### Version 2.1.12 - March 23, 2018 ([Maven](http://search.maven.org/#artifactdetails%7Cio.reactivex.rxjava2%7Crxjava%7C2.1.12%7C)) #### Bugfixes - [Pull 5928](https://github.com/ReactiveX/RxJava/pull/5928): Fix `concatMapSingle` & `concatMapMaybe` dispose-cleanup crash.
