nodeData remains None in layers/coder/decoder.py:268, crashes with TypeError exception

[sattva1]

Hi,

I'm encountering the following issue while receiving some messages in a group (i'm running @jlguardi's fork, but it seems to behave the same as wa16 branch in this respect):

Traceback (most recent call last):
  File "<...>/whatsapp_bot/server.py", line 104, in start
    self.stack.loop(timeout=0.5, discrete=0.5)
  File "<...>/whatsapp_bot/yowsup/stacks/yowstack.py", line 187, in loop
    asyncore.loop(*args, **kwargs)
  File "/usr/lib64/python2.7/asyncore.py", line 216, in loop
    poll_fun(timeout, map)
  File "/usr/lib64/python2.7/asyncore.py", line 156, in poll
    read(obj)
  File "/usr/lib64/python2.7/asyncore.py", line 87, in read
    obj.handle_error()
  File "/usr/lib64/python2.7/asyncore.py", line 83, in read
    obj.handle_read_event()
  File "/usr/lib64/python2.7/asyncore.py", line 449, in handle_read_event
    self.handle_read()
  File "<...>/whatsapp_bot/yowsup/layers/network/layer.py", line 102, in handle_read
    self.receive(data)
  File "<...>/whatsapp_bot/yowsup/layers/network/layer.py", line 110, in receive
    self.toUpper(data)
  File "<...>/whatsapp_bot/yowsup/layers/__init__.py", line 75, in toUpper
    self.__upper.receive(data)
  File "<...>/whatsapp_bot/yowsup/layers/stanzaregulator/layer.py", line 29, in receive
    self.processReceived()
  File "<...>/whatsapp_bot/yowsup/layers/stanzaregulator/layer.py", line 49, in processReceived
    self.toUpper(oneMessageData)
  File "<...>/whatsapp_bot/yowsup/layers/__init__.py", line 75, in toUpper
    self.__upper.receive(data)
  File "<...>/whatsapp_bot/yowsup/layers/auth/layer_crypt.py", line 65, in receive
    self.toUpper(payload)
  File "<...>/whatsapp_bot/yowsup/layers/__init__.py", line 75, in toUpper
    self.__upper.receive(data)
  File "<...>/whatsapp_bot/yowsup/layers/coder/layer.py", line 33, in receive
    node = self.reader.getProtocolTreeNode(data)
  File "<...>/whatsapp_bot/yowsup/layers/coder/decoder.py", line 16, in getProtocolTreeNode
    return self.nextTreeInternal(data)
  File "<...>/whatsapp_bot/yowsup/layers/coder/decoder.py", line 252, in nextTreeInternal
    nodeChildren = self.readList(read2, data)
  File "<...>/whatsapp_bot/yowsup/layers/coder/decoder.py", line 276, in readList
    listx.append(self.nextTreeInternal(data))
  File "<...>/whatsapp_bot/yowsup/layers/coder/decoder.py", line 268, in nextTreeInternal
    nodeData = "".join(map(chr, nodeData))
TypeError: an integer is required

Filtering out Nones expectedly fixes the crash, but i don't think it's a proper way to tackle the issue.

[sattva1]

The issue is easily reproducible with the yowsup-cli (from the current "develop" branch):

1. Start the first instance and login to the WA network.
2. Start the second instance and login to the WA network.
3. The first instance crashes with the exception above.

[sattva1]

If nodeData is filtered out of non-int items, the first yowsup-cli instance disconnects (without a crash) with the following message:

ERROR:yowsup.layers.interface.interface:Stream Error type: conflict
{'text': '', 'conflict': None}

INFO:yowsup.layers.interface.interface:Initiating reconnect
general: Disconnected: Requested

[tgalal]

@sattva1 Thanks for writing how to reproduce that error