[INFO] cloning repository https://github.com/boafur/rust-find-mean
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/boafur/rust-find-mean" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fboafur%2Frust-find-mean", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fboafur%2Frust-find-mean'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6d0c37c3703aafd78856a2f90405c0eba6c51263
[INFO] checking boafur/rust-find-mean against master#d14d202262d13df896b0c624b0cec6e4bfde631a for pr-143028
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fboafur%2Frust-find-mean" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] error: unable to write symref for HEAD: No space left on device


failed to checkout https://github.com/boafur/rust-find-mean

Caused by:
    command failed: exit status: 1