When you try to autocomplete a module but have incorrectly capitalized it, it outputs an error to the console, e.g.
iex(2)> EFfDB.
17:09:28.708 [error] Loading of _build/dev/lib/eff_db/ebin/Elixir.EFfDB.beam failed: :badfile
When the module doesn't exist, no error is logged to the console. The issue isn't with IEx
it's only manifesting there,