This happens almost 100% on a MBP/MaxOS, (2.3GHz Quad-Core Processor ,8GB 2133MHz LPDDR3 memory), also happens in a lower frequency on PC/Windows, (nvidia 1080, 64 memory)
Create any material, switch the default (sphere) viewer to others, say the Cube, the engine will crash.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-67654 in the post.