store.compute in oncreate data not loading initial value

[btakita]

<div class="Message">
  <header>{{$message_header}}</header>
</div>

<script>
  export default {
    oncreate() {
      this.store({person: {name: 'John Smith'}))
      this.store.compute('message_header', ['person'], person => (person && person.name) || '')
    }
  }
</script>

The first rendered value of $message_header will be ''. Any subsequent changes to person in the store will show up in the UI.

Something that causes the initial render to occur is to set message_header in the store before compute('message_header', ...)

      this.store.set({message_header: (person && person.name) || ''})
      this.store.compute('message_header', ['person'], person => (person && person.name) || '')

[Rich-Harris]

Is this the same bug that was recently fixed in Svelte itself?

[btakita]

Yes it is the same issue as sveltejs/svelte#1327