Unreal Engine Issues

UE-39055

Crash with a migrated BP actor using InstancedStaticMeshComponent

Crash with a migrated BP actor using InstancedStaticMeshComponent

Description

A licensee reported one of their map crashes on open when they tried to migrate from 4.12 to 4.14. There was no crash in 4.13.

This seems to be caused by a certain BP actor that adds InstancedStaticMeshComponent on its construction script.

Steps to Reproduce

1. Open the attached project in 4.14
2. open maps/untitled.umap
3. Editor crashes.

Callstack
UE4Editor_CoreUObject!UObject::Rename() [obj.cpp:168]
UE4Editor_Engine!UActorComponent::Rename() [actorcomponent.cpp:224]
UE4Editor_Engine!UInheritableComponentHandler::PostLoad() [inheritablecomponenthandler.cpp:48]
UE4Editor_CoreUObject!UObject::ConditionalPostLoad() [obj.cpp:832]
UE4Editor_CoreUObject!EndLoad() [uobjectglobals.cpp:1590]
UE4Editor_CoreUObject!LoadPackageInternalInner() [uobjectglobals.cpp:1281]
UE4Editor_CoreUObject!LoadPackage() [uobjectglobals.cpp:1437]
UE4Editor_CoreUObject!ResolveName() [uobjectglobals.cpp:722]
UE4Editor_CoreUObject!StaticLoadObjectInternal() [uobjectglobals.cpp:809]
UE4Editor_CoreUObject!StaticLoadObject() [uobjectglobals.cpp:869]
UE4Editor_ContentBrowser!FAssetData::GetAsset() [assetdata.h:223]
UE4Editor_ContentBrowser!SContentBrowser::OnAssetsActivated() [scontentbrowser.cpp:1802]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SContentBrowser,0,TTypeWrapper<void> __cdecl() [delegateinstancesimpl.h:318]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SContentBrowser,0,void __cdecl() [delegateinstancesimpl.h:425]
UE4Editor_ContentBrowser!TBaseDelegate<void,TArray<FAssetData,FDefaultAllocator> const & __ptr64,enum EAssetTypeActivationMethod::Type>::ExecuteIfBound() [delegatesignatureimpl.inl:609]
UE4Editor_ContentBrowser!SAssetView::OnListMouseButtonDoubleClick() [sassetview.cpp:3657]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SAssetView,0,TTypeWrapper<void> __cdecl() [delegateinstancesimpl.h:318]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SAssetView,0,void __cdecl() [delegateinstancesimpl.h:425]
UE4Editor_ContentBrowser!TBaseDelegate<void,TSharedPtr<FAssetViewItem,0> >::ExecuteIfBound() [delegatesignatureimpl.inl:609]
UE4Editor_ContentBrowser!SListView<TSharedPtr<FAssetViewItem,0> >::Private_OnItemDoubleClicked() [slistview.h:718]
UE4Editor_ContentBrowser!STableRow<TSharedPtr<FAssetViewItem,0> >::OnMouseButtonDoubleClick() [stablerow.h:264]
UE4Editor_Slate!<lambda_eeb33fd1b480e3cad58a1531d90d2e14>::operator() [slateapplication.cpp:5404]
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FBubblePolicy,FPointerEvent,<lambda_eeb33fd1b480e3cad58a1531d90d2e14> >() [slateapplication.cpp:215]
UE4Editor_Slate!FSlateApplication::RoutePointerDoubleClickEvent() [slateapplication.cpp:5402]
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonDoubleClickEvent() [slateapplication.cpp:5387]
UE4Editor_Slate!FSlateApplication::OnMouseDoubleClick() [slateapplication.cpp:5365]
UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() [windowsapplication.cpp:1656]
UE4Editor_Core!FWindowsApplication::DeferMessage() [windowsapplication.cpp:2071]
UE4Editor_Core!FWindowsApplication::ProcessMessage() [windowsapplication.cpp:814]
UE4Editor_Core!FWindowsApplication::AppWndProc() [windowsapplication.cpp:678]
user32!<Unknown>
user32!<Unknown>
UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() [windowsplatformmisc.cpp:951]
UE4Editor!FEngineLoop::Tick() [launchengineloop.cpp:2811]
UE4Editor!GuardedMain() [launch.cpp:152]
UE4Editor!GuardedMainWrapper() [launchwindows.cpp:126]
UE4Editor!WinMain() [launchwindows.cpp:202]
UE4Editor!__scrt_common_main_seh() [exe_common.inl:264]
kernel32!<Unknown>
ntdll!<Unknown>
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Fixed
ComponentUE - Gameplay - Blueprint
Affects Versions4.14
Target Fix4.15
Fix Commit3224507
Main Commit3236017
CreatedNov 28, 2016
ResolvedDec 7, 2016
UpdatedFeb 23, 2021
View Jira Issue