[INFO] cloning repository https://github.com/einoj/ratsim
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/einoj/ratsim" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feinoj%2Fratsim", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feinoj%2Fratsim'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 92738d4f590b915f8c8ec4c8213ad4758a06e374
[INFO] checking einoj/ratsim against master#350d0ef0ec0493e6d21cfb265cb8211a0e74d766 for pr-145342
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feinoj%2Fratsim" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] [stderr] fatal: update_ref failed for ref 'HEAD': cannot update ref 'refs/heads/main': couldn't write '/workspace/builds/worker-7-tc1/source/.git/refs/heads/main.lock'


failed to checkout https://github.com/einoj/ratsim

Caused by:
    command failed: exit status: 128
    
    