Unreal Engine Issues and Bug Tracker (UE-22555)

Description

Using NewObject inside PostInitProperties and creating a BP of the class will cause the editor to crash on PIE if the BP is is set in gamemode defaults

Steps to Reproduce

Open UE4Editor (any project)
Add code to project based on pawn (MyPawn)

In MyPawn.h add the following:

	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = Test)
		UCapsuleComponent* PlayerComponent;

	virtual void PostInitProperties() override;

In MyPawn.cpp add the following:

void AMyPawn::PostInitProperties()
{
	Super::PostInitProperties();

	PlayerComponent = NewObject<UCapsuleComponent>(this);
	PlayerComponent->AttachTo(RootComponent);
}

Compile
In the editor, create a BP based on MyPawn (MyPawnBP) and Gamemode (NewGameModeBP)
In NewGameModeBP set the default pawn to MyPawnBP
PIE

Result:
The editor crashes after clicking Play button

Callstack

MachineId:9FA88CA44B7C623122B0039D6C8BA1B0
EpicAccountId:c807849e05a0413d99e379f2802cae9c

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

""

UE4Editor_Engine!UWorld::EncroachingBlockingGeometry() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\engine\private\levelactor.cpp:987]
UE4Editor_Engine!AGameMode::ChoosePlayerStart_Implementation() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\engine\private\gamemode.cpp:1455]
UE4Editor_Engine!AGameMode::execChoosePlayerStart() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\engine\classes\gameframework\gamemode.h:67]
UE4Editor_CoreUObject!UFunction::Invoke() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\coreuobject\private\uobject\class.cpp:4195]
UE4Editor_CoreUObject!UObject::ProcessEvent() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:1046]
UE4Editor_Engine!AActor::ProcessEvent() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\engine\private\actor.cpp:580]
UE4Editor_Engine!AGameMode::ChoosePlayerStart() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\intermediate\build\win64\ue4editor\inc\engine\engine.generated.1.cpp:4557]
UE4Editor_Engine!AGameMode::FindPlayerStart_Implementation() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\engine\private\gamemode.cpp:379]
UE4Editor_Engine!AGameMode::execFindPlayerStart() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\engine\classes\gameframework\gamemode.h:67]
UE4Editor_CoreUObject!UFunction::Invoke() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\coreuobject\private\uobject\class.cpp:4195]
UE4Editor_CoreUObject!UObject::ProcessEvent() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:1046]
UE4Editor_Engine!AActor::ProcessEvent() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\engine\private\actor.cpp:580]
UE4Editor_Engine!AGameMode::FindPlayerStart() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\intermediate\build\win64\ue4editor\inc\engine\engine.generated.1.cpp:4565]
UE4Editor_Engine!AGameMode::InitNewPlayer() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\engine\private\gamemode.cpp:1016]
UE4Editor_Engine!AGameMode::Login() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\engine\private\gamemode.cpp:1057]
UE4Editor_Engine!UWorld::SpawnPlayActor() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\engine\private\levelactor.cpp:665]
UE4Editor_Engine!ULocalPlayer::SpawnPlayActor() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\engine\private\localplayer.cpp:219]
UE4Editor_Engine!UGameInstance::StartPIEGameInstance() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\engine\private\gameinstance.cpp:253]
UE4Editor_UnrealEd!UEditorEngine::CreatePIEGameInstance() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\editor\unrealed\private\playlevel.cpp:3137]
UE4Editor_UnrealEd!UEditorEngine::PlayInEditor() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\editor\unrealed\private\playlevel.cpp:2385]
UE4Editor_UnrealEd!UEditorEngine::StartQueuedPlayMapRequest() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\editor\unrealed\private\playlevel.cpp:1066]
UE4Editor_UnrealEd!UEditorEngine::Tick() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\editor\unrealed\private\editorengine.cpp:1244]
UE4Editor_UnrealEd!UUnrealEdEngine::Tick() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\editor\unrealed\private\unrealedengine.cpp:366]
UE4Editor!FEngineLoop::Tick() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\launch\private\launchengineloop.cpp:2428]
UE4Editor!GuardedMain() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\launch\private\launch.cpp:142]
UE4Editor!GuardedMainWrapper() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\launch\private\windows\launchwindows.cpp:200]

Have Comments or More Details?

Head over to the existing Questions & Answers thread and let us know what's up.

0	Login to Vote

Cannot Reproduce

Component	UE - Gameplay - Blueprint
Affects Versions	4.9.2
Target Fix	4.13

Created	Oct 23, 2015
Resolved	May 16, 2016
Updated	Apr 27, 2018

View Jira Issue

UE-22555

Using NewObject inside PostInitProperties causes the editor to crash

Using NewObject inside PostInitProperties causes the editor to crash

Have Comments or More Details?