Comment # 22 on bug 1012142 from Andrei Borzenkov

(In reply to Zhao Qiang ������ from comment #9)
> This problem is happened in a real machine or a virtual machine ?

I have it VM:

qemu-system-x86_64 -m 768 -device virtio-scsi-pci -drive
file=$HOME/vm/leap/hd0.qcow2,if=none,id=hd0,discard=on,format=qcow2 -device
scsi-hd,drive=hd0 -net user -net nic,model=virtio -enable-kvm -virtfs
local,path=$HOME,security_model=none,mount_tag=home -drive
file=$HOME/vm/leap/hd1.qcow2,if=none,id=hd1,discard=on,format=qcow2 -device
scsi-hd,drive=hd1

100% reproducible. The first core preserved here is from 2016-11-19.