// 栈不为空时才判断（避免访问stack.at(-1)时报错）
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qemu-system-x86_64 -m 8G -cpu host -smp 4 -boot d -cdrom ./output/bootiso/install.iso -hda vm_disk.qcow2 -netdev user,id=mynet0 -device e1000,netdev=mynet0 -serial stdio -enable-kvm，推荐阅读Line官方版本下载获取更多信息
Montgomery stressed that the model is intentionally issuer‑agnostic and composable: if two developers share trust in different issuers, they can still find overlapping trust paths, and the more independent issuers exist, the stronger the overall system becomes.