Phoronix published an update on the AMD Ryzen CPU compiler segmentation fault issue on Linux.

AMD has confirmed this issue doesn't affect EPYC or Threadripper processors, which we'll be testing soon, and for those Linux users affected by the problem they have been handling an RMA process via AMD Customer Care.

AMD has not provided an official public explanation of the fundamental problem, but from those in our forums and elsewhere, it appears to affect Ryzen CPUs manufactured prior to week 25. This Ryzen 7 1800X was from "week 30" where as my original Ryzen 7 1800X review sample was from "week 5" as well as the Ryzen 7 1700. The Ryzen 5 1400 that I bought via retail channels in June was manufactured in week 14. The Ryzen 3 1300X review sample was from week 20 and the Ryzen 3 1200 from week 25. Week 25 is the middle of June.

  Update on Ryzen CPU Issue on Linux