[INFO] updating cached repository https://github.com/paritytech/parity-ethereum
[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/paritytech/parity-ethereum
[INFO] [stderr]  - [deleted]             (none)     -> beta
[INFO] [stderr]  - [deleted]             (none)     -> beta-update-version-string
[INFO] [stderr]  - [deleted]             (none)     -> fix-beta-changelog
[INFO] [stderr]  - [deleted]             (none)     -> fix-stable-changelog
[INFO] [stderr]  - [deleted]             (none)     -> parity-clib-rust2018
[INFO] [stderr]  - [deleted]             (none)     -> stable-track
[INFO] [stderr]    79b921a3f..c3a4fa7d7  dp/chore/use-latest-attempt-to-switch-to-upstream -> dp/chore/use-latest-attempt-to-switch-to-upstream
[INFO] [stderr]    33bfcec4a..bf44f024c  master          -> master
[INFO] [stderr]  * [new branch]          old-beta-v2.6   -> old-beta-v2.6
[INFO] [stderr]  * [new branch]          old-stable-v2.5 -> old-stable-v2.5
[INFO] [stderr]  * [new branch]          old-stable-v2.7 -> old-stable-v2.7
[INFO] [stderr]  + 253ff3f37...aa0a703e7 stable          -> stable  (forced update)
[INFO] [stderr]    1b3787040..748eda2aa  v2.7.0-stable   -> v2.7.0-stable
[INFO] [stderr]  * [new tag]             v2.7.0          -> v2.7.0
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] bf44f024c6286a2f95b774997d6b65c34aabcaf2
[ERROR] this task or one of its parent failed!
[ERROR] command `"/workspace/cargo-home/bin/cargo" "+a243773eaf3fedcd203f10ae4579e4f106bf7ccd" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.