Store variable name containing number throws undefined error

[sangxxh]

Describe the bug

I had some stores that were named web3, web3Auth, etc. When importing and using them, the usage will throw an error that the variable is not defined.

Renaming the variables to something else that doesn't contain a number will solve the issue.

Minor issue but this naming is not a problem with pure JS, so something seems to be going wrong here with Svelte.

Reproduction

Create a file num0.ts with this content:

import { readable } from 'svelte/store';

export const num0 = readable(0);

Create a component with this content:

<script lang="ts">
  import { num0 } from "./stores/num0";

  $num0; // <- observe error here
</script>

Logs

index.mjs:2023 Uncaught ReferenceError: num0 is not defined
    at instance (index.mjs:2023:1)
    at init (index.mjs:1809:11)
    at new App (index.mjs:2023:1)
    at main.ts:3:13
    at main.ts:8:2
instance @ index.mjs:2023
init @ index.mjs:1809
App @ index.mjs:2023
(anonymous) @ main.ts:3
(anonymous) @ main.ts:8

System Info

System:
    OS: Linux 5.4 Ubuntu 20.04.3 LTS (Focal Fossa)
    CPU: (8) x64 Intel(R) Core(TM) i7-8550U CPU @ 1.80GHz
    Memory: 7.59 GB / 11.63 GB
    Container: Yes
    Shell: 5.0.17 - /bin/bash
  Binaries:
    Node: 14.16.0 - ~/.nvm/versions/node/v14.16.0/bin/node
    Yarn: 1.22.17 - ~/.nvm/versions/node/v14.16.0/bin/yarn
    npm: 6.14.11 - ~/.nvm/versions/node/v14.16.0/bin/npm
  npmPackages:
    rollup: ^2.3.4 => 2.63.0
    svelte: ^3.0.0 => 3.45.0

Severity

annoyance

[Prinzhorn]

Minor issue but this naming is not a problem with pure JS

You are using TS after all 😄 . What's the TS output? Does it repro with JS? This might not be an issue with Svelte directly but with your TS setup.

[dummdidumm]

If it's not reproducible without TS then it might be a svelte-preprocess issue

[tanhauhau]

only replicable when adding lang="ts" so it's svelte-preprocess issue