[INFO] updating cached repository https://github.com/rust-lang-nursery/rustup.rs
[INFO] running `"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"`
[INFO] [stderr] From https://github.com/rust-lang-nursery/rustup.rs
[INFO] [stderr]    0fada4f..bbb4160  master        -> master
[INFO] [stderr]  * [new branch]      rust-workflow -> rust-workflow
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] bbb4160e7a90d713f2ef6ac1635774f85eb2ffc7
[ERROR] this task or one of its parent failed!
[ERROR] command `"/workspace/cargo-home/bin/cargo" "+ba14a92a10441c4b839ce71e6ef5f7a48bbff18f" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.