[INFO] cloning repository https://github.com/sgtnasty/rsarcmutex
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sgtnasty/rsarcmutex" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsgtnasty%2Frsarcmutex", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsgtnasty%2Frsarcmutex'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 78516059ca0a199f68f52b3d2ba71186db3fa418
[INFO] checking sgtnasty/rsarcmutex against master#c43786c9b7b8d8dcc3f9c604e0e3074c16ed69d3 for pr-141352
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsgtnasty%2Frsarcmutex" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] [stderr] fatal: update_ref failed for ref 'HEAD': cannot update ref 'refs/heads/main': couldn't write '/workspace/builds/worker-1-tc1/source/.git/refs/heads/main.lock'


failed to checkout https://github.com/sgtnasty/rsarcmutex

Caused by:
    command failed: exit status: 128