Unreal Engine Issues and Bug Tracker (UE-45854)

Description

This is a common crash occurring in the 4.16 release. It seems to be related to applying a material to a mesh that is being used in Foliage.

Crash Reports are spread out among many different CrashGroups. Here are a few:

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User Descriptions

Too many foilage objects in scene, said objects proceeded to crash the engine when a texture was applied to the base model
whoops
putting texture on a prop

Source Context

  916       void UObject::ConditionalPostLoad()
  917       {
  918       	check(!GEventDrivenLoaderEnabled || !HasAnyFlags(RF_NeedLoad)); //@todoio Added this as "nicks rule"
  919       									  // PostLoad only if the object needs it and has already been serialized
  920       	//@todoio note this logic should be unchanged compared to main
  921 ***** 	if (HasAnyFlags(RF_NeedPostLoad))
  922       	{
  923       
  924       		check(IsInGameThread() || HasAnyFlags(RF_ClassDefaultObject|RF_ArchetypeObject) || IsPostLoadThreadSafe() || IsA(UClass::StaticClass()))

Steps to Reproduce

New Repro

Open QAGame in editor
Change to foliage tab and add the Foliage-CullDistance and Shape_QuadPyramid_settings foliage types
Paint in the viewport on the floor mesh
Right click on Foliage-CullDistance in the foliage tab and replace with Shape_QuadPyramid_settings
Open Shape_QuadPyramid in static mesh editor from the details section of the foliage tab
Change material in slot 1

Result: crash

Freq: 4 for 4

Old Repro

Open QAGame in editor
Create a new landscape
Change to foliage tab and add the TallGrass_01 foliage type
Paint on the landscape
Simulate
Exit simulate
Open Foliage_TallGrass in static mesh editor
Change material in slot 1 to aluminum
Repeat steps 4-8 using different materials

Result: crash

Freq: 2 out of 10

Callstack

Access violation - code c0000005 (first/second chance not available)

UE4Editor_CoreUObject!UObject::ConditionalPostLoad() [obj.cpp:922]
UE4Editor_Engine!UHierarchicalInstancedStaticMeshComponent::BuildTreeIfOutdated() [hierarchicalinstancedstaticmesh.cpp:2384]
UE4Editor_Foliage!TBaseRawMethodDelegateInstance<0,FFoliageMeshInfo,void __cdecl() [delegateinstancesimpl.h:648]
UE4Editor_Engine!TBaseMulticastDelegate<void,FBoxSphereBounds const & __ptr64>::Broadcast() [delegatesignatureimpl.inl:937]
UE4Editor_Engine!UStaticMesh::CalculateExtendedBounds() [staticmesh.cpp:2240]
UE4Editor_Engine!UStaticMesh::Build() [staticmeshbuild.cpp:169]
UE4Editor_Engine!UStaticMesh::PostEditChangeProperty() [staticmesh.cpp:1790]
UE4Editor_StaticMeshEditor!FMeshMaterialsLayout::CallPostEditChange() [staticmesheditortools.cpp:2543]
UE4Editor_StaticMeshEditor!FMeshMaterialsLayout::OnMaterialChanged() [staticmesheditortools.cpp:2093]
UE4Editor_StaticMeshEditor!TBaseSPMethodDelegateInstance<0,FMeshMaterialsLayout,0,TTypeWrapper<void> __cdecl() [delegateinstancesimpl.h:327]
UE4Editor_StaticMeshEditor!TBaseSPMethodDelegateInstance<0,FMeshMaterialsLayout,0,void __cdecl() [delegateinstancesimpl.h:434]
UE4Editor_PropertyEditor!TBaseDelegate<void,UMaterialInterface * __ptr64,UMaterialInterface * __ptr64,int,bool>::ExecuteIfBound() [delegatesignatureimpl.inl:624]
UE4Editor_PropertyEditor!FMaterialItemView::ReplaceMaterial() [propertycustomizationhelpers.cpp:829]
UE4Editor_PropertyEditor!TBaseSPMethodDelegateInstance<0,FMaterialItemView,0,TTypeWrapper<void> __cdecl() [delegateinstancesimpl.h:327]
UE4Editor_PropertyEditor!TBaseSPMethodDelegateInstance<0,FMaterialItemView,0,void __cdecl() [delegateinstancesimpl.h:434]
UE4Editor_PropertyEditor!SPropertyEditorAsset::SetValue() [spropertyeditorasset.cpp:610]
UE4Editor_PropertyEditor!TBaseSPMethodDelegateInstance<0,SPropertyEditorAsset,0,TTypeWrapper<void> __cdecl() [delegateinstancesimpl.h:327]
UE4Editor_PropertyEditor!TBaseSPMethodDelegateInstance<0,SPropertyEditorAsset,0,void __cdecl() [delegateinstancesimpl.h:434]
UE4Editor_PropertyEditor!SPropertyMenuAssetPicker::OnAssetSelected() [spropertymenuassetpicker.cpp:249]
UE4Editor_PropertyEditor!TBaseSPMethodDelegateInstance<0,SPropertyMenuAssetPicker,0,TTypeWrapper<void> __cdecl() [delegateinstancesimpl.h:327]
UE4Editor_PropertyEditor!TBaseSPMethodDelegateInstance<0,SPropertyMenuAssetPicker,0,void __cdecl() [delegateinstancesimpl.h:434]
UE4Editor_ContentBrowser!SAssetView::AssetSelectionChanged() [sassetview.cpp:3620]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SAssetView,0,TTypeWrapper<void> __cdecl() [delegateinstancesimpl.h:327]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SAssetView,0,void __cdecl() [delegateinstancesimpl.h:434]
UE4Editor_ContentBrowser!TBaseDelegate<void,TSharedPtr<FAssetViewItem,0>,enum ESelectInfo::Type>::ExecuteIfBound() [delegatesignatureimpl.inl:624]
UE4Editor_ContentBrowser!SListView<TSharedPtr<FAssetViewItem,0> >::Private_SignalSelectionChanged() [slistview.h:735]
UE4Editor_ContentBrowser!STableRow<TSharedPtr<FAssetViewItem,0> >::OnMouseButtonUp() [stablerow.h:476]
UE4Editor_Slate!<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1>::operator() [slateapplication.cpp:5049]
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1> >() [slateapplication.cpp:239]
UE4Editor_Slate!FSlateApplication::RoutePointerUpEvent() [slateapplication.cpp:5038]
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonUpEvent() [slateapplication.cpp:5515]
UE4Editor_Slate!FSlateApplication::OnMouseUp() [slateapplication.cpp:5495]
UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() [windowsapplication.cpp:1704]
UE4Editor_Core!FWindowsApplication::DeferMessage() [windowsapplication.cpp:2127]
UE4Editor_Core!FWindowsApplication::ProcessMessage() [windowsapplication.cpp:867]
UE4Editor_Core!FWindowsApplication::AppWndProc() [windowsapplication.cpp:714]
user32!UserCallWinProcCheckWow()
user32!DispatchMessageWorker()
UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() [windowsplatformmisc.cpp:1009]
UE4Editor!FEngineLoop::Tick() [launchengineloop.cpp:3058]
UE4Editor!GuardedMain() [launch.cpp:166]
UE4Editor!GuardedMainWrapper() [launchwindows.cpp:134]
UE4Editor!WinMain() [launchwindows.cpp:210]
UE4Editor!__scrt_common_main_seh() [exe_common.inl:253]
kernel32!BaseThreadInitThunk()
ntdll!RtlUserThreadStart()

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Fixed

Component	UE - World Creation - Worldbuilding Tools - Foliage
Affects Versions	4.16
Target Fix	4.19

Fix Commit	3857933
Main Commit	3990065
Release Commit	3857933

Created	Jun 8, 2017
Resolved	Jan 26, 2018
Updated	May 9, 2020

View Jira Issue

UE-45854

[CrashReport] UE4Editor_Engine!UHierarchicalInstancedStaticMeshComponent::BuildTreeIfOutdated

[CrashReport] UE4Editor_Engine!UHierarchicalInstancedStaticMeshComponent::BuildTreeIfOutdated

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