[INFO] cloning repository https://github.com/m5d215/rust_guessing_game
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/m5d215/rust_guessing_game" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fm5d215%2Frust_guessing_game", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fm5d215%2Frust_guessing_game'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 67f7509d6d6ea4b5ea91666770eb0bb3c4210063
[INFO] checking m5d215/rust_guessing_game against master#9c67cecd12d79f1bbc00a74f70e7ef9fff086a5a for pr-138458
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fm5d215%2Frust_guessing_game" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] error: unable to write symref for HEAD: No space left on device


failed to checkout https://github.com/m5d215/rust_guessing_game

Caused by:
    command failed: exit status: 1