When adding a Material Layer, that has a Static Component Mask Parameter node in it, to a Material Instance, the editor will crash.
The ability to set Material Attribute layers in a Material Instance is not available in 4.25.4, so not marking as a Regression.
RESULT:
The engine crashes
EXPECTED:
The user would be able to use a Static Component Mask Parameter node in a Material Layer without crashing
=== Critical error: === Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Public\Containers/Array.h] [Line: 674] Array index out of bounds: 0 from an array of size 0 [Callstack] 0x00007ff8caab3b19 KERNELBASE.dll!UnknownFunction [] [Callstack] 0x00007ff87ec3d066 UE4Editor-Core.dll!ReportAssert() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Private\Windows\WindowsPlatformCrashContext.cpp:1616] [Callstack] 0x00007ff87ec407a8 UE4Editor-Core.dll!FWindowsErrorOutputDevice::Serialize() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Private\Windows\WindowsErrorOutputDevice.cpp:78] [Callstack] 0x00007ff87e94e8cd UE4Editor-Core.dll!FOutputDevice::LogfImpl() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Private\Misc\OutputDevice.cpp:61] [Callstack] 0x00007ff87e8e5575 UE4Editor-Core.dll!AssertFailedImplV() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Private\Misc\AssertionMacros.cpp:104] [Callstack] 0x00007ff87e8e7620 UE4Editor-Core.dll!FDebug::CheckVerifyFailedImpl() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Private\Misc\AssertionMacros.cpp:461] [Callstack] 0x00007ff87d1e8208 UE4Editor-Engine.dll!DispatchCheckVerify<void,<lambda_a42d0919e8303add9bf9f7b44044abc5> >() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Public\Misc\AssertionMacros.h:165] [Callstack] 0x00007ff87c1f946c UE4Editor-Engine.dll!FMaterialCachedExpressionData::UpdateForExpressions() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\Materials\MaterialCachedData.cpp:528] [Callstack] 0x00007ff87c18fc5d UE4Editor-Engine.dll!<lambda_52b30304b52de31a4a8cc5e30d70deca>::operator()() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\Materials\MaterialCachedData.cpp:222] [Callstack] 0x00007ff87c1fabeb UE4Editor-Engine.dll!FMaterialCachedExpressionData::UpdateForFunction() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\Materials\MaterialCachedData.cpp:239] [Callstack] 0x00007ff87c1fac92 UE4Editor-Engine.dll!FMaterialCachedExpressionData::UpdateForLayerFunctions() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\Materials\MaterialCachedData.cpp:247] [Callstack] 0x00007ff87c2895e2 UE4Editor-Engine.dll!UMaterialInstance::UpdateCachedLayerParameters() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\Materials\MaterialInstance.cpp:4031] [Callstack] 0x00007ff87c27159b UE4Editor-Engine.dll!UMaterialInstance::PostEditChangeProperty() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\Materials\MaterialInstance.cpp:4097] [Callstack] 0x00007ff87c271dde UE4Editor-Engine.dll!UMaterialInstanceConstant::PostEditChangeProperty() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\Materials\MaterialInstanceConstant.cpp:55] [Callstack] 0x00007ff8ac234816 UE4Editor-CoreUObject.dll!UObject::PostEditChange() [D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\Obj.cpp:342] [Callstack] 0x00007ff85b8e75db UE4Editor-MaterialEditor.dll!UMaterialEditingLibrary::UpdateMaterialFunction() [D:\Build\++UE4\Sync\Engine\Source\Editor\MaterialEditor\Private\MaterialEditingLibrary.cpp:915] [Callstack] 0x00007ff85b8eb984 UE4Editor-MaterialEditor.dll!FMaterialEditor::UpdateOriginalMaterial() [D:\Build\++UE4\Sync\Engine\Source\Editor\MaterialEditor\Private\MaterialEditor.cpp:2102] [Callstack] 0x00007ff85b8b53b2 UE4Editor-MaterialEditor.dll!FMaterialEditor::OnApply() [D:\Build\++UE4\Sync\Engine\Source\Editor\MaterialEditor\Private\MaterialEditor.cpp:2786] [Callstack] 0x00007ff85b891436 UE4Editor-MaterialEditor.dll!TBaseSPMethodDelegateInstance<0,FMaterialEditor,0,void __cdecl(void),FDefaultDelegateUserPolicy>::ExecuteIfSafe() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:307] [Callstack] 0x00007ff87abe0088 UE4Editor-Slate.dll!FUICommandList::ExecuteAction() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Slate\Private\Framework\Commands\UICommandList.cpp:102] [Callstack] 0x00007ff87accf342 UE4Editor-Slate.dll!SToolBarButtonBlock::OnClicked() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Slate\Private\Framework\MultiBox\SToolBarButtonBlock.cpp:301] [Callstack] 0x00007ff87acabd07 UE4Editor-Slate.dll!TBaseSPMethodDelegateInstance<0,SToolBarButtonBlock,0,FReply __cdecl(void),FDefaultDelegateUserPolicy>::Execute() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:290] [Callstack] 0x00007ff87ad4859e UE4Editor-Slate.dll!SButton::ExecuteOnClick() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Slate\Private\Widgets\Input\SButton.cpp:385] [Callstack] 0x00007ff87ad6071e UE4Editor-Slate.dll!SButton::OnMouseButtonUp() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Slate\Private\Widgets\Input\SButton.cpp:304] [Callstack] 0x00007ff87aba46be UE4Editor-Slate.dll!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_cc5aea9e7377b04ce85c30c65ec3889b> >() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:378] [Callstack] 0x00007ff87ac27f14 UE4Editor-Slate.dll!FSlateApplication::RoutePointerUpEvent() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:4815] [Callstack] 0x00007ff87ac10337 UE4Editor-Slate.dll!FSlateApplication::ProcessMouseButtonUpEvent() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:5356] [Callstack] 0x00007ff87ac03632 UE4Editor-Slate.dll!FSlateApplication::OnMouseUp() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:5321] [Callstack] 0x00007ff8b168bcb5 UE4Editor-ApplicationCore.dll!FWindowsApplication::ProcessDeferredMessage() [D:\Build\++UE4\Sync\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsApplication.cpp:2178] [Callstack] 0x00007ff8b1679197 UE4Editor-ApplicationCore.dll!FWindowsApplication::DeferMessage() [D:\Build\++UE4\Sync\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsApplication.cpp:2642] [Callstack] 0x00007ff8b168e389 UE4Editor-ApplicationCore.dll!FWindowsApplication::ProcessMessage() [D:\Build\++UE4\Sync\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsApplication.cpp:1046] [Callstack] 0x00007ff8b1674310 UE4Editor-ApplicationCore.dll!FWindowsApplication::AppWndProc() [D:\Build\++UE4\Sync\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsApplication.cpp:878] [Callstack] 0x00007ff8ccf35c1d USER32.dll!UnknownFunction [] [Callstack] 0x00007ff8ccf35612 USER32.dll!UnknownFunction [] [Callstack] 0x00007ff8b168f914 UE4Editor-ApplicationCore.dll!FWindowsPlatformApplicationMisc::PumpMessages() [D:\Build\++UE4\Sync\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsPlatformApplicationMisc.cpp:130] [Callstack] 0x00007ff7c02e8848 UE4Editor.exe!FEngineLoop::Tick() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:4748] [Callstack] 0x00007ff7c030117c UE4Editor.exe!GuardedMain() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\Launch.cpp:169] [Callstack] 0x00007ff7c030125a UE4Editor.exe!GuardedMainWrapper() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:137] [Callstack] 0x00007ff7c03152bd UE4Editor.exe!WinMain() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:268] [Callstack] 0x00007ff7c0317fea UE4Editor.exe!__scrt_common_main_seh() [d:\agent\_work\5\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288] [Callstack] 0x00007ff8cd7c7c24 KERNEL32.DLL!UnknownFunction [] [Callstack] 0x00007ff8cd9cd721 ntdll.dll!UnknownFunction []
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-113590 in the post.