try {
var source = new EventSource("http://this is invalid/")
postMessage([false, 'no exception thrown'])
source.close()
} catch(e) {
postMessage([true, e.code])
}
try {
var source = new EventSource("http://this is invalid/")
postMessage([false, 'no exception thrown'])
source.close()
} catch(e) {
postMessage([true, e.code])
}