried #13810. But it still gives an error.

How to Reproduce

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

(please provide additional details here)

Request parameters:

{'cat_id': u'versioncontrol', 'panel_id': u'repository', 'path_info': None}

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	1.0.5
Babel	0.9.6
Genshi	0.6 (without speedups)
GIT	1.9.5.msysgit.1
mod_wsgi	3.5 (WSGIProcessGroup WSGIApplicationGroup %{GLOBAL})
pysqlite	2.6.3
Python	2.7.6 (default, Nov 10 2013, 19:24:18) [MSC v.1500 32 bit (Intel)]
setuptools	7.0
SQLite	3.7.6.2
Subversion	1.8.4 (r1534716)
jQuery	1.7.2
jQuery UI	1.8.21
jQuery Timepicker	1.0.1

Enabled Plugins

tracaccountmanager

0.3.2

Python Traceback

Traceback (most recent call last):
  File "build\bdist.win32\egg\trac\web\main.py", line 513, in _dispatch_request
    dispatcher.dispatch(req)
  File "build\bdist.win32\egg\trac\web\main.py", line 222, in dispatch
    resp = chosen_handler.process_request(req)
  File "build\bdist.win32\egg\trac\admin\web_ui.py", line 120, in process_request
    path_info)
  File "build\bdist.win32\egg\trac\versioncontrol\admin.py", line 334, in render_admin_panel
    for (reponame, info) in all_repos.iteritems())
  File "build\bdist.win32\egg\trac\versioncontrol\admin.py", line 334, in <genexpr>
    for (reponame, info) in all_repos.iteritems())
  File "build\bdist.win32\egg\trac\versioncontrol\admin.py", line 356, in _extend_info
    youngest_rev = repos.get_youngest_rev()
AttributeError: 'NoneType' object has no attribute 'get_youngest_rev'