Comments before pseudo selector interpolations ::#{$variable} cause shifts in error line number reporting

[drewwells]

This is a big bug since it throws off error line numbers for the rest of the stylesheet.

I made a couple sassmeister libsass v 2.0.0, I found this to be the case in 3.0rc4 too (thanks for releasing so often guys!). It looks like errors in interpolation syntax within a control structure with a line comment directly preceding it causes a line number to be missed.

@mixin
http://sassmeister.com/gist/5d0b00544a4738305617
@if
http://sassmeister.com/gist/9560513eae9c2f9752f5

I could only reproduce this when using pseudo selector interpolation. I found this when importing bourbon's placeholder sass
https://github.com/thoughtbot/bourbon/blob/71a7e61cfbc9975dcea6836aee7ecdaeb93861fa/app/assets/stylesheets/css3/_placeholder.scss

[drewwells]

@mgreter are there sass specs for the accuracy of error line numbers?

[xzyfer]

There are currently no specs in Libsass, but @mgreter has some in perl-sass. There's more information in this thread #786 (comment)

[drewwells]

This has been working since some changes on master (not sure when). Verified working on @5757248ae13c6b7362949637ecb1a2de7ef6d426