@at-root generate wrong code with nested mixins

[singggum3b]

@mixin spinner-item($var) {
    .SpinnerItem {
        $bg-color: #7f7f7f; //Local scope variable
        background-color: $bg-color;
    }
}

@mixin hello($var) {
        @include spinner-item($var);
}

.module {
   @at-root {
      @include hello($spinner);
   }
}

output :

.module .SpinnerItem {
.....
}

where i expected SpinnerItem to be at root.
Ruby sass seem to generate correct code.

[xzyfer]

This is a duplicate of sass/libsass#2006. Please subscribe to that issue for updates.