Segmentation fault when trying to run SvelteKit dev with 0.16.0-beta since 0.16.0-beta.9

Describe the bug When i try to run npm run dev in latest SvelteKit, i get an error [1] 2604 segmentation fault npm run dev. Tried to revert version on vite-plugin-windicss step by step and found that 0.16.0-beta.9 and earlier versions are working normally.

Minimal Reproductions

1. Set up latest SvelteKit skeleton project with enabled typescript, eslint and prettier with npm init svelte@next command
2. Install vite-plugin-windicss with npm i -D vite-plugin-windicss
3. Add it to svelte.config.js like this

import preprocess from 'svelte-preprocess';
import windicss from 'vite-plugin-windicss';

/** @type {import('@sveltejs/kit').Config} */
const config = {
	// Consult https://github.com/sveltejs/svelte-preprocess
	// for more information about preprocessors
	preprocess: preprocess(),
	kit: {
		// hydrate the <div id="svelte"> element in src/app.html
		target: '#svelte',

		vite: {
			plugins: [
				windicss.default()
			]
		}
	}
};
export default config;

1. Running npm run dev causes segmentation fault error
2. Running npm run build causes

[vite-plugin-svelte] failed to require config /Users/dioxine/svelte-test/svelte.config.js
Error [ERR_REQUIRE_ESM]: Must use import to load ES Module: /Users/dioxine/svelte-test/svelte.config.js
require() of ES modules is not supported.
...

Versions

• vite-plugin-windicss: v0.16.0-beta.14
• vite: v2.3.0
• framework(vue/react/svelte/etc): SvelteKit v1.0.0-next.105
• node: v14.15.4

Additonal Context After some investigation, i found that it have started after devs of SvelteKit switched to ESM format of svelte.config.js in 1.0.0-next.97 version. With CommonJS version of svelte.config.cjs vite-plugin-windicss works normally but seems that they will remove ability to use CJS version of config soon.

[gent-911]

any solution to the problem?

[eikaramba]

@TheComputerM downgrade to 0.15.10 for now. there is a pr open to fix this, once it is merged it should work. see https://github.com/sveltejs/vite-plugin-svelte/pull/54