It looks like this is the relevant upstream bug (though it's not totally clear if the original reporter is on armel or armhf)
https://bugs.webkit.org/show_bug.cgi?id=85076 Alex -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org