[INFO] cloning repository meh/spork
[INFO] running `"git" "clone" "--bare" "git://github.com/meh/spork.git" "work/cache/sources/gh/meh/spork"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/meh/spork'...
[INFO] running `"git" "clone" "work/cache/sources/gh/meh/spork" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/meh/spork"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/meh/spork'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/meh/spork" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/meh/spork"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/meh/spork'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cd10997d7cedf0c6a7f14962fb6c87ee462abf19
[INFO] sha for GitHub repo meh/spork: cd10997d7cedf0c6a7f14962fb6c87ee462abf19
[INFO] validating manifest of meh/spork 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 meh/spork 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 meh/spork
[INFO] finished frobbing meh/spork
[INFO] frobbed toml for meh/spork written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/meh/spork/Cargo.toml
[INFO] started frobbing meh/spork
[INFO] finished frobbing meh/spork
[INFO] frobbed toml for meh/spork written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/meh/spork/Cargo.toml
[INFO] crate meh/spork 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] error: checksum for `xcb-util v0.2.0` changed between lock files
[INFO] [stderr] 
[INFO] [stderr] this could be indicative of a few possible errors:
[INFO] [stderr] 
[INFO] [stderr]     * the lock file is corrupt
[INFO] [stderr]     * a replacement source in use (e.g., a mirror) returned a different checksum
[INFO] [stderr]     * the source itself may be corrupt in one way or another
[INFO] [stderr] 
[INFO] [stderr] unable to verify that `xcb-util v0.2.0` is the same as when the lockfile was generated
[INFO] [stderr] 
[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