[INFO] updating cached repository rustomax/rust-collatz
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/rustomax/rust-collatz
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/rustomax/rust-collatz" "work/ex/clippy-test-run/sources/stable/gh/rustomax/rust-collatz"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/rustomax/rust-collatz'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/rustomax/rust-collatz" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/rustomax/rust-collatz"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/rustomax/rust-collatz'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3e1decc553aabe0f0619dab9ba750c704e664781
[INFO] sha for GitHub repo rustomax/rust-collatz: 3e1decc553aabe0f0619dab9ba750c704e664781
[INFO] validating manifest of rustomax/rust-collatz 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 rustomax/rust-collatz 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 rustomax/rust-collatz
[INFO] finished frobbing rustomax/rust-collatz
[INFO] frobbed toml for rustomax/rust-collatz written to work/ex/clippy-test-run/sources/stable/gh/rustomax/rust-collatz/Cargo.toml
[INFO] started frobbing rustomax/rust-collatz
[INFO] finished frobbing rustomax/rust-collatz
[INFO] frobbed toml for rustomax/rust-collatz written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/rustomax/rust-collatz/Cargo.toml
[INFO] crate rustomax/rust-collatz 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 rustomax/rust-collatz 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-6/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/rustomax/rust-collatz:/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] 277c8cf1569922a01cf4c587e5756de069c86bd467272e7f4420faeec214668a
[INFO] running `"docker" "start" "-a" "277c8cf1569922a01cf4c587e5756de069c86bd467272e7f4420faeec214668a"`
[INFO] [stderr]     Checking collatz v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: using `println!("")`
[INFO] [stderr]  --> src/main.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     println!("");
[INFO] [stderr]   |     ^^^^^^^^^^^^ help: replace it with: `println!()`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::println_empty_string)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#println_empty_string
[INFO] [stderr] 
[INFO] [stderr] warning: using `println!("")`
[INFO] [stderr]  --> src/main.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     println!("");
[INFO] [stderr]   |     ^^^^^^^^^^^^ help: replace it with: `println!()`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::println_empty_string)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#println_empty_string
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `v`.
[INFO] [stderr]   --> src/collatz.rs:38:14
[INFO] [stderr]    |
[INFO] [stderr] 38 |     for i in 0..7 {
[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] 38 |     for <item> in &v {
[INFO] [stderr]    |         ^^^^^^    ^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `"docker" "inspect" "277c8cf1569922a01cf4c587e5756de069c86bd467272e7f4420faeec214668a"`
[INFO] running `"docker" "rm" "-f" "277c8cf1569922a01cf4c587e5756de069c86bd467272e7f4420faeec214668a"`
[INFO] [stdout] 277c8cf1569922a01cf4c587e5756de069c86bd467272e7f4420faeec214668a