[INFO] updating cached repository dihedral-codes/rust-rref-binary
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/dihedral-codes/rust-rref-binary
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/dihedral-codes/rust-rref-binary" "work/ex/clippy-test-run/sources/stable/gh/dihedral-codes/rust-rref-binary"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/dihedral-codes/rust-rref-binary'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/dihedral-codes/rust-rref-binary" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/dihedral-codes/rust-rref-binary"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/dihedral-codes/rust-rref-binary'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a5ca8a0906ecbacb3a6c8abec67f627658912f67
[INFO] sha for GitHub repo dihedral-codes/rust-rref-binary: a5ca8a0906ecbacb3a6c8abec67f627658912f67
[INFO] validating manifest of dihedral-codes/rust-rref-binary 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 dihedral-codes/rust-rref-binary 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 dihedral-codes/rust-rref-binary
[INFO] finished frobbing dihedral-codes/rust-rref-binary
[INFO] frobbed toml for dihedral-codes/rust-rref-binary written to work/ex/clippy-test-run/sources/stable/gh/dihedral-codes/rust-rref-binary/Cargo.toml
[INFO] started frobbing dihedral-codes/rust-rref-binary
[INFO] finished frobbing dihedral-codes/rust-rref-binary
[INFO] frobbed toml for dihedral-codes/rust-rref-binary written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/dihedral-codes/rust-rref-binary/Cargo.toml
[INFO] crate dihedral-codes/rust-rref-binary has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] linting dihedral-codes/rust-rref-binary against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-5/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/dihedral-codes/rust-rref-binary:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+stable" "clippy" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 10e86e4f618d593d7bef6f8265e1b778a971b3feaa27df3fd83b4b9e13366acf
[INFO] running `"docker" "start" "-a" "10e86e4f618d593d7bef6f8265e1b778a971b3feaa27df3fd83b4b9e13366acf"`
[INFO] [stderr]     Checking rust-rref-binary v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `printmat`
[INFO] [stderr]   --> src/main.rs:64:1
[INFO] [stderr]    |
[INFO] [stderr] 64 | fn printmat(matrix:[u64; N]) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]  --> src/main.rs:7:17
[INFO] [stderr]   |
[INFO] [stderr] 7 |   matrix_rref = matrix.clone();
[INFO] [stderr]   |                 ^^^^^^^^^^^^^^ help: try removing the `clone` call: `matrix`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::clone_on_copy)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is used to index `matrix`
[INFO] [stderr]   --> src/main.rs:52:12
[INFO] [stderr]    |
[INFO] [stderr] 52 |   for i in 0..N {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_range_loop)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]    |
[INFO] [stderr] 52 |   for (i, <item>) in matrix.iter_mut().enumerate().take(N) {
[INFO] [stderr]    |       ^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `printmat`
[INFO] [stderr]   --> src/main.rs:64:1
[INFO] [stderr]    |
[INFO] [stderr] 64 | fn printmat(matrix:[u64; N]) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]  --> src/main.rs:7:17
[INFO] [stderr]   |
[INFO] [stderr] 7 |   matrix_rref = matrix.clone();
[INFO] [stderr]   |                 ^^^^^^^^^^^^^^ help: try removing the `clone` call: `matrix`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::clone_on_copy)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is used to index `matrix`
[INFO] [stderr]   --> src/main.rs:52:12
[INFO] [stderr]    |
[INFO] [stderr] 52 |   for i in 0..N {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_range_loop)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]    |
[INFO] [stderr] 52 |   for (i, <item>) in matrix.iter_mut().enumerate().take(N) {
[INFO] [stderr]    |       ^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `"docker" "inspect" "10e86e4f618d593d7bef6f8265e1b778a971b3feaa27df3fd83b4b9e13366acf"`
[INFO] running `"docker" "rm" "-f" "10e86e4f618d593d7bef6f8265e1b778a971b3feaa27df3fd83b4b9e13366acf"`
[INFO] [stdout] 10e86e4f618d593d7bef6f8265e1b778a971b3feaa27df3fd83b4b9e13366acf