Unreal Engine Issues and Bug Tracker (UE-58687)

Description
If r.LightPropagationVolume=1 in ConsoleVariables.ini, enabling forward rendering and then restarting the editor results in a crash. This occurs in 4.18.3 and 4.19.2.
Steps to Reproduce
Open Engine/Config/ConsoleVariables.ini and add r.LightPropagationVolume=1 under [Startup]
Open new project, Enable Forward Shading in Project Settings - Rendering.
Restart Editor
Result: Crash
Callstack
LoginId:77ac66cf4b506a51a458c382c4ec63c2
EpicAccountId:5caf2c99925243e8b9b1bdcc9cd0e6cf

Assertion failed: Data [File:D:\Build\++UE4+Release-4.19+Compile\Sync\Engine\Source\Runtime\Renderer\Private\PostProcess\PostProcessInput.cpp] [Line: 21]

UE4Editor_Core!FDebug::AssertFailed() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:419]
UE4Editor_Renderer!FRCPassPostProcessInput::ComputeOutputDesc() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\renderer\private\postprocess\postprocessinput.cpp:23]
UE4Editor_Renderer!FRenderingCompositionGraph::RecursivelyGatherDependencies() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\renderer\private\postprocess\renderingcompositiongraph.cpp:334]
UE4Editor_Renderer!FRenderingCompositionGraph::RecursivelyGatherDependencies() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\renderer\private\postprocess\renderingcompositiongraph.cpp:306]
UE4Editor_Renderer!FRenderingCompositePassContext::Process() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\renderer\private\postprocess\renderingcompositiongraph.cpp:229]
UE4Editor_Renderer!FCompositionLighting::ProcessAfterBasePass() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\renderer\private\compositionlighting\compositionlighting.cpp:377]
UE4Editor_Renderer!FDeferredShadingSceneRenderer::Render() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\renderer\private\deferredshadingrenderer.cpp:1130]
UE4Editor_Renderer!RenderViewFamily_RenderThread() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\renderer\private\scenerendering.cpp:2749]
UE4Editor_Renderer!FRendererModule::BeginRenderingViewFamily() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\renderer\private\scenerendering.cpp:2983]
UE4Editor_UnrealEd!FEditorViewportClient::Draw() [d:\build\++ue4+release-4.19+compile\sync\engine\source\editor\unrealed\private\editorviewportclient.cpp:3588]
UE4Editor_Engine!FViewport::Draw() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\engine\private\unrealclient.cpp:1412]
UE4Editor_Engine!FSceneViewport::ResizeViewport() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\engine\private\slate\sceneviewport.cpp:1355]
UE4Editor_Engine!FSceneViewport::OnDrawViewport() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\engine\private\slate\sceneviewport.cpp:376]
UE4Editor_Slate!SViewport::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slate\private\widgets\sviewport.cpp:114]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:912]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:912]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:912]
UE4Editor_Slate!SCanvas::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slate\private\widgets\scanvas.cpp:116]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:912]
UE4Editor_SlateCore!SOverlay::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\soverlay.cpp:97]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:912]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:912]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35]
UE4Editor_Slate!SBorder::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slate\private\widgets\layout\sborder.cpp:85]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:912]
UE4Editor_SlateCore!SOverlay::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\soverlay.cpp:97]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:912]
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31]
UE4Editor_SlateCore!SPanel::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:12]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:912]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:912]
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31]
UE4Editor_Slate!SSplitter::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slate\private\widgets\layout\ssplitter.cpp:164]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:912]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:912]
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31]
UE4Editor_Slate!SSplitter::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slate\private\widgets\layout\ssplitter.cpp:164]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:912]
UE4Editor_SlateCore!SOverlay::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\soverlay.cpp:97]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:912]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:912]
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31]
UE4Editor_SlateCore!SPanel::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:12]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:912]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:912]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35]
UE4Editor_Slate!SBorder::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slate\private\widgets\layout\sborder.cpp:85]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:912]
UE4Editor_SlateCore!SOverlay::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\soverlay.cpp:97]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:912]
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31]
UE4Editor_SlateCore!SPanel::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:12]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:912]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:912]
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31]
UE4Editor_Slate!SSplitter::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slate\private\widgets\layout\ssplitter.cpp:164]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:912]
UE4Editor_SlateCore!SOverlay::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\soverlay.cpp:97]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:912]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:912]
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31]
UE4Editor_SlateCore!SPanel::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:12]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:912]
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:31]
UE4Editor_SlateCore!SPanel::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:12]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:912]
UE4Editor_SlateCore!SOverlay::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\soverlay.cpp:97]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:912]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:35]
UE4Editor_SlateCore!SWindow::OnPaint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\swindow.cpp:1897]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:912]
UE4Editor_Slate!FSlateApplication::DrawWindowAndChildren() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1303]
UE4Editor_Slate!FSlateApplication::PrivateDrawWindows() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1534]
UE4Editor_Slate!FSlateApplication::OnSizeChanged() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:6493]
UE4Editor_ApplicationCore!FWindowsApplication::ProcessDeferredMessage() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:1985]
UE4Editor_ApplicationCore!FWindowsApplication::DeferMessage() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:2172]
UE4Editor_ApplicationCore!FWindowsApplication::ProcessMessage() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:1009]
UE4Editor_ApplicationCore!FWindowsApplication::AppWndProc() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:726]
user32
user32
user32
ntdll
win32u
user32
user32
user32
uxtheme
uxtheme
user32
UE4Editor_ApplicationCore!FWindowsApplication::ProcessMessage() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:1411]
UE4Editor_ApplicationCore!FWindowsApplication::AppWndProc() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:726]
user32
user32
user32
ntdll
win32u
UE4Editor_ApplicationCore!FWindowsWindow::Show() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\applicationcore\private\windows\windowswindow.cpp:657]
UE4Editor_SlateCore!SWindow::ShowWindow() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\slatecore\private\widgets\swindow.cpp:1301]
UE4Editor_MainFrame!FMainFrameHandler::ShowMainFrameWindow() [d:\build\++ue4+release-4.19+compile\sync\engine\source\editor\mainframe\private\frame\mainframehandler.h:245]
UE4Editor_MainFrame!FMainFrameModule::CreateDefaultMainFrame() [d:\build\++ue4+release-4.19+compile\sync\engine\source\editor\mainframe\private\mainframemodule.cpp:229]
UE4Editor_UnrealEd!EditorInit() [d:\build\++ue4+release-4.19+compile\sync\engine\source\editor\unrealed\private\unrealedglobals.cpp:124]
UE4Editor!GuardedMain() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\launch\private\launch.cpp:150]
UE4Editor!GuardedMainWrapper() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:144]
UE4Editor!WinMain() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:223]
UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:253]
kernel32
ntdll
Have Comments or More Details?

There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-58687 in the post.
1	Login to Vote
Won't Fix
Component	UE - Graphics Features
Affects Versions	4.18.3, 4.19.2
Created	May 4, 2018
Resolved	May 8, 2018
Updated	Jun 4, 2018
View Jira Issue
UE-58687

Editor Crashes on Startup After Enabling Forward Shading When r.LightPropagationVolume=1

Editor Crashes on Startup After Enabling Forward Shading When r.LightPropagationVolume=1

Have Comments or More Details?
