third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/onactivate-throw-error-with-empty-onerror-worker.js - chromium/src - Git at Google

 self.addEventListener('error', function(event) {});
 self.addEventListener('activate', function(event) { throw new Error(); });
	self.addEventListener('error', function(event) {});
	self.addEventListener('activate', function(event) { throw new Error(); });