gistfile1.txt

iex(1)> pid = spawn_link(fn -> receive do :foo -> :ok end end)
#PID<0.59.0>
iex(2)> monitor = Process.monitor(pid)
#Reference<0.0.6.73>

# Now make the spawned process go away
iex(4)> send(pid, :foo)
:foo
iex(5)> Process.alive?(pid)
false

# The current process' inbox now contains a DOWN message because it called Process.monitor() before
iex(7)> flush
{:DOWN, #Reference<0.0.6.73>, :process, #PID<0.59.0>, :normal}
:ok