id,summary,reporter,owner,description,type,status,priority,component,severity,resolution,keywords,cc,release
10886,TypeError: unsupported operand type(s) for +: 'NoneType' and 'NoneType',voznesensky@rts.ru,,==== How to Reproduce ====\r\nCommit a simple update in git submodule and try to view the change in trac.\r\n==== Python Traceback ====\r\n{{{\r\nMost recent call last:\r\n\r\nFile "/usr/lib/python2.7/dist-packages/trac/web/main.py"_ line 522_ in _dispatch_request\r\n  dispatcher.dispatch(req)\r\nFile "/usr/lib/python2.7/dist-packages/trac/web/main.py"_ line 243_ in dispatch\r\n  resp = chosen_handler.process_request(req)\r\nFile "/usr/lib/python2.7/dist-packages/trac/versioncontrol/web_ui/changeset.py"_ line 352_ in process_request\r\n  self._render_html(req_ repos_ chgset_ restricted_ xhr_ data)\r\nFile "/usr/lib/python2.7/dist-packages/trac/versioncontrol/web_ui/changeset.py"_ line 586_ in _render_html\r\n  diff_bytes += _estimate_changes(old_node_ new_node)\r\nFile "/usr/lib/python2.7/dist-packages/trac/versioncontrol/web_ui/changeset.py"_ line 537_ in _estimate_changes\r\n  return old_size + new_size\r\n}}},defect,closed,normal,SELECT A HACK,normal,duplicate,,,