Unreal Engine Issues and Bug Tracker (UE-44372)

Description

When duplicating or deleting a component whilst a point light is also a component within an Actor BP, the editor crashes. See callstack for info.

This is a regression.

Working: 4.15.2
Broken: 4.16

Steps to Reproduce

Create a new Blueprint Class based on Actor
With the new BP window open, drag and drop a Point Light from the "Place" tab to the Component window within the actor BP
Right click the point light component and select "Duplicate"

RESULT:
Editor crashes.

EXPECTED RESULT:
Editor does not crash when duplicating a component if point light is also component within Actor BP.

Callstack

UE4Editor_Engine!UActorComponent::RegisterComponentWithWorld() actorcomponent.cpp:924 
UE4Editor_Engine!UActorComponent::RegisterComponent() actorcomponent.cpp:1015 
UE4Editor_Engine!FComponentInstanceDataCache::FComponentInstanceDataCache() componentinstancedatacache.cpp:226 
UE4Editor_Engine!AActor::FActorTransactionAnnotation::FActorTransactionAnnotation() actoreditor.cpp:284 
UE4Editor_Engine!AActor::GetTransactionAnnotation() actoreditor.cpp:339 
UE4Editor_UnrealEd!FTransaction::FObjectRecord::FObjectRecord() editortransaction.cpp:78 
UE4Editor_UnrealEd!FTransaction::SaveObject() editortransaction.cpp:385 
UE4Editor_CoreUObject!SaveToTransactionBuffer() uobjectglobals.cpp:2116 
UE4Editor_CoreUObject!UObject::Modify() obj.cpp:1068 
UE4Editor_Engine!AActor::Modify() actor.cpp:1073 
UE4Editor_Engine!UWorld::DestroyActor() levelactor.cpp:608 
UE4Editor_Engine!UChildActorComponent::DestroyChildActor() childactorcomponent.cpp:604 
UE4Editor_Engine!UActorComponent::ExecuteUnregisterEvents() actorcomponent.cpp:1253 
UE4Editor_Engine!UActorComponent::UnregisterComponent() actorcomponent.cpp:1037 
UE4Editor_Engine!AActor::UnregisterAllComponents() actor.cpp:3983 
UE4Editor_Engine!AActor::PostEditChangeProperty() actoreditor.cpp:124 
UE4Editor_CoreUObject!UObject::PostEditChange() obj.cpp:332 
UE4Editor_UnrealEd!FBlueprintEditorUtils::PostEditChangeBlueprintActors() blueprinteditorutils.cpp:7580 
UE4Editor_Kismet!FBlueprintEditor::OnBlueprintChangedImpl() blueprinteditor.cpp:3191 
UE4Editor_Kismet!TBaseSPMethodDelegateInstance<0,FBlueprintEditor,0,TTypeWrapper<void> __cdecl() delegateinstancesimpl.h:327 
UE4Editor_Kismet!TBaseSPMethodDelegateInstance<0,FBlueprintEditor,0,void __cdecl() delegateinstancesimpl.h:434 
UE4Editor_Engine!TBaseMulticastDelegate<void,UBlueprint * __ptr64>::Broadcast() delegatesignatureimpl.inl:937 
UE4Editor_UnrealEd!FBlueprintEditorUtils::MarkBlueprintAsStructurallyModified() blueprinteditorutils.cpp:2083 
UE4Editor_Kismet!SSCSEditor::AddNewComponent() sscseditor.cpp:4833 
UE4Editor_Kismet!SSCSEditor::OnDuplicateComponent() sscseditor.cpp:3890 
UE4Editor_Kismet!TBaseSPMethodDelegateInstance<0,SSCSEditor,0,TTypeWrapper<void> __cdecl() delegateinstancesimpl.h:327 
UE4Editor_Kismet!TBaseSPMethodDelegateInstance<0,SSCSEditor,0,void __cdecl() delegateinstancesimpl.h:433 
UE4Editor_Slate!FUICommandList::ExecuteAction() uicommandlist.cpp:97 
UE4Editor_Slate!SMenuEntryBlock::OnClicked() smenuentryblock.cpp:1042 
UE4Editor_Slate!SMenuEntryBlock::OnMenuItemButtonClicked() smenuentryblock.cpp:1002 
UE4Editor_Slate!TMemberFunctionCaller<SMenuEntryBlock,FReply() delegateinstanceinterface.h:165 
UE4Editor_Slate!UE4Tuple_Private::TTupleImpl<TIntegerSequence<unsigned int> >::ApplyAfter<TMemberFunctionCaller<SMenuEntryBlock,FReply() tuple.h:497 
UE4Editor_Slate!TBaseSPMethodDelegateInstance<0,SMenuEntryBlock,0,FReply __cdecl() delegateinstancesimpl.h:327 
UE4Editor_Slate!TBaseDelegate<FReply>::Execute() delegatesignatureimpl.inl:537 
UE4Editor_Slate!SButton::OnMouseButtonUp() sbutton.cpp:278 
UE4Editor_Slate!SMenuEntryButton::OnMouseButtonUp() smenuentryblock.cpp:399 
UE4Editor_Slate!<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1>::operator() slateapplication.cpp:5049 
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1> >() slateapplication.cpp:239 
UE4Editor_Slate!FSlateApplication::RoutePointerUpEvent() slateapplication.cpp:5038 
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonUpEvent() slateapplication.cpp:5515 
UE4Editor_Slate!FSlateApplication::OnMouseUp() slateapplication.cpp:5495 
UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() windowsapplication.cpp:1704 
UE4Editor_Core!FWindowsApplication::DeferMessage() windowsapplication.cpp:2127 
UE4Editor_Core!FWindowsApplication::ProcessMessage() windowsapplication.cpp:867 
UE4Editor_Core!FWindowsApplication::AppWndProc() windowsapplication.cpp:714 
user32!<Unknown> 
user32!<Unknown> 
UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() windowsplatformmisc.cpp:980 
UE4Editor!FEngineLoop::Tick() launchengineloop.cpp:3058 
UE4Editor!GuardedMain() launch.cpp:166 
UE4Editor!GuardedMainWrapper() launchwindows.cpp:134 
UE4Editor!WinMain() launchwindows.cpp:210 
UE4Editor!__scrt_common_main_seh() exe_common.inl:264 
kernel32!<Unknown> 
ntdll!<Unknown>

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Fixed

Component	UE - Gameplay - Blueprint Editor
Affects Versions	4.16
Target Fix	4.16

Fix Commit	3410397
Main Commit	3427032
Release Commit	3412456

Created	Apr 25, 2017
Resolved	Apr 26, 2017
Updated	May 6, 2017

View Jira Issue

UE-44372

Crash duplicating or deleting any component inside of Actor BP if lights or triggers are present

Crash duplicating or deleting any component inside of Actor BP if lights or triggers are present

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