michael@0:  addEventListener("error", function(e) {
michael@0:      var obj = {};
michael@0:      for (var prop of ["message", "filename", "lineno"]) {
michael@0:        obj[prop] = e[prop]
michael@0:      }
michael@0:      obj.type = "event";
michael@0:      postMessage(obj);
michael@0: });
michael@0: onerror = function(message, filename, lineno) {
michael@0:   var obj = { message: message, filename: filename, lineno: lineno,
michael@0: 	      type: "callback" }
michael@0:   postMessage(obj);
michael@0:   return false;
michael@0: }
michael@0: throw new Error("workerhello");