Unreal Engine Issues

UE-104007

Crash editor when many sequencers are opened continuously

Crash editor when many sequencers are opened continuously

UDN
Description

Get crashed in editor when opening many sequencers using the EditorUtilityWidget,. It's not in UE4.25.3, but it crashes in UE4.25.4. And it only occurs when NVIDIA Aftermath (r.GPUCrashDebugging=1) is enabled. There is no crash when launching the editor on dX12.

 

Workaround:

・Revert changes in CL#14207464

・Uncheck "Enable vender specific GPU crash analysis tools" in project settings.

Steps to Reproduce
  1. Open attached project.
  2. Select and right click in "OpenLevelSeqWG" asset.
  3. Select "Run Editor Utility Widget".
  4. Press button, then start to open 200 sequencer assets.

Result:

Editor crash when opening around 147 sequencer or finish opening 200 sequencer.

Expected:

No crash occur.

Callstack
Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0xffffffffntdll
ntdll
nvwgf2umx
nvwgf2umx
nvwgf2umx
nvwgf2umx
nvwgf2umx
nvwgf2umx
nvwgf2umx
nvwgf2umx
kernel32
ntdll

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Won't Fix
ComponentUE - Graphics Features
Affects Versions4.25.4
CreatedDec 3, 2020
ResolvedMay 13, 2021
UpdatedJul 9, 2021
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