Automatic Animation Compression Results in Crash

Using the "Automatic" option to compress animation results in crash 100% in UE4.10 but does not occur in UE4.9.2. *Regression

1. In UE4.10, Open new Third Person Project
2. Open any animation in Persona
3. Select Compress animation from menu, using "Automatic" option
RESULT: Crashes 4/4
EXPECTATION: Animation to compress without crash
NOTE: This does not occur in UE4.9.2

UE4Editor_Engine!FAnimationUtils::CompressAnimSequenceExplicit() animationutils.cpp:1268
UE4Editor_Engine!UAnimCompress_Automatic::DoReduction() animcompress_automatic.cpp:37
UE4Editor_Engine!UAnimCompress::Reduce() animcompress.cpp:661
UE4Editor_UnrealEd!SAnimationCompressionPanel::ApplyAlgorithm() animationcompressionpanel.cpp:147
UE4Editor_UnrealEd!SAnimationCompressionPanel::ApplyClicked() animationcompressionpanel.cpp:124
UE4Editor_UnrealEd!TMemberFunctionCaller<SAnimationCompressionPanel,FReply() delegateinstanceinterface_variadics.h:161
UE4Editor_UnrealEd!TTupleImpl<TIntegerSequence<> >::ApplyAfter_ExplicitReturnType<FReply,TMemberFunctionCaller<SAnimationCompressionPanel,FReply() tuple.h:113
UE4Editor_UnrealEd!TBaseSPMethodDelegateInstance<0,SAnimationCompressionPanel,0,FReply __cdecl() delegateinstancesimpl_variadics.inl:282
UE4Editor_Slate!TBaseDelegate<FReply>::Execute() delegatesignatureimpl_variadics.inl:440
UE4Editor_Slate!SButton::OnMouseButtonUp() sbutton.cpp:236
UE4Editor_Slate!<lambda_3af631073fdb7142ab8125c5bec7e7c3>::operator() slateapplication.cpp:4276
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_3af631073fdb7142ab8125c5bec7e7c3> >() slateapplication.cpp:214
UE4Editor_Slate!FSlateApplication::RoutePointerUpEvent() slateapplication.cpp:4279
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonUpEvent() slateapplication.cpp:4663
UE4Editor_Slate!FSlateApplication::OnMouseUp() slateapplication.cpp:4641
UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() windowsapplication.cpp:1404
UE4Editor_Core!FWindowsApplication::DeferMessage() windowsapplication.cpp:1709
UE4Editor_Core!FWindowsApplication::ProcessMessage() windowsapplication.cpp:707
UE4Editor_Core!FWindowsApplication::AppWndProc() windowsapplication.cpp:629
user32!<Unknown>
user32!<Unknown>
UE4Editor_Core!FWindowsApplication::PumpMessages() windowsapplication.cpp:1721
UE4Editor_Slate!FSlateApplication::Tick() slateapplication.cpp:1296
UE4Editor_Slate!FSlateApplication::AddModalWindow() slateapplication.cpp:1726
UE4Editor_UnrealEd!UEditorEngine::EditorAddModalWindow() editorengine.cpp:3421
UE4Editor_UnrealEd!FDlgAnimCompression::ShowModal() animationcompressionpanel.cpp:38
UE4Editor_Persona!FPersona::OnApplyCompression() persona.cpp:2708
UE4Editor_Persona!TBaseSPMethodDelegateInstance<0,FPersona,0,TTypeWrapper<void> __cdecl() delegateinstancesimpl_variadics.inl:282
UE4Editor_Persona!TBaseSPMethodDelegateInstance<0,FPersona,0,void __cdecl() delegateinstancesimpl_variadics.inl:388
UE4Editor_Slate!FUICommandList::ExecuteAction() uicommandlist.cpp:87
UE4Editor_Slate!SToolBarButtonBlock::OnClicked() stoolbarbuttonblock.cpp:296
UE4Editor_Slate!TMemberFunctionCaller<SToolBarButtonBlock,FReply() delegateinstanceinterface_variadics.h:161
UE4Editor_Slate!TTupleImpl<TIntegerSequence<> >::ApplyAfter_ExplicitReturnType<FReply,TMemberFunctionCaller<SToolBarButtonBlock,FReply() tuple.h:113
UE4Editor_Slate!TBaseSPMethodDelegateInstance<0,SToolBarButtonBlock,0,FReply __cdecl() delegateinstancesimpl_variadics.inl:282
UE4Editor_Slate!TBaseDelegate<FReply>::Execute() delegatesignatureimpl_variadics.inl:440
UE4Editor_Slate!SButton::OnMouseButtonUp() sbutton.cpp:236
UE4Editor_Slate!<lambda_3af631073fdb7142ab8125c5bec7e7c3>::operator() slateapplication.cpp:4276
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_3af631073fdb7142ab8125c5bec7e7c3> >() slateapplication.cpp:214
UE4Editor_Slate!FSlateApplication::RoutePointerUpEvent() slateapplication.cpp:4279
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonUpEvent() slateapplication.cpp:4663
UE4Editor_Slate!FSlateApplication::OnMouseUp() slateapplication.cpp:4641
UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() windowsapplication.cpp:1404
UE4Editor_Core!FWindowsApplication::DeferMessage() windowsapplication.cpp:1709
UE4Editor_Core!FWindowsApplication::ProcessMessage() windowsapplication.cpp:707
UE4Editor_Core!FWindowsApplication::AppWndProc() windowsapplication.cpp:629
user32!<Unknown>
user32!<Unknown>
UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() windowsplatformmisc.cpp:884
UE4Editor!FEngineLoop::Tick() launchengineloop.cpp:2391
UE4Editor!GuardedMain() launch.cpp:142
UE4Editor!GuardedMainWrapper() launchwindows.cpp:126
UE4Editor!WinMain() launchwindows.cpp:200