[INFO] cloning repository https://github.com/swu-hyk/exam-grading
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/swu-hyk/exam-grading" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fswu-hyk%2Fexam-grading", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fswu-hyk%2Fexam-grading'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e4e031f00888618709b7a6bf7d15026142ceddfa
[INFO] checking swu-hyk/exam-grading against master#a932eb36f8adf6c8cdfc450f063943da3112d621 for pr-140209-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fswu-hyk%2Fexam-grading" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] /workspace/builds/worker-3-tc1/source/.git/branches/: No space left on device


failed to checkout https://github.com/swu-hyk/exam-grading

Caused by:
    command failed: exit status: 1