When setting the Kill Particles boolean of an emitter in a Niagara System to true, the editor crashes. So far, I've only been able to reproduce the issue with the NS_EH_KP system that a user provided for the repro. When trying to create a similar Niagara System from scratch I've been unable to reproduce the issue.
The user also added additional info: "The crash consistently happens when an emitter receives location data from another spawning emitter, "requires persistent ID" checked and activates "Kill Particles" module under the Event Handler."
RESULT:
The editor crashes
EXPECTED:
The editor doesn't crash when setting Kill Particles to true
=== Critical error: === Assertion failed: FreeIDTable.Num() >= NumFreeIDs + Data.IDsToFree.Num() [File:D:/Build/++UE4/Sync/Engine/Source/Runtime/VectorVM/Private/VectorVM.cpp] [Line: 535] [Callstack] 0x00007ffdc8e03b19 KERNELBASE.dll!UnknownFunction [] [Callstack] 0x00007ffd5600d066 UE4Editor-Core.dll!ReportAssert() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Private\Windows\WindowsPlatformCrashContext.cpp:1616] [Callstack] 0x00007ffd560107a8 UE4Editor-Core.dll!FWindowsErrorOutputDevice::Serialize() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Private\Windows\WindowsErrorOutputDevice.cpp:78] [Callstack] 0x00007ffd55d1e8cd UE4Editor-Core.dll!FOutputDevice::LogfImpl() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Private\Misc\OutputDevice.cpp:61] [Callstack] 0x00007ffd55cb5575 UE4Editor-Core.dll!AssertFailedImplV() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Private\Misc\AssertionMacros.cpp:104] [Callstack] 0x00007ffd55cb7620 UE4Editor-Core.dll!FDebug::CheckVerifyFailedImpl() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Private\Misc\AssertionMacros.cpp:461] [Callstack] 0x00007ffd40ce5095 UE4Editor-VectorVM.dll!FVectorVMContext::FinishExec() [D:\Build\++UE4\Sync\Engine\Source\Runtime\VectorVM\Private\VectorVM.cpp:535] [Callstack] 0x00007ffd40ccd47e UE4Editor-VectorVM.dll!<lambda_066d89be679256fc91d65acb4f3cb5d9>::operator()() [D:\Build\++UE4\Sync\Engine\Source\Runtime\VectorVM\Private\VectorVM.cpp:2690] [Callstack] 0x00007ffd40ce4628 UE4Editor-VectorVM.dll!VectorVM::Exec() [D:\Build\++UE4\Sync\Engine\Source\Runtime\VectorVM\Private\VectorVM.cpp:2698] [Callstack] 0x00007ffd343b5b3e UE4Editor-Niagara.dll!FNiagaraScriptExecutionContextBase::Execute() [D:\Build\++UE4\Sync\Engine\Plugins\FX\Niagara\Source\Niagara\Private\NiagaraScriptExecutionContext.cpp:165] [Callstack] 0x00007ffd34323f3e UE4Editor-Niagara.dll!FNiagaraEmitterInstance::Tick() [D:\Build\++UE4\Sync\Engine\Plugins\FX\Niagara\Source\Niagara\Private\NiagaraEmitterInstance.cpp:1537] [Callstack] 0x00007ffd343f3480 UE4Editor-Niagara.dll!FNiagaraSystemInstance::Tick_Concurrent() [D:\Build\++UE4\Sync\Engine\Plugins\FX\Niagara\Source\Niagara\Private\NiagaraSystemInstance.cpp:2189] [Callstack] 0x00007ffd343bc5ae UE4Editor-Niagara.dll!FNiagaraSystemSimulation::FlushTickBatch() [D:\Build\++UE4\Sync\Engine\Plugins\FX\Niagara\Source\Niagara\Private\NiagaraSystemSimulation.cpp:790] [Callstack] 0x00007ffd343f4967 UE4Editor-Niagara.dll!FNiagaraSystemSimulation::Tick_Concurrent() [D:\Build\++UE4\Sync\Engine\Plugins\FX\Niagara\Source\Niagara\Private\NiagaraSystemSimulation.cpp:1338] [Callstack] 0x00007ffd343f7280 UE4Editor-Niagara.dll!FNiagaraSystemSimulation::Tick_GameThread() [D:\Build\++UE4\Sync\Engine\Plugins\FX\Niagara\Source\Niagara\Private\NiagaraSystemSimulation.cpp:1023] [Callstack] 0x00007ffd343cb235 UE4Editor-Niagara.dll!FNiagaraSystemInstance::ManualTick() [D:\Build\++UE4\Sync\Engine\Plugins\FX\Niagara\Source\Niagara\Private\NiagaraSystemInstance.cpp:2016] [Callstack] 0x00007ffd341074b1 UE4Editor-Niagara.dll!UNiagaraComponent::TickComponent() [D:\Build\++UE4\Sync\Engine\Plugins\FX\Niagara\Source\Niagara\Private\NiagaraComponent.cpp:680] [Callstack] 0x00007ffd52f30b43 UE4Editor-Engine.dll!FActorComponentTickFunction::ExecuteTickHelper<<lambda_1634216a1cfe6570ddb9ff9456c1b5fb> >() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Classes\GameFramework\Actor.h:3573] [Callstack] 0x00007ffd52f65244 UE4Editor-Engine.dll!FActorComponentTickFunction::ExecuteTick() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\Components\ActorComponent.cpp:1014] [Callstack] 0x00007ffd53d8297e UE4Editor-Engine.dll!FTickFunctionTask::DoTask() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\TickTaskManager.cpp:284] [Callstack] 0x00007ffd53d8b56f UE4Editor-Engine.dll!TGraphTask<FTickFunctionTask>::ExecuteTask() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Public\Async\TaskGraphInterfaces.h:886] [Callstack] 0x00007ffd55acecdc UE4Editor-Core.dll!FNamedTaskThread::ProcessTasksNamedThread() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Private\Async\TaskGraph.cpp:709] [Callstack] 0x00007ffd55acf0ce UE4Editor-Core.dll!FNamedTaskThread::ProcessTasksUntilQuit() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Private\Async\TaskGraph.cpp:601] [Callstack] 0x00007ffd55ae08fd UE4Editor-Core.dll!FTaskGraphImplementation::WaitUntilTasksComplete() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Private\Async\TaskGraph.cpp:1525] [Callstack] 0x00007ffd53da8464 UE4Editor-Engine.dll!FTickTaskSequencer::ReleaseTickGroup() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\TickTaskManager.cpp:564] [Callstack] 0x00007ffd53daedaa UE4Editor-Engine.dll!FTickTaskManager::RunTickGroup() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\TickTaskManager.cpp:1578] [Callstack] 0x00007ffd534cad8f UE4Editor-Engine.dll!UWorld::RunTickGroup() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\LevelTick.cpp:782] [Callstack] 0x00007ffd534d55f7 UE4Editor-Engine.dll!UWorld::Tick() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\LevelTick.cpp:1457] [Callstack] 0x00007ffd33aff46c UE4Editor-NiagaraEditor.dll!FNiagaraSystemViewportClient::Tick() [D:\Build\++UE4\Sync\Engine\Plugins\FX\Niagara\Source\NiagaraEditor\Private\Widgets\SNiagaraSystemViewport.cpp:102] [Callstack] 0x00007ffd513f97bd UE4Editor-UnrealEd.dll!UEditorEngine::Tick() [D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\EditorEngine.cpp:1793] [Callstack] 0x00007ffd51d150e6 UE4Editor-UnrealEd.dll!UUnrealEdEngine::Tick() [D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\UnrealEdEngine.cpp:426] [Callstack] 0x00007ff6dfd09bc2 UE4Editor.exe!FEngineLoop::Tick() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:4836] [Callstack] 0x00007ff6dfd2117c UE4Editor.exe!GuardedMain() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\Launch.cpp:169] [Callstack] 0x00007ff6dfd2125a UE4Editor.exe!GuardedMainWrapper() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:137] [Callstack] 0x00007ff6dfd352bd UE4Editor.exe!WinMain() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:268] [Callstack] 0x00007ff6dfd37fea UE4Editor.exe!__scrt_common_main_seh() [d:\agent\_work\5\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288] [Callstack] 0x00007ffdcb3d7c24 KERNEL32.DLL!UnknownFunction [] [Callstack] 0x00007ffdcb52d721 ntdll.dll!UnknownFunction []
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| 0 |
| Component | UE - Niagara |
|---|---|
| Affects Versions | 4.26.2 |
| Target Fix | 5.0 |
| Created | May 20, 2021 |
|---|---|
| Resolved | Jun 8, 2021 |
| Updated | Dec 1, 2022 |