In reply to @nervecenter "Actually I don't think": the only cases where I've
had weird issues myself is when I activated `-ffast-math` by accident (via some
import for example). That can certainly cause some bizarre issues because checks
against NaN with `classify` for example break. Otherwise danger of course can
break stuff, but _usually_ that should become obvious when running the code
under a debug build.

If you can find out what you encountered feel free to report it. I don't have
much time in the last few months, but I'd try to look into it