Unreal Engine Issues and Bug Tracker (UE-45498)

Description

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

Callstack

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]
kernel32!BaseThreadInitThunk()
ntdll!RtlUserThreadStart()

Community References

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After I install the program,I open it,but it crashes.And sometimes it turns to the missing of the globalshader...SM4.bin

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Fixed

Component	UE - Anim - Sequencer
Affects Versions	4.16
Target Fix	4.16.1

Fix Commit	3464973

Created	May 30, 2017
Resolved	May 30, 2017
Updated	Apr 27, 2018

View Jira Issue

UE-45498

[CrashReport] UE4Editor_Sequencer!FSequencerEdMode::CleanUpMeshTrails() [sequenceredmode.cpp:186]

[CrashReport] UE4Editor_Sequencer!FSequencerEdMode::CleanUpMeshTrails() [sequenceredmode.cpp:186]

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