Comment 3 for bug 846704

For me, running strace fprobe localhost:5555 it ends with:

socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 3
bind(3, {sa_family=AF_UNSPEC, sa_data="\0\0\0\0\0\0\0\0\0\0\0\0\0\0"}, 16) = -1 EAFNOSUPPORT (Address family not supported by protocol)
write(2, "bind(): Address family not suppo"..., 49bind(): Address family not supported by protocol
) = 49
exit_group(1) = ?

Googling hints the problem have shown up recently in Gentoo as well.

http://www.linux-archive.org/gentoo-user/568758-fprobe-bind-address-family-not-supported-protocol.html