Unreal Engine Issues and Bug Tracker (UE-52373)

Description

I have attached the project I used to repro this as well. All you should need to do is reimport twice on the untitled skeletal mesh and it should crash

Steps to Reproduce

Open up any project in the editor
Import attached .fbx as skeletal mesh with default settings
In the content browser right click on the skeletal mesh and select Import LOD -> LOD(n)
Select the attached .fbx as the LOD import file
Repeat previous 2 steps for importing LOD's until you have ~ 8 LODs
Right click on the skeletal mesh and select Import LOD -> LOD0
Repeat previous step noticing that the amount of LODs is now multiplying
Once you have ~ 150-200 LODs right click on the skeletal mesh and select Reimport
Right click and Reimport again

Result: Crash.
Freq: 5/5

Callstack

UE4Editor_D3D11RHI!FD3D11DynamicRHI::RHICreateVertexBuffer() d3d11vertexbuffer.cpp:67 
UE4Editor_RHI!FDynamicRHI::CreateVertexBuffer_RenderThread() rhicommandlist.cpp:1962 
UE4Editor_RHI!FRHICommandListImmediate::CreateVertexBuffer() rhicommandlist.h:3692 
UE4Editor_Engine!RHICreateVertexBuffer() rhicommandlist.h:4544 
UE4Editor_Engine!FSkinWeightVertexBuffer::InitRHI() skinweightvertexbuffer.cpp:131 
UE4Editor_RenderCore!FRenderResource::InitResource() renderresource.cpp:33 
UE4Editor_RenderCore!TGraphTask<`BeginInitResource'::`2'::EURCMacro_InitCommand>::ExecuteTask() taskgraphinterfaces.h:784 
UE4Editor_Core!FNamedTaskThread::ProcessTasksNamedThread() taskgraph.cpp:651 
UE4Editor_Core!FNamedTaskThread::ProcessTasksUntilQuit() taskgraph.cpp:560 
UE4Editor_RenderCore!RenderingThreadMain() renderingthread.cpp:327 
UE4Editor_RenderCore!FRenderingThread::Run() renderingthread.cpp:461 
UE4Editor_Core!FRunnableThreadWin::Run() windowsrunnablethread.cpp:76

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Fixed

Component	Tools
Affects Versions	4.18
Target Fix	4.19

Fix Commit	3780840
Main Commit	3807911
Release Commit	3813083

Created	Nov 14, 2017
Resolved	Nov 30, 2017
Updated	Apr 27, 2018

UE-52373

Crash reimporting Skeletal Mesh that has an extremely high amount of LODs

Crash reimporting Skeletal Mesh that has an extremely high amount of LODs

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