id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	os	architecture	failure	difficulty	testcase	blockedby	blocking	related
5301	"Trac failure: ""KeyError: 'fields'"""	modchan		"
==== How to Reproduce ====

While doing a GET operation on `/ticket/4000`, Trac issued an internal error.

Request parameters:
{{{
{'action': u'diff', 'id': u'4000', 'version': u'3'}
}}}


User Agent was: `Mozilla/5.0 (Windows NT 6.1; WOW64; rv:5.0) Gecko/20100101 Firefox/5.0`

==== System Information ====

|| '''Trac''' || `0.11.6` ||
|| '''Python''' || `2.5.2 (r252:60911, Jan 24 2010, 18:02:01) ` [[br]] `[GCC 4.3.2]` ||
|| '''setuptools''' || `0.6c8` ||
|| '''SQLite''' || `3.5.9` ||
|| '''pysqlite''' || `2.3.2` ||
|| '''Genshi''' || `0.5.1` ||
|| '''mod_python''' || `3.3.1` ||
|| '''Pygments''' || `0.10` ||
|| '''GIT''' || `1.5.6.5` ||
|| '''FullBlog''' || `0.1.1` ||
|| '''RPC''' || `1.0.6` ||
|| '''CustomFieldAdmin''' || `0.2.2` ||
|| '''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 ""build/bdist.linux-x86_64/egg/mastertickets/web_ui.py"", line 64, in post_process_request
    for field, field_data in change['fields'].iteritems():
KeyError: 'fields'

}}}
    "	bug	closed	normal		None	7.0.3	worksforme			Unknown/Multiple	Unknown/Multiple	None/Unknown