[INFO] cloning repository weichweich/embedded_curve
[INFO] running `"git" "clone" "--bare" "git://github.com/weichweich/embedded_curve.git" "work/cache/sources/gh/weichweich/embedded_curve"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/weichweich/embedded_curve'...
[INFO] running `"git" "clone" "work/cache/sources/gh/weichweich/embedded_curve" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/weichweich/embedded_curve"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/weichweich/embedded_curve'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/weichweich/embedded_curve" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/weichweich/embedded_curve"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/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#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of weichweich/embedded_curve on toolchain try#8f81d0bf6baf07b92f1246696722485c4ca0b049
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-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-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/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-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/weichweich/embedded_curve/Cargo.toml
[INFO] crate weichweich/embedded_curve already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/rust-embedded/cortex-m-rt.git`
[INFO] [stderr]     Updating git repository `https://github.com/embed-rs/stm32f7-discovery.git`
[INFO] [stderr]     Updating git repository `https://github.com/rust-lang-nursery/futures-rs.git`
[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/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed