### Precheck

* Do not use the issue tracker for help or support (try Elixir Forum, Stack Overflow, IRC, etc.)
* For proposing a new feature, please start a discussion on the Elixir Core mailing list: https://groups.google.com/group/elixir-lang-core
* For bugs, do a quick search and make sure the bug has not yet been reported
* Please disclose security vulnerabilities privately at elixir-security@googlegroups.com
* Finally, be nice and have fun!

### Environment

* Elixir & Erlang/OTP versions (elixir --version): 
* Operating system: 

### Current behavior

Include code samples, errors and stacktraces if appropriate.

### Expected behavior

A short description on how you expect the code to behave.
