Description

An access violation occurs in FNiagaraSkeletalMeshRegionBoneFilterDetails::HandleBoneNameComboBoxSelectionChanged() due to StringItem is nullptr.

SkeletalMeshRegionCustomization.cpp
void FNiagaraSkeletalMeshRegionBoneFilterDetails::HandleBoneNameComboBoxSelectionChanged(TSharedPtr<FName> StringItem, ESelectInfo::Type SelectInfo)
{
	BoneNameHandle->SetValue(*StringItem);
}
 

The workaround is to close and reopen the Skeletal Mesh Editor.

Steps to Reproduce
  1. Create a new project using the Third Person Template.
  2. Open /Game/Characters/Mannequins/Meshes/SKM_Manny.
  3. Add an element in Sampling > Regions.
  4. Add an element to BoneFilters in Regions index [0].
  5. Set any bone (e.g., head) in BoneName of BoneFilters index [0].
  6. Attempt to change the BoneName again, causing a crash.
Callstack

 

Assertion failed: IsValid() [File:D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Templates\SharedPointer.h] [Line: 1102]
UnrealEditor_Persona!FNiagaraSkeletalMeshRegionBoneFilterDetails::HandleBoneNameComboBoxSelectionChanged() [D:\build\++UE5\Sync\Engine\Source\Editor\Persona\Private\Customization\SkeletalMeshRegionCustomization.cpp:104]
UnrealEditor_Persona!V::TBaseSPMethodDelegateInstance::ExecuteIfSafe() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:298]
UnrealEditor_Persona!TDelegate<void __cdecl(TSharedPtr<FName,1>,ESelectInfo::Type),FDefaultDelegateUserPolicy>::ExecuteIfBound<void,0>() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateSignatureImpl.inl:570]
UnrealEditor_Persona!SComboBox<TSharedPtr<FName,1> >::OnSelectionChanged_Internal() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Public\Widgets\Input\SComboBox.h:617]
UnrealEditor_Persona!V::TBaseSPMethodDelegateInstance::ExecuteIfSafe() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:298]
UnrealEditor_Persona!TDelegate<void __cdecl(TSharedPtr<FName,1>,ESelectInfo::Type),FDefaultDelegateUserPolicy>::ExecuteIfBound<void,0>() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateSignatureImpl.inl:570]
UnrealEditor_Persona!SListView<TSharedPtr<FName,1> >::Private_SignalSelectionChanged() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Public\Widgets\Views\SListView.h:997]
UnrealEditor_Persona!SListView<TSharedPtr<FName,1> >::UpdateSelectionSet() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Public\Widgets\Views\SListView.h:1343]
UnrealEditor_Slate!STableViewBase::Tick() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Private\Widgets\Views\STableViewBase.cpp:337]
UnrealEditor_SlateCore!SWidget::Paint() [D:\build\++UE5\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1483]
UnrealEditor_Slate!SBox::OnPaint() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Private\Widgets\Layout\SBox.cpp:305]
UnrealEditor_SlateCore!SWidget::Paint() [D:\build\++UE5\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1622]
UnrealEditor_SlateCore!SCompoundWidget::OnPaint() [D:\build\++UE5\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SCompoundWidget.cpp:46]
UnrealEditor_Slate!SBorder::OnPaint() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Private\Widgets\Layout\SBorder.cpp:129]
UnrealEditor_SlateCore!SWidget::Paint() [D:\build\++UE5\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1622]
UnrealEditor_SlateCore!FSlateWindowElementList::FDeferredPaint::ExecutePaint() [D:\build\++UE5\Sync\Engine\Source\Runtime\SlateCore\Private\Rendering\DrawElements.cpp:122]
UnrealEditor_SlateCore!FSlateWindowElementList::PaintDeferred() [D:\build\++UE5\Sync\Engine\Source\Runtime\SlateCore\Private\Rendering\DrawElements.cpp:147]
UnrealEditor_SlateCore!SWindow::PaintWindow() [D:\build\++UE5\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWindow.cpp:2126]
UnrealEditor_Slate!FSlateApplication::DrawWindowAndChildren() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:1159]
UnrealEditor_Slate!FSlateApplication::DrawWindowAndChildren() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:1211]
UnrealEditor_Slate!FSlateApplication::DrawWindowAndChildren() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:1211]
UnrealEditor_Slate!FSlateApplication::PrivateDrawWindows() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:1394]
UnrealEditor_Slate!FSlateApplication::DrawWindows() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:1103]
UnrealEditor_Slate!FSlateApplication::TickAndDrawWidgets() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:1698]
UnrealEditor_Slate!FSlateApplication::Tick() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:1549]
UnrealEditor!FEngineLoop::Tick() [D:\build\++UE5\Sync\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:6047]
UnrealEditor!GuardedMain() [D:\build\++UE5\Sync\Engine\Source\Runtime\Launch\Private\Launch.cpp:180]
UnrealEditor!GuardedMainWrapper() [D:\build\++UE5\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:118]
UnrealEditor!LaunchWindowsStartup() [D:\build\++UE5\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:258]
UnrealEditor!WinMain() [D:\build\++UE5\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:298]
UnrealEditor!__scrt_common_main_seh() [D:\a\_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288]
kernel32
ntdll

 

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Unresolved
ComponentUE - Anim
Affects Versions5.4
CreatedJun 14, 2024
UpdatedJun 17, 2024
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