No type check for events

[jfrs]

If I declare and use this component (adding a template and/or props doesn't change anything) the events are recognized but not properly type checked in the parent:

<script setup lang="ts">
defineEmits<{
  (event: "foo"): void;
  (event: "bar", thing: number): void;
}>();
</script>

If I use the component like this <HelloWorldTest @foo="handleTest" @bar="handleTest" /> with function handleTest(str: string): void {}, I get (property) foo: (($event?: undefined) => any) | undefined and (property) bar: ((thing: number) => any) | undefined on hover, but there is no error.

To reproduce just add the above script to the volar-starter project and use it in another component.

Visual Studio Code

TypeScript Vue Plugin (Volar)
v0.27.23
Vue Language Features (Volar)
v0.27.23

Version: 1.60.2
Commit: 7f6ab5485bbc008386c4386d08766667e155244e
Date: 2021-09-22T12:01:43.795Z
Electron: 13.1.8
Chrome: 91.0.4472.164
Node.js: 14.16.0
V8: 9.1.269.39-electron.0
OS: Linux x64 5.11.0-34-generic