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java.lang.NullPointerException: Attempt to invoke a virtual method on a null object reference at com.antfortune.freeline.FreelineCore.getApkBuildFlag(FreelineCore.java:156) at com.antfortune.freeline.FreelineCore.getUuid(FreelineCore.java:406) at com.antfortune.freeline.FreelineReceiver.onReceive(FreelineReceiver.java:36) at android.app.ActivityThread.handleReceiver(ActivityThread.java:2749) at android.app.ActivityThread.access$1700(ActivityThread.java:169) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1500) at android.os.Handler.dispatchMessage(Handler.java:111) at android.os.Looper.loop(Looper.java:194) at android.app.ActivityThread.main(ActivityThread.java:5546) 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:967) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:762)