[INFO] cloning repository https://github.com/vitalrev/zmq-rust-hello-world-client
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vitalrev/zmq-rust-hello-world-client" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvitalrev%2Fzmq-rust-hello-world-client", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvitalrev%2Fzmq-rust-hello-world-client'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1f2175165e6772831b2e689ee7390c4c2ac53495
[INFO] testing vitalrev/zmq-rust-hello-world-client against master#ebf0cf75d368c035f4c7e7246d203bd469ee4a51 for pr-137940
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvitalrev%2Fzmq-rust-hello-world-client" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] error: failed to write new configuration file /workspace/builds/worker-0-tc1/source/.git/config.lock
[INFO] [stderr] fatal: could not set 'core.repositoryformatversion' to '0'


failed to checkout https://github.com/vitalrev/zmq-rust-hello-world-client

Caused by:
    command failed: exit status: 128