var interval1 = setInterval(function() {
clearInterval(interval1);
postMessage(1);
throw new Error();
}, 10);
close();
var interval2 = setInterval(function() {
clearInterval(interval2);
postMessage(1);
throw new Error();
}, 10);
var interval1 = setInterval(function() {
clearInterval(interval1);
postMessage(1);
throw new Error();
}, 10);
close();
var interval2 = setInterval(function() {
clearInterval(interval2);
postMessage(1);
throw new Error();
}, 10);