with svelte@5.0.0-next.164, svelte-check incorrectly report errors snippets with arguments typed as an object literal

[lts20050703]

Describe the bug

with svelte@5.0.0-next.164, svelte-check incorrectly report errors snippets with arguments typed as an object literal

Type '(this: void, obj: { a: string; b: string; }) => void' is not assignable to type '(this: void, args_0: { a: string; b: string; }) => unique symbol & { _: "functions passed to {@render ...} tags must use the `Snippet` type imported from \"svelte\""; }'.
  Type 'void' is not assignable to type 'unique symbol & { _: "functions passed to {@render ...} tags must use the `Snippet` type imported from \"svelte\""; }'.
    Type 'void' is not assignable to type 'unique symbol'.

Reproduction

<script lang="ts">
</script>

{#snippet x(obj: {a: string, b: string} )}
{/snippet}

https://www.sveltelab.dev/7y2aelivl6k6jlp

Expected behaviour

svelte-check doesn't report any errors.

System Info

System:
    OS: Linux 6.5 KDE neon 6.0 6.0
    CPU: (8) x64 11th Gen Intel(R) Core(TM) i5-1135G7 @ 2.40GHz
    Memory: 7.72 GB / 15.40 GB
    Container: Yes
    Shell: 3.7.1 - /usr/bin/fish
  Binaries:
    Node: 22.3.0 - ~/.local/share/nvm/v22.3.0/bin/node
    npm: 10.8.1 - ~/.local/share/nvm/v22.3.0/bin/npm
    pnpm: 8.15.3 - ~/.local/share/nvm/v22.3.0/bin/pnpm
    bun: 1.1.10 - ~/.bun/bin/bun
  Browsers:
    Brave Browser: 126.1.67.119
  npmPackages:
    svelte: ^5.0.0-next.164 => 5.0.0-next.164

Which package is the issue about?

svelte-check

Additional Information, eg. Screenshots

According to paoloricciuti, "This is actually a problem with the language tools" (sveltejs/svelte#12137 (comment))

[paoloricciuti]

Here's the pr that should fix this

#2412