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Title: Shut down leaked executors in `test_interpreter_pool` by StanFromIreland · Pull Request #153780 · python/cpython · GitHub

Open Graph Title: Shut down leaked executors in `test_interpreter_pool` by StanFromIreland · Pull Request #153780 · python/cpython

X Title: Shut down leaked executors in `test_interpreter_pool` by StanFromIreland · Pull Request #153780 · python/cpython

Description: Several tests created an InterpreterPoolExecutor and never shut it down, so their worker threads were only cleaned up whenever the garbage collector happened to destroy the abandoned executor. On the slow buildbot that took longer than the 1-second limit threading_cleanup() allows in tearDown, for example in this run: test_submit_func_globals (test.test_concurrent_futures.test_interpreter_pool.InterpreterPoolExecutorTest.test_submit_func_globals) ... Warning -- threading_cleanup() failed to clean up threads in 1.0 seconds Warning -- before: thread count=0, dangling=1 Warning -- after: thread count=1, dangling=2 Warning -- Dangling thread: Warning -- Dangling thread: <_MainThread(MainThread, started 273774698528)> test_submit_local_instance (test.test_concurrent_futures.test_interpreter_pool.InterpreterPoolExecutorTest.test_submit_local_instance) ... Warning -- threading_cleanup() failed to clean up threads in 1.0 seconds Warning -- before: thread count=0, dangling=1 Warning -- after: thread count=1, dangling=2 Warning -- Dangling thread: Warning -- Dangling thread: <_MainThread(MainThread, started 273774698528)> Re-running test.test_concurrent_futures.test_interpreter_pool in verbose mode

Open Graph Description: Several tests created an InterpreterPoolExecutor and never shut it down, so their worker threads were only cleaned up whenever the garbage collector happened to destroy the abandoned executor. On t...

X Description: Several tests created an InterpreterPoolExecutor and never shut it down, so their worker threads were only cleaned up whenever the garbage collector happened to destroy the abandoned executor. On t...

Opengraph URL: https://github.com/python/cpython/pull/153780

X: @github

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86d0f0e Shut down leaked executors in `test_interpreter_pool` StanFromIreland Jul 15, 2026 https://github.com/python/cpython/pull/153780/commits/86d0f0e75f1e706788b8891543127571e9e0da09
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