Compiled CSS is incorrect

I am using 2013.5 and I came across a scenario where the CSS that is generated from my SCSS file is incorrect. Here is what my SCSS looks like:

.toolbar, .vert-toolbar { .grid_tools { background: url("../Content/Images/grid_tools.png") top left no-repeat;

         &.undo { width: 19px; height: 19px; background-position: -5px -5px; }
         &.select_all { width: 19px; height: 19px; background-position: -5px -29px; }
         &.deselect_all { width: 19px; height: 19px; background-position: -5px -53px; }
         &.merge { width: 19px; height: 19px; background-position: -5px -77px; }
         &.split { width: 19px; height: 19px; background-position: -5px -101px; }
         &.add_zone { width: 19px; height: 19px; background-position: -5px -123px; }
         &.delete_zone { width: 19px; height: 19px; background-position: -5px -147px; }
}

}

The CSS that is generated is:

.toolbar .grid_tools , .vert-toolbar .grid_tools { background: url("../Content/Images/grid_tools.png") top left no-repeat; }

.toolbar .grid_tools .undo , .vert-toolbar .grid_tools.undo { width: 19px; height: 19px; background-position: -5px -5px; }

I've left off the remaining selectors as they all do the same thing. The issue is that on the selector for .toolbar .grid_tools, the sub selector is not getting concatenated for the .toolbar class. It does get concatenated for the .vert-toolbar class, however.

A workaround I found is that if I put the bracket on the same line as the selector, the CSS that gets generated is valid. So, here's a snippet of the above SASS code that works with 2013.5:

.toolbar, .vert-toolbar { .grid_tools { background: url("../Content/Images/grid_tools.png") top left no-repeat;

         &.undo { width: 19px; height: 19px; background-position: -5px -5px; }

.....

I was using the formatting where the bracket is on a new line with 2013.4 and the CSS that was generated was valid, so, this issue is new as of 2013.5.

Let me know if you need anything further to troubleshoot the issue.

madskristensen / WebEssentials2013

Compiled CSS is incorrect #1945