RBT_FOREACH_REVERSE_SAFE
#ifdef RBT_FOREACH_REVERSE_SAFE
RBT_FOREACH_REVERSE_SAFE(ins, tree, &root, tmp) {
RBT_FOREACH_REVERSE_SAFE(ins, tree, &root, tmp) {
RBT_FOREACH_REVERSE_SAFE(ins, tree, &root, tmp) {