Runtime error on bind function to delegate

Development Character & Animation
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1

Now I’m trying to refactoring about Character and AnimInstance.

Main Purpose is Set Mesh and Montage in BP like this.

279985-testcharacter.png
279985-testcharacter.png1338×956 83.4 KB

After Refactoring the code, I got a runtime error on bind function to delegate and editor is crashed.

LimbusCharacterBase.cpp

#include "LimbusCharacterBase.h"
#include "LimbusAnimInstanceBase.h"
#include "Delegate.h"
#include "Engine.h"
#include "LimbusCharacterState.h"

// Sets default values
ALimbusCharacterBase::ALimbusCharacterBase()
{
        ....
        void ALimbusCharacterBase::PostInitializeComponents(){
	        Super::PostInitializeComponents();
	        LimbusAnim = Cast<ULimbusAnimInstanceBase>(GetMesh()->GetAnimInstance());
	        LimbusAnim->OnMontageEnded.AddDynamic(this, &ALimbusCharacterBase::OnAttackMontageEnded);
            //Error occur on below line
	        LimbusAnim->OnNextAttackCheck.AddUObject(this, &ALimbusCharacterBase::OnComboAttackCheck);
	        LimbusAnim->OnAttackHitCheck.AddUObject(this, &ALimbusCharacterBase::AttackCheck);
        }
        ....
        void ALimbusCharacterBase::OnAttackMontageEnded(UAnimMontage * Montage, bool bInterrupted){
        	GEngine->AddOnScreenDebugMessage(-1, 0.5f, FColor::Red, TEXT("OnAttackMontageEnded"));
        	UE_LOG(LogTemp, Warning, TEXT("OnAttackMontageEnded"));
         	isAttacking = false;
	        AttackEndComboState();
        }

        void ALimbusCharacterBase::OnComboAttackCheck(){
        	GEngine->AddOnScreenDebugMessage(-1, 0.5f, FColor::Red, TEXT("OnComboAttackCheck"));
        	UE_LOG(LogTemp, Warning, TEXT("OnComboAttackCheck"));
        	canNextCombo = false;
        	if (isComboInputOn) {
		        AttackStartComboState();
		        LimbusAnim->JumpToMontageSection(AttackMontage, currentCombo);
	        }
        }

        void ALimbusCharacterBase::AttackCheck(){
        	GEngine->AddOnScreenDebugMessage(-1, 0.5f, FColor::Red, TEXT("AttackCheck"));
        	UE_LOG(LogTemp, Warning, TEXT("AttackCheck"));
        	FHitResult HitResult;
        	FVector StartLocation = GetActorLocation();
        	FVector EndLocation = StartLocation + (Camera->GetForwardVector() * 75.0f);
        	FCollisionQueryParams Params(NAME_None, false, this);
        	bool bResult = GetWorld()->SweepSingleByChannel(HitResult, StartLocation, EndLocation, FQuat::Identity, ECollisionChannel::ECC_GameTraceChannel2, FCollisionShape::MakeSphere(75.0f), Params);

        	if (bResult) {
        		if (HitResult.Actor.IsValid()) {
		        	UE_LOG(LogTemp, Warning, TEXT("Hit!!"));
		        	FDamageEvent DamageEvent;
		        	HitResult.Actor->TakeDamage(getDamage(), DamageEvent, GetController(), this);
	        	}
        	}
        }
}

LimbusAnimInstanceBase.h

#include "CoreMinimal.h"
#include "Animation/AnimInstance.h"
#include "ConstructorHelpers.h"
#include "GameFramework/CharacterMovementComponent.h"
#include "Engine/Classes/GameFramework/Actor.h"
#include "Engine/Classes/Animation/AnimMontage.h"
#include "Delegates/Delegate.h"
#include "LimbusAnimInstanceBase.generated.h"

DECLARE_MULTICAST_DELEGATE(FOnNextAttackCheckDelegate);
DECLARE_MULTICAST_DELEGATE(FOnAttackHitCheckDelegate);

UCLASS()
class LIMBUS_API ULimbusAnimInstanceBase : public UAnimInstance{
	GENERATED_BODY()

public:
        .....
	FOnNextAttackCheckDelegate OnNextAttackCheck;
	FOnAttackHitCheckDelegate OnAttackHitCheck;
        .....
}

Full crash report ishere

Unhandled exception

UE4Editor_Limbus_1826!TMulticastScriptDelegate<FWeakObjectPtr>::Add() [e:\epic games\ue_4.22\engine\source\runtime\core\public\uobject\scriptdelegates.h:324]
UE4Editor_Limbus_1826!ALimbusCharacterBase::PostInitializeComponents() [g:\project\limbus\source\limbus\private\character\limbuscharacterbase.cpp:97]
UE4Editor_Engine!AActor::PostActorConstruction() [d:\build\++ue4\sync\engine\source\runtime\engine\private\actor.cpp:3173]
UE4Editor_Engine!AActor::FinishSpawning() [d:\build\++ue4\sync\engine\source\runtime\engine\private\actor.cpp:3099]
UE4Editor_Engine!AActor::PostSpawnInitialize() [d:\build\++ue4\sync\engine\source\runtime\engine\private\actor.cpp:3041]
UE4Editor_Engine!UWorld::SpawnActor() [d:\build\++ue4\sync\engine\source\runtime\engine\private\levelactor.cpp:478]
UE4Editor_Engine!AGameModeBase::SpawnDefaultPawnAtTransform_Implementation() [d:\build\++ue4\sync\engine\source\runtime\engine\private\gamemodebase.cpp:1180]
UE4Editor_Engine!AGameModeBase::execSpawnDefaultPawnAtTransform() [d:\build\++ue4\sync\engine\source\runtime\engine\classes\gameframework\gamemodebase.h:48]
UE4Editor_CoreUObject!UFunction::Invoke() [d:\build\++ue4\sync\engine\source\runtime\coreuobject\private\uobject\class.cpp:4643]
UE4Editor_CoreUObject!UObject::ProcessEvent() [d:\build\++ue4\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:1464]
UE4Editor_Engine!AActor::ProcessEvent() [d:\build\++ue4\sync\engine\source\runtime\engine\private\actor.cpp:769]
UE4Editor_Engine!AGameModeBase::SpawnDefaultPawnAtTransform() [d:\build\++ue4\sync\engine\intermediate\build\win64\ue4editor\inc\engine\gamemodebase.gen.cpp:187]
UE4Editor_Engine!AGameModeBase::SpawnDefaultPawnFor_Implementation() [d:\build\++ue4\sync\engine\source\runtime\engine\private\gamemodebase.cpp:1172]
UE4Editor_Engine!AGameModeBase::execSpawnDefaultPawnFor() [d:\build\++ue4\sync\engine\source\runtime\engine\classes\gameframework\gamemodebase.h:48]
UE4Editor_CoreUObject!UFunction::Invoke() [d:\build\++ue4\sync\engine\source\runtime\coreuobject\private\uobject\class.cpp:4643]
UE4Editor_CoreUObject!UObject::ProcessEvent() [d:\build\++ue4\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:1464]
UE4Editor_Engine!AActor::ProcessEvent() [d:\build\++ue4\sync\engine\source\runtime\engine\private\actor.cpp:769]
UE4Editor_Engine!AGameModeBase::SpawnDefaultPawnFor() [d:\build\++ue4\sync\engine\intermediate\build\win64\ue4editor\inc\engine\gamemodebase.gen.cpp:196]
UE4Editor_Engine!AGameModeBase::RestartPlayerAtPlayerStart() [d:\build\++ue4\sync\engine\source\runtime\engine\private\gamemodebase.cpp:1244]
UE4Editor_Engine!AGameModeBase::RestartPlayer() [d:\build\++ue4\sync\engine\source\runtime\engine\private\gamemodebase.cpp:1211]
UE4Editor_Engine!AGameModeBase::HandleStartingNewPlayer_Implementation() [d:\build\++ue4\sync\engine\source\runtime\engine\private\gamemodebase.cpp:1025]
UE4Editor_Engine!AGameModeBase::execHandleStartingNewPlayer() [d:\build\++ue4\sync\engine\source\runtime\engine\classes\gameframework\gamemodebase.h:48]
UE4Editor_CoreUObject!UFunction::Invoke() [d:\build\++ue4\sync\engine\source\runtime\coreuobject\private\uobject\class.cpp:4643]
UE4Editor_CoreUObject!UObject::ProcessEvent() [d:\build\++ue4\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:1464]
UE4Editor_Engine!AActor::ProcessEvent() [d:\build\++ue4\sync\engine\source\runtime\engine\private\actor.cpp:769]
UE4Editor_Engine!AGameModeBase::HandleStartingNewPlayer() [d:\build\++ue4\sync\engine\intermediate\build\win64\ue4editor\inc\engine\gamemodebase.gen.cpp:102]
UE4Editor_Engine!UWorld::SpawnPlayActor() [d:\build\++ue4\sync\engine\source\runtime\engine\private\levelactor.cpp:774]
UE4Editor_Engine!ULocalPlayer::SpawnPlayActor() [d:\build\++ue4\sync\engine\source\runtime\engine\private\localplayer.cpp:285]
UE4Editor_Engine!UGameInstance::StartPlayInEditorGameInstance() [d:\build\++ue4\sync\engine\source\runtime\engine\private\gameinstance.cpp:387]
UE4Editor_UnrealEd!UEditorEngine::CreatePIEGameInstance() [d:\build\++ue4\sync\engine\source\editor\unrealed\private\playlevel.cpp:3341]
UE4Editor_UnrealEd!UEditorEngine::PlayInEditor() [d:\build\++ue4\sync\engine\source\editor\unrealed\private\playlevel.cpp:2466]
UE4Editor_UnrealEd!UEditorEngine::StartQueuedPlayMapRequest() [d:\build\++ue4\sync\engine\source\editor\unrealed\private\playlevel.cpp:1280]
UE4Editor_UnrealEd!UEditorEngine::Tick() [d:\build\++ue4\sync\engine\source\editor\unrealed\private\editorengine.cpp:1532]
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:3967]
UE4Editor!GuardedMain() [d:\build\++ue4\sync\engine\source\runtime\launch\private\launch.cpp:168]
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:275]
UE4Editor!__scrt_common_main_seh() [d:\agent\_work\3\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288]
kernel32
ntdll

I cannot find the reason of this error.

Is there something wrong or do I miss something?

2

Try to use AddDynamic instead of AddUObject

3

It still not works.
AddDynamic can be used with dynamic multicast delegate so I tried that change multicast delegate to dynamic multicast delegate.
But still same crash and same reports.

4

You should have the same params on function and delegate. It is strange that you didnt had a compilation error.

Someting like this:

in .h

DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FMySignature, bool, IsOk, AActor*, MyActor); //"," between type and variable name

UFunction() //do not forget that
void MyActor::Bar(bool IsOk, AActor* MyActor){};

FMySignature OnEvent;

in .cpp

OnEvent.Broacast(b, MyActor);