* Clear frame locals and stack on generator close
Add Frame::clear_locals_and_stack() to release references held by
closed generators/coroutines, matching _PyFrame_ClearLocals behavior.
Call it from Coro::close() after marking the coroutine as closed.
Update test_generators.py expectedFailure markers accordingly.
* Add dir_fd support for rmdir, remove/unlink, scandir
- rmdir: use unlinkat(fd, path, AT_REMOVEDIR) when dir_fd given
- remove/unlink: use unlinkat(fd, path, 0) when dir_fd given
- scandir: accept fd via fdopendir, add ScandirIteratorFd
- listdir: rewrite fd path to use raw readdir instead of nix::dir::Dir
- DirEntry: add d_type and dir_fd fields for fd-based scandir
- Update supports_fd/supports_dir_fd entries accordingly
* cells_free
* gc module internal structure and API
Add gc_state module with GcState, GcGeneration, GcDebugFlags, GcStats.
Replace gc module stubs with working API backed by gc_state.
Add gc_callbacks and gc_garbage to Context.
Add is_gc_tracked, gc_finalized, gc_get_referents to PyObject.
Collection is stubbed (returns 0) — actual algorithm to follow.
* fix dict/weakref/generators
* unmark test_asyncio
* apply review
