Unreal Engine Issues

Niagara crash when using a particle attribute reader that has been passed around between modules

The following Niagara usage pattern results in either a crash or in incorrect data being read from a Particle Attribute Reader: Emitter Spawn Stage – A module has an Attribute Reader input specifie ...

Sequencer causes 3DWidget on BP vectors to snap to Actor when active

When we have Vectors in BP with Show 3D Widget enabled, the Transform Widget would always snap back to the Actor after we move the 3D Widget in-world. [Link Removed] Removing the _DaySequenceActor ...

[CrashReport][Crash] UnrealEditor-Core!IMemoryReadStream::CopyTo()

Intermittent crash in virtual texture transcode. Usually mempy from nullptr but also occasionally we see the same callstack with memcpy to random location. ...

Chaos : Crash when destroying part of Geometry collections clustered by AnchorField

Here's a workaround void DestroyParticle(TGeometryParticleHandle<T, d>* Particle) { auto PBDRigid = Particle->CastToRigidParticle(); if(PBDRigid) { RemoveFromMapAndArray(PBDRigid, Ac ...

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

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

A Simulating Physics component with StartAwake = false will be awoken by a Welded component

A Simulating Physics component with StartAwake = false will be awoken by a Welded component If a welding occurs during the call to OnCreatePhysicsState, this breaks the start awake disabled flag. Th ...

Linux crashes in the Project Browser without using the -nocef command

When opening Unreal Editor on Linux, the Project Browser opens but is completely unresponsive. Shortly afterwards the editor will crash. If you use the -nocef command when opening the Editor, everyt ...

Download of Starter pack sometimes fails

Adding "_API" specifier to FMovieSceneTrackEditor results in linker errors

Unable to add API specifier to FMovieSceneTrackEditor, results in compile errors (pasted in the callstack field) ...

[AI] Crash when gathering heightfield geometry on worker thread

From the body of the ticket: We aim to do as much of the work off the game thread as possible to avoid impacting frame rate. We've recently found a crash during collection of the geometry slices fr ...