Error during make

[megamattron]

I'm seeing:

lessc ./swatchmaker.less > swatch/bootstrap.css
TypeError: Cannot call method 'charAt' of undefined
    at getLocation (/usr/local/lib/node_modules/less/lib/less/parser.js:212:34)
    at new LessError (/usr/local/lib/node_modules/less/lib/less/parser.js:221:19)
    at Object.toCSS (/usr/local/lib/node_modules/less/lib/less/parser.js:385:31)
    at /usr/local/lib/node_modules/less/bin/lessc:107:28
    at /usr/local/lib/node_modules/less/lib/less/parser.js:434:40
    at /usr/local/lib/node_modules/less/lib/less/parser.js:94:48
    at /usr/local/lib/node_modules/less/lib/less/index.js:116:17
    at Object.parse (/usr/local/lib/node_modules/less/lib/less/parser.js:436:17)
    at /usr/local/lib/node_modules/less/lib/less/index.js:115:16
    at [object Object].<anonymous> (fs.js:115:5)

When trying to build with LESS version: lessc 1.3.0 (LESS Compiler) [JavaScript]

This seems related but no resolution yet: less/less.js#592

Any suggestions appreciated!

[thomaspark]

Hi, do you get this error with just the original bootstrap and swatchmaker files, no custom code added?

[megamattron]

Apologies, this appears to be my fault. I went back to vanilla bootstrap and swatch and the error doesn't occur, I'll see if I can build back up and figure out where the error happens.

[thomaspark]

A couple of possibilities: you might need to wrap a value in quotes (eg url()), or you might be passing values with commas into a mixin (eg .box-shadow()) which can be problematic.