gh-112826: Add a "What's New" Entry About _thread._is_main_interpreter #112853
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…rpreter (pythongh-112853) As of pythongh-112661, the threading module expects the _thread module to have a _is_main_interpreter(), which is used in the internal threading._shutdown(). This change causes a problem for anyone that replaces the _thread module with a custom one (only if they don't provide _is_main_interpreter()). They need to be sure to add it for 3.13+, thus this PR is adding a note in "What's New". This also forward-ports the "What's New" entry from 3.12 (pythongh-112850). Note that we do not also forward-port the fix in that PR. The fix is there only due to a regression from 3.12.0. There is no regression in 3.13+.
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As of gh-112661, the
threadingmodule expects the_threadmodule to have a_is_main_interpreter(), which is used in the internalthreading._shutdown(). This change causes a problem for anyone that replaces the_threadmodule with a custom one (only if they don't provide_is_main_interpreter()). They need to be sure to add it for 3.13+, thus this PR is adding a note in "What's New".This also forward-ports the "What's New" entry from 3.12 (gh-112850). Note that we do not also forward-port the fix in that PR. The fix is there only due to a regression from 3.12.0. There is no regression in 3.13+.
📚 Documentation preview 📚: https://cpython-previews--112853.org.readthedocs.build/