Niagara components don't null check their tick functions, and can cause a crash as a result. Compare to UParticleSystemComponent::TickComponent which does. It's fairly common in the engine to pass nullptr in for the tick function as well.
RESULT
The editor crashes
Fatal error!
Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000020
0x00007ffd9ea4d7c0 UE4Editor-Engine.dll!FTickFunction::IsCompletionHandleValid() [D:\_Release-4.26\Engine\Source\Runtime\Engine\Classes\Engine\EngineBaseTypes.h:311]
0x00007ffd8f997202 UE4Editor-Niagara.dll!UNiagaraComponent::TickComponent() [D:\_Release-4.26\Engine\Plugins\FX\Niagara\Source\Niagara\Private\NiagaraComponent.cpp:649]
0x00007ffd9eb027fa UE4Editor-Engine.dll!AActor::TickActor() [D:\_Release-4.26\Engine\Source\Runtime\Engine\Private\Actor.cpp:1093]
0x00007ffd9eace8ee UE4Editor-Engine.dll!FActorTickFunction::ExecuteTick() [D:\_Release-4.26\Engine\Source\Runtime\Engine\Private\Actor.cpp:173]
0x00007ffd9fcb2fe9 UE4Editor-Engine.dll!FTickFunctionTask::DoTask() [D:\_Release-4.26\Engine\Source\Runtime\Engine\Private\TickTaskManager.cpp:284]
0x00007ffd9fcbbc60 UE4Editor-Engine.dll!TGraphTask<FTickFunctionTask>::ExecuteTask() [D:\_Release-4.26\Engine\Source\Runtime\Core\Public\Async\TaskGraphInterfaces.h:886]
0x00007ffda19ee864 UE4Editor-Core.dll!FNamedTaskThread::ProcessTasksNamedThread() [D:\_Release-4.26\Engine\Source\Runtime\Core\Private\Async\TaskGraph.cpp:709]
0x00007ffda19eec6e UE4Editor-Core.dll!FNamedTaskThread::ProcessTasksUntilQuit() [D:\_Release-4.26\Engine\Source\Runtime\Core\Private\Async\TaskGraph.cpp:601]
0x00007ffda1a0051e UE4Editor-Core.dll!FTaskGraphImplementation::WaitUntilTasksComplete() [D:\_Release-4.26\Engine\Source\Runtime\Core\Private\Async\TaskGraph.cpp:1525]
0x00007ffd9fcd8efe UE4Editor-Engine.dll!FTickTaskSequencer::ReleaseTickGroup() [D:\_Release-4.26\Engine\Source\Runtime\Engine\Private\TickTaskManager.cpp:564]
0x00007ffd9fcdf85a UE4Editor-Engine.dll!FTickTaskManager::RunTickGroup() [D:\_Release-4.26\Engine\Source\Runtime\Engine\Private\TickTaskManager.cpp:1578]
0x00007ffd9f3f8acf UE4Editor-Engine.dll!UWorld::RunTickGroup() [D:\_Release-4.26\Engine\Source\Runtime\Engine\Private\LevelTick.cpp:782]
0x00007ffd9f403399 UE4Editor-Engine.dll!UWorld::Tick() [D:\_Release-4.26\Engine\Source\Runtime\Engine\Private\LevelTick.cpp:1457]
0x00007ffd9c601896 UE4Editor-UnrealEd.dll!UEditorEngine::Tick() [D:\_Release-4.26\Engine\Source\Editor\UnrealEd\Private\EditorEngine.cpp:1720]
0x00007ffd9cf3b046 UE4Editor-UnrealEd.dll!UUnrealEdEngine::Tick() [D:\_Release-4.26\Engine\Source\Editor\UnrealEd\Private\UnrealEdEngine.cpp:426]
0x00007ff6f38b9bdd UE4Editor.exe!FEngineLoop::Tick() [D:\_Release-4.26\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:4836]
0x00007ff6f38d11dc UE4Editor.exe!GuardedMain() [D:\_Release-4.26\Engine\Source\Runtime\Launch\Private\Launch.cpp:169]
0x00007ff6f38d12ba UE4Editor.exe!GuardedMainWrapper() [D:\_Release-4.26\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:137]
0x00007ff6f38e528d UE4Editor.exe!WinMain() [D:\_Release-4.26\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:268]
0x00007ff6f38e7faa UE4Editor.exe!__scrt_common_main_seh() [D:\agent\_work\9\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288]
0x00007ffe18877034 KERNEL32.DLL!UnknownFunction []
0x00007ffe19ddd241 ntdll.dll!UnknownFunction []
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There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-110618 in the post.
1 |
Component | UE - Niagara |
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Affects Versions | 4.26 |
Target Fix | 4.27 |
Fix Commit | 15753470 |
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Created | Mar 12, 2021 |
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Resolved | Mar 20, 2021 |
Updated | Nov 30, 2022 |