Unreal Engine Issues

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. ...

Crash - console command stat none

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. ...

Crash when using "Convert to Variable Curve"

Error message: Access violation - code c0000005 (first/second chance not available) Source Context: 7 8 DECLARE_CYCLE_STAT(TEXT("AnimSeq EvalCurveData"), STAT_AnimSeq_EvalCurv ...

Game crashes when Panini projection enabled.

Blueprint Struct associations in Blueprint hierarchy causes command line cooker to crash

If a user creates a specific Blueprint hierarchy with a Blueprint struct, it can cause a issue when the Blueprint struct is being cooked. User description of Blueprint(s) and Blueprint Struct relat ...

Crash when setting Anim to "None" with URO

A Crash can occur when setting a skeletal mesh's animation instance to None when it has Update Rate Optimizations enabled. An unverified proposed fix for this is to remove the nullptr check when ...