[INFO] updating cached repository https://github.com/tikv/tikv
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] [stderr] From https://github.com/tikv/tikv
[INFO] [stderr]  - [deleted]           (none)     -> _release-3.0-raft-per-write
[INFO] [stderr]    72a08b74..b2b05cea  backup2     -> backup2
[INFO] [stderr]    b4daac2b..db2fb8ec  master      -> master
[INFO] [stderr]    c4aaa3e2..295eb338  release-2.1 -> release-2.1
[INFO] [stderr]    304cc7da..a31fea7c  release-3.0 -> release-3.0
[INFO] [stderr]  * [new branch]        release-3.1 -> release-3.1
[INFO] [stderr]  * [new tag]           v2.1.17     -> v2.1.17
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] db2fb8ece6677e85b164568149d089fc4057672e
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed