$event regression in v0.25.25

[cexbrayat]

It looks like 8628f3f introduced a regression in our projects.

We're using vee-validate, which offers a Form component, with a submit event. You can listen to this submit event to call a method of the component with the submitted values.

With volar v0.25.25, using a simple component like:

<template>
  <Form @submit="register($event)">
    <Field name="login"></Field>
  </Form>
</template>

<script lang="ts">
import { defineComponent } from 'vue';
import { Field, Form } from 'vee-validate';

export default defineComponent({
  name: 'App',
  components: {
    Form,
    Field
  },
  setup() {
    return {
      register(user: { login: string }) {
        console.log(user)
      }
    }
  }
});
</script>

Makes vue-tsc throw:

src/App.vue:2:27 - error TS2345: Argument of type 'undefined' is not assignable to parameter of type '{ login: string; }'.

2   <Form @submit="register($event)">

I put together a small repro here: cexbrayat/vue-v313#1

[johnsoncodehk]

Thanks for the repro case! Fixed in b0d6afc.

[cexbrayat]

@johnsoncodehk Awesome, thanks! I manually patched my vscode-vue-languageservice package with your fix and I confirm it fixes the issue in our project 👌