Actually it wasn't avx512, that was the first one I tried :) It's enabled also on 3.7 and that version works fine. Only one that was added in 3.8 is PKU, but dropping just that didn't help.
I did try dropping all non-client features (AVX512, CDI, DQI, BWI, VLX, PKU) and that worked. Maybe one of CDI/DQI/BWI/VLX is somewhat broken on 3.8?
Actually it wasn't avx512, that was the first one I tried :) It's enabled also on 3.7 and that version works fine. Only one that was added in 3.8 is PKU, but dropping just that didn't help.
I did try dropping all non-client features (AVX512, CDI, DQI, BWI, VLX, PKU) and that worked. Maybe one of CDI/DQI/BWI/VLX is somewhat broken on 3.8?