Unreal Engine Issues and Bug Tracker (UE-148539)

Description

Activating a Sequencer based Camera Shake repetitively results in an assertion being thrown.

Assertion failed: DestAllocationIndex != SourceAllocationIndex [File:D:\build\++UE5\Sync\Engine\Source\Runtime\MovieScene\Private\EntitySystem\MovieSceneEntityManager.cpp] [Line: 1970]

Steps to Reproduce

Create a Third Person project
Create a new Blueprint derived from CameraShakeBase that uses Sequencer Camera Shake
1. Right Click in the content browser then select Blueprint Class
2. Expand All Classes then search for and select CameraShakeBase
3. Name it 'BP_CamShake'
4. In the Detail panel set the 'Root Shake Pattern' to 'Sequence Camera Shake Pattern'
5. Set the Play Rate to 1.0
6. Select the Sequence drop down then select 'Camera Animation Sequence' under Create New Asset, pick a name, and save.
7. Compile, save, and close BP_CamShake
Open the Sequencer asset we just created
Expand the Transform and Rotation key the Roll at 30.0
Scrub forward then key the Roll at 0 and save the sequence
Open BP_ThirdPersonCharacter
In the Event Graph assign a key press of P to trigger Start Camera shake using BP_CamShake targeting the Player Camera Manager
1. In the Event Graph right click then search Keyboard P and create a 'P' node
2. Off the 'P' node create a 'Start Camera Shake' node
3. Assign 'Get Player Camera Manager' to Target
4. Set Shake Class to 'BP_CamShake'
5. Compile, save, and close the Blueprint
Play in Editor
Press 'P' repetitively ~40 times

Expected Results:
Camera continues to shake without resetting

Actual Results:
Editor Crashes with an assertion

Callstack

Assertion failed: DestAllocationIndex != SourceAllocationIndex [File:D:\build\++UE5\Sync\Engine\Source\Runtime\MovieScene\Private\EntitySystem\MovieSceneEntityManager.cpp] [Line: 1970]

UnrealEditor_MovieScene!UE::MovieScene::FEntityManager::MigrateEntity() [D:\build\++UE5\Sync\Engine\Source\Runtime\MovieScene\Private\EntitySystem\MovieSceneEntityManager.cpp:1970]
UnrealEditor_MovieScene!UE::MovieScene::FEntityManager::AddComponents() [D:\build\++UE5\Sync\Engine\Source\Runtime\MovieScene\Private\EntitySystem\MovieSceneEntityManager.cpp:1164]
UnrealEditor_MovieScene!UE::MovieScene::FEntityLedger::UnlinkEverything() [D:\build\++UE5\Sync\Engine\Source\Runtime\MovieScene\Private\EntitySystem\MovieSceneEntityLedger.cpp:188]
UnrealEditor_MovieScene!UE::MovieScene::FSequenceInstance::DestroyImmediately() [D:\build\++UE5\Sync\Engine\Source\Runtime\MovieScene\Private\EntitySystem\MovieSceneSequenceInstance.cpp:289]
UnrealEditor_MovieScene!UE::MovieScene::FInstanceRegistry::DestroyInstance() [D:\build\++UE5\Sync\Engine\Source\Runtime\MovieScene\Private\EntitySystem\MovieSceneInstanceRegistry.cpp:106]
UnrealEditor_MovieScene!FMovieSceneRootEvaluationTemplateInstance::Initialize() [D:\build\++UE5\Sync\Engine\Source\Runtime\MovieScene\Private\Evaluation\MovieSceneEvaluationTemplateInstance.cpp:124]
UnrealEditor_TemplateSequence!USequenceCameraShakePattern::StartShakePatternImpl() [D:\build\++UE5\Sync\Engine\Plugins\MovieScene\TemplateSequence\Source\TemplateSequence\Private\SequenceCameraShake.cpp:83]
UnrealEditor_Engine!UCameraShakeBase::StartShake() [D:\build\++UE5\Sync\Engine\Source\Runtime\Engine\Private\Camera\CameraShakeBase.cpp:222]
UnrealEditor_Engine!UCameraModifier_CameraShake::AddCameraShake() [D:\build\++UE5\Sync\Engine\Source\Runtime\Engine\Private\Camera\CameraModifier_CameraShake.cpp:166]
UnrealEditor_Engine!APlayerCameraManager::StartCameraShake() [D:\build\++UE5\Sync\Engine\Source\Runtime\Engine\Private\PlayerCameraManager.cpp:1400]
UnrealEditor_Engine!APlayerCameraManager::execStartCameraShake() [D:\build\++UE5\Sync\Engine\Intermediate\Build\Win64\UnrealEditor\Inc\Engine\PlayerCameraManager.gen.cpp:612]
UnrealEditor_CoreUObject!UFunction::Invoke() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\Class.cpp:5912]
UnrealEditor_CoreUObject!UObject::CallFunction() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\ScriptCore.cpp:1012]
UnrealEditor_CoreUObject!UObject::ProcessContextOpcode() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\ScriptCore.cpp:2871]
UnrealEditor_CoreUObject!UObject::execLetObj() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\ScriptCore.cpp:2692]
UnrealEditor_CoreUObject!ProcessLocalScriptFunction() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\ScriptCore.cpp:1082]
UnrealEditor_CoreUObject!ProcessScriptFunction<void (__cdecl*)(UObject *,FFrame &,void *)>() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\ScriptCore.cpp:912]
UnrealEditor_CoreUObject!ProcessLocalFunction() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\ScriptCore.cpp:1143]
UnrealEditor_CoreUObject!ProcessLocalScriptFunction() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\ScriptCore.cpp:1082]
UnrealEditor_CoreUObject!UObject::ProcessInternal() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\ScriptCore.cpp:1170]
UnrealEditor_CoreUObject!UFunction::Invoke() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\Class.cpp:5912]
UnrealEditor_CoreUObject!UObject::ProcessEvent() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\ScriptCore.cpp:2003]
UnrealEditor_Engine!AActor::ProcessEvent() [D:\build\++UE5\Sync\Engine\Source\Runtime\Engine\Private\Actor.cpp:1030]
UnrealEditor_Engine!FInputActionUnifiedDelegate::Execute() [D:\build\++UE5\Sync\Engine\Source\Runtime\Engine\Classes\Components\InputComponent.h:302]
UnrealEditor_Engine!UPlayerInput::ProcessInputStack() [D:\build\++UE5\Sync\Engine\Source\Runtime\Engine\Private\UserInterface\PlayerInput.cpp:1419]
UnrealEditor_Engine!APlayerController::ProcessPlayerInput() [D:\build\++UE5\Sync\Engine\Source\Runtime\Engine\Private\PlayerController.cpp:2609]
UnrealEditor_Engine!APlayerController::TickPlayerInput() [D:\build\++UE5\Sync\Engine\Source\Runtime\Engine\Private\PlayerController.cpp:4762]
UnrealEditor_Engine!APlayerController::PlayerTick() [D:\build\++UE5\Sync\Engine\Source\Runtime\Engine\Private\PlayerController.cpp:2234]
UnrealEditor_Engine!APlayerController::TickActor() [D:\build\++UE5\Sync\Engine\Source\Runtime\Engine\Private\PlayerController.cpp:4914]
UnrealEditor_Engine!FActorTickFunction::ExecuteTick() [D:\build\++UE5\Sync\Engine\Source\Runtime\Engine\Private\Actor.cpp:197]
UnrealEditor_Engine!FTickFunctionTask::DoTask() [D:\build\++UE5\Sync\Engine\Source\Runtime\Engine\Private\TickTaskManager.cpp:284]
UnrealEditor_Engine!TGraphTask<FTickFunctionTask>::ExecuteTask() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Async\TaskGraphInterfaces.h:975]
UnrealEditor_Core!FNamedTaskThread::ProcessTasksNamedThread() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Private\Async\TaskGraph.cpp:753]
UnrealEditor_Core!FNamedTaskThread::ProcessTasksUntilQuit() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Private\Async\TaskGraph.cpp:642]
UnrealEditor_Core!FTaskGraphCompatibilityImplementation::WaitUntilTasksComplete() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Private\Async\TaskGraph.cpp:2169]
UnrealEditor_Engine!FTickTaskSequencer::ReleaseTickGroup() [D:\build\++UE5\Sync\Engine\Source\Runtime\Engine\Private\TickTaskManager.cpp:565]
UnrealEditor_Engine!FTickTaskManager::RunTickGroup() [D:\build\++UE5\Sync\Engine\Source\Runtime\Engine\Private\TickTaskManager.cpp:1592]
UnrealEditor_Engine!UWorld::RunTickGroup() [D:\build\++UE5\Sync\Engine\Source\Runtime\Engine\Private\LevelTick.cpp:790]
UnrealEditor_Engine!UWorld::Tick() [D:\build\++UE5\Sync\Engine\Source\Runtime\Engine\Private\LevelTick.cpp:1531]
UnrealEditor_UnrealEd!UEditorEngine::Tick() [D:\build\++UE5\Sync\Engine\Source\Editor\UnrealEd\Private\EditorEngine.cpp:1777]
UnrealEditor_UnrealEd!UUnrealEdEngine::Tick() [D:\build\++UE5\Sync\Engine\Source\Editor\UnrealEd\Private\UnrealEdEngine.cpp:474]
UnrealEditor!FEngineLoop::Tick() [D:\build\++UE5\Sync\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:5215]
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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Fixed

Component	UE - Anim - Sequencer
Affects Versions	5.0
Target Fix	5.1

Fix Commit	20662639

Created	Apr 7, 2022
Resolved	Jun 17, 2022
Updated	Jun 20, 2022

View Jira Issue

UE-148539

Sequencer based Camera Shake throws an assertion when spammed

Sequencer based Camera Shake throws an assertion when spammed

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