Tests for fix to crash when mixin @import and @use

[Goodwine]

[skip dart-sass]

[nex3]

I think it's also worth testing the meta.load-css() equivalent to the nested import case, since that should produce an error.

[Goodwine]

Do you mean that:

.foo {
  @include meta.load-css('upstream');
}

Should throw an error, when this does not?

.foo {
  @import 'upstream';
}

Because it actually throws an error, but I don't think it should 🤔

[Goodwine]

but if it should, then we're all set :P

[nex3]

Yes, it should. meta.load-css() loads the module as a module, which means that its CSS is generated context-independently and only afterwards injected into the document. A stylesheet loaded as a module shouldn't allow top-level declarations, because that's not valid CSS.