#15 crash out of 7012 in UE 5.6.1 on Windows
#7 crash for UE - Rendering Architecture in UE 5.6.1 on Windows
#2 crash for UE - Rendering Architecture - Materials in UE 5.6.1 on Windows
Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Containers\Array.h] [Line: 1067] Array index out of bounds: -1 into an array of size 0
Type: Assert
User activity hint: Layout="StandaloneToolkit" Label="tree_dissolve_trunk_1" Conten
First occurrence: May 14 2025, 11:16:20 AM
Last occurrence: September 18th 2025, 12:37:35 pm
Latest version: 5.6.1-44394996+++UE5+Release-5.6
Users affected: 1382
Total occurrences: 2253
Symbols: \\epicgames.net\root\Builds\UE5\Releases\5.6.1-44394996+++UE5+Release-5.6
No known deterministic repro steps currently
UnrealEditor-Core!FDebug::CheckVerifyFailedImpl2(char const *,char const *,int,wchar_t const *,...) [Engine/Source/Runtime/Core/Private/Misc/AssertionMacros.cpp:728] UnrealEditor-Engine!static class FText ??R<lambda_1>@?CC@??AddParameter@FMaterialCachedExpressionData@@QEAA_NAEBUFMaterialParameterInfo@@AEBUFMaterialParameterMetadata@@AEAPEAVUObject@@AEAPEAVUTextureCollection@@AEAVFText@@@Z@QEBA?AV7@AEBUFMaterialCachedParameterEditorInfo@@@Z(const struct FMaterialCachedParameterEditorInfo & const) [Engine/Source/Runtime/Engine/Private/Materials/MaterialCachedData.cpp:279] UnrealEditor-Engine!static class FText ??R<lambda_2>@?CC@??AddParameter@FMaterialCachedExpressionData@@QEAA_NAEBUFMaterialParameterInfo@@AEBUFMaterialParameterMetadata@@AEAPEAVUObject@@AEAPEAVUTextureCollection@@AEAVFText@@@Z@QEBA?AV7@AEBVFString@@5AEBUFMaterialCachedParameterEditorInfo@@6@Z(const class FString & const, const class FString & const, const struct FMaterialCachedParameterEditorInfo & const, const struct FMaterialCachedParameterEditorInfo & const) [Engine/Source/Runtime/Engine/Private/Materials/MaterialCachedData.cpp:285] UnrealEditor-Engine!FMaterialCachedExpressionData::AddParameter(FMaterialParameterInfo const &,FMaterialParameterMetadata const &,UObject * &,UTextureCollection * &,FText &) [Engine/Source/Runtime/Engine/Private/Materials/MaterialCachedData.cpp:296] UnrealEditor-Engine!FMaterialCachedExpressionData::UpdateForExpressions(FMaterialCachedExpressionContext const &,TArrayView<TObjectPtr<UMaterialExpression> const ,int>,EMaterialParameterAssociation,int) [Engine/Source/Runtime/Engine/Private/Materials/MaterialCachedData.cpp:491] UnrealEditor-Engine!UMaterial::UpdateCachedExpressionData() [Engine/Source/Runtime/Engine/Private/Materials/Material.cpp:2239] UnrealEditor-Engine!UMaterial::PostEditChangePropertyInternal(FPropertyChangedEvent &,UMaterial::EPostEditChangeEffectOnShaders) [Engine/Source/Runtime/Engine/Private/Materials/Material.cpp:5336] UnrealEditor-UnrealEd!ObjectTools::ForceReplaceReferences(TArrayView<ObjectTools::FReplaceRequest,int>,TSet<UObject *,DefaultKeyFuncs<UObject *,0>,FDefaultSetAllocator> &,ObjectTools::FForceReplaceInfo &,bool) [Engine/Source/Editor/UnrealEd/Private/ObjectTools.cpp:1440] UnrealEditor-UnrealEd!static void ObjectTools::ForceReplaceReferences(class UObject *, class TArray<UObject *,TSizedDefaultAllocator<32> > & const, struct ObjectTools::FForceReplaceInfo & const, bool) [Engine/Source/Editor/UnrealEd/Private/ObjectTools.cpp:1478] UnrealEditor-UnrealEd!ObjectTools::ForceDeleteObjects(TArray<UObject *,TSizedDefaultAllocator<32> > const &,bool) [Engine/Source/Editor/UnrealEd/Private/ObjectTools.cpp:3862] UnrealEditor-UnrealEd!FAssetDeleteModel::DoForceDelete() [Engine/Source/Editor/UnrealEd/Private/AssetDeleteModel.cpp:322] UnrealEditor-UnrealEd!SDeleteAssetsDialog::ForceDelete() [Engine/Source/Editor/UnrealEd/Private/Dialogs/SDeleteAssetsDialog.cpp:730] UnrealEditor-UnrealEd!class FReply V::TBaseSPMethodDelegateInstance::Execute() [Engine/Source/Runtime/Core/Public/Delegates/DelegateInstancesImpl.h:292] UnrealEditor-Slate!SButton::ExecuteOnClick() [Engine/Source/Runtime/Slate/Private/Widgets/Input/SButton.cpp:495] UnrealEditor-Slate!SButton::OnMouseButtonUp(FGeometry const &,FPointerEvent const &) [Engine/Source/Runtime/Slate/Private/Widgets/Input/SButton.cpp:419] UnrealEditor-Slate!static class FReply ??R<lambda_2>@?7??RoutePointerUpEvent@FSlateApplication@@QEAA?AVFReply@@AEBVFWidgetPath@@AEBUFPointerEvent@@@Z@QEBA@AEBVFArrangedWidget@@1@Z(const class FArrangedWidget & const, const struct FPointerEvent & const) [Engine/Source/Runtime/Slate/Private/Framework/Application/SlateApplication.cpp:5367] UnrealEditor-Slate!static class FReply ??$Route@VFReply@@VFToLeafmostPolicy@FEventRouter@@UFPointerEvent@@V<lambda_2>@?7??RoutePointerUpEvent@FSlateApplication@@QEAA?AV1@AEBVFWidgetPath@@AEBU4@@Z@@FEventRouter@@SA?AVFReply@@PEAVFSlateApplication@@VFToLeafmostPolicy@0@UFPointerEvent@@AEBV<lambda_2>@?7??RoutePointerUpEvent@2@QEAA?AV1@AEBVFWidgetPath@@AEBU4@@Z@W4ESlateDebuggingInputEvent@@@Z(class FSlateApplication *, class FEventRouter::FToLeafmostPolicy, struct FPointerEvent, const class FSlateApplication::RoutePointerUpEvent::__l8::<lambda_2> & const, ESlateDebuggingInputEvent) [Engine/Source/Runtime/Slate/Private/Framework/Application/SlateApplication.cpp:456] UnrealEditor-Slate!FSlateApplication::RoutePointerUpEvent(FWidgetPath const &,FPointerEvent const &) [Engine/Source/Runtime/Slate/Private/Framework/Application/SlateApplication.cpp:5353] UnrealEditor-Slate!FSlateApplication::ProcessMouseButtonUpEvent(FPointerEvent const &) [Engine/Source/Runtime/Slate/Private/Framework/Application/SlateApplication.cpp:5938] UnrealEditor-Slate!FSlateApplication::OnMouseUp(EMouseButtons::Type,UE::Math::TVector2<double>) [Engine/Source/Runtime/Slate/Private/Framework/Application/SlateApplication.cpp:5894] UnrealEditor-ApplicationCore!FWindowsApplication::ProcessDeferredMessage(FDeferredWindowsMessage const &) [Engine/Source/Runtime/ApplicationCore/Private/Windows/WindowsApplication.cpp:3052] UnrealEditor-ApplicationCore!FWindowsApplication::DeferMessage(TSharedPtr<FWindowsWindow,1> &,HWND__ *,unsigned int,unsigned __int64,__int64,int,int,unsigned int) [Engine/Source/Runtime/ApplicationCore/Private/Windows/WindowsApplication.cpp:3570] UnrealEditor-ApplicationCore!FWindowsApplication::ProcessMessage(HWND__ *,unsigned int,unsigned __int64,__int64) [Engine/Source/Runtime/ApplicationCore/Private/Windows/WindowsApplication.cpp:2725] UnrealEditor-ApplicationCore!FWindowsApplication::AppWndProc(HWND__ *,unsigned int,unsigned __int64,__int64) [Engine/Source/Runtime/ApplicationCore/Private/Windows/WindowsApplication.cpp:1722] USER32!0x00007ffe0f3e0000 + d159 USER32!0x00007ffe0f3e0000 + b152 UnrealEditor-ApplicationCore!FWindowsApplication::PumpMessages(float) [Engine/Source/Runtime/ApplicationCore/Private/Windows/WindowsApplication.cpp:3582] UnrealEditor-Slate!FSlateApplication::TickPlatform(float) [Engine/Source/Runtime/Slate/Private/Framework/Application/SlateApplication.cpp:1620] UnrealEditor-Slate!FSlateApplication::AddModalWindow(TSharedRef<SWindow,1>,TSharedPtr<SWidget const ,1>,bool) [Engine/Source/Runtime/Slate/Private/Framework/Application/SlateApplication.cpp:2155] UnrealEditor-UnrealEd!UEditorEngine::EditorAddModalWindow(TSharedRef<SWindow,1>) [Engine/Source/Editor/UnrealEd/Private/EditorEngine.cpp:3934] UnrealEditor-UnrealEd!ObjectTools::DeleteObjects(TArray<UObject *,TSizedDefaultAllocator<32> > const &,bool,ObjectTools::EAllowCancelDuringDelete) [Engine/Source/Editor/UnrealEd/Private/ObjectTools.cpp:3151] UnrealEditor-AssetTools!AssetViewUtils::DeleteFolders(TArray<FString,TSizedDefaultAllocator<32> > const &) [Engine/Source/Developer/AssetTools/Private/AssetViewUtils.cpp:476] UnrealEditor-ContentBrowserAssetDataSource!ContentBrowserAssetData::DeleteAssetFolderItems(TArrayView<TSharedRef<FContentBrowserAssetFolderItemDataPayload const ,1> const ,int>) [Engine/Plugins/Editor/ContentBrowser/ContentBrowserAssetDataSource/Source/ContentBrowserAssetDataSource/Private/ContentBrowserAssetDataCore.cpp:937] UnrealEditor-ContentBrowserAssetDataSource!ContentBrowserAssetData::DeleteItems(IAssetTools *,IAssetRegistry *,UContentBrowserDataSource const *,TArrayView<FContentBrowserItemData const ,int>) [Engine/Plugins/Editor/ContentBrowser/ContentBrowserAssetDataSource/Source/ContentBrowserAssetDataSource/Private/ContentBrowserAssetDataCore.cpp:875] UnrealEditor-ContentBrowserAssetDataSource!UContentBrowserAssetDataSource::BulkDeleteItems(TArrayView<FContentBrowserItemData const ,int>) [Engine/Plugins/Editor/ContentBrowser/ContentBrowserAssetDataSource/Source/ContentBrowserAssetDataSource/Private/ContentBrowserAssetDataSource.cpp:2779] UnrealEditor-ContentBrowser!FAssetContextMenu::ExecuteDeleteFolderConfirmed() [Engine/Source/Editor/ContentBrowser/Private/AssetContextMenu.cpp:1273] UnrealEditor-ContentBrowser!class FReply V::TBaseSPMethodDelegateInstance::Execute() [Engine/Source/Runtime/Core/Public/Delegates/DelegateInstancesImpl.h:292] UnrealEditor-ContentBrowser!SContentBrowserConfirmPopup::YesClicked() [Engine/Source/Editor/ContentBrowser/Private/ContentBrowserUtils.cpp:308] UnrealEditor-ContentBrowser!class FReply V::TBaseSPMethodDelegateInstance::Execute() [Engine/Source/Runtime/Core/Public/Delegates/DelegateInstancesImpl.h:292] UnrealEditor-Slate!SButton::ExecuteOnClick() [Engine/Source/Runtime/Slate/Private/Widgets/Input/SButton.cpp:495] UnrealEditor-Slate!SButton::OnMouseButtonUp(FGeometry const &,FPointerEvent const &) [Engine/Source/Runtime/Slate/Private/Widgets/Input/SButton.cpp:419] UnrealEditor-Slate!static class FReply ??R<lambda_2>@?7??RoutePointerUpEvent@FSlateApplication@@QEAA?AVFReply@@AEBVFWidgetPath@@AEBUFPointerEvent@@@Z@QEBA@AEBVFArrangedWidget@@1@Z(const class FArrangedWidget & const, const struct FPointerEvent & const) [Engine/Source/Runtime/Slate/Private/Framework/Application/SlateApplication.cpp:5367] UnrealEditor-Slate!static class FReply ??$Route@VFReply@@VFToLeafmostPolicy@FEventRouter@@UFPointerEvent@@V<lambda_2>@?7??RoutePointerUpEvent@FSlateApplication@@QEAA?AV1@AEBVFWidgetPath@@AEBU4@@Z@@FEventRouter@@SA?AVFReply@@PEAVFSlateApplication@@VFToLeafmostPolicy@0@UFPointerEvent@@AEBV<lambda_2>@?7??RoutePointerUpEvent@2@QEAA?AV1@AEBVFWidgetPath@@AEBU4@@Z@W4ESlateDebuggingInputEvent@@@Z(class FSlateApplication *, class FEventRouter::FToLeafmostPolicy, struct FPointerEvent, const class FSlateApplication::RoutePointerUpEvent::__l8::<lambda_2> & const, ESlateDebuggingInputEvent) [Engine/Source/Runtime/Slate/Private/Framework/Application/SlateApplication.cpp:456] UnrealEditor-Slate!FSlateApplication::RoutePointerUpEvent(FWidgetPath const &,FPointerEvent const &) [Engine/Source/Runtime/Slate/Private/Framework/Application/SlateApplication.cpp:5353] UnrealEditor-Slate!FSlateApplication::ProcessMouseButtonUpEvent(FPointerEvent const &) [Engine/Source/Runtime/Slate/Private/Framework/Application/SlateApplication.cpp:5938] UnrealEditor-Slate!FSlateApplication::OnMouseUp(EMouseButtons::Type,UE::Math::TVector2<double>) [Engine/Source/Runtime/Slate/Private/Framework/Application/SlateApplication.cpp:5894] UnrealEditor-ApplicationCore!FWindowsApplication::ProcessDeferredMessage(FDeferredWindowsMessage const &) [Engine/Source/Runtime/ApplicationCore/Private/Windows/WindowsApplication.cpp:3052] UnrealEditor-ApplicationCore!FWindowsApplication::DeferMessage(TSharedPtr<FWindowsWindow,1> &,HWND__ *,unsigned int,unsigned __int64,__int64,int,int,unsigned int) [Engine/Source/Runtime/ApplicationCore/Private/Windows/WindowsApplication.cpp:3570] UnrealEditor-ApplicationCore!FWindowsApplication::ProcessMessage(HWND__ *,unsigned int,unsigned __int64,__int64) [Engine/Source/Runtime/ApplicationCore/Private/Windows/WindowsApplication.cpp:2725] UnrealEditor-ApplicationCore!FWindowsApplication::AppWndProc(HWND__ *,unsigned int,unsigned __int64,__int64) [Engine/Source/Runtime/ApplicationCore/Private/Windows/WindowsApplication.cpp:1722] USER32!0x00007ffe0f3e0000 + d159 USER32!0x00007ffe0f3e0000 + b152 UnrealEditor-ApplicationCore!FWindowsPlatformApplicationMisc::PumpMessages(bool) [Engine/Source/Runtime/ApplicationCore/Private/Windows/WindowsPlatformApplicationMisc.cpp:145] UnrealEditor!FEngineLoop::Tick() [Engine/Source/Runtime/Launch/Private/LaunchEngineLoop.cpp:5554] UnrealEditor!GuardedMain(wchar_t const *) [Engine/Source/Runtime/Launch/Private/Launch.cpp:187] UnrealEditor!GuardedMainWrapper(wchar_t const *) [Engine/Source/Runtime/Launch/Private/Windows/LaunchWindows.cpp:128] UnrealEditor!LaunchWindowsStartup(HINSTANCE__ *,HINSTANCE__ *,char *,int,wchar_t const *) [Engine/Source/Runtime/Launch/Private/Windows/LaunchWindows.cpp:282] UnrealEditor!WinMain [Engine/Source/Runtime/Launch/Private/Windows/LaunchWindows.cpp:339] UnrealEditor!static int __scrt_common_main_seh() [D:\a\_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288] KERNEL32!0x00007ffe0f1b0000 + 2e8d7 ntdll!0x00007ffe10340000 + 3c34c
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-297660 in the post.
| 0 |
| Component | UE - Rendering Architecture - Materials |
|---|---|
| Affects Versions | 5.6, 5.6.1 |
| Target Fix | 5.7 |
| Fix Commit | 45583566 |
|---|
| Created | Jun 20, 2025 |
|---|---|
| Resolved | Sep 8, 2025 |
| Updated | Oct 27, 2025 |