Bootstrap compile error on custom download

[arlm]

A less error occured trying to build your bundle. Please paste the error below in an issue for us at http://github.com/twitter/bootsrap! thanks!

{"type":"Parse","message":"Syntax Error on line 207","index":6048,"filename":"bootstrap.css","line":207,"column":0,"extract":["@fluidGridGutterWidth: 2.127659574%;","@iconSpritePath: ../../img/glyphicons-halflings.png;","@iconWhiteSpritePath: ../../img/glyphicons-halflings-white.png;"]}

[mdo]

Please check all the values you've added to the Customizer for syntax errors. If you can confirm there are none, please open a new issue.