[jnigen] JNI DETECTED ERROR IN APPLICATION, null object

[jakub-pmp]

Hi,

Im using jnigen for the first time.
I have an exception: JNI DETECTED ERROR IN APPLICATION: can't call java.lang.String java.lang.Object.toString() on null object.
it is caused by calling:
final connectedDevice = deviceManager.getLastConnectedDeviceInfo(JObject.fromReference(Jni.getCurrentActivity()));.
getLastConnectedDeviceInfo java function is returning null when there is no last connected device to return. I tried wrap it in try catch block or to check connectedDevice.isNull but the exception is thrown while I'm calling that function. Is there a way to handle that situation?
For now I wrote additional function in Java which is a facade to that function and returns true/false instead of using original function.

Dart code:

  void initialize() async {
    removeCallback();
_managerCallback = DeviceManagerCallback.implement(this);
final localCallback = _managerCallback!;

deviceManager = await runOnPlatformThread<DeviceManager>(
        () => DeviceManager.getInstance(JObject.fromReference(Jni.getCurrentActivity()))
  ..addDeviceManagerCallback(localCallback),);

final connectedDevice = deviceManager.getLastConnectedDeviceInfo(JObject.fromReference(Jni.getCurrentActivity()));

if (connectedDevice.isNull) {
    startPairing();
  } else {
    startMeasurement();
  }

}

DeviceInfo:

import 'dart:core' show Object, String, bool, double, int;
import 'dart:core' as _$core;
import 'package:jni/_internal.dart' as _$jni;

import 'package:jni/jni.dart' as _$jni;
/// from: com.bp.bloodpressuresdk.DeviceInfo

class DeviceInfo extends $jni.JObject {

@$jni.internal

@_$core.override

final _$jni.JObjType $type;
@_$jni.internal

DeviceInfo.fromReference(

_$jni.JReference reference,

)   : $type = type,

super.fromReference(reference);
static final _class =

_$jni.JClass.forName(r'com/bp/bloodpressuresdk/DeviceInfo');
/// The type which includes information such as the signature of this class.

static const type = $DeviceInfo$Type();

static final _id_new$ = _class.constructorId(

r'(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V',

);
static final _new$ = _$jni.ProtectedJniExtensions.lookup<

_$jni.NativeFunction<

_$jni.JniResult Function(

$jni.Pointer<$jni.Void>,

_$jni.JMethodIDPtr,

_$jni.VarArgs<

(

$jni.Pointer<$jni.Void>,

$jni.Pointer<$jni.Void>,

$jni.Pointer<$jni.Void>,

$jni.Pointer<$jni.Void>,

$jni.Pointer<$jni.Void>

)>)>>('globalEnv_NewObject')

.asFunction<

_$jni.JniResult Function(

$jni.Pointer<$jni.Void>,

_$jni.JMethodIDPtr,

$jni.Pointer<$jni.Void>,

$jni.Pointer<$jni.Void>,

$jni.Pointer<$jni.Void>,

$jni.Pointer<$jni.Void>,

$jni.Pointer<$jni.Void>)>();
/// from: public void <init>(java.lang.String string, java.lang.String string1, java.lang.String string2, java.lang.String string3, java.lang.String string4)

/// The returned object must be released after use, by calling the [release] method.

factory DeviceInfo(

_$jni.JString string,

_$jni.JString string1,

_$jni.JString string2,

_$jni.JString string3,

_$jni.JString string4,

) {

return DeviceInfo.fromReference(_new$(

_class.reference.pointer,

_id_new$ as _$jni.JMethodIDPtr,

string.reference.pointer,

string1.reference.pointer,

string2.reference.pointer,

string3.reference.pointer,

string4.reference.pointer)

.reference);

}
static final _id_new$1 = _class.constructorId(

r'(Landroid/bluetooth/BluetoothDevice;)V',

);
static final _new$1 = _$jni.ProtectedJniExtensions.lookup<

_$jni.NativeFunction<

$jni.JniResult Function(

$jni.Pointer<$jni.Void>,

$jni.JMethodIDPtr,

$jni.VarArgs<($jni.Pointer<$jni.Void>,)>)>>(

'globalEnv_NewObject')

.asFunction<

$jni.JniResult Function($jni.Pointer<$jni.Void>,

_$jni.JMethodIDPtr, $jni.Pointer<$jni.Void>)>();
/// from: public void <init>(android.bluetooth.BluetoothDevice bluetoothDevice)

/// The returned object must be released after use, by calling the [release] method.

factory DeviceInfo.new$1(

_$jni.JObject bluetoothDevice,

) {

return DeviceInfo.fromReference(_new$1(_class.reference.pointer,

_id_new$1 as _$jni.JMethodIDPtr, bluetoothDevice.reference.pointer)

.reference);

}
static final _id_getAdvertisementDataName = _class.instanceMethodId(

r'getAdvertisementDataName',

r'()Ljava/lang/String;',

);
static final _getAdvertisementDataName = _$jni.ProtectedJniExtensions.lookup<

_$jni.NativeFunction<

_$jni.JniResult Function(

$jni.Pointer<$jni.Void>,

_$jni.JMethodIDPtr,

)>>('globalEnv_CallObjectMethod')

.asFunction<

_$jni.JniResult Function(

$jni.Pointer<$jni.Void>,

_$jni.JMethodIDPtr,

)>();
/// from: public java.lang.String getAdvertisementDataName()

/// The returned object must be released after use, by calling the [release] method.

_$jni.JString getAdvertisementDataName() {

return _getAdvertisementDataName(reference.pointer,

_id_getAdvertisementDataName as _$jni.JMethodIDPtr)

.object(const _$jni.JStringType());

}
static final _id_getAddress = _class.instanceMethodId(

r'getAddress',

r'()Ljava/lang/String;',

);
static final _getAddress = _$jni.ProtectedJniExtensions.lookup<

_$jni.NativeFunction<

_$jni.JniResult Function(

$jni.Pointer<$jni.Void>,

_$jni.JMethodIDPtr,

)>>('globalEnv_CallObjectMethod')

.asFunction<

_$jni.JniResult Function(

$jni.Pointer<$jni.Void>,

_$jni.JMethodIDPtr,

)>();
/// from: public java.lang.String getAddress()

/// The returned object must be released after use, by calling the [release] method.

_$jni.JString getAddress() {

return _getAddress(reference.pointer, _id_getAddress as _$jni.JMethodIDPtr)

.object(const _$jni.JStringType());

}
static final _id_getName = _class.instanceMethodId(

r'getName',

r'()Ljava/lang/String;',

);
static final _getName = _$jni.ProtectedJniExtensions.lookup<

_$jni.NativeFunction<

_$jni.JniResult Function(

$jni.Pointer<$jni.Void>,

_$jni.JMethodIDPtr,

)>>('globalEnv_CallObjectMethod')

.asFunction<

_$jni.JniResult Function(

$jni.Pointer<$jni.Void>,

_$jni.JMethodIDPtr,

)>();
/// from: public java.lang.String getName()

/// The returned object must be released after use, by calling the [release] method.

_$jni.JString getName() {

return _getName(reference.pointer, _id_getName as _$jni.JMethodIDPtr)

.object(const _$jni.JStringType());

}
static final _id_getProtocol = _class.instanceMethodId(

r'getProtocol',

r'()Ljava/lang/String;',

);
static final _getProtocol = _$jni.ProtectedJniExtensions.lookup<

_$jni.NativeFunction<

_$jni.JniResult Function(

$jni.Pointer<$jni.Void>,

_$jni.JMethodIDPtr,

)>>('globalEnv_CallObjectMethod')

.asFunction<

_$jni.JniResult Function(

$jni.Pointer<$jni.Void>,

_$jni.JMethodIDPtr,

)>();
/// from: public java.lang.String getProtocol()

/// The returned object must be released after use, by calling the [release] method.

_$jni.JString getProtocol() {

return _getProtocol(

reference.pointer, _id_getProtocol as _$jni.JMethodIDPtr)

.object(const _$jni.JStringType());

}
static final _id_getSerialNumber = _class.instanceMethodId(

r'getSerialNumber',

r'()Ljava/lang/String;',

);
static final _getSerialNumber = _$jni.ProtectedJniExtensions.lookup<

_$jni.NativeFunction<

_$jni.JniResult Function(

$jni.Pointer<$jni.Void>,

_$jni.JMethodIDPtr,

)>>('globalEnv_CallObjectMethod')

.asFunction<

_$jni.JniResult Function(

$jni.Pointer<$jni.Void>,

_$jni.JMethodIDPtr,

)>();
/// from: public java.lang.String getSerialNumber()

/// The returned object must be released after use, by calling the [release] method.

_$jni.JString getSerialNumber() {

return _getSerialNumber(

reference.pointer, _id_getSerialNumber as _$jni.JMethodIDPtr)

.object(const _$jni.JStringType());

}
static final _id_getBootId = _class.instanceMethodId(

r'getBootId',

r'()Ljava/lang/String;',

);
static final _getBootId = _$jni.ProtectedJniExtensions.lookup<

_$jni.NativeFunction<

_$jni.JniResult Function(

$jni.Pointer<$jni.Void>,

_$jni.JMethodIDPtr,

)>>('globalEnv_CallObjectMethod')

.asFunction<

_$jni.JniResult Function(

$jni.Pointer<$jni.Void>,

_$jni.JMethodIDPtr,

)>();
/// from: public java.lang.String getBootId()

/// The returned object must be released after use, by calling the [release] method.

_$jni.JString getBootId() {

return _getBootId(reference.pointer, _id_getBootId as _$jni.JMethodIDPtr)

.object(const _$jni.JStringType());

}
static final _id_getDeviceType = _class.instanceMethodId(

r'getDeviceType',

r'()Lcom/bp/bloodpressuresdk/DeviceType;',

);
static final _getDeviceType = _$jni.ProtectedJniExtensions.lookup<

_$jni.NativeFunction<

_$jni.JniResult Function(

$jni.Pointer<$jni.Void>,

_$jni.JMethodIDPtr,

)>>('globalEnv_CallObjectMethod')

.asFunction<

_$jni.JniResult Function(

$jni.Pointer<$jni.Void>,

_$jni.JMethodIDPtr,

)>();
/// from: public com.bp.bloodpressuresdk.DeviceType getDeviceType()

/// The returned object must be released after use, by calling the [release] method.

_$jni.JObject getDeviceType() {

return _getDeviceType(

reference.pointer, _id_getDeviceType as _$jni.JMethodIDPtr)

.object(const _$jni.JObjectType());

}
static final _id_getAtsStandard = _class.instanceMethodId(

r'getAtsStandard',

r'()Lcom/bp/bloodpressuresdk/AtsStandard;',

);
static final _getAtsStandard = _$jni.ProtectedJniExtensions.lookup<

_$jni.NativeFunction<

_$jni.JniResult Function(

$jni.Pointer<$jni.Void>,

_$jni.JMethodIDPtr,

)>>('globalEnv_CallObjectMethod')

.asFunction<

_$jni.JniResult Function(

$jni.Pointer<$jni.Void>,

_$jni.JMethodIDPtr,

)>();
/// from: public com.bp.bloodpressuresdk.AtsStandard getAtsStandard()

/// The returned object must be released after use, by calling the [release] method.

_$jni.JObject getAtsStandard() {

return _getAtsStandard(

reference.pointer, _id_getAtsStandard as _$jni.JMethodIDPtr)

.object(const _$jni.JObjectType());

}
static final _id_toString$1 = _class.instanceMethodId(

r'toString',

r'()Ljava/lang/String;',

);
static final _toString$1 = _$jni.ProtectedJniExtensions.lookup<

_$jni.NativeFunction<

_$jni.JniResult Function(

$jni.Pointer<$jni.Void>,

_$jni.JMethodIDPtr,

)>>('globalEnv_CallObjectMethod')

.asFunction<

_$jni.JniResult Function(

$jni.Pointer<$jni.Void>,

_$jni.JMethodIDPtr,

)>();
/// from: public java.lang.String toString()

/// The returned object must be released after use, by calling the [release] method.

_$jni.JString toString$1() {

return _toString$1(reference.pointer, _id_toString$1 as _$jni.JMethodIDPtr)

.object(const _$jni.JStringType());

}
static final _id_equals = _class.instanceMethodId(

r'equals',

r'(Ljava/lang/Object;)Z',

);
static final _equals = _$jni.ProtectedJniExtensions.lookup<

_$jni.NativeFunction<

$jni.JniResult Function(

$jni.Pointer<$jni.Void>,

$jni.JMethodIDPtr,

$jni.VarArgs<($jni.Pointer<$jni.Void>,)>)>>(

'globalEnv_CallBooleanMethod')

.asFunction<

$jni.JniResult Function($jni.Pointer<$jni.Void>,

_$jni.JMethodIDPtr, $jni.Pointer<$jni.Void>)>();
/// from: public boolean equals(java.lang.Object object)

bool equals(

_$jni.JObject object,

) {

return _equals(reference.pointer, _id_equals as _$jni.JMethodIDPtr,

object.reference.pointer)

.boolean;

}
static final _id_hashCode$1 = _class.instanceMethodId(

r'hashCode',

r'()I',

);
static final _hashCode$1 = _$jni.ProtectedJniExtensions.lookup<

_$jni.NativeFunction<

_$jni.JniResult Function(

$jni.Pointer<$jni.Void>,

_$jni.JMethodIDPtr,

)>>('globalEnv_CallIntMethod')

.asFunction<

_$jni.JniResult Function(

$jni.Pointer<$jni.Void>,

_$jni.JMethodIDPtr,

)>();
/// from: public int hashCode()

int hashCode$1() {

return _hashCode$1(reference.pointer, _id_hashCode$1 as _$jni.JMethodIDPtr)

.integer;

}

}
final class $DeviceInfo$Type extends $jni.JObjType {

@$jni.internal

const $DeviceInfo$Type();
@$jni.internal

@$core.override

String get signature => r'Lcom/bp/bloodpressuresdk/DeviceInfo;';
@$jni.internal

@$core.override

DeviceInfo fromReference(_$jni.JReference reference) =>

DeviceInfo.fromReference(reference);
@$jni.internal

@$core.override

_$jni.JObjType get superType => const _$jni.JObjectType();
@$jni.internal

@$core.override

final superCount = 1;
@_$core.override

int get hashCode => ($DeviceInfo$Type).hashCode;
@_$core.override

bool operator ==(Object other) {

return other.runtimeType == ($DeviceInfo$Type) && other is $DeviceInfo$Type;

}

}

getLastConnectedDevicInfo in Java:

    public DeviceInfo getLastConnectedDeviceInfo(Context context) {
        Validator.ensureNotNull(context, "context");
        SharedPreferences myPreference = context.getSharedPreferences("com.myapp", 0);
        String address = myPreference.getString("deviceaddress", "");
        if (address.equals("")) {
            Logger.logDeviceManagerWarning("getLastConnectedDeviceInfo: SharedPreference not set");
            return null;
        } else {
            String name = myPreference.getString("deviceName", "");
            String protocol = myPreference.getString("deviceProtocol", "");
            String serialNumber = myPreference.getString("deviceSerialNumber", "");
            String advertisementDataName = myPreference.getString("deviceAdvertisementDataName", "");
            return new DeviceInfo(address, name, protocol, serialNumber, advertisementDataName);
        }
    }

Console log:

    F/nextgen.staging( 2451): java_vm_ext.cc:591] JNI DETECTED ERROR IN APPLICATION: can't call java.lang.String java.lang.Object.toString() on null object
F/nextgen.staging( 2451): java_vm_ext.cc:591]     in call to CallObjectMethodA
F/nextgen.staging( 2451): runtime.cc:691] Runtime aborting...
F/nextgen.staging( 2451): runtime.cc:691] Dumping all threads without mutator lock held
F/nextgen.staging( 2451): runtime.cc:691] All threads:
F/nextgen.staging( 2451): runtime.cc:691] DALVIK THREADS (63):
F/nextgen.staging( 2451): runtime.cc:691] "main" prio=10 tid=1 Native
F/nextgen.staging( 2451): runtime.cc:691]   | group="" sCount=1 ucsCount=0 flags=1 obj=0x72230cd8 self=0xb4000079ca21a2c0
F/nextgen.staging( 2451): runtime.cc:691]   | sysTid=2451 nice=-10 cgrp=top-app sched=0/0 handle=0x7c5e0d44f8
F/nextgen.staging( 2451): runtime.cc:691]   | state=S schedstat=( 1295472853 326322364 2285 ) utm=110 stm=18 core=2 HZ=100
F/nextgen.staging( 2451): runtime.cc:691]   | stack=0x7fcca6f000-0x7fcca71000 stackSize=8188KB
F/nextgen.staging( 2451): runtime.cc:691]   | held mutexes=
F/nextgen.staging( 2451): runtime.cc:691]   native: #00 pc 000b8658  /apex/com.android.runtime/lib64/bionic/libc.so (__epoll_pwait+8) (BuildId: a87908b48b368e6282bcc9f34bcfc28c)
F/nextgen.staging( 2451): runtime.cc:691]   native: #01 pc 000101d8  /system/lib64/libutils.so (android::Looper::pollOnce+204) (BuildId: 4ad4af87e8ab16b872cdbdaf84188131)
F/nextgen.staging( 2451): runtime.cc:691]   native: #02 pc 00183604  /system/lib64/libandroid_runtime.so (android::android_os_MessageQueue_nativePollOnce+44) (BuildId: c741d6d101847b558f8cdb0633f23335)
F/nextgen.staging( 2451): runtime.cc:691]   native: #03 pc 00377030  /apex/com.android.art/lib64/libart.so (art_quick_generic_jni_trampoline+144) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #04 pc 003605a4  /apex/com.android.art/lib64/libart.so (art_quick_invoke_stub+612) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #05 pc 004906b4  /apex/com.android.art/lib64/libart.so (bool art::interpreter::DoCall+1248) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #06 pc 0050a5d4  /apex/com.android.art/lib64/libart.so (void art::interpreter::ExecuteSwitchImplCpp+2380) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #07 pc 003797d8  /apex/com.android.art/lib64/libart.so (ExecuteSwitchImplAsm+8) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #08 pc 001fce24  /system/framework/framework.jar (android.os.MessageQueue.next)
F/nextgen.staging( 2451): runtime.cc:691]   native: #09 pc 0037cde0  /apex/com.android.art/lib64/libart.so (art::interpreter::Execute +356) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #10 pc 0049120c  /apex/com.android.art/lib64/libart.so (bool art::interpreter::DoCall+4152) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #11 pc 00509f94  /apex/com.android.art/lib64/libart.so (void art::interpreter::ExecuteSwitchImplCpp+780) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #12 pc 003797d8  /apex/com.android.art/lib64/libart.so (ExecuteSwitchImplAsm+8) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #13 pc 001fbe08  /system/framework/framework.jar (android.os.Looper.loopOnce)
F/nextgen.staging( 2451): runtime.cc:691]   native: #14 pc 0037cde0  /apex/com.android.art/lib64/libart.so (art::interpreter::Execute +356) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #15 pc 0049120c  /apex/com.android.art/lib64/libart.so (bool art::interpreter::DoCall+4152) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #16 pc 0050a2f8  /apex/com.android.art/lib64/libart.so (void art::interpreter::ExecuteSwitchImplCpp+1648) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #17 pc 003797d8  /apex/com.android.art/lib64/libart.so (ExecuteSwitchImplAsm+8) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #18 pc 001fc57c  /system/framework/framework.jar (android.os.Looper.loop)
F/nextgen.staging( 2451): runtime.cc:691]   native: #19 pc 0037cde0  /apex/com.android.art/lib64/libart.so (art::interpreter::Execute +356) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #20 pc 0049120c  /apex/com.android.art/lib64/libart.so (bool art::interpreter::DoCall+4152) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #21 pc 0050a2f8  /apex/com.android.art/lib64/libart.so (void art::interpreter::ExecuteSwitchImplCpp+1648) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #22 pc 003797d8  /apex/com.android.art/lib64/libart.so (ExecuteSwitchImplAsm+8) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #23 pc 001c3970  /system/framework/framework.jar (android.app.ActivityThread.main)
F/nextgen.staging( 2451): runtime.cc:691]   native: #24 pc 0037cde0  /apex/com.android.art/lib64/libart.so (art::interpreter::Execute +356) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #25 pc 0037c560  /apex/com.android.art/lib64/libart.so (artQuickToInterpreterBridge+672) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #26 pc 00377168  /apex/com.android.art/lib64/libart.so (art_quick_to_interpreter_bridge+88) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #27 pc 00360880  /apex/com.android.art/lib64/libart.so (art_quick_invoke_static_stub+640) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #28 pc 0026a904  /apex/com.android.art/lib64/libart.so (_jobject* art::InvokeMethod<8>+780) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #29 pc 0026a5e8  /apex/com.android.art/lib64/libart.so (art::Method_invoke +32) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #30 pc 00377030  /apex/com.android.art/lib64/libart.so (art_quick_generic_jni_trampoline+144) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #31 pc 003605a4  /apex/com.android.art/lib64/libart.so (art_quick_invoke_stub+612) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #32 pc 004906b4  /apex/com.android.art/lib64/libart.so (bool art::interpreter::DoCall+1248) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #33 pc 00509f94  /apex/com.android.art/lib64/libart.so (void art::interpreter::ExecuteSwitchImplCpp+780) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #34 pc 003797d8  /apex/com.android.art/lib64/libart.so (ExecuteSwitchImplAsm+8) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #35 pc 0050cd00  /system/framework/framework.jar (com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run)
F/nextgen.staging( 2451): runtime.cc:691]   native: #36 pc 0037cde0  /apex/com.android.art/lib64/libart.so (art::interpreter::Execute +356) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #37 pc 0037c560  /apex/com.android.art/lib64/libart.so (artQuickToInterpreterBridge+672) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #38 pc 00377168  /apex/com.android.art/lib64/libart.so (art_quick_to_interpreter_bridge+88) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   at android.os.MessageQueue.nativePollOnce(Native method)
F/nextgen.staging( 2451): runtime.cc:691]   at android.os.MessageQueue.next(MessageQueue.java:335)
F/nextgen.staging( 2451): runtime.cc:691]   at android.os.Looper.loopOnce(Looper.java:162)
F/nextgen.staging( 2451): runtime.cc:691]   at android.os.Looper.loop(Looper.java:294)
F/nextgen.staging( 2451): runtime.cc:691]   at android.app.ActivityThread.main(ActivityThread.java:8177)
F/nextgen.staging( 2451): runtime.cc:691]   at java.lang.reflect.Method.invoke(Native method)
F/nextgen.staging( 2451): runtime.cc:691]   at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:552)
F/nextgen.staging( 2451): runtime.cc:691]   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:971)
F/nextgen.staging( 2451): runtime.cc:691] 
F/nextgen.staging( 2451): runtime.cc:691] "ReferenceQueueDaemon" prio=5 tid=10 Waiting
F/nextgen.staging( 2451): runtime.cc:691]   | group="" sCount=1 ucsCount=0 flags=1 obj=0x14fc0330 self=0xb4000079ca242270
F/nextgen.staging( 2451): runtime.cc:691]   | sysTid=2464 nice=4 cgrp=top-app sched=0/0 handle=0x792da73cb0
F/nextgen.staging( 2451): runtime.cc:691]   | state=S schedstat=( 23068407 5189886 637 ) utm=0 stm=1 core=1 HZ=100
F/nextgen.staging( 2451): runtime.cc:691]   | stack=0x792d970000-0x792d972000 stackSize=1039KB
F/nextgen.staging( 2451): runtime.cc:691]   | held mutexes=
F/nextgen.staging( 2451): runtime.cc:691]   native: #00 pc 00062e1c  /apex/com.android.runtime/lib64/bionic/libc.so (syscall+28) (BuildId: a87908b48b368e6282bcc9f34bcfc28c)
F/nextgen.staging( 2451): runtime.cc:691]   native: #01 pc 0022cfac  /apex/com.android.art/lib64/libart.so (art::ConditionVariable::WaitHoldingLocks+140) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #02 pc 002baf6c  /apex/com.android.art/lib64/libart.so (art::Monitor::Wait+4808) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #03 pc 00377030  /apex/com.android.art/lib64/libart.so (art_quick_generic_jni_trampoline+144) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #04 pc 003605a4  /apex/com.android.art/lib64/libart.so (art_quick_invoke_stub+612) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #05 pc 004906b4  /apex/com.android.art/lib64/libart.so (bool art::interpreter::DoCall+1248) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #06 pc 00509f94  /apex/com.android.art/lib64/libart.so (void art::interpreter::ExecuteSwitchImplCpp+780) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #07 pc 003797d8  /apex/com.android.art/lib64/libart.so (ExecuteSwitchImplAsm+8) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #08 pc 000fdf70  /apex/com.android.art/javalib/core-oj.jar (java.lang.Object.wait)
F/nextgen.staging( 2451): runtime.cc:691]   native: #09 pc 0037cde0  /apex/com.android.art/lib64/libart.so (art::interpreter::Execute +356) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #10 pc 0049120c  /apex/com.android.art/lib64/libart.so (bool art::interpreter::DoCall+4152) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #11 pc 00509f94  /apex/com.android.art/lib64/libart.so (void art::interpreter::ExecuteSwitchImplCpp+780) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #12 pc 003797d8  /apex/com.android.art/lib64/libart.so (ExecuteSwitchImplAsm+8) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #13 pc 000fdf54  /apex/com.android.art/javalib/core-oj.jar (java.lang.Object.wait)
F/nextgen.staging( 2451): runtime.cc:691]   native: #14 pc 0037cde0  /apex/com.android.art/lib64/libart.so (art::interpreter::Execute +356) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #15 pc 0049120c  /apex/com.android.art/lib64/libart.so (bool art::interpreter::DoCall+4152) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #16 pc 00509f94  /apex/com.android.art/lib64/libart.so (void art::interpreter::ExecuteSwitchImplCpp+780) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #17 pc 003797d8  /apex/com.android.art/lib64/libart.so (ExecuteSwitchImplAsm+8) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #18 pc 0002bc00  /apex/com.android.art/javalib/core-libart.jar (java.lang.Daemons$ReferenceQueueDaemon.runInternal)
F/nextgen.staging( 2451): runtime.cc:691]   native: #19 pc 0037cde0  /apex/com.android.art/lib64/libart.so (art::interpreter::Execute +356) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #20 pc 0049120c  /apex/com.android.art/lib64/libart.so (bool art::interpreter::DoCall+4152) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #21 pc 00509f94  /apex/com.android.art/lib64/libart.so (void art::interpreter::ExecuteSwitchImplCpp+780) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #22 pc 003797d8  /apex/com.android.art/lib64/libart.so (ExecuteSwitchImplAsm+8) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #23 pc 0002ae3c  /apex/com.android.art/javalib/core-libart.jar (java.lang.Daemons$Daemon.run)
F/nextgen.staging( 2451): runtime.cc:691]   native: #24 pc 0037cde0  /apex/com.android.art/lib64/libart.so (art::interpreter::Execute +356) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #25 pc 0049120c  /apex/com.android.art/lib64/libart.so (bool art::interpreter::DoCall+4152) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #26 pc 0050aca4  /apex/com.android.art/lib64/libart.so (void art::interpreter::ExecuteSwitchImplCpp+4124) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #27 pc 003797d8  /apex/com.android.art/lib64/libart.so (ExecuteSwitchImplAsm+8) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #28 pc 0010ee0c  /apex/com.android.art/javalib/core-oj.jar (java.lang.Thread.run)
F/nextgen.staging( 2451): runtime.cc:691]   native: #29 pc 0037cde0  /apex/com.android.art/lib64/libart.so (art::interpreter::Execute +356) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #30 pc 0037c560  /apex/com.android.art/lib64/libart.so (artQuickToInterpreterBridge+672) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #31 pc 00377168  /apex/com.android.art/lib64/libart.so (art_quick_to_interpreter_bridge+88) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #32 pc 003605a4  /apex/com.android.art/lib64/libart.so (art_quick_invoke_stub+612) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #33 pc 0034b8a4  /apex/com.android.art/lib64/libart.so (art::ArtMethod::Invoke+144) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #34 pc 004f3e30  /apex/com.android.art/lib64/libart.so (art::Thread::CreateCallback+1888) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #35 pc 000cb6a8  /apex/com.android.runtime/lib64/bionic/libc.so (__pthread_start+208) (BuildId: a87908b48b368e6282bcc9f34bcfc28c)
F/nextgen.staging( 2451): runtime.cc:691]   native: #36 pc 0006821c  /apex/com.android.runtime/lib64/bionic/libc.so (__start_thread+64) (BuildId: a87908b48b368e6282bcc9f34bcfc28c)
F/nextgen.staging( 2451): runtime.cc:691]   at java.lang.Object.wait(Native method)
F/nextgen.staging( 2451): runtime.cc:691]   - waiting on <0x07b8a47e> (a java.lang.Class)
F/nextgen.staging( 2451): runtime.cc:691]   at java.lang.Object.wait(Object.java:386)
F/nextgen.staging( 2451): runtime.cc:691]   at java.lang.Object.wait(Object.java:524)
F/nextgen.staging( 2451): runtime.cc:691]   at java.lang.Daemons$ReferenceQueueDaemon.runInternal(Daemons.java:239)
F/nextgen.staging( 2451): runtime.cc:691]   - locked <0x07b8a47e> (a java.lang.Class)
F/nextgen.staging( 2451): runtime.cc:691]   at java.lang.Daemons$Daemon.run(Daemons.java:145)
F/nextgen.staging( 2451): runtime.cc:691]   at java.lang.Thread.run(Thread.java:1012)
F/nextgen.staging( 2451): runtime.cc:691] 
F/nextgen.staging( 2451): runtime.cc:691] "FinalizerDaemon" prio=5 tid=12 Waiting
F/nextgen.staging( 2451): runtime.cc:691]   | group="" sCount=1 ucsCount=0 flags=1 obj=0x14fc0420 self=0xb4000079ca243e40
F/nextgen.staging( 2451): runtime.cc:691]   | sysTid=2465 nice=4 cgrp=top-app sched=0/0 handle=0x792c969cb0
F/nextgen.staging( 2451): runtime.cc:691]   | state=S schedstat=( 17163668 1759875 37 ) utm=1 stm=0 core=2 HZ=100
F/nextgen.staging( 2451): runtime.cc:691]   | stack=0x792c866000-0x792c868000 stackSize=1039KB
F/nextgen.staging( 2451): runtime.cc:691]   | held mutexes=
F/nextgen.staging( 2451): runtime.cc:691]   native: #00 pc 00062e1c  /apex/com.android.runtime/lib64/bionic/libc.so (syscall+28) (BuildId: a87908b48b368e6282bcc9f34bcfc28c)
F/nextgen.staging( 2451): runtime.cc:691]   native: #01 pc 0022cfac  /apex/com.android.art/lib64/libart.so (art::ConditionVariable::WaitHoldingLocks+140) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #02 pc 002baf6c  /apex/com.android.art/lib64/libart.so (art::Monitor::Wait+4808) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #03 pc 00377030  /apex/com.android.art/lib64/libart.so (art_quick_generic_jni_trampoline+144) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #04 pc 003605a4  /apex/com.android.art/lib64/libart.so (art_quick_invoke_stub+612) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #05 pc 004906b4  /apex/com.android.art/lib64/libart.so (bool art::interpreter::DoCall+1248) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #06 pc 00509f94  /apex/com.android.art/lib64/libart.so (void art::interpreter::ExecuteSwitchImplCpp+780) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #07 pc 003797d8  /apex/com.android.art/lib64/libart.so (ExecuteSwitchImplAsm+8) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #08 pc 000fdf70  /apex/com.android.art/javalib/core-oj.jar (java.lang.Object.wait)
F/nextgen.staging( 2451): runtime.cc:691]   native: #09 pc 0037cde0  /apex/com.android.art/lib64/libart.so (art::interpreter::Execute +356) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #10 pc 0049120c  /apex/com.android.art/lib64/libart.so (bool art::interpreter::DoCall+4152) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #11 pc 00509f94  /apex/com.android.art/lib64/libart.so (void art::interpreter::ExecuteSwitchImplCpp+780) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #12 pc 003797d8  /apex/com.android.art/lib64/libart.so (ExecuteSwitchImplAsm+8) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #13 pc 00122b0c  /apex/com.android.art/javalib/core-oj.jar (java.lang.ref.ReferenceQueue.remove)
F/nextgen.staging( 2451): runtime.cc:691]   native: #14 pc 0037cde0  /apex/com.android.art/lib64/libart.so (art::interpreter::Execute +356) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #15 pc 0049120c  /apex/com.android.art/lib64/libart.so (bool art::interpreter::DoCall+4152) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #16 pc 00509f94  /apex/com.android.art/lib64/libart.so (void art::interpreter::ExecuteSwitchImplCpp+780) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #17 pc 003797d8  /apex/com.android.art/lib64/libart.so (ExecuteSwitchImplAsm+8) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #18 pc 00122aec  /apex/com.android.art/javalib/core-oj.jar (java.lang.ref.ReferenceQueue.remove)
F/nextgen.staging( 2451): runtime.cc:691]   native: #19 pc 0037cde0  /apex/com.android.art/lib64/libart.so (art::interpreter::Execute +356) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #20 pc 0049120c  /apex/com.android.art/lib64/libart.so (bool art::interpreter::DoCall+4152) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #21 pc 00509f94  /apex/com.android.art/lib64/libart.so (void art::interpreter::ExecuteSwitchImplCpp+780) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #22 pc 003797d8  /apex/com.android.art/lib64/libart.so (ExecuteSwitchImplAsm+8) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #23 pc 0002b1d4  /apex/com.android.art/javalib/core-libart.jar (java.lang.Daemons$FinalizerDaemon.runInternal)
F/nextgen.staging( 2451): runtime.cc:691]   native: #24 pc 0037cde0  /apex/com.android.art/lib64/libart.so (art::interpreter::Execute +356) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #25 pc 0049120c  /apex/com.android.art/lib64/libart.so (bool art::interpreter::DoCall+4152) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #26 pc 00509f94  /apex/com.android.art/lib64/libart.so (void art::interpreter::ExecuteSwitchImplCpp+780) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #27 pc 003797d8  /apex/com.android.art/lib64/libart.so (ExecuteSwitchImplAsm+8) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #28 pc 0002ae3c  /apex/com.android.art/javalib/core-libart.jar (java.lang.Daemons$Daemon.run)
F/nextgen.staging( 2451): runtime.cc:691]   native: #29 pc 0037cde0  /apex/com.android.art/lib64/libart.so (art::interpreter::Execute +356) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #30 pc 0049120c  /apex/com.android.art/lib64/libart.so (bool art::interpreter::DoCall+4152) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #31 pc 0050aca4  /apex/com.android.art/lib64/libart.so (void art::interpreter::ExecuteSwitchImplCpp+4124) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #32 pc 003797d8  /apex/com.android.art/lib64/libart.so (ExecuteSwitchImplAsm+8) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #33 pc 0010ee0c  /apex/com.android.art/javalib/core-oj.jar (java.lang.Thread.run)
F/nextgen.staging( 2451): runtime.cc:691]   native: #34 pc 0037cde0  /apex/com.android.art/lib64/libart.so (art::interpreter::Execute +356) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #35 pc 0037c560  /apex/com.android.art/lib64/libart.so (artQuickToInterpreterBridge+672) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #36 pc 00377168  /apex/com.android.art/lib64/libart.so (art_quick_to_interpreter_bridge+88) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #37 pc 003605a4  /apex/com.android.art/lib64/libart.so (art_quick_invoke_stub+612) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #38 pc 0034b8a4  /apex/com.android.art/lib64/libart.so (art::ArtMethod::Invoke+144) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #39 pc 004f3e30  /apex/com.android.art/lib64/libart.so (art::Thread::CreateCallback+1888) (BuildId: b10f5696fea1b32039b162aef3850ed3)
F/nextgen.staging( 2451): runtime.cc:691]   native: #40 pc 000cb6a8  /apex/com.android.runtime/lib64/bionic/libc.so (__pthread_start+208) (BuildId: a87908b48b368e6282bcc9f34bcfc28c)
F/nextgen.staging( 2451): runtime.cc:691]   native: #41 pc 0006821c  /apex/com.android.runtime/lib64/bionic/libc.so (__start_thread+64) (BuildId: a87908b48b368e6282bcc9f34bcfc28c)
F/nextgen.staging( 2451): runtime.cc:691]   at java.lang.Object.wait(Native method)
F/nextgen.staging( 2451): runtime.cc:691]   - waiting on <0x03309ddf> (a java.lang.Object)
F/nextgen.staging( 2451): runtime.cc:691]   at java.lang.Object.wait(Object.java:386)
F/nextgen.staging( 2451): runtime.cc:691]   at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:210)
F/nextgen.staging( 2451): runtime.cc:691]   - locked <0x03309ddf> (a java.lang.Object)
F/nextgen.staging( 2451): runtime.cc:691]   at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:231)
F/nextgen.staging( 2451): runtime.cc:691]   at java.lang.Daemons$FinalizerDaemon.runInternal(Daemons.java:309)
F/nextgen.staging( 2451): runtime.cc:691]   at java.lang.Daemons$Daemon.run(Daemons.java:145)
F/nextgen.staging( 2451): runtime.cc:691]   at java.lang.Thread.run(Thread.java:1012)
F/nextgen.staging( 2451): runtime.cc:691] 
F/nextgen.staging( 2451): runtime.cc:691] "FinalizerWatchdogDaemon" prio=5 tid=13 Sleeping
F/nextgen.staging( 2451): runtime.cc:691]   | group="" sCount=1 ucsCount=0 flags=1 obj=0x14fc0498 self=0xb4000079ca23ead0
F/nextgen.staging( 2451): runtime.cc:691]   | sysTid=2466 nice=4 cgrp=top-app sched=0/0 handle=0x792c85fcb0
F/nextgen.staging( 2451): runtime.cc:691]   | state=S schedstat=( 2142876 4490376 38 ) utm=0 stm=0 core=2 HZ=100
F/nextgen.staging( 2451): runtime.cc:691]   | stack=0x792c75c000-0x792c75e000 stackSize=1039KB
F/nextgen.staging( 2451): runtime.cc:691]   | held mutexes=
F/nextgen.staging( 2451): runtime.cc:691]   native: #00 pc 00062e20  /apex/com.android.runtime/lib64/bionic/libc.so (syscall+32) (BuildId: a87908b48b368e6282bcc9f34bcfc28c)

[HosseinYousefi]

it is caused by calling:

Are you sure it's caused by that line? .toString() is being called on some null object somewhere in Dart. Maybe you're printing an object before checking if it's null.

[jakub-pmp]

Commenting out that line make app working without crashing. This is first time I'm calling that function and it's direct invocation of function generated by jnigen. I will check it again but unfortunately there is no breakpoint, app just crashes and debugger disconnects

[HosseinYousefi]

Another thing I notice is that in your stack trace, there is no mention of libdartjni. Could it be that your Java code itself uses JNI and that crashes?

You can change getLastConnectedDeviceInfo to print something and return null immediately to check.

[jakub-pmp]

Returning null directly also causes app crashes. I noticed that in generated DeviceInfo class app is calling this

  @_$jni.internal
  DeviceInfo.fromReference(
    _$jni.JReference reference,
  )   : $type = type,
        super.fromReference(reference);

Passed reference is JNullReference .

After adding log to getLastConnectedDeviceInfo before returning null object is working. I can see log message in console.

According to libdartjni it's here:

#08 pc 000000000000d938  /data/app/~~XtTOr8PekcHRQka11XDyuQ==/co.patientbuddy.tracker.nextgen.staging-sqND9fbWF4fiRuNNsJRt4w==/base.apk!libdartjni.so (offset 0x2198000) (globalEnv_CallObjectMethodA+64) (BuildId: 826e19a1b0d2a064696602e9cb70a4b2e4afd11f)

But only one call in entire log
crash_log.txt

I forgot to mention that majority of classes I'm trying to use are in .jar format but jnigen script is converting them and if object is not null then everything is fine.

Here is my yml:

 # jnigen.yaml
android_sdk_config:
  add_gradle_deps: true
output:

c:

library_name: bloodpressuresdk

path: src/

subdir: bloodpressuresdk/

dart:

path: lib/bp/sdk/

structure: package_structure
source_path:

'android/libs'
'android/app/src/main/java'

classes:

'com.bp.bloodpressuresdk.Device'
'com.bp.bloodpressuresdk.DeviceCallback'
'com.bp.bloodpressuresdk.DeviceInfo'
'com.bp.bloodpressuresdk.DeviceManager'
'com.bp.bloodpressuresdk.DeviceManagerCallback'
'com.bp.bloodpressuresdk.DeviceStatus'
'com.bp.bloodpressuresdk.DeviceType'
'utils.DeviceManagerUtils'

class_path:

'android/libs/classes.jar'

[HosseinYousefi]

My hunch is somehow something is calling toString, I will push a fix that toString of a null object is "null" and we can check if it fixes it. In general calling simple method shouldn't crash the application anyway.

I'm working on #1644 to generate null-safe bindings, this will eliminate all of these issues using the type system itself.

[HosseinYousefi]

Can you try depending on main branch and see if your problem is resolved?

#1693

Edit: now merged.

[jakub-pmp]

working, now. Thanks!

[HosseinYousefi]

Great! So it seems that your debugger was printing the object. Closing this.