Map leaking - no .lin file being generated

So I have a leak in my map, and hammer doesn’t seem to be generating a .lin file to allow me to diagnose it. Any idea what I could do here?

Here’s a compile log:

The map I tested this with is literally a hollow box with an intentional leak. It’s not generating a .lin file, or if it is, I have no idea where to find it. This is a problem.
I’ve tried this with several engine versions.

there’s no .lin file because there’s no entities in the map.

Oh, right. Thanks.