Description

REGRESSION: Yes, does not occur in 4.14.3

Crash occurs when the user drags an animation asset into a commented area in the Anim Graph.

This crash doesn't occur if the user right-clicks inside a commented area and adds an animation that way.

Steps to Reproduce
  1. Open Content Examples in editor.
  2. Open CurveAnimBlueprint_BoneScale.
  3. Open the Asset Browser.
  4. From the Asset Browser, drag an animation into one of the commented areas in the Anim Graph.

RESULT

Crash

Callstack
UE4Editor_AnimGraph!UClass::GetDefaultObject<UAnimGraphNode_Base>() class.h:2288 
UE4Editor_AnimGraph!UAnimationGraphSchema::GetAssetsNodeHoverMessage() animationgraphschema.cpp:373 
UE4Editor_GraphEditor!SGraphNode::OnDragOver() sgraphnode.cpp:295 
UE4Editor_Slate!<lambda_76908516b038c565f6664336590b056a>::operator() slateapplication.cpp:5351 
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FBubblePolicy,FPointerEvent,<lambda_76908516b038c565f6664336590b056a> >() slateapplication.cpp:238
UE4Editor_Slate!FSlateApplication::RoutePointerMoveEvent() slateapplication.cpp:5341 
UE4Editor_Slate!FSlateApplication::ProcessMouseMoveEvent() slateapplication.cpp:5729 
UE4Editor_Slate!FSlateApplication::OnMouseMove() slateapplication.cpp:5663 
UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() windowsapplication.cpp:1739 
UE4Editor_Core!FWindowsApplication::DeferMessage() windowsapplication.cpp:2120 
UE4Editor_Core!FWindowsApplication::ProcessMessage() windowsapplication.cpp:867 
UE4Editor_Core!FWindowsApplication::AppWndProc() windowsapplication.cpp:714 
user32!<Unknown> 
user32!<Unknown> 
UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() windowsplatformmisc.cpp:980 
UE4Editor!FEngineLoop::Tick() launchengineloop.cpp:2977 
UE4Editor!GuardedMain() launch.cpp:166 
UE4Editor!GuardedMainWrapper() launchwindows.cpp:134 
UE4Editor!WinMain() launchwindows.cpp:210 
UE4Editor!__scrt_common_main_seh() exe_common.inl:264 
kernel32!<Unknown> 
ntdll!<Unknown> 

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Fixed
ComponentAnim - Animation
Affects Versions4.15
Target Fix4.15
Fix Commit3299760
Main Commit3389599
Release Commit3299760
CreatedFeb 13, 2017
ResolvedFeb 13, 2017
UpdatedApr 27, 2018