[INFO] updating cached repository czipperz/rust-comp
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/czipperz/rust-comp
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/czipperz/rust-comp" "work/ex/beta-1.38-1/sources/1.37.0/gh/czipperz/rust-comp"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/czipperz/rust-comp'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/czipperz/rust-comp" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/czipperz/rust-comp"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/czipperz/rust-comp'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0919c4aa01c30b79f12271979631a6d2e9f58966
[INFO] sha for GitHub repo czipperz/rust-comp: 0919c4aa01c30b79f12271979631a6d2e9f58966
[INFO] validating manifest of czipperz/rust-comp 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 czipperz/rust-comp 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 czipperz/rust-comp
[INFO] removed workspace from czipperz/rust-comp
[INFO] removed path dependency rust-comp-opt from czipperz/rust-comp
[INFO] removed path dependency rust-comp-run from czipperz/rust-comp
[INFO] finished frobbing czipperz/rust-comp
[INFO] frobbed toml for czipperz/rust-comp written to work/ex/beta-1.38-1/sources/1.37.0/gh/czipperz/rust-comp/Cargo.toml
[INFO] started frobbing czipperz/rust-comp
[INFO] removed workspace from czipperz/rust-comp
[INFO] removed path dependency rust-comp-opt from czipperz/rust-comp
[INFO] removed path dependency rust-comp-run from czipperz/rust-comp
[INFO] finished frobbing czipperz/rust-comp
[INFO] frobbed toml for czipperz/rust-comp written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/czipperz/rust-comp/Cargo.toml
[INFO] crate czipperz/rust-comp 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]     Updating crates.io index
[INFO] [stderr] error: no matching package named `rust-comp-opt` found
[INFO] [stderr] location searched: registry `https://github.com/rust-lang/crates.io-index`
[INFO] [stderr] required by package `rust-comp v0.1.0 (/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/czipperz/rust-comp)`
[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