> What kind of errors are you having that makes the get() call fail?
Try running the script I posted.  It will fail with an AttributeError (raised during unpickling) and hang.

I'll note that the particular issues that I've run into in practice are:
- OOM kill destroying my workers but leaving the parent silently waiting
- KeyboardInterrupting the workers, and then having the parent hang

This AttributeError problem is one that I discovered while generating test cases for the patch.