Is this fixing this issue as well? #1238

I'm not sure, but we definitely had that issue on less.js 1.3.3 .
I fixed that + more issues on losnir/Crunch - see the latest April commits.

Great, thanks!

I tried your fix but the error I'm experiencing (described in the linked issue) persists. Probably it has to do with a different part of the code base.

As I said, I modified some other parts of the code, but I didn't add that to the pull request because it was changed on 1.4.0.

Can you try the following modified file to see if it solves your problem?

https://github.com/losnir/Crunch/blob/master/js/less-1.3.3.mod.js;

Thank you very much for your help! I actually get this error (the one I described in the linked issue) with 1.4b (although I stated otherwise there - got mixed up and am correcting myself there) and I tried your fix with that code (I modded the line in question with your fix in the compiled js file but haven't built less.js myself - not sure if this makes a difference in this particular case). 1.3.3 works for me.
Copying over the whole extractUrlParts() function from your modified 1.3.3 doesn't make a visible difference, the "... wasn't found." error persists.

Okay, this looks like an entirely different problem, let me check that.