[INFO] cloning repository birktj/image-streaming-iterator-bench
[INFO] running `"git" "clone" "--bare" "git://github.com/birktj/image-streaming-iterator-bench.git" "work/cache/sources/gh/birktj/image-streaming-iterator-bench"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/birktj/image-streaming-iterator-bench'...
[INFO] running `"git" "clone" "work/cache/sources/gh/birktj/image-streaming-iterator-bench" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/birktj/image-streaming-iterator-bench"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/birktj/image-streaming-iterator-bench'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/birktj/image-streaming-iterator-bench" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/birktj/image-streaming-iterator-bench"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/birktj/image-streaming-iterator-bench'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b93ae97043a320257692ccb3e1450196a0f518b1
[INFO] sha for GitHub repo birktj/image-streaming-iterator-bench: b93ae97043a320257692ccb3e1450196a0f518b1
[INFO] validating manifest of birktj/image-streaming-iterator-bench 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 birktj/image-streaming-iterator-bench 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 birktj/image-streaming-iterator-bench
[INFO] finished frobbing birktj/image-streaming-iterator-bench
[INFO] frobbed toml for birktj/image-streaming-iterator-bench written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/birktj/image-streaming-iterator-bench/Cargo.toml
[INFO] started frobbing birktj/image-streaming-iterator-bench
[INFO] finished frobbing birktj/image-streaming-iterator-bench
[INFO] frobbed toml for birktj/image-streaming-iterator-bench written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/birktj/image-streaming-iterator-bench/Cargo.toml
[INFO] crate birktj/image-streaming-iterator-bench 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 git repository `https://github.com/birktj/image`
[INFO] [stderr] error: failed to load source for a dependency on `image`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Unable to update https://github.com/birktj/image?branch=incremental_png_loading#2d2838d7
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   revspec '2d2838d7f15aa8347757be4aaa3bb4624fcea264' 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