[INFO] updating cached repository 0x52a1/polymorphos
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/0x52a1/polymorphos
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/0x52a1/polymorphos" "work/ex/beta-1.38-1/sources/1.37.0/gh/0x52a1/polymorphos"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/0x52a1/polymorphos'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/0x52a1/polymorphos" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/0x52a1/polymorphos"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/0x52a1/polymorphos'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5100d7669fd072edc4916cc88fa84760f95e9801
[INFO] sha for GitHub repo 0x52a1/polymorphos: 5100d7669fd072edc4916cc88fa84760f95e9801
[INFO] validating manifest of 0x52a1/polymorphos 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 0x52a1/polymorphos 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 0x52a1/polymorphos
[INFO] removed path dependency cargo_5730 from 0x52a1/polymorphos
[INFO] finished frobbing 0x52a1/polymorphos
[INFO] frobbed toml for 0x52a1/polymorphos written to work/ex/beta-1.38-1/sources/1.37.0/gh/0x52a1/polymorphos/Cargo.toml
[INFO] started frobbing 0x52a1/polymorphos
[INFO] removed path dependency cargo_5730 from 0x52a1/polymorphos
[INFO] finished frobbing 0x52a1/polymorphos
[INFO] frobbed toml for 0x52a1/polymorphos written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/0x52a1/polymorphos/Cargo.toml
[INFO] crate 0x52a1/polymorphos 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 `cargo_5730` found
[INFO] [stderr] location searched: registry `https://github.com/rust-lang/crates.io-index`
[INFO] [stderr] perhaps you meant: cargo-5730
[INFO] [stderr] required by package `polymorphos v0.3.0-alpha.1 (/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/0x52a1/polymorphos)`
[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