[INFO] updating cached repository https://github.com/rust-lang-nursery/rustup.rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] [stderr] From https://github.com/rust-lang-nursery/rustup.rs
[INFO] [stderr]    6d6e1379..7050161b  master     -> master
[INFO] [stderr]    991e56e4..b01adbbc  stable     -> stable
[INFO] [stderr]  * [new tag]           1.22.0     -> 1.22.0
[INFO] [stderr]  * [new tag]           1.22.1     -> 1.22.1
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7050161b9d89afd1db7d3d374b1acc2bb368383e
[ERROR] this task or one of its parent failed!
[ERROR] command `Command { std: "/workspace/cargo-home/bin/cargo" "+6024cfef3a82f9a7688f07054f1650081bad3af5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` failed
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.