Crash in K2Node_CallFunction

UK2Node_CallFunction::GeneratePinTooltipFromFunction relies a lot on loops that increment the index used to check the individual characters in the comments. The problem is that there are a few miss ...

DemoNetDriver can cause ClearVoicePackets to be called multiple times in one tick

UE - Networking - May 18, 2022

Because DemoNetDriver doesn't override PostTickFlush, it will call the base UNetDriver's PostTickFlush. When both the game NetDriver and DemoNetDriver are ticked, this results in the online interfac ...

TraceString for TChar strings has an erroneous return statement leading to unreachable code

UE - Foundation - Insights - Oct 23, 2024

In StringTrace.cpp, the TraceString(const TCHAR* InString) function has an erroneous return statement before UE_TRACE_LOG_DEFINITION within the branch checking if the string is already in the set. ...

ResavePackages commandlet breaks sublevel translation

UE - Gameplay - Feb 26, 2019

Rebuilding lighting with commandlet will move hidden sublevels Confirmed in 4.23 MAIN @ CL 5194133 ...

MS_VertexAnimationTools_MorphTargets are not deforming and reforming

UE - Graphics Features - Sep 20, 2017

The Material should be contracting and expanding if it is working correctly, but after version 4.16 it is not. Instead it is solid in appearance in the material editor viewport. Below I have linked ...

Python cannot spawn object when running in Ueditor-CMD

UE - Editor - Workflow Systems - Dec 7, 2018

It is probably link to the fact the function try to access so GUI object that are not accessible in CMD EditorLevelLibrary.spawn_actor_from_object should work in commandlet ...

Sequence onStop does not appear to fire off in a packaged project

UE - Anim - Sequencer - Nov 9, 2016

Sequence onStop does not appear to fire off in a packaged project. The functionality appears to be present in the editor, however this does not appear to be the case after packaging. ...

Crash when adding a Material Layer with a MaterialFunctionCall node to a Material Instance

UE - Graphics Features - Mar 30, 2021

Adding a Material Layer to a Material Instance that has a Material Function Call node connected to the Set Material Attributes node causes the editor to crash. I tested a Material Layer without the ...

FLightMap2D::Serialize() contains a possible index out of range error.

UE - Graphics Features - Dec 30, 2014

A user pointed out a potential to have an index out of range error in the source code. There are also a few magic numbers scattered around in this function. ...

EngineSubsystem Deinitialize is not being called

Tools - Jan 24, 2020

UEngineSubsystem::Deinitialize() is not called when closing the editor In addition, (tested only with released 4.24.1)  when recompiling a module using the "Modules" window in the editor the d ...