TypeError: 'NoneType' object is unsubscriptable

[vandewie]

How to Reproduce

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

(please provide additional details here)

Request parameters:

{'panel_id': None}

User agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:40.0) Gecko/20100101 Firefox/40.0

System Information

System information not available

Enabled Plugins

Plugin information not available

Python Traceback

Traceback (most recent call last):
  File "/usr/lib/python2.6/site-packages/Trac-0.12.2-py2.6.egg/trac/web/main.py", line 511, in _dispatch_request
    dispatcher.dispatch(req)
  File "/usr/lib/python2.6/site-packages/Trac-0.12.2-py2.6.egg/trac/web/main.py", line 258, in dispatch
    content_type)
  File "/usr/lib/python2.6/site-packages/Trac-0.12.2-py2.6.egg/trac/web/chrome.py", line 868, in render_template
    stream.render(method, doctype=doctype, out=buffer)
  File "/usr/lib/python2.6/site-packages/Genshi-0.6-py2.6.egg/genshi/core.py", line 183, in render
    return encode(generator, method=method, encoding=encoding, out=out)
  File "/usr/lib/python2.6/site-packages/Genshi-0.6-py2.6.egg/genshi/output.py", line 58, in encode
    for chunk in iterator:
  File "/usr/lib/python2.6/site-packages/Genshi-0.6-py2.6.egg/genshi/output.py", line 339, in __call__
    for kind, data, pos in stream:
  File "/usr/lib/python2.6/site-packages/Genshi-0.6-py2.6.egg/genshi/output.py", line 826, in __call__
    for kind, data, pos in stream:
  File "/usr/lib/python2.6/site-packages/Genshi-0.6-py2.6.egg/genshi/output.py", line 670, in __call__
    for kind, data, pos in stream:
  File "/usr/lib/python2.6/site-packages/Genshi-0.6-py2.6.egg/genshi/output.py", line 771, in __call__
    for kind, data, pos in chain(stream, [(None, None, None)]):
  File "/usr/lib/python2.6/site-packages/Genshi-0.6-py2.6.egg/genshi/output.py", line 586, in __call__
    for ev in stream:
  File "/usr/lib/python2.6/site-packages/Genshi-0.6-py2.6.egg/genshi/core.py", line 288, in _ensure
    for event in stream:
  File "/usr/lib/python2.6/site-packages/Genshi-0.6-py2.6.egg/genshi/core.py", line 288, in _ensure
    for event in stream:
  File "/usr/lib/python2.6/site-packages/Trac-0.12.2-py2.6.egg/trac/web/chrome.py", line 981, in _strip_accesskeys
    for kind, data, pos in stream:
  File "/usr/lib/python2.6/site-packages/Genshi-0.6-py2.6.egg/genshi/core.py", line 288, in _ensure
    for event in stream:
  File "/usr/lib/python2.6/site-packages/Trac-0.12.2-py2.6.egg/trac/web/chrome.py", line 970, in _generate
    for kind, data, pos in stream:
  File "/usr/lib/python2.6/site-packages/Genshi-0.6-py2.6.egg/genshi/core.py", line 288, in _ensure
    for event in stream:
  File "/usr/lib/python2.6/site-packages/Genshi-0.6-py2.6.egg/genshi/template/base.py", line 605, in _include
    for event in stream:
  File "/usr/lib/python2.6/site-packages/Genshi-0.6-py2.6.egg/genshi/template/markup.py", line 378, in _match
    ctxt, start=idx + 1, **vars):
  File "/usr/lib/python2.6/site-packages/Genshi-0.6-py2.6.egg/genshi/template/markup.py", line 378, in _match
    ctxt, start=idx + 1, **vars):
  File "/usr/lib/python2.6/site-packages/Genshi-0.6-py2.6.egg/genshi/template/markup.py", line 362, in _match
    content = list(content)
  File "/usr/lib/python2.6/site-packages/Genshi-0.6-py2.6.egg/genshi/template/base.py", line 605, in _include
    for event in stream:
  File "/usr/lib/python2.6/site-packages/Genshi-0.6-py2.6.egg/genshi/template/markup.py", line 327, in _match
    for event in stream:
  File "/usr/lib/python2.6/site-packages/Genshi-0.6-py2.6.egg/genshi/template/markup.py", line 316, in _strip
    event = next()
  File "/usr/lib/python2.6/site-packages/Genshi-0.6-py2.6.egg/genshi/template/base.py", line 585, in _flatten
    stream = _apply_directives(data[1], data[0], ctxt, vars)
  File "/usr/lib/python2.6/site-packages/Genshi-0.6-py2.6.egg/genshi/template/base.py", line 262, in _apply_directives
    stream = directives[0](iter(stream), directives[1:], ctxt, **vars)
  File "/usr/lib/python2.6/site-packages/Genshi-0.6-py2.6.egg/genshi/template/directives.py", line 400, in __call__
    value = _eval_expr(self.expr, ctxt, vars)
  File "/usr/lib/python2.6/site-packages/Genshi-0.6-py2.6.egg/genshi/template/base.py", line 277, in _eval_expr
    retval = expr.evaluate(ctxt)
  File "/usr/lib/python2.6/site-packages/Genshi-0.6-py2.6.egg/genshi/template/eval.py", line 178, in evaluate
    return eval(self.code, _globals, {'__data__': data})
  File "/usr/lib/python2.6/site-packages/Trac-0.12.2-py2.6.egg/trac/templates/layout.html", line 20, in <Expression u"not defined('trac_error_rendering') and 'SEARCH_VIEW' in perm">
    <py:if test="not defined('trac_error_rendering') and 'SEARCH_VIEW' in perm" id="search">
  File "/usr/lib/python2.6/site-packages/Trac-0.12.2-py2.6.egg/trac/perm.py", line 553, in has_permission
    return self._has_permission(action, resource)
  File "/usr/lib/python2.6/site-packages/Trac-0.12.2-py2.6.egg/trac/perm.py", line 567, in _has_permission
    check_permission(action, perm.username, resource, perm)
  File "/usr/lib/python2.6/site-packages/Trac-0.12.2-py2.6.egg/trac/perm.py", line 454, in check_permission
    perm)
  File "/snc/trac/projects/spc/plugins/SNC_authorization.py", line 140, in check_permission
    self.read_access_level(username)
  File "/snc/trac/projects/spc/plugins/SNC_authorization.py", line 50, in read_access_level
    is_site_admin = (row[0] == 1)
TypeError: 'NoneType' object is unsubscriptable

[Jun Omae]

PluginIssue (duplicate of #11192).