WHY AttributeError: 'NoneType' object has no attribute 'split'??? about sulley HOT 1 OPEN

I got "kinda" the same problem - process monitor is fine for me though, and restarts target as it should:

• [10:04.44] Process Monitor PED-RPC server initialized:
• [10:04.44] Listening on 0.0.0.0:26002
• [10:04.44] awaiting requests...
• [10:04.53] updating target process name to 'pcswebchat'
• [10:04.53] updating stop commands to: ['pkill pcswebchat']
• [10:04.53] updating start commands to: ['./pcswebchat']
• [10:04.53] starting target process
• ['./pcswebchat']
• [10:04.53] done. target up and running, giving it 5 seconds to settle in.
• [10:04.59] starting target process
• ['./pcswebchat']
• [10:04.59] done. target up and running, giving it 5 seconds to settle in.

But the fuzzer fails to continue, and gives the same error as above:

[2016-06-17 10:04:59,865] [INFO] -> procmon detected access violation on test case #1082
[2016-06-17 10:04:59,865] [INFO] -> primitive lacks a name, type: delim, default value:
[2016-06-17 10:04:59,866] [INFO] -> [10:04.59] Crash : Test - 1082 Reason - Segmentation fault
[2016-06-17 10:04:59,867] [WARNING] -> restarting target process

[2016-06-17 10:05:04,875] [CRITICAL] -> Restarting the target failed, exiting.

Exception happened during processing of request from ('127.0.0.1', 46996)
Traceback (most recent call last):
File "/usr/lib/python2.7/SocketServer.py", line 295, in _handle_request_noblock
self.process_request(request, client_address)
File "/usr/lib/python2.7/SocketServer.py", line 321, in process_request
self.finish_request(request, client_address)
File "/usr/lib/python2.7/SocketServer.py", line 334, in finish_request
self.RequestHandlerClass(request, client_address, self)
File "/home/vagrant/PCS/week7-final/assignment/sulley/sulley/sessions.py", line 906, in init
BaseHTTPServer.BaseHTTPRequestHandler.init(self, request, client_address, server)
File "/usr/lib/python2.7/SocketServer.py", line 649, in init
self.handle()
File "/usr/lib/python2.7/BaseHTTPServer.py", line 340, in handle
self.handle_one_request()
File "/usr/lib/python2.7/BaseHTTPServer.py", line 328, in handle_one_request
method()
File "/home/vagrant/PCS/week7-final/assignment/sulley/sulley/sessions.py", line 922, in do_GET
self.do_everything()
File "/home/vagrant/PCS/week7-final/assignment/sulley/sulley/sessions.py", line 949, in do_everything
response = self.view_index()
File "/home/vagrant/PCS/week7-final/assignment/sulley/sulley/sessions.py", line 1083, in view_index
response += '%06d%s%s' % (key, key, val.split("\n")[0], bytes)

AttributeError: 'NoneType' object has no attribute 'split'

from sulley.