Misnamed struct field in inspect/2 causes infinite loop

[jdeisenberg]

Using Erlang/OTP 17, Interactive Elixir (0.14.3-dev)

Consider this code, with an error: colour in the structure is misspelled as color in inspect/2

defmodule Shirt do
  defstruct size: "M", colour: "green"
end

defimpl Inspect, for: Shirt do
  import Inspect.Algebra
  def inspect(item, _options) do
    msg = concat([item.size, break, item.color])
    pretty(msg, 80)
  end
end

Now do this:

iex(1)> c "shirt.ex"
[Inspect.Shirt, Shirt]
iex(2)> %Shirt{}

Crash dump was written to: erl_crash.dump
eheap_alloc: Cannot allocate 1098556536 bytes of memory (of type "heap").

If you put an IO.puts("testing") into the inspect/2 function, you will see that this is an infinite loop.