d6 1.0.0-rc3

Release date: 2026-11-11. The third release candidate for d6 1.0 focuses on correctness, smaller deployment artifacts and broader runtime verification.

Smaller bytecode caches and executables

Type sets now store only their count, flags and used members, rather than fixed 354-byte records. In Pheint, the bytecode cache shrank from 71 MB to 7.3 MB and the compiled executable from 76 MB to 11 MB. Cache format 21 invalidates old caches automatically; source and language behavior are unchanged.

Correct JIT dispatch for captured instance variables

Methods on arrays, hashes and strings loaded through captured instance variables in compiled blocks now use the appropriate native dispatch. Previously, a block such as size.times() do |i| @inboxes.push(i) end could raise undefined method 'push' for Array. The fix preserves compiled execution and correct dispatch instead of relying on a whole-function fallback.

Broader runtime verification

Ten cross-feature workflows cover JSON, collections, numeric boundaries, control flow, regular expressions, module/subclass dispatch, SQLite recovery, subprocess pipes, files and channel payloads. They run across interpreter/JIT, major/minor GC stress, cold/hot bytecode caches, and standalone executables. make test-runtime-workflows runs the full 66-execution matrix; ordinary and release unit targets include its 60-execution subset.

Deployment and documentation

Registry deployments build at -O3, enable the opt-in JIT, and accept --revision=REF to select a merged release tag. The documentation site fixes compatibility-link rendering. Installation examples and marketing downloads point to rc3; the browser REPL is rebuilt from the release source.

No bundled cuts changed. Existing published cut versions remain immutable and are verified against the public registry rather than republished. See the changelog for the complete changes, the runtime coverage inventory for the new tests, and the production record for actual registry deployments and backups.