elixir-lang/elixir — pull request #1107 by mururu (2013-05-23 15:47:46+00:00)
Title: Fix missing unused private function and add test for warning

```
defmodule Sample1 do
def a, do: b
defp b, do: nil
defp c(x // 1), do: x
end
```

This should emit a warning.

And tests for such warnings.