我正在开发的实时应用程序出现故障，我似乎无法重新创建或找到问题。这是崩溃输出：
`Crashed: NSOperationQueue 0x123e7d5c0 (QOS: UNSPECIFIED)
0 libobjc.A.dylib 0x184a52198 objc_release + 104
1 Foundation 0x1850bd930 NSKeyValuePopPendingNotificationLocal + 60
2 Foundation 0x1850bd8ac NSKeyValueDidChange.llvm.947807775919258276 + 364
3 Foundation 0x1850bd2e0 -[NSObject(NSKeyValueObservingPrivate) _changeValueForKeys:count:maybeOldValuesDict:maybeNewValuesDict:usingBlock:] + 624
4 Foundation 0x18500cb1c -[NSObject(NSKeyValueObservingPrivate) _changeValueForKey:key:key:usingBlock:] + 68
5 Foundation 0x1850b8eb8 _NSSetLongLongValueAndNotify + 284
6 CFNetwork 0x1880f4470 _CFNetworkHTTPConnectionCacheSetLimit + 205660
7 Foundation 0x1850d5410 __NSBLOCKOPERATION_IS_CALLING_OUT_TO_A_BLOCK__ + 16
8 Foundation 0x184fdf138 -[NSBlockOperation main] + 100
9 Foundation 0x1850d7698 __NSOPERATION_IS_INVOKING_MAIN__ + 20
10 Foundation 0x184fdedd0 -[NSOperation start] + 732
11 Foundation 0x1850d8090 __NSOPERATIONQUEUE_IS_STARTING_AN_OPERATION__ + 20
12 Foundation 0x1850d7b5c __NSOQSchedule_f + 180
13 libdispatch.dylib 0x18498f7dc _dispatch_block_async_invoke2 + 104
14 libdispatch.dylib 0x1849dd184 _dispatch_client_callout + 16
15 libdispatch.dylib 0x184985a3c _dispatch_continuation_pop$VARIANT$mp + 412
16 libdispatch.dylib 0x184985190 _dispatch_async_redirect_invoke + 600
17 libdispatch.dylib 0x184991fa4 _dispatch_root_queue_drain + 376
18 libdispatch.dylib 0x184992770 _dispatch_worker_thread2 + 128
19 libsystem_pthread.dylib 0x184a2cb48 _pthread_wqthread + 212
20 libsystem_pthread.dylib 0x184a2f760 start_wqthread + 8`
请帮我弄清楚这件事。感谢
它是由FirebasePerformance v3.3.1和XCode 12引起的使用"FirebasePerformance"，"3.3.0"应该可以解决问题
在将FirebasePerformance设置为v3.3.0之后，我们没有看到任何NSKeyValuePopPendingNotificationLocal、AFURLSessionManager、NSKVODeallocate、CFDictionaryGetValue、NSKeyValueWillChange、[NSObject(NSKeyValueObservingPrivate) _changeValueForKeys:count:maybeOldValuesDict:maybeNewValuesDict:usingBlock:]。。。崩溃了。
无故障率从95%恢复到99.9%
我们删除了Firebase性能，从那以后我们再也没有检测到崩溃。我认为问题是由于Xcode 12的Firebase Performance 3.3.1造成的。
我也有同样的问题。我的解决方案是降低Firebase的版本。这个问题应该是由Firebase性能引起的