Animation System relies on FindFunctionByName which is not thread safe.

Currently, there are several places in FAnimInstanceProxy and FAnimNode_Base (and derived classes) that rely on FindFunctionByName in order to resolve transitions, evaluate pins, etc.

This can happen on worker threads, and can occasionally cause crashes.

FExposedValueHandler::Initialize (called in FAnimNode_Base::Initialize) is one example.

Might be worth looking for similar calls that may also be thread unsafe.

Code task entered as bug

UE4Editor-Core.dll!FDebug::AssertFailed() Line 332
UE4Editor-CoreUObject.dll!TSparseArray<TSetElement<TPair<FName,UFunction * __ptr64> >,TSparseArrayAllocator<FDefaultAllocator,FDefaultBitArrayAllocator> >::AllocateIndex() Line 70
UE4Editor-CoreUObject.dll!TSet<TPair<FName,UFunction * __ptr64>,TDefaultMapKeyFuncs<FName,UFunction * __ptr64,0>,FDefaultSetAllocator>::Emplace<TPairInitializer<FName const & __ptr64,UFunction * __ptr64 const & __ptr64> >() Line 484
UE4Editor-CoreUObject.dll!UClass::FindFunctionByName() Line 4107
UE4Editor-CoreUObject.dll!UObject::FindFunctionChecked() Line 1117
UE4Editor-CoreUObject.dll!UObject::execVirtualFunction() Line 2257
UE4Editor-CoreUObject.dll!UObject::ProcessInternal() Line 925
UE4Editor-CoreUObject.dll!UFunction::Invoke() Line 4477
UE4Editor-CoreUObject.dll!UObject::ProcessEvent() Line 1308
UE4Editor-Engine.dll!FExposedValueHandler::Execute() Line 520
UE4Editor-AnimGraphRuntime.dll!FAnimNode_BlendSpacePlayer::Initialize() Line 55
UE4Editor-Engine.dll!FPoseLinkBase::Initialize() Line 132
UE4Editor-Engine.dll!FPoseLinkBase::Initialize() Line 132
UE4Editor-Engine.dll!FAnimNode_StateMachine::SetState() Line 909
UE4Editor-Engine.dll!FAnimNode_StateMachine::Initialize() Line 265
UE4Editor-Engine.dll!FPoseLinkBase::Initialize() Line 132
UE4Editor-AnimGraphRuntime.dll!FAnimNode_ApplyAdditive::Initialize() Line 15
UE4Editor-Engine.dll!FPoseLinkBase::Initialize() Line 132
UE4Editor-AnimGraphRuntime.dll!FAnimNode_BlendListBase::Initialize() Line 25
UE4Editor-Engine.dll!FPoseLinkBase::Initialize() Line 132
UE4Editor-Engine.dll!FPoseLinkBase::Initialize() Line 132
UE4Editor-Engine.dll!FAnimNode_StateMachine::SetState() Line 909
UE4Editor-Engine.dll!FAnimNode_StateMachine::Update() Line 445
UE4Editor-Engine.dll!FPoseLinkBase::Update() Line 190
UE4Editor-Engine.dll!FAnimNode_SaveCachedPose::PostGraphUpdate() Line 96
UE4Editor-Engine.dll!FAnimInstanceProxy::UpdateAnimationNode() Line 40
UE4Editor-Engine.dll!FAnimInstanceProxy::UpdateAnimation() Line 762
UE4Editor-Engine.dll!USkeletalMeshComponent::PerformAnimationEvaluation() Line 1357
UE4Editor-Engine.dll!FParallelAnimationEvaluationTask::DoTask() Line 107
UE4Editor-Engine.dll!TGraphTask<FParallelAnimationEvaluationTask>::ExecuteTask(TArray<FBaseGraphTask *,FDefaultAllocator> & NewTasks, ENamedThreads::Type CurrentThread=6) Line 868
UE4Editor-Core.dll!FTaskThreadAnyThread::ProcessTasks() Line 1255
UE4Editor-Core.dll!FTaskThreadAnyThread::ProcessTasksUntilQuit(int QueueIndex) Line 1149
UE4Editor-Core.dll!FTaskThreadBase::Run() Line 621
UE4Editor-Core.dll!FRunnableThreadWin::Run() Line 74
UE4Editor-Core.dll!FRunnableThreadWin::GuardedRun() Line 31

Fix UE-51650

I am not able to find world outliner how to enable it?

Undefined sysmbol: typeinfo for AActor when cross-compile linux dedicated server on windows

Delay nodes occasionally don't fire the "Completed" output in a nativized build

Hey, why do i get this when i snap two similar meshes together?

When I open UE4 4.24.3 it appears that. Does anyone know how to solve?

Bonjour j'ai un petit problème c'est que je ne vois plus l'onglet "scability" pour changer les graphismes de uefn et j'ai pas trouvé l'option pour le faire revenir ?

How can i modify the param name in EQS node

Custom Depth issue fix target

I'm testing a vehicle demo for html5..when I packaging and testing it on chromium it won't show the object but a side of the object. What should be the issue?