The compiled @extend works not right

[jiangming155]

this is the SCSS file:

.error {
  border: 1px #f00;
  background-color: #fdd;
}
.error.intrusion {
  background-image: url("/image/hacked.png");
}
.seriousError {
  @extend .error;
  border-width: 3px;
}

The compiled:

  border: 1px #f00;
  background-color: #fdd;
}

.error.intrusion, .intrusion.seriousError {
  background-image: url("/image/hacked.png");
}

.seriousError {
  border-width: 3px;
}
/*# sourceMappingURL=index.css.map */

but the offical docs are:

.error, .seriousError {
  border: 1px #f00;
  background-color: #fdd; }

.error.intrusion, .seriousError.intrusion {
  background-image: url("/image/hacked.png"); }

.seriousError {
  border-width: 3px; }

obviously, These are not the same meaning

[glenn2223]

Are you getting the same issue with my fork? It's also available on the VS Code marketplace - ref #486