Deleting a remote folder while synchronizing its children from the client to the server crashes

2013-09-09 14:49:21,167 ERROR [http-bio-0.0.0.0-8080-exec-2] [org.nuxeo.ecm.automation.server.jaxrs.batch.BatchResource] Error while executing automation batch 
org.nuxeo.ecm.core.api.ClientException: Failed to invoke operation NuxeoDrive.CreateFile
	at org.nuxeo.ecm.core.api.ClientException.wrap(ClientException.java:59)
...
Caused by: org.nuxeo.ecm.core.api.ClientException: Cannot create a file in file system item with id defaultSyncRootFolderItemFactory#default#0004ea07-35c2-471f-aed4-5c779666d805 because it doen't exist.
	at org.nuxeo.drive.service.impl.FileSystemItemManagerImpl.createFile(FileSystemItemManagerImpl.java:213)

2013-09-09 14:48:50,534 6961 140724566996736 DEBUG    nxdrive.synchronizer Detected a new non-alignable local file at /Shared with JOE/very_fat_files.tar.gz
2013-09-09 14:49:04,776 6961 140724566996736 DEBUG    nxdrive.synchronizer Creating remote document 'very_fat_files.tar.gz' in folder 'Shared with JOE'
2013-09-09 14:49:21,353 6961 140724566996736 DEBUG    nxdrive.client.base_automation_client {"error" : "Failed to invoke operation NuxeoDrive.CreateFile"}
2013-09-09 14:49:21,354 6961 140724566996736 ERROR    nxdrive.synchronizer Failed to sync LastKnownState<local_folder=u'Nuxeo Drive', local_path=u'/Shared with JOE/very_fat_files.tar.gz', remote_name=None, local_state=u'created', remote_state=u'unknown', pair_state=u'locally_created'>, blacklisting doc pair for 300 seconds
Traceback (most recent call last):
  File "/home/ataillefer/sources/nuxeo/addons/nuxeo-drive/nuxeo-drive-client/nxdrive/synchronizer.py", line 1034, in synchronize
    self.synchronize_one(pair_state, session=session)
  File "/home/ataillefer/sources/nuxeo/addons/nuxeo-drive/nuxeo-drive-client/nxdrive/synchronizer.py", line 573, in synchronize_one
    local_info, remote_info)
  File "/home/ataillefer/sources/nuxeo/addons/nuxeo-drive/nuxeo-drive-client/nxdrive/synchronizer.py", line 693, in _synchronize_locally_created
    parent_ref, doc_pair.get_local_abspath(), filename=name)
  File "/home/ataillefer/sources/nuxeo/addons/nuxeo-drive/nuxeo-drive-client/nxdrive/client/remote_file_system_client.py", line 120, in stream_file
    file_path, filename=filename, parentId=parent_id)
  File "/home/ataillefer/sources/nuxeo/addons/nuxeo-drive/nuxeo-drive-client/nxdrive/client/base_automation_client.py", line 301, in execute_with_blob_streaming
    return self.execute_batch(command, batch_id, '0', **params)
  File "/home/ataillefer/sources/nuxeo/addons/nuxeo-drive/nuxeo-drive-client/nxdrive/client/base_automation_client.py", line 372, in execute_batch
    check_params=False, **params)
  File "/home/ataillefer/sources/nuxeo/addons/nuxeo-drive/nuxeo-drive-client/nxdrive/client/base_automation_client.py", line 209, in execute
    resp = self.opener.open(req, timeout=timeout)
  File "/usr/lib/python2.7/urllib2.py", line 406, in open
    response = meth(req, response)
  File "/usr/lib/python2.7/urllib2.py", line 519, in http_response
    'http', request, response, code, msg, hdrs)
  File "/usr/lib/python2.7/urllib2.py", line 444, in error
    return self._call_chain(*args)
  File "/usr/lib/python2.7/urllib2.py", line 378, in _call_chain
    result = func(*args)
  File "/usr/lib/python2.7/urllib2.py", line 527, in http_error_default
    raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
HTTPError: HTTP Error 500: Erreur Interne de Servlet
2013-09-09 14:49:21,457 6961 140724566996736 DEBUG    nxdrive.synchronizer Deleting local folder '/home/ataillefer/Nuxeo Drive/Shared with JOE'