Unreal Engine Issues and Bug Tracker (UE-151577)

Description

Assertion fails when a struct is opened with a class reference stored and with the struct as a variable in the class that's referenced. A restart is required in order to see this occur.

Repro Rate: 3/3

Tested this in //UE4/Release-4.27 @ CL#18319896 and the issue did not occur there, it is a regression!

=== Critical error: ===

Assertion failed: false [File:D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp] [Line: 5411]

Steps to Reproduce

Create a new Blank BP project
In the Content Browser, create a new Blueprint based on Actor
In the Content Browser, create a new Structure
Open the Structure
Change the type of MemberVar_0 to your Blueprint as a Class Reference
Set the default value to your Blueprint
Save and close
Open the Blueprint
Add a variable in with the type set to your structure
Compile & Save
Restart the Editor
Open the Structure again

Results: "Corrupt data found, please verify your installation." appears. Upon clicking OK, the editor crashes with an assertion failing.
Expected: Editor opens the structure up without the editor crashing.

Callstack

=== Critical error: ===

Assertion failed: false [File:D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp] [Line: 5411] 



[Callstack] 0x00007fff1964162b UnrealEditor-CoreUObject.dll!FLinkerLoad::IndexToObject() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:5411]
[Callstack] 0x00007fff196931ce UnrealEditor-CoreUObject.dll!FLinkerLoad::ResolveResource() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3973]
[Callstack] 0x00007fff195eaa9e UnrealEditor-CoreUObject.dll!FLinkerLoad::operator<<() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:5639]
[Callstack] 0x00007fff195b886d UnrealEditor-CoreUObject.dll!UClass::Serialize() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\Class.cpp:4625]
[Callstack] 0x00007fff0dfcfd6f UnrealEditor-Engine.dll!UBlueprintGeneratedClass::Serialize() [D:\build\++UE5\Sync\Engine\Source\Runtime\Engine\Private\BlueprintGeneratedClass.cpp:1805]
[Callstack] 0x00007fff1964ec66 UnrealEditor-CoreUObject.dll!FLinkerLoad::Preload() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:4388]
[Callstack] 0x00007fff19600a4a UnrealEditor-CoreUObject.dll!FLinkerLoad::CreateExport() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:5146]
[Callstack] 0x00007fff19600f0b UnrealEditor-CoreUObject.dll!FLinkerLoad::CreateExportAndPreload() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3745]
[Callstack] 0x00007fff19643d5d UnrealEditor-CoreUObject.dll!FLinkerLoad::LoadAllObjects() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3921]
[Callstack] 0x00007fff198091d7 UnrealEditor-CoreUObject.dll!LoadPackageInternal() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1346]
[Callstack] 0x00007fff195ebb84 UnrealEditor-CoreUObject.dll!<lambda_016cec4293e743540f8ee81a30ee3940>::operator()() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3293]
[Callstack] 0x00007fff196a46a0 UnrealEditor-CoreUObject.dll!FLinkerLoad::VerifyImportInner() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3408]
[Callstack] 0x00007fff196a2cd7 UnrealEditor-CoreUObject.dll!FLinkerLoad::VerifyImport() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2959]
[Callstack] 0x00007fff196a474f UnrealEditor-CoreUObject.dll!FLinkerLoad::VerifyImportInner() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3436]
[Callstack] 0x00007fff196a2cd7 UnrealEditor-CoreUObject.dll!FLinkerLoad::VerifyImport() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2959]
[Callstack] 0x00007fff196a2723 UnrealEditor-CoreUObject.dll!FLinkerLoad::Verify() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2738]
[Callstack] 0x00007fff1961846f UnrealEditor-CoreUObject.dll!FLinkerLoad::FinalizeCreation() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2573]
[Callstack] 0x00007fff1969d4bc UnrealEditor-CoreUObject.dll!FLinkerLoad::Tick() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:821]
[Callstack] 0x00007fff19602f21 UnrealEditor-CoreUObject.dll!FLinkerLoad::CreateLinker() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:465]
[Callstack] 0x00007fff19633b59 UnrealEditor-CoreUObject.dll!GetPackageLinker() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\Linker.cpp:850]
[Callstack] 0x00007fff19808ee2 UnrealEditor-CoreUObject.dll!LoadPackageInternal() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1239]
[Callstack] 0x00007fff19807c0a UnrealEditor-CoreUObject.dll!LoadPackage() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1520]
[Callstack] 0x00007fff19808160 UnrealEditor-CoreUObject.dll!LoadPackage() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1500]
[Callstack] 0x00007fff1981fb98 UnrealEditor-CoreUObject.dll!ResolveName() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:798]
[Callstack] 0x00007fff1982bf35 UnrealEditor-CoreUObject.dll!StaticLoadObjectInternal() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:875]
[Callstack] 0x00007fff1982b765 UnrealEditor-CoreUObject.dll!StaticLoadObject() [D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:953]
[Callstack] 0x00007ffed4100720 UnrealEditor-ContentBrowserAssetDataSource.dll!ContentBrowserAssetData::EditOrPreviewAssetFileItems() [D:\build\++UE5\Sync\Engine\Plugins\Editor\ContentBrowser\ContentBrowserAssetDataSource\Source\ContentBrowserAssetDataSource\Private\ContentBrowserAssetDataCore.cpp:259]
[Callstack] 0x00007ffed4100a60 UnrealEditor-ContentBrowserAssetDataSource.dll!ContentBrowserAssetData::EditOrPreviewItems() [D:\build\++UE5\Sync\Engine\Plugins\Editor\ContentBrowser\ContentBrowserAssetDataSource\Source\ContentBrowserAssetDataSource\Private\ContentBrowserAssetDataCore.cpp:290]
[Callstack] 0x00007ffed40e9aff UnrealEditor-ContentBrowserAssetDataSource.dll!UContentBrowserAssetDataSource::BulkEditItems() [D:\build\++UE5\Sync\Engine\Plugins\Editor\ContentBrowser\ContentBrowserAssetDataSource\Source\ContentBrowserAssetDataSource\Private\ContentBrowserAssetDataSource.cpp:1228]
[Callstack] 0x00007ffee8ac20f0 UnrealEditor-ContentBrowser.dll!SContentBrowser::OnItemsActivated() [D:\build\++UE5\Sync\Engine\Source\Editor\ContentBrowser\Private\SContentBrowser.cpp:2680]
[Callstack] 0x00007ffee8a7b010 UnrealEditor-ContentBrowser.dll!TBaseSPMethodDelegateInstance<0,SContentBrowser,1,void __cdecl(TArrayView<FContentBrowserItem const ,int>,enum EAssetTypeActivationMethod::Type),FDefaultDelegateUserPolicy>::Execute() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:290]
[Callstack] 0x00007ffee8ac44db UnrealEditor-ContentBrowser.dll!SAssetView::OnListMouseButtonDoubleClick() [D:\build\++UE5\Sync\Engine\Source\Editor\ContentBrowser\Private\SAssetView.cpp:3658]
[Callstack] 0x00007ffee8a82c36 UnrealEditor-ContentBrowser.dll!TBaseSPMethodDelegateInstance<0,SAssetView,1,void __cdecl(TSharedPtr<FAssetViewItem,1>),FDefaultDelegateUserPolicy>::ExecuteIfSafe() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:307]
[Callstack] 0x00007ffee8a08802 UnrealEditor-ContentBrowser.dll!TDelegate<void __cdecl(TSharedPtr<FAssetViewItem,1>),FDefaultDelegateUserPolicy>::ExecuteIfBound<void,0>() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateSignatureImpl.inl:607]
[Callstack] 0x00007ffee8ad767d UnrealEditor-ContentBrowser.dll!SListView<TSharedPtr<FAssetViewItem,1> >::Private_OnItemDoubleClicked() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Public\Widgets\Views\SListView.h:1087]
[Callstack] 0x00007ffee8ac48a2 UnrealEditor-ContentBrowser.dll!STableRow<TSharedPtr<FAssetViewItem,1> >::OnMouseButtonDoubleClick() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Public\Widgets\Views\STableRow.h:398]
[Callstack] 0x00007fff23de601e UnrealEditor-Slate.dll!FEventRouter::Route<FReply,FEventRouter::FBubblePolicy,FPointerEvent,<lambda_be18c20258355610e1a03a230227eebb> >() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:405]
[Callstack] 0x00007fff23e5e866 UnrealEditor-Slate.dll!FSlateApplication::RoutePointerDoubleClickEvent() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:5420]
[Callstack] 0x00007fff23e48249 UnrealEditor-Slate.dll!FSlateApplication::ProcessMouseButtonDoubleClickEvent() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:5405]
[Callstack] 0x00007fff23e3cea1 UnrealEditor-Slate.dll!FSlateApplication::OnMouseDoubleClick() [D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:5368]
[Callstack] 0x00007fff4f81a8f5 UnrealEditor-ApplicationCore.dll!FWindowsApplication::ProcessDeferredMessage() [D:\build\++UE5\Sync\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsApplication.cpp:2214]
[Callstack] 0x00007fff4f809247 UnrealEditor-ApplicationCore.dll!FWindowsApplication::DeferMessage() [D:\build\++UE5\Sync\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsApplication.cpp:2699]
[Callstack] 0x00007fff4f81ce51 UnrealEditor-ApplicationCore.dll!FWindowsApplication::ProcessMessage() [D:\build\++UE5\Sync\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsApplication.cpp:1078]
[Callstack] 0x00007fff4f8049a7 UnrealEditor-ApplicationCore.dll!FWindowsApplication::AppWndProc() [D:\build\++UE5\Sync\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsApplication.cpp:916]
[Callstack] 0x00007fff662f63ed USER32.dll!UnknownFunction []
[Callstack] 0x00007fff662f60be USER32.dll!UnknownFunction []
[Callstack] 0x00007ffecda46552 InkObj.dll!UnknownFunction []
[Callstack] 0x00007fff3fbe1028 atlthunk.dll!UnknownFunction []
[Callstack] 0x00007fff662f63ed USER32.dll!UnknownFunction []
[Callstack] 0x00007fff662f5de2 USER32.dll!UnknownFunction []
[Callstack] 0x00007fff4f81e148 UnrealEditor-ApplicationCore.dll!FWindowsPlatformApplicationMisc::PumpMessages() [D:\build\++UE5\Sync\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsPlatformApplicationMisc.cpp:138]
[Callstack] 0x00007ff60fe17114 UnrealEditor.exe!FEngineLoop::Tick() [D:\build\++UE5\Sync\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:5139]
[Callstack] 0x00007ff60fe30d9c UnrealEditor.exe!GuardedMain() [D:\build\++UE5\Sync\Engine\Source\Runtime\Launch\Private\Launch.cpp:183]
[Callstack] 0x00007ff60fe30e8a UnrealEditor.exe!GuardedMainWrapper() [D:\build\++UE5\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:147]
[Callstack] 0x00007ff60fe33c4d UnrealEditor.exe!LaunchWindowsStartup() [D:\build\++UE5\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:283]
[Callstack] 0x00007ff60fe45534 UnrealEditor.exe!WinMain() [D:\build\++UE5\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:330]
[Callstack] 0x00007ff60fe486e6 UnrealEditor.exe!__scrt_common_main_seh() [d:\a01\_work\6\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288]
[Callstack] 0x00007fff66497bd4 KERNEL32.DLL!UnknownFunction []
[Callstack] 0x00007fff6718ced1 ntdll.dll!UnknownFunction []

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Fixed

Component	UE - Gameplay - Blueprint
Affects Versions	5.0
Target Fix	5.1

Fix Commit	21046604
Main Commit	21075536

Created	May 10, 2022
Resolved	Jul 11, 2022
Updated	Jul 17, 2022

UE-151577

Assertion fails when a struct is opened with a BP class reference stored and with that struct as a variable in the BP class that's referenced.

Assertion fails when a struct is opened with a BP class reference stored and with that struct as a variable in the BP class that's referenced.

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