Astro hangs on invalid scss

[altano]

What version of astro are you using?

1.1.5

Are you using an SSR adapter? If so, which one?

None

What package manager are you using?

npm

What operating system are you using?

linux / stackblitz

Describe the Bug

Invalid SCSS causes Astro to hang in dev mode. The page will never finish loading. This SCSS (notice the lack of a closing parenthesis) causes the problem:

<style lang="scss">
	article:global(:is(h1, h2, h3, h4, h5, h6):hover {
		color: purple;
	}
</style>

This SCSS is the only thing added to the default Astro demo. Remove it and restart the dev server and the page will load fine.

Link to Minimal Reproducible Example

https://stackblitz.com/edit/github-ebopvr?file=src/components/Card.astro

Participation

• I am willing to submit a pull request for this issue.