[💬] 언리얼 0xffffffff 에러 질문

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별거 없는 그리고 문제가 일어날 것 같지도 않은 코드에서 종종 에러가 발생함

위 함수는 UFUNCTION(Client, Reliable) 이고 코드가 저게 끝임

GameModeBase 에서 특정 조건을 만족하면 모든 플레이어에게 게임오버 위젯을 띄워줌

IsValid로 유효성 검사까지 마친 후에 IsInViewport 함수 호출에서 0xffffffff 에러가 나옴

0x00000000 에러면 GameOverWidget 이 제대로 생성이 안됐다는 것으로 추정이 될텐데 0xffffffff 에러는 어떤 종류의 에러임?

vs에서 디버깅 돌려서 좀 제대로 확인해보려고 하면 절대로 에러 안나고 패키징 된 상태에서만 에러가 발생해서 정확한 에러 찾기도 어려운 상황임

심지어 항상 발생하는 에러도 아님

에러 로그는 다음과 같음

Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0xffffffffffffffff 0x00007ff625a68196 MoonEaterClient-Win64-DebugGame.exe!UUserWidget::IsInViewport() [F:\Programs\UnrealEngine_Github\Engine\Source\Runtime\UMG\Private\UserWidget.cpp:1026] 0x00007ff62276bde1 MoonEaterClient-Win64-DebugGame.exe!AMEPlayerUIManager::ClientShowGameOver_Implementation() [F:\College Project\MoonEater\Source\MoonEater\Private\UI\MEPlayerUIManager.cpp:252] 0x00007ff6227a11cb MoonEaterClient-Win64-DebugGame.exe!AMEPlayerUIManager::execClientShowGameOver() [F:\College Project\MoonEater\Intermediate\Build\Win64\MoonEaterClient\Inc\MoonEater\MEPlayerUIManager.gen.cpp:86] 0x00007ff622e93989 MoonEaterClient-Win64-DebugGame.exe!UFunction::Invoke() [F:\Programs\UnrealEngine_Github\Engine\Source\Runtime\CoreUObject\Private\UObject\Class.cpp:5680] 0x00007ff623126237 MoonEaterClient-Win64-DebugGame.exe!UObject::ProcessEvent() [F:\Programs\UnrealEngine_Github\Engine\Source\Runtime\CoreUObject\Private\UObject\ScriptCore.cpp:2018] 0x00007ff625f0f40e MoonEaterClient-Win64-DebugGame.exe!AActor::ProcessEvent() [F:\Programs\UnrealEngine_Github\Engine\Source\Runtime\Engine\Private\Actor.cpp:863] 0x00007ff62637df80 MoonEaterClient-Win64-DebugGame.exe!FObjectReplicator::ReceivedRPC() [F:\Programs\UnrealEngine_Github\Engine\Source\Runtime\Engine\Private\DataReplication.cpp:1286] 0x00007ff62637c3fc MoonEaterClient-Win64-DebugGame.exe!FObjectReplicator::ReceivedBunch() [F:\Programs\UnrealEngine_Github\Engine\Source\Runtime\Engine\Private\DataReplication.cpp:1087] 0x00007ff62631339a MoonEaterClient-Win64-DebugGame.exe!UActorChannel::ProcessBunch() [F:\Programs\UnrealEngine_Github\Engine\Source\Runtime\Engine\Private\DataChannel.cpp:2849] 0x00007ff62631aa5f MoonEaterClient-Win64-DebugGame.exe!UActorChannel::ReceivedBunch() [F:\Programs\UnrealEngine_Github\Engine\Source\Runtime\Engine\Private\DataChannel.cpp:2690] 0x00007ff62631e93b MoonEaterClient-Win64-DebugGame.exe!UChannel::ReceivedSequencedBunch() [F:\Programs\UnrealEngine_Github\Engine\Source\Runtime\Engine\Private\DataChannel.cpp:414] 0x00007ff62631de58 MoonEaterClient-Win64-DebugGame.exe!UChannel::ReceivedNextBunch() [F:\Programs\UnrealEngine_Github\Engine\Source\Runtime\Engine\Private\DataChannel.cpp:823] 0x00007ff62631e4aa MoonEaterClient-Win64-DebugGame.exe!UChannel::ReceivedRawBunch() [F:\Programs\UnrealEngine_Github\Engine\Source\Runtime\Engine\Private\DataChannel.cpp:510] 0x00007ff6266f61f1 MoonEaterClient-Win64-DebugGame.exe!UNetConnection::ReceivedPacket() [F:\Programs\UnrealEngine_Github\Engine\Source\Runtime\Engine\Private\NetConnection.cpp:2785] 0x00007ff6266f7a75 MoonEaterClient-Win64-DebugGame.exe!UNetConnection::ReceivedRawPacket() [F:\Programs\UnrealEngine_Github\Engine\Source\Runtime\Engine\Private\NetConnection.cpp:1320] 0x00007ff62261d5d0 MoonEaterClient-Win64-DebugGame.exe!UIpNetDriver::TickDispatch() [F:\Programs\UnrealEngine_Github\Engine\Plugins\Online\OnlineSubsystemUtils\Source\OnlineSubsystemUtils\Private\IpNetDriver.cpp:1177] 0x00007ff62672f960 MoonEaterClient-Win64-DebugGame.exe!TBaseUObjectMethodDelegateInstance<0,UNetDriver,void __cdecl(float),FDefaultDelegateUserPolicy>::ExecuteIfSafe() [F:\Programs\UnrealEngine_Github\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:611] 0x00007ff6233c0420 MoonEaterClient-Win64-DebugGame.exe!TMulticastDelegate<void __cdecl(float),FDefaultDelegateUserPolicy>::Broadcast() [F:\Programs\UnrealEngine_Github\Engine\Source\Runtime\Core\Public\Delegates\DelegateSignatureImpl.inl:955] 0x00007ff6265de5ef MoonEaterClient-Win64-DebugGame.exe!UWorld::Tick() [F:\Programs\UnrealEngine_Github\Engine\Source\Runtime\Engine\Private\LevelTick.cpp:1337] 0x00007ff62642edc3 MoonEaterClient-Win64-DebugGame.exe!UGameEngine::Tick() [F:\Programs\UnrealEngine_Github\Engine\Source\Runtime\Engine\Private\GameEngine.cpp:1823] 0x00007ff6218682f7 MoonEaterClient-Win64-DebugGame.exe!FEngineLoop::Tick() [F:\Programs\UnrealEngine_Github\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:4921] 0x00007ff62187e76c MoonEaterClient-Win64-DebugGame.exe!GuardedMain() [F:\Programs\UnrealEngine_Github\Engine\Source\Runtime\Launch\Private\Launch.cpp:178] 0x00007ff62187e83a MoonEaterClient-Win64-DebugGame.exe!GuardedMainWrapper() [F:\Programs\UnrealEngine_Github\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:137] 0x00007ff621880c8c MoonEaterClient-Win64-DebugGame.exe!LaunchWindowsStartup() [F:\Programs\UnrealEngine_Github\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:273] 0x00007ff621892834 MoonEaterClient-Win64-DebugGame.exe!WinMain() [F:\Programs\UnrealEngine_Github\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:321] 0x00007ff627f8136e MoonEaterClient-Win64-DebugGame.exe!__scrt_common_main_seh() [d:\a01\_work\6\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288] 0x00007ffc7b4a7034 KERNEL32.DLL!UnknownFunction [] 0x00007ffc7b682651 ntdll.dll!UnknownFunction []

어떤 문제일까

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널에서 마이너스 했거나 널 메모리에 오버플로우 난거 아님?

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음 그랬을 확률은 아마 없을듯

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나도 언리얼을 써본건 아니라 0xfffff가 나올 경우의 수만 생각

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어렵네

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한번 그렇게 디버깅해볼게 땡큐