This is a common crash that has occurred since at least 4.17
User Descriptions
Source Context
209 // FStaticLightingTextureMapping interface 210 void FStaticMeshStaticLightingTextureMapping::Apply(FQuantizedLightmapData* QuantizedData, const TMap<ULightComponent*,FShadowMapData2D*>& ShadowMapData, ULevel* LightingScenario) 211 { 212 UStaticMeshComponent* StaticMeshComponent = Primitive.Get(); 213 214 if (StaticMeshComponent && StaticMeshComponent->GetOwner() && StaticMeshComponent->GetOwner()->GetLevel()) 215 { 216 // Should have happened at a higher level 217 check(!StaticMeshComponent->IsRenderStateCreated()); 218 // The rendering thread reads from LODData and IrrelevantLights, therefore 219 // the component must have finished detaching from the scene on the rendering 220 // thread before it is safe to continue. 221 check(StaticMeshComponent->AttachmentCounter.GetValue() == 0); 222 223 ***** if (StaticMeshComponent->LODData.Num() != StaticMeshComponent->GetStaticMesh()->GetNumLODs()) 224 { 225 StaticMeshComponent->MarkPackageDirty(); 226 }
repro steps currently unknown
Access violation - code c0000005 (first/second chance not available) UE4Editor_Engine!FStaticMeshStaticLightingTextureMapping::Apply() [staticmeshlight.cpp:224] UE4Editor_UnrealEd!FLightmassProcessor::ProcessMapping() [lightmass.cpp:3852] UE4Editor_UnrealEd!FLightmassProcessor::ProcessAvailableMappings() [lightmass.cpp:3889] UE4Editor_UnrealEd!FLightmassProcessor::CompleteRun() [lightmass.cpp:2966] UE4Editor_UnrealEd!FStaticLightingSystem::FinishLightmassProcess() [staticlightingsystem.cpp:2083] UE4Editor_UnrealEd!FStaticLightingManager::ProcessLightingData() [staticlightingsystem.cpp:164] UE4Editor_UnrealEd!FStaticLightingSystem::UpdateLightingBuild() [staticlightingsystem.cpp:2227] UE4Editor_UnrealEd!FStaticLightingManager::UpdateBuildLighting() [staticlightingsystem.cpp:332] UE4Editor_UnrealEd!UEditorEngine::UpdateBuildLighting() [staticlightingsystem.cpp:2309] UE4Editor!FEngineLoop::Tick() [launchengineloop.cpp:3215] UE4Editor!GuardedMain() [launch.cpp:166] UE4Editor!GuardedMainWrapper() [launchwindows.cpp:134] UE4Editor!WinMain() [launchwindows.cpp:210] UE4Editor!__scrt_common_main_seh() [exe_common.inl:253] kernel32!BaseThreadInitThunk() ntdll!RtlUserThreadStart()
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-52926 in the post.