[INFO] updating cached repository https://github.com/CodeChain-io/codechain
[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/CodeChain-io/codechain
[INFO] [stderr]    2e1331f8..31dbd9fb  master     -> master
[INFO] [stderr]    fa617d6a..65a00720  rc-2.2.x   -> rc-2.2.x
[INFO] [stderr]    dfb04f32..8200a851  tta-test   -> tta-test
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 31dbd9fbddcf534c1ee826e3c5e282ec8709c3f6
[ERROR] this task or one of its parent failed!
[ERROR] command `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.