[Stackless] How to check for errors after calling PyStackless_Schedule()

[Lindell Alderman]

Hello all!  I am embedding stackless inside of a libev event loop.  I have
callback functions that get run on idle and at the top of each loop that
 call PyStackless_Schedule().  My problem is that I can't figure out how to
catch exceptions raised by tasklets and print them out.
In standard python c api, I would expect to just call PyErr_Occurred() and
then PyErr_Fetch().  But PyErr_Occurred seems to always return NULL after
calling PyStackless_Schedule().  Any suggestions?

Lindell Alderman
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