sleep() may cause memory leak (python < 3.4)

[maximbr]

Due to python issue https://bugs.python.org/issue17468 wraping a yield in a try clause will cause the generator to be uncollected by gc.
This is the case with the sleep() function in https://github.com/haypo/trollius/blob/trollius/trollius/tasks.py.
When the event loop is closed before the sleep() is done, the generator will be left uncollected, with all references in the coroutine that called sleep().

[jamadden]

Thank you for the report. Unfortunately this project is not maintained and not expecting to make any changes.