Syntax error in Less doesn't make sense

Question

I'm trying to compile a less file to CSS using lessc (installed by npm).

SyntaxError: Operation on an invalid type in /home/..../static/less/app.less:null:-1
1

Note that the first line is not cut off. The 1 from line two is clearly after a line break, so how am I getting a null:-1? It seems like that is a line reference that proceeds the file. Is this from an include? (I've got two) if so, what does the 1 on the second line mean?

I'm using lessc v1.3.3 installed via NPM on Ubuntu.

Answer 1

It would help to have a little more info. What version of Less.js are you using? If you're using 1.4.0-beta then try doing either --strict-maths-off or --strict-units-off, or both. There are other 3rd part compilers that simplify things a bit too.