[INFO] updating cached repository rust-lang-nursery/polonius
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/rust-lang-nursery/polonius
[INFO] [stderr]  * branch                  HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/rust-lang-nursery/polonius" "work/ex/pr-57609/sources/master#03acbd71c977cd63ce5f39ba9b6fe9ffd578785a/gh/rust-lang-nursery/polonius"`
[INFO] [stderr] Cloning into 'work/ex/pr-57609/sources/master#03acbd71c977cd63ce5f39ba9b6fe9ffd578785a/gh/rust-lang-nursery/polonius'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/rust-lang-nursery/polonius" "work/ex/pr-57609/sources/try#26f8d250bb3c8a85e812cf663c730ef9e0df9315/gh/rust-lang-nursery/polonius"`
[INFO] [stderr] Cloning into 'work/ex/pr-57609/sources/try#26f8d250bb3c8a85e812cf663c730ef9e0df9315/gh/rust-lang-nursery/polonius'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3ed4378aa9ab0c3fa66beef0253960376ba8316b
[INFO] sha for GitHub repo rust-lang-nursery/polonius: 3ed4378aa9ab0c3fa66beef0253960376ba8316b
[INFO] validating manifest of rust-lang-nursery/polonius on toolchain master#03acbd71c977cd63ce5f39ba9b6fe9ffd578785a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+03acbd71c977cd63ce5f39ba9b6fe9ffd578785a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of rust-lang-nursery/polonius on toolchain try#26f8d250bb3c8a85e812cf663c730ef9e0df9315
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+26f8d250bb3c8a85e812cf663c730ef9e0df9315-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing rust-lang-nursery/polonius
[INFO] removed workspace from rust-lang-nursery/polonius
[INFO] removed path dependency polonius-engine from rust-lang-nursery/polonius
[INFO] removed path dependency polonius-parser from rust-lang-nursery/polonius
[INFO] finished frobbing rust-lang-nursery/polonius
[INFO] frobbed toml for rust-lang-nursery/polonius written to work/ex/pr-57609/sources/master#03acbd71c977cd63ce5f39ba9b6fe9ffd578785a/gh/rust-lang-nursery/polonius/Cargo.toml
[INFO] started frobbing rust-lang-nursery/polonius
[INFO] removed workspace from rust-lang-nursery/polonius
[INFO] removed path dependency polonius-engine from rust-lang-nursery/polonius
[INFO] removed path dependency polonius-parser from rust-lang-nursery/polonius
[INFO] finished frobbing rust-lang-nursery/polonius
[INFO] frobbed toml for rust-lang-nursery/polonius written to work/ex/pr-57609/sources/try#26f8d250bb3c8a85e812cf663c730ef9e0df9315/gh/rust-lang-nursery/polonius/Cargo.toml
[INFO] crate rust-lang-nursery/polonius has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+03acbd71c977cd63ce5f39ba9b6fe9ffd578785a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/pr-57609/sources/master#03acbd71c977cd63ce5f39ba9b6fe9ffd578785a/gh/rust-lang-nursery/polonius/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" "+03acbd71c977cd63ce5f39ba9b6fe9ffd578785a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed