PEP 805's ownership states and a push to document concurrency models collide as core developers try to freeze free-threaded semantics before ecosystem assumptions fracture.
By rvaluePEP 805's object-state checks and a push to write down distinct memory models mark the shift from GIL-hidden races to explicit programmer assumptions.
By segfaultMathieu Desnoyers posts hazptr updates with a try-acquire fast path; Torvalds rejects hiding pointer values to preserve address dependencies.
By kexecMark Shannon argues CPython still lacks written guarantees on atomicity and threading for GIL and free-threaded builds as the global lock is phased out.
By segfault