[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/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/weichweich/embedded_curve"`
[INFO] [stderr] Cloning into 'work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/weichweich/embedded_curve'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/weichweich/embedded_curve" "work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/weichweich/embedded_curve"`
[INFO] [stderr] Cloning into 'work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/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 master#39401465da4ce27aeeb2c2a26133ac35c63aa515
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of weichweich/embedded_curve on toolchain try#f45cc3094ee337acd688771b9234318046b0572d
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "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/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/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/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/weichweich/embedded_curve/Cargo.toml
[INFO] crate weichweich/embedded_curve already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Updating git repository `https://github.com/astro/smoltcp.git`
[INFO] [stderr] error: failed to load source for a dependency on `smoltcp`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Unable to update https://github.com/astro/smoltcp.git?branch=dhcp#8333045c
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   revspec '8333045cbce83c122b091b62da7dc3d002a4c9b2' not found; class=Reference (4); code=NotFound (-3)
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed