[INFO] updating cached repository t-tonchim/rust_sample
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/t-tonchim/rust_sample
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/t-tonchim/rust_sample" "work/ex/clippy-test-run/sources/stable/gh/t-tonchim/rust_sample"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/t-tonchim/rust_sample'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/t-tonchim/rust_sample" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/t-tonchim/rust_sample"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/t-tonchim/rust_sample'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 18ba5d08aa0ead798ac2bd31ffa49531dbbe1ea0
[INFO] sha for GitHub repo t-tonchim/rust_sample: 18ba5d08aa0ead798ac2bd31ffa49531dbbe1ea0
[INFO] validating manifest of t-tonchim/rust_sample 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 t-tonchim/rust_sample 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 t-tonchim/rust_sample
[INFO] finished frobbing t-tonchim/rust_sample
[INFO] frobbed toml for t-tonchim/rust_sample written to work/ex/clippy-test-run/sources/stable/gh/t-tonchim/rust_sample/Cargo.toml
[INFO] started frobbing t-tonchim/rust_sample
[INFO] finished frobbing t-tonchim/rust_sample
[INFO] frobbed toml for t-tonchim/rust_sample written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/t-tonchim/rust_sample/Cargo.toml
[INFO] crate t-tonchim/rust_sample 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 t-tonchim/rust_sample against stable+rustflags=-Dclippy::into_iter_on_array for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-2/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/t-tonchim/rust_sample:/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 -Dclippy::into_iter_on_array" "-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] e2c0a79323072789aa38b66f9b3c0d2a327e6cfd846aa612a77df8660144f337
[INFO] running `"docker" "start" "-a" "e2c0a79323072789aa38b66f9b3c0d2a327e6cfd846aa612a77df8660144f337"`
[INFO] [stderr]     Checking rust_sample v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/main.rs:12:8
[INFO] [stderr]    |
[INFO] [stderr] 12 |     if numbers.len() == 0 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `numbers.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: use of `writeln!(stderr(), ...).unwrap()`. Consider using `eprintln!` instead
[INFO] [stderr]   --> src/main.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 |         writeln!(std::io::stderr(), "Usage: gcd NUMBER ...").unwrap();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::explicit_write)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_write
[INFO] [stderr] 
[INFO] [stderr] warning: this looks like you are swapping `m` and `n` manually
[INFO] [stderr]   --> src/main.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 | /             let t = m;
[INFO] [stderr] 30 | |             m = n;
[INFO] [stderr] 31 | |             n = t;
[INFO] [stderr]    | |_________________^ help: try: `std::mem::swap(&mut m, &mut n)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::manual_swap)] on by default
[INFO] [stderr]    = note: or maybe you should use `std::mem::replace`?
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_swap
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]   --> src/main.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |         m = m % n;
[INFO] [stderr]    |         ^^^^^^^^^ help: replace it with: `m %= n`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::assign_op_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/main.rs:12:8
[INFO] [stderr]    |
[INFO] [stderr] 12 |     if numbers.len() == 0 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `numbers.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: use of `writeln!(stderr(), ...).unwrap()`. Consider using `eprintln!` instead
[INFO] [stderr]   --> src/main.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 |         writeln!(std::io::stderr(), "Usage: gcd NUMBER ...").unwrap();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::explicit_write)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_write
[INFO] [stderr] 
[INFO] [stderr] warning: this looks like you are swapping `m` and `n` manually
[INFO] [stderr]   --> src/main.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 | /             let t = m;
[INFO] [stderr] 30 | |             m = n;
[INFO] [stderr] 31 | |             n = t;
[INFO] [stderr]    | |_________________^ help: try: `std::mem::swap(&mut m, &mut n)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::manual_swap)] on by default
[INFO] [stderr]    = note: or maybe you should use `std::mem::replace`?
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_swap
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]   --> src/main.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |         m = m % n;
[INFO] [stderr]    |         ^^^^^^^^^ help: replace it with: `m %= n`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::assign_op_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.60s
[INFO] running `"docker" "inspect" "e2c0a79323072789aa38b66f9b3c0d2a327e6cfd846aa612a77df8660144f337"`
[INFO] running `"docker" "rm" "-f" "e2c0a79323072789aa38b66f9b3c0d2a327e6cfd846aa612a77df8660144f337"`
[INFO] [stdout] e2c0a79323072789aa38b66f9b3c0d2a327e6cfd846aa612a77df8660144f337