iOS 13 App built on Xcode 11 Crashes when receiving call if the app is on background or killed

[fmonsalvo]

Description

I have a react-native application that use a home built component to handle Twilio communication. We have upgraded to latest 5.x twilio iOS SDK and latest Android SDK. On Android it works great. On iOS the calls work perfect when the app is in foreground but it fails when the app is killed and the phone locked. I followed all the issues and the migration guides to no avail. I'm sure there's something wrong in the code as I'm experiencing what is described in issue #251 but I'm not sure what's wrong. When the phone is killed pushRegistry:didReceiveIncomingPushWithPayload:forType:withCompletionHandler is never called and then I get an error saying Killing VoIP app <private> because it failed to post an incoming call in time.

Steps to Reproduce

1. Launch application in iphone with iOS 13.x and log in. Make sure Twilio is registered
2. Kill the app and lock the phone
3. Call the locked phone.
4. Application starts in XCode Debug, but is killed with Killing VoIP app <private> because it failed to post an incoming call in time. Error.

Expected Behavior

That I receive a call

Actual Behavior

Nothing happens.

Reproduces How Often

Always

Versions

Voice iOS SDK

5.1.1

Xcode

11.3.1

iOS Version

13.3.1

iOS Device

iPhone 6s Plus

[bobiechen-twilio]

Hi @fmonsalvo

The message clearly indicates that the VoIP push is not properly reported as a CallKit incoming call according to the policy. While we do not provide any React Native sample app, please follow the quickstart and ensure that your application is performing registration to only subscribe to the call notifications and always report VoIP push notifications to CallKit.

[fmonsalvo]

Hi @bchen-twilio can I send you the code for some help?

[bobiechen-twilio]

Hi @fmonsalvo

You can use the quickstart sample code and check if your app implementation is following the PushKit/CallKit policy:

1. As soon as the app receives a VoIP push, pass it to the Voice SDK. [code]
2. The SDK will synchronously return a TVOCallInvite object in the callInviteReceived: callback. Report a new incoming call to CallKit immediately. [code]
3. As soon as the call is reported to CallKit, finish the sequence by calling the completion of the PushKit callback. [code]

[fmonsalvo]

@bchen-twilio that's exactly what I'm doing. What I did notice is that pushRegistry:didReceiveIncomingPushWithPayload:forType:completion is not called when the app is awaken by the call.

[bobiechen-twilio]

@fmonsalvo Can you check and make sure that the lifecycle of the PkPushRegistry instance starts as soon as the app is launched? Ideally it should be initialized in the app-delegate instance or in the root UI component in order to respond to the incoming notification events properly.

[fmonsalvo]

The PKPushRegistry is not stated when the app starts but it gets started before getting any call. I can try and move the initialization to the start of the app. I'll keep you posted.

[fmonsalvo]

Hi @bchen-twilio I just moved the registration to the initialization of the app. didReceiveIncomingPushWithPayload gets called and then I call:

[self.callKitProvider reportNewIncomingCallWithUUID:uuid update:callUpdate completion:^(NSError *error) {
        if (!error) {
            NSLog(@"Incoming call successfully reported.");
        }
        else {
            NSLog(@"Failed to report incoming call successfully: %@.", [error localizedDescription]);
        }
    }];

But I'm still getting the same issue. The app gets terminated even if the call is reported to callkit. Any idea?

[bobiechen-twilio]

@fmonsalvo

Upon receiving the didReceiveIncomingPushWithPayload callback, you should call TwilioVoice.handleNotification() with the notification payload then report the call to CallKit in the TVONotificationDelegate.callInviteReceived callback.

The most important idea is to report the call and signal the completion before the method finishes:

- (void)pushRegistry:(PKPushRegistry *)registry
didReceiveIncomingPushWithPayload:(PKPushPayload *)payload
             forType:(PKPushType)type
withCompletionHandler:(void (^)(void))completion {
    if ([type isEqualToString:PKPushTypeVoIP]) {
        if (![TwilioVoice handleNotification:payload.dictionaryPayload delegate:self delegateQueue:nil]) {
            NSLog(@"This is not a valid Twilio Voice notification.");
        }
    }

    if ([[[UIDevice currentDevice] systemVersion] floatValue] < 13.0) {
        // Save for later when the notification is properly handled.
        self.incomingPushCompletionCallback = completion;
    } else {
        /**
        * The Voice SDK processes the call notification and returns the call invite synchronously. Report the incoming call to
        * CallKit and fulfill the completion before exiting this callback method.
        */
        completion();
    }
}

[fmonsalvo]

That's exactly what I'm doing here:

- (void)pushRegistry:(PKPushRegistry *)registry didReceiveIncomingPushWithPayload:(PKPushPayload *)payload forType:(NSString *)type withCompletionHandler:(void (^)(void))completion {
  NSLog(@"pushRegistry:didReceiveIncomingPushWithPayload:forType");

    NSLog(@"pushRegistry:didReceiveIncomingPushWithPayload:forType:withCompletionHandler:");

    // Save for later when the notification is properly handled.
    self.incomingPushCompletionCallback = completion;

    if ([type isEqualToString:PKPushTypeVoIP]) {
        // The Voice SDK will use main queue to invoke `cancelledCallInviteReceived:error` when delegate queue is not passed
        if (![TwilioVoice handleNotification:payload.dictionaryPayload delegate:self delegateQueue:nil]) {
            NSLog(@"This is not a valid Twilio Voice notification.");
        }
    }
    if ([[NSProcessInfo processInfo] operatingSystemVersion].majorVersion < 13) {
        // Save for later when the notification is properly handled.
        self.incomingPushCompletionCallback = completion;
    } else {
        /**
        * The Voice SDK processes the call notification and returns the call invite synchronously. Report the incoming call to
        * CallKit and fulfill the completion before exiting this callback method.
        */
        completion();
    }
}

and this is the method being called in the callback:

- (void)reportIncomingCallFrom:(NSString *)from withUUID:(NSUUID *)uuid {
  CXHandle *callHandle = [[CXHandle alloc] initWithType:CXHandleTypeGeneric value:from];

  CXCallUpdate *callUpdate = [[CXCallUpdate alloc] init];
  callUpdate.remoteHandle = callHandle;
  callUpdate.supportsDTMF = YES;
  callUpdate.supportsHolding = YES;
  callUpdate.supportsGrouping = NO;
  callUpdate.supportsUngrouping = NO;
  callUpdate.hasVideo = NO;

  if ([from containsString:@"client:"]) {
    callUpdate.localizedCallerName = @"Seguridad";
  } else {
    callUpdate.localizedCallerName = @"Visitante";
  }

  [self.callKitProvider reportNewIncomingCallWithUUID:uuid update:callUpdate completion:^(NSError *error) {
    if (!error) {
      NSLog(@"Incoming call successfully reported");

    } else {
      NSLog(@"Failed to report incoming call successfully: %@.", [error localizedDescription]);
    }
  }];
}

[bobiechen-twilio]

Hi @fmonsalvo

Thanks for providing the code snippet. Is there a way for you to print out debug messages to see if the path is executed all the way until the PushKit completion is called?

Did you also check the React Native dev forum and see if there is any discussion about the background issue? I have a feeling that this has something to do with how React Native handles the app lifecycle especially when the app is not active.

[fmonsalvo]

Sure, I'll do that and I will also use the same library in a new application without any other library to see if it works. Thanks @bchen-twilio

[fmonsalvo]

@bchen-twilio one more thing I discovered and it may be related, or not, but when I receive a call and the caller hangs out before I pickup the call stays alive on the receiver's end. Like it is not getting the disconnection event. Again, I'm not sure if it's related but wanted to let you know just in case.

[bobiechen-twilio]

Hi @fmonsalvo in this case you should receive the cancelledCallInviteReceived:error: callback in your app and request an end call request to CallKit here. Please provide a Call SID if you are not getting this callback in this scenario.

[fmonsalvo]

Hey @bchen-twilio I have rewritten the entire library following the quickstart very closely. I'm getting the cancelledCallInviteReceived being called now but the call does not hang up. I see that performEndCallActionWithUUID is being called, but the call is not completed. Any idea what might be happening?

[bobiechen-twilio]

Hi @fmonsalvo

Glad to hear that it's working now. Did you mean that CallKit keeps ringing when you call performEndCallActionWithUUID upon receiving the cancelledCallInviteReceived callback? Did you see any error when requesting the end-call transaction to CallKit?

[piyushtank]

@fmonsalvo Are you still running into the issue?

[hovaks]

Whoever wrote this example, should stop calling himself a swift developer, simply disgusting.

[fmonsalvo]

Hey @piyushtank I'm still experiencing the issue

[sojitrajayumedex]

Hey @bchen-twilio and @piyushtank I am also having the same issue and it's crashing application.

I have also used callkit for the application. I am using VOIP for TwilioVoice and TwilioVideo both framework.

Most of the time it's happening when user is in the background or gets registered on Twilio using the following method [TwilioVoice registerWithAccessToken: deviceTokenData: completion:] method.

In my case application is crashing only when I get multiple delayed notification altogether.

Let's take an example user is not logged in the application or not connected to internet and somebody is calling that user.

In this case when call will be dismissed from caller end as reciever is not available to respose the call. But as soon as user is getting login into the application and registered for VOIP he gets all pending voice call notification and somehow these notification is not handled properly and application gets crashed.

Following are the VOIP payload which I get when I login into the application.

2020-04-14 23:34:51.466506+0530 U-InTouch[996:151392] VoIP Payload : {
    aps =     {
    };
    "twi_account_sid" = ACCOUNT_SID;
    "twi_bridge_token" = "DELETED by @bchen-twilio";
    "twi_call_sid" = CA41c30b941d1f21e77192a7d8a894d6dc;
    "twi_from" = "client:sojitrajay";
    "twi_message_id" = RU0fba02b9851efbe58ad9c0dee1387e88;
    "twi_message_type" = "twilio.voice.call";
    "twi_to" = "client:frontrecp";
}

2020-04-14 23:34:51.495464+0530 U-InTouch[996:151392] VoIP Payload : {
    aps =     {
    };
    "twi_account_sid" = ACCOUNT_SID;
    "twi_bridge_token" = "DELETED by @bchen-twilio";
    "twi_call_sid" = CA498cb86bab53ca2b7fa6b275d386aeb2;
    "twi_from" = "client:sojitrajay";
    "twi_message_id" = RUe14c5d0289a9e0d689b90a087efb5ba5;
    "twi_message_type" = "twilio.voice.call";
    "twi_to" = "client:frontrecp";
}

2020-04-14 23:34:52.536393+0530 U-InTouch[996:151392] VoIP Payload : {
    aps =     {
    };
    "twi_account_sid" = ACCOUNT_SID;
    "twi_bridge_token" = "DELETED by @bchen-twilio";
    "twi_call_sid" = CA257c4f105547e0ba64bf5183456086bc;
    "twi_from" = "client:sojitrajay";
    "twi_message_id" = RU5d24f9c7f65a537314d2ccfaf8e81f04;
    "twi_message_type" = "twilio.voice.call";
    "twi_to" = "client:frontrecp";
}

In my case for video call we have added apns-expiration flag 30 seconds so user won't get any delayed notification and application won't crash.

So is there any way that we can pass expiration for Twilio audio call in the application so we can avoid this issue.

Please help me ASAP as until this issue doesn't resolve we can't release our application.

Also can you put this issue on high priority to we can release our application.

Please let me know if you need any further information.

[bobiechen-twilio]

Hi @sojitrajayumedex

Thanks for reporting the issue. I have updated your comment and masked the bridge tokens since they are sensitive information. The VoIP notification requests sent by Twilio are configured with 30-second TTL although it doesn't guarantee in some cases which we cannot control. Is it possible for the application to use the TwilioVoice.unregister() method when the user is logging out? That way we can guarantee the no unintended push notification is sent to the mobile client.

Thanks, -bobie

[sojitrajayumedex]

Hi @bchen-twilio Thanks for replying.

I got a reply for the support ticket that upgrading Twilio voice SDK 5.3.1 will help me. Do you think it will help me?

Although I have just now upgraded the SDK and I'll check this issue.

Is it possible for the application to use the TwilioVoice.unregister() method when the user is logging out?

No. User is not logging out from the application. Also it's facility to the user that they will get call even if they are logged in or not.

[bobiechen-twilio]

Hi @sojitrajayumedex

Although the issue is not due to different SDK version, we would still recommend using the latest one if applicable. I think I misunderstood the scenario when you said the issue happens when the user is logging in. In any case if the application receives a VoIP push notification, reporting to CallKit is the only option in iOS 13. The called mobile client will not be connected if they are trying to accept a call invite that has been canceled or ended.

[sojitrajayumedex]

No, you didn't misunderstand the issue.

The thing is we auto-login process in the application.

If the application is killed then the next time user gets auto-logged into the application and that's when user gets all these notifications together.

We have handled push notifications in the application and reported calls to call kit too as given below method.

- (void)pushRegistry:(PKPushRegistry *)registry
didReceiveIncomingPushWithPayload:(PKPushPayload *)payload
             forType:(PKPushType)type
withCompletionHandler:(void (^)(void))completion {

    if ([type isEqualToString:PKPushTypeVoIP]) {
        [TwilioVoice handleNotification:payload.dictionaryPayload
                               delegate:self delegateQueue:nil];
    }
    if ([[NSProcessInfo processInfo] operatingSystemVersion].majorVersion < 13) {
        // Save for later when the notification is properly handled.
        self.incomingPushCompletionCallback = completion;
    } else {
        /**
         * The Voice SDK processes the call notification and returns the call invite synchronously. Report the incoming call to
         * CallKit and fulfill the completion before exiting this callback method.
         */
        completion();
    }
}

- (void)handleCallInviteReceived:(TVOCallInvite *)callInvite {
    NSLog(@"callInviteReceived:");

    if (self.callInvite) {
        NSLog(@"A CallInvite is already in progress. Ignoring the incoming CallInvite from %@", callInvite.from);
        if ([[NSProcessInfo processInfo] operatingSystemVersion].majorVersion < 13) {
            [self incomingPushHandled];
        }
        return;
    } else if (self.call) {
        NSLog(@"Already an active call. Ignoring the incoming CallInvite from %@", callInvite.from);
        if ([[NSProcessInfo processInfo] operatingSystemVersion].majorVersion < 13) {
            [self incomingPushHandled];
        }
        return;
    }

    .....

}

- (void)handleCallInviteCanceled:(TVOCallInvite *)callInvite {
    NSLog(@"callInviteCanceled:");

    [self performEndCallActionWithUUID:callInvite.uuid];
    self.callInvite = nil;
    [self incomingPushHandled];
}

- (void)performAnswerVoiceCallWithUUID:(NSUUID *)uuid
                            completion:(void(^)(BOOL success))completionHandler {

    self.call = [self.callInvite acceptWithDelegate:self];

   ....

    self.callInvite = nil;
    self.callKitCompletionCallback = completionHandler;
    [self incomingPushHandled];
}

- (void)incomingPushHandled {
    if (self.incomingPushCompletionCallback) {
        self.incomingPushCompletionCallback();
        self.incomingPushCompletionCallback = nil;
    }
}

Is there something wrong with this code?

[bobiechen-twilio]

Thanks for the update @sojitrajayumedex I don't see TwilioVoice.handleNotification() called in the didReceiveIncomingPushWithPayload callback method. Is it called somewhere else and is it intended? Also can you share what is the crash? I am assuming it's the exception thrown by iOS saying that the VoIP notification is not properly reported to CallKit as an incoming call within the scope of the didReceiveIncomingPushWithPayload callback, but just want to confirm.

-bobie

[sojitrajayumedex]

@bchen-twilio I didn't mention TwilioVoice.handleNotification() as I thought that is understandable. I've updated code please check.

Also can you share what is the crash?

Please check the following crash log.

2020-04-16 17:15:36.887933+0530 [361:26795] callInviteReceived:
2020-04-16 17:15:36.887982+0530 [361:26795] A CallInvite is already in progress. Ignoring the incoming CallInvite from client:922565
2020-04-16 17:15:37.914802+0530 [361:26795] Apps receving VoIP pushes must post an incoming call (via CallKit or IncomingCallNotifications) in the same run loop as   pushRegistry:didReceiveIncomingPushWithPayload:forType:[withCompletionHandler:] without delay.
2020-04-16 17:15:37.914883+0530 [361:26795] *** Assertion failure in -[PKPushRegistry _terminateAppIfThereAreUnhandledVoIPPushes], /BuildRoot/Library/Caches/com.apple.xbs/Sources/PushKit/PushKit-37/PKPushRegistry.m:343

[bobiechen-twilio]

Hi @sojitrajayumedex

The exception message clearly suggests that the application is not reporting to CallKit within the scope of the didReceiveIncomingPushWithPayload callback. When the application calls TwilioVoice.handleNotification(), the SDK will raise the callInviteReceived: callback synchronously and the application needs to tell CallKit about the new incoming call also synchronously before the dispatch queue exits the callback method.

Please follow the flow in the quickstart and make sure you are following the PushKit/CallKit policy.

Thanks, -bobie

[sojitrajayumedex]

@bchen-twilio I've already handled all the callbacks synchronously.

My only concern is why I'm getting notification after more than 3-5 hours if notification expiry is 30 seconds. If I won't get a notification then I don't have this issue at all. It's very serious now. We have to already release the app but it's crashing which can not help us.

Please help us.

[bobiechen-twilio]

Hi @sojitrajayumedex

Thanks for the clarification. Since Twilio doesn't have control of the notification delivery timing once the request is has been sent to APN, our recommendation is to:

• Move the initialization and setup of the PkPushRegistry instance to app-delegate to make sure that the app always receives and handles the VoIP push notifications regardless of the time they are delivered. You can check out the quickstart example here: https://github.com/twilio/voice-quickstart-ios/blob/master/ObjcVoiceQuickstart/AppDelegate.m#L27
• Report to CallKit immediately, which I believe the application has already done a good job.

In any case if your app is still receiving VoIP call notifications with significant delay, please feel free to reach to us with the Twilio Call SIDs.

Hope this helps.

-bobie

[sojitrajayumedex]

@bchen-twilio thanks for your quick reply.

• I have already implemented it on the AppDelegate. Code is in this comment https://github.com/twilio/voice-quickstart-ios/issues/308#issuecomment-614210246
  • Following are the call ID which were repored with delay.
    1. CA41c30b941d1f21e77192a7d8a894d6dc
    2. CA498cb86bab53ca2b7fa6b275d386aeb2
    3. CA257c4f105547e0ba64bf5183456086bc

Please let me know if you need any further information.

[bobiechen-twilio]

Hi @sojitrajayumedex

I have checked the Call SIDs again and confirmed that the call notifications (requests) were sent, 2 iOS devices and 1 Android device with GCM service, at the time when the calls were made. From what I can see, the notification requests to APN were all successful.

[sojitrajayumedex]

Yes @bchen-twilio . You’re right even I know that. But the issue is I’m getting delayed notification and which is crashing app.

We’ve used Twilio Nofify API for separate video call notification with apns-expiry 30 seconds which is not sending delayed notification.

I think there is something which needs to checked for voice call notification. If I’m not wrong might be possible to make voice call efficient notifications can send by anykind if caching mechanism which delivers it guaranteed? And which is making this issue?

[bobiechen-twilio]

Hi @sojitrajayumedex Is there any reason the app is not reporting to CallKit in this case? I am not really the expert of how the VoIP Push system is implemented but it seems like somehow Apple handles VoIP differently than the regular APNS notifications in order to ensure delivery robustness.

[sojitrajayumedex]

Yes @bchen-twilio I think in the same way.

Is there any reason the app is not reporting to CallKit in this case?

I've handled all the scenarios to report call to callkit when call comes. So don't know why the app is not reporting call to to callkit.

Even I am not expert of VOIP push system. Can you consult somebody for this issue who can resolve this issue?

[bobiechen-twilio]

Hi @sojitrajayumedex

Is this reproducible in your dev environment? Maybe we can pinpoint the scenario or even some specific device or client identity.

[roman-kot]

@bchen-twilio I've just commented there https://github.com/twilio/twilio-voice-ios/issues/28#issuecomment-623125731 I reproduced it the very first time I tried to answer incoming call after having app killed first.

[bobiechen-twilio]

Hi @roman-kot

Please provide the stacktrace (if possible) when the crash happened. Also just curious, are you also using the React Native framework to build your application?

[roman-kot]

@bchen-twilio I was debugging a React Native app first, yes. But then I discovered the same in ObjCVoiceQuickstart app.

CrashReporter Key:   da562dda53004b756ba9d762ee0326e67627b151
Hardware Model:      iPhone12,3
Process:             ObjCVoiceQuickstart [70456]
Path:                /private/var/containers/Bundle/Application/7A23E7B5-37B0-4C3F-853A-733C84B7727D/ObjCVoiceQuickstart.app/ObjCVoiceQuickstart
Identifier:          XXX
Version:             1 (1.0)
Code Type:           ARM-64 (Native)
Role:                Foreground
Parent Process:      launchd [1]
Coalition:           XXX [22704]

Date/Time:           2020-05-03 16:08:31.6964 +0200
Launch Time:         2020-05-03 16:08:31.5896 +0200
OS Version:          iPhone OS 13.3.1 (17D50)
Release Type:        User
Baseband Version:    1.04.06
Report Version:      104

Exception Type:  EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note:  EXC_CORPSE_NOTIFY
Triggered by Thread:  0

Last Exception Backtrace:
0   CoreFoundation                  0x1a11e496c __exceptionPreprocess + 224
1   libobjc.A.dylib                 0x1a0efd028 objc_exception_throw + 59
2   CoreFoundation                  0x1a10e2dcc -[NSObject+ 200140 (NSObject) doesNotRecognizeSelector:] + 143
3   CoreFoundation                  0x1a11e9048 ___forwarding___ + 1327
4   CoreFoundation                  0x1a11eb3a0 _CF_forwarding_prep_0 + 95
5   ObjCVoiceQuickstart             0x1048fd920 0x1048f4000 + 39200
6   ObjCVoiceQuickstart             0x104903254 0x1048f4000 + 62036
7   PushKit                         0x1b55565f4 __59-[PKPushRegistry voipRegistrationSucceededWithDeviceToken:]_block_invoke_2 + 147
8   libdispatch.dylib               0x1a0e88b7c _dispatch_call_block_and_release + 31
9   libdispatch.dylib               0x1a0e89fd8 _dispatch_client_callout + 19
10  libdispatch.dylib               0x1a0e95cc8 _dispatch_main_queue_callback_4CF + 967
11  CoreFoundation                  0x1a115fcc8 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 15
12  CoreFoundation                  0x1a115aa24 __CFRunLoopRun + 1979
13  CoreFoundation                  0x1a1159f40 CFRunLoopRunSpecific + 479
14  GraphicsServices                0x1ab3ea534 GSEventRunModal + 107
15  UIKitCore                       0x1a52e5580 UIApplicationMain + 1939
16  ObjCVoiceQuickstart             0x104903ae8 0x1048f4000 + 64232
17  libdyld.dylib                   0x1a0fd8e18 start + 3

Thread 0 name:  Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0   libsystem_kernel.dylib          0x00000001a0fceefc __pthread_kill + 8
1   libsystem_pthread.dylib         0x00000001a0eee8b8 pthread_kill + 228
2   libsystem_c.dylib               0x00000001a0e7ea74 abort + 104
3   libc++abi.dylib                 0x00000001a0f963c8 __cxa_bad_cast + 0
4   libc++abi.dylib                 0x00000001a0f965c0 demangling_unexpected_handler+ 5568 () + 0
5   libobjc.A.dylib                 0x00000001a0efd308 _objc_terminate+ 25352 () + 124
6   libc++abi.dylib                 0x00000001a0fa3634 std::__terminate(void (*)+ 58932 ()) + 20
7   libc++abi.dylib                 0x00000001a0fa35c0 std::terminate+ 58816 () + 44
8   libdispatch.dylib               0x00000001a0e89fec _dispatch_client_callout + 40
9   libdispatch.dylib               0x00000001a0e95cc8 _dispatch_main_queue_callback_4CF + 968
10  CoreFoundation                  0x00000001a115fcc8 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 16
11  CoreFoundation                  0x00000001a115aa24 __CFRunLoopRun + 1980
12  CoreFoundation                  0x00000001a1159f40 CFRunLoopRunSpecific + 480
13  GraphicsServices                0x00000001ab3ea534 GSEventRunModal + 108
14  UIKitCore                       0x00000001a52e5580 UIApplicationMain + 1940
15  ObjCVoiceQuickstart             0x0000000104903ae8 0x1048f4000 + 64232
16  libdyld.dylib                   0x00000001a0fd8e18 start + 4

Thread 1:
0   libsystem_pthread.dylib         0x00000001a0ef59e0 start_wqthread + 0

Thread 2:
0   libsystem_pthread.dylib         0x00000001a0ef59e0 start_wqthread + 0

Thread 3:
0   libsystem_pthread.dylib         0x00000001a0ef59e0 start_wqthread + 0

Thread 4:
0   libsystem_pthread.dylib         0x00000001a0ef59e0 start_wqthread + 0

Thread 5 name:  com.apple.uikit.eventfetch-thread
Thread 5:
0   libsystem_kernel.dylib          0x00000001a0facc04 mach_msg_trap + 8
1   libsystem_kernel.dylib          0x00000001a0fac020 mach_msg + 76
2   CoreFoundation                  0x00000001a115f964 __CFRunLoopServiceMachPort + 220
3   CoreFoundation                  0x00000001a115a7fc __CFRunLoopRun + 1428
4   CoreFoundation                  0x00000001a1159f40 CFRunLoopRunSpecific + 480
5   Foundation                      0x00000001a149f340 -[NSRunLoop+ 33600 (NSRunLoop) runMode:beforeDate:] + 232
6   Foundation                      0x00000001a149f218 -[NSRunLoop+ 33304 (NSRunLoop) runUntilDate:] + 92
7   UIKitCore                       0x00000001a5380e9c -[UIEventFetcher threadMain] + 156
8   Foundation                      0x00000001a149dfa4 -[NSThread main] + 40
9   Foundation                      0x00000001a15d9a74 __NSThread__start__ + 852
10  libsystem_pthread.dylib         0x00000001a0eed840 _pthread_start + 168
11  libsystem_pthread.dylib         0x00000001a0ef59f4 thread_start + 8

Thread 6:
0   libsystem_pthread.dylib         0x00000001a0ef59e0 start_wqthread + 0

Thread 7:
0   libsystem_pthread.dylib         0x00000001a0ef59e0 start_wqthread + 0

Thread 8 name:  AVAudioSession Notify Thread
Thread 8:
0   libsystem_kernel.dylib          0x00000001a0facc04 mach_msg_trap + 8
1   libsystem_kernel.dylib          0x00000001a0fac020 mach_msg + 76
2   CoreFoundation                  0x00000001a115f964 __CFRunLoopServiceMachPort + 220
3   CoreFoundation                  0x00000001a115a7fc __CFRunLoopRun + 1428
4   CoreFoundation                  0x00000001a1159f40 CFRunLoopRunSpecific + 480
5   AVFAudio                        0x00000001ae101f70 GenericRunLoopThread::Entry+ 421744 (void*) + 160
6   AVFAudio                        0x00000001ae1531fc CAPThread::Entry+ 754172 (CAPThread*) + 208
7   libsystem_pthread.dylib         0x00000001a0eed840 _pthread_start + 168
8   libsystem_pthread.dylib         0x00000001a0ef59f4 thread_start + 8

Thread 0 crashed with ARM Thread State (64-bit):
    x0: 0x0000000000000000   x1: 0x0000000000000000   x2: 0x0000000000000000   x3: 0x0000000000000000
    x4: 0x000000016b50a090   x5: 0x000000016b50a640   x6: 0x000000000000006e   x7: 0x0000000000000800
    x8: 0x00000000000005b9   x9: 0xb3a89f0645d54160  x10: 0x0000000000000002  x11: 0x0000000000000003
   x12: 0x0000000000000000  x13: 0x000000000000005a  x14: 0x0000000000000010  x15: 0x0000000000000000
   x16: 0x0000000000000148  x17: 0x00000001df6daf10  x18: 0x0000000000000000  x19: 0x0000000000000006
   x20: 0x0000000000000507  x21: 0x0000000104b75920  x22: 0x0000000283cd7280  x23: 0x0000000000000000
   x24: 0x0000000002ffffff  x25: 0x0000000104b75920  x26: 0x00000000000020ff  x27: 0x0000000000000114
   x28: 0x0000000283caea00   fp: 0x000000016b50a5a0   lr: 0x00000001a0eee8b8
    sp: 0x000000016b50a580   pc: 0x00000001a0fceefc cpsr: 0x40000000
   esr: 0x56000080  Address size fault

Binary Images:
0x1048f4000 - 0x104907fff ObjCVoiceQuickstart arm64  <a21849a437883217b206289c189436ab> /var/containers/Bundle/Application/7A23E7B5-37B0-4C3F-853A-733C84B7727D/ObjCVoiceQuickstart.app/ObjCVoiceQuickstart
0x104b04000 - 0x104b6bfff dyld arm64e  <e008b93875933f57b94a747bc6c3beb5> /usr/lib/dyld
0x104be8000 - 0x1051f3fff TwilioVoice arm64  <586d49e123153750a75de11875ed1d2a> /var/containers/Bundle/Application/7A23E7B5-37B0-4C3F-853A-733C84B7727D/ObjCVoiceQuickstart.app/Frameworks/TwilioVoice.framework/TwilioVoice
0x1081d4000 - 0x1081dffff libobjc-trampolines.dylib arm64e  <a782ecde318c3379b33e7d204926c9c9> /usr/lib/libobjc-trampolines.dylib
0x1a0dbc000 - 0x1a0dd2fff libsystem_trace.dylib arm64e  <1177e8a367aa3c8cb5605bcc40419d54> /usr/lib/system/libsystem_trace.dylib
0x1a0dd3000 - 0x1a0e06fff libxpc.dylib arm64e  <e2894301267b3872a3cd0aaf659353a9> /usr/lib/system/libxpc.dylib
0x1a0e07000 - 0x1a0e07fff libsystem_blocks.dylib arm64e  <0fb3b7d281de30979e83b408b48e8b0e> /usr/lib/system/libsystem_blocks.dylib
0x1a0e08000 - 0x1a0e86fff libsystem_c.dylib arm64e  <8b9c0d18aeba3e24a95f2ec54f9fb4ef> /usr/lib/system/libsystem_c.dylib
0x1a0e87000 - 0x1a0ec3fff libdispatch.dylib arm64e  <0c7a69cdf2ee3426bfd8742c903d3d07> /usr/lib/system/libdispatch.dylib
0x1a0ec4000 - 0x1a0ee4fff libsystem_malloc.dylib arm64e  <479f1b0225ee32ce8c0afaf20cd9e0c6> /usr/lib/system/libsystem_malloc.dylib
0x1a0ee5000 - 0x1a0eebfff libsystem_platform.dylib arm64e  <b07cc9f89c9f38b0bb974a77bf6a5db4> /usr/lib/system/libsystem_platform.dylib
0x1a0eec000 - 0x1a0ef6fff libsystem_pthread.dylib arm64e  <637416f6a7a3339b96ed9ebc80d38988> /usr/lib/system/libsystem_pthread.dylib
0x1a0ef7000 - 0x1a0f27fff libobjc.A.dylib arm64e  <2c18c54e6c84310c851ff9602890d908> /usr/lib/libobjc.A.dylib
0x1a0f28000 - 0x1a0f94fff libcorecrypto.dylib arm64e  <9d52b5f81c483635ad32214f878e3e29> /usr/lib/system/libcorecrypto.dylib
0x1a0f95000 - 0x1a0fa8fff libc++abi.dylib arm64e  <b60e71f7dd75323c8831b1ca4d42e3cb> /usr/lib/libc++abi.dylib
0x1a0fa9000 - 0x1a0fd7fff libsystem_kernel.dylib arm64e  <ae36dce0999d39909eed01106f17dc90> /usr/lib/system/libsystem_kernel.dylib
0x1a0fd8000 - 0x1a100bfff libdyld.dylib arm64e  <9d12204719b736a2a89227401f9e0e6c> /usr/lib/system/libdyld.dylib
0x1a100c000 - 0x1a1014fff libsystem_darwin.dylib arm64e  <e2c1c480b2ec3bbea3fa4c70e4056c64> /usr/lib/system/libsystem_darwin.dylib
0x1a1015000 - 0x1a106ffff libc++.1.dylib arm64e  <fff3d40d85a0308eac32908bca1188d0> /usr/lib/libc++.1.dylib
0x1a1070000 - 0x1a10b1fff libsystem_info.dylib arm64e  <c2e15922d993340aaa5da454a57dfb76> /usr/lib/system/libsystem_info.dylib
0x1a10b2000 - 0x1a142ffff CoreFoundation arm64e  <dc2c95c6b95439e886a25e0af8801e87> /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation
0x1a1430000 - 0x1a1496fff SystemConfiguration arm64e  <9e1b636801ac32da9dabce33f20ce872> /System/Library/Frameworks/SystemConfiguration.framework/SystemConfiguration
0x1a1497000 - 0x1a1762fff Foundation arm64e  <7a7a96af79e43db1890442e61cae8999> /System/Library/Frameworks/Foundation.framework/Foundation
0x1a1763000 - 0x1a1795fff libCRFSuite.dylib arm64e  <15ee962961303d46964ecd419e64345a> /usr/lib/libCRFSuite.dylib
0x1a1796000 - 0x1a1919fff CoreServices arm64e  <9298be2d0bd93660bddcf43d32ea3872> /System/Library/Frameworks/CoreServices.framework/CoreServices
0x1a191a000 - 0x1a197cfff libSparse.dylib arm64e  <797932fbc17f372bbd2cb9bc2d55cac1> /System/Library/Frameworks/Accelerate.framework/Frameworks/vecLib.framework/libSparse.dylib
0x1a197d000 - 0x1a1e76fff ImageIO arm64e  <b301e385830f311ebce0e786df524e8e> /System/Library/Frameworks/ImageIO.framework/ImageIO
0x1a1e77000 - 0x1a1e79fff ConstantClasses arm64e  <96b656dd09a03e82b9c2917ab36a3fdd> /System/Library/PrivateFrameworks/ConstantClasses.framework/ConstantClasses
0x1a1e7a000 - 0x1a2012fff CoreText arm64e  <6f9c00cf003b30d4aa51df5f3d3192aa> /System/Library/Frameworks/CoreText.framework/CoreText
0x1a2013000 - 0x1a2153fff Security arm64e  <98dbc2a227aa3095a418269882fd49c0> /System/Library/Frameworks/Security.framework/Security
0x1a2154000 - 0x1a21fafff IOKit arm64e  <667b9f46ecd936bfa2d3caedcb32a283> /System/Library/Frameworks/IOKit.framework/Versions/A/IOKit
0x1a21fb000 - 0x1a2232fff libMobileGestalt.dylib arm64e  <0cd87d8d90db3de6b7dc85346b64132c> /usr/lib/libMobileGestalt.dylib
0x1a2233000 - 0x1a2291fff libprotobuf.dylib arm64e  <84356760fd593baf9331b1564b037b82> /usr/lib/libprotobuf.dylib
0x1a2292000 - 0x1a22a4fff libprotobuf-lite.dylib arm64e  <afe26eb886903b9d8b40f2eb669569f3> /usr/lib/libprotobuf-lite.dylib
0x1a22a5000 - 0x1a2505fff libicucore.A.dylib arm64e  <8081f1ff2cca3276a3c0acaf2f9943df> /usr/lib/libicucore.A.dylib
0x1a2530000 - 0x1a2577fff WirelessDiagnostics arm64e  <8fc0efe64190310a983f0c5fb6193ec2> /System/Library/PrivateFrameworks/WirelessDiagnostics.framework/WirelessDiagnostics
0x1a2578000 - 0x1a25b3fff libAWDSupport.dylib arm64e  <8ebe6715cabe301f966a732931ea6d89> /usr/lib/libAWDSupport.dylib
0x1a25b4000 - 0x1a29fcfff CoreAudio arm64e  <3f986cb2a41f3bf78245e3d097083f80> /System/Library/Frameworks/CoreAudio.framework/CoreAudio
0x1a29fd000 - 0x1a2cd5fff CoreImage arm64e  <3e5cfeadb2583798bf4b1a2423970190> /System/Library/Frameworks/CoreImage.framework/CoreImage
0x1a2cd6000 - 0x1a2dc9fff LanguageModeling arm64e  <48322aa016cd3caaae9bd581976e0cd0> /System/Library/PrivateFrameworks/LanguageModeling.framework/LanguageModeling
0x1a2dca000 - 0x1a2e10fff Lexicon arm64e  <98e8e301e91833da9d507b19399a334b> /System/Library/PrivateFrameworks/Lexicon.framework/Lexicon
0x1a2e11000 - 0x1a2f97fff libsqlite3.dylib arm64e  <1670cf23e637381abf5faebd116d31ee> /usr/lib/libsqlite3.dylib
0x1a2f98000 - 0x1a2fcafff MobileKeyBag arm64e  <a9ba69467e52322c80d1eb9510833006> /System/Library/PrivateFrameworks/MobileKeyBag.framework/MobileKeyBag
0x1a2fcb000 - 0x1a2fd4fff libsystem_notify.dylib arm64e  <c5024cb0e4843b2482250cf4d9f2c074> /usr/lib/system/libsystem_notify.dylib
0x1a2fd5000 - 0x1a31c4fff CoreDuet arm64e  <babcef413a0538e180cb77001abe9ae0> /System/Library/PrivateFrameworks/CoreDuet.framework/CoreDuet
0x1a31c5000 - 0x1a330cfff Montreal arm64e  <f946b0df71d33c548887bd95cd59b533> /System/Library/PrivateFrameworks/Montreal.framework/Montreal
0x1a330d000 - 0x1a33f2fff NLP arm64e  <48080f0657193195a19e8695b3706eb6> /System/Library/PrivateFrameworks/NLP.framework/NLP
0x1a33f3000 - 0x1a3411fff CellularPlanManager arm64e  <2df1c5e75924353aaf33dbac62fb2031> /System/Library/PrivateFrameworks/CellularPlanManager.framework/CellularPlanManager
0x1a3412000 - 0x1a344ffff AppSupport arm64e  <eed8464e61c1385abb34a937feda945f> /System/Library/PrivateFrameworks/AppSupport.framework/AppSupport
0x1a3450000 - 0x1a392afff libnetwork.dylib arm64e  <6ecb169749ec30cb980f63831f8412ad> /usr/lib/libnetwork.dylib
0x1a392b000 - 0x1a3a3bfff ManagedConfiguration arm64e  <01d6e90e5d173ab9bb56afbbad078ca7> /System/Library/PrivateFrameworks/ManagedConfiguration.framework/ManagedConfiguration
0x1a3a3c000 - 0x1a3a66fff CoreServicesStore arm64e  <24e44ad3986f340fbe32c6e3642628a6> /System/Library/PrivateFrameworks/CoreServicesStore.framework/CoreServicesStore
0x1a3a67000 - 0x1a3a88fff UserManagement arm64e  <6b21d05273aa35bf9aebbd45b36c8c87> /System/Library/PrivateFrameworks/UserManagement.framework/UserManagement
0x1a3a89000 - 0x1a3d40fff CoreML arm64e  <ef0b2716cf4c3cac951bf41bc896ae52> /System/Library/Frameworks/CoreML.framework/CoreML
0x1a3d41000 - 0x1a3d57fff ProtocolBuffer arm64e  <129d63f1fbcb30e18ec3bed0f9f21589> /System/Library/PrivateFrameworks/ProtocolBuffer.framework/ProtocolBuffer
0x1a3d58000 - 0x1a3d72fff CommonUtilities arm64e  <97dc2a6830c6367ba376049aa37a0263> /System/Library/PrivateFrameworks/CommonUtilities.framework/CommonUtilities
0x1a3d73000 - 0x1a3d73fff libenergytrace.dylib arm64e  <d04472667569321f996d7e7bb9115053> /usr/lib/libenergytrace.dylib
0x1a3d74000 - 0x1a3dacfff RunningBoardServices arm64e  <9f651b0077a73117a2eda47d407045da> /System/Library/PrivateFrameworks/RunningBoardServices.framework/RunningBoardServices
0x1a3dad000 - 0x1a3e25fff BaseBoard arm64e  <6dea964e3a97384f81b8d5a3be499760> /System/Library/PrivateFrameworks/BaseBoard.framework/BaseBoard
0x1a4376000 - 0x1a43e8fff CoreLocation arm64e  <823cfd7bdba33fe4a2c58859d96555c5> /System/Library/Frameworks/CoreLocation.framework/CoreLocation
0x1a43f6000 - 0x1a444cfff Accounts arm64e  <8760adcf0b723e0c8098e561851ca835> /System/Library/Frameworks/Accounts.framework/Accounts
0x1a445e000 - 0x1a47befff CFNetwork arm64e  <e94fb3fd49b5399497b4f12c844cbe7e> /System/Library/Frameworks/CFNetwork.framework/CFNetwork
0x1a47bf000 - 0x1a48a1fff UIFoundation arm64e  <8badfa0df51739f9ac82cecdb0a4ac66> /System/Library/PrivateFrameworks/UIFoundation.framework/UIFoundation
0x1a48a2000 - 0x1a59c6fff UIKitCore arm64e  <aafefebec17233468972810eb8f2f2c6> /System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore
0x1a59c7000 - 0x1a59d5fff AssertionServices arm64e  <92e1717258813893bdc292409ee6ec7c> /System/Library/PrivateFrameworks/AssertionServices.framework/AssertionServices
0x1a59d6000 - 0x1a5aadfff CoreTelephony arm64e  <7b0b55a59dc733fab88e0c20a1f781f1> /System/Library/Frameworks/CoreTelephony.framework/CoreTelephony
0x1a5aae000 - 0x1a5ab3fff AggregateDictionary arm64e  <3fe399052aec3a05a8b161d8a2297524> /System/Library/PrivateFrameworks/AggregateDictionary.framework/AggregateDictionary
0x1a5ab4000 - 0x1a5acafff libsystem_asl.dylib arm64e  <8720eceb36db35b1b69d89c13bd6464f> /usr/lib/system/libsystem_asl.dylib
0x1a5acb000 - 0x1a5b47fff CloudDocs arm64e  <604ea7d3f96b38e483d2d285c95f5123> /System/Library/PrivateFrameworks/CloudDocs.framework/CloudDocs
0x1a5b48000 - 0x1a5e7bfff CoreData arm64e  <35eaef65b0fe3387a6f1953ba6c6b221> /System/Library/Frameworks/CoreData.framework/CoreData
0x1a60ee000 - 0x1a6119fff BoardServices arm64e  <beb1470764c9331495f5e60681f32d92> /System/Library/PrivateFrameworks/BoardServices.framework/BoardServices
0x1a61d2000 - 0x1a61e0fff libsystem_networkextension.dylib arm64e  <07dd981a43d432e4a75f0edf005264e3> /usr/lib/system/libsystem_networkextension.dylib
0x1a61e1000 - 0x1a6201fff CoreAnalytics arm64e  <9a1858e559963c299cc192367406f027> /System/Library/PrivateFrameworks/CoreAnalytics.framework/CoreAnalytics
0x1a6202000 - 0x1a637cfff CloudKit arm64e  <3055305cd1a331e19ce67c367cfa3b6a> /System/Library/Frameworks/CloudKit.framework/CloudKit
0x1a637d000 - 0x1a63ccfff SpringBoardServices arm64e  <99531da589fd32ec8788899443a3c764> /System/Library/PrivateFrameworks/SpringBoardServices.framework/SpringBoardServices
0x1a63cd000 - 0x1a6444fff FrontBoardServices arm64e  <370f1f18e8a936b5b0eb9735a02ce2de> /System/Library/PrivateFrameworks/FrontBoardServices.framework/FrontBoardServices
0x1a6445000 - 0x1a655dfff Network arm64e  <1219db6932e9365aa50a7ff994f4fe4e> /System/Library/Frameworks/Network.framework/Network
0x1a65bb000 - 0x1a65c2fff libsystem_symptoms.dylib arm64e  <f76c087a16863e20b189be0ee42175dc> /usr/lib/system/libsystem_symptoms.dylib
0x1a65c3000 - 0x1a7519fff GeoServices arm64e  <11521e66ab173ead938efa40b6134e46> /System/Library/PrivateFrameworks/GeoServices.framework/GeoServices
0x1a751a000 - 0x1a7522fff TCC arm64e  <97e67d9c4a10360c9f412456dcbdc97e> /System/Library/PrivateFrameworks/TCC.framework/TCC
0x1a7523000 - 0x1a757efff IMFoundation arm64e  <506939c097453d359a2fe6bcbb2b06d8> /System/Library/PrivateFrameworks/IMFoundation.framework/IMFoundation
0x1a757f000 - 0x1a76e1fff CoreUtils arm64e  <3cf1c31488173637a72f8ba3bfe83a53> /System/Library/PrivateFrameworks/CoreUtils.framework/CoreUtils
0x1a77c2000 - 0x1a77cbfff libsystem_containermanager.dylib arm64e  <b96c896edc9f394c81f8dfbc1091e47b> /usr/lib/system/libsystem_containermanager.dylib
0x1a77cc000 - 0x1a784afff AppleAccount arm64e  <44c8ad8bd0e1386ca4f8f5558eb86e07> /System/Library/PrivateFrameworks/AppleAccount.framework/AppleAccount
0x1a784b000 - 0x1a7866fff ApplePushService arm64e  <328793b3825a387cbf3ebb42999ac370> /System/Library/PrivateFrameworks/ApplePushService.framework/ApplePushService
0x1a7867000 - 0x1a7957fff IDS arm64e  <335b4e0fb0c237898ea7fc998e5d5f4d> /System/Library/PrivateFrameworks/IDS.framework/IDS
0x1a7958000 - 0x1a7a88fff IDSFoundation arm64e  <0ed663fbdf353be69dac32c646232225> /System/Library/PrivateFrameworks/IDSFoundation.framework/IDSFoundation
0x1a7a89000 - 0x1a7a8afff libCTGreenTeaLogger.dylib arm64e  <8cbc0d475be530e188f1c51e7d73100d> /usr/lib/libCTGreenTeaLogger.dylib
0x1a7af0000 - 0x1a7bf1fff CoreMedia arm64e  <89ad72de99123e85b361ad7cd6d823f0> /System/Library/Frameworks/CoreMedia.framework/CoreMedia
0x1a7bf2000 - 0x1a7c02fff UIKitServices arm64e  <7ca41cb46fd03e96a3d9dfbe74305ad7> /System/Library/PrivateFrameworks/UIKitServices.framework/UIKitServices
0x1a7c03000 - 0x1a7c57fff BackBoardServices arm64e  <e485693989fe3af1b52f0a73a4f372c0> /System/Library/PrivateFrameworks/BackBoardServices.framework/BackBoardServices
0x1a7c58000 - 0x1a7eaffff QuartzCore arm64e  <4da865ca7f363d7f952e05a9e5ed505d> /System/Library/Frameworks/QuartzCore.framework/QuartzCore
0x1a7eb0000 - 0x1a806dfff ColorSync arm64e  <62b6e344294735a18231a30bc9ed11d3> /System/Library/PrivateFrameworks/ColorSync.framework/ColorSync
0x1a806e000 - 0x1a85e1fff CoreGraphics arm64e  <ec19539856b13b91b6996b20fde8cb80> /System/Library/Frameworks/CoreGraphics.framework/CoreGraphics
0x1a85e2000 - 0x1a871dfff Contacts arm64e  <48f4fe0bc42d317496b32040b12c1c9e> /System/Library/Frameworks/Contacts.framework/Contacts
0x1a871e000 - 0x1a874efff UserNotifications arm64e  <cffabd1a9c043e179af4ef72f20227e3> /System/Library/Frameworks/UserNotifications.framework/UserNotifications
0x1a874f000 - 0x1a8772fff LocationSupport arm64e  <72ccaa1df5673dd69db2fbb902140de5> /System/Library/PrivateFrameworks/LocationSupport.framework/LocationSupport
0x1a88d9000 - 0x1a8ef8fff WebKit arm64e  <d74e8e63b96338449ca08a3a0f5fae4c> /System/Library/Frameworks/WebKit.framework/WebKit
0x1a8ef9000 - 0x1aac15fff WebCore arm64e  <ca426a2f548134acaf0a08332c0a84e0> /System/Library/PrivateFrameworks/WebCore.framework/WebCore
0x1aac16000 - 0x1aac2efff libAccessibility.dylib arm64e  <02691cb3d3723935be9f2eca79233d00> /usr/lib/libAccessibility.dylib
0x1aac2f000 - 0x1aac3afff AXCoreUtilities arm64e  <d2740e1c60fe3260a9de67012c8bdea4> /System/Library/PrivateFrameworks/AXCoreUtilities.framework/AXCoreUtilities
0x1aac3b000 - 0x1aacb5fff ContactsFoundation arm64e  <7f5d4eea47773b1bbadc29d7884a2873> /System/Library/PrivateFrameworks/ContactsFoundation.framework/ContactsFoundation
0x1aacb6000 - 0x1aaccafff PowerLog arm64e  <e38c8d42d0883dad874a93d61f25ac88> /System/Library/PrivateFrameworks/PowerLog.framework/PowerLog
0x1aaccb000 - 0x1aacdcfff IOSurface arm64e  <a16823eb17723ae7b9cd5669882ff3bb> /System/Library/Frameworks/IOSurface.framework/IOSurface
0x1aacdd000 - 0x1ab3e6fff MediaToolbox arm64e  <be59c72809d7384a9f934aadd48c111a> /System/Library/Frameworks/MediaToolbox.framework/MediaToolbox
0x1ab3e7000 - 0x1ab3effff GraphicsServices arm64e  <35a16dda337d378fadb4b70c8a46bb74> /System/Library/PrivateFrameworks/GraphicsServices.framework/GraphicsServices
0x1ab4d8000 - 0x1ab6d6fff AVFoundation arm64e  <bae1d0dcb9063af29651a0f35779be54> /System/Library/Frameworks/AVFoundation.framework/AVFoundation
0x1ab710000 - 0x1ab75ffff MobileWiFi arm64e  <5a17dab6bf123c54a0cf18f0dd97acd7> /System/Library/PrivateFrameworks/MobileWiFi.framework/MobileWiFi
0x1ab760000 - 0x1ab779fff MobileAsset arm64e  <4a80dea66d10317da3eee57759fa61a5> /System/Library/PrivateFrameworks/MobileAsset.framework/MobileAsset
0x1ab77a000 - 0x1ab787fff libGSFont.dylib arm64e  <c96a3942f2ca31ab8dce9438045c53ab> /System/Library/PrivateFrameworks/FontServices.framework/libGSFont.dylib
0x1ab788000 - 0x1ab791fff FontServices arm64e  <46c4ddbaeaa4332a898aaeaa89f7e1f9> /System/Library/PrivateFrameworks/FontServices.framework/FontServices
0x1ab792000 - 0x1ab8e0fff libFontParser.dylib arm64e  <134fc516ef1e3a9d9a070562ef2edd0d> /System/Library/PrivateFrameworks/FontServices.framework/libFontParser.dylib
0x1ab930000 - 0x1aba72fff SearchFoundation arm64e  <e2dd5f62149c3d02b602b0ebd69a6acb> /System/Library/PrivateFrameworks/SearchFoundation.framework/SearchFoundation
0x1ac22b000 - 0x1ac4b8fff vImage arm64e  <aa8f48dda782376f8cfded6032f80502> /System/Library/Frameworks/Accelerate.framework/Frameworks/vImage.framework/vImage
0x1ac4b9000 - 0x1ac6e7fff AudioToolbox arm64e  <8b3c3977613a35cd9e099c8d6ad2d5c2> /System/Library/Frameworks/AudioToolbox.framework/AudioToolbox
0x1ac6e8000 - 0x1ac71dfff libAudioToolboxUtility.dylib arm64e  <7ffd108a616a3c1198848493484b633d> /usr/lib/libAudioToolboxUtility.dylib
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0x1d62c7000 - 0x1d62dffff liblzma.5.dylib arm64e  <0121b6fe5e813f688d09dd5a4068605a> /usr/lib/liblzma.5.dylib
0x1d6668000 - 0x1d6698fff libncurses.5.4.dylib arm64e  <411fcdf6338b3c0ea7d63098c56db18c> /usr/lib/libncurses.5.4.dylib
0x1d6699000 - 0x1d66adfff libnetworkextension.dylib arm64e  <2a685141e3d83a11a99863a93f534f0e> /usr/lib/libnetworkextension.dylib
0x1d6a39000 - 0x1d6a51fff libresolv.9.dylib arm64e  <81591f0ef3523d07a424e046be532237> /usr/lib/libresolv.9.dylib
0x1d6a52000 - 0x1d6a54fff libsandbox.1.dylib arm64e  <dffc0e1f146836e3a9a9174fdd212c0e> /usr/lib/libsandbox.1.dylib
0x1d6a5b000 - 0x1d6a8cfff libtidy.A.dylib arm64e  <e62eef4f17e43a4b8ee9c354a3233c0c> /usr/lib/libtidy.A.dylib
0x1d6a94000 - 0x1d6a97fff libutil.dylib arm64e  <eaa22438f5ea3da8a1aab237bb730fb8> /usr/lib/libutil.dylib
0x1d6ac5000 - 0x1d6ad6fff libz.1.dylib arm64e  <cf99bb9237a434b4b2394e3856427cd6> /usr/lib/libz.1.dylib
0x1d6f16000 - 0x1d6f1bfff libcache.dylib arm64e  <c67a14f00f763214b024b62734061cfc> /usr/lib/system/libcache.dylib
0x1d6f1c000 - 0x1d6f2cfff libcommonCrypto.dylib arm64e  <8f6a8b7d90b63bb49ef51686cf390474> /usr/lib/system/libcommonCrypto.dylib
0x1d6f2d000 - 0x1d6f30fff libcompiler_rt.dylib arm64e  <455721aa62ea32338783af085ea5b027> /usr/lib/system/libcompiler_rt.dylib
0x1d7008000 - 0x1d7008fff liblaunch.dylib arm64e  <5545bb57da133c178a4e893f67f3bbdb> /usr/lib/system/liblaunch.dylib
0x1d7009000 - 0x1d700efff libmacho.dylib arm64e  <7f0b22c0167433c2a4d9224c3c2746da> /usr/lib/system/libmacho.dylib
0x1d700f000 - 0x1d7010fff libremovefile.dylib arm64e  <78ba982e4ac339a081d6770ac532094d> /usr/lib/system/libremovefile.dylib
0x1d7011000 - 0x1d7012fff libsystem_featureflags.dylib arm64e  <3fdc940f51b03e06a4ca0a806e24a565> /usr/lib/system/libsystem_featureflags.dylib
0x1d7013000 - 0x1d7040fff libsystem_m.dylib arm64e  <e924f838a34b3a8d8c1b6d198ded17c1> /usr/lib/system/libsystem_m.dylib
0x1d7041000 - 0x1d7046fff libunwind.dylib arm64e  <19ddabc7002c33ab90c5cb020d7c4572> /usr/lib/system/libunwind.dylib
0x1d732b000 - 0x1d7397fff NanoRegistry arm64e  <161c4b8135c13f5d805fd1155e49fef1> /System/Library/PrivateFrameworks/NanoRegistry.framework/NanoRegistry
0x1d7398000 - 0x1d73a5fff NanoPreferencesSync arm64e  <ca244dbaa32e33db919b5c0af21c9248> /System/Library/PrivateFrameworks/NanoPreferencesSync.framework/NanoPreferencesSync

EOF

[bobiechen-twilio]

Hi @roman-kot

I am using the latest Obj-C quickstart and I was able to run and register the mobile client. Please add breakpoint in your environment to identify what caused the exception in your app.

[bobiechen-twilio]

Hi @roman-kot

You can update the app scheme in Xcode to start debugging when the app is launched manually (or by the incoming VoIP push).

Select "Wait for executable to be launched" and run the app

[roman-kot]

There is no exception message. Just a termination.

[bobiechen-twilio]

Hi @roman-kot

Thanks for providing the screenshots. If you continue the process step by step, at which line did the application get terminated? Also can you print out the payload.dictionaryPayload when the app receives the didReceiveIncomingPushWithPayload PushKit callback?

[roman-kot]

(lldb) po payload.dictionaryPayload
{
    aps =     {
    };
    "twi_account_sid" = ...
    "twi_bridge_token" = "...";
    "twi_call_sid" = CAe81a6cdebc64bc18ebcc8100fc0e62f5;
    "twi_from" = "client:quick_start";
    "twi_message_id" = RUc683e156231cd6fd1ecbfdc90eb04aa2;
    "twi_message_type" = "twilio.voice.call";
    "twi_to" = "client:rk";
}

Message from debugger: Terminated due to signal 9

Terminated when stepping over this line:

if (![TwilioVoice handleNotification:payload.dictionaryPayload delegate:self delegateQueue:nil]) {

[bobiechen-twilio]

Thanks for providing the payload @roman-kot. You can modify the comment and hide the credentials, especially the bridge token and the account SID.

The payload looks as a normal and should not account for the reason of the crash.

Can you help me try two things:

• Use the "Step into" button when the debugger hits the line and do a granular step-by-step walk through until you hit the termination
• Or set a breakpoint inside the callInviteReceived: method. I have a feeling that somehow something is causing the exception here.

[roman-kot]

@bchen-twilio ~I'm not able to debug it anymore. The app doesn't start from incoming push when it's killed. Even more, I don't even get the push when the app is simply in background state. Nothing's changed on my side over night, Twilio console shows Ringing and then No Answer. Everything works fine when the app is in foreground state.~ Apparently

Repeatedly failing to report calls may prevent your app from receiving any more incoming voip notifications

After I changed the build version, I am getting the pushes again. Unfortunately it doesn't even reach - (void)callInviteReceived:(TVOCallInvite *)callInvite {

[bobiechen-twilio]

Hi @roman-kot

Thanks for the update.

From your description I believe the notification delivery is working well but somehow the exception is still happening when the app is not in the active state (aka. in the foreground).

Unfortunately without knowing the exact reason of the exception/crash we are not able to help fixing the problem. Can you use the Console application from macOS and save the device log when you debug the crash issue? I have a feeling that more useful information will be available in the log.

[anas-p]

1. PKRegistryDelegate needs to be registered during the launch or quickly as possible else you never get the Push.
2. Call provider.reportNewIncomingCall inside didReceiveIncomingPushWith
3. Use completion() in main thread.

These steps solved my problem.

[bobiechen-twilio]

Based on the conversations this seems to be related to how application lifecycle is handled with the React Native plug-in. I have labeled the ticket and am keeping this ticket open in case other developers are running into similar issue.

[fmonsalvo]

Hi @anas-p do you have a repo with a working example of what is working for you? Thanks.

[PCGurjar]

HI,

I am getting the exact same issue in my iOS swift project.

[bobiechen-twilio]

Hi @PCGurjar

Just want to confirm:

• Are you using the React Native plugin?
• Are you able to receive push notifications when the app is active?
• Did you see any error being logged in your Twilio dev console? could you provide Call SIDs if you see any?
• Have you tried using the Mac OS Console application and check the device log?
• Is the PkPushRegistry object created at app launch? Our quickstart demonstrates how to do this based Apple's guideline. Apps fail to do so will face this issue.