There is this comment at the end of BuilderConverter::convertLineHeight(): // FIXME: The parser should only emit the above types, so this should never be reached. We should change the // type of this function to return just a Length (and not an Optional). return std::nullopt; Let's fix this!
Pull request: https://github.com/WebKit/WebKit/pull/9809
Committed 260027@main (c436cfbb0eb0): <https://commits.webkit.org/260027@main> Reviewed commits have been landed. Closing PR #9809 and removing active labels.
<rdar://problem/105187506>