* thread #258, queue = 'com.apple.coremedia.vqr.timebasesync', stop reason = EXC_BREAKPOINT (code=1, subcode=0x114d55c50)
* frame #0: 0x0000000114d55c50 libdispatch.dylib`__DISPATCH_WAIT_FOR_QUEUE__ + 456
frame #1: 0x0000000114d55610 libdispatch.dylib`_dispatch_sync_f_slow + 176
frame #2: 0x00000001aaa1b820 MediaToolbox`videoQueueRemote_Invalidate + 320
frame #3: 0x00000001aaa1b8e8 MediaToolbox`videoQueueRemote_Finalize + 32
frame #4: 0x00000001a75f1b80 CoreMedia`FigBaseObjectFinalize + 92
frame #5: 0x00000001a0eaf000 CoreFoundation`_CFRelease + 208
frame #6: 0x00000001aaa1c4cc MediaToolbox`videoQueueRemote_syncServerTimebaseToMoment + 396
frame #7: 0x00000001aa683e74 MediaToolbox`figSyncMomentSource_sendMomentInternal + 68
frame #8: 0x0000000114d46c04 libdispatch.dylib`_dispatch_client_callout + 16
frame #9: 0x0000000114d4db74 libdispatch.dylib`_dispatch_lane_serial_drain + 744
frame #10: 0x0000000114d4e710 libdispatch.dylib`_dispatch_lane_invoke + 448
frame #11: 0x0000000114d59ae4 libdispatch.dylib`_dispatch_workloop_worker_thread + 1324
frame #12: 0x00000001a0c4cfa4 libsystem_pthread.dylib`_pthread_wqthread + 276
this happened after [AVSampleBufferDisplayLayer dealloc]. Did anyone ever suffer from this?