Hi, Does anyone use threading debug PYTHONTHREADDEBUG=1 env var on a Python debug build? If not, can I just remove it? -- To fix a race condition at thread exit on Linux using the glibc, I removed calls to pthread_exit() (PyThread_exit_thread()) in the _thread module: https://bugs.python.org/issue44434 A side effect of this change is the removal of the "PyThread_exit_thread called" threading debug log when using PYTHONTHREADDEBUG=1 environment variable. I never used PYTHONTHREADDEBUG. I just tried it and it produces tons of output in stdout about locks. It looks basically useless because it produces way too many logs, and it pollutes stdout (ex: most Python tests fail when it's enabled). This debug mode requires to build Python in debug mode (./configure --with-pydebug): https://docs.python.org/dev/using/configure.html#python-debug-build IMO there are enough external debugging tools to debug threading issues. Python no longer has to come with its built-in logs. I propose to deprecate the feature in Python 3.11 and remove it in 2 releases (Python 3.13). Victor -- Night gathers, and now my watch begins. It shall not end until my death.