[issue29842] Make Executor.map work with infinite/large inputs correctly

[Thomas Grainger]

Change by Thomas Grainger <tagrain at gmail.com>:


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keywords: +patch
pull_requests: +17948
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/18566

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue29842>
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