Aug 18 00:38:15 dom0 kernel: traps: qemu-system-i38[794] trap invalid opcode ip:55b63bce67ba sp:7fff89179280 error:0 in qemu-system-i386[55b63b734000+5fa000]
Aug 18 00:38:15 dom0 systemd[1]: Created slice Slice /system/systemd-coredump.
Aug 18 00:38:15 dom0 kernel: intel_powerclamp: No package C-state available
Aug 18 00:38:15 dom0 systemd[1]: Started Process Core Dump (PID 810/UID 0).
Aug 18 00:38:15 dom0 kernel: iTCO_wdt iTCO_wdt: Found a Intel PCH TCO device (Version=6, TCOBASE=0x0400)
Aug 18 00:38:15 dom0 kernel: iTCO_wdt iTCO_wdt: initialized. heartbeat=30 sec (nowayout=0)
Aug 18 00:38:15 dom0 systemd[1]: Finished Virtual Console Setup.
Aug 18 00:38:15 dom0 kernel: intel_powerclamp: No package C-state available
Aug 18 00:38:15 dom0 kernel: xen: registering gsi 51 triggering 0 polarity 1
Aug 18 00:38:15 dom0 kernel: xen: --> pirq=51 -> irq=51 (gsi=51)
Aug 18 00:38:15 dom0 systemd-coredump[812]: Process 794 (qemu-system-i38) of user 0 dumped core.

                                            Stack trace of thread 794:
                                            #0  0x000055b63bce67ba n/a (qemu-system-i386 + 0x8b97ba)
                                            #1  0x00007f2efbc27dfe __libc_start_main (libc.so.6 + 0x27dfe)
                                            #2  0x000055b63b743995 n/a (qemu-system-i386 + 0x316995)
                                            ELF object binary architecture: AMD x86-64
Aug 18 00:38:15 dom0 systemd[1]: systemd-coredump@0-810-0.service: Deactivated successfully.
Aug 18 00:38:15 dom0 systemd[1]: xen-qemu-dom0-disk-backend.service: Main process exited, code=dumped, status=4/ILL
Aug 18 00:38:15 dom0 systemd[1]: xen-qemu-dom0-disk-backend.service: Failed with result 'core-dump'.