Crash occurs when the user sets Anim Class in a Skeletal Mesh Component to an animation blueprint with a Sub Anim Instance node.
Test asset for this crash submitting in CL 3075384 in Release-4.13
RESULT:
Crash.
UE4Editor_Engine!UAnimInstance::UpdateAnimation() animinstance.cpp:348 UE4Editor_Engine!USkeletalMeshComponent::TickAnimation() skeletalmeshcomponent.cpp:630 UE4Editor_Engine!USkeletalMeshComponent::InitAnim() skeletalmeshcomponent.cpp:420 UE4Editor_Engine!USkeletalMeshComponent::OnRegister() skeletalmeshcomponent.cpp:338 UE4Editor_Engine!UActorComponent::ExecuteRegisterEvents() actorcomponent.cpp:1144 UE4Editor_Engine!UActorComponent::RegisterComponentWithWorld() actorcomponent.cpp:877 UE4Editor_Engine!AActor::IncrementalRegisterComponents() actor.cpp:4004 UE4Editor_Engine!AActor::RegisterAllComponents() actor.cpp:3906 UE4Editor_UnrealEd!FBlueprintCompileReinstancer::ReplaceInstancesOfClass_Inner() kismetreinstanceutilities.cpp:1503 UE4Editor_UnrealEd!FBlueprintCompileReinstancer::ReplaceInstancesOfClass() kismetreinstanceutilities.cpp:1305 UE4Editor_UnrealEd!FBlueprintCompileReinstancer::ReinstanceInner() kismetreinstanceutilities.cpp:599 UE4Editor_UnrealEd!FBlueprintCompileReinstancer::ReinstanceObjects() kismetreinstanceutilities.cpp:761 UE4Editor_UnrealEd!FKismetEditorUtilities::CompileBlueprint() kismet2.cpp:793 UE4Editor_Kismet!FBlueprintEditor::Compile() blueprinteditor.cpp:3213 UE4Editor_Kismet!TBaseSPMethodDelegateInstance<0,FBlueprintEditor,0,TTypeWrapper<void> __cdecl() delegateinstancesimpl.h:317 UE4Editor_Kismet!TBaseSPMethodDelegateInstance<0,FBlueprintEditor,0,void __cdecl() delegateinstancesimpl.h:423 UE4Editor_Slate!FUICommandList::ExecuteAction() uicommandlist.cpp:92 UE4Editor_Slate!SToolBarButtonBlock::OnClicked() stoolbarbuttonblock.cpp:300 UE4Editor_Slate!TMemberFunctionCaller<SToolBarButtonBlock,FReply() delegateinstanceinterface.h:161 UE4Editor_Slate!TTupleImpl<TIntegerSequence<unsigned int> >::ApplyAfter<TMemberFunctionCaller<SToolBarButtonBlock,FReply() tuple.h:115 UE4Editor_Slate!TBaseSPMethodDelegateInstance<0,SToolBarButtonBlock,0,FReply __cdecl() delegateinstancesimpl.h:317 UE4Editor_Slate!TBaseDelegate<FReply>::Execute() delegatesignatureimpl.inl:521 UE4Editor_Slate!SButton::OnMouseButtonUp() sbutton.cpp:278 UE4Editor_Slate!<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1>::operator() slateapplication.cpp:4901 UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1> >() slateapplication.cpp:215 UE4Editor_Slate!FSlateApplication::RoutePointerUpEvent() slateapplication.cpp:4890 UE4Editor_Slate!FSlateApplication::ProcessMouseButtonUpEvent() slateapplication.cpp:5348 UE4Editor_Slate!FSlateApplication::OnMouseUp() slateapplication.cpp:5328 UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() windowsapplication.cpp:1584 UE4Editor_Core!FWindowsApplication::DeferMessage() windowsapplication.cpp:1930 UE4Editor_Core!FWindowsApplication::ProcessMessage() windowsapplication.cpp:747 UE4Editor_Core!FWindowsApplication::AppWndProc() windowsapplication.cpp:669 user32!<Unknown> user32!<Unknown> UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() windowsplatformmisc.cpp:905 UE4Editor!FEngineLoop::Tick() launchengineloop.cpp:2788 UE4Editor!GuardedMain() launch.cpp:156 UE4Editor!GuardedMainWrapper() launchwindows.cpp:126 UE4Editor!WinMain() launchwindows.cpp:202 UE4Editor!__scrt_common_main_seh() exe_common.inl:264 kernel32!<Unknown> ntdll!<Unknown>
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