Error hydrating TypeError: $.mark_module_start is not a function

[CodexKI]

Describe the bug

// fa.svelte (Svelte v5.0.0-next.64)
// Note: compiler output will change before 5.0 is released!
import "/node_modules/.vite/deps/svelte_internal_disclose-version.js?v=ac6295d8";

$.mark_module_start(Fa);
import "/src/libs/fa/fa.svelte?svelte&type=style&lang.css";

i export this this an index file in "fa" folder
import Fa from './fa.svelte';
export default Fa;
export {
Fa
};

Reproduction

Astro 4.4
svelte 5 preview 64

Logs

No response

System Info

Astro 4.4
svelte 5 preview 64

Severity

blocking an upgrade

[Conduitry]

Please provide a proper minimal reproduction in the form of a link to a repository.

From that error message, it sounds like you two versions of Svelte floating around simultaneously - one being used to compile your components, and one whose runtime it's trying to use.

[CodexKI]

for now i can't repoduce it, but i found this problema with astro
https://stackblitz.com/edit/withastro-astro-m4ah2m

[dummdidumm]

The error I see in the console in the Stackblitz repro is different. The API of mount changed, you need unmount now to destroy the component, cc @bluwy

[dummdidumm]

Closing this since there's no reproduction, my guess is that there were conflicting Svelte versions. The Astro bug should be fixed now.