Description

This is a common crash occurring for users in 4.16. It is spread out among around 60 different CrashGroups in CrashReporter, because every case has a slightly different callstack.

This appears to have been experienced by QA during the 4.8 release (UE-12119 - Landscape garbage collection crash occurred after Force Deleting Map asset) but it was later unable to be reproduced.

Additional user information is not currently available.

Source Context

{
 1965       			StaticExec(RemainingWorld, *FString::Printf(TEXT("OBJ REFS CLASS=WORLD NAME=%s"), *RemainingWorld->GetPathName()));
 1966       
 1967       			TMap<UObject*, UProperty*>	Route		= FArchiveTraceRoute::FindShortestRootPath(RemainingWorld, true, GARBAGE_COLLECTION_KEEPFLAGS);
 1968       			FString						ErrorString	= FArchiveTraceRoute::PrintRootPath(Route, RemainingWorld);
 1969       
 1970 ***** 			UE_LOG(LogEditorServer, Fatal, TEXT("%s still around trying to load %s") LINE_TERMINATOR TEXT("%s"), *RemainingWorld->GetPathName(), TempFname, *ErrorString);
 1971       		}
 1972       	}
 1973       
 1974       
Steps to Reproduce

repro steps currently unknown.

Callstack
Fatal error: [File:D:\Build\++UE4+Release-4.16+Compile\Sync\Engine\Source\Editor\UnrealEd\Private\EditorServer.cpp] [Line: 1971]
 /Game/ThirdPersonBP/Maps/ThirdPersonExampleMap.ThirdPersonExampleMap still around trying to load 
D:/Projet Unreal Engine/Test/Content/ThirdPersonBP/Maps/ThirdPersonExampleMap.umap (Object is not currently rooted)

UE4Editor_UnrealEd!UEditorEngine::CheckForWorldGCLeaks() [editorserver.cpp:1971]
UE4Editor_UnrealEd!UEditorEngine::EditorDestroyWorld() [editorserver.cpp:2102]
UE4Editor_UnrealEd!UEditorEngine::NewMap() [editorserver.cpp:2234]
UE4Editor_UnrealEd!ReloadEditorWorldForReferenceReplacementIfNecessary() [objecttools.cpp:112]
UE4Editor_UnrealEd!ObjectTools::ForceDeleteObjects() [objecttools.cpp:2214]
UE4Editor_UnrealEd!FAssetDeleteModel::DoForceDelete() [assetdeletemodel.cpp:316]
UE4Editor_UnrealEd!SDeleteAssetsDialog::ForceDelete() [sdeleteassetsdialog.cpp:717]
UE4Editor_UnrealEd!TMemberFunctionCaller<SDeleteAssetsDialog,FReply() [delegateinstanceinterface.h:165]
UE4Editor_UnrealEd!UE4Tuple_Private::TTupleImpl<TIntegerSequence<unsigned int> >::ApplyAfter<TMemberFunctionCaller<SDeleteAssetsDialog,FReply() [tuple.h:497]
UE4Editor_UnrealEd!TBaseSPMethodDelegateInstance<0,SDeleteAssetsDialog,0,FReply __cdecl() [delegateinstancesimpl.h:327]
UE4Editor_Slate!TBaseDelegate<FReply>::Execute() [delegatesignatureimpl.inl:537]
UE4Editor_Slate!SButton::OnMouseButtonUp() [sbutton.cpp:278]
UE4Editor_Slate!<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1>::operator() [slateapplication.cpp:5049]
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1> >() [slateapplication.cpp:239]
UE4Editor_Slate!FSlateApplication::RoutePointerUpEvent() [slateapplication.cpp:5038]
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonUpEvent() [slateapplication.cpp:5515]
UE4Editor_Slate!FSlateApplication::OnMouseUp() [slateapplication.cpp:5495]
UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() [windowsapplication.cpp:1704]
UE4Editor_Core!FWindowsApplication::DeferMessage() [windowsapplication.cpp:2127]
UE4Editor_Core!FWindowsApplication::ProcessMessage() [windowsapplication.cpp:867]
UE4Editor_Core!FWindowsApplication::AppWndProc() [windowsapplication.cpp:714]
user32!UserCallWinProcCheckWow()
user32!DispatchMessageWorker()
UE4Editor_Core!FWindowsApplication::PumpMessages() [windowsapplication.cpp:2139]
UE4Editor_Slate!FSlateApplication::TickPlatform() [slateapplication.cpp:1570]
UE4Editor_Slate!FSlateApplication::AddModalWindow() [slateapplication.cpp:2048]
UE4Editor_UnrealEd!UEditorEngine::EditorAddModalWindow() [editorengine.cpp:3820]
UE4Editor_UnrealEd!ObjectTools::DeleteObjects() [objecttools.cpp:1827]
UE4Editor_ContentBrowser!ContentBrowserUtils::DeleteFolders() [contentbrowserutils.cpp:581]
UE4Editor_ContentBrowser!FAssetContextMenu::ExecuteDeleteFolderConfirmed() [assetcontextmenu.cpp:1917]
UE4Editor_ContentBrowser!TMemberFunctionCaller<FAssetContextMenu,FReply() [delegateinstanceinterface.h:165]
UE4Editor_ContentBrowser!UE4Tuple_Private::TTupleImpl<TIntegerSequence<unsigned int> >::ApplyAfter<TMemberFunctionCaller<FAssetContextMenu,FReply() [tuple.h:497]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,FAssetContextMenu,0,FReply __cdecl() [delegateinstancesimpl.h:327]
UE4Editor_ContentBrowser!TBaseDelegate<FReply>::Execute() [delegatesignatureimpl.inl:537]
UE4Editor_ContentBrowser!SContentBrowserConfirmPopup::YesClicked() [contentbrowserutils.cpp:248]
UE4Editor_ContentBrowser!TMemberFunctionCaller<SContentBrowserConfirmPopup,FReply() [delegateinstanceinterface.h:165]
UE4Editor_ContentBrowser!UE4Tuple_Private::TTupleImpl<TIntegerSequence<unsigned int> >::ApplyAfter<TMemberFunctionCaller<SContentBrowserConfirmPopup,FReply() [tuple.h:497]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SContentBrowserConfirmPopup,0,FReply __cdecl() [delegateinstancesimpl.h:327]
UE4Editor_Slate!TBaseDelegate<FReply>::Execute() [delegatesignatureimpl.inl:537]
UE4Editor_Slate!SButton::OnMouseButtonUp() [sbutton.cpp:278]
UE4Editor_Slate!<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1>::operator() [slateapplication.cpp:5049]
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1> >() [slateapplication.cpp:239]
UE4Editor_Slate!FSlateApplication::RoutePointerUpEvent() [slateapplication.cpp:5038]
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonUpEvent() [slateapplication.cpp:5515]
UE4Editor_Slate!FSlateApplication::OnMouseUp() [slateapplication.cpp:5495]
UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() [windowsapplication.cpp:1704]
UE4Editor_Core!FWindowsApplication::DeferMessage() [windowsapplication.cpp:2127]
UE4Editor_Core!FWindowsApplication::ProcessMessage() [windowsapplication.cpp:867]
UE4Editor_Core!FWindowsApplication::AppWndProc() [windowsapplication.cpp:714]
user32!UserCallWinProcCheckWow()
user32!DispatchMessageWorker()
UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() [windowsplatformmisc.cpp:1009]
UE4Editor!FEngineLoop::Tick() [launchengineloop.cpp:3058]
UE4Editor!GuardedMain() [launch.cpp:166]
UE4Editor!GuardedMainWrapper() [launchwindows.cpp:134]
UE4Editor!WinMain() [launchwindows.cpp:210]
UE4Editor!__scrt_common_main_seh() [exe_common.inl:253]
kernel32!BaseThreadInitThunk()
ntdll!RtlUserThreadStart()

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Fixed
ComponentCore - UObject
Affects Versions4.164.214.22
Target Fix4.23
Fix Commit5371058
Main Commit6835252
CreatedJun 29, 2017
ResolvedMar 12, 2019
UpdatedJan 7, 2020