Description

Add Point node used with an InputKey of 0 or 1 will crash the editor on bp compile

User Description:

Unreal version 4.14 crashes every time that you use spline component and try to add the point 0 or 1 before clear all spline points.

If you save the blueprint before compiling, after the crash, you will not be able to open our project because of that blueprint.

Steps to Reproduce

1. Open a new blank project
2. Create a new actor class blueprint & open it (see screenshot #1)
3. In the Construction Script > Add a AddSplineComponent node
4. Drag off the ReturnValue point > Add an AddPoint node
5. Drag off the Point pin > Add a MakeSplinePoint node
6. Compile the bp

Results: The editor will crash

Expected: For the bp to compile without error or give a warning as to why it cannot be compiled

Callstack
UE4Editor_Engine!USplineComponent::UpdateSpline() [splinecomponent.cpp:148]
UE4Editor_Engine!USplineComponent::AddPoint() [splinecomponent.cpp:573]
UE4Editor_Engine!USplineComponent::execAddPoint() [splinecomponent.h:128]
UE4Editor_CoreUObject!UFunction::Invoke() [class.cpp:4471]
UE4Editor_CoreUObject!UObject::CallFunction() [scriptcore.cpp:700]
UE4Editor_CoreUObject!UObject::ProcessContextOpcode() [scriptcore.cpp:2139]
UE4Editor_CoreUObject!UObject::ProcessInternal() [scriptcore.cpp:925]
UE4Editor_CoreUObject!UFunction::Invoke() [class.cpp:4471]
UE4Editor_CoreUObject!UObject::ProcessEvent() [scriptcore.cpp:1308]
UE4Editor_Engine!AActor::ProcessEvent() [actor.cpp:649]
UE4Editor_Engine!AActor::ProcessUserConstructionScript() [actorconstruction.cpp:817]
UE4Editor_Engine!AActor::ExecuteConstruction() [actorconstruction.cpp:733]
UE4Editor_UnrealEd!FActorReplacementHelper::Finalize() [kismetreinstanceutilities.cpp:1195]
UE4Editor_UnrealEd!FBlueprintCompileReinstancer::ReplaceInstancesOfClass_Inner() [kismetreinstanceutilities.cpp:1940]
UE4Editor_UnrealEd!FBlueprintCompileReinstancer::ReplaceInstancesOfClass() [kismetreinstanceutilities.cpp:1464]
UE4Editor_UnrealEd!FBlueprintCompileReinstancer::ReinstanceInner() [kismetreinstanceutilities.cpp:670]
UE4Editor_UnrealEd!FBlueprintCompileReinstancer::ReinstanceObjects() [kismetreinstanceutilities.cpp:901]
UE4Editor_UnrealEd!FKismetEditorUtilities::CompileBlueprint() [kismet2.cpp:825]
UE4Editor_Kismet!FBlueprintEditor::Compile() [blueprinteditor.cpp:3202]
UE4Editor_Kismet!TBaseSPMethodDelegateInstance<0,FBlueprintEditor,0,TTypeWrapper<void> __cdecl() [delegateinstancesimpl.h:318]
UE4Editor_Kismet!TBaseSPMethodDelegateInstance<0,FBlueprintEditor,0,void __cdecl() [delegateinstancesimpl.h:424]
UE4Editor_Slate!FUICommandList::ExecuteAction() [uicommandlist.cpp:92]
UE4Editor_Slate!SToolBarButtonBlock::OnClicked() [stoolbarbuttonblock.cpp:300]
UE4Editor_Slate!TMemberFunctionCaller<SToolBarButtonBlock,FReply() [delegateinstanceinterface.h:161]
UE4Editor_Slate!TTupleImpl<TIntegerSequence<unsigned int> >::ApplyAfter<TMemberFunctionCaller<SToolBarButtonBlock,FReply() [tuple.h:116]
UE4Editor_Slate!TBaseSPMethodDelegateInstance<0,SToolBarButtonBlock,0,FReply __cdecl() [delegateinstancesimpl.h:318]
UE4Editor_Slate!TBaseDelegate<FReply>::Execute() [delegatesignatureimpl.inl:522]
UE4Editor_Slate!SButton::OnMouseButtonUp() [sbutton.cpp:275]
UE4Editor_Slate!<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1>::operator() [slateapplication.cpp:5010]
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1> >() [slateapplication.cpp:215]
UE4Editor_Slate!FSlateApplication::RoutePointerUpEvent() [slateapplication.cpp:4999]
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonUpEvent() [slateapplication.cpp:5462]
UE4Editor_Slate!FSlateApplication::OnMouseUp() [slateapplication.cpp:5439]
UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() [windowsapplication.cpp:1652]
UE4Editor_Core!FWindowsApplication::DeferMessage() [windowsapplication.cpp:2071]
UE4Editor_Core!FWindowsApplication::ProcessMessage() [windowsapplication.cpp:814]
UE4Editor_Core!FWindowsApplication::AppWndProc() [windowsapplication.cpp:678]
user32!<Unknown>
user32!<Unknown>
UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() [windowsplatformmisc.cpp:951]
UE4Editor!FEngineLoop::Tick() [launchengineloop.cpp:2811]
UE4Editor!GuardedMain() [launch.cpp:152]
UE4Editor!GuardedMainWrapper() [launchwindows.cpp:126]
UE4Editor!WinMain() [launchwindows.cpp:202]
UE4Editor!__scrt_common_main_seh() [exe_common.inl:264]
kernel32!<Unknown>
ntdll!<Unknown>

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Unresolved
ComponentTools
Affects Versions4.134.144.15
CreatedNov 29, 2016
UpdatedMar 8, 2018