[INFO] updating cached repository blopker/rustr
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/blopker/rustr
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/blopker/rustr" "work/ex/beta-1.38-1/sources/1.37.0/gh/blopker/rustr"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/blopker/rustr'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/blopker/rustr" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/blopker/rustr"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/blopker/rustr'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9fd3a9c42f88196b951fb818a58c0fe3337b0b46
[INFO] sha for GitHub repo blopker/rustr: 9fd3a9c42f88196b951fb818a58c0fe3337b0b46
[INFO] validating manifest of blopker/rustr 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 blopker/rustr 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 blopker/rustr
[INFO] removed path dependency communicator from blopker/rustr
[INFO] finished frobbing blopker/rustr
[INFO] frobbed toml for blopker/rustr written to work/ex/beta-1.38-1/sources/1.37.0/gh/blopker/rustr/Cargo.toml
[INFO] started frobbing blopker/rustr
[INFO] removed path dependency communicator from blopker/rustr
[INFO] finished frobbing blopker/rustr
[INFO] frobbed toml for blopker/rustr written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/blopker/rustr/Cargo.toml
[INFO] crate blopker/rustr 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: no matching package named `communicator` found
[INFO] [stderr] location searched: registry `https://github.com/rust-lang/crates.io-index`
[INFO] [stderr] required by package `rustr v0.1.0 (/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/blopker/rustr)`
[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