crash in old MT (6 aka Torma) on Yota/Android 5

[dooreelko]

java.lang.RuntimeException: Unable to destroy activity {com.meditationtracker/com.meditationtracker.PracticeActivity}: java.lang.IllegalArgumentException: Receiver not registered: android.app.Activity$1@383463ac
at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:3696)
at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:3714)
at android.app.ActivityThread.access$1400(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1332)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5246)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Caused by: java.lang.IllegalArgumentException: Receiver not registered: android.app.Activity$1@383463ac
at android.app.LoadedApk.forgetReceiverDispatcher(LoadedApk.java:760)
at android.app.ContextImpl.unregisterReceiver(ContextImpl.java:1680)
at android.app.Activity.onDestroy(Activity.java:1652)
at android.app.Activity.performDestroy(Activity.java:6179)
at android.app.Instrumentation.callActivityOnDestroy(Instrumentation.java:1140)
at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:3683)
... 10 more