Unreal Engine Issues and Bug Tracker (UE-67234)

Description

Adding an instance of Atmospheric Fog to a Level causes the Editor to crash on both Linux and Windows when using Vulkan. There is a different callstack when SteamVR is enabled on Linux which is also attached.

This was reported and tested in 4.21.1 (CL-4613538). This was reproduced in 4.20.3 (CL-4369336) and Main 4.22 (CL-4629913)

Steps to Reproduce

Open the UE4 Editor and create a Blank Template project
In the default map that opens up, select Atmospheric Fog from the World Outliner and delete it
In the Modes tab click on Visual Effects and drag an instance of Atmospheric Fog to the Level

Results: The Editor crashes

Expected: The Editor doesn't crash

Callstack

Callstack 1

0x00007f9a93b2cc06 libUE4Editor-Renderer.so!FAtmosphericFogSceneInfo::Read3DPixelsPtr(FRHICommandListImmediate&, TRefCountPtr<IPooledRenderTarget>, FFloat16Color*, FIntRect, FIntPoint) [/home/test/UnrealEngine-4.21/Engine/Source/Runtime/Renderer/Private/AtmosphereRendering.cpp:1545]
 0x00007f9a93b2d338 libUE4Editor-Renderer.so!FAtmosphericFogSceneInfo::PrecomputeTextures(FRHICommandListImmediate&, FViewInfo const*, FSceneViewFamily*) [/home/test/UnrealEngine-4.21/Engine/Source/Runtime/Renderer/Private/AtmosphereRendering.cpp:1656] 0x00007f9a93c08d96 libUE4Editor-Renderer.so!FDeferredShadingSceneRenderer::Render(FRHICommandListImmediate&) [/home/test/UnrealEngine-4.21/Engine/Source/Runtime/Renderer/Private/DeferredShadingRenderer.cpp:1315] 0x00007f9a941861da libUE4Editor-Renderer.so!RenderViewFamily_RenderThread(FRHICommandListImmediate&, FSceneRenderer*) [/home/test/UnrealEngine-4.21/Engine/Source/Runtime/Renderer/Private/SceneRendering.cpp:2949] 0x00007f9a9419605c libUE4Editor-Renderer.so!TGraphTask<FRendererModule::BeginRenderingViewFamily(FCanvas*, FSceneViewFamily*)::EURCMacro_FDrawSceneCommand>::ExecuteTask(TArray<FBaseGraphTask*, FDefaultAllocator>&, ENamedThreads::Type) [/home/test/UnrealEngine-.21/Engine/Source/Runtime/Core/Public/Async/TaskGraphInterfaces.h:829] 0x00007f9aaf114ed9 libUE4Editor-Core.so!FNamedTaskThread::ProcessTasksNamedThread(int, bool) [/home/test/UnrealEngine-4.21/Engine/Source/Runtime/Core/Private/Async/TaskGraph.cpp:678] 0x00007f9aaf113fb3 libUE4Editor-Core.so!FNamedTaskThread::ProcessTasksUntilQuit(int) [/home/test/UnrealEngine-4.21/Engine/Source/Runtime/Core/Private/Async/TaskGraph.cpp:574] 0x00007f9aa940e13f libUE4Editor-RenderCore.so!RenderingThreadMain(FEvent*) [/home/test/UnrealEngine-4.21/Engine/Source/Runtime/RenderCore/Private/RenderingThread.cpp:332] 0x00007f9aa9424a92 libUE4Editor-RenderCore.so!FRenderingThread::Run() [/home/test/UnrealEngine-4.21/Engine/Source/Runtime/RenderCore/Private/RenderingThread.cpp:484] 0x00007f9aaf190aac libUE4Editor-Core.so!FRunnableThreadPThread::Run() [/home/test/UnrealEngine-4.21/Engine/Source/Runtime/Core/Private/HAL/PThreadRunnableThread.cpp:25] 0x00007f9aaf17a2c3 libUE4Editor-Core.so!FRunnableThreadPThread::_ThreadProc(void*) [/home/test/UnrealEngine-4.21/Engine/Source/Runtime/Core/Private/HAL/PThreadRunnableThread.h:177] 0x00007f9aafe4e6db libpthread.so.0!UnknownFunction(0x76da) 0x00007f9aa386c88f libc.so.6!clone(+0x3e)
libUE4Editor-Core.so!FGenericPlatformMisc::RaiseException(unsigned int) [/home/test/UnrealEngine-4.21/Engine/Source/Runtime/Core/Private/GenericPlatform/GenericPlatformMisc.cpp:411]
libUE4Editor-Core.so!FUnixErrorOutputDevice::Serialize(char16_t const*, ELogVerbosity::Type, FName const&) [/home/test/UnrealEngine-4.21/Engine/Source/Runtime/Core/Private/Unix/UnixErrorOutputDevice.cpp:56]
libUE4Editor-Core.so!FOutputDevice::LogfImpl(char16_t const*, ...) [/home/test/UnrealEngine-4.21/Engine/Source/Runtime/Core/Private/Misc/OutputDevice.cpp:71]
libUE4Editor-Core.so!FDebug::AssertFailed(char const*, char const*, int, char16_t const*, ...) [/home/test/UnrealEngine-4.21/Engine/Source/Runtime/Core/Private/Misc/AssertionMacros.cpp:417]
libUE4Editor-VulkanRHI.so!FVulkanDynamicRHI::RHIRead3DSurfaceFloatData(FRHITexture*, FIntRect, FIntPoint, TArray<FFloat16Color, FDefaultAllocator>&) [/home/test/UnrealEngine-4.21/Engine/Source/Runtime/VulkanRHI/Private/VulkanRenderTarget.cpp:1152]
libUE4Editor-Renderer.so!FAtmosphericFogSceneInfo::Read3DPixelsPtr(FRHICommandListImmediate&, TRefCountPtr<IPooledRenderTarget>, FFloat16Color*, FIntRect, FIntPoint) [/home/test/UnrealEngine-4.21/Engine/Source/Runtime/Renderer/Private/AtmosphereRendering.cpp:1545]
libUE4Editor-Renderer.so!FAtmosphericFogSceneInfo::PrecomputeTextures(FRHICommandListImmediate&, FViewInfo const*, FSceneViewFamily*) [/home/test/UnrealEngine-4.21/Engine/Source/Runtime/Renderer/Private/AtmosphereRendering.cpp:1656]
libUE4Editor-Renderer.so!FDeferredShadingSceneRenderer::Render(FRHICommandListImmediate&) [/home/test/UnrealEngine-4.21/Engine/Source/Runtime/Renderer/Private/DeferredShadingRenderer.cpp:1315]
libUE4Editor-Renderer.so!RenderViewFamily_RenderThread(FRHICommandListImmediate&, FSceneRenderer*) [/home/test/UnrealEngine-4.21/Engine/Source/Runtime/Renderer/Private/SceneRendering.cpp:2949]
libUE4Editor-Renderer.so!TGraphTask<FRendererModule::BeginRenderingViewFamily(FCanvas*, FSceneViewFamily*)::EURCMacro_FDrawSceneCommand>::ExecuteTask(TArray<FBaseGraphTask*, FDefaultAllocator>&, ENamedThreads::Type) [/home/test/UnrealEngine-4.21/Engine/Source/Runtime/Core/Public/Async/TaskGraphInterfaces.h:829]
libUE4Editor-Core.so!FNamedTaskThread::ProcessTasksNamedThread(int, bool) [/home/test/UnrealEngine-4.21/Engine/Source/Runtime/Core/Private/Async/TaskGraph.cpp:678]
libUE4Editor-Core.so!FNamedTaskThread::ProcessTasksUntilQuit(int) [/home/test/UnrealEngine-4.21/Engine/Source/Runtime/Core/Private/Async/TaskGraph.cpp:574]
libUE4Editor-RenderCore.so!RenderingThreadMain(FEvent*) [/home/test/UnrealEngine-4.21/Engine/Source/Runtime/RenderCore/Private/RenderingThread.cpp:332]
libUE4Editor-RenderCore.so!FRenderingThread::Run() [/home/test/UnrealEngine-4.21/Engine/Source/Runtime/RenderCore/Private/RenderingThread.cpp:484]
libUE4Editor-Core.so!FRunnableThreadPThread::Run() [/home/test/UnrealEngine-4.21/Engine/Source/Runtime/Core/Private/HAL/PThreadRunnableThread.cpp:25]
libUE4Editor-Core.so!FRunnableThreadPThread::_ThreadProc(void*) [/home/test/UnrealEngine-4.21/Engine/Source/Runtime/Core/Private/HAL/PThreadRunnableThread.h:177]
libpthread.so.0!UnknownFunction(0x76da)
libc.so.6!clone(+0x3e)

Callstack 2

[2018.12.05-18.19.00:117][ 96]LogWindows: Error: [Callstack] 0x00007fff9eb050d8 KERNELBASE.dll!UnknownFunction []
[2018.12.05-18.19.00:117][ 96]LogWindows: Error: [Callstack] 0x00007fff80736850 UE4Editor-ApplicationCore.dll!FWindowsErrorOutputDevice::Serialize() [d:\build\++ue4\sync\engine\source\runtime\applicationcore\private\windows\windowserroroutputdevice.cpp:65]
[2018.12.05-18.19.00:117][ 96]LogWindows: Error: [Callstack] 0x00007fff582462fc UE4Editor-Core.dll!FOutputDevice::LogfImpl() [d:\build\++ue4\sync\engine\source\runtime\core\private\misc\outputdevice.cpp:70]
[2018.12.05-18.19.00:117][ 96]LogWindows: Error: [Callstack] 0x00007fff581d51db UE4Editor-Core.dll!FDebug::AssertFailed() [d:\build\++ue4\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:425]
[2018.12.05-18.19.00:117][ 96]LogWindows: Error: [Callstack] 0x00007fff4ab743c9 UE4Editor-VulkanRHI.dll!FVulkanDynamicRHI::RHIRead3DSurfaceFloatData() [d:\build\++ue4\sync\engine\source\runtime\vulkanrhi\private\vulkanrendertarget.cpp:1027]
[2018.12.05-18.19.00:118][ 96]LogWindows: Error: [Callstack] 0x00007fff6d3e8e4a UE4Editor-RHI.dll!FRHICommandListImmediate::Read3DSurfaceFloatData() [d:\build\++ue4\sync\engine\source\runtime\rhi\public\rhicommandlist.h:3682]
[2018.12.05-18.19.00:118][ 96]LogWindows: Error: [Callstack] 0x00007fff4e5ef319 UE4Editor-Renderer.dll!FAtmosphericFogSceneInfo::PrecomputeTextures() [d:\build\++ue4\sync\engine\source\runtime\renderer\private\atmosphererendering.cpp:1678]
[2018.12.05-18.19.00:118][ 96]LogWindows: Error: [Callstack] 0x00007fff4e68d2bd UE4Editor-Renderer.dll!FDeferredShadingSceneRenderer::Render() [d:\build\++ue4\sync\engine\source\runtime\renderer\private\deferredshadingrenderer.cpp:1273]
[2018.12.05-18.19.00:118][ 96]LogWindows: Error: [Callstack] 0x00007fff4ebb6982 UE4Editor-Renderer.dll!RenderViewFamily_RenderThread() [d:\build\++ue4\sync\engine\source\runtime\renderer\private\scenerendering.cpp:2854]
[2018.12.05-18.19.00:118][ 96]LogWindows: Error: [Callstack] 0x00007fff4eb88fb2 UE4Editor-Renderer.dll!TGraphTask<`FRendererModule::BeginRenderingViewFamily'::`33'::EURCMacro_FDrawSceneCommand>::ExecuteTask() [d:\build\++ue4\sync\engine\source\runtime\core\public\async\taskgraphinterfaces.h:829]
[2018.12.05-18.19.00:118][ 96]LogWindows: Error: [Callstack] 0x00007fff58061f92 UE4Editor-Core.dll!FNamedTaskThread::ProcessTasksNamedThread() [d:\build\++ue4\sync\engine\source\runtime\core\private\async\taskgraph.cpp:665]
[2018.12.05-18.19.00:118][ 96]LogWindows: Error: [Callstack] 0x00007fff58062456 UE4Editor-Core.dll!FNamedTaskThread::ProcessTasksUntilQuit() [d:\build\++ue4\sync\engine\source\runtime\core\private\async\taskgraph.cpp:574]
[2018.12.05-18.19.00:118][ 96]LogWindows: Error: [Callstack] 0x00007fff829775f9 UE4Editor-RenderCore.dll!RenderingThreadMain() [d:\build\++ue4\sync\engine\source\runtime\rendercore\private\renderingthread.cpp:333]
[2018.12.05-18.19.00:118][ 96]LogWindows: Error: [Callstack] 0x00007fff82978574 UE4Editor-RenderCore.dll!FRenderingThread::Run() [d:\build\++ue4\sync\engine\source\runtime\rendercore\private\renderingthread.cpp:467]
[2018.12.05-18.19.00:118][ 96]LogWindows: Error: [Callstack] 0x00007fff584a6b7c UE4Editor-Core.dll!FRunnableThreadWin::Run() [d:\build\++ue4\sync\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:76]
[2018.12.05-18.19.00:118][ 96]LogWindows: Error: [Callstack] 0x00007fff584a17c7 UE4Editor-Core.dll!FRunnableThreadWin::GuardedRun() [d:\build\++ue4\sync\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:33]
[2018.12.05-18.19.00:118][ 96]LogWindows: Error: [Callstack] 0x00007fffa05e1fe4 KERNEL32.DLL!UnknownFunction []
[2018.12.05-18.19.00:118][ 96]LogWindows: Error: [Callstack] 0x00007fffa1c1cb81 ntdll.dll!UnknownFunction []

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Fixed

Component	UE - Graphics Features
Affects Versions	4.21.1, 4.22, 4.20.3
Target Fix	4.21.2

Fix Commit	4634420

Created	Dec 5, 2018
Resolved	Dec 5, 2018
Updated	Dec 15, 2018

UE-67234

Crash on Linux and Windows with Vulkan when adding Atmospheric Fog to a Level

Crash on Linux and Windows with Vulkan when adding Atmospheric Fog to a Level

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