Unreal Engine Issues and Bug Tracker (UE-219392)

Description

Crashes when playing Niagara particles with the following conditions enabled. It crashes only when stompmalloc is enabled, not when disabled.

Enable Ray tracing
Enable Compress Attributes in System Properties Performance
SimTarget is CPUSim
Has a mesh renderer
Mesh Scale Mode in Mesh Attributes of Initialize Particle is set to other than Unset or Initial Mesh Orientation is used.

Steps to Reproduce

1. Unzip the attached sample project
2. Launch the project with "-stompmalloc" argument
3. Crash when open the project and play niagara effect.

Callstack

UnrealEditor-Niagara.dll!FNiagaraRendererMeshes::GetDynamicRayTracingInstances(FRayTracingMaterialGatheringContext & Context, TArray<FRayTracingInstance,TSizedDefaultAllocator<32>> & OutRayTracingInstances, const FNiagaraSceneProxy * SceneProxy) Line 1935    C++
UnrealEditor-Niagara.dll!FNiagaraSystemRenderData::GetDynamicRayTracingInstances(FRayTracingMaterialGatheringContext & Context, TArray<FRayTracingInstance,TSizedDefaultAllocator<32>> & OutRayTracingInstances, const FNiagaraSceneProxy & SceneProxy) Line 243    C++
UnrealEditor-Renderer.dll!RayTracing::GatherWorldInstancesForView(FRDGBuilder & GraphBuilder, FScene & Scene, FViewInfo & View, FRayTracingScene & RayTracingScene, FGlobalDynamicReadBuffer & InDynamicReadBuffer, TConcurrentLinearBulkObjectAllocator<FSceneRenderingBlockAllocationTag> & InBulkAllocator, RayTracing::FRelevantPrimitiveList & RelevantPrimitiveList) Line 826    C++
UnrealEditor-Renderer.dll!FDeferredShadingSceneRenderer::Render(FRDGBuilder & GraphBuilder) Line 1898    C++
UnrealEditor-Renderer.dll!RenderViewFamilies_RenderThread(FRHICommandListImmediate & RHICmdList, const TArray<FSceneRenderer *,TSizedDefaultAllocator<32>> & SceneRenderers) Line 4833    C++
UnrealEditor-Renderer.dll!FRendererModule::BeginRenderingViewFamilies::__l89::<lambda_3>::operator()(FRHICommandListImmediate & RHICmdList) Line 5122    C++
[Inline Frame] UnrealEditor-RenderCore.dll!UE::Core::Private::Function::TFunctionRefBase<UE::Core::Private::Function::TFunctionStorage<1>,void __cdecl(FRHICommandListImmediate &)>::operator()(FRHICommandListImmediate &) Line 555    C++
UnrealEditor-RenderCore.dll!FRenderThreadCommandPipe::EnqueueAndLaunch::__l5::<lambda_1>::operator()() Line 1751    C++
[Inline Frame] UnrealEditor-RenderCore.dll!UE::Core::Private::Function::TFunctionRefBase<UE::Core::Private::Function::TFunctionStorage<1>,void __cdecl(void)>::operator()() Line 555    C++
[Inline Frame] UnrealEditor-RenderCore.dll!TFunctionGraphTaskImpl<void __cdecl(void),1>::DoTaskImpl(TUniqueFunction<void __cdecl(void)> & Function, ENamedThreads::Type) Line 1733    C++
[Inline Frame] UnrealEditor-RenderCore.dll!TFunctionGraphTaskImpl<void __cdecl(void),1>::DoTask(ENamedThreads::Type) Line 1726    C++
UnrealEditor-RenderCore.dll!TGraphTask<TFunctionGraphTaskImpl<void __cdecl(void),1>>::ExecuteTask(TArray<FBaseGraphTask *,TSizedDefaultAllocator<32>> & NewTasks, ENamedThreads::Type CurrentThread, bool bDeleteOnCompletion) Line 1235    C++
[Inline Frame] UnrealEditor-Core.dll!FBaseGraphTask::Execute(TArray<FBaseGraphTask *,TSizedDefaultAllocator<32>> & CurrentThread, ENamedThreads::Type) Line 840    C++
UnrealEditor-Core.dll!FNamedTaskThread::ProcessTasksNamedThread(int QueueIndex, bool bAllowStall) Line 760    C++
UnrealEditor-Core.dll!FNamedTaskThread::ProcessTasksUntilQuit(int QueueIndex) Line 651    C++
UnrealEditor-RenderCore.dll!RenderingThreadMain(FEvent * TaskGraphBoundSyncEvent) Line 413    C++
UnrealEditor-RenderCore.dll!FRenderingThread::Run() Line 566    C++
UnrealEditor-Core.dll!FRunnableThreadWin::Run() Line 149    C++
UnrealEditor-Core.dll!FRunnableThreadWin::GuardedRun() Line 71    C++
[External Code]

Community References

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Fixed

Component	UE - Niagara
Affects Versions	5.4
Target Fix	5.5

Fix Commit	32833526

Created	Jul 16, 2024
Resolved	Jul 16, 2024
Updated	Aug 13, 2024

View Jira Issue

UE-219392

Crash when playing NiagaraSystem with mesh renderer in CPUSim with Compress Attributes enabled when stompmalloc is enabled

Crash when playing NiagaraSystem with mesh renderer in CPUSim with Compress Attributes enabled when stompmalloc is enabled

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