Created attachment 633675 [details] [diff] [review]
If we call isElementClickable aAllowBodyListeners=false, if aElement isn't a descendant of aElement.ownerDocument.body (such as the root element) you can run into problems. This is what causes this error sometimes seen during development:
Wes gave me an r+ on IRC, so I landed this:
Backed out in https://hg.mozilla.org/integration/mozilla-inbound/rev/e4861bc9f86f - other than the orange in mochitests 1-3 and 6-8, robocop, crashtests and reftests, everything when swimmingly with that push.
I pushed to try to make sure this patch wasn't the guilty one. Re-landing:
Uplifted to aurora as part of a roll-up patch: