Segfault in inline Try<IP> getIP(const std::string& hostname, int family)

We saw a segfault in production. Attaching the coredump, we see:

Core was generated by `/usr/local/sbin/mesos-slave --port=5051 --resources=cpus:23;mem:70298;ports:[31'.
Program terminated with signal 11, Segmentation fault.
#0 0x00007f639867c77e in free () from /lib64/libc.so.6
(gdb) bt
#0 0x00007f639867c77e in free () from /lib64/libc.so.6
#1 0x00007f63986c25d0 in freeaddrinfo () from /lib64/libc.so.6
#2 0x00007f6399deeafa in net::getIP (hostname="<redacted>", family=2) at ./3rdparty/stout/include/stout/net.hpp:201
#3 0x00007f6399e1f273 in process::initialize (delegate=Unhandled dwarf expression opcode 0xf3
) at src/process.cpp:837
#4 0x000000000042342f in main ()