[INFO] updating cached repository kylewlacy/rust-conflicting-impl-specialization
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/kylewlacy/rust-conflicting-impl-specialization
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/kylewlacy/rust-conflicting-impl-specialization" "work/ex/beta-1.38-1/sources/1.37.0/gh/kylewlacy/rust-conflicting-impl-specialization"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/kylewlacy/rust-conflicting-impl-specialization'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/kylewlacy/rust-conflicting-impl-specialization" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kylewlacy/rust-conflicting-impl-specialization"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kylewlacy/rust-conflicting-impl-specialization'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e31c1e5305bc801850b7266e8817cda75342a948
[INFO] sha for GitHub repo kylewlacy/rust-conflicting-impl-specialization: e31c1e5305bc801850b7266e8817cda75342a948
[INFO] validating manifest of kylewlacy/rust-conflicting-impl-specialization 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 kylewlacy/rust-conflicting-impl-specialization 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 kylewlacy/rust-conflicting-impl-specialization
[INFO] removed path dependency child from kylewlacy/rust-conflicting-impl-specialization
[INFO] finished frobbing kylewlacy/rust-conflicting-impl-specialization
[INFO] frobbed toml for kylewlacy/rust-conflicting-impl-specialization written to work/ex/beta-1.38-1/sources/1.37.0/gh/kylewlacy/rust-conflicting-impl-specialization/Cargo.toml
[INFO] started frobbing kylewlacy/rust-conflicting-impl-specialization
[INFO] removed path dependency child from kylewlacy/rust-conflicting-impl-specialization
[INFO] finished frobbing kylewlacy/rust-conflicting-impl-specialization
[INFO] frobbed toml for kylewlacy/rust-conflicting-impl-specialization written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kylewlacy/rust-conflicting-impl-specialization/Cargo.toml
[INFO] crate kylewlacy/rust-conflicting-impl-specialization 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 `child` found
[INFO] [stderr] location searched: registry `https://github.com/rust-lang/crates.io-index`
[INFO] [stderr] required by package `conflicting-assoc v0.1.0 (/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/kylewlacy/rust-conflicting-impl-specialization)`
[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