[INFO] updating cached repository manuel-woelker/tantivy-server
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/manuel-woelker/tantivy-server
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/manuel-woelker/tantivy-server" "work/ex/beta-1.38-1/sources/1.37.0/gh/manuel-woelker/tantivy-server"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/manuel-woelker/tantivy-server'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/manuel-woelker/tantivy-server" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/manuel-woelker/tantivy-server"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/manuel-woelker/tantivy-server'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 369451ed45fd5636e92f4d2c695d1f7693bb9513
[INFO] sha for GitHub repo manuel-woelker/tantivy-server: 369451ed45fd5636e92f4d2c695d1f7693bb9513
[INFO] validating manifest of manuel-woelker/tantivy-server on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of manuel-woelker/tantivy-server on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing manuel-woelker/tantivy-server
[INFO] finished frobbing manuel-woelker/tantivy-server
[INFO] frobbed toml for manuel-woelker/tantivy-server written to work/ex/beta-1.38-1/sources/1.37.0/gh/manuel-woelker/tantivy-server/Cargo.toml
[INFO] started frobbing manuel-woelker/tantivy-server
[INFO] finished frobbing manuel-woelker/tantivy-server
[INFO] frobbed toml for manuel-woelker/tantivy-server written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/manuel-woelker/tantivy-server/Cargo.toml
[INFO] crate manuel-woelker/tantivy-server already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: checksum for `lz4-sys v1.0.1+1.7.3` changed between lock files
[INFO] [stderr] 
[INFO] [stderr] this could be indicative of a few possible errors:
[INFO] [stderr] 
[INFO] [stderr]     * the lock file is corrupt
[INFO] [stderr]     * a replacement source in use (e.g., a mirror) returned a different checksum
[INFO] [stderr]     * the source itself may be corrupt in one way or another
[INFO] [stderr] 
[INFO] [stderr] unable to verify that `lz4-sys v1.0.1+1.7.3` is the same as when the lockfile was generated
[INFO] [stderr] 
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed