TypeError: unsupported operand type s for : NoneType and NoneType

[dmarti]

How to Reproduce While doing a GET operation on /changeset/26e036576133f07b15eeb4363bf993b67bf9eacb/tp, Trac issued an internal error.

This only happens for a changeset that only updates git submodules, for which "get_content_length" returns None (because there is no associated git blob).

(The Python error is "unsupported operand type(s) for +")

This is similar to the old ticket #3287 here.

Request parameters: { new : u 26e036576133f07b15eeb4363bf993b67bf9eacb , new_path : u /tp } User agent: Mozilla/5.0 X11; U; Linux x86_64; en-US; rv:1.9.2.17 Gecko/20110428 Fedora/3.6.17-1.fc14 Firefox/3.6.17 System Information

Trac

0.12.1

Docutils

0.7

Genshi

0.6

GIT

1.7.3.4

psycopg2

2.2.2

Pygments

1.3.1

Python

2.6.6 r266:84292, Mar 6 2011, 17:53:48 br GCC 4.3.4

pytz

2010o

setuptools

0.6

Subversion

1.6.16 r1073529

jQuery

1.4.2

Enabled Plugins

BatchModify

0.8.0-trac0.12

FilteredTicketQuery

N/A

timingandestimationplugin

1.0.6

TracGit

0.12.0.6dev

Python Traceback Traceback most recent call last : File /usr/lib64/python2.6/site-packages/trac/web/main.py , line 511, in _dispatch_request dispatcher.dispatch req File /usr/lib64/python2.6/site-packages/trac/web/main.py , line 237, in dispatch resp chosen_handler.process_request req File /usr/lib64/python2.6/site-packages/trac/versioncontrol/web_ui/changeset.py , line 352, in process_request self._render_html req, repos, chgset, restricted, xhr, data File /usr/lib64/python2.6/site-packages/trac/versioncontrol/web_ui/changeset.py , line 586, in _render_html diff_bytes _estimate_changes old_node, new_node File /usr/lib64/python2.6/site-packages/trac/versioncontrol/web_ui/changeset.py , line 537, in _estimate_changes return old_size new_size TypeError: unsupported operand type s for : NoneType and NoneType