Unreal Engine Issues

UE-158184

Crash may occur if Actor is selected on the outliner and then discarded

Crash may occur if Actor is selected on the outliner and then discarded

Description

Discarding Actor while it is selected on the outliner may cause a crash.

This may be caused by operations from C++ not being listed in the UNDO list, which may refer to unreferenced objects during garbage collection.

Steps to Reproduce
  1. Open the attached project.
  2. Run editor utility widget `/Game/DeleteActorのEditorUtilityWidget`.
  3. Press "DeleteSelectedActor" button.
  4. Open menu [Edit]->[Undo History]
  5. Select and delete "Add Actor" in Undo History list.
  6. Execute console command "obj gc" in output log window.

Then, cause crash.

 

Callstack
Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000018UnrealEditor_CoreUObject!UObjectBaseUtility::GetFullName() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectBaseUtility.cpp:107]
UnrealEditor_CoreUObject!UObjectBaseUtility::GetFullName() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectBaseUtility.cpp:91]
UnrealEditor_Engine!TTypedElementInternalData<FActorElementData>::GetDebugId() [D:\build\++UE5\Sync\Engine\Source\Runtime\TypedElementFramework\Public\Elements\Framework\TypedElementData.h:331]
UnrealEditor_Engine!FTypedElementInternalData::CheckNoExternalReferencesOnDestruction() [D:\build\++UE5\Sync\Engine\Source\Runtime\TypedElementFramework\Public\Elements\Framework\TypedElementData.h:276]
UnrealEditor_Engine!UTypedElementRegistry::TRegisteredElementType<FActorElementData,1>::ProcessDeferredElementsToRemove() [D:\build\++UE5\Sync\Engine\Source\Runtime\TypedElementFramework\Public\Elements\Framework\TypedElementRegistry.h:469]
UnrealEditor_TypedElementFramework!UTypedElementRegistry::ProcessDeferredElementsToDestroy() [D:\build\++UE5\Sync\Engine\Source\Runtime\TypedElementFramework\Private\Elements\Framework\TypedElementRegistry.cpp:149]
UnrealEditor_TypedElementFramework!UTypedElementRegistry::OnEndFrame() [D:\build\++UE5\Sync\Engine\Source\Runtime\TypedElementFramework\Private\Elements\Framework\TypedElementRegistry.cpp:334]
UnrealEditor_TypedElementFramework!TBaseUObjectMethodDelegateInstance<0,UTypedElementRegistry,void __cdecl(void),FDefaultDelegateUserPolicy>::ExecuteIfSafe() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:611]
UnrealEditor!TMulticastDelegate<void __cdecl(void),FDefaultDelegateUserPolicy>::Broadcast() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateSignatureImpl.inl:967]
UnrealEditor!FEngineLoop::Tick() [D:\build\++UE5\Sync\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:5459]
UnrealEditor!GuardedMain() [D:\build\++UE5\Sync\Engine\Source\Runtime\Launch\Private\Launch.cpp:183]
UnrealEditor!GuardedMainWrapper() [D:\build\++UE5\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:147]
UnrealEditor!LaunchWindowsStartup() [D:\build\++UE5\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:283]
UnrealEditor!WinMain() [D:\build\++UE5\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:330]
UnrealEditor!__scrt_common_main_seh() [d:\a01\_work\6\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288]
kernel32
ntdll

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Non-Issue
ComponentUE - Editor - Workflow Systems
Affects Versions5.0
CreatedJul 1, 2022
ResolvedSep 12, 2023
UpdatedJan 20, 2024
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