import gc
import kaa

@kaa.yield_execution()
def foo():
    yield kaa.YieldContinue
    crash

@kaa.yield_execution()
def bar():
    yield foo()
    print 'unreached but ok'

def garbage_collect():
    gc.collect()
    for g in gc.garbage:
        # print information about garbage gc can't collect
        print 'Unable to free %s' % (g,)

bar()

# if you add a __del__ to InProgress you will see a message that
# YieldFunction can not be freed. So gc detects it. Without a
# __del__ it is still a circular ref, but you will see nothing.
# Why is the object not freed? Or is it and weakref callback is
# not working?
kaa.Timer(garbage_collect).start(0.5)
kaa.main.run()