parse error is swallowed when bad edit occurs via HMR

[benmccann]

Describe the bug

I got the message "Unexpected token" with no further details to help me

Reproduction URL

https://github.com/vitejs/vite/tree/main/packages/create-vite/template-svelte

Reproduction

Create and run a new Svelte project:

npm create vite@latest my-svelte-app -- --template svelte
cd my-svelte-app
npm install
npm run dev

Add {if} to a .svelte template that's open in the browser. It will just say "Unexpected token" with no further details. However, if you refresh the page it will correctly show the frame where the error occurs

Logs

No response

System Info

npmPackages:
    @sveltejs/vite-plugin-svelte: ^2.0.2 => 2.0.2 
    svelte: ^3.55.1 => 3.55.1 
    vite: ^4.1.0 => 4.1.1