Vite dev/build fails when dependency using type-only features

[x0k]

Describe the bug

When starting the dev server, I get the following error:

✘ [ERROR] Expected "{" but found "<"

    node_modules/svelte-tiler/dist/tiles/tabs.svelte:104:48:
      104 │   class TabsTileDropTarget extends TileDropTarget<Tiles['tabs']> {
          │                                                  ^
          ╵                                                  {

Error: Build failed with 1 error:
node_modules/svelte-tiler/dist/tiles/tabs.svelte:104:48: ERROR: Expected "{" but found "<"
    at failureErrorWithLog (/home/qo5ip4we0aj4vrkeetv8swp3pbyxe1-fmt4/node_modules/esbuild/lib/main.js:1457:15)
    at eval (/home/qo5ip4we0aj4vrkeetv8swp3pbyxe1-fmt4/node_modules/esbuild/lib/main.js:916:25)
    at eval (/home/qo5ip4we0aj4vrkeetv8swp3pbyxe1-fmt4/node_modules/esbuild/lib/main.js:1335:9) {
  errors: [Getter/Setter],
  warnings: [Getter/Setter]
}

Reproduction

SvelteLab

Playground (Works)

Dependency source code

Logs

System Info

System:
    OS: Linux 5.0 undefined
    CPU: (8) x64 Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
    Memory: 0 Bytes / 0 Bytes
    Shell: 1.0 - /bin/jsh
  Binaries:
    Node: 20.19.1 - /usr/local/bin/node
    Yarn: 1.22.19 - /usr/local/bin/yarn
    npm: 10.8.2 - /usr/local/bin/npm
    pnpm: 8.15.6 - /usr/local/bin/pnpm
  npmPackages:
    svelte: ^5 => 5.50.0

Severity

blocking an upgrade

[x0k]

I was going to write that using the preprocessor with script: true works as a workaround, but in my project it causes this issue to become a SyntaxError:

Uncaught SyntaxError: The requested module '/.../dist/icons.svelte' does not provide an export named 'arrowDownOutline' (at definitions.js:1:10)

It seems that at this point, the simplest solution for me would be to republish the dependency with the script: true preprocessor.

I also noticed that SvelteLab creates a svelte.config.js file without a preprocessor. So here is a new link to reproduction with a locked dependency version and the vite preprocessor: SvelteLab