App crashes on iPhone but not iPad and not in Unity. No warnings. No clue where to start.

unity_BUIockkbCwDQ9w · February 6, 2020, 11:51pm

I am new to Unity, not new to coding. I am getting an extremely strange crash, only when running on iPhone (X). The crash does not occur in Unity, and it does not occur on my iPad (6th gen) (most bizarre). Several changes were made to code, so this is hard to pinpoint, but here is the stack trace.

All thoughts appreciated, as general as they might be. What is the workflow to debug something like this?

(lldb) bt all

UnityFramework was compiled with optimization - stepping may behave oddly; variables may not be available.

thread #1, queue = ‘com.apple.main-thread’, stop reason = signal SIGABRT

frame #0: 0x00000001b4649ec4 libsystem_kernel.dylib`__pthread_kill + 8

frame #1: 0x00000001b4569724 libsystem_pthread.dylib`pthread_kill$VARIANT$armv81 + 216

frame #2: 0x00000001b44b9844 libsystem_c.dylib`abort + 100

frame #3: 0x00000001032f8c98 UnityFramework`uncaught_exception_handler + 32

frame #4: 0x000000010281e394 UnityFramework`UncaughtExceptionHandler(exception=) at CrashReporter.mm:89:9 [opt]

frame #5: 0x00000001b4852d50 CoreFoundation`__handleUncaughtException + 636

frame #6: 0x00000001b457a24c libobjc.A.dylib`_objc_terminate() + 112

frame #7: 0x00000001b461f304 libc++abi.dylib`std::__terminate(void (*)()) + 16

frame #8: 0x00000001b461f29c libc++abi.dylib`std::terminate() + 44

frame #9: 0x00000001b457a1dc libobjc.A.dylib`objc_terminate + 12

frame #10: 0x00000001b451f198 libdispatch.dylib`_dispatch_client_callout + 36

frame #11: 0x00000001b450234c libdispatch.dylib`_dispatch_main_queue_callback_4CF$VARIANT$armv81 + 996

frame #12: 0x00000001b47d05e4 CoreFoundation`CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE + 12

frame #13: 0x00000001b47cb5d8 CoreFoundation`__CFRunLoopRun + 2004

frame #14: 0x00000001b47caadc CoreFoundation`CFRunLoopRunSpecific + 464

frame #15: 0x00000001be750328 GraphicsServices`GSEventRunModal + 104

frame #16: 0x00000001b88c5ae0 UIKitCore`UIApplicationMain + 1936

frame #17: 0x0000000102818940 UnityFramework`::-[UnityFramework runUIApplicationMainWithArgc:argv:](self=, _cmd=, argc=1, argv=0x000000016f07b978) at main.mm:96:5 [opt]

frame #18: 0x0000000100d8be1c pongclash`main(argc=, argv=) at main.mm:26:9 [opt]

frame #19: 0x00000001b4654360 libdyld.dylib`start + 4

thread #3

frame #0: 0x00000001b464aa7c libsystem_kernel.dylib`__workq_kernreturn + 8

thread #4

frame #0: 0x00000001b4571758 libsystem_pthread.dylib`start_wqthread

thread #5

frame #0: 0x00000001b464aa7c libsystem_kernel.dylib`__workq_kernreturn + 8

thread #6, name = ‘com.apple.uikit.eventfetch-thread’

frame #0: 0x00000001b4628634 libsystem_kernel.dylib`mach_msg_trap + 8

frame #1: 0x00000001b4627aa0 libsystem_kernel.dylib`mach_msg + 72

frame #2: 0x00000001b47d0288 CoreFoundation`__CFRunLoopServiceMachPort + 216

frame #3: 0x00000001b47cb3a8 CoreFoundation`__CFRunLoopRun + 1444

frame #4: 0x00000001b47caadc CoreFoundation`CFRunLoopRunSpecific + 464

frame #5: 0x00000001b4b0a7f4 Foundation`-[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 228

frame #6: 0x00000001b4b0a6d4 Foundation`-[NSRunLoop(NSRunLoop) runUntilDate:] + 88

frame #7: 0x00000001b895e204 UIKitCore`-[UIEventFetcher threadMain] + 152

frame #8: 0x00000001b4c3b0a4 Foundation`NSThread__start + 848

frame #9: 0x00000001b456dd8c libsystem_pthread.dylib`_pthread_start + 156

thread #7, name = ‘GC Finalizer’

frame #0: 0x00000001b4649c94 libsystem_kernel.dylib`__psynch_cvwait + 8

frame #1: 0x00000001b456b094 libsystem_pthread.dylib`_pthread_cond_wait$VARIANT$armv81 + 672

frame #2: 0x0000000103341874 UnityFramework`il2cpp::os::posix::PosixWaitObject::Wait(this=0x0000000101403a30, timeoutMS=4294967295, interruptible=false) at PosixWaitObject.cpp:119:38 [opt]

frame #3: 0x0000000103321c78 UnityFramework`il2cpp::gc::FinalizerThread(arg=) at GarbageCollector.cpp:97:34 [opt]

frame #4: 0x000000010333c2c4 UnityFramework`il2cpp::os::RunWrapper(arg=0x000000010142d2a0) at Thread.cpp:175:9 [opt]

frame #5: 0x000000010333ddfc UnityFramework`il2cpp::os::ThreadImpl::ThreadStartWrapper(arg=0x000000010143edd0) at ThreadImpl.cpp:105:9 [opt]

frame #6: 0x00000001b456dd8c libsystem_pthread.dylib`_pthread_start + 156

thread #8, name = ‘Job.Worker 0’

frame #0: 0x00000001b4628670 libsystem_kernel.dylib`semaphore_wait_trap + 8

frame #1: 0x00000001b44f0e88 libdispatch.dylib`_dispatch_sema4_wait$VARIANT$armv81 + 24

frame #2: 0x00000001b44f14c4 libdispatch.dylib`_dispatch_semaphore_wait_slow + 128

frame #3: 0x0000000102fc9d5c UnityFramework`UnityClassic::Baselib_SystemSemaphore_Acquire(UnityClassic::Baselib_SystemSemaphore_Handle) [inlined] DarwinApi::detail::Acquire(timeout=18446744073709551615) at Baselib_SystemSemaphore_DarwinApi.inl.h:35:24 [opt]

frame #4: 0x0000000102fc9d50 UnityFramework`UnityClassic::Baselib_SystemSemaphore_Acquire(UnityClassic::Baselib_SystemSemaphore_Handle) [inlined] DarwinApi::Baselib_SystemSemaphore_Acquire(UnityClassic::Baselib_SystemSemaphore_Handle) at Baselib_SystemSemaphore_DarwinApi.inl.h:54 [opt]

frame #5: 0x0000000102fc9d50 UnityFramework`UnityClassic::Baselib_SystemSemaphore_Acquire(semaphore=) at Baselib_SystemSemaphore_CProxy.inl.h:14 [opt]

frame #6: 0x0000000102c1fcbc UnityFramework`::WaitForSignalInternal() [inlined] Baselib_Semaphore_Acquire at Baselib_Semaphore_SemaphoreBased.inl.h:39:5 [opt]

frame #7: 0x0000000102c1fcb4 UnityFramework`::WaitForSignalInternal() [inlined] WaitForSignalNoProfile at Semaphore.h:33 [opt]

frame #8: 0x0000000102c1fcb4 UnityFramework`::WaitForSignalInternal() at CappedSemaphore.h:91 [opt]

frame #9: 0x0000000102c62368 UnityFramework`::ProcessJobs() [inlined] WaitForSignalNoProfile at CappedSemaphore.h:63:9 [opt]

frame #10: 0x0000000102c6235c UnityFramework`::ProcessJobs() [inlined] WaitForSignal at WorkerController.h:19 [opt]

frame #11: 0x0000000102c6235c UnityFramework`::ProcessJobs() at JobQueue.cpp:973 [opt]

frame #12: 0x0000000102c61900 UnityFramework`::WorkLoop() at JobQueue.cpp:1028:8 [opt]

frame #13: 0x0000000102cfb6ac UnityFramework`::RunThreadWrapper() at Thread.cpp:78:14 [opt]

frame #14: 0x00000001b456dd8c libsystem_pthread.dylib`_pthread_start + 156

thread #9, name = ‘Job.Worker 1’