System Information
Operating system: Windows 10
Graphics card: Intel® HD Graphics 620 (Kaby Lake GT2)
Processor: Intel® Core™ i3-7020U CPU @ 2.30GHz × 4 (64-bit)
Memory: 8 GB

Blender Version
Blender 2.80 RC2

Short description of error
I was editing a texture in the image editor whilst in the texture paint workspace. I changed my brush size to something around 32px then pressed the right bracket to increase brush size and Blender 2.80 RC2 crashed instantly.

Exact steps for others to reproduce the error

1. Open texture paint workspace
2. In image editor paint mode, create 1K texture.
3. Use the slider at the top to decrease brush size to something around 30px-40px
4. In the image editor, hover over image or outside of image and press right bracket