This can result in terrible hashing if the key contains RefPtrs, for example using ResolverSharingKey = std::tuple<Vector<RefPtr<StyleSheetContents>>, bool, bool>; in Style::Scope.
<rdar://problem/116679372>
Pull request: https://github.com/WebKit/WebKit/pull/18842
Committed 269081@main (a7e29096ee47): <https://commits.webkit.org/269081@main> Reviewed commits have been landed. Closing PR #18842 and removing active labels.