STINNER Victor <victor.stin...@haypocalc.com> added the comment:

I fixed a bug in _communicate_with_poll(): raise an error if the endtime-time() 
is negative. If poll() is called with a negative timeout, it blocks until it 
gets an event.

New changeset 3664fc29e867 by Victor Stinner in branch 'default':
Issue #11757: subprocess ensures that select() and poll() timeout >= 0
http://hg.python.org/cpython/rev/3664fc29e867

By the way, the doc modified by [c4a0fa6e687c] is still wrong: the timeout 
feature was introduced in 3.3, not in 3.2. And the change is not documented in 
Misc/NEWS.

@Reid Kleckner: Can you fix that? (I reopen this issue to not forget)

----------
nosy: +haypo
status: closed -> open

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