Description

A crash occurs when the console command “showflag.rendering 0” is executed. This does not occur in UE5.5, so it is a iassue in UE5.6.

Steps to Reproduce
  1. Open the any project
  2. Execute "showflag.rendering 0" command
Callstack
Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:C:\Engine\P4\Engine\Source\Runtime\Core\Public\Containers\Array.h] [Line: 1067] 
Array index out of bounds: 0 into an array of size 0


UnrealEditor_Core!FDebug::CheckVerifyFailedImpl2() [C:\Engine\P4\Engine\Source\Runtime\Core\Private\Misc\AssertionMacros.cpp:728]
UnrealEditor_Renderer!`FSceneRenderProcessor::Execute'::`30'::<lambda_4>::operator()() [C:\Engine\P4\Engine\Source\Runtime\Renderer\Private\SceneRenderBuilder.cpp:878]
UnrealEditor_RenderCore!`FRenderThreadCommandPipe::EnqueueAndLaunch'::`5'::<lambda_1>::operator()() [C:\Engine\P4\Engine\Source\Runtime\RenderCore\Private\RenderingThread.cpp:1547]
UnrealEditor_RenderCore!TGraphTask<TFunctionGraphTaskImpl<void __cdecl(void),1> >::ExecuteTask() [C:\Engine\P4\Engine\Source\Runtime\Core\Public\Async\TaskGraphInterfaces.h:706]
UnrealEditor_Core!UE::Tasks::Private::FTaskBase::TryExecuteTask() [C:\Engine\P4\Engine\Source\Runtime\Core\Public\Tasks\TaskPrivate.h:527]
UnrealEditor_Core!FNamedTaskThread::ProcessTasksNamedThread() [C:\Engine\P4\Engine\Source\Runtime\Core\Private\Async\TaskGraph.cpp:779]
UnrealEditor_Core!FNamedTaskThread::ProcessTasksUntilQuit() [C:\Engine\P4\Engine\Source\Runtime\Core\Private\Async\TaskGraph.cpp:668]
UnrealEditor_RenderCore!RenderingThreadMain() [C:\Engine\P4\Engine\Source\Runtime\RenderCore\Private\RenderingThread.cpp:318]
UnrealEditor_RenderCore!FRenderingThread::Run() [C:\Engine\P4\Engine\Source\Runtime\RenderCore\Private\RenderingThread.cpp:451]
UnrealEditor_Core!FRunnableThreadWin::Run() [C:\Engine\P4\Engine\Source\Runtime\Core\Private\Windows\WindowsRunnableThread.cpp:159]

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Backlogged
ComponentUE - Rendering Architecture
Affects Versions5.6
Target Fix5.7
CreatedJul 10, 2025
UpdatedAug 11, 2025
View Jira Issue