[INFO] cloning repository redox-os/ion
[INFO] running `"git" "clone" "--bare" "git://github.com/redox-os/ion.git" "work/cache/sources/gh/redox-os/ion"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/redox-os/ion'...
[INFO] running `"git" "clone" "work/cache/sources/gh/redox-os/ion" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/redox-os/ion"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/redox-os/ion'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/redox-os/ion" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/redox-os/ion"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/redox-os/ion'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cd40a5a5c893f0e6436c4afbcbc297d3bd14465a
[INFO] sha for GitHub repo redox-os/ion: cd40a5a5c893f0e6436c4afbcbc297d3bd14465a
[INFO] validating manifest of redox-os/ion 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 redox-os/ion 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 redox-os/ion
[INFO] removed workspace from redox-os/ion
[INFO] removed path dependency builtins-proc from redox-os/ion
[INFO] removed path dependency ion-ranges from redox-os/ion
[INFO] removed path dependency scopes from redox-os/ion
[INFO] removed path dependency types-rs from redox-os/ion
[INFO] finished frobbing redox-os/ion
[INFO] frobbed toml for redox-os/ion written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/redox-os/ion/Cargo.toml
[INFO] started frobbing redox-os/ion
[INFO] removed workspace from redox-os/ion
[INFO] removed path dependency builtins-proc from redox-os/ion
[INFO] removed path dependency ion-ranges from redox-os/ion
[INFO] removed path dependency scopes from redox-os/ion
[INFO] removed path dependency types-rs from redox-os/ion
[INFO] finished frobbing redox-os/ion
[INFO] frobbed toml for redox-os/ion written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/redox-os/ion/Cargo.toml
[INFO] crate redox-os/ion 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://gitlab.redox-os.org/redox-os/termion`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Updating git repository `https://gitlab.redox-os.org/redox-os/small`
[INFO] [stderr] error: no matching package named `builtins-proc` found
[INFO] [stderr] location searched: registry `https://github.com/rust-lang/crates.io-index`
[INFO] [stderr] required by package `ion-shell v1.0.0-alpha (/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/redox-os/ion)`
[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