[INFO] cloning repository https://github.com/caspark/2015-08-rust-half-a-game-piston-talk
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/caspark/2015-08-rust-half-a-game-piston-talk" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaspark%2F2015-08-rust-half-a-game-piston-talk", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaspark%2F2015-08-rust-half-a-game-piston-talk'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 57348d6698647f461f5e307fbcacd4a36a542839
[ERROR] this task or one of its parent failed!
[ERROR] command failed: exit status: 101
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.