Comment 673 for bug 1690085

Hello Liu

You're hitting another bug: it happens on high load (which can be easily triggered by a lot of parallel compilation threads). The only solution for your kind of problem is to RMA you CPU. See: https://www.phoronix.com/scan.php?page=news_item&px=Ryzen-Segv-Response (but the problem seems not to be related to Ryzen 7 as stated at Phoronix and it's not possible to say that CPU's after a special build time would be ok). I have been affected, too (Ryzen 7) and went through RMA process. Luckily, the first RMA'd CPU was ok - there have been people who needed more than one RMA. Take a look there:
https://community.amd.com/message/2822339
If I hit the problem those days (gcc segfault), I had to rapidly reboot my machine because it mostly hang completely some time later.

This thread here covers the problem of hanging Ryzen CPU's when the machine is completely on idle over some time (it's the opposite of the problem you're facing and I saw before CPU RMA). I "fixed" the hang on idle problem by slightly overclocking the CPU (+200 MHz - ASUS X370-PRO / BIOS 4011 04/19/2018 - Bios option: Optimization for daily computing). All other suggested workarounds don't work for me. But you can't say, overclocking would fix the problem for sure (as any other suggested workaround). But you could try it.