Operating system: Mint
Graphics card: Nvidia GTX 1080ti
Broken: 2.80 168a6a4bfc1
Worked: 2.79 any version
Short description of error
Cannot select a light source if there are objects behind it. It seems that selection priority is higher for meshes.
You can cycle click trough objects until it hits the light or use alt+click to select, but it's very inconvenient in comparison to 2.79.
Exact steps for others to reproduce the error
Open up the file.
Try to select the light source with a single click.