[INFO] updating cached repository matthewa150/rusty_euler
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/matthewa150/rusty_euler
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/matthewa150/rusty_euler" "work/ex/clippy-test-run/sources/stable/gh/matthewa150/rusty_euler"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/matthewa150/rusty_euler'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/matthewa150/rusty_euler" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/matthewa150/rusty_euler"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/matthewa150/rusty_euler'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b881b96e770cf7d5afd500e68e2561dbc1895306
[INFO] sha for GitHub repo matthewa150/rusty_euler: b881b96e770cf7d5afd500e68e2561dbc1895306
[INFO] validating manifest of matthewa150/rusty_euler 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 matthewa150/rusty_euler 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 matthewa150/rusty_euler
[INFO] finished frobbing matthewa150/rusty_euler
[INFO] frobbed toml for matthewa150/rusty_euler written to work/ex/clippy-test-run/sources/stable/gh/matthewa150/rusty_euler/Cargo.toml
[INFO] started frobbing matthewa150/rusty_euler
[INFO] finished frobbing matthewa150/rusty_euler
[INFO] frobbed toml for matthewa150/rusty_euler written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/matthewa150/rusty_euler/Cargo.toml
[INFO] crate matthewa150/rusty_euler 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 matthewa150/rusty_euler against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-4/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/matthewa150/rusty_euler:/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] 8ecbe59d1d524312de7a1719823decb8df8c80c7da74b0adb7bc1935bb75ade0
[INFO] running `"docker" "start" "-a" "8ecbe59d1d524312de7a1719823decb8df8c80c7da74b0adb7bc1935bb75ade0"`
[INFO] [stderr]     Checking primes v0.2.0
[INFO] [stderr]     Checking num-bigint v0.1.40
[INFO] [stderr]     Checking num-rational v0.1.39
[INFO] [stderr]     Checking num v0.1.40
[INFO] [stderr]     Checking rusty_euler v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/question/one_ten.rs:22:18
[INFO] [stderr]    |
[INFO] [stderr] 22 |         if fib > 4000000 {
[INFO] [stderr]    |                  ^^^^^^^ help: consider: `4_000_000`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unreadable_literal)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/question/one_ten.rs:42:44
[INFO] [stderr]    |
[INFO] [stderr] 42 |     let pset:Vec<u64> = pset.prime_factors(600851475143);
[INFO] [stderr]    |                                            ^^^^^^^^^^^^ help: consider: `600_851_475_143`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/question/one_ten.rs:22:18
[INFO] [stderr]    |
[INFO] [stderr] 22 |         if fib > 4000000 {
[INFO] [stderr]    |                  ^^^^^^^ help: consider: `4_000_000`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unreadable_literal)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/question/one_ten.rs:42:44
[INFO] [stderr]    |
[INFO] [stderr] 42 |     let pset:Vec<u64> = pset.prime_factors(600851475143);
[INFO] [stderr]    |                                            ^^^^^^^^^^^^ help: consider: `600_851_475_143`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]   --> src/question/one_ten.rs:51:28
[INFO] [stderr]    |
[INFO] [stderr] 51 |             let mut flip = String::from(format!("{}",orig));
[INFO] [stderr]    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `format!("{}",orig)`
[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: casting u32 to u64 may become silently lossy if types change
[INFO] [stderr]   --> src/question/one_ten.rs:56:36
[INFO] [stderr]    |
[INFO] [stderr] 56 |                 if orig == flip && (flip as u64) >winner {
[INFO] [stderr]    |                                    ^^^^^^^^^^^^^ help: try: `u64::from(flip)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::cast_lossless)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to u64 may become silently lossy if types change
[INFO] [stderr]   --> src/question/one_ten.rs:57:30
[INFO] [stderr]    |
[INFO] [stderr] 57 |                     winner = flip as u64;
[INFO] [stderr]    |                              ^^^^^^^^^^^ help: try: `u64::from(flip)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]  --> src/question/mod.rs:3:34
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn return_solution(question: &u16) -> String {
[INFO] [stderr]   |                                  ^^^^ help: consider passing by value instead: `u16`
[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: identical conversion
[INFO] [stderr]  --> src/question/mod.rs:6:17
[INFO] [stderr]   |
[INFO] [stderr] 6 |         1    => String::from(format!("{}",one_ten::q_one())),
[INFO] [stderr]   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `format!("{}",one_ten::q_one())`
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]  --> src/question/mod.rs:7:17
[INFO] [stderr]   |
[INFO] [stderr] 7 |         2    => String::from(format!("{}",one_ten::q_two())),
[INFO] [stderr]   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `format!("{}",one_ten::q_two())`
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]  --> src/question/mod.rs:8:17
[INFO] [stderr]   |
[INFO] [stderr] 8 |         3    => String::from(format!("{}",one_ten::q_three())),
[INFO] [stderr]   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `format!("{}",one_ten::q_three())`
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]  --> src/question/mod.rs:9:17
[INFO] [stderr]   |
[INFO] [stderr] 9 |         4    => String::from(format!("{}",one_ten::q_four())),
[INFO] [stderr]   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `format!("{}",one_ten::q_four())`
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]   --> src/question/mod.rs:10:17
[INFO] [stderr]    |
[INFO] [stderr] 10 |         5    => String::from(format!("{}",one_ten::q_five())),
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `format!("{}",one_ten::q_five())`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]   --> src/question/mod.rs:11:17
[INFO] [stderr]    |
[INFO] [stderr] 11 |         6    => String::from(format!("{}",one_ten::q_six())),
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `format!("{}",one_ten::q_six())`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]   --> src/question/mod.rs:12:17
[INFO] [stderr]    |
[INFO] [stderr] 12 |         7    => String::from(format!("{}",one_ten::q_seven())),
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `format!("{}",one_ten::q_seven())`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: Err(_) will match all errors, maybe not a good idea
[INFO] [stderr]   --> src/main.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |         Err(_)=> panic!("oops"),
[INFO] [stderr]    |         ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::match_wild_err_arm)] on by default
[INFO] [stderr]    = note: to remove this warning, match each error separately or use unreachable macro
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_wild_err_arm
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]   --> src/question/one_ten.rs:51:28
[INFO] [stderr]    |
[INFO] [stderr] 51 |             let mut flip = String::from(format!("{}",orig));
[INFO] [stderr]    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `format!("{}",orig)`
[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: casting u32 to u64 may become silently lossy if types change
[INFO] [stderr]   --> src/question/one_ten.rs:56:36
[INFO] [stderr]    |
[INFO] [stderr] 56 |                 if orig == flip && (flip as u64) >winner {
[INFO] [stderr]    |                                    ^^^^^^^^^^^^^ help: try: `u64::from(flip)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::cast_lossless)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to u64 may become silently lossy if types change
[INFO] [stderr]   --> src/question/one_ten.rs:57:30
[INFO] [stderr]    |
[INFO] [stderr] 57 |                     winner = flip as u64;
[INFO] [stderr]    |                              ^^^^^^^^^^^ help: try: `u64::from(flip)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]  --> src/question/mod.rs:3:34
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn return_solution(question: &u16) -> String {
[INFO] [stderr]   |                                  ^^^^ help: consider passing by value instead: `u16`
[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: identical conversion
[INFO] [stderr]  --> src/question/mod.rs:6:17
[INFO] [stderr]   |
[INFO] [stderr] 6 |         1    => String::from(format!("{}",one_ten::q_one())),
[INFO] [stderr]   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `format!("{}",one_ten::q_one())`
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]  --> src/question/mod.rs:7:17
[INFO] [stderr]   |
[INFO] [stderr] 7 |         2    => String::from(format!("{}",one_ten::q_two())),
[INFO] [stderr]   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `format!("{}",one_ten::q_two())`
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]  --> src/question/mod.rs:8:17
[INFO] [stderr]   |
[INFO] [stderr] 8 |         3    => String::from(format!("{}",one_ten::q_three())),
[INFO] [stderr]   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `format!("{}",one_ten::q_three())`
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]  --> src/question/mod.rs:9:17
[INFO] [stderr]   |
[INFO] [stderr] 9 |         4    => String::from(format!("{}",one_ten::q_four())),
[INFO] [stderr]   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `format!("{}",one_ten::q_four())`
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]   --> src/question/mod.rs:10:17
[INFO] [stderr]    |
[INFO] [stderr] 10 |         5    => String::from(format!("{}",one_ten::q_five())),
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `format!("{}",one_ten::q_five())`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]   --> src/question/mod.rs:11:17
[INFO] [stderr]    |
[INFO] [stderr] 11 |         6    => String::from(format!("{}",one_ten::q_six())),
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `format!("{}",one_ten::q_six())`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]   --> src/question/mod.rs:12:17
[INFO] [stderr]    |
[INFO] [stderr] 12 |         7    => String::from(format!("{}",one_ten::q_seven())),
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `format!("{}",one_ten::q_seven())`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: Err(_) will match all errors, maybe not a good idea
[INFO] [stderr]   --> src/main.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |         Err(_)=> panic!("oops"),
[INFO] [stderr]    |         ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::match_wild_err_arm)] on by default
[INFO] [stderr]    = note: to remove this warning, match each error separately or use unreachable macro
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_wild_err_arm
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.77s
[INFO] running `"docker" "inspect" "8ecbe59d1d524312de7a1719823decb8df8c80c7da74b0adb7bc1935bb75ade0"`
[INFO] running `"docker" "rm" "-f" "8ecbe59d1d524312de7a1719823decb8df8c80c7da74b0adb7bc1935bb75ade0"`
[INFO] [stdout] 8ecbe59d1d524312de7a1719823decb8df8c80c7da74b0adb7bc1935bb75ade0