KeyError: 's'

[lauril]

How to Reproduce

While doing a POST operation on /milestone, Trac issued an internal error.

(please provide additional details here)

Request parameters:

{'__FORM_TOKEN': u'835642a9d0422462ff43283e',
 'action': u'edit',
 'completed': u'on',
 'completeddate': u'Fed 29, 2012 4:00:00 PM',
 'description': u"'''Syfte:'''\r\nEtt f\xf6rsta steg f\xf6r att utv\xe4rdera om ",
 'due': u'on',
 'duedate': u'Dec 17, 2011 6:00:00 PM',
 'id': u'',
 'name': u'Akvik traffik plats'}

User agent: Mozilla/5.0 (Ubuntu; X11; Linux x86_64; rv:8.0) Gecko/20100101 Firefox/8.0

System Information

Trac	0.13dev-r10883
Babel	0.9.4
Docutils	0.6
Genshi	0.6
mod_wsgi	3.2 (WSGIProcessGroup WSGIApplicationGroup %{GLOBAL})
MySQL	server: "5.1.52", client: "5.1.52", thread-safe: 0
MySQLdb	1.2.3c1
Pygments	1.1.1
Python	2.6.5 (r265:79063, Jun 25 2011, 08:36:25) [GCC 4.4.4 20100726 (Red Hat 4.4.4-13)]
setuptools	0.6
Subversion	1.6.11 (r934486)
jQuery	1.5.1

Enabled Plugins

NavAdd	0.1
Trac-jsGantt	0.9-r10876
TracAccountManager	0.3.2
TracListOfWikiPagesMacro	0.4
TracSumStats	0.9.0
WikiTableMacro	0.1-r10442

Python Traceback

Traceback (most recent call last):
  File "/usr/lib/python2.6/site-packages/Trac-0.13dev_r10883-py2.6.egg/trac/web/main.py", line 478, in _dispatch_request
    dispatcher.dispatch(req)
  File "/usr/lib/python2.6/site-packages/Trac-0.13dev_r10883-py2.6.egg/trac/web/main.py", line 198, in dispatch
    resp = chosen_handler.process_request(req)
  File "/usr/lib/python2.6/site-packages/Trac-0.13dev_r10883-py2.6.egg/trac/ticket/roadmap.py", line 679, in process_request
    return self._do_save(req, milestone)
  File "/usr/lib/python2.6/site-packages/Trac-0.13dev_r10883-py2.6.egg/trac/ticket/roadmap.py", line 754, in _do_save
    hint='datetime') if completed else None
  File "/usr/lib/python2.6/site-packages/Trac-0.13dev_r10883-py2.6.egg/trac/util/datefmt.py", line 594, in user_time
    return func(*args, **kwargs)
  File "/usr/lib/python2.6/site-packages/Trac-0.13dev_r10883-py2.6.egg/trac/util/datefmt.py", line 346, in parse_date
    dt = _i18n_parse_date(text, tzinfo, locale)
  File "/usr/lib/python2.6/site-packages/Trac-0.13dev_r10883-py2.6.egg/trac/util/datefmt.py", line 459, in _i18n_parse_date
    month_names, tzinfo)
  File "/usr/lib/python2.6/site-packages/Trac-0.13dev_r10883-py2.6.egg/trac/util/datefmt.py", line 478, in _i18n_parse_date_0
    matches.insert(order['s'], 0)
KeyError: 's'

[Remy Blank]

Mmh… No idea what what's wrong here. Jun?

[Christian Boos]

It's easy to reproduce:

>>> from trac.util.datefmt import *
>>> parse_date("Fed 29, 2012 4:00:00 PM", locale='en_US')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "trac\util\datefmt.py", line 346, in parse_date
    dt = _i18n_parse_date(text, tzinfo, locale)
  File "trac\util\datefmt.py", line 459, in _i18n_parse_date
    month_names, tzinfo)
  File "trac\util\datefmt.py", line 478, in _i18n_parse_date_0
    matches.insert(order['s'], 0)
KeyError: 's'

Adding a print(repr((matches, order))) just before the order['s'] line shows:

(['29', '2012', '4', '00', '00'], {'M': 1, 'd': 0, 'h': 3, 'm': 4, 's': 5, 'y': 2})
(['29', '2012', '4', '00', '00'], {'y': 2, 'M': 1, 'd': 0})

which suggests that for a locale there can be a date+time and date only patterns. The if len(matches) == 5 check (which I suspect is there to cope with a date+time spec where the seconds are missing) will not work for date only patterns. Note that here we have seconds, but as "Fed" is not recognized as a month, the date+time pattern will not match and the date only is then tried and fails. There are also other ways to trigger the error, like with parse_date("2012 29 4:00 Feb", locale='en_US').

Suggested fix:

trac/util/datefmt.py

@@ -474 +474 @@
             del matches[idx]
             break
 
-    if len(matches) == 5:
+    # for date+time patterns, use 0 seconds if seconds are missing
+    if len(matches) == 5 and 's' in order:
         matches.insert(order['s'], 0)
 
     values = {}

Leaving final fix and say on the matter (and extra unit-tests) for Jun ;-)

[Jun Omae]

Thanks, Christian :)

I'll work at this evening.

[Jun Omae]

Fixed in [10891] and added unit tests. Thanks for the report.