**Please copy the following template [here](https://github.com/ReactiveX/RxSwift/issues/new) and fill in the missing fields so we can help you as soon as possible.**

**If you don't have something to report in the following format, maybe you don't really have an issue an it's easier and faster to resolve doubts in [slack channel](http://http://slack.rxswift.org/) first.**

```
*Short description*:

  description here

*Code that reproduces the issue*:

  code goes here

*Xcode version*:

  Xcode version goes here

*Expected outcome*:

  what do you expect to happen goes here

*What actually happens*:

  what actually happens goes here

// filling additional information below is optional, but resolving your issue could be potentially a lot faster

*Integration method*:
  (so we don't lose time investigating wrong integration)
  * CocoaPods
  * Carthage
  * Git submodules

*I have multiple versions of Xcode installed*:
  (so we can understand can this cause your issue)
  * yes (which ones)
  * no

*How long have I been using this project*:
  (this is so we can understand your level of knowledge
    and formulate the response in an appropriate manner)
  * just starting
  * I have a small code base
  * I have a significant code base


```