[INFO] updating cached repository LEARAX/pack_2048
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/LEARAX/pack_2048
[INFO] [stderr]  * branch              HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/LEARAX/pack_2048" "work/ex/clippy-test-run/sources/stable/gh/LEARAX/pack_2048"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/LEARAX/pack_2048'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/LEARAX/pack_2048" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/LEARAX/pack_2048"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/LEARAX/pack_2048'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3de73554b72497eafda48ab42814ca1f698003bd
[INFO] sha for GitHub repo LEARAX/pack_2048: 3de73554b72497eafda48ab42814ca1f698003bd
[INFO] validating manifest of LEARAX/pack_2048 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 LEARAX/pack_2048 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 LEARAX/pack_2048
[INFO] finished frobbing LEARAX/pack_2048
[INFO] frobbed toml for LEARAX/pack_2048 written to work/ex/clippy-test-run/sources/stable/gh/LEARAX/pack_2048/Cargo.toml
[INFO] started frobbing LEARAX/pack_2048
[INFO] finished frobbing LEARAX/pack_2048
[INFO] frobbed toml for LEARAX/pack_2048 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/LEARAX/pack_2048/Cargo.toml
[INFO] crate LEARAX/pack_2048 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 LEARAX/pack_2048 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-3/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/LEARAX/pack_2048:/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] aeda220b7a2d71afe695ff9a043c99e2745719f6f514dd624080d69714875dfd
[INFO] running `"docker" "start" "-a" "aeda220b7a2d71afe695ff9a043c99e2745719f6f514dd624080d69714875dfd"`
[INFO] [stderr]     Checking rand v0.5.4
[INFO] [stderr]     Checking pack_2048 v0.4.4 (/opt/crater/workdir)
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/lib.rs:94:34
[INFO] [stderr]    |
[INFO] [stderr] 94 |             let mut copy_board = board.clone();
[INFO] [stderr]    |                                  ^^^^^^^^^^^^^ help: try dereferencing it: `*board`
[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: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/lib.rs:191:19
[INFO] [stderr]     |
[INFO] [stderr] 191 | fn digits(number: &usize) -> usize {
[INFO] [stderr]     |                   ^^^^^^ help: consider passing by value instead: `usize`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::trivially_copy_pass_by_ref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/lib.rs:94:34
[INFO] [stderr]    |
[INFO] [stderr] 94 |             let mut copy_board = board.clone();
[INFO] [stderr]    |                                  ^^^^^^^^^^^^^ help: try dereferencing it: `*board`
[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: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/lib.rs:191:19
[INFO] [stderr]     |
[INFO] [stderr] 191 | fn digits(number: &usize) -> usize {
[INFO] [stderr]     |                   ^^^^^^ help: consider passing by value instead: `usize`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::trivially_copy_pass_by_ref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.16s
[INFO] running `"docker" "inspect" "aeda220b7a2d71afe695ff9a043c99e2745719f6f514dd624080d69714875dfd"`
[INFO] running `"docker" "rm" "-f" "aeda220b7a2d71afe695ff9a043c99e2745719f6f514dd624080d69714875dfd"`
[INFO] [stdout] aeda220b7a2d71afe695ff9a043c99e2745719f6f514dd624080d69714875dfd