[INFO] updating cached repository nmaswood/Rust-Machine-Learning
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/nmaswood/Rust-Machine-Learning
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/nmaswood/Rust-Machine-Learning" "work/ex/pr-57501/sources/master#6ecad338381cc3b8d56e2df22e5971a598eddd6c/gh/nmaswood/Rust-Machine-Learning"`
[INFO] [stderr] Cloning into 'work/ex/pr-57501/sources/master#6ecad338381cc3b8d56e2df22e5971a598eddd6c/gh/nmaswood/Rust-Machine-Learning'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/nmaswood/Rust-Machine-Learning" "work/ex/pr-57501/sources/try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f/gh/nmaswood/Rust-Machine-Learning"`
[INFO] [stderr] Cloning into 'work/ex/pr-57501/sources/try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f/gh/nmaswood/Rust-Machine-Learning'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a870921d8282eeee6854da71c96563f491b47b56
[INFO] sha for GitHub repo nmaswood/Rust-Machine-Learning: a870921d8282eeee6854da71c96563f491b47b56
[INFO] validating manifest of nmaswood/Rust-Machine-Learning on toolchain master#6ecad338381cc3b8d56e2df22e5971a598eddd6c
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+6ecad338381cc3b8d56e2df22e5971a598eddd6c-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of nmaswood/Rust-Machine-Learning on toolchain try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f789154f114767b2d0cb9c5b6c592cb3a635e6f-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing nmaswood/Rust-Machine-Learning
[INFO] finished frobbing nmaswood/Rust-Machine-Learning
[INFO] frobbed toml for nmaswood/Rust-Machine-Learning written to work/ex/pr-57501/sources/master#6ecad338381cc3b8d56e2df22e5971a598eddd6c/gh/nmaswood/Rust-Machine-Learning/Cargo.toml
[INFO] started frobbing nmaswood/Rust-Machine-Learning
[INFO] finished frobbing nmaswood/Rust-Machine-Learning
[INFO] frobbed toml for nmaswood/Rust-Machine-Learning written to work/ex/pr-57501/sources/try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f/gh/nmaswood/Rust-Machine-Learning/Cargo.toml
[INFO] crate nmaswood/Rust-Machine-Learning has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+6ecad338381cc3b8d56e2df22e5971a598eddd6c-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/pr-57501/sources/master#6ecad338381cc3b8d56e2df22e5971a598eddd6c/gh/nmaswood/Rust-Machine-Learning/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" "+6ecad338381cc3b8d56e2df22e5971a598eddd6c-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed