KeyError: 'attachment[]'

[asmaa.mohamed]

How to Reproduce

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

after i install AwesomeAttachmentsPlugin

Request parameters:

{'__FORM_TOKEN': u'b8f6429dd469a654b97423c8',
 'attachment': u'on',
 'field_admin_build': u'64',
 'field_agent_build': u'15',
 'field_appserver_build': u'80',
 'field_cause': u'Requirement Error',
 'field_cc': u'',
 'field_component': u'EMS-Installer',
 'field_description': u'',
 'field_developer': u'Fady Angelo',
 'field_epay_build': u'5',
 'field_keywords': u'',
 'field_osm_build': u'11',
 'field_owner': u'',
 'field_reporter': u'asmaa.mohamed',
 'field_severity': u'major',
 'field_summary': u'3333',
 'field_type': u'Bug',
 'field_version': u'1.0',
 'submit': u'Create ticket'}

System Information

Trac	0.11.7
Python	2.7 (r27:82500, Oct 30 2011, 08:42:15) [GCC 4.1.2 20080704 (Red Hat 4.1.2-51)]
setuptools	0.6c11
MySQL	server: "5.5.17-cll", client: "5.1.59", thread-safe: 0
MySQLdb	1.2.3
Genshi	0.6
mod_wsgi	3.2 (WSGIProcessGroup WSGIApplicationGroup %{GLOBAL})
CustomFieldAdmin	0.2.6-r10460

Python Traceback

Traceback (most recent call last):
  File "/opt/python2.7/lib/python2.7/site-packages/Trac-0.11.7-py2.7.egg/trac/web/main.py", line 450, in _dispatch_request
    dispatcher.dispatch(req)
  File "/opt/python2.7/lib/python2.7/site-packages/Trac-0.11.7-py2.7.egg/trac/web/main.py", line 206, in dispatch
    resp = chosen_handler.process_request(req)
  File "/opt/python2.7/lib/python2.7/site-packages/Trac-0.11.7-py2.7.egg/trac/ticket/web_ui.py", line 183, in process_request
    return self._process_newticket_request(req)
  File "/opt/python2.7/lib/python2.7/site-packages/Trac-0.11.7-py2.7.egg/trac/ticket/web_ui.py", line 399, in _process_newticket_request
    self._do_create(req, ticket) # (redirected if successful)
  File "build/bdist.linux-x86_64/egg/awesome/awesomattachments.py", line 101, in _do_create
    if(isinstance(req.args['attachment[]'], list)):
KeyError: 'attachment[]'

[Jun Omae]

PluginIssue (​th:AwesomeAttachmentsPlugin). It seems that it is the same as ​th:#9071.