This is a semi-common crash that has occurred since at least 4.17.1. The callstack is nearly identical to [Link Removed], which was fixed in 4.18.0, however the error message and source context are different. Users have not provided any descriptions of their actions when the crash occurred.
Edit, this may actually be a continuation of [Link Removed], but I've gone ahead and closed that one out.
Source Context
673 if (IndexBuffer != nullptr && IndexBuffer->Indices.Num() >= 0) 674 { 675 IndexBufferSize = IndexBuffer->Indices.Num(); 676 677 for (uint32 TriIdx = 0; TriIdx < Element.NumTriangles; TriIdx++) 678 { 679 FTriIndices Triangle; 680 681 Triangle.v0 = IndexBuffer->Indices[Element.FirstIndex + (TriIdx * 3) + 0]; 682 Triangle.v1 = IndexBuffer->Indices[Element.FirstIndex + (TriIdx * 3) + 1]; 683 Triangle.v2 = IndexBuffer->Indices[Element.FirstIndex + (TriIdx * 3) + 2]; 684 685 if (AreaThreshold >= 0.f) 686 { 687 ***** const FVector V0 = Model->VertexBuffer.Vertices[Triangle.v0].Position; 688 const FVector V1 = Model->VertexBuffer.Vertices[Triangle.v1].Position; 689 const FVector V2 = Model->VertexBuffer.Vertices[Triangle.v2].Position; 690 691 const FVector V01 = (V1 - V0); 692 const FVector V02 = (V2 - V0); 693 const FVector Cross = FVector::CrossProduct(V01, V02); 694 const float Area = Cross.Size() * 0.5f; 695 if (Area <= AreaThreshold) 696 { 697 nBadArea++; 698 continue; 699 } 700 }
repro steps currently unknown
Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\Build\++UE4+Release-4.18+Compile\Sync\Engine\Source\Runtime\Core\Public\Containers/Array.h] [Line: 610] Array index out of bounds: 1136059356 from an array of size 1624 UE4Editor_Engine!UModelComponent::GetPhysicsTriMeshData() [modelcomponent.cpp:688] UE4Editor_Engine!UBodySetup::GetCookInfo() [bodysetup.cpp:285] UE4Editor_Engine!FDerivedDataPhysXCooker::Build() [physderiveddata.cpp:93] UE4Editor_DerivedDataCache!FDerivedDataCache::FBuildAsyncWorker::DoWork() [deriveddatacache.cpp:186] UE4Editor_DerivedDataCache!FAsyncTask<FDerivedDataCache::FBuildAsyncWorker>::DoWork() [asyncwork.h:264] UE4Editor_DerivedDataCache!FAsyncTask<FDerivedDataCache::FBuildAsyncWorker>::Start() [asyncwork.h:252] UE4Editor_DerivedDataCache!FDerivedDataCache::GetSynchronous() [deriveddatacache.cpp:263] UE4Editor_Engine!UBodySetup::GetCookedData() [bodysetup.cpp:1455] UE4Editor_Engine!UBodySetup::BeginCacheForCookedPlatformData() [bodysetup.cpp:1356] UE4Editor_UnrealEd!UCookOnTheFlyServer::FinishPackageCacheForCookedPlatformData() [cookontheflyserver.cpp:1929] UE4Editor_UnrealEd!UCookOnTheFlyServer::SaveCookedPackages() [cookontheflyserver.cpp:2195] UE4Editor_UnrealEd!UCookOnTheFlyServer::TickCookOnTheSide() [cookontheflyserver.cpp:1763] UE4Editor_UnrealEd!UCookOnTheFlyServer::Tick() [cookontheflyserver.cpp:877] UE4Editor_UnrealEd!FTickableEditorObject::TickObjects() [tickableeditorobject.h:21] UE4Editor_UnrealEd!UEditorEngine::Tick() [editorengine.cpp:1433] UE4Editor_UnrealEd!UUnrealEdEngine::Tick() [unrealedengine.cpp:396] UE4Editor!FEngineLoop::Tick() [launchengineloop.cpp:3296] 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()
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There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-51780 in the post.
| 0 |
| Component | UE - Simulation - Physics |
|---|---|
| Affects Versions | 4.17, 4.18 |
| Target Fix | 4.18.1 |
| Fix Commit | 3677306 |
|---|
| Created | Oct 30, 2017 |
|---|---|
| Resolved | Oct 31, 2017 |
| Updated | Apr 27, 2018 |