[INFO] cloning repository https://github.com/yuuki-fuji/rust_lifegame
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yuuki-fuji/rust_lifegame" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyuuki-fuji%2Frust_lifegame", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyuuki-fuji%2Frust_lifegame'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a0815848744cce2098863de44dc1a72c157c91b6
[INFO] checking yuuki-fuji/rust_lifegame against master#0c478fdfe138a8b09744798c85fe2be657768b00 for pr-139419
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyuuki-fuji%2Frust_lifegame" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] error: unable to write symref for HEAD: No space left on device


failed to checkout https://github.com/yuuki-fuji/rust_lifegame

Caused by:
    command failed: exit status: 1