TypeError: 'NoneType' object is not iterable

[richard.weiher@…]

Hey guys,

i created some new Ticket-Queries but now i get this error. I read some reports but couldn´t find some helpful information.

How to Reproduce

While doing a GET operation on /report, Trac issued an internal error.

(please provide additional details here)

Request parameters:

{}

User agent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.17 (KHTML, like Gecko) Chrome/24.0.1312.56 Safari/537.17

System Information

Trac	1.0
Babel	0.9.6 (translations unavailable)
FullBlog	0.1.1
Genshi	0.6 (without speedups)
mod_python	3.3.1
pysqlite	2.4.1
Python	2.6 (r26:66714, Feb 21 2009, 02:16:04) [GCC 4.3.2 [gcc-4_3-branch revision 141291]]
setuptools	0.6c11
SQLite	3.7.6.3
Subversion	1.7.8 (r1419691)
jQuery	1.7.2

Enabled Plugins

TracFullBlogPlugin	0.1.1
TracScreenshots	0.8dev
TracSubTicketsPlugin	0.2.0.dev-20130104
TracTags	0.6

Python Traceback

Traceback (most recent call last):
  File "build/bdist.linux-x86_64/egg/trac/web/main.py", line 497, in _dispatch_request
    dispatcher.dispatch(req)
  File "build/bdist.linux-x86_64/egg/trac/web/main.py", line 233, in dispatch
    content_type)
  File "build/bdist.linux-x86_64/egg/trac/web/chrome.py", line 1000, in render_template
    encoding='utf-8')
  File "build/bdist.macosx-10.6-universal/egg/genshi/core.py", line 183, in render
    return encode(generator, method=method, encoding=encoding, out=out)
  File "build/bdist.macosx-10.6-universal/egg/genshi/output.py", line 58, in encode
    for chunk in iterator:
  File "build/bdist.macosx-10.6-universal/egg/genshi/output.py", line 339, in __call__
    for kind, data, pos in stream:
  File "build/bdist.macosx-10.6-universal/egg/genshi/output.py", line 826, in __call__
    for kind, data, pos in stream:
  File "build/bdist.macosx-10.6-universal/egg/genshi/output.py", line 670, in __call__
    for kind, data, pos in stream:
  File "build/bdist.macosx-10.6-universal/egg/genshi/output.py", line 771, in __call__
    for kind, data, pos in chain(stream, [(None, None, None)]):
  File "build/bdist.macosx-10.6-universal/egg/genshi/output.py", line 586, in __call__
    for ev in stream:
  File "build/bdist.macosx-10.6-universal/egg/genshi/core.py", line 288, in _ensure
    for event in stream:
  File "build/bdist.macosx-10.6-universal/egg/genshi/core.py", line 288, in _ensure
    for event in stream:
  File "build/bdist.linux-x86_64/egg/trac/web/chrome.py", line 1137, in _strip_accesskeys
    for kind, data, pos in stream:
  File "build/bdist.macosx-10.6-universal/egg/genshi/core.py", line 288, in _ensure
    for event in stream:
  File "build/bdist.linux-x86_64/egg/trac/web/chrome.py", line 1126, in _generate
    for kind, data, pos in stream:
  File "build/bdist.macosx-10.6-universal/egg/genshi/core.py", line 288, in _ensure
    for event in stream:
  File "build/bdist.macosx-10.6-universal/egg/genshi/template/base.py", line 605, in _include
    for event in stream:
  File "build/bdist.macosx-10.6-universal/egg/genshi/template/markup.py", line 378, in _match
    ctxt, start=idx + 1, **vars):
  File "build/bdist.macosx-10.6-universal/egg/genshi/template/markup.py", line 378, in _match
    ctxt, start=idx + 1, **vars):
  File "build/bdist.macosx-10.6-universal/egg/genshi/template/markup.py", line 327, in _match
    for event in stream:
  File "build/bdist.macosx-10.6-universal/egg/genshi/template/base.py", line 545, in _flatten
    for kind, data, pos in stream:
  File "build/bdist.macosx-10.6-universal/egg/genshi/core.py", line 288, in _ensure
    for event in stream:
  File "build/bdist.macosx-10.6-universal/egg/genshi/path.py", line 588, in _generate
    subevent = next()
  File "build/bdist.macosx-10.6-universal/egg/genshi/template/base.py", line 605, in _include
    for event in stream:
  File "build/bdist.macosx-10.6-universal/egg/genshi/template/markup.py", line 316, in _strip
    event = next()
  File "build/bdist.macosx-10.6-universal/egg/genshi/template/base.py", line 545, in _flatten
    for kind, data, pos in stream:
  File "build/bdist.macosx-10.6-universal/egg/genshi/template/directives.py", line 359, in __call__
    iterable = _eval_expr(self.expr, ctxt, vars)
  File "build/bdist.macosx-10.6-universal/egg/genshi/template/base.py", line 277, in _eval_expr
    retval = expr.evaluate(ctxt)
  File "build/bdist.macosx-10.6-universal/egg/genshi/template/eval.py", line 178, in evaluate
    return eval(self.code, _globals, {'__data__': data})
  File "/TRAC/wirtgen/.egg-cache/Trac-1.0-py2.6.egg-tmp/trac/templates/layout.html", line 55, in <Expression u"iter(chrome.late_links.get('stylesheet'))">
    <py:for each="link in chrome.late_links.get('stylesheet')">
TypeError: 'NoneType' object is not iterable

[Christian Boos]

Duplicate #10892.

1.0.1 is due really soon now, it'll contain the fix as well.