[INFO] updating cached repository https://github.com/tikv/tikv
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/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)     -> zhouqiang-cl-patch-1
[INFO] [stderr]    a036e281..88bafb81  master      -> master
[INFO] [stderr]    554cb7cc..d4b126a5  release-3.0 -> release-3.0
[INFO] [stderr]    b8048f45..f74b20bd  release-3.1 -> release-3.1
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 88bafb8109e1915a4676f09b3d4c2b3d6fe95d8a
[ERROR] this task or one of its parent failed!
[ERROR] command `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.