TypeError: unsupported operand type(s) for +: 'NoneType' and 'str'

[harsha.raj@…]

How to Reproduce

While doing a POST operation on /admin/general/svnpolicies, Trac issued an internal error.

(please provide additional details here)

Request parameters:

{'__FORM_TOKEN': u'0b849d82b02e21c1c58f8d06',
 'cat_id': u'general',
 'commands.enabled': u'true',
 'email.attachment_limit': u'10000',
 'email.list': u'harsha.raj@zymesolutions.com',
 'email.prefix': u'[PROJECT NAME]',
 'email_from_address': u'',
 'log_message.minimum': u'3',
 'log_message.pattern': u'',
 'panel_id': u'svnpolicies',
 'path_info': None,
 'svnpolicies_enabled': u'true'}

User Agent was: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1) Gecko/20090624 Firefox/3.5 (.NET CLR 3.5.30729)

System Information

Trac	0.12multirepos-r8955
Python	2.6.4 (r264:75706, Dec 7 2009, 18:45:15) [GCC 4.4.1]
setuptools	0.6c11
SQLite	3.6.16
pysqlite	2.5.5
Genshi	0.6dev-r1092
Babel	-
RPC	1.0.6
jQuery:	1.3.2

Python Traceback

Traceback (most recent call last):
  File "build/bdist.linux-i686/egg/trac/web/main.py", line 494, in _dispatch_request
    dispatcher.dispatch(req)
  File "build/bdist.linux-i686/egg/trac/web/main.py", line 226, in dispatch
    resp = chosen_handler.process_request(req)
  File "build/bdist.linux-i686/egg/trac/admin/web_ui.py", line 132, in process_request
    path_info)
  File "build/bdist.linux-i686/egg/svnpolicies/admin.py", line 189, in render_admin_panel
    self._process_new_settings(req)
  File "build/bdist.linux-i686/egg/svnpolicies/admin.py", line 245, in _process_new_settings
    self._delete_hook_links('post-commit')
  File "build/bdist.linux-i686/egg/svnpolicies/admin.py", line 529, in _delete_hook_links
    svn_hook= svn_repository + os.path.sep + link_name
TypeError: unsupported operand type(s) for +: 'NoneType' and 'str'

[Remy Blank]

PluginIssue (svnpolicies).