Unreal Engine Issues and Bug Tracker (UE-74701)

Description

In Action RPG Sample, NPC Blueprints "NPC_Goblin_Level_01,02.03" cannot be Duplicated. Crash results lead to ARPGCharacterBase.Cpp Get Health function.

float ARPGCharacterBase::GetHealth() const 
{ 
    return AttributeSet->GetHealth();
}

No Null check exists.

Steps to Reproduce

Open up Action Rpg Sample.
Navigate to Content->Blueprints->NPC
Right Click on NPC_Goblin_Level_01, and choose to Duplicate.

Result: Null Error crash in Action Rpg Character Base.

Expected: Successful duplication of Blueprint.

Callstack

Access violation - code c0000005 (first/second chance not available)

UE4Editor_GameplayAbilities!FGameplayAttributeData::GetCurrentValue() [d:\build\++ue4\sync\engine\plugins\runtime\gameplayabilities\source\gameplayabilities\private\attributeset.cpp:35]
UE4Editor_ActionRPG!ARPGCharacterBase::execGetHealth() [d:\build\++ue4\sync\localbuilds\actionrpg\windows\source\actionrpg\public\rpgcharacterbase.h:21]
UE4Editor_CoreUObject!UFunction::Invoke() [d:\build\++ue4\sync\engine\source\runtime\coreuobject\private\uobject\class.cpp:4861]
UE4Editor_CoreUObject!UObject::CallFunction() [d:\build\++ue4\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:816]
UE4Editor_CoreUObject!UObject::execVirtualFunction() [d:\build\++ue4\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:2436]
UE4Editor_CoreUObject!UObject::execLet() [d:\build\++ue4\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:2116]
UE4Editor_CoreUObject!UObject::ProcessInternal() [d:\build\++ue4\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:1031]
UE4Editor_CoreUObject!UObject::CallFunction() [d:\build\++ue4\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:940]
UE4Editor_CoreUObject!UObject::execVirtualFunction() [d:\build\++ue4\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:2436]
UE4Editor_CoreUObject!UObject::ProcessContextOpcode() [d:\build\++ue4\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:2330]
UE4Editor_CoreUObject!UObject::ProcessInternal() [d:\build\++ue4\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:1031]
UE4Editor_CoreUObject!UObject::CallFunction() [d:\build\++ue4\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:940]
UE4Editor_CoreUObject!UObject::ProcessInternal() [d:\build\++ue4\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:1031]
UE4Editor_CoreUObject!UFunction::Invoke() [d:\build\++ue4\sync\engine\source\runtime\coreuobject\private\uobject\class.cpp:4861]
UE4Editor_CoreUObject!UObject::ProcessEvent() [d:\build\++ue4\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:1480]
UE4Editor_Engine!UAnimInstance::BlueprintUpdateAnimation() [d:\build\++ue4\sync\engine\intermediate\build\win64\ue4editor\inc\engine\animinstance.gen.cpp:670]
UE4Editor_Engine!UAnimInstance::UpdateAnimation() [d:\build\++ue4\sync\engine\source\runtime\engine\private\animation\animinstance.cpp:447]
UE4Editor_Engine!USkeletalMeshComponent::TickAnimation() [d:\build\++ue4\sync\engine\source\runtime\engine\private\components\skeletalmeshcomponent.cpp:1019]
UE4Editor_Engine!USkeletalMeshComponent::InitAnim() [d:\build\++ue4\sync\engine\source\runtime\engine\private\components\skeletalmeshcomponent.cpp:675]
UE4Editor_Engine!USkeletalMeshComponent::OnRegister() [d:\build\++ue4\sync\engine\source\runtime\engine\private\components\skeletalmeshcomponent.cpp:526]
UE4Editor_Engine!UActorComponent::ExecuteRegisterEvents() [d:\build\++ue4\sync\engine\source\runtime\engine\private\components\actorcomponent.cpp:1250]
UE4Editor_Engine!UActorComponent::RegisterComponentWithWorld() [d:\build\++ue4\sync\engine\source\runtime\engine\private\components\actorcomponent.cpp:987]
UE4Editor_Engine!AActor::IncrementalRegisterComponents() [d:\build\++ue4\sync\engine\source\runtime\engine\private\actor.cpp:4234]
UE4Editor_Engine!AActor::RegisterAllComponents() [d:\build\++ue4\sync\engine\source\runtime\engine\private\actor.cpp:4133]
UE4Editor_Engine!AActor::PostSpawnInitialize() [d:\build\++ue4\sync\engine\source\runtime\engine\private\actor.cpp:2910]
UE4Editor_Engine!UWorld::SpawnActor() [d:\build\++ue4\sync\engine\source\runtime\engine\private\levelactor.cpp:467]
UE4Editor_Engine!UWorld::SpawnActor() [d:\build\++ue4\sync\engine\source\runtime\engine\private\levelactor.cpp:295]
UE4Editor_UnrealEd!FClassActorThumbnailScene::SpawnPreviewActor() [d:\build\++ue4\sync\engine\source\editor\unrealed\private\thumbnailhelpers.cpp:1050]
UE4Editor_UnrealEd!UBlueprintThumbnailRenderer::Draw() [d:\build\++ue4\sync\engine\source\editor\unrealed\private\thumbnailrendering\blueprintthumbnailrenderer.cpp:88]
UE4Editor_UnrealEd!ThumbnailTools::RenderThumbnail() [d:\build\++ue4\sync\engine\source\editor\unrealed\private\objecttools.cpp:3857]
UE4Editor_UnrealEd!FAssetThumbnailPool::Tick() [d:\build\++ue4\sync\engine\source\editor\unrealed\private\assetthumbnail.cpp:1039]
UE4Editor_UnrealEd!FTickableEditorObject::TickObjects() [d:\build\++ue4\sync\engine\source\editor\unrealed\public\tickableeditorobject.h:45]
UE4Editor_UnrealEd!UEditorEngine::Tick() [d:\build\++ue4\sync\engine\source\editor\unrealed\private\editorengine.cpp:1517]
UE4Editor_UnrealEd!UUnrealEdEngine::Tick() [d:\build\++ue4\sync\engine\source\editor\unrealed\private\unrealedengine.cpp:403]
UE4Editor!FEngineLoop::Tick() [d:\build\++ue4\sync\engine\source\runtime\launch\private\launchengineloop.cpp:3699]
UE4Editor!GuardedMain() [d:\build\++ue4\sync\engine\source\runtime\launch\private\launch.cpp:174]
UE4Editor!GuardedMainWrapper() [d:\build\++ue4\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:145]
UE4Editor!WinMain() [d:\build\++ue4\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:276]
UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:283]
kernel32
ntdll

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Fixed

Component	Docs - Samples
Affects Versions	4.21, 4.22, 4.23
Target Fix	4.23

Fix Commit	6643676
Main Commit	6955335

Created	May 16, 2019
Resolved	Jun 3, 2019
Updated	Jul 19, 2019

View Jira Issue

UE-74701

Action RPG- ARPG CharacterBase::GetHealth() Null Crash

Action RPG- ARPG CharacterBase::GetHealth() Null Crash

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