<===> input.scss
.code.ruby > {
    &.ruby {
        color: green;
    }
}
<===> error
Error: Invalid parent selector for "&.ruby": ".code.ruby >"
        on line 2 of input.scss
  Use --trace for backtrace.

<===> error-dart-sass
Error: Parent ".code.ruby >" is incompatible with this selector.
  ,
2 |     &.ruby {
  |     ^^^^^^^
  '
  input.scss 2:5  root stylesheet