The Wasm GC proposal has finalized its opcodes in the last few months and has reached stage 4. The JSC implementation should be updated to the final opcode numbering soon.
Pull request: https://github.com/WebKit/WebKit/pull/18967
Committed 269454@main (afcea26699c7): <https://commits.webkit.org/269454@main> Reviewed commits have been landed. Closing PR #18967 and removing active labels.
<rdar://problem/117118851>