[INFO] cloning repository redox-os/netstack
[INFO] running `"git" "clone" "--bare" "git://github.com/redox-os/netstack.git" "work/cache/sources/gh/redox-os/netstack"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/redox-os/netstack'...
[INFO] running `"git" "clone" "work/cache/sources/gh/redox-os/netstack" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/redox-os/netstack"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/redox-os/netstack'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/redox-os/netstack" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/redox-os/netstack"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/redox-os/netstack'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2079856d97ae218d01f32be4b881360765b2b51d
[INFO] sha for GitHub repo redox-os/netstack: 2079856d97ae218d01f32be4b881360765b2b51d
[INFO] validating manifest of redox-os/netstack 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/netstack 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/netstack
[INFO] removed path dependency smoltcp from redox-os/netstack
[INFO] finished frobbing redox-os/netstack
[INFO] frobbed toml for redox-os/netstack written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/redox-os/netstack/Cargo.toml
[INFO] started frobbing redox-os/netstack
[INFO] removed path dependency smoltcp from redox-os/netstack
[INFO] finished frobbing redox-os/netstack
[INFO] frobbed toml for redox-os/netstack written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/redox-os/netstack/Cargo.toml
[INFO] crate redox-os/netstack 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 crates.io index
[INFO] [stderr]     Updating git repository `https://gitlab.redox-os.org/redox-os/netutils.git`
[INFO] [stderr]     Updating git repository `https://gitlab.redox-os.org/redox-os/mio-uds`
[INFO] [stderr] error: failed to load source for a dependency on `mio-uds`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Unable to update https://gitlab.redox-os.org/redox-os/mio-uds#2936ef82
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   revspec '2936ef82070ea0c4aa8a7360455b8c512d8c88c0' 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