[INFO] cloning repository https://github.com/zzzzzhang989/Operating-system-experiment
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zzzzzhang989/Operating-system-experiment" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzzzzzhang989%2FOperating-system-experiment", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzzzzzhang989%2FOperating-system-experiment'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ba4cd7db537e58c39e64ce18fc56981396e8a3bf
[ERROR] this task or one of its parent failed!
[ERROR] overridden task result to broken:cargo-toml
[ERROR] caused by: missing Cargo.toml
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.