Lightmass crashes when lighting is built with material that has "Cast Shadow as Masked"

Rendering - Oct 4, 2017

Lightmass is crashing when using a material that has "Cast Shadow as Masked" set to true in its properties. Found in 4.18 P3 CL#3676890 Unable to reproduce in 4.16.3 CL# 3561208 and 4.17.2 CL#365 ...

Mac - Toasts hide behind the editor when dismissing the right-click menu in the Content Browser

Platform - Mac - Oct 4, 2017

REGRESSION: Yes, this does not occur in 4.17 When the user dismisses the right-click menu in the Content Browser, any active toasts will suddenly become hidden behind the editor window. Only when ...

Crash closing Parent and Child blueprint after renaming variable

Gameplay - Blueprint - Oct 4, 2017

REGRESSION Uncertain, was not able to repro in 4.17 with these steps. But I also can't repro with another version of QAGame in Binary editor. Crash occurs when the user closes a parent and child b ...

Actor Class Reference can take invalid Value, can lead to crash

Gameplay - Blueprint - Oct 4, 2017

REGRESSION: Can be certain as this testing was blocked by UE-50703 Through a specific chain of events (see repro), it's possible to have a non-actor as the value for an Actor Class Reference, and t ...

Metal Mobile Renderer remains checked after disabling it in the Project Settings

Platform - Mobile - Oct 3, 2017

These were not options in 4.17 so not a regression. ...

Crash changing variable type from Object Reference to Actor Soft Object Reference

Gameplay - Blueprint - Oct 3, 2017

REGRESSION: No, this occurs as far back as 4.16. Crash occurs when the user changes a variable type from Object Reference to Actor Soft Object Reference. ...

Crash occurs when diffing blueprint that has had one of its variables changed to a Soft Object Reference

Gameplay - Blueprint Editor - Oct 3, 2017

A crash occurs when diffing a blueprint that contains an array that has changed from an Object Reference to a Soft Object Reference. Note: I figured that this could be related to another bug that I ...

[CrashReport] Access Violation - UModelComponent::GetPhysicsTriMeshData() [modelcomponent.cpp:673]

Physics - Oct 2, 2017

This is a trending crash coming out of the 4.18 Previews. Users have not provided any descriptions of their actions when the crash occurred. The callstack is similar to UE-49650, which was just fix ...

FastXML doesn't parse attributes with legally unescaped single and double quote characters

Tools - Oct 2, 2017

In XML, single or double quotes can be used to surround an attribute value. Furthermore, it is legal to use whichever character isn't chosen within that attribute value without escaping it. Currentl ...

Crash adding a C++ First Person feature pack to a project

Core - Oct 2, 2017

Result: Crash while compiling modules for the projectFatal error: [File:d:\Builds\Release-4.18\Engine\Source\Runtime\CoreUObject\Private\Templates\Casts.cpp] [Line: 10] Cast of nullptr to Package fa ...