message: [BUG] Cannot track exception from service worker
diff: @@ -151,7 +151,7 @@ function _getStackFromErrorObj(errorObj:any): IStackDetails {
  details = errorObj;
  } else if (_isStackDetails(errorObj[strStackDetails])) {
  details = errorObj[strStackDetails];
  - } else if (window["opera"] && errorObj[strMessage]) {
  + } else if (window && window["opera"] && errorObj[strMessage]) {
  // Opera
  details = _getOperaStack(errorObj.message);
  } else if (isString(errorObj)) {
  