When a region is flowed into another flow thread and its fragmented between 2 regions, the fragmentation is incorrect. For the moment we'll make the regions unsplitable but for the future we should figure out a way to properly fragment regions (this includes computing correct pagination strut).
Created https://bugs.webkit.org/show_bug.cgi?id=128812 for the future work.
Created attachment 224214 [details] Patch
Comment on attachment 224214 [details] Patch r=me
Comment on attachment 224214 [details] Patch Clearing flags on attachment: 224214 Committed r164234: <http://trac.webkit.org/changeset/164234>
All reviewed patches have been landed. Closing bug.