KeyError: 'fields'

[Jonathan Turkanis]

This appears to be essentially the same problem as #3344.

When I attempt to view a ticket description diff, I get:

Trac detected an internal error:
KeyError: 'fields'

Python Traceback
Most recent call last:
 File "/usr/lib/python2.4/site-packages/Trac-0.11.4-py2.4.egg/trac/web/main.py", line 435, in _dispatch_request
  dispatcher.dispatch(req)
 File "/usr/lib/python2.4/site-packages/Trac-0.11.4-py2.4.egg/trac/web/main.py", line 216, in dispatch
  template, data, content_type = \
 File "/usr/lib/python2.4/site-packages/Trac-0.11.4-py2.4.egg/trac/web/main.py", line 311, in _post_process_request
  resp = f.post_process_request(req, *resp)
 File "build/bdist.linux-i686/egg/mastertickets/web_ui.py", line 64, in post_process_request

The attached patch fixes the problem. I have borrowed the inserted text from [3988].

[Jonathan Turkanis]

This appears to be a duplicate of #3920, but the patch is different

[Jonathan Turkanis]

Replying to turkanis:

This appears to be a duplicate of #3920, but the patch is different

And #5503

[Frau Boonekamp]

Fixed in MasterTickets 3.0 (for Trac 0.12):

​http://github.com/coderanger/trac-mastertickets/commit/b46dc7e8614bf02a9c35ca14aa17962bc1ee3156