#15637: TypeError: object of type 'listreverseiterator' has no len()
----------------------------+----------------------------
Reporter: darij | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.1
Component: website/wiki | Keywords: trac
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
----------------------------+----------------------------
==== How to Reproduce ====
While doing a POST operation on `/ticket/15576`, Trac issued an internal
error.
''(please provide additional details here)''
Request parameters:
{{{
{'__EDITOR__1': u'textarea',
'__EDITOR__2': u'textarea',
'__FORM_TOKEN': u'3dd5a53b3fddfbbb88a5a311',
'action': u'leave',
'comment': u'Attention: branch change!\r\n\r\nI\'m a bit surprised that
you changed the definite articles back to the indefinites, so I\'m
suggesting to change them back in my commit. (Also, "the group of degree n
over a ring R" sounds better than "the group over a ring R of degree n" to
my ears.)\r\n\r\nIf my edits are OK to you, please set this to
positive_review. Thanks for your work!',
'field_author': u'',
'field_branch': u'public/ticket/15576',
'field_cc': u'tfeulner',
'field_commit': u'6155cf9ce606b77b6c70c84a106430e9068e15c2',
'field_component': u'group theory',
'field_dependencies': u'',
'field_description': u"As detailed in #14885, it is not healthy for code
to rely on the `__mul__` operation on permutations, since this operation
depends on the `Permutations().global_options()['mul']` variable which can
change at runtime. It is better to use the `left_action_product` and
`right_action_product` methods introduced in #15174 (formerly known as
`_left_to_right_multiply_on_left` and
`_left_to_right_multiply_on_right`).\r\n\r\nMy tests show some dependence
on the `__mul__` method in
`sage/groups/semimonomial_transformations/semimonomial_transformation.pyx`
and
`sage/groups/semimonomial_transformations/semimonomial_transformation_group.py`,
although it might be that only one of these files depends on it and the
other depends on the first file. Unfortunately I don't have time to study
this in detail, as I'd first have to read up on the definitions.",
'field_keywords': u'permutation, semimonomial transformation, groups',
'field_merged': u'',
'field_milestone': u'sage-6.1',
'field_priority': u'major',
'field_reviewer': u'',
'field_stopgaps': u'',
'field_summary': u'Semimonomial transformation groups code is sensitive
to Permutations global options',
'field_type': u'defect',
'field_upstream': u'N/A',
'field_work_issues': u'',
'id': u'15576',
'replyto': u'',
'start_time': u'1388826242393549',
'submit': u'Submit changes',
'view_time': u'1388826242393549'}
}}}
User agent: `Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:26.0) Gecko/20100101
Firefox/26.0`
==== System Information ====
''System information not available''
==== Enabled Plugins ====
''Plugin information not available''
==== Python Traceback ====
{{{
Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/Trac-1.1.2dev-
py2.7.egg/trac/web/main.py", line 497, in _dispatch_request
dispatcher.dispatch(req)
File "/usr/local/lib/python2.7/dist-packages/Trac-1.1.2dev-
py2.7.egg/trac/web/main.py", line 214, in dispatch
resp = chosen_handler.process_request(req)
File "/usr/local/lib/python2.7/dist-packages/Trac-1.1.2dev-
py2.7.egg/trac/ticket/web_ui.py", line 185, in process_request
return self._process_ticket_request(req)
File "/usr/local/lib/python2.7/dist-packages/Trac-1.1.2dev-
py2.7.egg/trac/ticket/web_ui.py", line 623, in _process_ticket_request
valid = self._validate_ticket(req, ticket, not valid) and valid
File "/usr/local/lib/python2.7/dist-packages/Trac-1.1.2dev-
py2.7.egg/trac/ticket/web_ui.py", line 1321, in _validate_ticket
for field, message in manipulator.validate_ticket(req, ticket):
File "/srv/trac/sage_trac/plugins/ticket_branch.py", line 288, in
validate_ticket
return []
TypeError: object of type 'listreverseiterator' has no len()
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/15637>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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