Unreal Engine Issues

PIE crash due to non-empty ULevel::DestroyedReplicatedStaticActors array

It's possible to end up in a state where some entries were saved in ULevel::DestroyedReplicatedStaticActors, which causes a crash when PIE starts up. I'm not sure how entries could end up in this l ...

Crash: Device Lost after enabling SM6 within EngineTest and QAGame

This is marked as a regression as the option to set SM6 within the project setting is new.Testing on NVIDIA as we speak Issue with the same repro steps is not an issue on an NVIDIA 3000 series card ...

Niagara editor crash

Crash when using AnimBudgetAllocator

In the AnimNode_Slot code, It seems that update() and evaluate() should be called by following order because in TickAnimation step, we need to make MontageEvaluateData valid.SkeletalMeshComponent::U ...

Opening Sprite assets or Paper Flipbook crashes the engine in 5.3

Licensee was not able to open any Sprite asset file in 5.3 without it causing a crash. They were able to avoid this by disabling raytracing in the project. ...

Directx12 crashes with OOM

In editor, when running a task that does not issue a BeginFrame/EndFrame for a long time, the GPU will eventually run out of memory.  See UDN: https://udn.unrealengine.com/questions/431450/directx1 ...

Crash when baking materials for some skeletal meshes (like those found in Epic's Car Configurator project)

FMeshMergeHelpers::RetrieveMesh crashes when trying to prep some skeletal meshes for material baking. ...

Crash clicking on "Recent Levels" or "Package Project" in File menu

I tried to debug. In:for (int32 StackIndex = Stack.Num() - 1; StackIndex >= FirstStackIndexToRemove; --StackIndex) { Stack[StackIndex]->Dismiss(); // <-- here } It crashes because Stack is em ...

Crash when breaking Level Instance within Data Layer Asset

A crash occurs when breaking a level instance contained in a data layer.  This does not occur in 5.0.3, however the behaviors of Data Layers are different in 5.1 where the Data Layer asset is added ...

Crash on Mac for some 4.16 users while opening editor, related to Xcode

This is a common crash on Mac in the 4.16 release. The callstack is fairly generic , so it shares similarities with other Jiras such as [Link Removed] and [Link Removed], but this issue is differen ...