A crash occurs when attempting to transform a landscape spline with a Level sequence open.
It is important to note that no key framing or animating of the landscape spline control point is occurring, and it is simply just having the level sequence window open and transforming the points causes a crash.
1. Open attached project.
2. Create new Level Sequence and keep it open.
3. Open the Landscape modes tab and select the 'Edit Splines' option.
4. Select one of the spline control points and move them around the scene.
Outcome A crash occurs when moving a Landscape spline control point with a Level Sequence open.
Expected No crash occurs and you can freely move the landscape control points.
Access violation - code c0000005 (first/second chance not available) UE4Editor_Core!FTransform::GetRelativeTransform() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\core\private\math\transformvectorized.cpp:196] UE4Editor_Landscape!ULandscapeSplineSegment::UpdateSplinePoints() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\landscape\private\landscapesplines.cpp:2312] UE4Editor_Landscape!ULandscapeSplineControlPoint::UpdateSplinePoints() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\landscape\private\landscapesplines.cpp:1613] UE4Editor_LandscapeEditor!FLandscapeToolSplines::InputDelta() [d:\build\++ue4+release-4.14+compile\sync\engine\source\editor\landscapeeditor\private\landscapeedmodesplinetools.cpp:1319] UE4Editor_LandscapeEditor!FEdModeLandscape::InputDelta() [d:\build\++ue4+release-4.14+compile\sync\engine\source\editor\landscapeeditor\private\landscapeedmode.cpp:1640] UE4Editor_UnrealEd!FEditorModeTools::InputDelta() [d:\build\++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\editormodemanager.cpp:690] UE4Editor_UnrealEd!FEditorViewportClient::InputWidgetDelta() [d:\build\++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\editorviewportclient.cpp:3031] UE4Editor_UnrealEd!FLevelEditorViewportClient::InputWidgetDelta() [d:\build\++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\leveleditorviewport.cpp:2275] UE4Editor_UnrealEd!FEditorViewportClient::UpdateMouseDelta() [d:\build\++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\editorviewportclient.cpp:2003] UE4Editor_UnrealEd!FEditorViewportClient::Tick() [d:\build\++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\editorviewportclient.cpp:1101] UE4Editor_UnrealEd!FLevelEditorViewportClient::Tick() [d:\build\++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\leveleditorviewport.cpp:2036] UE4Editor_UnrealEd!UEditorEngine::Tick() [d:\build\++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\editorengine.cpp:1490] UE4Editor_UnrealEd!UUnrealEdEngine::Tick() [d:\build\++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\unrealedengine.cpp:371] UE4Editor!FEngineLoop::Tick() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\launch\private\launchengineloop.cpp:2859] UE4Editor!GuardedMain() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\launch\private\launch.cpp:152] UE4Editor!GuardedMainWrapper() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:126] UE4Editor!WinMain() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:202] UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:264] kernel32 ntdll
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