Weird UE4 crash

Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:/Users/build/Build/++UE4/Sync/Engine/Source/Runtime/Core/Public/Containers/Array.h] [Line: 611]

FGenericPlatformMisc::RaiseException(unsigned int) Address = 0x10117f30b (filename not found) [in UE4Editor-Core.dylib]
FMacErrorOutputDevice::Serialize(wchar_t const*, ELogVerbosity::Type, FName const&) Address = 0x1012bf82d (filename not found) [in UE4Editor-Core.dylib]
FOutputDevice::LogfImpl(wchar_t const*, ...) Address = 0x101393019 (filename not found) [in UE4Editor-Core.dylib]
FDebug::AssertFailed(char const*, char const*, int, wchar_t const*, ...) Address = 0x101327a53 (filename not found) [in UE4Editor-Core.dylib]
FDebug::CheckVerifyFailedImpl(char const*, char const*, int, wchar_t const*, ...) Address = 0x101327867 (filename not found) [in UE4Editor-Core.dylib]
ULineBatchComponent::DrawLine(FVector const&, FVector const&, FLinearColor const&, unsigned char, float, float) Address = 0x104c53426 (filename not found) [in UE4Editor-Engine.dylib]
DrawDebugLine(UWorld const*, FVector const&, FVector const&, FColor const&, bool, float, unsigned char, float) Address = 0x104e61550 (filename not found) [in UE4Editor-Engine.dylib]
DrawDebugLineTraceSingle(UWorld const*, FVector const&, FVector const&, EDrawDebugTrace::Type, bool, FHitResult const&, FLinearColor, FLinearColor, float) Address = 0x105077cf5 (filename not found) [in UE4Editor-Engine.dylib]
UKismetSystemLibrary::LineTraceSingle(UObject*, FVector, FVector, ETraceTypeQuery, bool, TArray<AActor*, FDefaultAllocator> const&, EDrawDebugTrace::Type, FHitResult&, bool, FLinearColor, FLinearColor, float) Address = 0x1050779bd (filename not found) [in UE4Editor-Engine.dylib]
FAnimNode_DragonSpineSolver::line_trace_func(USkeletalMeshComponent&, FVector, FVector, FHitResult, FName, FName, FHitResult&, FLinearColor, bool) Address = 0x16155c0f0 (filename not found) [in UE4Editor-DragonIKPlugin.dylib]
FAnimNode_DragonSpineSolver::UpdateInternal(FAnimationUpdateContext const&) Address = 0x161559798 (filename not found) [in UE4Editor-DragonIKPlugin.dylib]
FAnimNode_DragonSpineSolver::Update_AnyThread(FAnimationUpdateContext const&) Address = 0x161551f8a (filename not found) [in UE4Editor-DragonIKPlugin.dylib]
FPoseLinkBase::Update(FAnimationUpdateContext const&) Address = 0x1049aa59a (filename not found) [in UE4Editor-Engine.dylib]
FAnimNode_DragonFeetSolver::Update_AnyThread(FAnimationUpdateContext const&) Address = 0x16153e4f1 (filename not found) [in UE4Editor-DragonIKPlugin.dylib]
FPoseLinkBase::Update(FAnimationUpdateContext const&) Address = 0x1049aa59a (filename not found) [in UE4Editor-Engine.dylib]
FPoseLinkBase::Update(FAnimationUpdateContext const&) Address = 0x1049aa59a (filename not found) [in UE4Editor-Engine.dylib]
FAnimInstanceProxy::UpdateAnimationNode(float) Address = 0x104963d66 (filename not found) [in UE4Editor-Engine.dylib]
FAnimInstanceProxy::UpdateAnimation() Address = 0x10494f165 (filename not found) [in UE4Editor-Engine.dylib]
USkeletalMeshComponent::PerformAnimationProcessing(USkeletalMesh const*, UAnimInstance*, bool, TArray<FTransform, FDefaultAllocator>&, TArray<FTransform, FDefaultAllocator>&, FVector&, FBlendedHeapCurve&) Address = 0x104cd1976 (filename not found) [in UE4Editor-Engine.dylib]
USkeletalMeshComponent::ParallelAnimationEvaluation() Address = 0x104cd87d7 (filename not found) [in UE4Editor-Engine.dylib]
FParallelAnimationEvaluationTask::DoTask(ENamedThreads::Type, TRefCountPtr<FGraphEvent> const&) Address = 0x104cfd4a2 (filename not found) [in UE4Editor-Engine.dylib]
TGraphTask<FParallelAnimationEvaluationTask>::ExecuteTask(TArray<FBaseGraphTask*, FDefaultAllocator>&, ENamedThreads::Type) Address = 0x104cfcc43 (filename not found) [in UE4Editor-Engine.dylib]
FTaskThreadAnyThread::ProcessTasks() Address = 0x101143cf3 (filename not found) [in UE4Editor-Core.dylib]
FTaskThreadAnyThread::ProcessTasksUntilQuit(int) Address = 0x1011430f8 (filename not found) [in UE4Editor-Core.dylib]
FTaskThreadAnyThread::Run() Address = 0x101142fcd (filename not found) [in UE4Editor-Core.dylib]
FRunnableThreadPThread::Run() Address = 0x1011de5a8 (filename not found) [in UE4Editor-Core.dylib]
FRunnableThreadPThread::_ThreadProc(void*) Address = 0x1011ba521 (filename not found) [in UE4Editor-Core.dylib]
_pthread_body Address = 0x7fff717df2eb (filename not found) [in libsystem_pthread.dylib]
_pthread_start Address = 0x7fff717e2249 (filename not found) [in libsystem_pthread.dylib]
thread_start Address = 0x7fff717de40d (filename not found) [in libsystem_pthread.dylib]