px/em unit calculations outputting incorrect units.

[browniefed]

From sass/node-sass#585

A few compass translations to raw scss have a hide-text mixin

    $approximate-em-value: 12px / 1em;
    $wider-than-any-screen: -9999em;
    text-indent: $wider-than-any-screen * $approximate-em-value;  

In node-sass 1.2.2 (unsure of libsass version at that time) the calculation would return just the px unit like -119988px however in 2.0 beta the result is -119988em*px/em

sass/sass-spec#212

[KittyGiraudel]

I am not sure 12px / 1em should be valid anyway. em unit is context-dependant. Did I miss something?

[browniefed]

@hugogiraudel sorry this was pulled from compass mixins, compass/typography/text/_replacement.scss in particular. I was under the impression that because the calculation (outputting just the px amount) worked in previous libsass versions that it may be a regression.
The raw sass solution is to strip away all units and then just multiply by -1px, so if this is intended then no big deal.

[xzyfer]

This is fixed and will be available in the first patch release of 3.1.