After one commit 49d2e648e808, "machine: remove qemu_machine_opts global list", is introduced, QEMU doesn't keep a global list of options but set desc lately. Then we can see the following,
$ x86_64-softmmu/qemu-system-x86_64 -usb qemu-system-x86_64: util/qemu-option.c:387: qemu_opt_get_bool_helper: \ Assertion `opt->desc && opt->desc->type == QEMU_OPT_BOOL' failed. Aborted (core dumped) So inside qemu_opt_get_bool_helper, we need to call find_desc_by_name() to work parse_option_bool() out just in case of !opt->desc. Signed-off-by: Tiejun Chen <tiejun.c...@intel.com> --- util/qemu-option.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/util/qemu-option.c b/util/qemu-option.c index a708241..7cb3601 100644 --- a/util/qemu-option.c +++ b/util/qemu-option.c @@ -377,7 +377,7 @@ static bool qemu_opt_get_bool_helper(QemuOpts *opts, const char *name, } opt = qemu_opt_find(opts, name); - if (opt == NULL) { + if ((opt == NULL) || !opt->desc) { const QemuOptDesc *desc = find_desc_by_name(opts->list->desc, name); if (desc && desc->def_value_str) { parse_option_bool(name, desc->def_value_str, &ret, &error_abort); -- 1.9.1