[INFO] cloning repository https://github.com/coalpha/aoc-2016
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/coalpha/aoc-2016" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcoalpha%2Faoc-2016", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcoalpha%2Faoc-2016'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 12308aa2a621d354a993a03fa488a3fca764138e
[INFO] checking coalpha/aoc-2016 against master#be181dd75c83d72fcc95538e235768bc367b76b9 for pr-140208
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcoalpha%2Faoc-2016" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] [stderr] error: unable to write symref for HEAD: No space left on device
[INFO] [stderr] fatal: unable to update HEAD


failed to checkout https://github.com/coalpha/aoc-2016

Caused by:
    command failed: exit status: 128