We are working on developing an keyboard extension for iOS. And we are receiving crash reports. But reports are not related to code that we wrote but, they happen somewhere before or during the launching of the keyboard extension by the system. Here is the thread that crashed: Thread 4 name: Dispatch queue: com.apple.extension.global-state-queue Thread 4 Crashed: 0 libsystem_kernel.dylib 0x1fa4cd01c __pthread_kill + 8 1 libsystem_pthread.dylib 0x21cad6680 pthread_kill + 268 2 libsystem_c.dylib 0x1bb8d3bb0 abort + 180 3 libc++abi.dylib 0x21ca04660 abort_message + 132 4 libc++abi.dylib 0x21c9f462c demangling_terminate_handler() + 348 5 libobjc.A.dylib 0x1abd0ed34 _objc_terminate() + 144 6 libc++abi.dylib 0x21ca03a24 std::__terminate(void (*)()) + 16 7 libc++abi.dylib 0x21ca039c8 std::terminate() + 56 8 libdispatch.dylib 0x1bb81b314 _dispatch_client_callout + 40 9 libdispatch.dylib 0x1bb822894 _dispatch_lane_serial_drain + 748 10 libdispatch.dylib 0x1bb8233c4 _dispatch_lane_invoke + 380 11 libdispatch.dylib 0x1bb82e004 _dispatch_root_queue_drain_deferred_wlh + 288 12 libdispatch.dylib 0x1bb82d878 _dispatch_workloop_worker_thread + 404 13 libsystem_pthread.dylib 0x21cad2964 _pthread_wqthread + 288 14 libsystem_pthread.dylib 0x21cad2a04 start_wqthread + 8 Can someone help us to deduce what can cause this crashes from the crash log? Here is full report: Crash report Thank you