Driver crashes after some time

[MarkusEich]

The driver seems to work well, but randomly crashes after a few minutes.
The script myo_raw.py stops with

Traceback (most recent call last):
File "myo_raw.py", line 463, in
m.run(1)
File "myo_raw.py", line 195, in run
self.bt.recv_packet(timeout)
File "myo_raw.py", line 80, in recv_packet
self.handle_event(ret)
File "myo_raw.py", line 112, in handle_event
h(p)
File "myo_raw.py", line 294, in handle_data
self.on_arm(Arm(val), XDirection(xdir))
File "/usr/lib/python2.7/dist-packages/enum.py", line 197, in init
raise EnumBadKeyError(key)
enum.EnumBadKeyError: Enumeration keys must be strings: 2

Using Myo firmware version: 1.2.955.2