exception.attributeerror 'nonetype' object has no attribute 'error'

[keyurrakholiya]

i am using R-pi
using dronekit 2.4.0
example : vehicle_state.py

getting error:

[hamishwillee]

Looks like a bug. @peterbarker suggestions for debugging?

@keyurrakholiya Can you run Python 2.7? This isn't likely the problem, but it is one less dependency to worry about.

[keyurrakholiya]

@hamishwillee
yes i am using python 2.7

[peterbarker]

This is a race condition in shutdown. It can safely be ignored - but a patch to close down the mavlink threads nicely would be better!

[peterbarker]

This issue should have been fixed by #648