multiple comma-delimited selectors having nested &:nth-*(n) outputs multiple n inside parenthesis

[opeologist]

looks like libsass 3.3.3 is introducing a weird error with &:nth-child/&:nth-of-type selectors inside of comma-delimited parents. example below:

test.scss:

html,
body {
  &:nth-child(2) {
    background: #f00;
  }
}

test.css should be:

html:nth-child(2),
body:nth-child(2) {
  background: #f00;
}

libsass v3.3.3 with node-sass v3.5.0-beta.1 compiles to test.css:

html:nth-child(2, 2),
body:nth-child(2, 2) {
  background: #f00;
}

the additional numbers inside the parenthesis seems to be directly affected by how many parent selectors are comma delimited.

eg: test.scss:

html,
body,
h1 {
  &:nth-child(2) {
    background: #f00;
  }
}

test.css:

html:nth-child(2, 2, 2),
body:nth-child(2, 2, 2),
h1:nth-child(2, 2, 2) {
  background: #f00;
}

[opeologist]

just realized #1901 is the same issue. closing.