While testing in //UE4/Release-4.16 CL 3466753 in Binary – I encountered an ensure when undoing the deletion of the RecastNavMesh.
Regression: No
This issue also occurs in //UE4/Main and //UE4/Release-4.15
Result:
Editor hits an Ensure.
Expected Result:
Deletion of the RecastNaveMesh is undone without error or warnings.
Frequency:
4/4
UE4Editor_Engine!UNavigationSystem::RegisterNavData() navigationsystem.cpp:1885 UE4Editor_Engine!UNavigationSystem::ProcessRegistrationCandidates() navigationsystem.cpp:1762 UE4Editor_Engine!TBaseUObjectMethodDelegateInstance<0,UNavigationSystem,void __cdecl() delegateinstancesimpl.h:858 UE4Editor_Engine!TGraphTask<FSimpleDelegateGraphTask>::ExecuteTask() taskgraphinterfaces.h:883 UE4Editor_Core!FNamedTaskThread::ProcessTasksNamedThread() taskgraph.cpp:954 UE4Editor_Core!FNamedTaskThread::ProcessTasksUntilQuit() taskgraph.cpp:701 UE4Editor_Core!FTaskGraphImplementation::WaitUntilTasksComplete() taskgraph.cpp:1809 UE4Editor_RenderCore!FTaskGraphInterface::WaitUntilTaskCompletes() taskgraphinterfaces.h:331 UE4Editor_RenderCore!FSuspendRenderingThread::FSuspendRenderingThread() renderingthread.cpp:129 UE4Editor_D3D11RHI!FD3D11DynamicRHI::InitD3DDevice() windowsd3d11device.cpp:820 UE4Editor_D3D11RHI!FD3D11Viewport::FD3D11Viewport() windowsd3d11viewport.cpp:39 UE4Editor_D3D11RHI!FD3D11DynamicRHI::RHICreateViewport() d3d11viewport.cpp:488 UE4Editor_SlateRHIRenderer!RHICreateViewport() dynamicrhi.h:1470 UE4Editor_SlateRHIRenderer!FSlateRHIRenderer::CreateViewport() slaterhirenderer.cpp:331 UE4Editor_SlateCore!SWindow::ShowWindow() swindow.cpp:1224 UE4Editor_Slate!FSlateApplication::AddWindowAsNativeChild() slateapplication.cpp:2101 UE4Editor_Slate!FSlateNotificationManager::CreateStackForArea() notificationmanager.cpp:101 UE4Editor_Slate!FSlateNotificationManager::AddNotification() notificationmanager.cpp:145 UE4Editor_UnrealEd!UEditorEngine::ShowUndoRedoNotification() editorserver.cpp:1168 UE4Editor_UnrealEd!UEditorEngine::HandleTransactorUndo() editorserver.cpp:1223 UE4Editor_UnrealEd!TBaseUObjectMethodDelegateInstance<0,UEditorEngine,TTypeWrapper<void> __cdecl() delegateinstancesimpl.h:766 UE4Editor_UnrealEd!TBaseUObjectMethodDelegateInstance<0,UEditorEngine,void __cdecl() delegateinstancesimpl.h:856 UE4Editor_UnrealEd!TBaseMulticastDelegate<void,FUndoSessionContext,bool>::Broadcast() delegatesignatureimpl.inl:937 UE4Editor_UnrealEd!UTransBuffer::Undo() editortransaction.cpp:866 UE4Editor_UnrealEd!UEditorEngine::Exec_Transaction() editorserver.cpp:5198 UE4Editor_UnrealEd!UEditorEngine::Exec() editorserver.cpp:5645 UE4Editor_UnrealEd!UUnrealEdEngine::Exec() unrealedsrv.cpp:670 UE4Editor_MainFrame!FMainFrameActionCallbacks::ExecuteExecCommand() mainframeactions.cpp:969 UE4Editor_MainFrame!TBaseStaticDelegateInstance<void __cdecl() delegateinstancesimpl.h:1027 UE4Editor_Slate!FUICommandList::ConditionalProcessCommandBindings() uicommandlist.cpp:216 UE4Editor_Slate!FUICommandList::ProcessCommandBindings() uicommandlist.cpp:160 UE4Editor_MainFrame!FMainFrameActionCallbacks::OnUnhandledKeyDownEvent() mainframeactions.cpp:211 UE4Editor_MainFrame!UE4Tuple_Private::TTupleImpl<TIntegerSequence<unsigned int> >::ApplyAfter<FReply() tuple.h:497 UE4Editor_MainFrame!TBaseStaticDelegateInstance<FReply __cdecl() delegateinstancesimpl.h:958 UE4Editor_Slate!TBaseDelegate<FReply,FKeyEvent const & __ptr64>::Execute() delegatesignatureimpl.inl:537 UE4Editor_Slate!FSlateApplication::ProcessKeyDownEvent() slateapplication.cpp:4641 UE4Editor_Slate!FSlateApplication::OnKeyDown() slateapplication.cpp:4541 UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() windowsapplication.cpp:1539 UE4Editor_Core!FWindowsApplication::DeferMessage() windowsapplication.cpp:2127 UE4Editor_Core!FWindowsApplication::ProcessMessage() windowsapplication.cpp:867 UE4Editor_Core!FWindowsApplication::AppWndProc() windowsapplication.cpp:714 user32!<Unknown> user32!<Unknown> UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() windowsplatformmisc.cpp:1009 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:253 kernel32!<Unknown> ntdll!<Unknown>
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There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-45564 in the post.