Navigating to a level with a skeletal mesh asset from that level copied to the clipbard from the world outliner will cause the editor to crash. This can currently only be reproduced in the TM-ContactShadows map in //UE4/Release-4.13 by copying one or all of the cloth skeletal meshes in that level, opening another level then opening the contact shadows map again. The cloth assets are not checked into main branch yet, but the issue does occur there as well. Copying other meshes from that level like the demo displays does not cause a crash. Another user is seeing this same callstack when closing the level but I havent been able to repro that way.
Result:
Observe a crash as the level is loaded
[2016.07.28-14.27.02:033][595]LogWindows:Error: === Critical error: === [2016.07.28-14.27.02:033][595]LogWindows:Error: [2016.07.28-14.27.02:034][595]LogWindows:Error: Fatal error! [2016.07.28-14.27.02:034][595]LogWindows:Error: [2016.07.28-14.27.02:035][595]LogWindows:Error: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0xffffffff [2016.07.28-14.27.02:035][595]LogWindows:Error: [2016.07.28-14.27.02:035][595]LogWindows:Error: UE4Editor-CoreUObject.dll!UObjectBaseUtility::GetFullName() [d:\main\main_stream\engine\source\runtime\coreuobject\private\uobject\uobjectbaseutility.cpp:78] [2016.07.28-14.27.02:036][595]LogWindows:Error: UE4Editor-CoreUObject.dll!FLazyObjectPtr::PossiblySerializeObjectGuid() [d:\main\main_stream\engine\source\runtime\coreuobject\private\uobject\lazyobjectptr.cpp:139] [2016.07.28-14.27.02:036][595]LogWindows:Error: UE4Editor-CoreUObject.dll!UObject::Serialize() [d:\main\main_stream\engine\source\runtime\coreuobject\private\uobject\obj.cpp:1043] [2016.07.28-14.27.02:036][595]LogWindows:Error: UE4Editor-Engine.dll!UActorComponent::Serialize() [d:\main\main_stream\engine\source\runtime\engine\private\components\actorcomponent.cpp:1646] [2016.07.28-14.27.02:037][595]LogWindows:Error: UE4Editor-Engine.dll!USceneComponent::Serialize() [d:\main\main_stream\engine\source\runtime\engine\private\components\scenecomponent.cpp:2019] [2016.07.28-14.27.02:037][595]LogWindows:Error: UE4Editor-Engine.dll!UPrimitiveComponent::Serialize() [d:\main\main_stream\engine\source\runtime\engine\private\components\primitivecomponent.cpp:641] [2016.07.28-14.27.02:038][595]LogWindows:Error: UE4Editor-Engine.dll!USkinnedMeshComponent::Serialize() [d:\main\main_stream\engine\source\runtime\engine\private\skeletalmesh.cpp:5525] [2016.07.28-14.27.02:038][595]LogWindows:Error: UE4Editor-Engine.dll!USkeletalMeshComponent::Serialize() [d:\main\main_stream\engine\source\runtime\engine\private\skeletalmesh.cpp:5550] [2016.07.28-14.27.02:038][595]LogWindows:Error: UE4Editor-CoreUObject.dll!FLinkerLoad::Preload() [d:\main\main_stream\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3409] [2016.07.28-14.27.02:039][595]LogWindows:Error: UE4Editor-CoreUObject.dll!EndLoad() [d:\main\main_stream\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1512] [2016.07.28-14.27.02:039][595]LogWindows:Error: UE4Editor-CoreUObject.dll!LoadPackageInternalInner() [d:\main\main_stream\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1228] [2016.07.28-14.27.02:039][595]LogWindows:Error: UE4Editor-CoreUObject.dll!LoadPackage() [d:\main\main_stream\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1400] [2016.07.28-14.27.02:040][595]LogWindows:Error: UE4Editor-UnrealEd.dll!UEditorEngine::Map_Load() [d:\main\main_stream\engine\source\editor\unrealed\private\editorserver.cpp:2399] [2016.07.28-14.27.02:040][595]LogWindows:Error: UE4Editor-UnrealEd.dll!UEditorEngine::HandleMapCommand() [d:\main\main_stream\engine\source\editor\unrealed\private\editorserver.cpp:5998] [2016.07.28-14.27.02:040][595]LogWindows:Error: UE4Editor-UnrealEd.dll!UEditorEngine::Exec() [d:\main\main_stream\engine\source\editor\unrealed\private\editorserver.cpp:5479] [2016.07.28-14.27.02:041][595]LogWindows:Error: UE4Editor-UnrealEd.dll!UUnrealEdEngine::Exec() [d:\main\main_stream\engine\source\editor\unrealed\private\unrealedsrv.cpp:624] [2016.07.28-14.27.02:041][595]LogWindows:Error: UE4Editor-UnrealEd.dll!FEditorFileUtils::LoadMap() [d:\main\main_stream\engine\source\editor\unrealed\private\filehelpers.cpp:2197] [2016.07.28-14.27.02:042][595]LogWindows:Error: UE4Editor-UnrealEd.dll!`FEditorFileUtils::LoadMap'::`8'::FLocal::HandleLevelsChosen() [d:\main\main_stream\engine\source\editor\unrealed\private\filehelpers.cpp:2063] [2016.07.28-14.27.02:042][595]LogWindows:Error: UE4Editor-UnrealEd.dll!TBaseStaticDelegateInstance<void __cdecl(TArray<FAssetData,FDefaultAllocator> const & __ptr64)>::ExecuteIfSafe() [d:\main\main_stream\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:1017] [2016.07.28-14.27.02:042][595]LogWindows:Error: UE4Editor-UnrealEd.dll!`FEditorFileUtils::OpenLevelPickingDialog'::`2'::FLocal::OnLevelsSelected() [d:\main\main_stream\engine\source\editor\unrealed\private\filehelpers.cpp:1844] [2016.07.28-14.27.02:043][595]LogWindows:Error: UE4Editor-UnrealEd.dll!TBaseStaticDelegateInstance<void __cdecl(TArray<FAssetData,FDefaultAllocator> const & __ptr64),TBaseDelegate<void,TArray<FAssetData,FDefaultAllocator> const & __ptr64> >::ExecuteIfSafe() [d:\main\main_stream\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:1017] [2016.07.28-14.27.02:043][595]LogWindows:Error: UE4Editor-ContentBrowser.dll!SAssetDialog::ChooseAssetsForOpen() [d:\main\main_stream\engine\source\editor\contentbrowser\private\sassetdialog.cpp:484] [2016.07.28-14.27.02:044][595]LogWindows:Error: UE4Editor-ContentBrowser.dll!SAssetDialog::OnAssetsActivated() [d:\main\main_stream\engine\source\editor\contentbrowser\private\sassetdialog.cpp:401] [2016.07.28-14.27.02:044][595]LogWindows:Error: UE4Editor-ContentBrowser.dll!TBaseSPMethodDelegateInstance<0,SAssetDialog,0,TTypeWrapper<void> __cdecl(TArray<FAssetData,FDefaultAllocator> const & __ptr64,enum EAssetTypeActivationMethod::Type)>::Execute() [d:\main\main_stream\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:317] [2016.07.28-14.27.02:045][595]LogWindows:Error: UE4Editor-ContentBrowser.dll!TBaseSPMethodDelegateInstance<0,SAssetDialog,0,void __cdecl(TArray<FAssetData,FDefaultAllocator> const & __ptr64,enum EAssetTypeActivationMethod::Type)>::ExecuteIfSafe() [d:\main\main_stream\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:424] [2016.07.28-14.27.02:045][595]LogWindows:Error: UE4Editor-ContentBrowser.dll!TBaseDelegate<void,TArray<FAssetData,FDefaultAllocator> const & __ptr64,enum EAssetTypeActivationMethod::Type>::ExecuteIfBound() [d:\main\main_stream\engine\source\runtime\core\public\delegates\delegatesignatureimpl.inl:608] [2016.07.28-14.27.02:045][595]LogWindows:Error: UE4Editor-ContentBrowser.dll!TBaseSPMethodDelegateInstance<0,SAssetPicker,0,TTypeWrapper<void> __cdecl(TArray<FAssetData,FDefaultAllocator> const & __ptr64,enum EAssetTypeActivationMethod::Type)>::Execute() [d:\main\main_stream\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:317] [2016.07.28-14.27.02:046][595]LogWindows:Error: UE4Editor-ContentBrowser.dll!TBaseSPMethodDelegateInstance<0,SAssetPicker,0,void __cdecl(TArray<FAssetData,FDefaultAllocator> const & __ptr64,enum EAssetTypeActivationMethod::Type)>::ExecuteIfSafe() [d:\main\main_stream\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:424] [2016.07.28-14.27.02:046][595]LogWindows:Error: UE4Editor-ContentBrowser.dll!TBaseDelegate<void,TArray<FAssetData,FDefaultAllocator> const & __ptr64,enum EAssetTypeActivationMethod::Type>::ExecuteIfBound() [d:\main\main_stream\engine\source\runtime\core\public\delegates\delegatesignatureimpl.inl:608] [2016.07.28-14.27.02:047][595]LogWindows:Error: UE4Editor-ContentBrowser.dll!SAssetView::OnListMouseButtonDoubleClick() [d:\main\main_stream\engine\source\editor\contentbrowser\private\sassetview.cpp:3555] [2016.07.28-14.27.02:047][595]LogWindows:Error: UE4Editor-ContentBrowser.dll!TBaseSPMethodDelegateInstance<0,SAssetView,0,TTypeWrapper<void> __cdecl(TSharedPtr<FAssetViewItem,0>)>::Execute() [d:\main\main_stream\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:317] [2016.07.28-14.27.02:048][595]LogWindows:Error: UE4Editor-ContentBrowser.dll!TBaseSPMethodDelegateInstance<0,SAssetView,0,void __cdecl(TSharedPtr<FAssetViewItem,0>)>::ExecuteIfSafe() [d:\main\main_stream\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:424] [2016.07.28-14.27.02:048][595]LogWindows:Error: UE4Editor-ContentBrowser.dll!TBaseDelegate<void,TSharedPtr<FAssetViewItem,0> >::ExecuteIfBound() [d:\main\main_stream\engine\source\runtime\core\public\delegates\delegatesignatureimpl.inl:608] [2016.07.28-14.27.02:048][595]LogWindows:Error: UE4Editor-ContentBrowser.dll!SListView<TSharedPtr<FAssetViewItem,0> >::Private_OnItemDoubleClicked() [d:\main\main_stream\engine\source\runtime\slate\public\widgets\views\slistview.h:718] [2016.07.28-14.27.02:049][595]LogWindows:Error: UE4Editor-ContentBrowser.dll!STableRow<TSharedPtr<FAssetViewItem,0> >::OnMouseButtonDoubleClick() [d:\main\main_stream\engine\source\runtime\slate\public\widgets\views\stablerow.h:264] [2016.07.28-14.27.02:049][595]LogWindows:Error: UE4Editor-Slate.dll!<lambda_eeb33fd1b480e3cad58a1531d90d2e14>::operator()() [d:\main\main_stream\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5282] [2016.07.28-14.27.02:049][595]LogWindows:Error: UE4Editor-Slate.dll!FEventRouter::Route<FReply,FEventRouter::FBubblePolicy,FPointerEvent,<lambda_eeb33fd1b480e3cad58a1531d90d2e14> >() [d:\main\main_stream\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:215] [2016.07.28-14.27.02:050][595]LogWindows:Error: UE4Editor-Slate.dll!FSlateApplication::RoutePointerDoubleClickEvent() [d:\main\main_stream\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5280] [2016.07.28-14.27.02:050][595]LogWindows:Error: UE4Editor-Slate.dll!FSlateApplication::ProcessMouseButtonDoubleClickEvent() [d:\main\main_stream\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5265] [2016.07.28-14.27.02:051][595]LogWindows:Error: UE4Editor-Slate.dll!FSlateApplication::OnMouseDoubleClick() [d:\main\main_stream\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5243] [2016.07.28-14.27.02:051][595]LogWindows:Error: UE4Editor-Core.dll!FWindowsApplication::ProcessDeferredMessage() [d:\main\main_stream\engine\source\runtime\core\private\windows\windowsapplication.cpp:1588] [2016.07.28-14.27.02:051][595]LogWindows:Error: UE4Editor-Core.dll!FWindowsApplication::DeferMessage() [d:\main\main_stream\engine\source\runtime\core\private\windows\windowsapplication.cpp:1930] [2016.07.28-14.27.02:052][595]LogWindows:Error: UE4Editor-Core.dll!FWindowsApplication::ProcessMessage() [d:\main\main_stream\engine\source\runtime\core\private\windows\windowsapplication.cpp:747] [2016.07.28-14.27.02:052][595]LogWindows:Error: UE4Editor-Core.dll!FWindowsApplication::AppWndProc() [d:\main\main_stream\engine\source\runtime\core\private\windows\windowsapplication.cpp:669] [2016.07.28-14.27.02:053][595]LogWindows:Error: USER32.dll [2016.07.28-14.27.02:053][595]LogWindows:Error: USER32.dll [2016.07.28-14.27.02:053][595]LogWindows:Error: UE4Editor-Core.dll!FWindowsPlatformMisc::PumpMessages() [d:\main\main_stream\engine\source\runtime\core\private\windows\windowsplatformmisc.cpp:905] [2016.07.28-14.27.02:054][595]LogWindows:Error: UE4Editor.exe!FEngineLoop::Tick() [d:\main\main_stream\engine\source\runtime\launch\private\launchengineloop.cpp:2788] [2016.07.28-14.27.02:054][595]LogWindows:Error: UE4Editor.exe!GuardedMain() [d:\main\main_stream\engine\source\runtime\launch\private\launch.cpp:156] [2016.07.28-14.27.02:054][595]LogWindows:Error: UE4Editor.exe!GuardedMainWrapper() [d:\main\main_stream\engine\source\runtime\launch\private\windows\launchwindows.cpp:126] [2016.07.28-14.27.02:055][595]LogWindows:Error: UE4Editor.exe!WinMain() [d:\main\main_stream\engine\source\runtime\launch\private\windows\launchwindows.cpp:202] [2016.07.28-14.27.02:055][595]LogWindows:Error: UE4Editor.exe!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:264] [2016.07.28-14.27.02:056][595]LogWindows:Error: kernel32.dll [2016.07.28-14.27.02:056][595]LogWindows:Error: ntdll.dll [2016.07.28-14.27.02:057][595]LogWindows:Error: ntdll.dll [2016.07.28-14.27.02:057][595]LogWindows:Error:
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-33872 in the post.