Unreal Engine Issues and Bug Tracker (UE-148411)

Description

Adding a parameter of type structure bp which references an enum as a value to a module script crashes the engine. This issue is also occurring in 4.27.

Steps to Reproduce

Create an Enumeration BP, open it and add several members, name it MyEnum
Create a Structure BP, name it MyStruct , open it and add MyEnum as a value
Go to Project Settings > Plugins > Niagara > add an additional parameter enum and select MyEnum as the value.
Add MyStruct as the value for Additional Parameter and Payload Types
Create a Niagara System, open it, and add a new user parameter of type MyStruct
Create a Niagara Module Script, open it, right click on the Node graph and add a parameter of type MyStruct

Actual Result: Engine crashes as soon as the user attempts to add the structure parameter referencing the first enumeration bp.
Expected Result: Parameter type structure is added successfully in Niagara Module Script

Callstack

Assertion failed: 0 [File:D:\build\++UE5\Sync\Engine\Plugins\FX\Niagara\Source\NiagaraEditor\Private\EdGraphSchema_Niagara.cpp] [Line: 1878]

UnrealEditor-NiagaraEditor!UEdGraphSchema_Niagara::GetTypeDefForProperty(FProperty const *) [EdGraphSchema_Niagara.cpp:1878]
UnrealEditor-NiagaraEditor!UNiagaraNodeConvert::AutowireNewNode(UEdGraphPin *) [NiagaraNodeConvert.cpp:570]
UnrealEditor-NiagaraEditor!FNiagaraAction_NewNode::CreateNode(UEdGraph *,UEdGraphPin *,UE::Math::TVector2<double>,bool) [NiagaraActions.cpp:262]
UnrealEditor-NiagaraEditor!FNiagaraAction_NewNode::CreateNode(UEdGraph *,TArray<UEdGraphPin *,TSizedDefaultAllocator<32> > &,UE::Math::TVector2<double>,bool) [NiagaraActions.cpp:311]
UnrealEditor-NiagaraEditor!SNiagaraGraphActionMenu::OnItemActivated(TSharedPtr<FNiagaraAction_NewNode,1> const &) [SNiagaraGraphActionMenu.cpp:192]
UnrealEditor-NiagaraEditor!void TBaseSPMethodDelegateInstance<0,SNiagaraGraphActionMenu,1,void __cdecl(TSharedPtr<FNiagaraAction_NewNode,1> const &) [DelegateInstancesImpl.h:290]
UnrealEditor-NiagaraEditor!SItemSelector<FString,TSharedPtr<FNiagaraAction_NewNode,1>,ENiagaraMenuSections,unsigned int,unsigned int,unsigned int>::OnMouseClick(TSharedRef<SItemSelector<FString,TSharedPtr<FNiagaraAction_NewNode,1>,ENiagaraMenuSections,unsigned int,unsigned int,unsigned int>::FItemSelectorItemViewModel,1>) [SItemSelector.h:2038]
UnrealEditor-NiagaraEditor!TBaseSPMethodDelegateInstance<0,SItemSelector<FString,TSharedPtr<FNiagaraAction_NewNode,1>,ENiagaraMenuSections,unsigned int,unsigned int,unsigned int>,1,void ,FDefaultDelegateUserPolicy>::ExecuteIfSafe(TSharedRef<SItemSelector<FString,TSharedPtr<FNiagaraAction_NewNode,1>,ENiagaraMenuSections,unsigned int,unsigned int,unsigned int>::FItemSelectorItemViewModel,1>) [DelegateInstancesImpl.h:307]
UnrealEditor-NiagaraEditor!TDelegate<void ,FDefaultDelegateUserPolicy>::ExecuteIfBound<void,0>(TSharedRef<SItemSelector<FString,TSharedPtr<FNiagaraAction_NewNode,1>,ENiagaraMenuSections,unsigned int,unsigned int,unsigned int>::FItemSelectorItemViewModel,1>) [DelegateSignatureImpl.inl:607]
UnrealEditor-NiagaraEditor!SListView<TSharedRef<SItemSelector<FString,TSharedPtr<FNiagaraAction_NewNode,1>,ENiagaraMenuSections,unsigned int,unsigned int,unsigned int>::FItemSelectorItemViewModel,1> >::Private_OnItemClicked(TSharedRef<SItemSelector<FString,TSharedPtr<FNiagaraAction_NewNode,1>,ENiagaraMenuSections,unsigned int,unsigned int,unsigned int>::FItemSelectorItemViewModel,1>) [SListView.h:1077]
UnrealEditor-NiagaraEditor!STableRow<TSharedRef<SItemSelector<FString,TSharedPtr<FNiagaraAction_NewNode,1>,ENiagaraMenuSections,unsigned int,unsigned int,unsigned int>::FItemSelectorItemViewModel,1> >::OnMouseButtonUp(FGeometry const &,FPointerEvent const &) [STableRow.h:546]
UnrealEditor-Slate!7ffa2ef80000  + 34034
UnrealEditor-Slate!7ffa2ef80000  + 16fc6
UnrealEditor-Slate!7ffa2ef80000  + 902de
UnrealEditor-Slate!7ffa2ef80000  + 791b1
UnrealEditor-Slate!7ffa2ef80000  + 6d5dc
UnrealEditor-ApplicationCore!FWindowsApplication::ProcessDeferredMessage(FDeferredWindowsMessage const &) [WindowsApplication.cpp:2210]
UnrealEditor-ApplicationCore!FWindowsApplication::DeferMessage(TSharedPtr<FWindowsWindow,1> &,HWND__ *,unsigned int,unsigned __int64,__int64,int,int,unsigned int) [WindowsApplication.cpp:2699]
UnrealEditor-ApplicationCore!FWindowsApplication::ProcessMessage(HWND__ *,unsigned int,unsigned __int64,__int64) [WindowsApplication.cpp:1078]
UnrealEditor-ApplicationCore!FWindowsApplication::AppWndProc(HWND__ *,unsigned int,unsigned __int64,__int64) [WindowsApplication.cpp:916]
USER32!7ffab4a80000  + e858
USER32!7ffab4a80000  + e299
UnrealEditor-ApplicationCore!FWindowsPlatformApplicationMisc::PumpMessages(bool) [WindowsPlatformApplicationMisc.cpp:138]
UnrealEditor!7ff703eb0000  + 7114
UnrealEditor!7ff703eb0000  + 20d9c
UnrealEditor!7ff703eb0000  + 20e8a
UnrealEditor!7ff703eb0000  + 23c4d
UnrealEditor!7ff703eb0000  + 35534
UnrealEditor!7ff703eb0000  + 386e6
KERNEL32!7ffab5740000  + 17034
ntdll!7ffab6630000  + 52651

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Cannot Reproduce

Component	UE - Niagara
Affects Versions	5.0

Created	Apr 6, 2022
Resolved	Jun 30, 2023
Updated	Jul 3, 2023

View Jira Issue

UE-148411

Adding a Structure BP parameter with a Enum BP as a member to a Niagara Module Script crashes the engine

Adding a Structure BP parameter with a Enum BP as a member to a Niagara Module Script crashes the engine

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