Svelte 5: Building an app fail when creating stores using `let name = $derived()` about svelte HOT 8 CLOSED

Regarding the error, see this issue:

• #11306

The fix is implemented and deployed to the REPL but has not been published in @next it seems.

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Can you provide an actual complete reproduction in the REPL please? When I try to compile that component, I'm getting a compile-time error from Svelte (not an error from Rollup) about client = value being invalid because you are assigning to derived state.

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Hi @Conduitry

I already tried the RELP before, and it does mark it as an error. Basically this happens on local projects, maybe a linter or TS conflict? I don't know.

Can you try with a demo project using TS?

I have all extensions installed and updated. Yesterday I wrote to the discord server requesting that someone try to compile the example to avoid opening an issue here, but there was no one to help me.

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If you can't reproduce it in the REPL, a repository to clone that's a minimal reproduction will also work.

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If you can't reproduce it in the REPL, a repository to clone that's a minimal reproduction will also work.

Sorry for waiting,

I was just creating the repositories and wanted to try using version 114, but now I'm getting the following error:

 Error when evaluating SSR module /src/routes/+page.svelte: failed to import "/src/lib/store.svelte.ts"
|- TypeError: Cannot read properties of undefined (reading 'runes')

I have not changed anything in the code, I have only updated to v114

I have blocked the version at 113 to make the repositories.

Repos:
https://github.com/JLAcostaEC/runes-ts

https://github.com/JLAcostaEC/runes-js

Just clone it and run/build it. Dev mode works, build no.

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Regarding the error, see this issue:

• Svelte 5: Preview REPL state.analysis undefined? #11306

The fix is implemented and deployed to the REPL but has not been published in @next it seems.

Maybe we need another issue for that... 🤔

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Hi @Conduitry have you been able to verify this issue? Or do you need something else I can contribute?

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Checked out the repo using the latest version - it now correctly reports that you cannot reassign to $derived in both build and dev.

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