'diff' causes a crash with mastertickets plugin enabled.

[anonymous]

Hi, To reproduce:

• Change the description for a ticket and then submit it.
• In the change history you will see something like "description modified (diff)"
• click on diff
• crash *

log Python Traceback

Most recent call last:
File "c:\program files\bitnami trac stack\trac\lib\site-packages\Trac-0.11.6-py2.5.egg\trac\web\main.py", line 450, in _dispatch_request
  dispatcher.dispatch(req)
File "c:\program files\bitnami trac stack\trac\lib\site-packages\Trac-0.11.6-py2.5.egg\trac\web\main.py", line 217, in dispatch
  self._post_process_request(req, *resp)
File "c:\program files\bitnami trac stack\trac\lib\site-packages\Trac-0.11.6-py2.5.egg\trac\web\main.py", line 309, in _post_process_request
  resp = f.post_process_request(req, *resp)
File "build\bdist.win32\egg\mastertickets\web_ui.py", line 64, in post_process_request


System Information:

User Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.3 (KHTML, like Gecko) Chrome/6.0.472.63 Safari/534.3

Trac:	0.11.6
Python:	2.5.4 (r254:67916, Dec 23 2008, 15:10:54) [MSC v.1310 32 bit (Intel)]
setuptools:	0.6c11
SQLite:	3.6.11
pysqlite:	2.5.5
Genshi:	0.5.1
mod_python:	3.3.1
RPC:	1.1.0
jQuery:	1.2.6

If you disable the master tickets plugin, there is no problem with the diff!

Hope someone can help!

thanks, Sanjay

[anonymous]

Request parameters:

{'action': u'diff', 'id': u'152'}

System Information

Trac	0.11.7
Python	2.5.2 (r252:60911, Jan 20 2010, 22:05:59) [GCC 4.2.4 (Ubuntu 4.2.4-1ubuntu3)]
setuptools	0.6c8
SQLite	3.4.2
pysqlite	2.4.0
Genshi	0.5
mod_python	3.3.1
Pygments	0.9
Subversion	1.5.1 (r32289)
jQuery:	1.2.6

Python Traceback

Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/trac/web/main.py", line 450, in _dispatch_request
    dispatcher.dispatch(req)
  File "/usr/lib/python2.5/site-packages/trac/web/main.py", line 217, in dispatch
    self._post_process_request(req, *resp)
  File "/usr/lib/python2.5/site-packages/trac/web/main.py", line 309, in _post_process_request
    resp = f.post_process_request(req, *resp)
  File "/usr/lib/pymodules/python2.5/mastertickets/web_ui.py", line 64, in post_process_request
    for field, field_data in change['fields'].iteritems():
KeyError: 'fields'

Local variables:

Name	Value
change	{'diffs': [], 'old': {'path': 'Ticket #152', 'href': ...
content_type	None
data	{'comment': None, 'longcol': , 'new_version': 1, 'num_changes': 1, ...
links	<mastertickets.model.TicketLinks #152 blocking=[] blocked_by=[]>
req	<Request "GET u'/ticket/152'">
self	<mastertickets.web_ui.MasterTicketsModule object at 0x933922c>
template	'diff_view.html'
tkt	<trac.ticket.model.Ticket object at 0x84d022c>

There is Exception in trac.log, just before this 'fields' key error:

2010-10-03 12:02:17,617 Trac[main] ERROR: Exception caught while post-processing request:  
Traceback (most recent call last): 
  File "/usr/lib/python2.5/site-packages/trac/web/main.py", line 239, in dispatch 
    self._post_process_request(req) 
  File "/usr/lib/python2.5/site-packages/trac/web/main.py", line 311, in _post_process_request 
    f.post_process_request(req, *(None,)*extra_arg_count) 
  File "/usr/lib/pymodules/python2.5/mastertickets/web_ui.py", line 44, in post_process_request 
    tkt = data['ticket] 
TypeError: 'NoneType' object is unsubscriptable 

[Sergey Chernikov]

I can confirm the same issue with the following configuration:

Trac 	0.12
Babel 	0.9.5
Docutils 	0.7
Genshi 	0.6
mod_python 	3.3.1
psycopg2 	2.2.2
Pygments 	1.3.1
Python 	2.6.6 (r266:84292, Sep 12 2010, 18:08:38) [GCC 4.2.1 20070719 [FreeBSD]]
pytz 	2010o
setuptools 	0.6c11
SilverCity 	0.9.7
Subversion 	1.6.15 (r1038135)
jQuery	1.4.2

Plugin version is 3.0.1, db backend is PostgreSQL 8.4.5.