Today's accomplishment: got sufficiently irritated by Go failing self-tests on stock FreeBSD systems that I finally filed a report on the second issue: https://github.com/golang/go/issues/77411
The first issue on stock FreeBSD is https://github.com/golang/go/issues/70702
It's very obvious that approximately nobody runs Go's all.bash on real FreeBSD systems. At best it is "tested" on Go's builder machines, which are clearly non-standard in multiple ways.