Error saving ticket change

[anonymous]

When trying to submit a change to a ticket I got the error:

int argument required

The trace back is

Traceback (most recent call last):
  File "/usr/local/lib/python2.3/site-packages/trac/web/modpython_frontend.py", line 265, in handler
    dispatch_request(mpr.path_info, mpr, env)
  File "/usr/local/lib/python2.3/site-packages/trac/web/main.py", line 421, in dispatch_request
    dispatcher.dispatch(req)
  File "/usr/local/lib/python2.3/site-packages/trac/web/main.py", line 285, in dispatch
    resp = chosen_handler.process_request(req)
  File "/usr/local/lib/python2.3/site-packages/trac/ticket/web_ui.py", line 206, in process_request
    self._do_save(req, db, ticket)
  File "/usr/local/lib/python2.3/site-packages/trac/ticket/web_ui.py", line 350, in _do_save
    self.log.exception("Failure sending notification on change to "
TypeError: int argument required

I am using [1829]. I have an issue with notification, but I can't see what it is due to this problem.

[Christopher Lenz]

Duplicate of #1579.