id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	field_blocks	field_dependson	field_seealso
570	AttributeError: 'NoneType' object has no attribute 'repository'	Weldight		"==== Как воспроизвести ====

При выполнении операции GET по `/changeset/current:/mainline`, Trac выдает внутреннюю ошибку.

''(просьба предоставить дополнительные подробности здесь)''

Параметры запроса:
{{{
{'format': u'zip',
 'new': u'current:',
 'new_path': u'/mainline',
 'old_path': u'/'}
}}}

User agent: `Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/32.0.1700.76 Safari/537.36`

==== Системная информация ====
''Системная информация недоступна''

==== Включенные плагины ====
''Информация о плагинах недоступна''

==== Python Traceback ====
{{{
Traceback (most recent call last):
  File ""/usr/lib/python2.7/site-packages/trac/web/main.py"", line 522, in _dispatch_request
    dispatcher.dispatch(req)
  File ""/usr/lib/python2.7/site-packages/trac/web/main.py"", line 243, in dispatch
    resp = chosen_handler.process_request(req)
  File ""/usr/lib/python2.7/site-packages/trac/versioncontrol/web_ui/changeset.py"", line 349, in process_request
    self._render_zip(req, filename, repos, data)
  File ""/usr/lib/python2.7/site-packages/trac/versioncontrol/web_ui/changeset.py"", line 768, in _render_zip
    old_path=data['old_path'], old_rev=data['old_rev']):
  File ""/usr/lib/python2.7/site-packages/tracbzr/backend.py"", line 744, in get_changes
    old_tree = old_branch.repository.revision_tree(old_revid)
AttributeError: 'NoneType' object has no attribute 'repository'
}}}"	defect	closed	major		helenos-web	mainline	worksforme