Crash in when setting label in ChildActor

In void ATestActor::OnConstruction(const FTransform& Transform) there is an infinite loop occuring in a ping pong call between the SetActorLabel and the DestroyChildActor calls. Happens in vanil ...

Crash When Adding a Second Vector Parameter to Material Parameter Collection

Rendering - Feb 21, 2019

The Editor will crash if you add more than one vector parameter to a Material Parameter Collection.  This works as expected in 4.21 CL# 4753647 Found in 4.22 Preview 2 CL# 5035897 and 4.23 CL# 506 ...

[CrashReport] UE4Editor-Core!FDebug::CheckVerifyFailedImpl(char const *,char const *,int,wchar_t const *,...) [AssertionMacros.cpp:418]

Rendering - RHI - Feb 15, 2019

Two comments from users:Running in -dx12 mode to test raytracinglaunching editor Generated from CrashReporter ...

Malformed command sent to UAT if BuildCookRun command ends with a trailing slash ("\")

DevTools - Feb 14, 2019

Including a trailing slash ("\") at the end of a BuildCookRun command sent to UAT results in UAT receiving a malformed command. If the command ends with a slash, the resulting command that UAT recei ...

Potential for race conditions in startup movies to cause crash

Tools - Feb 14, 2019

In startup movies there is a potential for a race condition when getting the size of an FMovieViewport. This has led to crashes for licensees. The shared pointer ...

User Defined Struct causing crash due to accessing freed memory when using Stompmalloc

Gameplay - Feb 14, 2019

A licensee has reported that Custom Structs can cause a crash when using StompMalloc under certain situations. Regression?: No This occurs in 4.20 ...

Volumetric Lightmaps do not work with Landscape texture mapping

Rendering - Feb 13, 2019

It appears that the Lightmass Volumetric Lightmap does not work with Landscape textures. When it samples the Landscape with some textured material, the resulting lighting build data does not match t ...

Datasmith re-import crash - UE4Editor-UnrealEd!UMaterialInstanceConstantFactoryNew::FactoryCreateNew

Datasmith - 3dsMax - Feb 13, 2019

From user:I'm getting repeatable crashes on re-imports after I've re-worked the models a bit in Max. The workaround now is to just delete everything from Unreal and do a fresh import, but as my o ...

Crash in Debug Camera (patch provided in comment !)

Gameplay - Feb 12, 2019

Hello, A licensee has reported us a crash in DebugCameraController / DebugCameraHUD.  It is due to a missing check in ADebugCameraHUD::PostRender() of SelectedActor set in ADebugCameraController ...