Svelte 5 error "Cannot access '_' before initialization" in version 241

[98mux]

Describe the bug

A bug that appears in next.241 for me.

Reproduction

I was unable to replicate it on the repl

This code:

<script lang="ts" context="module">
	import _ from 'lodash';
	export const b = _.cloneDeep({ f: '' });
</script>

Causes the error "ReferenceError: Cannot access '_' before initialization"

In my project - for any library, not just lodash.

It only happens in svelte 5 version 241
Svelte 5 version 240 and earlier does not have this issue.

It only happens with npm run dev
npm run build works fine

Logs

ReferenceError: Cannot access '_' before initialization

System Info

System:
    OS: macOS 13.5
    CPU: (8) arm64 Apple M1
    Memory: 93.67 MB / 8.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 20.12.0 - /usr/local/bin/node
    npm: 10.5.0 - /usr/local/bin/npm
  Browsers:
    Chrome: 128.0.6613.86
    Safari: 16.6
  npmPackages:
    svelte: 5.0.0-next.241 => 5.0.0-next.241

Severity

blocking an upgrade

[Conduitry]

This actually is reproducible on the REPL, in that the client-side compiled JS for the above component is:

export const b = _.cloneDeep({ f: '' });

import * as $ from "svelte/internal/client";
import _ from 'lodash';

export default function App($$anchor, $$props) {
	$.push($$props, false);
	$.init();
	$.pop();
}

Interestingly, the server-side compiled version is fine.

[dummdidumm]

cc @benmccann, likely a result of #13048

[benmccann]

oof. yeah, that's no good. thanks for letting me know. I'd be happy to take a look at it, but it looks like @paoloricciuti beat me to it. Thanks @paoloricciuti!

[paoloricciuti]

oof. yeah, that's no good. thanks for letting me know. I'd be happy to take a look at it, but it looks like @paoloricciuti beat me to it. Thanks @paoloricciuti!

No problem at all... I'm not 100% confident with the elegance of my solution but it works