PropValidation is not reported through VTI

[octref]

Consider two simple files:

Test.vue:

<template>
  <div></div>
</template>

<script>
export default {
  props: ['foo', 'bar']
}
</script>

Parent.vue:

<template>
  <test :foo="1" />
</template>

<script>
import Test from "./Test.vue";

export default {
  components: {
    Test
  }
};
</script>

The error <test> misses props: bar can be seen in editor, but vti diagnostics generates nothing.