$ qemu-system-x86_64 -monitor stdio -hda foo.img QEMU 3.1.0 monitor - type 'help' for more information (qemu) stop (qemu) migrate "exec:cat >/dev/null" (qemu) migrate "exec:cat >/dev/null" qemu-system-x86_64: /build/qemu/qemu-3.1/block.c:4647: bdrv_inactivate_recurse: Assertion `!(bs->open_flags & BDRV_O_INACTIVE)' failed. Aborted
(it is irrelevant what's in foo.img, it only needs to be initialized). If it is worth to bisect I'll do that tomorrow. Thanks, /mjt
