Question

从Xcode 10和iOS 12开始，我们的CI服务器会随机失败，因为一个或多个测试在模拟器上崩溃了。

日志文件中的内容类似

Test Case '-[SJDNotificationToObjectIDMarshallerTest testItMarshalsAnObjectID]' started.
Test Case '-[SJDNotificationToObjectIDMarshallerTest testItMarshalsAnObjectID]' passed (0.003 seconds).
objc[43030]: Attempt to use unknown class 0x7fe4a241cfa0.

Restarting after unexpected exit or crash in SJDNotificationToObjectIDMarshallerTest/testItMarshalsAnObjectID; summary will include totals from previous launches.

测试用例在不同的运行中有所不同。错误Attempt to use unknown class始终相同。

很难重现，因为它仅在CI服务器（Mac Mini）上每隔一秒钟进行一次测试。在速度更快的MacBook Pro上，这种情况很少发生。但是我确实在我的机器上复制了几次。在运行测试时，Xcode将暂停并显示崩溃的线程。回溯显示：

* thread #2, queue = 'DTXChannel serializer queue [x1.c1]', stop reason = signal SIGABRT
  * frame #0: 0x000000010ba5801e libsystem_kernel.dylib`__abort_with_payload + 10
    frame #1: 0x000000010ba53561 libsystem_kernel.dylib`abort_with_payload_wrapper_internal + 82
    frame #2: 0x000000010ba5350f libsystem_kernel.dylib`abort_with_reason + 22
    frame #3: 0x0000000108ae91f5 libobjc.A.dylib`_objc_fatalv(unsigned long long, unsigned long long, char const*, __va_list_tag*) + 108
    frame #4: 0x0000000108ae911e libobjc.A.dylib`_objc_fatal(char const*, ...) + 127
    frame #5: 0x0000000108af1409 libobjc.A.dylib`lookUpImpOrForward + 645
    frame #6: 0x0000000108afe814 libobjc.A.dylib`_objc_msgSend_uncached + 68
    frame #7: 0x000000010951ac23 CoreFoundation`__21+[__NSSetI __new::::]_block_invoke + 51
    frame #8: 0x000000010951ab1a CoreFoundation`+[__NSSetI __new::::] + 474
    frame #9: 0x0000000109570ed4 CoreFoundation`+[NSSet setWithObjects:count:] + 52
    frame #10: 0x0000000109571eab CoreFoundation`-[NSSet setByAddingObjectsFromSet:] + 763
    frame #11: 0x000000011c015f44 DTXConnectionServices`-[DTXProxyChannel _allowedClassesForReturnValues] + 109
    frame #12: 0x000000011c016722 DTXConnectionServices`__42-[DTXProxyChannel _sendInvocationMessage:]_block_invoke + 260
    frame #13: 0x000000011c024e76 DTXConnectionServices`__51-[DTXChannel _scheduleMessage:tracker:withHandler:]_block_invoke.751 + 101
    frame #14: 0x000000010b6a651d libdispatch.dylib`_dispatch_call_block_and_release + 12
    frame #15: 0x000000010b6a7587 libdispatch.dylib`_dispatch_client_callout + 8
    frame #16: 0x000000010b6ae058 libdispatch.dylib`_dispatch_lane_serial_drain + 720
    frame #17: 0x000000010b6aeb9b libdispatch.dylib`_dispatch_lane_invoke + 401
    frame #18: 0x000000010b6b79c6 libdispatch.dylib`_dispatch_workloop_worker_thread + 645
    frame #19: 0x000000010ba9061c libsystem_pthread.dylib`_pthread_wqthread + 409
    frame #20: 0x000000010ba90415 libsystem_pthread.dylib`start_wqthread + 13

有人知道发生了什么吗？

在每个运行iOS 12或12.1 Beta的模拟器中，它都可以在Xcode 10 GM和当前的Beta 10.1 10O35n中复制。在iOS 11 Simulator上无法复制。

Answer 1

我花了很多时间试图解决同样的问题。

为我解决此问题的最佳方法是删除OCMocks中的NS-classes：NSString，NSArray等。

我对此没有任何信息，但是这种解决方案对我有用。

在iOS 12模拟器上运行测试时，DTXChannel序列化程序队列中出现随机SIGABRT

1 个答案: