Sample app crashes when you rotate phone

[jt-gilkeson]

Process: com.ashokvarma.bottomnavigation.sample, PID: 985
java.lang.IllegalArgumentException: Parameter specified as non-null is null: method kotlin.jvm.internal.Intrinsics.checkParameterIsNotNull, parameter view
at com.ashokvarma.bottomnavigation.sample.HomeActivity.onItemSelected(HomeActivity.kt)
at android.widget.AdapterView.fireOnSelected(AdapterView.java:931)