[INFO] cloning repository itsmontoya/hello_world
[INFO] running `"git" "clone" "--bare" "git://github.com/itsmontoya/hello_world.git" "work/cache/sources/gh/itsmontoya/hello_world"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/itsmontoya/hello_world'...
[INFO] running `"git" "clone" "work/cache/sources/gh/itsmontoya/hello_world" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/itsmontoya/hello_world"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/itsmontoya/hello_world'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/itsmontoya/hello_world" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/itsmontoya/hello_world"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/itsmontoya/hello_world'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e3c2cd88707d734f51696ff0c8667727406a280f
[INFO] sha for GitHub repo itsmontoya/hello_world: e3c2cd88707d734f51696ff0c8667727406a280f
[INFO] validating manifest of itsmontoya/hello_world 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 itsmontoya/hello_world 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 itsmontoya/hello_world
[INFO] finished frobbing itsmontoya/hello_world
[INFO] frobbed toml for itsmontoya/hello_world written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/itsmontoya/hello_world/Cargo.toml
[INFO] started frobbing itsmontoya/hello_world
[INFO] finished frobbing itsmontoya/hello_world
[INFO] frobbed toml for itsmontoya/hello_world written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/itsmontoya/hello_world/Cargo.toml
[INFO] crate itsmontoya/hello_world 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]     Updating git repository `https://github.com/itsmontoya/hyper`
[INFO] [stderr] error: failed to load source for a dependency on `hyper`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Unable to update https://github.com/itsmontoya/hyper?branch=implement_put_method#c14f4f69
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   revspec 'c14f4f6982dfc1d8879c92a300f6f880913cc1d9' 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