[INFO] cloning repository https://github.com/suhailmuhammed157/rust-serde-json
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/suhailmuhammed157/rust-serde-json" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsuhailmuhammed157%2Frust-serde-json", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsuhailmuhammed157%2Frust-serde-json'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7ac1ef4c9827156c5fafbf4dfe4ca9025f9b55fd
[INFO] checking suhailmuhammed157/rust-serde-json against master#092a284ba0421695f2032c947765429fd7095796 for pr-139763
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsuhailmuhammed157%2Frust-serde-json" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] error: failed to write new configuration file /workspace/builds/worker-7-tc1/source/.git/config.lock
[INFO] [stderr] fatal: could not set 'core.filemode' to 'true'


failed to checkout https://github.com/suhailmuhammed157/rust-serde-json

Caused by:
    command failed: exit status: 128