Editing Content in Slots Does Not Trigger HMR Render

[Spittal]

Describe the bug

When using Vite dev server. Editing a component includes a component with slot content seems to prevent HMR re-render.

<template>
  <h1>Slot HMR Bug Reproduction</h1> <!-- Editing this line does trigger HMR render -->
  <SimpleSlot>
     Slot <!-- Editing this line does NOT trigger HMR render -->
  </SimpleSlot>
</template>


<!-- SimpleSlot.vue in other file, here for clarity -->
<template functional>
  <div><slot></slot></div>
</template>

I have tested and noticed a few things:

• When hitting save in the above situation, the HMR network call happens, and I can see the content is correct. But, a re-render of the component never happens.
• Regression of Slot content does not get updated when changed #255

Reproduction

https://github.com/jamiealex/nested-slot-hmr-vite-bug-reproduction

System Info

• required vite version: 0.17.2
• required Operating System: MacOS 10.15.4
• required Node version: v12.16.1
• vue and compiler-sfc version: 3.0.0-beta.14

[yyx990803]

Fixed in vuejs/core@2408a65 (requires new vue-next release)