Crash occurs while progressing through the Landscape Overview tutorial, after the step "After pressing the Create Button, your level should now have a Landscape Actor inside of it"
This is a regression:
broken: 4.16.0 CL 3405315
worked: 4.15.1 CL 3348071
Current crash repro:
Result: Crash (S.Ellis note - this repro caused an Ensure for me, but not a crash)
Original crash repro, for reference:
Result: Crash
Assertion failed: ContainerPtr [File:D:\Build\++UE4+Release-4.16+Compile\Sync\Engine\Source\Runtime\CoreUObject\Public\UObject/UnrealType.h] [Line: 324] UE4Editor_CoreUObject!UObject::execLetValueOnPersistentFrame() [scriptcore.cpp:1788] UE4Editor_CoreUObject!UObject::ProcessInternal() [scriptcore.cpp:943] UE4Editor_CoreUObject!UFunction::Invoke() [class.cpp:4461] UE4Editor_CoreUObject!UObject::ProcessEvent() [scriptcore.cpp:1313] UE4Editor_IntroTutorials!UEditorTutorial::OnTutorialStageStarted() UE4Editor_IntroTutorials!STutorialRoot::LaunchTutorial() [stutorialroot.cpp:182] UE4Editor_IntroTutorials!STutorialRoot::GoToNextStage() [stutorialroot.cpp:391] UE4Editor_IntroTutorials!STutorialRoot::HandleNextClicked() [stutorialroot.cpp:200] UE4Editor_IntroTutorials!TBaseSPMethodDelegateInstance<0,STutorialRoot,0,TTypeWrapper<void> __cdecl() [delegateinstancesimpl.h:327] UE4Editor_IntroTutorials!TBaseSPMethodDelegateInstance<0,STutorialRoot,0,void __cdecl() [delegateinstancesimpl.h:434] UE4Editor_IntroTutorials!TBaseDelegate<void,TWeakPtr<SWindow,0> >::ExecuteIfBound() [delegatesignatureimpl.inl:624] UE4Editor_IntroTutorials!SEditorTutorials::HandleNextClicked() [seditortutorials.cpp:94] UE4Editor_IntroTutorials!TBaseSPMethodDelegateInstance<0,SEditorTutorials,0,TTypeWrapper<void> __cdecl() [delegateinstancesimpl.h:327] UE4Editor_IntroTutorials!TBaseSPMethodDelegateInstance<0,SEditorTutorials,0,void __cdecl() [delegateinstancesimpl.h:433] UE4Editor_IntroTutorials!STutorialContent::HandleNextClicked() [stutorialcontent.cpp:740] UE4Editor_IntroTutorials!TMemberFunctionCaller<STutorialContent,FReply() [delegateinstanceinterface.h:165] UE4Editor_IntroTutorials!UE4Tuple_Private::TTupleImpl<TIntegerSequence<unsigned int> >::ApplyAfter<TMemberFunctionCaller<STutorialContent,FReply() [tuple.h:497] UE4Editor_IntroTutorials!TBaseSPMethodDelegateInstance<0,STutorialContent,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:980] 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:264] kernel32!BaseThreadInitThunk() ntdll!RtlUserThreadStart()
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-44523 in the post.