Watching some #C code running in that window over there -> slowly consume more and more and more memory. But don't worry! It's not leaking! Honest! That's just what #hardlink does.
In other news, the patch I contributed a few years ago to make it work on a Mac has been tweaked and moved around and so on to the extent that the only line #GitBlame now says is my fault is, errm, a single `#endif` π
https://github.com/util-linux/util-linux/blame/master/misc-utils/hardlink.c#L212