This is making the GTK+ debug bot exit early because many layout tests are hitting that assert after r206481, see for example: https://build.webkit.org/results/GTK%20Linux%2064-bit%20Debug%20(Tests)/r206492%20(11223)/fast/canvas/canvas-drawImage-incomplete-crash-log.txt
Created attachment 290091 [details] Patch
It was so easy, thanks!
Comment on attachment 290091 [details] Patch Clearing flags on attachment: 290091 Committed r206526: <http://trac.webkit.org/changeset/206526>
All reviewed patches have been landed. Closing bug.