[INFO] cloning repository silica-rs/silica-demo
[INFO] running `"git" "clone" "--bare" "git://github.com/silica-rs/silica-demo.git" "work/cache/sources/gh/silica-rs/silica-demo"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/silica-rs/silica-demo'...
[INFO] running `"git" "clone" "work/cache/sources/gh/silica-rs/silica-demo" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/silica-rs/silica-demo"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/silica-rs/silica-demo'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/silica-rs/silica-demo" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/silica-rs/silica-demo"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/silica-rs/silica-demo'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] bf9b3e6dd03fce7f860f97281a53d0e9d7578fda
[INFO] sha for GitHub repo silica-rs/silica-demo: bf9b3e6dd03fce7f860f97281a53d0e9d7578fda
[INFO] validating manifest of silica-rs/silica-demo 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 silica-rs/silica-demo 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 silica-rs/silica-demo
[INFO] removed path dependency silica from silica-rs/silica-demo
[INFO] removed path dependency silica-arduino-mega2560 from silica-rs/silica-demo
[INFO] removed path dependency silica-arduino-uno from silica-rs/silica-demo
[INFO] removed path dependency silica-olimex-p207 from silica-rs/silica-demo
[INFO] finished frobbing silica-rs/silica-demo
[INFO] frobbed toml for silica-rs/silica-demo written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/silica-rs/silica-demo/Cargo.toml
[INFO] started frobbing silica-rs/silica-demo
[INFO] removed path dependency silica from silica-rs/silica-demo
[INFO] removed path dependency silica-arduino-mega2560 from silica-rs/silica-demo
[INFO] removed path dependency silica-arduino-uno from silica-rs/silica-demo
[INFO] removed path dependency silica-olimex-p207 from silica-rs/silica-demo
[INFO] finished frobbing silica-rs/silica-demo
[INFO] frobbed toml for silica-rs/silica-demo written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/silica-rs/silica-demo/Cargo.toml
[INFO] crate silica-rs/silica-demo 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 crates.io index
[INFO] [stderr] error: no matching package named `silica-arduino-mega2560` found
[INFO] [stderr] location searched: registry `https://github.com/rust-lang/crates.io-index`
[INFO] [stderr] required by package `silica-demo v0.0.1 (/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/silica-rs/silica-demo)`
[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