Panic when run make image ARCH=riscv64

[shzhxh]

the panic is as follows:

thread 'main' panicked at 'called Result::unwrap() on an Err value: Os { code: 18, kind: CrossesDevices, message: "Invalid cross-device link" }', xtask/src/download.rs:19:30

When change fs::rename to fs::copy in the line where the error was reported, the error disappeared.
Document of Rust STD library shows that std::fs::rename will not work if the new name is on a different mount point. And I tested it locally, it does report the same error when I rename file to a different mount point.

[YdrMaster]

了解了，确实原理上 rename 不可能跨 mount。不过 CI 没问题，是因为 CI 的文件系统整个都是虚拟出来的，都和 /tmp 在一起？

[YdrMaster]

我本地 wget 下载这些东西很难成功，所以测试不够充分……

[shzhxh]

是的，猜测github CI上/tmp只是一个普通目录，没有挂载为内存文件系统。