[INFO] cloning repository https://github.com/github0112/cs220
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/github0112/cs220" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgithub0112%2Fcs220", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgithub0112%2Fcs220'...
[INFO] [stderr] error: unable to write symref for HEAD: No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 1)
[INFO] cloning repository https://github.com/github0112/cs220
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/github0112/cs220" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgithub0112%2Fcs220", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgithub0112%2Fcs220'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 02b72ecf783c96b4887f4408636f352c922eb5e7
[INFO] checking github0112/cs220 against master#d8810e3e2dab96778d20dd6d746ff95465515509 for pr-137045
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgithub0112%2Fcs220" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] [stderr] error: unable to write file src/assignments/assignment06/symbolic_differentiation.rs
[INFO] [stderr] error: unable to write file src/assignments/assignment06/symbolic_differentiation_grade.rs
[INFO] [stderr] fatal: cannot create directory at 'src/assignments/assignment07': No space left on device
[INFO] [stderr] warning: Clone succeeded, but checkout failed.
[INFO] [stderr] You can inspect what was checked out with 'git status'
[INFO] [stderr] and retry with 'git restore --source=HEAD :/'
[INFO] [stderr] 


failed to checkout https://github.com/github0112/cs220

Caused by:
    command failed: exit status: 128