Errors thrown in the asynchronous callback function in watch will not be caught.

[ygj6]

Version: 1.0.0-rc.13

The reproduced demo is: https://codesandbox.io/s/tngl5

After executing npm run serve, the console will display as follows, then the error will not be caught

The main code is as follows:

Vue.config.errorHandler = (err) => {
  console.log("catch the error:");
  console.log(err);
};

setup(){
  const obj = reactive({a:11})
  watch(
    () => obj.a,
    async() => {
      throw new Error("111");
    },
    { immediate: true}
  );
}