Pseudo class with multiple parent selectors compilation error

[ElManouche]

I have an error with the following

.test {
  // this works
  .test__elem {
    &:not(.active) {
      opacity: 0.5;
    }
  }

  // this creates a bug in the 'not' pseudo class
  .test__item,
  .test__item2 {
    &:not(.active) {
      opacity: 0.5;
    }
  }
}

is compiled to:

.test .test__elem:not(.active) {
  opacity: 0.5;
}

.test .test__item:not(.active, .active),
.test .test__item2:not(.active, .active) {
  opacity: 0.5;
}

I use sassc 1.9.0 for rails which uses the last version of libsass.
I opened a case in sassc-rails as well

[xzyfer]

This is fixed in 3.3.4.