Enabling cross-actor tracebacks on gevent

[arnuschky]

Re #74

[jodal]

Can you add a test or two ensuring that this keeps on working in the future?

[arnuschky]

Sure, I'll have a look at this next week.

Note that this improved debugging in our system manifold - you can suddenly trace errors throughout the system. Game changer for us.

[jodal]

When finally looking into this, I found that by removing this little if block from the existing tests, we had a failing test on gevent that proved that your fix was correct:

pykka/tests/test_future.py

Lines 121 to 124 in 0417c8b

	if runtime.name == 'gevent':
	# gevent prints the first half of the traceback instead of
	# passing it through to the other side of the AsyncResult.
	return

Fix will be in Pykka 2.0.

[arnuschky]

hey, thanks for fixing it. Sorry for never finding the time to do it myself.