[tahoe-lafs-trac-stream] [Tahoe-LAFS] #2241: exception when trying to attach file to trac ticket

[Tahoe-LAFS]

#2241: exception when trying to attach file to trac ticket
--------------------------------+---------------------------
 Reporter:  zooko               |          Owner:
     Type:  defect              |         Status:  new
 Priority:  normal              |      Milestone:  undecided
Component:  dev-infrastructure  |        Version:  1.10.0
 Keywords:  trac                |  Launchpad Bug:
--------------------------------+---------------------------
 ambimorph got this error, and I found this exception in the trac.log:

 {{{
 2014-06-04 18:33:49,589 Trac[main] ERROR: Internal Server Error:
 Traceback (most recent call last):
   File "/usr/local/lib/python2.7/dist-
 packages/Trac-1.0.1-py2.7.egg/trac/web/main.py", line 497, in
 _dispatch_request
     dispatcher.dispatch(req)
   File "/usr/local/lib/python2.7/dist-
 packages/Trac-1.0.1-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-1.0.1-py2.7.egg/trac/attachment.py", line 512, in
 process_request
     data = self._do_save(req, attachment)
   File "/usr/local/lib/python2.7/dist-
 packages/Trac-1.0.1-py2.7.egg/trac/attachment.py", line 733, in _do_save
     attachment):
   File "build/bdist.linux-x86_64/egg/tracspamfilter/adapters.py", line
 139, in validate_attachment
     FilterSystem(self.env).test(req, author, changes)
   File "build/bdist.linux-x86_64/egg/tracspamfilter/filtersystem.py", line
 277, in test
     score, reasons, [req.path_info, req.args]).insert()
   File "build/bdist.linux-x86_64/egg/tracspamfilter/model.py", line 139,
 in insert
     self._request_to_xml(self.request)))
   File "build/bdist.linux-x86_64/egg/tracspamfilter/model.py", line 297,
 in _request_to_xml
     return ElementTree.tostring(root)
   File "/usr/lib/python2.7/xml/etree/ElementTree.py", line 1127, in
 tostring
     ElementTree(element).write(file, encoding, method=method)
   File "/usr/lib/python2.7/xml/etree/ElementTree.py", line 821, in write
     serialize(write, self._root, encoding, qnames, namespaces)
   File "/usr/lib/python2.7/xml/etree/ElementTree.py", line 940, in
 _serialize_xml
     _serialize_xml(write, e, encoding, qnames, None)
   File "/usr/lib/python2.7/xml/etree/ElementTree.py", line 933, in
 _serialize_xml
     v = _escape_attrib(v, encoding)
   File "/usr/lib/python2.7/xml/etree/ElementTree.py", line 1093, in
 _escape_attrib
     _raise_serialization_error(text)
   File "/usr/lib/python2.7/xml/etree/ElementTree.py", line 1053, in
 _raise_serialization_error
     "cannot serialize %r (type %s)" % (text, type(text).__name__)
 TypeError: cannot serialize None (type NoneType)
 }}}

 She reports that she then tried the exact same operation again --
 attaching the exact same file to the exact same ticket, and this time it
 worked.

 [timeline?from=Jun+4%2C+2014&daysback=1&authors=&changeset=on&milestone=on&ticket=on&ticket_details=on&wiki=on&update=Update
 The Timeline] shows her successful attachment operation.

 Doubtless this is related to #1581, although note that we upgraded to trac
 v1.0.1 since #1581 last reared its ugly head.

--
Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2241>
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