While testing https://golang.org/cl/36800, it appears that the FreeBSD amd64 system crashes when adding regular disk files to kqueue. This is based on testing using gomote, which creates a VM running FreeBSD 10.1 (I think). I am going to disable using kqueue on FreeBSD for regular files; it will still be used for sockets as usual. I am opening this issue to note the problem in the hopes that it can be fixed by someone more familiar with FreeBSD.