[INFO] updating cached repository ElPicador/euler-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ElPicador/euler-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ElPicador/euler-rust" "work/ex/clippy-test-run/sources/stable/gh/ElPicador/euler-rust"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/ElPicador/euler-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ElPicador/euler-rust" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/ElPicador/euler-rust"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/ElPicador/euler-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 34a304c9e2553dace39bbfa1d83d82910feb3ed6
[INFO] sha for GitHub repo ElPicador/euler-rust: 34a304c9e2553dace39bbfa1d83d82910feb3ed6
[INFO] validating manifest of ElPicador/euler-rust 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 ElPicador/euler-rust 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 ElPicador/euler-rust
[INFO] finished frobbing ElPicador/euler-rust
[INFO] frobbed toml for ElPicador/euler-rust written to work/ex/clippy-test-run/sources/stable/gh/ElPicador/euler-rust/Cargo.toml
[INFO] started frobbing ElPicador/euler-rust
[INFO] finished frobbing ElPicador/euler-rust
[INFO] frobbed toml for ElPicador/euler-rust written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/ElPicador/euler-rust/Cargo.toml
[INFO] crate ElPicador/euler-rust 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 ElPicador/euler-rust against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-1/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/ElPicador/euler-rust:/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] 888c1491c8a109397a27ff33945164a8a0162d25ce996df491e1e8945a39f106
[INFO] running `"docker" "start" "-a" "888c1491c8a109397a27ff33945164a8a0162d25ce996df491e1e8945a39f106"`
[INFO] [stderr]     Checking euler-rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]   --> src/problems/problem4.rs:19:30
[INFO] [stderr]    |
[INFO] [stderr] 19 |     let string_rep: String = String::from(int.to_string());
[INFO] [stderr]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `int.to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::identity_conversion)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: this `.fold` can be written more succinctly using another method
[INFO] [stderr]  --> src/problems/problem6.rs:6:42
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let square_of_sum: u64 = range.iter().fold(0u64, |acc, &x| acc + x).pow(2);
[INFO] [stderr]   |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.sum()`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::unnecessary_fold)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[INFO] [stderr] 
[INFO] [stderr] warning: this `.fold` can be written more succinctly using another method
[INFO] [stderr]  --> src/problems/problem7.rs:9:37
[INFO] [stderr]   |
[INFO] [stderr] 9 |         let is_prime = primes.iter().fold(true, |acc, &x| acc && current_number % x != 0);
[INFO] [stderr]   |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.all(|x| current_number % x != 0)`
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[INFO] [stderr] 
[INFO] [stderr] warning: this `.fold` can be written more succinctly using another method
[INFO] [stderr]   --> src/problems/problem8.rs:14:49
[INFO] [stderr]    |
[INFO] [stderr] 14 |         let multiplication: u64 = numbers.iter().fold(1u64, |acc, &x| acc * x);
[INFO] [stderr]    |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.product()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[INFO] [stderr] 
[INFO] [stderr] warning: this `.fold` can be written more succinctly using another method
[INFO] [stderr]   --> src/problems/problem10.rs:24:28
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let sum = primes.iter().fold(0u64, |acc, &x| acc + x);
[INFO] [stderr]    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.sum()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]   --> src/problems/problem4.rs:19:30
[INFO] [stderr]    |
[INFO] [stderr] 19 |     let string_rep: String = String::from(int.to_string());
[INFO] [stderr]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `int.to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::identity_conversion)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: this `.fold` can be written more succinctly using another method
[INFO] [stderr]  --> src/problems/problem6.rs:6:42
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let square_of_sum: u64 = range.iter().fold(0u64, |acc, &x| acc + x).pow(2);
[INFO] [stderr]   |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.sum()`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::unnecessary_fold)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[INFO] [stderr] 
[INFO] [stderr] warning: this `.fold` can be written more succinctly using another method
[INFO] [stderr]  --> src/problems/problem7.rs:9:37
[INFO] [stderr]   |
[INFO] [stderr] 9 |         let is_prime = primes.iter().fold(true, |acc, &x| acc && current_number % x != 0);
[INFO] [stderr]   |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.all(|x| current_number % x != 0)`
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[INFO] [stderr] 
[INFO] [stderr] warning: this `.fold` can be written more succinctly using another method
[INFO] [stderr]   --> src/problems/problem8.rs:14:49
[INFO] [stderr]    |
[INFO] [stderr] 14 |         let multiplication: u64 = numbers.iter().fold(1u64, |acc, &x| acc * x);
[INFO] [stderr]    |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.product()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[INFO] [stderr] 
[INFO] [stderr] warning: this `.fold` can be written more succinctly using another method
[INFO] [stderr]   --> src/problems/problem10.rs:24:28
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let sum = primes.iter().fold(0u64, |acc, &x| acc + x);
[INFO] [stderr]    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.sum()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.04s
[INFO] running `"docker" "inspect" "888c1491c8a109397a27ff33945164a8a0162d25ce996df491e1e8945a39f106"`
[INFO] running `"docker" "rm" "-f" "888c1491c8a109397a27ff33945164a8a0162d25ce996df491e1e8945a39f106"`
[INFO] [stdout] 888c1491c8a109397a27ff33945164a8a0162d25ce996df491e1e8945a39f106