我们在下面看到了大量的应用程序崩溃。有没有人对可能的原因有什么看法？
我们在所有支持的iOS版本上看到这些崩溃（iOS 9到11）。他们最近在12月12日左右开始。
Crashed: io.answers.EventQueue (QOS: BACKGROUND)
EXC_BREAKPOINT 0x0000000102467200
0
libswiftCore.dylib
specialized _fatalErrorMessage(_:_:file:line:flags:) + 63112
1 libswiftCore.dylib
static ImplicitlyUnwrappedOptional._forceBridgeFromObjectiveC(_:result:) + 5184
2 libswiftCore.dylib
protocol witness for _ObjectiveCBridgeable._bridgeToObjectiveC() in conformance <A> A! + 70672
3 libswiftCore.dylib
bridgeAnythingNonVerbatimToObjectiveC(swift::OpaqueValue*, swift::TargetMetadata<swift::InProcess> const*, bool) + 144
4 libswiftCore.dylib
bridgeAnythingNonVerbatimToObjectiveC(swift::OpaqueValue*, swift::TargetMetadata<swift::InProcess> const*, bool) + 200
5 libswiftCore.dylib
_SwiftDeferredNSDictionary.bridgeEverything() + 58432
6 libswiftCore.dylib
specialized _SwiftDeferredNSDictionary.enumerateKeysAndObjects(options:using:) + 30288
7 libswiftCore.dylib
_SwiftDeferredNSDictionary.enumerateKeysAndObjects(options:using:) + 57856
8
libswiftCore.dylib
@objc _SwiftDeferredNSDictionary.enumerateKeysAndObjects(options:using:) + 59092
9 udemy-mobile-ios
-[ANSAttributeDictionary initWithDictionary:] + 4347003980
10 udemy-mobile-ios
-[ANSCustomEvent attributesDictionary] + 4347045360
11 udemy-mobile-ios
-[ANSCustomEvent dictionaryRepresentation] + 4347045140
12 udemy-mobile-ios
-[ANSWriteEventOperation generateFormattedLogLineWithEvent:] + 4347021348
13 udemy-mobile-ios
-[ANSWriteEventOperation initWithEvent:metadata:logFileUrl:] + 4347019544
14 udemy-mobile-ios
__37-[ANSAnswersController enqueueEvent:]_block_invoke + 4347057216
15
Foundation
__NSBLOCKOPERATION_IS_CALLING_OUT_TO_A_BLOCK__ + 16
25
libsystem_pthread.dylib
start_wqthread + 4