just_crashing.ex

defmodule Crasher do
  def start do
    {:ok, _agent} = Agent.start_link 
      fn -> %{aa: 1, bb: 2, cc: 0, dd: 3} end,
      name: :crasher_agent
  end

  def show do
    Agent.get :crasher_agent, fn x -> x end
  end

  def crash do
    Agent.get :crasher_agent, fn dict ->
      Enum.map dict, fn {key, value} -> {key, 10 / value} end
    end
  end
end