几周前我们发布了我们的应用程序。它是一个非常大的应用程序，因此我无法发布整个代码。
但是，我们在Fabric.io中收到错误，而我们并不知道来源。有没有人见过像这样的错误？
#9. Crashed: com.twitter.crashlytics.ios.exception
0 Aktionis.ch 0xbf37b CLSProcessRecordAllThreads (CLSProcess.c:376)
1 Aktionis.ch 0xbf37b CLSProcessRecordAllThreads (CLSProcess.c:376)
2 Aktionis.ch 0xbf595 CLSProcessRecordAllThreads (CLSProcess.c:403)
3 Aktionis.ch 0xb3d5d CLSHandler (CLSHandler.m:26)
4 Aktionis.ch 0xbe0d7 __CLSExceptionRecord_block_invoke (CLSException.mm:199)
5 libdispatch.dylib 0x39eaa81f _dispatch_client_callout + 22
6 libdispatch.dylib 0x39ebcdd7 _dispatch_barrier_sync_f_invoke + 26
7 Aktionis.ch 0xbdadf CLSExceptionRecord (CLSException.mm:206)
8 Aktionis.ch 0xbd90d CLSExceptionRecordNSException (CLSException.mm:101)
9 Aktionis.ch 0xbd47b CLSTerminateHandler() (CLSException.mm:253)
10 libc++abi.dylib 0x3927b1c7 std::__terminate(void (*)()) + 78
11 libc++abi.dylib 0x3927aa1d __cxxabiv1::exception_cleanup_func(_Unwind_Reason_Code, _Unwind_Exception*) + 114
12 libobjc.A.dylib 0x399c2da3 objc_exception_throw + 250
13 Aktionis.ch 0x275159 -[RCTBatchedBridge _handleRequestNumber:moduleID:methodID:params:] (RCTBatchedBridge.m:1003)
14 Aktionis.ch 0x274a9f __33-[RCTBatchedBridge handleBuffer:]_block_invoke.329 (RCTBatchedBridge.m:916)
15 libdispatch.dylib 0x39eaa833 _dispatch_call_block_and_release + 10
16 libdispatch.dylib 0x39eaaded _dispatch_queue_drain$VARIANT$up + 444
17 libdispatch.dylib 0x39eab297 _dispatch_queue_invoke$VARIANT$up + 38
18 libdispatch.dylib 0x39ebd88d _dispatch_root_queue_drain + 76
19 libdispatch.dylib 0x39ebdb21 _dispatch_worker_thread2 + 56
20 libsystem_pthread.dylib 0x39fecbd3 _pthread_wqthread + 298
21 libsystem_pthread.dylib 0x39feca98 start_wqthread + 8
--
Fatal Exception: RCTFatalException: Unhandled JS Exception: 'null' is not an object (evaluating 'n._currentElement')
0 CoreFoundation 0x2f211f83 __exceptionPreprocess
1 libobjc.A.dylib 0x399c2ccf objc_exception_throw
2 CoreFoundation 0x2f211ec5 -[NSException initWithCoder:]
3 Aktionis.ch 0x255e39 RCTFatal (RCTAssert.m:137)
4 Aktionis.ch 0x2516d5 -[RCTExceptionsManager reportFatalException:stack:exceptionId:] (RCTExceptionsManager.m:64)
5 CoreFoundation 0x2f215534 __invoking___
6 CoreFoundation 0x2f16008b -[NSInvocation invoke]
7 CoreFoundation 0x2f163823 -[NSInvocation invokeWithTarget:]
8 Aktionis.ch 0x2544a3 -[RCTModuleMethod invokeWithBridge:module:arguments:] (RCTModuleMethod.m:500)
9 Aktionis.ch 0x274fd1 -[RCTBatchedBridge _handleRequestNumber:moduleID:methodID:params:] (RCTBatchedBridge.m:988)
10 Aktionis.ch 0x274a9f __33-[RCTBatchedBridge handleBuffer:]_block_invoke.329 (RCTBatchedBridge.m:916)
11 libdispatch.dylib 0x39eaa833 _dispatch_call_block_and_release
12 libdispatch.dylib 0x39eaaded _dispatch_queue_drain$VARIANT$up
13 libdispatch.dylib 0x39eab297 _dispatch_queue_invoke$VARIANT$up
14 libdispatch.dylib 0x39ebd88d _dispatch_root_queue_drain
15 libdispatch.dylib 0x39ebdb21 _dispatch_worker_thread2
16 libsystem_pthread.dylib 0x39fecbd3 _pthread_wqthread
17 libsystem_pthread.dylib 0x39feca98 start_wqthread
#0. com.apple.main-thread
0 libsystem_kernel.dylib 0x39f72a58 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x39f72859 mach_msg + 48
2 CoreFoundation 0x2f1dc84b __CFRunLoopServiceMachPort + 154
3 CoreFoundation 0x2f1dafb7 __CFRunLoopRun + 854
4 CoreFoundation 0x2f145ebf CFRunLoopRunSpecific + 522
5 CoreFoundation 0x2f145ca3 CFRunLoopRunInMode + 106
6 GraphicsServices 0x3404b663 GSEventRunModal + 138
7 UIKit 0x31a9214d UIApplicationMain + 1136
8 Aktionis.ch 0x1ca9d main (main.m:16)
9 libdyld.dylib 0x39ecfab7 start + 2
#1. com.apple.libdispatch-manager
0 libsystem_kernel.dylib 0x39f72808 kevent64 + 24
1 libdispatch.dylib 0x39ebeded _dispatch_mgr_invoke + 232
2 libdispatch.dylib 0x39eadf73 _dispatch_mgr_thread$VARIANT$up + 38
#2. WebThread
0 libsystem_kernel.dylib 0x39f72a58 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x39f72859 mach_msg + 48
2 CoreFoundation 0x2f1dc84b __CFRunLoopServiceMachPort + 154
3 CoreFoundation 0x2f1daf71 __CFRunLoopRun + 784
4 CoreFoundation 0x2f145ebf CFRunLoopRunSpecific + 522
5 CoreFoundation 0x2f145ca3 CFRunLoopRunInMode + 106
6 WebCore 0x373dd1ab RunWebThread(void*) + 418
7 libsystem_pthread.dylib 0x39fee919 _pthread_body + 140
8 libsystem_pthread.dylib 0x39fee88b _pthread_start + 102
9 libsystem_pthread.dylib 0x39fecaa4 thread_start + 8
#3. com.apple.root.default-priority
0 libsystem_platform.dylib 0x39fe6d62 _platform_memmove$VARIANT$CortexA8 + 777
1 ImageIO 0x2ff5e16f copyImageBlockSetPNG + 2426
2 ImageIO 0x2ff5d27f ImageProviderCopyImageBlockSetCallback + 542
3 CoreGraphics 0x2f29932d CGImageProviderCopyImageBlockSetWithOptions + 136
4 CoreGraphics 0x2f2bbf23 CGImageProviderCopyImageBlockSet + 26
5 CoreGraphics 0x2f298ffb img_blocks_create + 406
6 CoreGraphics 0x2f2bbef3 img_blocks_extent + 62
7 CoreGraphics 0x2f2bbead img_interpolate_extent + 108
8 CoreGraphics 0x2f28d041 img_data_lock + 4408
9 CoreGraphics 0x2f28b705 CGSImageDataLock + 88
10 libRIP.A.dylib 0x2f5d7e67 ripc_AcquireImage
11 libRIP.A.dylib 0x2f5d720d ripc_DrawImage
12 CoreGraphics 0x2f28b61b CGContextDelegateDrawImage + 50
13 CoreGraphics 0x2f28b4b1 CGContextDrawImage + 284
14 ImageIO 0x2ff7e2f5 CGImageCreateCopyWithParametersNew + 1736
15 ImageIO 0x2ff7dad5 CGImageSourceCreateThumbnailAtIndex + 2380
16 Aktionis.ch 0x2a934b RCTDecodeImageWithData (RCTImageUtils.m:260)
17 Aktionis.ch 0x2a54f3 __80-[RCTImageLoader decodeImageData:size:scale:clipped:resizeMode:completionBlock:]_block_invoke_4 (RCTImageLoader.m:587)
18 libdispatch.dylib 0x39eaa833 _dispatch_call_block_and_release + 10
19 libdispatch.dylib 0x39ebd921 _dispatch_root_queue_drain + 224
20 libdispatch.dylib 0x39ebdb21 _dispatch_worker_thread2 + 56
21 libsystem_pthread.dylib 0x39fecbd3 _pthread_wqthread + 298
22 libsystem_pthread.dylib 0x39feca98 start_wqthread + 8
#4. JavaScriptCore::BlockFree
0 libsystem_kernel.dylib 0x39f84f2c __psynch_cvwait + 24
1 libsystem_pthread.dylib 0x39fedf27 _pthread_cond_wait + 522
2 libsystem_pthread.dylib 0x39feed65 pthread_cond_wait + 40
3 JavaScriptCore 0x30173c91 JSC::BlockAllocator::blockFreeingThreadMain() + 208
4 JavaScriptCore 0x301712e3 WTF::wtfThreadEntryPoint(void*) + 14
5 libsystem_pthread.dylib 0x39fee919 _pthread_body + 140
6 libsystem_pthread.dylib 0x39fee88b _pthread_start + 102
7 libsystem_pthread.dylib 0x39fecaa4 thread_start + 8
#5. com.facebook.react.JavaScript
0 libsystem_kernel.dylib 0x39f72a58 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x39f72859 mach_msg + 48
2 CoreFoundation 0x2f1dc84b __CFRunLoopServiceMachPort + 154
3 CoreFoundation 0x2f1daf71 __CFRunLoopRun + 784
4 CoreFoundation 0x2f145ebf CFRunLoopRunSpecific + 522
5 CoreFoundation 0x2f145ca3 CFRunLoopRunInMode + 106
6 Aktionis.ch 0x26c6f1 +[RCTJSCExecutor runRunLoopThread] (RCTJSCExecutor.mm:259)
7 Foundation 0x2fbfba5f __NSThread__main__ + 1062
8 libsystem_pthread.dylib 0x39fee919 _pthread_body + 140
9 libsystem_pthread.dylib 0x39fee88b _pthread_start + 102
10 libsystem_pthread.dylib 0x39fecaa4 thread_start + 8
#6. JavaScriptCore::BlockFree
0 libsystem_kernel.dylib 0x39f84f2c __psynch_cvwait + 24
1 libsystem_pthread.dylib 0x39fedf27 _pthread_cond_wait + 522
2 libsystem_pthread.dylib 0x39feeda5 pthread_cond_timedwait + 44
3 JavaScriptCore 0x30173ded WTF::ThreadCondition::timedWait(WTF::Mutex&, double) + 108
4 JavaScriptCore 0x30173c1d JSC::BlockAllocator::blockFreeingThreadMain() + 92
5 JavaScriptCore 0x301712e3 WTF::wtfThreadEntryPoint(void*) + 14
6 libsystem_pthread.dylib 0x39fee919 _pthread_body + 140
7 libsystem_pthread.dylib 0x39fee88b _pthread_start + 102
8 libsystem_pthread.dylib 0x39fecaa4 thread_start + 8
#7. com.twitter.crashlytics.ios.MachExceptionServer
0 libsystem_kernel.dylib 0x39f72a58 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x39f72859 mach_msg + 48
2 Aktionis.ch 0xaf7d3 CLSMachExceptionServer (CLSMachException.c:179)
3 libsystem_pthread.dylib 0x39fee919 _pthread_body + 140
4 libsystem_pthread.dylib 0x39fee88b _pthread_start + 102
5 libsystem_pthread.dylib 0x39fecaa4 thread_start + 8
#8. com.apple.NSURLConnectionLoader
0 libsystem_kernel.dylib 0x39f72a58 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x39f72859 mach_msg + 48
2 CoreFoundation 0x2f1dc84b __CFRunLoopServiceMachPort + 154
3 CoreFoundation 0x2f1daf71 __CFRunLoopRun + 784
4 CoreFoundation 0x2f145ebf CFRunLoopRunSpecific + 522
5 CoreFoundation 0x2f145ca3 CFRunLoopRunInMode + 106
6 Foundation 0x2fb86087 +[NSURLConnection(Loader) _resourceLoadLoop:] + 318
7 Foundation 0x2fbfba5f __NSThread__main__ + 1062
8 libsystem_pthread.dylib 0x39fee919 _pthread_body + 140
9 libsystem_pthread.dylib 0x39fee88b _pthread_start + 102
10 libsystem_pthread.dylib 0x39fecaa4 thread_start + 8
#9. Crashed: com.twitter.crashlytics.ios.exception
0 Aktionis.ch 0xbf37b CLSProcessRecordAllThreads (CLSProcess.c:376)
1 Aktionis.ch 0xbf37b CLSProcessRecordAllThreads (CLSProcess.c:376)
2 Aktionis.ch 0xbf595 CLSProcessRecordAllThreads (CLSProcess.c:403)
3 Aktionis.ch 0xb3d5d CLSHandler (CLSHandler.m:26)
4 Aktionis.ch 0xbe0d7 __CLSExceptionRecord_block_invoke (CLSException.mm:199)
5 libdispatch.dylib 0x39eaa81f _dispatch_client_callout + 22
6 libdispatch.dylib 0x39ebcdd7 _dispatch_barrier_sync_f_invoke + 26
7 Aktionis.ch 0xbdadf CLSExceptionRecord (CLSException.mm:206)
8 Aktionis.ch 0xbd90d CLSExceptionRecordNSException (CLSException.mm:101)
9 Aktionis.ch 0xbd47b CLSTerminateHandler() (CLSException.mm:253)
10 libc++abi.dylib 0x3927b1c7 std::__terminate(void (*)()) + 78
11 libc++abi.dylib 0x3927aa1d __cxxabiv1::exception_cleanup_func(_Unwind_Reason_Code, _Unwind_Exception*) + 114
12 libobjc.A.dylib 0x399c2da3 objc_exception_throw + 250
13 Aktionis.ch 0x275159 -[RCTBatchedBridge _handleRequestNumber:moduleID:methodID:params:] (RCTBatchedBridge.m:1003)
14 Aktionis.ch 0x274a9f __33-[RCTBatchedBridge handleBuffer:]_block_invoke.329 (RCTBatchedBridge.m:916)
15 libdispatch.dylib 0x39eaa833 _dispatch_call_block_and_release + 10
16 libdispatch.dylib 0x39eaaded _dispatch_queue_drain$VARIANT$up + 444
17 libdispatch.dylib 0x39eab297 _dispatch_queue_invoke$VARIANT$up + 38
18 libdispatch.dylib 0x39ebd88d _dispatch_root_queue_drain + 76
19 libdispatch.dylib 0x39ebdb21 _dispatch_worker_thread2 + 56
20 libsystem_pthread.dylib 0x39fecbd3 _pthread_wqthread + 298
21 libsystem_pthread.dylib 0x39feca98 start_wqthread + 8
#10. Thread
0 libsystem_kernel.dylib 0x39f72a58 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x39f72859 mach_msg + 48
2 CoreFoundation 0x2f1dc84b __CFRunLoopServiceMachPort + 154
3 CoreFoundation 0x2f1daf71 __CFRunLoopRun + 784
4 CoreFoundation 0x2f145ebf CFRunLoopRunSpecific + 522
5 CoreFoundation 0x2f145ca3 CFRunLoopRunInMode + 106
6 libAVFAudio.dylib 0x2e1a5451 GenericRunLoopThread::Entry(void*) + 128
7 libAVFAudio.dylib 0x2e1997bf CAPThread::Entry(CAPThread*) + 178
8 libsystem_pthread.dylib 0x39fee919 _pthread_body + 140
9 libsystem_pthread.dylib 0x39fee88b _pthread_start + 102
10 libsystem_pthread.dylib 0x39fecaa4 thread_start + 8
#11. com.apple.CFSocket.private
0 libsystem_kernel.dylib 0x39f85434 __select + 20
1 CoreFoundation 0x2f1e070d __CFSocketManager + 484
2 libsystem_pthread.dylib 0x39fee919 _pthread_body + 140
3 libsystem_pthread.dylib 0x39fee88b _pthread_start + 102
4 libsystem_pthread.dylib 0x39fecaa4 thread_start + 8
#12. Thread
0 libsystem_kernel.dylib 0x39f74630 fsync + 8
1 libsqlite3.dylib 0x39ca4491 (null) + 29932
2 libsqlite3.dylib 0x39ca9e6d (null) + 1600
3 libsqlite3.dylib 0x39ca42a7 (null) + 29442
4 libsqlite3.dylib 0x39c99d69 (null) + 9692
5 libsqlite3.dylib 0x39c7b16d (null) + 2048
6 libsqlite3.dylib 0x39c967fb (null) + 40674
7 libsqlite3.dylib 0x39c8cab1 sqlite3_step + 408
8 Aktionis.ch 0x4ff77 -[GAIAnalyticsPropertiesStore upsertPropertyRecord:] (GAIAnalyticsPropertiesStore.m:235)
9 Aktionis.ch 0x4fa33 -[GAIAnalyticsPropertiesStore nextHitNumberForTrackingId:clientId:] (GAIAnalyticsPropertiesStore.m:168)
10 Aktionis.ch 0x49e67 -[GAIBatchingDispatcher queueDispatch:] (GAIBatchingDispatcher.m:692)
11 Aktionis.ch 0x49c9b -[GAIBatchingDispatcher queueModel:] (GAIBatchingDispatcher.m:670)
12 Foundation 0x2fbfbc73 __NSThreadPerformPerform + 386
13 CoreFoundation 0x2f1dd20b __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 14
14 CoreFoundation 0x2f1dc6db __CFRunLoopDoSources0 + 206
15 CoreFoundation 0x2f1daecf __CFRunLoopRun + 622
16 CoreFoundation 0x2f145ebf CFRunLoopRunSpecific + 522
17 CoreFoundation 0x2f145ca3 CFRunLoopRunInMode + 106
18 Foundation 0x2fb391eb -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 254
19 Foundation 0x2fb8a0a1 -[NSRunLoop(NSRunLoop) run] + 80
20 Aktionis.ch 0x38d4d +[GAI threadMain:] (GAI.m:229)
21 Foundation 0x2fbfba5f __NSThread__main__ + 1062
22 libsystem_pthread.dylib 0x39fee919 _pthread_body + 140
23 libsystem_pthread.dylib 0x39fee88b _pthread_start + 102
24 libsystem_pthread.dylib 0x39fecaa4 thread_start + 8
#13. WebCore: CFNetwork Loader
0 libsystem_kernel.dylib 0x39f72a58 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x39f72859 mach_msg + 48
2 CoreFoundation 0x2f1dc84b __CFRunLoopServiceMachPort + 154
3 CoreFoundation 0x2f1daf71 __CFRunLoopRun + 784
4 CoreFoundation 0x2f145ebf CFRunLoopRunSpecific + 522
5 CoreFoundation 0x2f145ca3 CFRunLoopRunInMode + 106
6 WebCore 0x37425bb7 WebCore::runLoaderThread(void*) + 254
7 JavaScriptCore 0x301712e3 WTF::wtfThreadEntryPoint(void*) + 14
8 libsystem_pthread.dylib 0x39fee919 _pthread_body + 140
9 libsystem_pthread.dylib 0x39fee88b _pthread_start + 102
10 libsystem_pthread.dylib 0x39fecaa4 thread_start + 8
#14. WebCore: LocalStorage
0 libsystem_kernel.dylib 0x39f84f2c __psynch_cvwait + 24
1 libsystem_pthread.dylib 0x39fedf27 _pthread_cond_wait + 522
2 libsystem_pthread.dylib 0x39feed65 pthread_cond_wait + 40
3 JavaScriptCore 0x30173dbf WTF::ThreadCondition::timedWait(WTF::Mutex&, double) + 62
4 WebCore 0x375100a9 WTF::PassOwnPtr<WTF::Function<void ()> > WTF::MessageQueue<WTF::Function<void ()> >::waitForMessageFilteredWithTimeout<bool (WTF::Function<void ()>*)>(WTF::MessageQueueWaitResult&, bool (&)(WTF::Function<void ()>*), double) + 108
5 WebCore 0x3751002f WebCore::StorageThread::threadEntryPoint() + 166
6 JavaScriptCore 0x301712e3 WTF::wtfThreadEntryPoint(void*) + 14
7 libsystem_pthread.dylib 0x39fee919 _pthread_body + 140
8 libsystem_pthread.dylib 0x39fee88b _pthread_start + 102
9 libsystem_pthread.dylib 0x39fecaa4 thread_start + 8
#15. Thread
0 libsystem_kernel.dylib 0x39f85c70 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x39fecbdf _pthread_wqthread + 310
2 libsystem_pthread.dylib 0x39feca98 start_wqthread + 8
#16. Thread
0 libsystem_kernel.dylib 0x39f85c70 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x39fecbdf _pthread_wqthread + 310
2 libsystem_pthread.dylib 0x39feca98 start_wqthread + 8
感谢您的帮助