Unreal Engine Issues

UE-54423

Crash Occurs When Mesh is Reimported Multiple Times in the Mesh Editor

Crash Occurs When Mesh is Reimported Multiple Times in the Mesh Editor

Description

Engine crashes when asset has been reimported multiple times through the mesh editor
-Editor crashes in Main when reimporting
-Editor crashes in 4.17 when changing the Import Transforms

Steps to Reproduce
  1. Download attached project
  2. Open static mesh SM_grass001
  3. See Transform settings in the Details panel of mesh editor (both Z transforms are set to 100)
  4. Go to Asset < Reimport SM_grass001
  5. Reimport a few times (about 4 or 5)
  6. Note that the grass location changes and eventually resets to its original location
  7. Editor will crash

Expected: Editor does not crash after asset has been reimported multiple times
Results: Editor crashes after asset is reimported multiple times

Callstack
LoginId:bdcd2df1437ec38ad0d19c85e30ff2d1
EpicAccountId:1ed52ca976af4368b6c30d11b7cdc18f

Assertion failed: LightMapCoordinateIndex < (int)GetNumTexCoords() && LightMapCoordinateIndex >= 0 [File:D:\Main Workspace\Engine\Source\Runtime\Engine\Private\Rendering\StaticMeshVertexBuffer.cpp] [Line: 485]

UE4Editor_Core!FDebug::AssertFailed() [d:\main workspace\engine\source\runtime\core\private\misc\assertionmacros.cpp:419]
UE4Editor_Engine!FStaticMeshVertexBuffer::BindLightMapVertexBuffer() [d:\main workspace\engine\source\runtime\engine\private\rendering\staticmeshvertexbuffer.cpp:486]
UE4Editor_Engine!FInstancedStaticMeshRenderData::InitStaticMeshVertexFactories() [d:\main workspace\engine\source\runtime\engine\private\instancedstaticmesh.cpp:610]
UE4Editor_Engine!TGraphTask<TEnqueueUniqueRenderCommandType<`FInstancedStaticMeshRenderData::ReInitVertexFactories'::`2'::CallInitStaticMeshVertexFactoryName,<lambda_419fe0e00f28e07334541444dcd273da> > >::ExecuteTask() [d:\main workspace\engine\source\runtime\core\public\async\taskgraphinterfaces.h:829]
UE4Editor_Core!FNamedTaskThread::ProcessTasksNamedThread() [d:\main workspace\engine\source\runtime\core\private\async\taskgraph.cpp:665]
UE4Editor_Core!FNamedTaskThread::ProcessTasksUntilQuit() [d:\main workspace\engine\source\runtime\core\private\async\taskgraph.cpp:574]
UE4Editor_RenderCore!RenderingThreadMain() [d:\main workspace\engine\source\runtime\rendercore\private\renderingthread.cpp:331]
UE4Editor_RenderCore!FRenderingThread::Run() [d:\main workspace\engine\source\runtime\rendercore\private\renderingthread.cpp:465]
UE4Editor_Core!FRunnableThreadWin::Run() [d:\main workspace\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:76]
LoginId:bdcd2df1437ec38ad0d19c85e30ff2d1
EpicAccountId:1ed52ca976af4368b6c30d11b7cdc18f

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

UE4Editor_Engine!UHierarchicalInstancedStaticMeshComponent::BuildTreeIfOutdated() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\engine\private\hierarchicalinstancedstaticmesh.cpp:2366]
UE4Editor_Foliage!TBaseRawMethodDelegateInstance<0,FFoliageMeshInfo,void __cdecl(FBoxSphereBounds const & __ptr64)>::ExecuteIfSafe() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:648]
UE4Editor_Engine!TBaseMulticastDelegate<void,FBoxSphereBounds const & __ptr64>::Broadcast() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\core\public\delegates\delegatesignatureimpl.inl:937]
UE4Editor_Engine!UStaticMesh::CalculateExtendedBounds() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\engine\private\staticmesh.cpp:2242]
UE4Editor_Engine!UStaticMesh::Build() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\engine\private\staticmeshbuild.cpp:169]
UE4Editor_Engine!UStaticMesh::PostEditChangeProperty() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\engine\private\staticmesh.cpp:1790]
UE4Editor_CoreUObject!UObject::PostEditChangeChainProperty() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\coreuobject\private\uobject\obj.cpp:436]
UE4Editor_PropertyEditor!FPropertyNode::NotifyPostChange() [d:\build\++ue4+release-4.17+compile\sync\engine\source\editor\propertyeditor\private\propertynode.cpp:2360]
UE4Editor_PropertyEditor!FPropertyValueImpl::ImportText() [d:\build\++ue4+release-4.17+compile\sync\engine\source\editor\propertyeditor\private\propertyhandleimpl.cpp:558]
UE4Editor_PropertyEditor!FPropertyValueImpl::ImportText() [d:\build\++ue4+release-4.17+compile\sync\engine\source\editor\propertyeditor\private\propertyhandleimpl.cpp:358]
UE4Editor_PropertyEditor!FPropertyHandleFloat::SetValue() [d:\build\++ue4+release-4.17+compile\sync\engine\source\editor\propertyeditor\private\propertyhandleimpl.cpp:3106]
UE4Editor_DetailCustomizations!FMathStructCustomization::SetValue<float>() [d:\build\++ue4+release-4.17+compile\sync\engine\source\editor\detailcustomizations\private\mathstructcustomizations.cpp:472]
UE4Editor_DetailCustomizations!FMathStructCustomization::OnValueCommitted<float>() [d:\build\++ue4+release-4.17+compile\sync\engine\source\editor\detailcustomizations\private\mathstructcustomizations.cpp:406]
UE4Editor_DetailCustomizations!TBaseSPMethodDelegateInstance<0,FMathStructCustomization,0,TTypeWrapper<void> __cdecl(float,enum ETextCommit::Type),TWeakPtr<IPropertyHandle,0> >::Execute() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:327]
UE4Editor_DetailCustomizations!TBaseSPMethodDelegateInstance<0,FMathStructCustomization,0,void __cdecl(float,enum ETextCommit::Type),TWeakPtr<IPropertyHandle,0> >::ExecuteIfSafe() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:434]
UE4Editor_DetailCustomizations!SSpinBox<float>::CommitValue() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\slate\public\widgets\input\sspinbox.h:858]
UE4Editor_DetailCustomizations!SSpinBox<float>::TextField_OnTextCommitted() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\slate\public\widgets\input\sspinbox.h:784]
UE4Editor_DetailCustomizations!TBaseSPMethodDelegateInstance<0,SSpinBox<float>,0,TTypeWrapper<void> __cdecl(FText const & __ptr64,enum ETextCommit::Type)>::Execute() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:327]
UE4Editor_DetailCustomizations!TBaseSPMethodDelegateInstance<0,SSpinBox<float>,0,void __cdecl(FText const & __ptr64,enum ETextCommit::Type)>::ExecuteIfSafe() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:434]
UE4Editor_Slate!FSlateEditableTextLayout::HandleFocusLost() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\slate\private\widgets\text\slateeditabletextlayout.cpp:697]
UE4Editor_Slate!FSlateApplication::SetUserFocus() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:2795]
UE4Editor_Slate!FSlateApplication::SetUserFocus() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:2497]
UE4Editor_Slate!FSlateApplication::ProcessReply() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:3191]
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FBubblePolicy,FPointerEvent,<lambda_7097b900f0e4be30d80fb18f98c51ea0> >() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:233]
UE4Editor_Slate!FSlateApplication::RoutePointerDownEvent() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5093]
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonDownEvent() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5050]
UE4Editor_Slate!FSlateApplication::OnMouseDown() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4968]
UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:1726]
UE4Editor_Core!FWindowsApplication::DeferMessage() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:2161]
UE4Editor_Core!FWindowsApplication::ProcessMessage() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:881]
UE4Editor_Core!FWindowsApplication::AppWndProc() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:721]
user32
user32
UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\core\private\windows\windowsplatformmisc.cpp:1009]
UE4Editor!FEngineLoop::Tick() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\launch\private\launchengineloop.cpp:3151]
UE4Editor!GuardedMain() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\launch\private\launch.cpp:166]
UE4Editor!GuardedMainWrapper() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:134]
UE4Editor!WinMain() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:210]
UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:253]
kernel32
ntdll

Have Comments or More Details?

There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-54423 in the post.

6
Login to Vote
Fixed
ComponentUE - World Creation - Worldbuilding Tools - Foliage
Affects Versions4.17.2, 4.18.3, 4.19, 4.20
Target Fix4.19
Fix Commit3897036
Main Commit3990065
Release Commit3897036
CreatedJan 24, 2018
ResolvedFeb 19, 2018
UpdatedApr 27, 2018