Negative Interpolation Variable Error

[spencerbaynton]

$variable: 1;

$interpolation: #{$variable}px;

div {
  top: -$interpolation;
}

Expected (3.3.5 and 3.2.19) output:

div {
  top: -1px;
}

libsass output:

div {
  top: -$interpolation; }

[nschonni]

It's a hack, but the following works

$variable: 1;

$interpolation: #{$variable}px;

div {
  top: unquote("" -$interpolation);
}

Converts it to a string, and then unquotes the value

[HamptonMakes]

This is definitely an error I've seen and we need to fix it. This is a very clean test case!