saving changes in ticket gives 'unsubscriptable object' error

[aadis]

I'm trying to save changes to one particular ticket. Whenever I try to save any editing changes for only this ticket, I get the following:

Oops...
Trac detected an internal error:

unsubscriptable object

If you think this really should work and you can reproduce it. Then you should consider to report this problem to the Trac team.

Go to http://trac.edgewall.com/ and create a new ticket where you describe the problem, how to reproduce it. Don't forget to include the python traceback found below.

TracGuide — The Trac User and Administration Guide
Python traceback

Traceback (most recent call last):
  File "/usr/lib/python2.3/site-packages/trac/ModPythonHandler.py", line 194, in handler
    core.dispatch_request(mpr.path_info, args, mpr, env)
  File "/usr/lib/python2.3/site-packages/trac/core.py", line 435, in dispatch_request
    module.run()
  File "/usr/lib/python2.3/site-packages/trac/Module.py", line 44, in run
    self.render()
  File "/usr/lib/python2.3/site-packages/trac/Ticket.py", line 444, in render
    self.save_changes (id)
  File "/usr/lib/python2.3/site-packages/trac/Ticket.py", line 372, in save_changes
    when=now)
  File "/usr/lib/python2.3/site-packages/trac/Ticket.py", line 143, in save_changes
    self['owner'] = cursor.fetchone()[0]
TypeError: unsubscriptable object

I'm running trac 0.8 on Debian Sarge RC2, apache2 with mod_python support.

The particular ticket details are:

sqlite> select * from ticket where id=3;
3|1097681777|1097681777|dicom  server|normal|P2|nitin|tapesh|||0.90|0.90+|new||Implementation Version Name & Class ID should be changed|Dicoms saved by DicomServer should change the following two tags:
0002,0012,Implementation Class UID
0002,0013,Implementation Version Name

Nitin, lets discuss what should we change this to?

- Tapesh|
sqlite>

I can change the ticket details from the SQL backend.

[jcline@…]

I am getting a similar error when trying to update a certain ticket. It looks like mine is looking for a previous owner that no longer exists...

Traceback (most recent call last):
  File "/usr/local/lib/python2.4/site-packages/trac/core.py", line 525, in cgi_start
    real_cgi_start()
  File "/usr/local/lib/python2.4/site-packages/trac/core.py", line 520, in real_cgi_start
    dispatch_request(path_info, args, req, env)
  File "/usr/local/lib/python2.4/site-packages/trac/core.py", line 435, in dispatch_request
    module.run()
  File "/usr/local/lib/python2.4/site-packages/trac/Module.py", line 44, in run
    self.render()
  File "/usr/local/lib/python2.4/site-packages/trac/Ticket.py", line 444, in render
    self.save_changes (id)
  File "/usr/local/lib/python2.4/site-packages/trac/Ticket.py", line 372, in save_changes
    when=now)
  File "/usr/local/lib/python2.4/site-packages/trac/Ticket.py", line 139, in save_changes
    old_owner = cursor.fetchone()[0]
TypeError: unsubscriptable object

[cmlenz]

#1128 has been marked as duplicate of this ticket.

[justus@…]

patch to close ticket

[cmlenz]

#1149 and #1157 have been marked as duplicate of this ticket.

[cmlenz]

Fixed in [1198], ported to 0.8 in [1199].