4.0 open 1 day late (12/25/2025) 94% 19 issues (18 closed — 1 open) Related issues Feature #19057: Hide implementation of `rb_io_t`. Actions Feature #21221: Proposal to upstream ZJIT Actions Feature #21262: Proposal: `Ractor::Port` Actions Feature #21268: Implement a lock-free hash set for fstring table Actions Feature #21275: Update to Unicode 17.0 Actions Feature #21311: Namespace on read (revised) Actions Feature #21550: Ractor.shareable_proc/shareable_lambda to make sharable Proc object Actions Feature #21557: Ractor.shareable_proc to make sharable Proc objects, safely and flexibly Actions Feature #21701: Enumerator.produce accepts an optional `size` keyword argument Actions
4.1 open Due in about 12 months (12/25/2026) 0% 3 issues (0 closed — 3 open) Related issues Feature #8948: Frozen regex Actions Feature #21768: Remove deprecated functions Actions Feature #21788: Promote Thread::Monitor to a core class Actions