[INFO] cloning repository https://github.com/rishit-khandelwal/binomial-pi
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rishit-khandelwal/binomial-pi" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frishit-khandelwal%2Fbinomial-pi", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frishit-khandelwal%2Fbinomial-pi'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1ec8188397f2c0ba84b01a46851ca3b4c3231e16
[INFO] checking rishit-khandelwal/binomial-pi against master#5a45ab9738330fb317d49e3594c2db5248b1e971 for pr-136303
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frishit-khandelwal%2Fbinomial-pi" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] error: failed to write new configuration file /workspace/builds/worker-6-tc1/source/.git/config.lock
[INFO] [stderr] fatal: could not set 'core.repositoryformatversion' to '0'


failed to checkout https://github.com/rishit-khandelwal/binomial-pi

Caused by:
    command failed: exit status: 128