React Native：EXC_BAD_ACCESS·尝试取消引用垃圾指针

Question

在过去的几个月中，我们一直在我们的应用程序中随机出现这些错误，这些错误显示在Bugsnag中。它们肯定会导致崩溃，因为我们的团队内部成员已经报告了崩溃，但随后无法重现它们。这是完整的痕迹：

EXC_BAD_ACCESS Attempted to dereference garbage pointer 0x167f4beb8. 
/usr/lib/libobjc.A.dylib objc_msgSend
Frameworks/Foundation.framework/Foundation -[NSObject(NSKeyValueObservingPrivate) _changeValueForKeys:count:maybeOldValuesDict:usingBlock:]
Frameworks/Foundation.framework/Foundation -[NSObject(NSKeyValueObservingPrivate) _changeValueForKey:key:key:usingBlock:]
Frameworks/Foundation.framework/Foundation -[NSOperationQueue setMaxConcurrentOperationCount:]
GreatJonesStreet-Prod mh_execute_header
GreatJonesStreet-Prod mh_execute_header
GreatJonesStreet-Prod mh_execute_header
/usr/lib/system/libdispatch.dylib __dispatch_call_block_and_release
/usr/lib/system/libdispatch.dylib __dispatch_client_callout
/usr/lib/system/libdispatch.dylib __dispatch_queue_override_invoke
/usr/lib/system/libdispatch.dylib __dispatch_root_queue_drain
/usr/lib/system/libdispatch.dylib __dispatch_worker_thread3
/usr/lib/system/libsystem_pthread.dylib __pthread_wqthread

我已经在多个地方读到其他人都遇到了这个问题，而Bugsnag（真是具有讽刺意味）似乎是在发现该问题时提到的常见问题。我并不是说Bugsnag是造成此问题的原因，但是人们一直在报告他们在Bugsnag报告中看到了崩溃日志。只是奇怪的巧合。

这是另一个：

EXC_BAD_ACCESS Attempted to dereference garbage pointer 0xa8a94beb8. 
/usr/lib/libobjc.A.dylib objc_msgSend
Frameworks/Foundation.framework/Foundation -[NSObject(NSKeyValueObservingPrivate) _changeValueForKeys:count:maybeOldValuesDict:usingBlock:]
Frameworks/Foundation.framework/Foundation -[NSObject(NSKeyValueObservingPrivate) _changeValueForKey:key:key:usingBlock:]
Frameworks/Foundation.framework/Foundation -[NSOperationQueue setMaxConcurrentOperationCount:]
GreatJonesStreet mh_execute_header
GreatJonesStreet mh_execute_header
GreatJonesStreet mh_execute_header
/usr/lib/system/libdispatch.dylib __dispatch_call_block_and_release
/usr/lib/system/libdispatch.dylib __dispatch_client_callout
/usr/lib/system/libdispatch.dylib __dispatch_queue_override_invoke
/usr/lib/system/libdispatch.dylib __dispatch_root_queue_drain
/usr/lib/system/libdispatch.dylib __dispatch_worker_thread3
/usr/lib/system/libsystem_pthread.dylib __pthread_wqthread

在发布此问题时，上述错误中有75个发生在我们的56位用户中。

有人有想法么？？？