[INFO] updating cached repository akostrikov/rust-web-on-iron
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/akostrikov/rust-web-on-iron
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/akostrikov/rust-web-on-iron" "work/ex/pr-57321/sources/master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104/gh/akostrikov/rust-web-on-iron"`
[INFO] [stderr] Cloning into 'work/ex/pr-57321/sources/master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104/gh/akostrikov/rust-web-on-iron'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/akostrikov/rust-web-on-iron" "work/ex/pr-57321/sources/try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0/gh/akostrikov/rust-web-on-iron"`
[INFO] [stderr] Cloning into 'work/ex/pr-57321/sources/try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0/gh/akostrikov/rust-web-on-iron'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3d8a7d223c089cc1e64b9bc2fcab6939dd8da0f7
[INFO] sha for GitHub repo akostrikov/rust-web-on-iron: 3d8a7d223c089cc1e64b9bc2fcab6939dd8da0f7
[INFO] validating manifest of akostrikov/rust-web-on-iron on toolchain master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0bbc3927e28c22edefe6a1353b5ecc95ea9a104-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of akostrikov/rust-web-on-iron on toolchain try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b9139d2caca1db46014a9c302d5c47cfae0d8ae0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing akostrikov/rust-web-on-iron
[INFO] finished frobbing akostrikov/rust-web-on-iron
[INFO] frobbed toml for akostrikov/rust-web-on-iron written to work/ex/pr-57321/sources/master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104/gh/akostrikov/rust-web-on-iron/Cargo.toml
[INFO] started frobbing akostrikov/rust-web-on-iron
[INFO] finished frobbing akostrikov/rust-web-on-iron
[INFO] frobbed toml for akostrikov/rust-web-on-iron written to work/ex/pr-57321/sources/try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0/gh/akostrikov/rust-web-on-iron/Cargo.toml
[INFO] crate akostrikov/rust-web-on-iron has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0bbc3927e28c22edefe6a1353b5ecc95ea9a104-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/pr-57321/sources/master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104/gh/akostrikov/rust-web-on-iron/Cargo.lock needs to be updated but --locked was passed to prevent this
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0bbc3927e28c22edefe6a1353b5ecc95ea9a104-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed