Unreal Engine Issues and Bug Tracker (UE-181821)

Description

This is not a regression. Tested in //UE5/Release-5.1 CL23901901

Editor crashes with an assertion after interaction with an Instance Static Mesh component that is in a locked level. This doesn't affect World partition enable maps as they can't access the Levels Menu.

Steps to Reproduce

Create or open any project
Create a new Basic Level
Create a new Blueprint Actor
Add an Instanced Static Mesh component to the Actor Blueprint
In the Details Panel of the ISM Component set the Static Mesh to a Cube or other easily identifiable mesh
In the Details Panel under Instances add an instance
Compile, save, and close the Blueprint Actor
Place the Actor in the level
Select Windows > Levels
In the Level menu select the lock icon to the right of Persistent Level
In the Viewport select the Instanced Static Mesh of the Blueprint Actor

Expected Results:
No selection is made.

Actual Results:
The Editor crashes with an Assertion

Callstack

Assertion failed: bIsTemplate || !bLevelLocked [File:D:\build\++UE5\Sync\Engine\Source\Editor\UnrealEd\Private\EditorSelectUtils.cpp] [Line: 339]

UnrealEditor_UnrealEd!<lambda_9cccf36a28c09534f6fd7b9dc0ae7046>::operator()() [D:\build\++UE5\Sync\Engine\Source\Editor\UnrealEd\Private\EditorSelectUtils.cpp:339]
UnrealEditor_UnrealEd!TTypedElementList<FTypedElementHandle>::ForEachElement<ITypedElementWorldInterface>() [D:\build\++UE5\Sync\Engine\Source\Runtime\TypedElementFramework\Public\Elements\Framework\TypedElementList.h:288]
UnrealEditor_UnrealEd!UUnrealEdEngine::UpdatePivotLocationForSelection() [D:\build\++UE5\Sync\Engine\Source\Editor\UnrealEd\Private\EditorSelectUtils.cpp:347]
UnrealEditor_UnrealEd!UUnrealEdEngine::NoteSelectionChange() [D:\build\++UE5\Sync\Engine\Source\Editor\UnrealEd\Private\EditorSelectUtils.cpp:397]
UnrealEditor_UnrealEd!TBaseUObjectMethodDelegateInstance<0,UUnrealEdEngine,void __cdecl(UTypedElementSelectionSet const *),FDefaultDelegateUserPolicy>::ExecuteIfSafe() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:618]
UnrealEditor_TypedElementRuntime!TMulticastDelegate<void __cdecl(UTypedElementSelectionSet const *),FDefaultDelegateUserPolicy>::Broadcast() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateSignatureImpl.inl:975]
UnrealEditor_TypedElementRuntime!UTypedElementSelectionSet::OnElementListChanged() [D:\build\++UE5\Sync\Engine\Source\Runtime\TypedElementRuntime\Private\Elements\Framework\TypedElementSelectionSet.cpp:576]
UnrealEditor_TypedElementRuntime!TBaseUObjectMethodDelegateInstance<0,UTypedElementSelectionSet,void __cdecl(TTypedElementList<FTypedElementHandle> const &),FDefaultDelegateUserPolicy>::ExecuteIfSafe() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:618]
UnrealEditor_TypedElementFramework!TMulticastDelegate<void __cdecl(TTypedElementList<FTypedElementHandle> const &),FDefaultDelegateUserPolicy>::Broadcast() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateSignatureImpl.inl:975]
UnrealEditor_TypedElementFramework!TTypedElementList<FTypedElementHandle>::NotifyPendingChanges() [D:\build\++UE5\Sync\Engine\Source\Runtime\TypedElementFramework\Private\Elements\Framework\TypedElementList.cpp:427]
UnrealEditor_UnrealEd!LevelViewportClickHandlers::ClickElement() [D:\build\++UE5\Sync\Engine\Source\Editor\UnrealEd\Private\LevelViewportClickHandlers.cpp:195]
UnrealEditor_UnrealEd!FLevelEditorViewportClient::ProcessClick() [D:\build\++UE5\Sync\Engine\Source\Editor\UnrealEd\Private\LevelEditorViewport.cpp:2369]
UnrealEditor_UnrealEd!FEditorViewportClient::ProcessClickInViewport() [D:\build\++UE5\Sync\Engine\Source\Editor\UnrealEd\Private\EditorViewportClient.cpp:3178]
UnrealEditor_UnrealEd!FEditorViewportClient::Internal_InputKey() [D:\build\++UE5\Sync\Engine\Source\Editor\UnrealEd\Private\EditorViewportClient.cpp:2964]
UnrealEditor_UnrealEd!FLevelEditorViewportClient::InputKey() [D:\build\++UE5\Sync\Engine\Source\Editor\UnrealEd\Private\LevelEditorViewport.cpp:3041]
UnrealEditor_Engine!FSceneViewport::OnMouseButtonUp() [D:\build\++UE5\Sync\Engine\Source\Runtime\Engine\Private\Slate\SceneViewport.cpp:643]
UnrealEditor_Slate!SViewport::OnMouseButtonUp() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Private\Widgets\SViewport.cpp:246]
UnrealEditor_Slate!<lambda_51e270ca99ea7ce852539efd04dd453f>::operator()() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:5046]
UnrealEditor_Slate!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_51e270ca99ea7ce852539efd04dd453f> >() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:412]
UnrealEditor_Slate!FSlateApplication::RoutePointerUpEvent() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:5032]
UnrealEditor_Slate!FSlateApplication::ProcessMouseButtonUpEvent() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:5601]
UnrealEditor_Slate!FSlateApplication::OnMouseUp() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:5566]
UnrealEditor_ApplicationCore!FWindowsApplication::ProcessDeferredMessage() [D:\build\++UE5\Sync\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsApplication.cpp:2219]
UnrealEditor_ApplicationCore!FWindowsApplication::DeferMessage() [D:\build\++UE5\Sync\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsApplication.cpp:2726]
UnrealEditor_ApplicationCore!FWindowsApplication::ProcessMessage() [D:\build\++UE5\Sync\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsApplication.cpp:1895]
UnrealEditor_ApplicationCore!FWindowsApplication::AppWndProc() [D:\build\++UE5\Sync\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsApplication.cpp:925]
user32
user32
InkObj
atlthunk
user32
user32
UnrealEditor_ApplicationCore!FWindowsPlatformApplicationMisc::PumpMessages() [D:\build\++UE5\Sync\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsPlatformApplicationMisc.cpp:142]
UnrealEditor!FEngineLoop::Tick() [D:\build\++UE5\Sync\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:5293]
UnrealEditor!GuardedMain() [D:\build\++UE5\Sync\Engine\Source\Runtime\Launch\Private\Launch.cpp:202]
UnrealEditor!GuardedMainWrapper() [D:\build\++UE5\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:107]
UnrealEditor!LaunchWindowsStartup() [D:\build\++UE5\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:244]
UnrealEditor!WinMain() [D:\build\++UE5\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:282]
UnrealEditor!__scrt_common_main_seh() [D:\a\_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288]
kernel32
ntdll

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Fixed

Component	UE - Editor - Workflow Systems
Affects Versions	5.1.1, 5.2
Target Fix	5.4

Fix Commit	25689444
Main Commit	26000790

Created	Mar 30, 2023
Resolved	May 30, 2023
Updated	Jan 20, 2024

View Jira Issue

UE-181821

Crash when interacting with an Actor containing an Instanced Static Mesh that is in a Locked level

Crash when interacting with an Actor containing an Instanced Static Mesh that is in a Locked level

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