[INFO] updating cached repository performance/IDP_Tool
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/performance/IDP_Tool
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/performance/IDP_Tool" "work/ex/clippy-test-run/sources/stable/gh/performance/IDP_Tool"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/performance/IDP_Tool'...
[INFO] [stderr] done.
[INFO] [stderr] Checking out files:  40% (36/90)   
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[INFO] running `"git" "clone" "work/cache/sources/gh/performance/IDP_Tool" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/performance/IDP_Tool"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/performance/IDP_Tool'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] aa70ccca5b9868b46a43247a6d36fe262c2cff92
[INFO] sha for GitHub repo performance/IDP_Tool: aa70ccca5b9868b46a43247a6d36fe262c2cff92
[INFO] validating manifest of performance/IDP_Tool on toolchain stable
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of performance/IDP_Tool on toolchain stable+rustflags=-Dclippy::into_iter_on_array
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing performance/IDP_Tool
[INFO] finished frobbing performance/IDP_Tool
[INFO] frobbed toml for performance/IDP_Tool written to work/ex/clippy-test-run/sources/stable/gh/performance/IDP_Tool/Cargo.toml
[INFO] started frobbing performance/IDP_Tool
[INFO] finished frobbing performance/IDP_Tool
[INFO] frobbed toml for performance/IDP_Tool written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/performance/IDP_Tool/Cargo.toml
[INFO] crate performance/IDP_Tool has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/performance/IDP_Tool/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" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed