[INFO] cloning repository luser/scroll-size-with
[INFO] running `"git" "clone" "--bare" "git://github.com/luser/scroll-size-with.git" "work/cache/sources/gh/luser/scroll-size-with"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/luser/scroll-size-with'...
[INFO] running `"git" "clone" "work/cache/sources/gh/luser/scroll-size-with" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/luser/scroll-size-with"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/luser/scroll-size-with'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/luser/scroll-size-with" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/luser/scroll-size-with"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/luser/scroll-size-with'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 24d74861655971eaa153cfcac430418879d0a96f
[INFO] sha for GitHub repo luser/scroll-size-with: 24d74861655971eaa153cfcac430418879d0a96f
[INFO] validating manifest of luser/scroll-size-with 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 luser/scroll-size-with 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 luser/scroll-size-with
[INFO] finished frobbing luser/scroll-size-with
[INFO] frobbed toml for luser/scroll-size-with written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/luser/scroll-size-with/Cargo.toml
[INFO] started frobbing luser/scroll-size-with
[INFO] finished frobbing luser/scroll-size-with
[INFO] frobbed toml for luser/scroll-size-with written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/luser/scroll-size-with/Cargo.toml
[INFO] crate luser/scroll-size-with 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/m4b/scroll`
[INFO] [stderr]     Updating git repository `https://github.com/luser/scroll_derive`
[INFO] [stderr] error: failed to load source for a dependency on `scroll_derive`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Unable to update https://github.com/luser/scroll_derive?branch=sizewith#5f6a770d
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   revspec '5f6a770d3b7f0e218cc25e92a397080c79cf231d' 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