Interpolations in CSS comments should not be evaluated in compressed mode

[lesf0]

The following compiled in compressed mode

/*
$variable: 0;
.classname {
	width: #{$variable};
}
*/

LibSass 3.5.0.beta.2

Error: Undefined variable: "$variable".

Ruby Sass 3.4.21

[xzyfer]

This actually a feature of Sass. Interpolations (#{}) in comments are still evaluated. The error happens because the interpolation is being evaluated but the assignment is not.

This project is an implementation of the Sass language. Our goal is to be 100% compatible with Sass. We're closing this issue since Ruby Sass produces the same output. In the future please confirm that LibSass' output differs from Ruby Sass before opening an issue.

If you wish to suggest features of file bugs in the Sass language please open an issue with Sass - https://github.com/sass/sass

[lesf0]

@xzyfer , I've actually opened this issue because of different behaviour in Ruby Sass and LibSass. But I've checked out compressed style in both compilers. After your response I've checked default style too and then both compilers produces an error. So I'm not sure if this a bug or not, but at least it's a different from Ruby Sass on same configuration.

[xzyfer]

I'm sorry but it's not clear under which circumstances Ruby Sass and LibSass behave differently. In my tests the result is always Error: Undefined variable: "$variable". in both engines.

[lesf0]

@xzyfer
sass -t compressed test.scss test.css
sassc -t compressed test.scss test.css

[xzyfer]

Right so the difference in that in compressed mode Ruby isn't erring? This was not clear.

[xzyfer]

I've updated the issue to better describe problem.

[lesf0]

Thanks