It seems that the crash is related to all of the "Write" events. I tested the Event ChaosDestruction Write, Event Float Write, and Event Bool Write and all 3 caused the crash, but their "Read" counterparts did not cause a crash.
Creating an empty Niagara System and adding these doesn't cause a crash, so this only occurs when there is an emitter in the System.
Tested in //UE4/Release-4.25 @ CL 14469661 and this occurred, so not marking this bug as a Regression.
RESULT:
The engine crashes
EXPECTED:
The user would be able to add the Event Bool Write node without crashing
Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Public\Containers/ArrayView.h] [Line: 191] Array index out of bounds: 437 from an array of size 0 [Callstack] 0x00007ffac64c3b19 KERNELBASE.dll!UnknownFunction [] [Callstack] 0x00007ffa6866d066 UE4Editor-Core.dll!ReportAssert() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Private\Windows\WindowsPlatformCrashContext.cpp:1616] [Callstack] 0x00007ffa686707a8 UE4Editor-Core.dll!FWindowsErrorOutputDevice::Serialize() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Private\Windows\WindowsErrorOutputDevice.cpp:78] [Callstack] 0x00007ffa6837e8cd UE4Editor-Core.dll!FOutputDevice::LogfImpl() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Private\Misc\OutputDevice.cpp:61] [Callstack] 0x00007ffa68315575 UE4Editor-Core.dll!AssertFailedImplV() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Private\Misc\AssertionMacros.cpp:104] [Callstack] 0x00007ffa68317620 UE4Editor-Core.dll!FDebug::CheckVerifyFailedImpl() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Private\Misc\AssertionMacros.cpp:461] [Callstack] 0x00007ffa4f9cc578 UE4Editor-VectorVM.dll!DispatchCheckVerify<void,<lambda_d6f51ebde1563f7d54157f1336e1c313> >() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Public\Misc\AssertionMacros.h:165] [Callstack] 0x00007ffa4f992b66 UE4Editor-VectorVM.dll!FBatchedWriteIndexedOutput::CopyConstantToOutput<float,float,0>() [D:\Build\++UE4\Sync\Engine\Source\Runtime\VectorVM\Private\VectorVM.cpp:3209] [Callstack] 0x00007ffa4f998685 UE4Editor-VectorVM.dll!<lambda_066d89be679256fc91d65acb4f3cb5d9>::operator()() [D:\Build\++UE4\Sync\Engine\Source\Runtime\VectorVM\Private\VectorVM.cpp:2551] [Callstack] 0x00007ffa4f9b4628 UE4Editor-VectorVM.dll!VectorVM::Exec() [D:\Build\++UE4\Sync\Engine\Source\Runtime\VectorVM\Private\VectorVM.cpp:2698] [Callstack] 0x00007ffa4a9d5b3e UE4Editor-Niagara.dll!FNiagaraScriptExecutionContextBase::Execute() [D:\Build\++UE4\Sync\Engine\Plugins\FX\Niagara\Source\Niagara\Private\NiagaraScriptExecutionContext.cpp:165] [Callstack] 0x00007ffa4aa1c3dc UE4Editor-Niagara.dll!FNiagaraSystemSimulation::UpdateSystemInstances() [D:\Build\++UE4\Sync\Engine\Plugins\FX\Niagara\Source\Niagara\Private\NiagaraSystemSimulation.cpp:1570] [Callstack] 0x00007ffa4aa14859 UE4Editor-Niagara.dll!FNiagaraSystemSimulation::Tick_Concurrent() [D:\Build\++UE4\Sync\Engine\Plugins\FX\Niagara\Source\Niagara\Private\NiagaraSystemSimulation.cpp:1329] [Callstack] 0x00007ffa4aa17280 UE4Editor-Niagara.dll!FNiagaraSystemSimulation::Tick_GameThread() [D:\Build\++UE4\Sync\Engine\Plugins\FX\Niagara\Source\Niagara\Private\NiagaraSystemSimulation.cpp:1023] [Callstack] 0x00007ffa4a9eb235 UE4Editor-Niagara.dll!FNiagaraSystemInstance::ManualTick() [D:\Build\++UE4\Sync\Engine\Plugins\FX\Niagara\Source\Niagara\Private\NiagaraSystemInstance.cpp:2016] [Callstack] 0x00007ffa4a7274b1 UE4Editor-Niagara.dll!UNiagaraComponent::TickComponent() [D:\Build\++UE4\Sync\Engine\Plugins\FX\Niagara\Source\Niagara\Private\NiagaraComponent.cpp:680] [Callstack] 0x00007ffa64e50b43 UE4Editor-Engine.dll!FActorComponentTickFunction::ExecuteTickHelper<<lambda_1634216a1cfe6570ddb9ff9456c1b5fb> >() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Classes\GameFramework\Actor.h:3573] [Callstack] 0x00007ffa64e85244 UE4Editor-Engine.dll!FActorComponentTickFunction::ExecuteTick() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\Components\ActorComponent.cpp:1014] [Callstack] 0x00007ffa65ca297e UE4Editor-Engine.dll!FTickFunctionTask::DoTask() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\TickTaskManager.cpp:284] [Callstack] 0x00007ffa65cab56f UE4Editor-Engine.dll!TGraphTask<FTickFunctionTask>::ExecuteTask() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Public\Async\TaskGraphInterfaces.h:886] [Callstack] 0x00007ffa6812ecdc UE4Editor-Core.dll!FNamedTaskThread::ProcessTasksNamedThread() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Private\Async\TaskGraph.cpp:709] [Callstack] 0x00007ffa6812f0ce UE4Editor-Core.dll!FNamedTaskThread::ProcessTasksUntilQuit() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Private\Async\TaskGraph.cpp:601] [Callstack] 0x00007ffa681408fd UE4Editor-Core.dll!FTaskGraphImplementation::WaitUntilTasksComplete() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Private\Async\TaskGraph.cpp:1525] [Callstack] 0x00007ffa65cc8464 UE4Editor-Engine.dll!FTickTaskSequencer::ReleaseTickGroup() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\TickTaskManager.cpp:564] [Callstack] 0x00007ffa65ccedaa UE4Editor-Engine.dll!FTickTaskManager::RunTickGroup() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\TickTaskManager.cpp:1578] [Callstack] 0x00007ffa653ead8f UE4Editor-Engine.dll!UWorld::RunTickGroup() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\LevelTick.cpp:782] [Callstack] 0x00007ffa653f55f7 UE4Editor-Engine.dll!UWorld::Tick() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\LevelTick.cpp:1457] [Callstack] 0x00007ffa4a11f46c UE4Editor-NiagaraEditor.dll!FNiagaraSystemViewportClient::Tick() [D:\Build\++UE4\Sync\Engine\Plugins\FX\Niagara\Source\NiagaraEditor\Private\Widgets\SNiagaraSystemViewport.cpp:102] [Callstack] 0x00007ffa62e597bd UE4Editor-UnrealEd.dll!UEditorEngine::Tick() [D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\EditorEngine.cpp:1793] [Callstack] 0x00007ffa637750e6 UE4Editor-UnrealEd.dll!UUnrealEdEngine::Tick() [D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\UnrealEdEngine.cpp:426] [Callstack] 0x00007ff6c2709bc2 UE4Editor.exe!FEngineLoop::Tick() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:4836] [Callstack] 0x00007ff6c272117c UE4Editor.exe!GuardedMain() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\Launch.cpp:169] [Callstack] 0x00007ff6c272125a UE4Editor.exe!GuardedMainWrapper() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:137] [Callstack] 0x00007ff6c27352bd UE4Editor.exe!WinMain() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:268] [Callstack] 0x00007ff6c2737fea UE4Editor.exe!__scrt_common_main_seh() [d:\agent\_work\5\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288] [Callstack] 0x00007ffac6ec7c24 KERNEL32.DLL!UnknownFunction [] [Callstack] 0x00007ffac874d721 ntdll.dll!UnknownFunction []
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| 0 |
| Component | UE - Niagara |
|---|---|
| Affects Versions | 4.25.4, 4.26.2 |
| Target Fix | 4.27 |
| Created | May 13, 2021 |
|---|---|
| Resolved | Jun 1, 2021 |
| Updated | Jul 20, 2021 |