[INFO] updating cached repository weichweich/embedded_curve
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/weichweich/embedded_curve
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/weichweich/embedded_curve" "work/ex/beta-1.37-6/sources/1.36.0/gh/weichweich/embedded_curve"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/weichweich/embedded_curve'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/weichweich/embedded_curve" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/weichweich/embedded_curve"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/weichweich/embedded_curve'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2c09cf8e5c2207037e077ccea4639fe643c8ed6a
[INFO] sha for GitHub repo weichweich/embedded_curve: 2c09cf8e5c2207037e077ccea4639fe643c8ed6a
[INFO] validating manifest of weichweich/embedded_curve on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of weichweich/embedded_curve on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing weichweich/embedded_curve
[INFO] finished frobbing weichweich/embedded_curve
[INFO] frobbed toml for weichweich/embedded_curve written to work/ex/beta-1.37-6/sources/1.36.0/gh/weichweich/embedded_curve/Cargo.toml
[INFO] started frobbing weichweich/embedded_curve
[INFO] finished frobbing weichweich/embedded_curve
[INFO] frobbed toml for weichweich/embedded_curve written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/weichweich/embedded_curve/Cargo.toml
[INFO] crate weichweich/embedded_curve already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: no matching package named `stm32f7-discovery` found
[INFO] [stderr] location searched: https://github.com/embed-rs/stm32f7-discovery.git#18c3ba0f
[INFO] [stderr] required by package `embedded_curve v0.1.0 (/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/weichweich/embedded_curve)`
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed