infinite loop when tracing the error line

[jviereck]

In some situations when the .less file is not 100% valid, the following line can produce a infinite loop:

for (var n = i, column = -1; input[n] !== '\n'; n--) { column++ }

I fixed it by adding a check to the n variable:

for (var n = i, column = -1; input[n] !== '\n' && n >= 0; n--) { column++ }

The file I tried to parse started like this:

[object Object]/* ***** BEGIN LICENSE BLOCK *****

[cloudhead]

Thanks, I'll make sure I fix that!

[cloudhead]

This was fixed by jamesfoster at some point.