Duplicate Named Captures are a TC39 Stage 3 proposal - https://github.com/tc39/ecma262/tree/duplicate-named-capture-groups. This bug exists to track the implementation.
<rdar://100335581>
Pull request: https://github.com/WebKit/WebKit/pull/10355
Committed 260692@main (9ed7d9c4e366): <https://commits.webkit.org/260692@main> Reviewed commits have been landed. Closing PR #10355 and removing active labels.