swift - App from TestFlight crashes in background

Question

I have a situation that is driving me crazy. I have an app that runs fine on both simulator and device. Only on the device, and only on certain moments ( apparently unrelated ) when he app is put in the background ( say when you want to open another app) it crashes.

It TestFlight only the feedback json is available to download, and no crashlog is generated.

I went on the device to see if there is any crash log generated from the app but none generated. The only log that is generated is splashboardd witch gives the following output:

Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note:  EXC_CORPSE_NOTIFY
Triggered by Thread:  1

Application Specific Information:
abort() called

Last Exception Backtrace:
0   CoreFoundation                  0x19c3e186c __exceptionPreprocess + 220
1   libobjc.A.dylib                 0x1b1350c50 objc_exception_throw + 59
2   CoreFoundation                  0x19c2e7000 +[NSException raise:format:arguments:] + 99
3   Foundation                      0x19d67b91c -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 131
4   splashboardd                    0x100a7b068 0x100a74000 + 28776
5   splashboardd                    0x100a7a748 0x100a74000 + 26440
6   BaseBoard                       0x1a0997568 __40-[BSBaseXPCServer _addClientConnection:]_block_invoke + 99
7   libxpc.dylib                    0x1e7bda0e4 _xpc_connection_call_event_handler + 163
8   libxpc.dylib                    0x1e7bda4a0 _xpc_connection_mach_event + 923
9   libdispatch.dylib               0x19bfd5e7c _dispatch_client_callout4 + 19
10  libdispatch.dylib               0x19bfefd2c _dispatch_mach_msg_invoke + 471
11  libdispatch.dylib               0x19bfdcfd8 _dispatch_lane_serial_drain + 271
12  libdispatch.dylib               0x19bff0a3c _dispatch_mach_invoke + 467
13  libdispatch.dylib               0x19bfdcfd8 _dispatch_lane_serial_drain + 271
14  libdispatch.dylib               0x19bfddc90 _dispatch_lane_invoke + 459
15  libdispatch.dylib               0x19bfe7d78 _dispatch_workloop_worker_thread + 707
16  libsystem_pthread.dylib         0x1e7bb3804 _pthread_wqthread + 275
17  libsystem_pthread.dylib         0x1e7bba75c start_wqthread + 7


Thread 0 name:  Dispatch queue: com.apple.main-thread
Thread 0:
0   libsystem_kernel.dylib          0x00000001ca1342d0 mach_msg_trap + 8
1   libsystem_kernel.dylib          0x00000001ca133660 mach_msg + 76
2   CoreFoundation                  0x000000019c35cc30 __CFRunLoopServiceMachPort + 380
3   CoreFoundation                  0x000000019c356c14 __CFRunLoopRun + 1216
4   CoreFoundation                  0x000000019c35621c CFRunLoopRunSpecific + 600
5   Foundation                      0x000000019d605df0 -[NSRunLoop+ 36336 (NSRunLoop) runMode:beforeDate:] + 232
6   Foundation                      0x000000019d6396bc -[NSRunLoop+ 247484 (NSRunLoop) run] + 92
7   splashboardd                    0x0000000100a7a558 0x100a74000 + 25944
8   libdyld.dylib                   0x000000019c0166b0 start + 4

Thread 1 name:  Dispatch queue: com.apple.splashboard.launchimage.serverTaskQueue
Thread 1 Crashed:
0   libsystem_kernel.dylib          0x00000001ca158414 __pthread_kill + 8
1   libsystem_pthread.dylib         0x00000001e7bb2b40 pthread_kill + 272
2   libsystem_c.dylib               0x00000001a577eb74 abort + 104
3   libc++abi.dylib                 0x00000001b1456cf8 __cxxabiv1::__aligned_malloc_with_fallback+ 81144 (unsigned long) + 0
4   libc++abi.dylib                 0x00000001b1447e4c demangling_unexpected_handler+ 20044 () + 0
5   libobjc.A.dylib                 0x00000001b1350f64 _objc_terminate+ 28516 () + 144
6   libc++abi.dylib                 0x00000001b14560e0 std::__terminate(void (*)+ 78048 ()) + 20
7   libc++abi.dylib                 0x00000001b145606c std::terminate+ 77932 () + 44
8   libdispatch.dylib               0x000000019bfd5e90 _dispatch_client_callout4 + 40
9   libdispatch.dylib               0x000000019bfefd2c _dispatch_mach_msg_invoke + 472
10  libdispatch.dylib               0x000000019bfdcfd8 _dispatch_lane_serial_drain + 272
11  libdispatch.dylib               0x000000019bff0a3c _dispatch_mach_invoke + 468
12  libdispatch.dylib               0x000000019bfdcfd8 _dispatch_lane_serial_drain + 272
13  libdispatch.dylib               0x000000019bfddc90 _dispatch_lane_invoke + 460
14  libdispatch.dylib               0x000000019bfe7d78 _dispatch_workloop_worker_thread + 708
15  libsystem_pthread.dylib         0x00000001e7bb3804 _pthread_wqthread + 276
16  libsystem_pthread.dylib         0x00000001e7bba75c start_wqthread + 8

Thread 1 crashed with ARM Thread State (64-bit):
    x0: 0x0000000000000000   x1: 0x0000000000000000   x2: 0x0000000000000000   x3: 0x0000000000000000
    x4: 0x000000016f4115c0   x5: 0x000000016f411b70   x6: 0x000000000000006e   x7: 0x0000000000001400
    x8: 0x00000000000005b9   x9: 0x868d4dbec9338e54  x10: 0x0000000000000002  x11: 0x0000000000000003
   x12: 0x0000000000000000  x13: 0x0000010000000000  x14: 0x0000000000000010  x15: 0x0000000000000000
   x16: 0x0000000000000148  x17: 0x000000016f413000  x18: 0x0000000000000000  x19: 0x0000000000000006
   x20: 0x000000000000293b  x21: 0x000000016f4130e0  x22: 0x0000000000000000  x23: 0x0000000001010000
   x24: 0x0000000101833038  x25: 0x000000016f4130e0  x26: 0x000000016f412120  x27: 0xafce000100e282c8
   x28: 0x0000000100e052d0   fp: 0x000000016f411ad0   lr: 0x00000001e7bb2b40
    sp: 0x000000016f411ab0   pc: 0x00000001ca158414 cpsr: 0x40000000
   esr: 0x56000080  Address size fault

Any point in the right direction will be greatly appreciated.

Answer 1

等待大神解答