Memeplex added the comment:
I would like to reopen this issue because of the following, very related,
behavior. Try this:
```
import multiprocessing as mp
import time
def g():
time.sleep(100)
def f():
mp.Process(target=g).start()
1/0
mp.Process(target=f).start()
```
It won't show the ZeroDivisionError until you keyboard interrupt the g()
process or wait for it to end. This is because _exit_function will join every
active non-daemon child, which happens before printing and flushing the error.
IMO the exception should be shown before joining children, since keeping the
error silent is asking for trouble.
----------
nosy: +memeplex
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<http://bugs.python.org/issue13812>
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