iOS/tvOS fails to build from source editor built with Xcode 9.3, macro expansion producing 'defined' has undefined behavior

Platform - Mobile - Apr 2, 2018

Trying to launch on or package for TVOS or iOS from a source build of Mac or Windows will fail with errors:[2018.04.02-16.35.08:522][634]LogPlayLevel: In file included from /Volumes/Storage/GitHub ...

Landscape leaking when using ParallelInitView 1

Tools - Landscape - Mar 27, 2018

see step ...

[CrashReport] UE4Editor_Landscape!FLandscapeComponentSceneProxy::CalculateLODFromScreenSize() [landscaperender.cpp:1522]

Tools - Landscape - Mar 27, 2018

No user comments in crash group 1511 if (PreferedLOD >= 0.0f) 1512 { 1513 PreferedLOD = FMath::Clamp<int32>(PreferedLOD, FMath::Max((float)FirstLOD, MinValidLOD), FMath::Mi ...

[CrashReport] UE4Editor_ImageCore!CopyImage() [imagecore.cpp:144]

Rendering - Mar 27, 2018

No user comments on crash group  135 case ERawImageFormat::BGRA8: 136 { 137 const FColor* SrcColors = SrcImage.AsBGRA8(); 138 for (int32 TexelIndex = 0 ...

When OpenGL ES 3.1 is enabled for Android build in Handheld AR Template, camera inverts colors

XR - Mar 26, 2018

When OpenGL ES 3.1 is enabled in Android Build settings, device prompts user to choose to "Allow ARInvertColor to take pictures and record video". If allowed, colors are inverted by the camera. If ...

Audio Attenuation falloff is applied even when turned off

Audio - Mar 26, 2018

Enable Sound Attenuation in the Sound Attenuation class does not appear to work. Specifically, unchecking the box doesn't turn it off. This is new - the setting worked in 4.18.3. ...

Editor crash when Use Dynamic Material Instance is set to "True" on landscape

Tools - Landscape - Mar 23, 2018

Setting "Use Dynamic Material Instance" to true in the landscape details will cause the editor to crash. Reproduced in 4.19.0 CL 3944462 and 4.20 Main. This feature is not available in 4.18.3. ...

Crash force deleting blueprint being used as a Child Actor Component in an actor in the level

Gameplay - Components - Mar 23, 2018

REGRESSION: Yes, the crash does not occur in 4.18. A crash occurs when the user force deletes an actor blueprint that is being used as a child actor component in another blueprint that's in the lev ...

Crash on PIE exit after dynamically enabling and disabling tick functions through the Level Script blueprint.

Gameplay - Mar 23, 2018

User reports hitting an assertion due to invalid FTickTaskManager state when game is attempting to unregister a tick function that was previously disabled dynamically. Failed assertion is in FTickT ...

Setting the name of a State or Conduit node to an extremely long string causes a crash

Anim - Mar 22, 2018

Setting the name of a State or Conduit node to an extremely long string causes a crash This issue is not a regression. ...