Unreal Engine Issues and Bug Tracker (UE-43036)

Description

REGRESSION No

Crash occurs when the user right-clicks in the graph in a blueprint that has a Null parent class.

Steps to Reproduce

Open QAGame in editor.
Select Edit > Plugins
Disable PhysX Vehicles.
Restart QAGame editor.
In the Content Browser, find and open the Sedan blueprint (which is based on the now disabled WheeledVehicle class).
Click Yes on the warning message.
Right-click in the Event Graph.

RESULT
Crash

Callstack

UE4Editor_BlueprintGraph!UBlueprintVariableNodeSpawner::GetUiSpec() blueprintvariablenodespawner.cpp:182 
UE4Editor_Kismet!FBlueprintActionMenuItemFactory::GetActionUiSignature() blueprintactionmenubuilder.cpp:240 
UE4Editor_Kismet!FBlueprintActionMenuItemFactory::MakeActionMenuItem() blueprintactionmenubuilder.cpp:109 
UE4Editor_Kismet!FBlueprintActionMenuBuilderImpl::FMenuSectionDefinition::MakeMenuItems() blueprintactionmenubuilder.cpp:450 
UE4Editor_Kismet!FBlueprintActionMenuBuilder::RebuildActionList() blueprintactionmenubuilder.cpp:532 
UE4Editor_Kismet!FBlueprintActionMenuUtils::MakeContextMenu() blueprintactionmenuutils.cpp:686 
UE4Editor_Kismet!SBlueprintActionMenu::CollectAllActions() sblueprintactionmenu.cpp:455 
UE4Editor_Kismet!TBaseSPMethodDelegateInstance<0,SBlueprintActionMenu,0,TTypeWrapper<void> __cdecl() delegateinstancesimpl.h:327 
UE4Editor_Kismet!TBaseSPMethodDelegateInstance<0,SBlueprintActionMenu,0,void __cdecl() delegateinstancesimpl.h:434 
UE4Editor_GraphEditor!SGraphActionMenu::RefreshAllActions() sgraphactionmenu.cpp:351 
UE4Editor_GraphEditor!SGraphActionMenu::Construct() sgraphactionmenu.cpp:341 
UE4Editor_Kismet!TDecl<SGraphActionMenu,RequiredArgs::T0RequiredArgs>::operator<<=() declarativesyntaxsupport.h:1087 
UE4Editor_Kismet!SBlueprintActionMenu::Construct() sblueprintactionmenu.cpp:264 
UE4Editor_Kismet!TDecl<SBlueprintActionMenu,RequiredArgs::T1RequiredArgs<TSharedRef<FBlueprintEditor,0> && __ptr64> >::operator<<=() declarativesyntaxsupport.h:1087
UE4Editor_Kismet!FBlueprintEditor::OnCreateGraphActionMenu() blueprinteditor.cpp:3135 
UE4Editor_Kismet!TMemberFunctionCaller<FBlueprintEditor,FActionMenuContent() delegateinstanceinterface.h:165 
UE4Editor_Kismet!UE4Tuple_Private::TTupleImpl<TIntegerSequence<unsigned int> >::ApplyAfter<TMemberFunctionCaller<FBlueprintEditor,FActionMenuCont tuple.h:504
UE4Editor_Kismet!TBaseSPMethodDelegateInstance<0,FBlueprintEditor,0,FActionMenuContent __cdecl() delegateinstancesimpl.h:327 
UE4Editor_GraphEditor!TBaseDelegate<FActionMenuContent,UEdGraph * __ptr64,FVector2D const & __ptr64,TArray<UEdGraphPin * __ptr64,FDefaultAllocator> co delegatesignatureimpl.inl:537
UE4Editor_GraphEditor!SGraphEditorImpl::GraphEd_OnGetContextMenuFor() sgrapheditorimpl.cpp:509 
UE4Editor_GraphEditor!TMemberFunctionCaller<SGraphEditorImpl,FActionMenuContent() delegateinstanceinterface.h:165 
UE4Editor_GraphEditor!UE4Tuple_Private::TTupleImpl<TIntegerSequence<unsigned int> >::ApplyAfter<TMemberFunctionCaller<SGraphEditorImpl,FActionMenuCont tuple.h:504
UE4Editor_GraphEditor!TBaseSPMethodDelegateInstance<0,SGraphEditorImpl,0,FActionMenuContent __cdecl() delegateinstancesimpl.h:327 
UE4Editor_GraphEditor!TBaseDelegate<FActionMenuContent,FGraphContextMenuArguments const & __ptr64>::Execute() delegatesignatureimpl.inl:537 
UE4Editor_GraphEditor!SGraphPanel::SummonContextMenu() sgraphpanel.cpp:1035 
UE4Editor_GraphEditor!SGraphPanel::OnSummonContextMenu() sgraphpanel.cpp:761 
UE4Editor_GraphEditor!SNodePanel::OnMouseButtonUp() snodepanel.cpp:831 
UE4Editor_GraphEditor!SGraphPanel::OnMouseButtonUp() sgraphpanel.cpp:643 
UE4Editor_Slate!<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1>::operator() slateapplication.cpp:5016 
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1> >() slateapplication.cpp:239
UE4Editor_Slate!FSlateApplication::RoutePointerUpEvent() slateapplication.cpp:5005 
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonUpEvent() slateapplication.cpp:5472 
UE4Editor_Slate!FSlateApplication::OnMouseUp() slateapplication.cpp:5449 
UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() windowsapplication.cpp:1698 
UE4Editor_Core!FWindowsApplication::DeferMessage() windowsapplication.cpp:2120 
UE4Editor_Core!FWindowsApplication::ProcessMessage() windowsapplication.cpp:867 
UE4Editor_Core!FWindowsApplication::AppWndProc() windowsapplication.cpp:714 
user32!<Unknown> 
user32!<Unknown> 
UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() windowsplatformmisc.cpp:980 
UE4Editor!FEngineLoop::Tick() launchengineloop.cpp:3019 
UE4Editor!GuardedMain() launch.cpp:166 
UE4Editor!GuardedMainWrapper() launchwindows.cpp:134 
UE4Editor!WinMain() launchwindows.cpp:210 
UE4Editor!__scrt_common_main_seh() exe_common.inl:264 
kernel32!<Unknown> 
ntdll!<Unknown>

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Fixed

Component	UE - Gameplay - Blueprint
Affects Versions	4.16
Target Fix	4.16

Fix Commit	3377009
Main Commit	3380073

Created	Mar 17, 2017
Resolved	Apr 3, 2017
Updated	Apr 27, 2018

UE-43036

Crash occurs when right-clicking in graph of a blueprint with a null parent class

Crash occurs when right-clicking in graph of a blueprint with a null parent class

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