Message 385439 - Python tracker

Thank you for testing. I've added a NEWS entry to the PR, so it's ready for review by the core devs.

Note that PyThread_exit_thread() can still be called by daemon threads if they try to take the GIL after Py_Finalize(), and also via C APIs like 
PyEval_RestoreThreads() (see bpo-42969), so, in general, libgcc_s is still required for CPython.