Crashlytics线程仅在使用Xcode11构建的iOS13上崩溃

Question

[我的应用仅在具有以下调用堆栈的iOS13上崩溃：

#57. Crashed: com.twitter.crashlytics.ios.exception
0  myapp                          0x105d6d494 CLSProcessRecordAllThreads + 376 (CLSProcess.c:376)
1  myapp                          0x105d6d87c CLSProcessRecordAllThreads + 407 (CLSProcess.c:407)
2  myapp                          0x105d5d58c CLSHandler + 26 (CLSHandler.m:26)
3  myapp                          0x105d6bab4 __CLSExceptionRecord_block_invoke + 198 (CLSException.mm:198)
4  libdispatch.dylib              0x1be5c100c _dispatch_client_callout + 20
5  libdispatch.dylib              0x1be5cd804 _dispatch_lane_barrier_sync_invoke_and_complete + 60
6  myapp                          0x105d6b55c CLSExceptionRecord + 205 (CLSException.mm:205)
7  myapp                          0x105d6b390 CLSExceptionRecordNSException + 102 (CLSException.mm:102)
8  myapp                          0x105d6afb4 CLSTerminateHandler() + 258 (CLSException.mm:258)
9  libc++abi.dylib                0x1be6d9634 std::__terminate(void (*)()) + 20
10 libc++abi.dylib                0x1be6d8f58 __cxa_get_exception_ptr + 34
11 libc++abi.dylib                0x1be6d8f10 __cxxabiv1::exception_cleanup_func(_Unwind_Reason_Code, _Unwind_Exception*) + 126
12 libobjc.A.dylib                0x1be6341f8 _objc_exception_destructor(void*) + 362
13 Foundation                     0x1bee05434 -[NSISEngine tryToOptimizeReturningMutuallyExclusiveConstraints] + 322
14 Foundation                     0x1bebfeb94 -[NSISEngine _optimizeWithoutRebuilding] + 72
15 Foundation                     0x1bebfeaa8 -[NSISEngine optimize] + 116
16 Foundation                     0x1bebfe718 -[NSISEngine performPendingChangeNotifications] + 116
17 UIKitCore                      0x1c2e447c4 -[UIView(Hierarchy) layoutSubviews] + 316
18 UIKitCore                      0x1c23c6948 -[UIButton layoutSubviews] + 596
19 UIKitCore                      0x1c2e57abc -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 2156
20 libobjc.A.dylib                0x1be62faf0 -[NSObject performSelector:withObject:] + 68
21 QuartzCore                     0x1c53f60f4 -[CALayer layoutSublayers] + 292
22 QuartzCore                     0x1c53f63fc CA::Layer::layout_if_needed(CA::Transaction*) + 484
23 QuartzCore                     0x1c5409964 CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 140
24 QuartzCore                     0x1c534ec1c CA::Context::commit_transaction(CA::Transaction*, double) + 308
25 QuartzCore                     0x1c5379bd8 CA::Transaction::commit() + 684
26 QuartzCore                     0x1c537abc0 CA::Transaction::release_thread(void*) + 232
27 libsystem_pthread.dylib        0x1be62c3c0 _pthread_tsd_cleanup + 584
28 libsystem_pthread.dylib        0x1be624dbc _pthread_exit + 84
29 libsystem_pthread.dylib        0x1be626de8 _pthread_wqthread_legacy_worker_wrap + 98
30 libsystem_pthread.dylib        0x1be626b30 _pthread_wqthread + 424
31 libsystem_pthread.dylib        0x1be62cc78 start_wqthread + 8

--

Fatal Exception: NSInternalInconsistencyException
Modifications to the layout engine must not be performed from a background thread after it has been accessed from the main thread.
0  CoreFoundation                 0x1be919c30 __exceptionPreprocess
1  libobjc.A.dylib                0x1be6340c8 objc_exception_throw
2  Foundation                     0x1bee05434 -[NSISEngine tryToOptimizeReturningMutuallyExclusiveConstraints]
3  Foundation                     0x1bebfeb94 -[NSISEngine _optimizeWithoutRebuilding]
4  Foundation                     0x1bebfeaa8 -[NSISEngine optimize]
5  Foundation                     0x1bebfe718 -[NSISEngine performPendingChangeNotifications]
6  UIKitCore                      0x1c2e447c4 -[UIView(Hierarchy) layoutSubviews]
7  UIKitCore                      0x1c23c6948 -[UIButton layoutSubviews]
8  UIKitCore                      0x1c2e57abc -[UIView(CALayerDelegate) layoutSublayersOfLayer:]
9  libobjc.A.dylib                0x1be62faf0 -[NSObject performSelector:withObject:]
10 QuartzCore                     0x1c53f60f4 -[CALayer layoutSublayers]
11 QuartzCore                     0x1c53f63fc CA::Layer::layout_if_needed(CA::Transaction*)
12 QuartzCore                     0x1c5409964 CA::Layer::layout_and_display_if_needed(CA::Transaction*)
13 QuartzCore                     0x1c534ec1c CA::Context::commit_transaction(CA::Transaction*, double)
14 QuartzCore                     0x1c5379bd8 CA::Transaction::commit()
15 QuartzCore                     0x1c537abc0 CA::Transaction::release_thread(void*)
16 libsystem_pthread.dylib        0x1be62c3c0 _pthread_tsd_cleanup
17 libsystem_pthread.dylib        0x1be624dbc _pthread_exit
18 libsystem_pthread.dylib        0x1be626de8 _pthread_wqthread_legacy_worker_wrap
19 libsystem_pthread.dylib        0x1be626b30 _pthread_wqthread
20 libsystem_pthread.dylib        0x1be62cc78 start_wqthread

我绝对不知道，这个问题会发生什么，我该如何复制。它随机崩溃。我在项目中使用Crashlytics v3.14。有人面对同样的问题吗？

Answer 1

为了显示线程的堆栈跟踪，Crashlytics需要在崩溃后运行一些代码。由于此代码是在您应用的一个线程上执行的，因此Crashlytics始终会在此过程中捕获有关其自身执行的信息。您将始终看到执行“ CLSProcessRecordAllThreads”功能的线程。实际上，由于称为内联的编译器优化，您会多次看到它。异常增加了额外的复杂性。当无法捕获Objective-C或C ++异常时，Crashlytics会在允许终止应用程序之前记录有关该异常的一些信息。发生这种情况时，必须在引发异常的线程上运行CLSProcessRecordAllThreads函数。这意味着，在发生异常的情况下，“崩溃”线程将始终看起来像正在运行Crashlytics代码。这是正常现象，只是我们在异常时如何捕获和呈现堆栈跟踪的产物。