Landscape Visibility Tool crashes editor

Editor crashes when landscape visibility tool is used on landscape.

Frequency: 2/2

Crash Reporter:

[Link Removed]

1. download project at attached link:

[Link Removed]

2. Unzip and open project
3. Switch to landscape>sculpt mode
4. Click the scuplt dropdown menu>Visibility
5. LMB on landscape in viewport to paint hole material

Fatal error!

Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x00000054

UE4Editor-Landscape.dll!FLandscapeEditDataInterface::SetAlphaData() (0x000007fed86dfe45) + 101 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\landscape\private\landscapeeditinterface.cpp:2243]
UE4Editor-LandscapeEditor.dll!FAlphamapAccessor<0,0>::SetData() (0x000007fecd539d93) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\landscapeeditor\private\landscapeedmodetools.h:950]
UE4Editor-LandscapeEditor.dll!FLandscapeToolStrokeVisibility::Apply() (0x000007fecd482a69) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\landscapeeditor\private\landscapeedmodecomponenttools.cpp:265]
UE4Editor-LandscapeEditor.dll!FLandscapeToolBase<FLandscapeToolStrokeVisibility>::BeginTool() (0x000007fecd489788) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\landscapeeditor\private\landscapeedmodetools.h:1295]
UE4Editor-LandscapeEditor.dll!FEdModeLandscape::InputKey() (0x000007fecd4fe6f1) + 27 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\landscapeeditor\private\landscapeedmode.cpp:1200]
UE4Editor-UnrealEd.dll!FEditorModeTools::InputKey() (0x000007feda795de9) + 102 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\editormodemanager.cpp:658]
UE4Editor-UnrealEd.dll!FEditorViewportClient::InputKey() (0x000007feda795e9f) + 46 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\editorviewportclient.cpp:1870]
UE4Editor-UnrealEd.dll!FLevelEditorViewportClient::InputKey() (0x000007feda803493) + 61 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\leveleditorviewport.cpp:2367]
UE4Editor-Engine.dll!FSceneViewport::OnMouseButtonDown() (0x000007feddb142f9) + 70 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\slate\sceneviewport.cpp:371]
UE4Editor-Slate.dll!SViewport::OnMouseButtonDown() (0x000007fedc58ec9b) + 126 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\slate\private\widgets\sviewport.cpp:150]
UE4Editor-Slate.dll!<lambda_2944fcd867c13fce09ac1f6fe9cbe583>::operator()() (0x000007fedc46ce16) + 24 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:3818]
UE4Editor-Slate.dll!FEventRouter::Route<FReply,FEventRouter::FBubblePolicy,FPointerEvent,<lambda_2944fcd867c13fce09ac1f6fe9cbe583> >() (0x000007fedc427586) + 47 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:202]
UE4Editor-Slate.dll!FSlateApplication::ProcessMouseButtonDownEvent() (0x000007fedc4d4a3b) + 96 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:3822]
UE4Editor-Slate.dll!FSlateApplication::OnMouseDown() (0x000007fedc4c43cb) + 19 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:3732]
UE4Editor-Core.dll!FWindowsApplication::ProcessDeferredMessage() (0x000007fedfae374e) + 32 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsapplication.cpp:1311]
UE4Editor-Core.dll!FWindowsApplication::DeferMessage() (0x000007fedfad5cbe) + 74 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsapplication.cpp:1669]
UE4Editor-Core.dll!FWindowsApplication::ProcessMessage() (0x000007fedfae4ce0) + 41 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsapplication.cpp:742]
UE4Editor-Core.dll!FWindowsApplication::AppWndProc() (0x000007fedfad3122) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsapplication.cpp:604]
USER32.dll!UnknownFunction (0x0000000076d49bd1) + 0 bytes [UnknownFile:0]
USER32.dll!UnknownFunction (0x0000000076d498da) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!FWindowsPlatformMisc::PumpMessages() (0x000007fedfb83e56) + 48 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsplatformmisc.cpp:774]
UE4Editor.exe!FEngineLoop::Tick() (0x000000013ffc00a9) + 8 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launchengineloop.cpp:2233]
UE4Editor.exe!GuardedMain() (0x000000013ffb267c) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launch.cpp:142]
UE4Editor.exe!GuardedMainWrapper() (0x000000013ffb26ea) + 5 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor.exe!WinMain() (0x000000013ffc2219) + 17 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\windows\launchwindows.cpp:202]
UE4Editor.exe!__tmainCRTStartup() (0x000000013ffc3159) + 21 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]
kernel32.dll!UnknownFunction (0x0000000076e459ed) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x0000000076f7c541) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x0000000076f7c541) + 0 bytes [UnknownFile:0]