[INFO] cloning repository https://github.com/akagiyuu/numerical-differentiation
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/akagiyuu/numerical-differentiation" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fakagiyuu%2Fnumerical-differentiation", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fakagiyuu%2Fnumerical-differentiation'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fa6bd688eafc2abf91e1990a43294cac8ffca17e
[INFO] checking akagiyuu/numerical-differentiation against master#0f353363965ebf05e0757f7679c800b39c51a07e for pr-144896
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fakagiyuu%2Fnumerical-differentiation" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] [stderr] fatal: update_ref failed for ref 'HEAD': cannot update the ref 'HEAD': unable to append to '/workspace/builds/worker-6-tc1/source/.git/logs/HEAD': No space left on device


failed to checkout https://github.com/akagiyuu/numerical-differentiation

Caused by:
    command failed: exit status: 128