Steps to reproduce:

1. Download the attached project and open SampleScene
2. Make sure that you Inspector window is docked to the right of the Scene view, if it isn't already
3. In the Hierarchy panel, toggle between selecting Line and Trail Renderer game objects
4. Observe the errors in the console

Notes:

- Tested in Unity 2019.1.0a10, 2019.1.0b2, 2019.2.0a3
- Only reproduced with 2019.1.0a10 and above where the Inspector was converted to UIElements
- Only reproduces with Line and Trail renderers
- Reproduces across all render pipelines
- Does not reproduce with the default editor layout
- Here's the error message:

Layout update is struggling to process current layout (consider simplifying to avoid recursive layout): VisualElement unity-panel-container3 (x:0.00, y:0.00, width:557.00, height:790.00) world rect: (x:0.00, y:0.00, width:557.00, height:790.00)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)