camatcode

iex(1)> defmodule Hello do
...(1)> def do_work(i) when Integer.is_even(i), do: i
...(1)> end
error: cannot invoke remote function Integer.is_even/1 inside a guard
└─ iex:2: Hello.do_work/1

** (CompileError) iex: cannot compile module Hello (errors have been logged)
    (elixir 1.18.3) src/elixir_expand.erl:683: :elixir_expand.expand_arg/3
    (elixir 1.18.3) src/elixir_expand.erl:615: :elixir_expand.expand_list/5
    (elixir 1.18.3) src/elixir_expand.erl:523: :elixir_expand.expand/3