Unreal Engine Issues and Bug Tracker (UE-46056)

Description

If three or more actors are saved to a level with the same name in the Content Browser of "none", attempting to load the level (open or right click on umap asset in content browser) causes the editor to crash.

Note:
If only two actors are given the name "none" and saved, the level will open but only one actor will be present. The editor appears to delete/remove the second.

Regression:
No - same behavior occurs in 4.15.3

Steps to Reproduce

Open UE4 Editor (any proect)
Create/open a new level
From Modes tab, add three Empty Actors
Using the Details panel, rename all three actors to "none" (without quotes)
Save the level
Open a different level then reopen the level with the empty actors

Result:
Editor crashes when attempting to load the level.

Expected:
Level loads with "none" actors (possibly with ensure) or Editor warns when naming an actor "none"

Callstack

LoginId:7156c35640f86204e61b8383f45dee17
EpicAccountId:e8c7fa630b6440f69a25a2c64d6c482c

Assertion failed: !Obj->HasAnyFlags(RF_NeedLoad|RF_NeedPostLoad|RF_ClassDefaultObject) || bIsOwnedByCDO [File:D:\Workspaces\DWilson_Main\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp] [Line: 2341] 
Attempting to replace an object that hasn't been fully loaded: SceneComponent /Game/ThirdPersonBP/Maps/NewWorld.DefaultSceneRoot (Outer=Package /Game/ThirdPersonBP/Maps/NewWorld, Flags=0x00083408)


UE4Editor_Core!FDebug::AssertFailed() [d:\workspaces\dwilson_main\engine\source\runtime\core\private\misc\assertionmacros.cpp:349]
UE4Editor_CoreUObject!StaticAllocateObject() [d:\workspaces\dwilson_main\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:2337]
UE4Editor_CoreUObject!StaticConstructObject_Internal() [d:\workspaces\dwilson_main\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:3114]
UE4Editor_CoreUObject!FLinkerLoad::CreateExport() [d:\workspaces\dwilson_main\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3840]
UE4Editor_CoreUObject!FLinkerLoad::CreateExportAndPreload() [d:\workspaces\dwilson_main\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2698]
UE4Editor_CoreUObject!FLinkerLoad::LoadAllObjects() [d:\workspaces\dwilson_main\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2845]
UE4Editor_CoreUObject!LoadPackageInternal() [d:\workspaces\dwilson_main\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1307]
UE4Editor_CoreUObject!LoadPackage() [d:\workspaces\dwilson_main\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1404]
UE4Editor_CoreUObject!ResolveName() [d:\workspaces\dwilson_main\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:780]
UE4Editor_CoreUObject!StaticLoadObjectInternal() [d:\workspaces\dwilson_main\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:867]
UE4Editor_CoreUObject!StaticLoadObject() [d:\workspaces\dwilson_main\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:931]
UE4Editor_ContentBrowser!FAssetData::GetAsset() [d:\workspaces\dwilson_main\engine\source\runtime\assetregistry\public\assetdata.h:264]
UE4Editor_ContentBrowser!SContentBrowser::OnAssetsActivated() [d:\workspaces\dwilson_main\engine\source\editor\contentbrowser\private\scontentbrowser.cpp:1912]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SContentBrowser,0,TTypeWrapper<void> __cdecl(TArray<FAssetData,FDefaultAllocator> const & __ptr64,enum EAssetTypeActivationMethod::Type)>::Execute() [d:\workspaces\dwilson_main\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:327]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SContentBrowser,0,void __cdecl(TArray<FAssetData,FDefaultAllocator> const & __ptr64,enum EAssetTypeActivationMethod::Type)>::ExecuteIfSafe() [d:\workspaces\dwilson_main\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:434]
UE4Editor_ContentBrowser!TBaseDelegate<void,TArray<FAssetData,FDefaultAllocator> const & __ptr64,enum EAssetTypeActivationMethod::Type>::ExecuteIfBound() [d:\workspaces\dwilson_main\engine\source\runtime\core\public\delegates\delegatesignatureimpl.inl:624]
UE4Editor_ContentBrowser!SAssetView::OnListMouseButtonDoubleClick() [d:\workspaces\dwilson_main\engine\source\editor\contentbrowser\private\sassetview.cpp:3870]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SAssetView,0,TTypeWrapper<void> __cdecl(TSharedPtr<FAssetViewItem,0>)>::Execute() [d:\workspaces\dwilson_main\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:327]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SAssetView,0,void __cdecl(TSharedPtr<FAssetViewItem,0>)>::ExecuteIfSafe() [d:\workspaces\dwilson_main\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:434]
UE4Editor_ContentBrowser!TBaseDelegate<void,TSharedPtr<FAssetViewItem,0> >::ExecuteIfBound() [d:\workspaces\dwilson_main\engine\source\runtime\core\public\delegates\delegatesignatureimpl.inl:624]
UE4Editor_ContentBrowser!SListView<TSharedPtr<FAssetViewItem,0> >::Private_OnItemDoubleClicked() [d:\workspaces\dwilson_main\engine\source\runtime\slate\public\widgets\views\slistview.h:815]
UE4Editor_ContentBrowser!STableRow<TSharedPtr<FAssetViewItem,0> >::OnMouseButtonDoubleClick() [d:\workspaces\dwilson_main\engine\source\runtime\slate\public\widgets\views\stablerow.h:290]
UE4Editor_Slate!<lambda_eeb33fd1b480e3cad58a1531d90d2e14>::operator()() [d:\workspaces\dwilson_main\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5633]
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FBubblePolicy,FPointerEvent,<lambda_eeb33fd1b480e3cad58a1531d90d2e14> >() [d:\workspaces\dwilson_main\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:239]
UE4Editor_Slate!FSlateApplication::RoutePointerDoubleClickEvent() [d:\workspaces\dwilson_main\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5631]
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonDoubleClickEvent() [d:\workspaces\dwilson_main\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5618]
UE4Editor_Slate!FSlateApplication::OnMouseDoubleClick() [d:\workspaces\dwilson_main\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5594]
UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() [d:\workspaces\dwilson_main\engine\source\runtime\core\private\windows\windowsapplication.cpp:1703]
UE4Editor_Core!FWindowsApplication::DeferMessage() [d:\workspaces\dwilson_main\engine\source\runtime\core\private\windows\windowsapplication.cpp:2122]
UE4Editor_Core!FWindowsApplication::ProcessMessage() [d:\workspaces\dwilson_main\engine\source\runtime\core\private\windows\windowsapplication.cpp:862]
UE4Editor_Core!FWindowsApplication::AppWndProc() [d:\workspaces\dwilson_main\engine\source\runtime\core\private\windows\windowsapplication.cpp:709]
user32
user32
UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() [d:\workspaces\dwilson_main\engine\source\runtime\core\private\windows\windowsplatformmisc.cpp:1009]
UE4Editor!FEngineLoop::Tick() [d:\workspaces\dwilson_main\engine\source\runtime\launch\private\launchengineloop.cpp:3097]
UE4Editor!GuardedMain() [d:\workspaces\dwilson_main\engine\source\runtime\launch\private\launch.cpp:166]
UE4Editor!GuardedMainWrapper() [d:\workspaces\dwilson_main\engine\source\runtime\launch\private\windows\launchwindows.cpp:134]
UE4Editor!WinMain() [d:\workspaces\dwilson_main\engine\source\runtime\launch\private\windows\launchwindows.cpp:210]
UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:264]
kernel32
ntdll

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Fixed

Component	Tools
Affects Versions	4.15.3, 4.16.1, 4.17
Target Fix	4.17

Fix Commit	3551144
Main Commit	3596628
Release Commit	3551144

Created	Jun 14, 2017
Resolved	Jul 24, 2017
Updated	Apr 27, 2018

View Jira Issue

UE-46056

Editor crash on level load with multiple actors with the name "(none)"

Editor crash on level load with multiple actors with the name "(none)"

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