When I try to press 'retry' on http://bugs.python.org/review/25074/ page and send a message server responds with 500 error. Going through the page for viewing diff for concrete file http://bugs.python.org/review/25074/diff/15535/Lib/test/test_asyncio/test_ba... with adding a comment works well.

The behavior is very annoying -- I was forced to write missed message twice.