Svelte 5: `import.meta.env` crashes app if `meta` prop exists

[kyoshino]

Describe the bug

In Svelte 5, using import.meta.env crashes the application if there is a prop named meta in the component. The same issue happens with import.meta.glob.

Firefox says: Uncaught (in promise) TypeError: import.meta is not a function
Chrome says: Uncaught (in promise) TypeError: (intermediate value) is not a function

When this error happens, my SvelteKit site shows a blank page.

Reproduction

REPL: v4.2.19 / v5.1.13

This is a minimum version of my <MetaTags> component. With Svelte 4, REPL says just undefined but that’s fine, my code has no error. But with Svelte 5, this no longer works. I need to rename the prop. Uncommenting export let meta = {}; removes the error, saying undefined like Svelte 4.

Logs

No response

System Info

-

Severity

blocking an upgrade

[Ocean-OS]

I found the cause of the error; Svelte's compiler uses is-reference, a package that is used for the AST to find nodes that are references (eg variables, like foo in let foo = 0, but not foo in bar.foo). However, this package does not work for MetaProperty nodes, which are what are parsed from import.meta.*. I've created an issue and now a pull request in the repository because of this, thanks for the bug report!

[Ocean-OS]

This issue has been resolved, could someone please close it?

[dummdidumm]

Technically it's not fully closed yet because to be sure everyone gets the update we gotta bump the dependency

[kyoshino]

Updated is-reference locally and the site no longer crashes. Thanks for the fix, @Ocean-OS!