ValueError: Invalid boundary in multipart form: ''

[vij2cob]

How to Reproduce

While doing a POST operation on /attachment/ticket/1638/, Trac issued an internal error.

(please provide additional details here)

Request parameters:

{'action': u'new', 'description': u'', 'id': u'1638', 'realm': u'ticket'}

User agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Firefox/38.0; Mozilla Firefox 38.2.0 - 10792--71

System Information

Trac	0.12.2
Docutils	0.9
Genshi	0.6
mod_wsgi	3.3 (WSGIProcessGroup WSGIApplicationGroup %{GLOBAL})
Pygments	1.5
pysqlite	2.6.0
Python	2.7.2 (default, Jun 12 2011, 15:08:59) [MSC v.1500 32 bit (Intel)]
setuptools	0.6c11
SQLite	3.6.21
Subversion	1.7.8 (r1419691)
jQuery	1.4.2

Enabled Plugins

FieldTooltip	0.3
navadd	0.1
tracsimpleticket	5.0dev
tracthemeengine	2.0.1

Python Traceback

Traceback (most recent call last):
  File "D:\bin\Python27\lib\site-packages\trac\web\main.py", line 511, in _dispatch_request
    dispatcher.dispatch(req)
  File "D:\bin\Python27\lib\site-packages\trac\web\main.py", line 193, in dispatch
    if handler.match_request(req):
  File "D:\bin\Python27\lib\site-packages\trac\attachment.py", line 408, in match_request
    req.args['realm'] = realm
  File "D:\bin\Python27\lib\site-packages\trac\web\api.py", line 216, in __getattr__
    value = self.callbacks[name](self)
  File "D:\bin\Python27\lib\site-packages\trac\web\api.py", line 199, in <lambda>
    'args': lambda req: arg_list_to_args(req.arg_list),
  File "D:\bin\Python27\lib\site-packages\trac\web\api.py", line 216, in __getattr__
    value = self.callbacks[name](self)
  File "D:\bin\Python27\lib\site-packages\trac\web\api.py", line 564, in _parse_arg_list
    fs = cgi.FieldStorage(fp, environ=self.environ, keep_blank_values=True)
  File "D:\bin\Python27\Lib\cgi.py", line 508, in __init__
    self.read_multi(environ, keep_blank_values, strict_parsing)
  File "D:\bin\Python27\Lib\cgi.py", line 637, in read_multi
    environ, keep_blank_values, strict_parsing)
  File "D:\bin\Python27\Lib\cgi.py", line 508, in __init__
    self.read_multi(environ, keep_blank_values, strict_parsing)
  File "D:\bin\Python27\Lib\cgi.py", line 622, in read_multi
    raise ValueError, 'Invalid boundary in multipart form: %r' % (ib,)
ValueError: Invalid boundary in multipart form: ''

[Jun Omae]

A duplicate of #9880. Please upgrade to Trac 0.12.5 or later.