Bug with Lumen FScene::FindLumenSceneData( | UE 5.2

Manking-1 · June 19, 2023, 12:46pm

Hello!

This is the fourth time such a strange bug has occurred.

macbook M1 max UE 5.2

Caught signal

FScene::FindLumenSceneData(unsigned int, unsigned int) const Address = 0x1277ae94c (filename not found) [in UnrealEditor-Renderer.dylib]
ShouldRenderLumenForViewFamily(FScene const*, FSceneViewFamily const&, bool) Address = 0x1272c5ce4 (filename not found) [in UnrealEditor-Renderer.dylib]
Lumen::IsLumenFeatureAllowedForView(FScene const*, FSceneView const&, bool, bool) Address = 0x12729cb20 (filename not found) [in UnrealEditor-Renderer.dylib]
ShouldRenderLumenDiffuseGI(FScene const*, FSceneView const&, bool, bool) Address = 0x127206d7c (filename not found) [in UnrealEditor-Renderer.dylib]
FSceneRenderer::FSceneRenderer(FSceneViewFamily const*, FHitProxyConsumer*) Address = 0x1278cd9d4 (filename not found) [in UnrealEditor-Renderer.dylib]
FDeferredShadingSceneRenderer::FDeferredShadingSceneRenderer(FSceneViewFamily const*, FHitProxyConsumer*) Address = 0x126e42488 (filename not found) [in UnrealEditor-Renderer.dylib]
FSceneRenderer::CreateSceneRenderers(TArrayView<FSceneViewFamily const*, int>, FHitProxyConsumer*, TArray<FSceneRenderer*, TSizedDefaultAllocator<32>>&) Address = 0x1278d58f4 (filename not found) [in UnrealEditor-Renderer.dylib]
FSceneRenderer::CreateSceneRenderer(FSceneViewFamily const*, FHitProxyConsumer*) Address = 0x1278d5bd4 (filename not found) [in UnrealEditor-Renderer.dylib]
CreateSceneRendererForSceneCapture(FScene*, USceneCaptureComponent*, FRenderTarget*, UE::Math::TIntPoint, UE::Math::TMatrix const&, UE::Math::TVector const&, UE::Math::TMatrix const&, bool, float, bool, FPostProcessSettings*, float, AActor const*, int) Address = 0x1278a5964 (filename not found) [in UnrealEditor-Renderer.dylib]
FScene::UpdateSceneCaptureContents(USceneCaptureComponent2D*) Address = 0x1278a3abc (filename not found) [in UnrealEditor-Renderer.dylib]
USceneCaptureComponent::UpdateDeferredCaptures(FSceneInterface*) Address = 0x11a18f504 (filename not found) [in UnrealEditor-Engine.dylib]
FRendererModule::BeginRenderingViewFamilies(FCanvas*, TArrayView<FSceneViewFamily*, int>) Address = 0x1278d94a8 (filename not found) [in UnrealEditor-Renderer.dylib]
FRendererModule::BeginRenderingViewFamily(FCanvas*, FSceneViewFamily*) Address = 0x1278d7ee4 (filename not found) [in UnrealEditor-Renderer.dylib]
UGameViewportClient::Draw(FViewport*, FCanvas*) Address = 0x11a615d48 (filename not found) [in UnrealEditor-Engine.dylib]
FViewport::Draw(bool) Address = 0x11b8e0394 (filename not found) [in UnrealEditor-Engine.dylib]
UEditorEngine::Tick(float, bool) Address = 0x114711edc (filename not found) [in UnrealEditor-UnrealEd.dylib]
UUnrealEdEngine::Tick(float, bool) Address = 0x1154676b8 (filename not found) [in UnrealEditor-UnrealEd.dylib]
FEngineLoop::Tick() Address = 0x104e6c844 (filename not found) [in UnrealEditor]
GuardedMain(char16_t const*) Address = 0x104e78b10 (filename not found) [in UnrealEditor]
-[UEAppDelegate runGameThread:] Address = 0x104e93cd0 (filename not found) [in UnrealEditor]
-[FCocoaGameThread main] Address = 0x1088d53e8 (filename not found) [in UnrealEditor-Core.dylib]
Unknown() Address = 0x1a0fcb54c (filename not found) [in Foundation]
Unknown() Address = 0x19ff7bfa8 (filename not found) [in libsystem_pthread.dylib]
Unknown() Address = 0x19ff76da0 (filename not found) [in libsystem_pthread.dylib]

David_Gilbert · September 14, 2023, 7:38am

Hi,

I’m still having this issue as well on Linux (CentOS and Ubuntu). It’s quite random when it happens and seems to be exclusively happening when launching via nDisplay for me. (Though I’m rarely launching otherwise)

[2023.09.14-07.26.36:647][  0]LogCore: === Critical error: ===
Unhandled Exception: SIGSEGV: invalid attempt to read memory at address 0x00000aa367609ce4

[2023.09.14-07.26.36:647][  0]LogCore: Fatal error!

0x00002b1811074c9b libUnrealEditor-Renderer.so!FScene::FindLumenSceneData(unsigned int, unsigned int) const [/home/ue4/UnrealEngine/Engine/Source/./Runtime/Renderer/Private/RendererScene.cpp:1348]
0x00002b181078ef0f libUnrealEditor-Renderer.so!ShouldRenderLumenForViewFamily(FScene const*, FSceneViewFamily const&, bool) [/home/ue4/UnrealEngine/Engine/Source/./Runtime/Renderer/Private/Lumen/Lumen.cpp:122]
0x00002b181078ebe3 libUnrealEditor-Renderer.so!ShouldRenderLumenDiffuseGI(FScene const*, FSceneView const&, bool, bool) [/home/ue4/UnrealEngine/Engine/Source/./Runtime/Renderer/Private/Lumen/LumenDiffuseIndirect.cpp:261]
0x00002b18111d8fc4 libUnrealEditor-Renderer.so!FSceneRenderer::FSceneRenderer(FSceneViewFamily const*, FHitProxyConsumer*) [/home/ue4/UnrealEngine/Engine/Source/./Runtime/Renderer/Private/SceneRendering.cpp:2558]
0x00002b18102a6350 libUnrealEditor-Renderer.so!FDeferredShadingSceneRenderer::FDeferredShadingSceneRenderer(FSceneViewFamily const*, FHitProxyConsumer*) [/home/ue4/UnrealEngine/Engine/Source/./Runtime/Renderer/Private/DeferredShadingRenderer.cpp:516]
0x00002b18111e3434 libUnrealEditor-Renderer.so!FSceneRenderer::CreateSceneRenderers(TArrayView<FSceneViewFamily const*, int>, FHitProxyConsumer*, TArray<FSceneRenderer*, TSizedDefaultAllocator<32> >&) [/home/ue4/UnrealEngine/Engine/Source/./Runtime/Renderer/Private/SceneRendering.cpp:4010]
0x00002b18111e956d libUnrealEditor-Renderer.so!FRendererModule::BeginRenderingViewFamilies(FCanvas*, TArrayView<FSceneViewFamily*, int>) [/home/ue4/UnrealEngine/Engine/Source/./Runtime/Renderer/Private/SceneRendering.cpp:4806]
0x00002b19741b1fe2 libUnrealEditor-DisplayCluster.so!UDisplayClusterViewportClient::Draw(FViewport*, FCanvas*) [/home/ue4/UnrealEngine/Engine/Source/./../Plugins/Runtime/nDisplay/Source/DisplayCluster/Private/Game/EngineClasses/Basics/DisplayClusterViewportClient.cpp:872]
0x00002b17fc5f1942 libUnrealEditor-Engine.so!FViewport::Draw(bool) [/home/ue4/UnrealEngine/Engine/Source/./Runtime/Engine/Private/UnrealClient.cpp:1852]
0x00002b17fc218876 libUnrealEditor-Engine.so!FSceneViewport::ResizeViewport(unsigned int, unsigned int, EWindowMode::Type) [/home/ue4/UnrealEngine/Engine/Source/./Runtime/Engine/Private/Slate/SceneViewport.cpp:1616]
0x00002b17fc217219 libUnrealEditor-Engine.so!FSceneViewport::ResizeFrame(unsigned int, unsigned int, EWindowMode::Type) [/home/ue4/UnrealEngine/Engine/Source/./Runtime/Engine/Private/Slate/SceneViewport.cpp:1494]
0x00002b17fb031e22 libUnrealEditor-Engine.so!UGameEngine::SwitchGameWindowToUseGameViewport() [/home/ue4/UnrealEngine/Engine/Source/./Runtime/Engine/Private/GameEngine.cpp:690]
0x00000000002395b6 UnrealEditor!FEngineLoop::Init() [/home/ue4/UnrealEngine/Engine/Source/./Runtime/Launch/Private/LaunchEngineLoop.cpp:4869]
0x000000000024ebcd UnrealEditor!GuardedMain(char16_t const*) [/home/ue4/UnrealEngine/Engine/Source/./Runtime/Launch/Private/Launch.cpp:166]
0x00002b1801ff8b32 libUnrealEditor-UnixCommonStartup.so!CommonUnixMain(int, char**, int (*)(char16_t const*), void (*)()) [/home/ue4/UnrealEngine/Engine/Source/./Runtime/Unix/UnixCommonStartup/Private/UnixCommonStartup.cpp:269]
0x00002b1802112d90 libc.so.6!UnknownFunction(0x29d8f)
0x00002b1802112e40 libc.so.6!__libc_start_main(+0x7f)
0x0000000000238509 UnrealEditor!_start()

Interestingly it mostly manifests if I launch the 48 nDisplay nodes from the same filesystem at the same time. If I use switchboard to launch them one by one, this error has not occured yet. I’m quite confused.

oleksii-dtsc · April 26, 2024, 2:56pm

Hi,
Have you solved this issue? I’m building an nDisplay app, and hitting a similar wall.