panic: vwakeup: neg numoutput
Starting stack trace...
panic(ffffffff833e8157) at panic+0x1ba sys/kern/subr_prf.c:229
vwakeup(fffffd8063e385e8) at vwakeup+0x17c
biodone(fffffd806cef4c08) at biodone+0x121 sys/kern/vfs_bio.c:1290
sd_buf_done(fffffd806d107380) at sd_buf_done+0x2de sys/scsi/sd.c:772
vioscsi_vq_done(ffff8000000a2618) at vioscsi_vq_done+0xe1 sys/dev/pv/vioscsi.c:-1
intr_handler(ffff80003c945bf0,ffff80000029af80) at intr_handler+0xcb sys/arch/amd64/amd64/intr.c:-1
Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f
end of kernel
end trace frame: 0x79a31bb13f90, count: 250
End of stack trace.