The result was not correct before r264965 either, but the expected was wrong the same way so the test passed.
Created attachment 412397 [details] Patch
Comment on attachment 412397 [details] Patch Maybe we can add m_isReplica, similar to m_isBackDrop and then we don't need to add a new boolean parameter to computeTransformsRecursive
Comment on attachment 412397 [details] Patch Sounds good. I'll fix. Thank you.
Created attachment 412458 [details] Patch
Committed r269072: <https://trac.webkit.org/changeset/269072>