[INFO] updating cached repository sandszhouSZ/pingcap-tikv
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/sandszhouSZ/pingcap-tikv
[INFO] [stderr]  * branch              HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/sandszhouSZ/pingcap-tikv" "work/ex/pr-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/gh/sandszhouSZ/pingcap-tikv"`
[INFO] [stderr] Cloning into 'work/ex/pr-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/gh/sandszhouSZ/pingcap-tikv'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/sandszhouSZ/pingcap-tikv" "work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/gh/sandszhouSZ/pingcap-tikv"`
[INFO] [stderr] Cloning into 'work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/gh/sandszhouSZ/pingcap-tikv'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 825aca784e6f933a94b5ca5730e0049ad397b6a4
[INFO] sha for GitHub repo sandszhouSZ/pingcap-tikv: 825aca784e6f933a94b5ca5730e0049ad397b6a4
[INFO] validating manifest of sandszhouSZ/pingcap-tikv on toolchain master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78ca1bda3522b14bc0336bc01dd1d49fdba2cda7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of sandszhouSZ/pingcap-tikv on toolchain try#18481b65f318e0b4b20c0fc61340054701719d6c
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+18481b65f318e0b4b20c0fc61340054701719d6c-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing sandszhouSZ/pingcap-tikv
[INFO] removed workspace from sandszhouSZ/pingcap-tikv
[INFO] finished frobbing sandszhouSZ/pingcap-tikv
[INFO] frobbed toml for sandszhouSZ/pingcap-tikv written to work/ex/pr-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/gh/sandszhouSZ/pingcap-tikv/Cargo.toml
[INFO] started frobbing sandszhouSZ/pingcap-tikv
[INFO] removed workspace from sandszhouSZ/pingcap-tikv
[INFO] finished frobbing sandszhouSZ/pingcap-tikv
[INFO] frobbed toml for sandszhouSZ/pingcap-tikv written to work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/gh/sandszhouSZ/pingcap-tikv/Cargo.toml
[INFO] crate sandszhouSZ/pingcap-tikv already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78ca1bda3522b14bc0336bc01dd1d49fdba2cda7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/pr-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/gh/sandszhouSZ/pingcap-tikv/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78ca1bda3522b14bc0336bc01dd1d49fdba2cda7-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Updating git repository `https://github.com/busyjay/jemallocator.git`
[INFO] [stderr]     Updating git repository `https://github.com/pingcap/kvproto.git`
[INFO] [stderr]     Updating git repository `https://github.com/pingcap/murmur3.git`
[INFO] [stderr]     Updating git repository `https://github.com/pingcap/rust-rocksdb.git`
[INFO] [stderr]     Updating git repository `https://github.com/pingcap/tipb.git`
[INFO] [stderr]     Updating git repository `https://github.com/danburkert/prost`
[INFO] [stderr]     Updating git repository `https://github.com/pingcap/raft-rs`
[INFO] [stderr]     Updating git repository `https://github.com/alexcrichton/bzip2-rs.git`
[INFO] [stderr]     Updating git repository `https://github.com/busyjay/lz4-rs.git`
[INFO] [stderr]     Updating git repository `https://github.com/busyjay/rust-snappy.git`
[INFO] [stderr]     Updating git repository `https://github.com/gyscos/zstd-rs.git`
[INFO] [stderr] error: failed to select a version for `protobuf`.
[INFO] [stderr]     ... required by package `tikv v2.1.0-beta (/mnt/big/crater/work/ex/pr-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/gh/sandszhouSZ/pingcap-tikv)`
[INFO] [stderr] versions that meet the requirements `~2.0` are: 2.0.6, 2.0.5, 2.0.4, 2.0.3, 2.0.2, 2.0.1, 2.0.0
[INFO] [stderr] 
[INFO] [stderr] all possible versions conflict with previously selected packages.
[INFO] [stderr] 
[INFO] [stderr]   previously selected package `protobuf v2.1.0`
[INFO] [stderr]     ... which is depended on by `protobuf-codegen v2.1.0`
[INFO] [stderr]     ... which is depended on by `protoc-grpcio v1.0.2`
[INFO] [stderr]     ... which is depended on by `protobuf-build v0.6.3`
[INFO] [stderr]     ... which is depended on by `kvproto v0.0.2 (https://github.com/pingcap/kvproto.git#e6a1580c)`
[INFO] [stderr]     ... which is depended on by `tikv v2.1.0-beta (/mnt/big/crater/work/ex/pr-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/gh/sandszhouSZ/pingcap-tikv)`
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `protobuf` which could resolve this conflict
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78ca1bda3522b14bc0336bc01dd1d49fdba2cda7-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` failed