Unreal Engine Issues

~FStaticMesh() can crash with race condition

UDN user reported frequent crashes in FStaticMesh::~FStaticMesh() on DrawListLinks[i]->Remove(false); Crash went away after adding critical sections to FStaticMesh::LinkDrawList(), FStaticMesh::Unl ...

UCheatManager::ToggleDebugCamera() causes crash

Toggling the Debug Camera with the UCheatManager::ToggleDebugCamera() function in a PlayerController derived class causes a crash. Tested in 4.19.2 (CL - 4033788), 4.20.3 (CL - 4369336), 4.21 (CL ...

Linux crash on Import

Attempting to import content into a project causes the editor to crash on Linux ...

Crash promoting a float pin from a split vector in Anim Blueprint

REGRESSION Yes, does not occur in 4.16. Crash occurs when the user splits a vector pin on an anim node and then tries to promote one of the float nodes to variable. I could not reproduce this issu ...

Importing User Camera FBX into Matinee in Matinee Fight Scene Crashes (UE4Editor_Renderer!CalculateShadowFadeAlpha())

Importing user provided Camera FBX will crash on closing the Matinee window in Matinee Fight Scene level. I cannot reproduce a crash in a blank project with this asset. Attached: Crash.zip - Inter ...

App on Gear VR crashes when trying to join a listen server as a client

If the user tries to join a listen server with an app that is running on the Gear VR the App will stop working. ...

Crash when moving/copying Blueprints folder into another folder

The editor crashes when the blueprints folder is moved into another folder in the sources panel This crash is similar to UE-34388 But have different callstacks. This is a Regression from 4.14.2 ...

Disabling LQ lightmaps causes crash on mobile preview

UE-47779 - Crash exiting packaged PlatformerGame while in the Main Menu

This was occurring when I quit via the Quit button in the Main Menu GUI. I also repro'd this using the "Quit" command in the console. I found this on Linux, but this was repro'd on Mac and Windows ...

Filtering a Curve with Fourier Transform (FFT) with the Response set to Chebyshev crashes the editor

When creating a Curve and filtering the keys with a Fourier Transform, the engine crashes. The engine doesn't crash when the Bake, Euler, or Simplify options. It only crashes if there are a minimum ...