This is a top crash occurring in the 4.16 release. Despite the callstack occurring in Sequencer, many users are experiencing this crash while working in UMG.

User Descriptions

  • scaling track in widget anim
  • while following the new Udemy course (pinball, college 40) I tried to add a track to my main menu animation.
  • I don't actually know. I was playing around in the UMG editor, went to add an animation to one of my buttons and it crashed. I don't know what animation I wanted to add, I was merely curious to see what the feature did.
Steps to Reproduce

repro steps currently unknown

Access violation - code c0000005 (first/second chance not available)

UE4Editor_Sequencer!FSequencerEdMode::CleanUpMeshTrails() [sequenceredmode.cpp:186]
UE4Editor_Sequencer!FSequencer::OnSelectedOutlinerNodesChanged() [sequencer.cpp:3886]
UE4Editor_Sequencer!TBaseRawMethodDelegateInstance<0,FSequencer,void __cdecl() [delegateinstancesimpl.h:648]
UE4Editor_Sequencer!TBaseMulticastDelegate<void>::Broadcast() [delegatesignatureimpl.inl:937]
UE4Editor_Sequencer!FSequencer::Tick() [sequencer.cpp:362]
UE4Editor_UnrealEd!FTickableEditorObject::TickObjects() [tickableeditorobject.h:21]
UE4Editor_UnrealEd!UEditorEngine::Tick() [editorengine.cpp:1400]
UE4Editor_UnrealEd!UUnrealEdEngine::Tick() [unrealedengine.cpp:386]
UE4Editor!FEngineLoop::Tick() [launchengineloop.cpp:3119]
UE4Editor!GuardedMain() [launch.cpp:166]
UE4Editor!GuardedMainWrapper() [launchwindows.cpp:134]
UE4Editor!WinMain() [launchwindows.cpp:210]
UE4Editor!__scrt_common_main_seh() [exe_common.inl:264]

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ComponentUE - Anim - Sequencer
Affects Versions4.16
Target Fix4.16.1
Fix Commit3464973
CreatedMay 30, 2017
ResolvedMay 30, 2017
UpdatedApr 27, 2018