From `svelte@5.0.0-next.265` an error with `svelte-flatpickr`. Works with `264`.

[frederikhors]

From svelte@5.0.0-next.265 I'm getting an error with svelte-flatpickr. Works with 264.

Uncaught TypeError: Cannot read properties of undefined (reading 'destroy')
    at svelte-flatpickr.js?v=4fcee8e0:2439:11
    at chunk-W6O5AMDL.js?v=4fcee8e0:2434:11
    at execute_effect_teardown (chunk-4UFHU26X.js?v=4fcee8e0:2042:17)
    at destroy_effect (chunk-4UFHU26X.js?v=4fcee8e0:2073:3)
    at destroy_effect_children (chunk-4UFHU26X.js?v=4fcee8e0:774:5)
    at destroy_effect (chunk-4UFHU26X.js?v=4fcee8e0:2064:3)
    at destroy_effect_children (chunk-4UFHU26X.js?v=4fcee8e0:774:5)
    at destroy_effect (chunk-4UFHU26X.js?v=4fcee8e0:2064:3)
    at destroy_effect_children (chunk-4UFHU26X.js?v=4fcee8e0:774:5)
    at destroy_effect (chunk-4UFHU26X.js?v=4fcee8e0:2064:3)
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here:

Reproduction

I'm able to reproduce the issue this way only:

• Open this svelte-dev REPL project

• Wait to it to be loaded

• Open the browser's console

• Comment out the first line (the CSS import)

• See in the browser's console the error

This is the only way to reproduce the error on a SvelteKit / Svelte 5 project I'm currently working on (the error shos up when I navigate pages)

I opened sveltejs/svelte#13605 too.

[frederikhors]

Fixed with sveltejs/svelte#13611.