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bpo-5001: More-informative multiprocessing error messages (#3079)

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* Make error message more informative

Replace assertions in error-reporting code with more-informative version that doesn't cause confusion over where and what the error is.

* Additional clarification + get travis to check

* Change from SystemError to TypeError

As suggested in PR comment by @pitrou, changing from SystemError; TypeError appears appropriate.

* NEWS file installation; ACKS addition (will do my best to justify it by additional work)

* Making current AssertionErrors in multiprocessing more informative

* Blurb added re multiprocessing managers.py, queues.py cleanup

* Further multiprocessing cleanup - went through pool.py

* Fix two asserts in multiprocessing/util.py

* Most asserts in multiprocessing more informative

* Didn't save right version

* Further work on multiprocessing error messages

* Correct typo

* Correct typo v2

* Blasted colon... serves me right for trying to work on two things at once

* Simplify NEWS entry

* Update 2017-08-18-17-16-38.bpo-5001.gwnthq.rst

* Update 2017-08-18-17-16-38.bpo-5001.gwnthq.rst

OK, never mind.

* Corrected (thanks to pitrou) error messages for notify

* Remove extraneous backslash in docstring.
This commit is contained in:
Allen W. Smith, Ph.D 2017-08-29 17:52:18 -05:00 • committed by Antoine Pitrou
parent 631fdee6e6
commit bd73e72b4a
15 changed files with 120 additions and 39 deletions
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5
Lib/multiprocessing/dummy/__init__.py
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@ -41,7 +41,10 @@ class DummyProcess(threading.Thread):
self._parent = current_process()
def start(self):
assert self._parent is current_process()
if self._parent is not current_process():
raise RuntimeError(
"Parent is {0!r} but current_process is {1!r}".format(
self._parent, current_process()))
self._start_called = True
if hasattr(self._parent, '_children'):
self._parent._children[self] = None