<type 'exceptions.TypeError'>
Python 2.7.3: /usr/bin/python
Fri Dec 19 08:37:29 2014

A problem occurred in a Python script. Here is the sequence of function calls leading up to the error, in the order they occurred.

 /usr/lib/pymodules/python2.7/flup/server/fcgi_base.py in run(self=<flup.server.fcgi_base.CGIRequest object>)
    556         """Runs the handler, flushes the streams, and ends the request."""
    557         try:
=>  558             protocolStatus, appStatus = self.server.handler(self)
    559         except:
    560             traceback.print_exc(file=self.stderr)
protocolStatus undefined, appStatus undefined, self = <flup.server.fcgi_base.CGIRequest object>, self.server = <flup.server.fcgi.WSGIServer object>, self.server.handler = <bound method WSGIServer.handler of <flup.server.fcgi.WSGIServer object>>
 /usr/lib/pymodules/python2.7/flup/server/fcgi_base.py in handler(self=<flup.server.fcgi.WSGIServer object>, req=<flup.server.fcgi_base.CGIRequest object>)
   1116         try:
   1117             try:
=> 1118                 result = self.application(environ, start_response)
   1119                 try:
   1120                     for data in result:
result = None, self = <flup.server.fcgi.WSGIServer object>, self.application = <function package>, environ = {'DOCUMENT_ROOT': '/afs/csail.mit.edu/group/dig/www/data', 'GATEWAY_INTERFACE': 'CGI/1.1', 'HTTP_ACCEPT': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', 'HTTP_ACCEPT_ENCODING': 'x-gzip, gzip, deflate', 'HTTP_ACCEPT_LANGUAGE': 'en-us,en-gb,en;q=0.7,*;q=0.3', 'HTTP_HOST': 'dig.csail.mit.edu', 'HTTP_USER_AGENT': 'CCBot/2.0 (http://commoncrawl.org/faq/)', 'PATH': '/usr/local/bin:/usr/bin:/bin', 'PATH_INFO': '/2007/tab/snapshot', 'PYTHONPATH': '/afs/csail.mit.edu/group/dig/lib/python', ...}, start_response = <function start_response>
 /afs/csail.mit.edu/group/dig/www/data/2007/tab/snapshot in package(environ={'DOCUMENT_ROOT': '/afs/csail.mit.edu/group/dig/www/data', 'GATEWAY_INTERFACE': 'CGI/1.1', 'HTTP_ACCEPT': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', 'HTTP_ACCEPT_ENCODING': 'x-gzip, gzip, deflate', 'HTTP_ACCEPT_LANGUAGE': 'en-us,en-gb,en;q=0.7,*;q=0.3', 'HTTP_HOST': 'dig.csail.mit.edu', 'HTTP_USER_AGENT': 'CCBot/2.0 (http://commoncrawl.org/faq/)', 'PATH': '/usr/local/bin:/usr/bin:/bin', 'PATH_INFO': '/2007/tab/snapshot', 'PYTHONPATH': '/afs/csail.mit.edu/group/dig/lib/python', ...}, start_response=<function start_response>)
     52 def package(environ, start_response):
     53     last = lastRevision()
=>   54     arch = '/tmp/tabulator-'+last+'.xpi'
     55 
     56     # start HTTP response
arch undefined, last = None

<type 'exceptions.TypeError'>: cannot concatenate 'str' and 'NoneType' objects
      args = ("cannot concatenate 'str' and 'NoneType' objects",)
      message = "cannot concatenate 'str' and 'NoneType' objects"