[INFO] updating cached repository khaivubui/rust_hello
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/khaivubui/rust_hello
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/khaivubui/rust_hello" "work/ex/clippy-test-run/sources/stable/gh/khaivubui/rust_hello"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/khaivubui/rust_hello'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/khaivubui/rust_hello" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/khaivubui/rust_hello"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/khaivubui/rust_hello'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 61f381012fc9be0319fcf2d9283d92ca3aa000ec
[INFO] sha for GitHub repo khaivubui/rust_hello: 61f381012fc9be0319fcf2d9283d92ca3aa000ec
[INFO] validating manifest of khaivubui/rust_hello 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 khaivubui/rust_hello 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 khaivubui/rust_hello
[INFO] finished frobbing khaivubui/rust_hello
[INFO] frobbed toml for khaivubui/rust_hello written to work/ex/clippy-test-run/sources/stable/gh/khaivubui/rust_hello/Cargo.toml
[INFO] started frobbing khaivubui/rust_hello
[INFO] finished frobbing khaivubui/rust_hello
[INFO] frobbed toml for khaivubui/rust_hello written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/khaivubui/rust_hello/Cargo.toml
[INFO] crate khaivubui/rust_hello 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 khaivubui/rust_hello against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-6/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/khaivubui/rust_hello:/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] 8def8c56d108e8b629ac838b98bcff3332c3fdee5953d727c8a6a6a103349b6b
[INFO] running `"docker" "start" "-a" "8def8c56d108e8b629ac838b98bcff3332c3fdee5953d727c8a6a6a103349b6b"`
[INFO] [stderr]     Checking hello v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/main.rs:11:8
[INFO] [stderr]    |
[INFO] [stderr] 11 |     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:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |         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:31:13
[INFO] [stderr]    |
[INFO] [stderr] 31 | /             let t = m;
[INFO] [stderr] 32 | |             m = n;
[INFO] [stderr] 33 | |             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:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 |         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:11:8
[INFO] [stderr]    |
[INFO] [stderr] 11 |     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:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |         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:31:13
[INFO] [stderr]    |
[INFO] [stderr] 31 | /             let t = m;
[INFO] [stderr] 32 | |             m = n;
[INFO] [stderr] 33 | |             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:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 |         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 0.71s
[INFO] running `"docker" "inspect" "8def8c56d108e8b629ac838b98bcff3332c3fdee5953d727c8a6a6a103349b6b"`
[INFO] running `"docker" "rm" "-f" "8def8c56d108e8b629ac838b98bcff3332c3fdee5953d727c8a6a6a103349b6b"`
[INFO] [stdout] 8def8c56d108e8b629ac838b98bcff3332c3fdee5953d727c8a6a6a103349b6b