Renaming an emitter's name in Timeline panel of Niagara editor causes an editor crash. This happens because FViewModelHierarchyOperation constructor is called with null InAnyModel ptr;
FViewModelHierarchyOperation::FViewModelHierarchyOperation(const TSharedPtr<FViewModel>& InAnyModel)
: SharedData(InAnyModel->SharedData)
In this situation, the Track Model object hasn't received a valid shared data, so FTrackModel::ForceUpdate() called from OnDeferredModifyFlush causes a crash.
// This is called when renaming void FTrackModel::OnDeferredModifyFlush() { if (bNeedsUpdate) { ForceUpdate(); bNeedsUpdate = false; } } void FTrackModel::ForceUpdate() { // This constructor accesses nullpointer when a shared data is null FViewModelHierarchyOperation HierarchyOperation(GetSharedData());
The workaround is FViewModelHierarchyOperation() accepts null like this;
FViewModelHierarchyOperation::FViewModelHierarchyOperation(const TSharedPtr<FViewModel>& InAnyModel) : SharedData(InAnyModel ? InAnyModel->SharedData : nullptr)
Or prevent calling ForceUpdate() from OnDeferredModifyFlush() when IsConstructed() returns false.
Assertion failed: IsValid() [File:D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Templates\SharedPointer.h] [Line: 1113] UnrealEditor_SequencerCore!UE::Sequencer::FViewModelHierarchyOperation::FViewModelHierarchyOperation() [D:\build\++UE5\Sync\Engine\Source\Editor\SequencerCore\Private\MVVM\ViewModels\ViewModelHierarchy.cpp:369] UnrealEditor_Sequencer!UE::Sequencer::FTrackModel::ForceUpdate() [D:\build\++UE5\Sync\Engine\Source\Editor\Sequencer\Private\MVVM\ViewModels\TrackModel.cpp:145] UnrealEditor_Sequencer!UE::Sequencer::FTrackModel::OnDeferredModifyFlush() [D:\build\++UE5\Sync\Engine\Source\Editor\Sequencer\Private\MVVM\ViewModels\TrackModel.cpp:139] UnrealEditor_MovieScene!UE::MovieScene::SignalScopedSignedObjectModifyFlush() [D:\build\++UE5\Sync\Engine\Source\Runtime\MovieScene\Private\MovieSceneSignedObject.cpp:30] UnrealEditor_MovieScene!UE::MovieScene::FScopedSignedObjectModifyDefer::~FScopedSignedObjectModifyDefer() [D:\build\++UE5\Sync\Engine\Source\Runtime\MovieScene\Private\MovieSceneSignedObject.cpp:51] UnrealEditor_Sequencer!V::TBaseRawMethodDelegateInstance::ExecuteIfSafe() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:535] UnrealEditor_UnrealEd!TMulticastDelegate<void __cdecl(FTransactionContext const & __ptr64,ETransactionStateEventType),FDefaultDelegateUserPolicy>::Broadcast() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateSignatureImpl.inl:956] UnrealEditor_UnrealEd!UTransBuffer::End() [D:\build\++UE5\Sync\Engine\Source\Editor\UnrealEd\Private\EditorTransaction.cpp:1288] UnrealEditor_UnrealEd!UEditorEngine::EndTransaction() [D:\build\++UE5\Sync\Engine\Source\Editor\UnrealEd\Private\EditorServer.cpp:1110] UnrealEditor_UnrealEd!FScopedTransaction::~FScopedTransaction() [D:\build\++UE5\Sync\Engine\Source\Editor\UnrealEd\Private\ScopedTransaction.cpp:35] UnrealEditor_Sequencer!UE::Sequencer::FTrackModel::Rename() [D:\build\++UE5\Sync\Engine\Source\Editor\Sequencer\Private\MVVM\ViewModels\TrackModel.cpp:389] UnrealEditor_SequencerCore!UE::Sequencer::SOutlinerItemViewBase::OnNodeLabelTextCommitted() [D:\build\++UE5\Sync\Engine\Source\Editor\SequencerCore\Private\MVVM\Views\SOutlinerItemViewBase.cpp:287] UnrealEditor_SequencerCore!V::TBaseSPMethodDelegateInstance::ExecuteIfSafe() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:298] UnrealEditor_Slate!TDelegate<void __cdecl(FText const & __ptr64,ETextCommit::Type),FDefaultDelegateUserPolicy>::ExecuteIfBound<void,0>() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateSignatureImpl.inl:570] UnrealEditor_Slate!SInlineEditableTextBlock::OnTextBoxCommitted() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Private\Widgets\Text\SInlineEditableTextBlock.cpp:339] UnrealEditor_Slate!TBaseSPMethodDelegateInstance<0,SInlineEditableTextBlock,1,void __cdecl(FText const &,enum ETextCommit::Type),FDefaultDelegateUserPolicy>::ExecuteIfSafe() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:298] UnrealEditor_Slate!TDelegate<void __cdecl(FText const & __ptr64,ETextCommit::Type),FDefaultDelegateUserPolicy>::ExecuteIfBound<void,0>() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateSignatureImpl.inl:570] UnrealEditor_Slate!SEditableTextBox::OnEditableTextCommitted() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Private\Widgets\Input\SEditableTextBox.cpp:533] UnrealEditor_Slate!V::TBaseSPMethodDelegateInstance::ExecuteIfSafe() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:298] UnrealEditor_Slate!SEditableText::OnTextCommitted() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Private\Widgets\Input\SEditableText.cpp:648] UnrealEditor_Slate!FSlateEditableTextLayout::HandleCarriageReturn() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Private\Widgets\Text\SlateEditableTextLayout.cpp:1660] UnrealEditor_Slate!FSlateEditableTextLayout::HandleKeyDown() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Private\Widgets\Text\SlateEditableTextLayout.cpp:1102] UnrealEditor_Slate!SEditableText::OnKeyDown() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Private\Widgets\Input\SEditableText.cpp:242] UnrealEditor_Slate!FEventRouter::Route<FReply,FEventRouter::FBubblePolicy,FKeyEvent,`FSlateApplication::ProcessKeyDownEvent'::`22'::<lambda_2> >() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:447] UnrealEditor_Slate!FSlateApplication::ProcessKeyDownEvent() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:4785] UnrealEditor_Slate!FSlateApplication::OnKeyDown() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:4696] UnrealEditor_ApplicationCore!FWindowsApplication::ProcessDeferredMessage() [D:\build\++UE5\Sync\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsApplication.cpp:2078] UnrealEditor_ApplicationCore!FWindowsApplication::DeferMessage() [D:\build\++UE5\Sync\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsApplication.cpp:2750] UnrealEditor_ApplicationCore!FWindowsApplication::ProcessMessage() [D:\build\++UE5\Sync\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsApplication.cpp:1919] UnrealEditor_ApplicationCore!FWindowsApplication::AppWndProc() [D:\build\++UE5\Sync\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsApplication.cpp:929] user32 user32 UnrealEditor_ApplicationCore!FWindowsPlatformApplicationMisc::PumpMessages() [D:\build\++UE5\Sync\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsPlatformApplicationMisc.cpp:145] UnrealEditor!FEngineLoop::Tick() [D:\build\++UE5\Sync\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:5850] 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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There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-218237 in the post.
0 |
Component | UE - Anim - Sequencer |
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Affects Versions | 5.4 |
Target Fix | 5.5 |
Fix Commit | 35190705 |
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Created | Jun 18, 2024 |
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Resolved | Jul 30, 2024 |
Updated | Aug 5, 2024 |