plugin crash when engine shutdown

[mirchd]

engine version:ue5.5.1 plugin version:the latest version
when engine build with Debug config, the plugin crash on engine shutdown;
when engine build with Development config, everything is ok.
here is the crash log:

LogCrashDebugHelper: GetContextStackTrace() got 28 frames
LogCrashDebugHelper: 0: UnrealEditor_ApplicationCore_Win64_Debug!SharedPointerInternals::FSharedReferencer<1>::operator=() [D:\UnrealEngine\Engine\Source\Runtime\Core\Public\Templates\SharedPointerInternals.h:653]
LogCrashDebugHelper: 1: UnrealEditor_ApplicationCore_Win64_Debug!FWindowsApplication::ShutDownAfterError() [D:\UnrealEngine\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsApplication.cpp:337]
LogCrashDebugHelper: 2: UnrealEditor_ApplicationCore_Win64_Debug!TBaseRawMethodDelegateInstance<0,FWindowsApplication,void __cdecl(void),FDefaultDelegateUserPolicy>::ExecuteIfSafe() [D:\UnrealEngine\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:535]
LogCrashDebugHelper: 3: UnrealEditor_Core_Win64_Debug!TMulticastDelegateBase::Broadcast<IBaseDelegateInstance<void __cdecl(void),FDefaultDelegateUserPolicy> >() [D:\UnrealEngine\Engine\Source\Runtime\Core\Public\Delegates\MulticastDelegateBase.h:257]
LogCrashDebugHelper: 4: UnrealEditor_Core_Win64_Debug!FWindowsErrorOutputDevice::HandleError() [D:\UnrealEngine\Engine\Source\Runtime\Core\Private\Windows\WindowsErrorOutputDevice.cpp:125]
LogCrashDebugHelper: 5: UnrealEditor_Core_Win64_Debug!FWindowsErrorOutputDevice::Serialize() [D:\UnrealEngine\Engine\Source\Runtime\Core\Private\Windows\WindowsErrorOutputDevice.cpp:89]
LogCrashDebugHelper: 6: UnrealEditor_Core_Win64_Debug!FOutputDevice::LogfImpl() [D:\UnrealEngine\Engine\Source\Runtime\Core\Private\Misc\OutputDevice.cpp:81]
LogCrashDebugHelper: 7: UnrealEditor_Core_Win64_Debug!AssertFailedImplV() [D:\UnrealEngine\Engine\Source\Runtime\Core\Private\Misc\AssertionMacros.cpp:150]
LogCrashDebugHelper: 8: UnrealEditor_Core_Win64_Debug!FDebug::CheckVerifyFailedImpl2() [D:\UnrealEngine\Engine\Source\Runtime\Core\Private\Misc\AssertionMacros.cpp:650]
LogCrashDebugHelper: 9: UnrealEditor_HoudiniEngineRuntime_Win64_Debug!FHoudiniEngineRuntime::UnRegisterHoudiniComponent() [D:\ActionRPG\Plugins\HoudiniEngineForUnreal\Source\HoudiniEngineRuntime\Private\HoudiniEngineRuntime.cpp:204]
LogCrashDebugHelper: 10: UnrealEditor_HoudiniEngineRuntime_Win64_Debug!UHoudiniAssetComponent::~UHoudiniAssetComponent() [D:\ActionRPG\Plugins\HoudiniEngineForUnreal\Source\HoudiniEngineRuntime\Private\HoudiniAssetComponent.cpp:287]
LogCrashDebugHelper: 11: UnrealEditor_HoudiniEngineRuntime_Win64_Debug!UHoudiniAssetComponent::`vector deleting destructor'()
LogCrashDebugHelper: 12: UnrealEditor_CoreUObject_Win64_Debug!FObjectPurge::DestroyObjects() [D:\UnrealEngine\Engine\Source\Runtime\CoreUObject\Private\UObject\GarbageCollection.cpp:827]
LogCrashDebugHelper: 13: UnrealEditor_CoreUObject_Win64_Debug!IncrementalDestroyGarbage() [D:\UnrealEngine\Engine\Source\Runtime\CoreUObject\Private\UObject\GarbageCollection.cpp:4851]
LogCrashDebugHelper: 14: UnrealEditor_CoreUObject_Win64_Debug!IncrementalPurgeGarbage() [D:\UnrealEngine\Engine\Source\Runtime\CoreUObject\Private\UObject\GarbageCollection.cpp:4525]
LogCrashDebugHelper: 15: UnrealEditor_CoreUObject_Win64_Debug!PurgeAllUObjectsOnExit() [D:\UnrealEngine\Engine\Source\Runtime\CoreUObject\Private\UObject\GarbageCollection.cpp:6103]
LogCrashDebugHelper: 16: UnrealEditor_CoreUObject_Win64_Debug!StaticExit() [D:\UnrealEngine\Engine\Source\Runtime\CoreUObject\Private\UObject\Obj.cpp:5496]
LogCrashDebugHelper: 17: UnrealEditor_CoreUObject_Win64_Debug!TBaseStaticDelegateInstance<void __cdecl(void),FDefaultDelegateUserPolicy>::ExecuteIfSafe() [D:\UnrealEngine\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:779]
LogCrashDebugHelper: 18: UnrealEditor_Win64_Debug!TMulticastDelegateBase::Broadcast<IBaseDelegateInstance<void __cdecl(void),FDefaultDelegateUserPolicy> >() [D:\UnrealEngine\Engine\Source\Runtime\Core\Public\Delegates\MulticastDelegateBase.h:257]
LogCrashDebugHelper: 19: UnrealEditor_Win64_Debug!FEngineLoop::AppPreExit() [D:\UnrealEngine\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:6858]
LogCrashDebugHelper: 20: UnrealEditor_Win64_Debug!FEngineLoop::Exit() [D:\UnrealEngine\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:5128]
LogCrashDebugHelper: 21: UnrealEditor_Win64_Debug!EngineExit() [D:\UnrealEngine\Engine\Source\Runtime\Launch\Private\Launch.cpp:81]
LogCrashDebugHelper: 22: UnrealEditor_Win64_Debug!GuardedMain() [D:\UnrealEngine\Engine\Source\Runtime\Launch\Private\Launch.cpp:202]
LogCrashDebugHelper: 23: UnrealEditor_Win64_Debug!LaunchWindowsStartup() [D:\UnrealEngine\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:266]
LogCrashDebugHelper: 24: UnrealEditor_Win64_Debug!WinMain() [D:\UnrealEngine\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:317]
LogCrashDebugHelper: 25: UnrealEditor_Win64_Debug!__scrt_common_main_seh() [D:\a_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288]
LogCrashDebugHelper: 26: kernel32
LogCrashDebugHelper: 27: ntdll

please help,

[EALTapia]

I'm also hitting this issue, it looks like the UHoudiniAssetComponent destructor is getting called multiple times.

[EALTapia]

Digging further, the problem is that ~UHoudiniAssetComponent() calls FHoudiniEngineRuntime::Get().UnRegisterHoudiniComponent(this) which calls IsValid(HAC) and errors in debug when GetObjectPtr() checks IsValidIndex as UHoudiniAssetComponent has already been unlinked from the asset array.

Our workaround is just to add a check to UHoudiniAssetComponent to see if it was registered prior to calling UnRegisterHoudiniComponent() since it is unregistered in UHoudiniAssetComponent::BeginDestroy() already.