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bpo-32604: Swap threads only if the interpreter is different. by ericsnowcurrently · Pull Request #5778 · python/cpython · GitHub
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bpo-32604: Swap threads only if the interpreter is different.#5778

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ericsnowcurrently merged 2 commits into
python:masterfrom
ericsnowcurrently:fix-thread-swap-same-interpreter
Feb 20, 2018
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bpo-32604: Swap threads only if the interpreter is different.#5778
ericsnowcurrently merged 2 commits into
python:masterfrom
ericsnowcurrently:fix-thread-swap-same-interpreter

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ericsnowcurrently commented Feb 20, 2018
edited by bedevere-bot
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The CPython runtime assumes that there is a one-to-one relationship (for a given interpreter) between PyThreadState and OS threads. Sending and receiving on a channel in the same interpreter was causing crashes because of this (specifically due to a check in PyThreadState_Swap()). The solution is to not switch threads if the interpreter is the same.

https://bugs.python.org/issue32604

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Thanks @ericsnowcurrently for the PR 🌮🎉.. I'm working now to backport this PR to: 3.7.
🐍🍒⛏🤖

miss-islington pushed a commit to miss-islington/cpython that referenced this pull request Feb 20, 2018
…gh-5778) The CPython runtime assumes that there is a one-to-one relationship (for a given interpreter) between PyThreadState and OS threads. Sending and receiving on a channel in the same interpreter was causing crashes because of this (specifically due to a check in PyThreadState_Swap()). The solution is to not switch threads if the interpreter is the same. (cherry picked from commit f53d9f2) Co-authored-by: Eric Snow <ericsnowcurrently@gmail.com>

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GH-5783 is a backport of this pull request to the 3.7 branch.

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