Incorrect handling of `not` in media query

[YodasWs]

Not noticing at first a finer point about the not operator in a media query, I attempted the following:

input.scss

input {
  @media not (pointer: fine) {
    background: red;
  }
}

Actual results

libsass 3.5.0.beta.2

@media (pointer: fine) {
  input {
    background: red;
  }
}

⚠️ Notice that libsass has removed the not operator! This is the exact opposite of what I wanted.

Expected result

From MDN:

If you use the not operator, you must specify an explicit media type.

So the correct media query is in fact this:

@media not screen and (pointer: fine) {

ℹ️ I don't expect Sass or libsass to output the above, just an error would suffice.

version info:

$ node-sass --version
node-sass       4.5.3   (Wrapper)       [JavaScript]
libsass         3.5.0.beta.2    (Sass Compiler) [C/C++]

[nschonni]

Duplicate of #2425

[nschonni]

Sorry, just rleated, I was mixing it up with one I saw in dart-sass recently

[xzyfer]

Sass will not add media type for you. Without a type the CSS is invalid and result in a parser error. See dart-sass

Error: expected "{".
  @media not (pointer: fine) {
             ^
  test.scss 2:14  root stylesheet

[YodasWs]

@xzyfer,

Yes, I would expect libsass to give an error on this.

I had originally filed a defect on sass and was told to report it here. node-sass with libsass does not throw an error but outputs the wrong CSS.