Here's an example of the bug. What's happening is ngAria has this line:

scope.$eval(attr.ngClick);

It should probably be:

scope.$eval(attr.ngClick, {$event: event});

Can't think of anything else that is an expected expression local that isn't on the scope, but if there are, we'd need to make sure those made it in there as well...

pinging @marcysutton on this one.