IllegalMonitorStateException

[phileo]

I received this crash report (Samsung SM-T530NU, OS v5.0.2), and I am wondering what does it mean. Is there an OS bug, or is there anything my application code can do to fix this crash?

Fatal Exception: java.lang.IllegalMonitorStateException: unlock of unowned monitor on object of type 'java.lang.reflect.ArtMethod' on thread 'Thread[1,tid=20169,Runnable,Thread*=0xb4f07800,peer=0x87368fb0,"main"]'
       at android.os.MessageQueue.next(MessageQueue.java:194)
       at android.os.Looper.loop(Looper.java:130)
       at android.app.ActivityThread.main(ActivityThread.java:6134)
       at java.lang.reflect.Method.invoke(Method.java)
       at java.lang.reflect.Method.invoke(Method.java:372)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1399)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1194)