[INFO] cloning repository https://github.com/eignnx/unifier_set
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/eignnx/unifier_set" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feignnx%2Funifier_set", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feignnx%2Funifier_set'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 83ae2120ad0151d1636f9f85b0b44798eac6e790
[INFO] checking eignnx/unifier_set against master#db0e836148accac8a22532e3596ac612b63c2d8e for pr-139272
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feignnx%2Funifier_set" "/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/eignnx/unifier_set

Caused by:
    command failed: exit status: 128