See failing test case (to be added in bug#26382) in LayoutTests/fast/js/function-bind.html.
Created attachment 165230 [details] fix
Comment on attachment 165230 [details] fix Attachment 165230 [details] did not pass mac-ews (mac): Output: http://queues.webkit.org/results/13952809
Comment on attachment 165230 [details] fix Attachment 165230 [details] did not pass win-ews (win): Output: http://queues.webkit.org/results/13975558
Fixed in r129281