Error reported on wrong line

[xzyfer]

Originally reported in sass/node-sass#1186

$foo: 10%; // line 1
// line 2
$error: $foo + 20px; // line 3

Ruby Sass

Error: Incompatible units: 'px' and '%'.
        on line 3 of test.scss

LibSass 3.3.0-beta2

Error: Incompatible units: 'px' and '%'.
        on line 1 of test.scss
>> $percentage: 10%; // line 1
   -------------^