if the root (table box) has fixed height, it should come in as a layout constraints in layoutInFlowContent()
Created attachment 430204 [details] Patch
Created attachment 430229 [details] Patch
Committed r278303 (238340@main): <https://commits.webkit.org/238340@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 430229 [details].
<rdar://problem/78712372>