[INFO] cloning repository https://github.com/mateuskreuch/cellular-automata-density
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mateuskreuch/cellular-automata-density" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmateuskreuch%2Fcellular-automata-density", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmateuskreuch%2Fcellular-automata-density'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 69b629ebd5bd3096e60993c6cdba7bc20e16eb8f
[INFO] checking mateuskreuch/cellular-automata-density against master#4847d6a9d07d4be9ba3196f6ad444af2d7bdde72 for pr-134276
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmateuskreuch%2Fcellular-automata-density" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] [stderr] fatal: update_ref failed for ref 'HEAD': cannot update ref 'refs/heads/master': couldn't write '/workspace/builds/worker-0-tc1/source/.git/refs/heads/master.lock'


ExecutionFailed(ExitStatus(unix_wait_status(32768)))

failed to checkout https://github.com/mateuskreuch/cellular-automata-density