[INFO] updating cached repository polyfloyd/ledcat
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/polyfloyd/ledcat
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/polyfloyd/ledcat" "work/ex/beta-1.38-1/sources/1.37.0/gh/polyfloyd/ledcat"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/polyfloyd/ledcat'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/polyfloyd/ledcat" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/polyfloyd/ledcat"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/polyfloyd/ledcat'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 46fc2e69a976d7956547dd351b186a6ed44def9e
[INFO] sha for GitHub repo polyfloyd/ledcat: 46fc2e69a976d7956547dd351b186a6ed44def9e
[INFO] validating manifest of polyfloyd/ledcat 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 polyfloyd/ledcat 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 polyfloyd/ledcat
[INFO] removed workspace from polyfloyd/ledcat
[INFO] removed path dependency gpio from polyfloyd/ledcat
[INFO] removed path dependency librgbmatrix-sys from polyfloyd/ledcat
[INFO] finished frobbing polyfloyd/ledcat
[INFO] frobbed toml for polyfloyd/ledcat written to work/ex/beta-1.38-1/sources/1.37.0/gh/polyfloyd/ledcat/Cargo.toml
[INFO] started frobbing polyfloyd/ledcat
[INFO] removed workspace from polyfloyd/ledcat
[INFO] removed path dependency gpio from polyfloyd/ledcat
[INFO] removed path dependency librgbmatrix-sys from polyfloyd/ledcat
[INFO] finished frobbing polyfloyd/ledcat
[INFO] frobbed toml for polyfloyd/ledcat written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/polyfloyd/ledcat/Cargo.toml
[INFO] crate polyfloyd/ledcat 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 `librgbmatrix-sys` found
[INFO] [stderr] location searched: registry `https://github.com/rust-lang/crates.io-index`
[INFO] [stderr] required by package `ledcat v0.1.5 (/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/polyfloyd/ledcat)`
[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