Description

User comment in crash group:

  • Wanted to delete a single field of my landscape wich is very big. Same error appears if I try to get a part of the landscape to another streaming level. Would be cool if you fix this. 
  678       	// Make sure out LastLOD is > of MinStreamedLOD otherwise we would not be using the right LOD->MIP, the only drawback is a possible minor memory usage for overallocating static mesh element batch
  679 ***** 	const int32 MinStreamedLOD = HeightmapTexture ? FMath::Min<int32>(((FTexture2DResource*)HeightmapTexture->Resource)->GetCurrentFirstMip(), FMath::CeilLogTwo(SubsectionSizeVerts) - 1) : 0;
  680       	LastLOD = FMath::Max(MinStreamedLOD, LastLOD);
  681       
  682       	ForcedLOD = ForcedLOD != INDEX_NONE ? FMath::Clamp<int32>(ForcedLOD, FirstLOD, LastLOD) : ForcedLOD;
  683       	LODBias = FMath::Clamp<int8>(LODBias, -MaxLOD, MaxLOD);
  684       
  685       	int8 LocalLODBias = LODBias + (int8)GLandscapeMeshLODBias;
  686       	MinValidLOD = FMath::Clamp<int8>(LocalLODBias, -MaxLOD, MaxLOD);
  687       	MaxValidLOD = FMath::Min<int32>(MaxLOD, MaxLOD + LocalLODBias);
 
Steps to Reproduce

No known steps to reproduce

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

UE4Editor_Landscape!FLandscapeComponentSceneProxy::FLandscapeComponentSceneProxy() [landscaperender.cpp:680]
UE4Editor_Landscape!ULandscapeComponent::CreateSceneProxy() [landscape.cpp:1013]
UE4Editor_Renderer!FScene::AddPrimitive() [rendererscene.cpp:847]
UE4Editor_Engine!UPrimitiveComponent::CreateRenderState_Concurrent() [primitivecomponent.cpp:438]
UE4Editor_Landscape!ULandscapeComponent::UpdateMaterialInstances() [landscapeedit.cpp:323]
UE4Editor_LandscapeEditor!ALandscape::SplitHeightmap() [landscapeedmode.cpp:137]
UE4Editor_LandscapeEditor!FEdModeLandscape::DeleteLandscapeComponents() [landscapeedmode.cpp:3212]
UE4Editor_LandscapeEditor!FLandscapeToolStrokeDeleteComponent::Apply() [landscapeedmodecomponenttools.cpp:1098]
UE4Editor_LandscapeEditor!FLandscapeToolBase<FLandscapeToolStrokeDeleteComponent>::BeginTool() [landscapeedmodetools.h:1342]
UE4Editor_LandscapeEditor!FEdModeLandscape::InputKey() [landscapeedmode.cpp:1455]
UE4Editor_UnrealEd!FEditorModeTools::InputKey() [editormodemanager.cpp:751]
UE4Editor_UnrealEd!FEditorViewportClient::InputKey() [editorviewportclient.cpp:2452]
UE4Editor_UnrealEd!FLevelEditorViewportClient::InputKey() [leveleditorviewport.cpp:2585]
UE4Editor_Engine!FSceneViewport::OnMouseButtonDown() [sceneviewport.cpp:492]
UE4Editor_Slate!SViewport::OnMouseButtonDown() [sviewport.cpp:197]
UE4Editor_Slate!<lambda_7097b900f0e4be30d80fb18f98c51ea0>::operator() [slateapplication.cpp:5348]
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FBubblePolicy,FPointerEvent,<lambda_7097b900f0e4be30d80fb18f98c51ea0> >() [slateapplication.cpp:266]
UE4Editor_Slate!FSlateApplication::RoutePointerDownEvent() [slateapplication.cpp:5337]
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonDownEvent() [slateapplication.cpp:5290]
UE4Editor_Slate!FSlateApplication::OnMouseDown() [slateapplication.cpp:5208]
UE4Editor_ApplicationCore!FWindowsApplication::ProcessDeferredMessage() [windowsapplication.cpp:1734]
UE4Editor_ApplicationCore!FWindowsApplication::DeferMessage() [windowsapplication.cpp:2172]
UE4Editor_ApplicationCore!FWindowsApplication::ProcessMessage() [windowsapplication.cpp:889]
UE4Editor_ApplicationCore!FWindowsApplication::AppWndProc() [windowsapplication.cpp:726]
user32!UserCallWinProcCheckWow()
user32!DispatchMessageWorker()
UE4Editor_ApplicationCore!FWindowsPlatformApplicationMisc::PumpMessages() [windowsplatformapplicationmisc.cpp:129]
UE4Editor!FEngineLoop::Tick() [launchengineloop.cpp:3263]
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
ComponentTools - Landscape
Affects Versions4.19
Target Fix4.19.2
Fix Commit4005026
CreatedApr 11, 2018
ResolvedApr 16, 2018
UpdatedApr 18, 2018