Crash when splitting up output of collapsed node

A crash occurs when splitting the pin of a collapsed vector node that was connected via a vector connection.

This issue is very similar to [Link Removed] however, the callstacks are different so I have made this a seperate issue

1. Create a new project (Blank, no starter content needed)
2. Create a new Actor Class BP
3. Open the BP and go to the event graph
4. Create a Make Vector Node (Right click the graph and type 'Make Vector')
5. Pull off the return value pin and add a vector length node
6. collapse the make vector node
7. Alt+Click on the collapsed nodes pin to disconnect it
8. Split the pin on the collapsed node
9. Compile the BP
   Expected: The blueprint compiles with no issue
   Results: The editor crashes

UE4Editor_Core!FDebug::AssertFailed() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:332]
UE4Editor_UnrealEd!FEdGraphToken::Create() [d:\build\++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\edgraphtoken.cpp:19]
UE4Editor_KismetCompiler!FCompilerResultsLog::Tokenize<UEdGraphPin const * __ptr64,UEdGraphNode * __ptr64,UEdGraphNode const * __ptr64>() [d:\build\++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\public\kismet2\compilerresultslog.h:252]
UE4Editor_KismetCompiler!FCompilerResultsLog::Error<UEdGraphPin const * __ptr64,UEdGraphNode * __ptr64,UEdGraphNode const * __ptr64>() [d:\build\++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\public\kismet2\compilerresultslog.h:149]
UE4Editor_KismetCompiler!FGraphCompilerContext::ValidateNode() [d:\build\++ue4+release-4.14+compile\sync\engine\source\editor\kismetcompiler\private\edgraphcompiler.cpp:72]
UE4Editor_KismetCompiler!FKismetCompilerContext::CreateAndProcessUbergraph() [d:\build\++ue4+release-4.14+compile\sync\engine\source\editor\kismetcompiler\private\kismetcompiler.cpp:2945]
UE4Editor_KismetCompiler!FKismetCompilerContext::CreateFunctionList() [d:\build\++ue4+release-4.14+compile\sync\engine\source\editor\kismetcompiler\private\kismetcompiler.cpp:3378]
UE4Editor_KismetCompiler!FKismetCompilerContext::Compile() [d:\build\++ue4+release-4.14+compile\sync\engine\source\editor\kismetcompiler\private\kismetcompiler.cpp:3632]
UE4Editor_KismetCompiler!FKismet2CompilerModule::CompileBlueprintInner() [d:\build\++ue4+release-4.14+compile\sync\engine\source\editor\kismetcompiler\private\kismetcompilermodule.cpp:100]
UE4Editor_KismetCompiler!FKismet2CompilerModule::CompileBlueprint() [d:\build\++ue4+release-4.14+compile\sync\engine\source\editor\kismetcompiler\private\kismetcompilermodule.cpp:216]
UE4Editor_UnrealEd!FKismetEditorUtilities::CompileBlueprint() [d:\build\++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\kismet2\kismet2.cpp:784]
UE4Editor_Kismet!FBlueprintEditor::Compile() [d:\build\++ue4+release-4.14+compile\sync\engine\source\editor\kismet\private\blueprinteditor.cpp:3202]
UE4Editor_Kismet!TBaseSPMethodDelegateInstance<0,FBlueprintEditor,0,TTypeWrapper<void> __cdecl(void)>::Execute() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:318]
UE4Editor_Kismet!TBaseSPMethodDelegateInstance<0,FBlueprintEditor,0,void __cdecl(void)>::ExecuteIfSafe() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:424]
UE4Editor_Slate!FUICommandList::ExecuteAction() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\slate\private\framework\commands\uicommandlist.cpp:92]
UE4Editor_Slate!SToolBarButtonBlock::OnClicked() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\slate\private\framework\multibox\stoolbarbuttonblock.cpp:300]
UE4Editor_Slate!TMemberFunctionCaller<SToolBarButtonBlock,FReply (__cdecl SToolBarButtonBlock::*)(void) __ptr64>::operator()<>() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\core\public\delegates\delegateinstanceinterface.h:161]
UE4Editor_Slate!TTupleImpl<TIntegerSequence<unsigned int> >::ApplyAfter<TMemberFunctionCaller<SToolBarButtonBlock,FReply (__cdecl SToolBarButtonBlock::*)(void) __ptr64> >() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\core\public\delegates\tuple.h:116]
UE4Editor_Slate!TBaseSPMethodDelegateInstance<0,SToolBarButtonBlock,0,FReply __cdecl(void)>::Execute() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:318]
UE4Editor_Slate!TBaseDelegate<FReply>::Execute() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\core\public\delegates\delegatesignatureimpl.inl:522]
UE4Editor_Slate!SButton::OnMouseButtonUp() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\slate\private\widgets\input\sbutton.cpp:275]
UE4Editor_Slate!<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1>::operator()() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5010]
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1> >() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:215]
UE4Editor_Slate!FSlateApplication::RoutePointerUpEvent() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4999]
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonUpEvent() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5462]
UE4Editor_Slate!FSlateApplication::OnMouseUp() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5439]
UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:1652]
UE4Editor_Core!FWindowsApplication::DeferMessage() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:2071]
UE4Editor_Core!FWindowsApplication::ProcessMessage() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:814]
UE4Editor_Core!FWindowsApplication::AppWndProc() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:678]
user32
user32
UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\core\private\windows\windowsplatformmisc.cpp:951]
UE4Editor!FEngineLoop::Tick() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\launch\private\launchengineloop.cpp:2811]
UE4Editor!GuardedMain() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\launch\private\launch.cpp:152]
UE4Editor!GuardedMainWrapper() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:202]
UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:264]
kernel32
ntdll