Oops…

To that end, you could ==== How to Reproduce ==== While doing a GET operation on `/changeset/821819b10346c57822e89b870d4c8fa19dfa4c2f`, Trac issued an internal error. ''(please provide additional details here)'' Request parameters: {{{ {'new': u'821819b10346c57822e89b870d4c8fa19dfa4c2f'} }}} User agent: `#USER_AGENT#` ==== System Information ==== ''System information not available'' ==== Enabled Plugins ==== ''Plugin information not available'' ==== Interface Customization ==== ''Interface customization information not available'' ==== Python Traceback ==== {{{ Traceback (most recent call last): File "/usr/lib/python2.7/dist-packages/trac/web/main.py", line 613, in _dispatch_request dispatcher.dispatch(req) File "/usr/lib/python2.7/dist-packages/trac/web/main.py", line 253, in dispatch resp = chosen_handler.process_request(req) File "/usr/lib/python2.7/dist-packages/trac/versioncontrol/web_ui/changeset.py", line 351, in process_request self._render_html(req, repos, chgset, restricted, data) File "/usr/lib/python2.7/dist-packages/trac/versioncontrol/web_ui/changeset.py", line 586, in _render_html diff_bytes += _estimate_changes(old_node, new_node) File "/usr/lib/python2.7/dist-packages/trac/versioncontrol/web_ui/changeset.py", line 536, in _estimate_changes return old_size + new_size TypeError: unsupported operand type(s) for +: 'NoneType' and 'NoneType' }}} a ticket.