[INFO] updating cached repository https://github.com/mimblewimble/grin-wallet
[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/mimblewimble/grin-wallet
[INFO] [stderr]    54af157..1dfa6e2  current/3.1.x -> current/3.1.x
[INFO] [stderr]  * [new branch]      current/4.0.x -> current/4.0.x
[INFO] [stderr]    4fe6bf1..0d51211  master        -> master
[INFO] [stderr]  * [new tag]         v3.1.2        -> v3.1.2
[INFO] [stderr]  * [new tag]         v4.0.0        -> v4.0.0
[INFO] [stderr]  * [new tag]         v4.0.0-beta.1 -> v4.0.0-beta.1
[INFO] [stderr]  * [new tag]         v4.0.0-beta.2 -> v4.0.0-beta.2
[INFO] [stderr]  * [new tag]         v4.0.0-beta.3 -> v4.0.0-beta.3
[INFO] [stderr]  * [new tag]         v4.0.0-rc.1   -> v4.0.0-rc.1
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0d512114a338461428ba14d16f701e7a4d5816bb
[ERROR] this task or one of its parent failed!
[ERROR] command `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` failed
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.