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An error occurred while executing doInBackground()
java.lang.RuntimeException: An error occurred while executing doInBackground() at android.os.AsyncTask$3.done(AsyncTask.java:309) at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:354) at java.util.concurrent.FutureTask.setException(FutureTask.java:223) at java.util.concurrent.FutureTask.run(FutureTask.java:242) at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588) at java.lang.Thread.run(Thread.java:818)Caused by: java.lang.NullPointerException: Attempt to read from field 'int com.android.server.LockSettingsStorage$CredentialHash.version' on a null object reference at android.os.Parcel.readException(Parcel.java:1626) at android.os.Parcel.readException(Parcel.java:1573) at com.android.internal.widget.ILockSettings$Stub$Proxy.checkPassword(ILockSettings.java:525) at com.android.internal.widget.LockPatternUtils.checkPassword(LockPatternUtils.java:339) at com.android.internal.widget.LockPatternChecker$4.doInBackground(LockPatternChecker.java:165) at com.android.internal.widget.LockPatternChecker$4.doInBackground(LockPatternChecker.java:163) at android.os.AsyncTask$2.call(AsyncTask.java:295) at java.util.concurrent.FutureTask.run(FutureTask.java:237) ... 4 more