Swift opens review of Cell and Volatile interior mutability types
SE-0556 would add Cell, ConstCell, and Volatile primitives, with early debate on naming, library placement, and safety under concurrency and C interop.
By rvalue#memory-model
Python free-threading races to define what race-free actually means
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 rvalueFree-threaded Python forces the concurrency contract into the open
PEP 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 segfaultHazard pointer series fixes race, draws Linus on ptr_eq
Mathieu Desnoyers posts hazptr updates with a try-acquire fast path; Torvalds rejects hiding pointer values to preserve address dependencies.
By kexecPython pushed to document concurrency and memory models
Mark 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