Developer Notes

This issue is not fixed in 4.17, but should provide better information to help identify the cause.

Description

This is a top crash occurring for users in the 4.14 and 4.15 releases. Unfortunately no user-descriptions of the issue have been provided, so information is limited.

Despite a different callstack, this issue bears resemblance to UE-38225

Steps to Reproduce

repro steps unknown

Callstack

Assertion failed: IsValidIndex(Index) && ChunkIndex < NumChunks && Index < MaxTotalElements [Link Removed] [Line: 354]

UE4Editor_Core!FName::GetDisplayNameEntry() [unrealnames.cpp:895]
UE4Editor_Core!FName::ToString() [unrealnames.cpp:901]
UE4Editor_UnrealEd!UCookOnTheFlyServer::Cache() [cookontheflyserver.cpp:708]
UE4Editor_UnrealEd!UCookOnTheFlyServer::TickCookOnTheSide() [cookontheflyserver.cpp:1918]
UE4Editor_UnrealEd!UCookOnTheFlyServer::Tick() [cookontheflyserver.cpp:805]
UE4Editor_UnrealEd!FTickableEditorObject::TickObjects() [tickableeditorobject.h:21]
UE4Editor_UnrealEd!UEditorEngine::Tick() [editorengine.cpp:1397]
UE4Editor_UnrealEd!UUnrealEdEngine::Tick() [unrealedengine.cpp:391]
UE4Editor!FEngineLoop::Tick() [launchengineloop.cpp:3025]
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()

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Fixed
ComponentCore
Affects Versions4.144.15
Target Fix4.17
Fix Commit3433049
Main Commit3492074
CreatedApr 25, 2017
ResolvedMay 10, 2017
UpdatedJun 19, 2017