Unreal Engine is crashing when I'm trying to use extrude tool in a Brush Editing mode

General Issues and Bug Reporting
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1

Unreal Engine is crushing when I’m trying to use extrude tool in a Brush Editing mode. This problem is making my work basically impossible.

Version: 5.5.4
What I have tried:
*Updating video card drivers
*Checking out if this problem is replicable on others projects (it is)
*Clearing DX cash
*Crying

What crash reporter says:

Assertion failed: 0 [File:D:\build++UE5\Sync\Engine\Plugins\Editor\GeometryMode\Source\GeometryMode\Private\EditorGeometry.cpp] [Line: 400]

UnrealEditor_GeometryMode
UnrealEditor_GeometryMode
UnrealEditor_GeometryMode
UnrealEditor_GeometryMode
UnrealEditor_GeometryMode
UnrealEditor_GeometryMode
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_ApplicationCore
UnrealEditor_ApplicationCore
UnrealEditor_ApplicationCore
UnrealEditor_ApplicationCore
user32
user32
UnrealEditor_ApplicationCore
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
kernel32
ntdll

2

Hey there @jorny! I can’t seem to replicate the issue. Checking the source code for the function the error stems from hasn’t been fruitful, since it’s a utility function int32 FGeomObject::GetObjectIndex(). This is basically used to get the index of the geometry object that’s selected. The return check(0); // Should never happen is never meant to fire, it’s basically the failsafe in case there is no way to get the object’s index appropriately.

This makes it difficult to debug without attaching a debugger on your side to see what called it and what data it had when it was called. Does this occur when working with any Brushes whatsoever?

Link to the source file referenced (this link requires you to have tied your Epic account to Github to access the engine’s source code, otherwise the page will 404): https://github.com/EpicGames/UnrealEngine/blob/release/Engine/Plugins/Editor/GeometryMode/Source/GeometryMode/Private/EditorGeometry.cpp