[INFO] cloning repository https://github.com/hota1024/piston-reversi
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hota1024/piston-reversi" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhota1024%2Fpiston-reversi", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhota1024%2Fpiston-reversi'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 81b6a0ad3bfad3ea14df17457e60192a802b8143
[INFO] checking hota1024/piston-reversi against master#b2728d5426bab1d8c39709768c7e22b7f66dde5d for pr-135852
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhota1024%2Fpiston-reversi" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] error: failed to write new configuration file /workspace/builds/worker-2-tc1/source/.git/config.lock
[INFO] [stderr] fatal: could not set 'core.bare' to 'false'


failed to checkout https://github.com/hota1024/piston-reversi

Caused by:
    command failed: exit status: 128