[INFO] updating cached repository matthewkmayer/pun-on-rust-demo
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/matthewkmayer/pun-on-rust-demo
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/matthewkmayer/pun-on-rust-demo" "work/ex/pr-57745/sources/master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039/gh/matthewkmayer/pun-on-rust-demo"`
[INFO] [stderr] Cloning into 'work/ex/pr-57745/sources/master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039/gh/matthewkmayer/pun-on-rust-demo'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/matthewkmayer/pun-on-rust-demo" "work/ex/pr-57745/sources/try#29640c57b5f92febba0e40c50cb863c9a7ede51d/gh/matthewkmayer/pun-on-rust-demo"`
[INFO] [stderr] Cloning into 'work/ex/pr-57745/sources/try#29640c57b5f92febba0e40c50cb863c9a7ede51d/gh/matthewkmayer/pun-on-rust-demo'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3367adf311af0be5353ee85e424a228776b557f0
[INFO] sha for GitHub repo matthewkmayer/pun-on-rust-demo: 3367adf311af0be5353ee85e424a228776b557f0
[INFO] validating manifest of matthewkmayer/pun-on-rust-demo on toolchain master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f613dc138b4012cf3d2eb40718fbcc7cf0a34039-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of matthewkmayer/pun-on-rust-demo on toolchain try#29640c57b5f92febba0e40c50cb863c9a7ede51d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+29640c57b5f92febba0e40c50cb863c9a7ede51d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing matthewkmayer/pun-on-rust-demo
[INFO] finished frobbing matthewkmayer/pun-on-rust-demo
[INFO] frobbed toml for matthewkmayer/pun-on-rust-demo written to work/ex/pr-57745/sources/master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039/gh/matthewkmayer/pun-on-rust-demo/Cargo.toml
[INFO] started frobbing matthewkmayer/pun-on-rust-demo
[INFO] finished frobbing matthewkmayer/pun-on-rust-demo
[INFO] frobbed toml for matthewkmayer/pun-on-rust-demo written to work/ex/pr-57745/sources/try#29640c57b5f92febba0e40c50cb863c9a7ede51d/gh/matthewkmayer/pun-on-rust-demo/Cargo.toml
[INFO] crate matthewkmayer/pun-on-rust-demo has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f613dc138b4012cf3d2eb40718fbcc7cf0a34039-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-57745/sources/master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039/gh/matthewkmayer/pun-on-rust-demo/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" "+f613dc138b4012cf3d2eb40718fbcc7cf0a34039-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed