Unreal Engine Issues

UE4Editor is crashing after user builds lighting

Issue reported by user that they are experiencing consistent crashes in UE4Editor have building lighting. ...

Crash undoing "replace actor with" when replaced object constructs child actors

The problem seems to be that the construction scripts doubled up all the BlueprintCreatedComponents, so there are now 2 scene components(actually the same one duplicated) and now 2 child actor compo ...

[CrashReport] Linux crash - FVulkanSwapChain::AcquireImageIndex

This is an uncommon Linux crash that has occurred for a few users in 4.17 and 4.18 (not yet released) ...

[CrashReport] Linux crash - llvm::TargetLowering::LowerCallTo()

This is a common Linux crash in 4.16.2. ...

Project crashes when exiting mobile preview

User project crashes when exiting from mobile preview. Frequency: 5/5 Crashreporter: [Link Removed] ...

[CrashReport] Linux crash - FStatsThreadState::ProcessNonFrameStats

This is a somewhat common Linux crash that has occurred since 4.16. The callstack shares some similarities to [Link Removed] ...

Crash - console command stat none

UInstancedStaticMeshComponentRemoveInstances crashes if called with an empty array

This looks like it can be fixed with an early-out when the passed array of indices is empty. Log:[2024.01.03-16.38.36:091][291]LogOutputDevice: Warning: Script Stack (1 frames) : /Game/BP_Crashy.B ...

InstanceData->SetInstance crash when transforming InstancedStaticMesh

When updating InstanceStaticMesh transform from C++ or BP, UpdateInstanceTransform then FStaticMeshInstanceBuffer::UpdateInstanceData gets called. Sometimes InstanceData->SetInstance in FStaticMeshI ...

Crash in FMediaPlayerBase::TickPlayer in Shipping builds

A crash can occur in FMediaPlayerBase::TickPlayer in Shipping builds. This is because FMediaPlayerBase::NativePlayer is not a thread-safe shared pointer. The fix is to make it ESPMode::ThreadSafe. ...