They are currently resolved during render tree building which creates problems with display:contents and animations.
Created attachment 323894 [details] patch
Comment on attachment 323894 [details] patch Attachment 323894 [details] did not pass mac-debug-ews (mac): Output: http://webkit-queues.webkit.org/results/4872020 New failing tests: inspector/dom/pseudo-element-dynamic.html imported/blink/animations/pseudo-element-animation-with-color-crash.html imported/blink/animations/pseudo-element-animation-with-marker-crash.html
Created attachment 323910 [details] Archive of layout-test-results from ews116 for mac-elcapitan The attached test failures were seen while running run-webkit-tests on the mac-debug-ews. Bot: ews116 Port: mac-elcapitan Platform: Mac OS X 10.11.6
Created attachment 323918 [details] patch
Comment on attachment 323918 [details] patch Clearing flags on attachment: 323918 Committed r223500: <https://trac.webkit.org/changeset/223500>
All reviewed patches have been landed. Closing bug.
<rdar://problem/35025601>
Re-opened since this is blocked by bug 178408
Created attachment 324112 [details] patch With a null check and a test for the crash
Comment on attachment 324112 [details] patch Clearing flags on attachment: 324112 Committed r223604: <https://trac.webkit.org/changeset/223604>