[INFO] updating cached repository waelbendhia/rust-project-euler
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/waelbendhia/rust-project-euler
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/waelbendhia/rust-project-euler" "work/ex/clippy-test-run/sources/stable/gh/waelbendhia/rust-project-euler"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/waelbendhia/rust-project-euler'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/waelbendhia/rust-project-euler" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/waelbendhia/rust-project-euler"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/waelbendhia/rust-project-euler'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9c12fb50b32855629725824b6e118f6601072429
[INFO] sha for GitHub repo waelbendhia/rust-project-euler: 9c12fb50b32855629725824b6e118f6601072429
[INFO] validating manifest of waelbendhia/rust-project-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 waelbendhia/rust-project-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 waelbendhia/rust-project-euler
[INFO] finished frobbing waelbendhia/rust-project-euler
[INFO] frobbed toml for waelbendhia/rust-project-euler written to work/ex/clippy-test-run/sources/stable/gh/waelbendhia/rust-project-euler/Cargo.toml
[INFO] started frobbing waelbendhia/rust-project-euler
[INFO] finished frobbing waelbendhia/rust-project-euler
[INFO] frobbed toml for waelbendhia/rust-project-euler written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/waelbendhia/rust-project-euler/Cargo.toml
[INFO] crate waelbendhia/rust-project-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 waelbendhia/rust-project-euler 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/waelbendhia/rust-project-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] c213e4185ebcc34539de981c45e019e33a3b5746b96c089a67e48ff0db7fa24e
[INFO] running `"docker" "start" "-a" "c213e4185ebcc34539de981c45e019e33a3b5746b96c089a67e48ff0db7fa24e"`
[INFO] [stderr]     Checking num-traits v0.2.2
[INFO] [stderr]     Checking primal-estimate v0.2.1
[INFO] [stderr]     Checking smallvec v0.4.4
[INFO] [stderr]     Checking primal-bit v0.2.4
[INFO] [stderr]     Checking primal-sieve v0.2.8
[INFO] [stderr]     Checking num-integer v0.1.36
[INFO] [stderr]     Checking primal-check v0.2.3
[INFO] [stderr]     Checking primal v0.2.3
[INFO] [stderr]     Checking rust-project-euler v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]  --> src/level7/problem179.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |         solution: solution,
[INFO] [stderr]   |         ^^^^^^^^^^^^^^^^^^ help: replace it with: `solution`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]  --> src/level7/problem187.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |         solution: solution,
[INFO] [stderr]   |         ^^^^^^^^^^^^^^^^^^ help: replace it with: `solution`
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]  --> src/level9/problem206.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |         solution: solution,
[INFO] [stderr]   |         ^^^^^^^^^^^^^^^^^^ help: replace it with: `solution`
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]  --> src/level7/problem179.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |         solution: solution,
[INFO] [stderr]   |         ^^^^^^^^^^^^^^^^^^ help: replace it with: `solution`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]  --> src/level7/problem187.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |         solution: solution,
[INFO] [stderr]   |         ^^^^^^^^^^^^^^^^^^ help: replace it with: `solution`
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]  --> src/level9/problem206.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |         solution: solution,
[INFO] [stderr]   |         ^^^^^^^^^^^^^^^^^^ help: replace it with: `solution`
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]  --> src/level7/problem179.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | /     return problem::Problem {
[INFO] [stderr] 5 | |         ind: 179,
[INFO] [stderr] 6 | |         name: String::from("Consecutive positive divisors"),
[INFO] [stderr] 7 | |         solution: solution,
[INFO] [stderr] 8 | |     };
[INFO] [stderr]   | |______^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]   |
[INFO] [stderr] 4 |     problem::Problem {
[INFO] [stderr] 5 |         ind: 179,
[INFO] [stderr] 6 |         name: String::from("Consecutive positive divisors"),
[INFO] [stderr] 7 |         solution: solution,
[INFO] [stderr] 8 |     }
[INFO] [stderr]   |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/level7/problem179.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     return count_consecutive(all_num_divisors_under(10i64.pow(7)));
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `count_consecutive(all_num_divisors_under(10i64.pow(7)))`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/level7/problem179.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     return total;
[INFO] [stderr]    |     ^^^^^^^^^^^^^ help: remove `return` as shown: `total`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/level7/problem179.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     return divs;
[INFO] [stderr]    |     ^^^^^^^^^^^^ help: remove `return` as shown: `divs`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]  --> src/level7/problem187.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | /     return problem::Problem {
[INFO] [stderr] 6 | |         ind: 187,
[INFO] [stderr] 7 | |         name: String::from("Semiprimes"),
[INFO] [stderr] 8 | |         solution: solution,
[INFO] [stderr] 9 | |     };
[INFO] [stderr]   | |______^
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]   |
[INFO] [stderr] 5 |     problem::Problem {
[INFO] [stderr] 6 |         ind: 187,
[INFO] [stderr] 7 |         name: String::from("Semiprimes"),
[INFO] [stderr] 8 |         solution: solution,
[INFO] [stderr] 9 |     }
[INFO] [stderr]   |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/level7/problem187.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     return count;
[INFO] [stderr]    |     ^^^^^^^^^^^^^ help: remove `return` as shown: `count`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/level7/problem187.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     return facts;
[INFO] [stderr]    |     ^^^^^^^^^^^^^ help: remove `return` as shown: `facts`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/level7/problem187.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     return log;
[INFO] [stderr]    |     ^^^^^^^^^^^ help: remove `return` as shown: `log`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]  --> src/level9/problem206.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | /     return problem::Problem {
[INFO] [stderr] 5 | |         ind: 206,
[INFO] [stderr] 6 | |         name: String::from("Concealed Square"),
[INFO] [stderr] 7 | |         solution: solution,
[INFO] [stderr] 8 | |     };
[INFO] [stderr]   | |______^
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]   |
[INFO] [stderr] 4 |     problem::Problem {
[INFO] [stderr] 5 |         ind: 206,
[INFO] [stderr] 6 |         name: String::from("Concealed Square"),
[INFO] [stderr] 7 |         solution: solution,
[INFO] [stderr] 8 |     }
[INFO] [stderr]   |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/level9/problem206.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     return int_sqrt(opt.unwrap_or(0)) as i64;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `int_sqrt(opt.unwrap_or(0)) as i64`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/level9/problem206.rs:28:13
[INFO] [stderr]    |
[INFO] [stderr] 28 |             return None;
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/level9/problem206.rs:30:17
[INFO] [stderr]    |
[INFO] [stderr] 30 |         None => return None,
[INFO] [stderr]    |                 ^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/level9/problem206.rs:37:23
[INFO] [stderr]    |
[INFO] [stderr] 37 |             Ok(hi) => return Some((lo, hi)),
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some((lo, hi))`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/level9/problem206.rs:38:23
[INFO] [stderr]    |
[INFO] [stderr] 38 |             Err(_) => return None,
[INFO] [stderr]    |                       ^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/level9/problem206.rs:41:13
[INFO] [stderr]    |
[INFO] [stderr] 41 |             return None;
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/level9/problem206.rs:66:5
[INFO] [stderr]    |
[INFO] [stderr] 66 |     return true;
[INFO] [stderr]    |     ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/level9/problem206.rs:70:5
[INFO] [stderr]    |
[INFO] [stderr] 70 |     return (n as f64).sqrt() as u64;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `(n as f64).sqrt() as u64`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/main.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     return (secs as f64) + (nanos as f64 / 10u32.pow(9) as f64);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `(secs as f64) + (nanos as f64 / 10u32.pow(9) as f64)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]  --> src/level7/problem179.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | /     return problem::Problem {
[INFO] [stderr] 5 | |         ind: 179,
[INFO] [stderr] 6 | |         name: String::from("Consecutive positive divisors"),
[INFO] [stderr] 7 | |         solution: solution,
[INFO] [stderr] 8 | |     };
[INFO] [stderr]   | |______^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]   |
[INFO] [stderr] 4 |     problem::Problem {
[INFO] [stderr] 5 |         ind: 179,
[INFO] [stderr] 6 |         name: String::from("Consecutive positive divisors"),
[INFO] [stderr] 7 |         solution: solution,
[INFO] [stderr] 8 |     }
[INFO] [stderr]   |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/level7/problem179.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     return count_consecutive(all_num_divisors_under(10i64.pow(7)));
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `count_consecutive(all_num_divisors_under(10i64.pow(7)))`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/level7/problem179.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     return total;
[INFO] [stderr]    |     ^^^^^^^^^^^^^ help: remove `return` as shown: `total`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/level7/problem179.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     return divs;
[INFO] [stderr]    |     ^^^^^^^^^^^^ help: remove `return` as shown: `divs`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]  --> src/level7/problem187.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | /     return problem::Problem {
[INFO] [stderr] 6 | |         ind: 187,
[INFO] [stderr] 7 | |         name: String::from("Semiprimes"),
[INFO] [stderr] 8 | |         solution: solution,
[INFO] [stderr] 9 | |     };
[INFO] [stderr]   | |______^
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]   |
[INFO] [stderr] 5 |     problem::Problem {
[INFO] [stderr] 6 |         ind: 187,
[INFO] [stderr] 7 |         name: String::from("Semiprimes"),
[INFO] [stderr] 8 |         solution: solution,
[INFO] [stderr] 9 |     }
[INFO] [stderr]   |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/level7/problem187.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     return count;
[INFO] [stderr]    |     ^^^^^^^^^^^^^ help: remove `return` as shown: `count`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/level7/problem187.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     return facts;
[INFO] [stderr]    |     ^^^^^^^^^^^^^ help: remove `return` as shown: `facts`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/level7/problem187.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     return log;
[INFO] [stderr]    |     ^^^^^^^^^^^ help: remove `return` as shown: `log`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]  --> src/level9/problem206.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | /     return problem::Problem {
[INFO] [stderr] 5 | |         ind: 206,
[INFO] [stderr] 6 | |         name: String::from("Concealed Square"),
[INFO] [stderr] 7 | |         solution: solution,
[INFO] [stderr] 8 | |     };
[INFO] [stderr]   | |______^
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]   |
[INFO] [stderr] 4 |     problem::Problem {
[INFO] [stderr] 5 |         ind: 206,
[INFO] [stderr] 6 |         name: String::from("Concealed Square"),
[INFO] [stderr] 7 |         solution: solution,
[INFO] [stderr] 8 |     }
[INFO] [stderr]   |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/level9/problem206.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     return int_sqrt(opt.unwrap_or(0)) as i64;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `int_sqrt(opt.unwrap_or(0)) as i64`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/level9/problem206.rs:28:13
[INFO] [stderr]    |
[INFO] [stderr] 28 |             return None;
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/level9/problem206.rs:30:17
[INFO] [stderr]    |
[INFO] [stderr] 30 |         None => return None,
[INFO] [stderr]    |                 ^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/level9/problem206.rs:37:23
[INFO] [stderr]    |
[INFO] [stderr] 37 |             Ok(hi) => return Some((lo, hi)),
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some((lo, hi))`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/level9/problem206.rs:38:23
[INFO] [stderr]    |
[INFO] [stderr] 38 |             Err(_) => return None,
[INFO] [stderr]    |                       ^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/level9/problem206.rs:41:13
[INFO] [stderr]    |
[INFO] [stderr] 41 |             return None;
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/level9/problem206.rs:66:5
[INFO] [stderr]    |
[INFO] [stderr] 66 |     return true;
[INFO] [stderr]    |     ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/level9/problem206.rs:70:5
[INFO] [stderr]    |
[INFO] [stderr] 70 |     return (n as f64).sqrt() as u64;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `(n as f64).sqrt() as u64`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/main.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     return (secs as f64) + (nanos as f64 / 10u32.pow(9) as f64);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `(secs as f64) + (nanos as f64 / 10u32.pow(9) as f64)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]   --> src/level7/problem179.rs:30:13
[INFO] [stderr]    |
[INFO] [stderr] 30 |             divs[j as usize] = divs[j as usize] + 1;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `divs[j as usize] += 1`
[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: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]   --> src/level9/problem206.rs:34:28
[INFO] [stderr]    |
[INFO] [stderr] 34 | fn range_from_shape(shape: &String) -> Option<(u64, u64)> {
[INFO] [stderr]    |                            ^^^^^^^ help: change this to: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::ptr_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]   --> src/level9/problem206.rs:46:26
[INFO] [stderr]    |
[INFO] [stderr] 46 | fn validate_shape(shape: &String, num: u64) -> bool {
[INFO] [stderr]    |                          ^^^^^^^ help: change this to: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]   --> src/level9/problem206.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 53 | /     loop {
[INFO] [stderr] 54 | |         match shape_iter.next() {
[INFO] [stderr] 55 | |             Some(s) => match num_iter.next() {
[INFO] [stderr] 56 | |                 Some(n) => {
[INFO] [stderr] ...  |
[INFO] [stderr] 64 | |         }
[INFO] [stderr] 65 | |     }
[INFO] [stderr]    | |_____^ help: try: `while let Some(s) = shape_iter.next() { .. }`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::while_let_loop)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:46:29
[INFO] [stderr]    |
[INFO] [stderr] 46 |     return (secs as f64) + (nanos as f64 / 10u32.pow(9) as f64);
[INFO] [stderr]    |                             ^^^^^^^^^^^^ help: try: `f64::from(nanos)`
[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 f64 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:46:44
[INFO] [stderr]    |
[INFO] [stderr] 46 |     return (secs as f64) + (nanos as f64 / 10u32.pow(9) as f64);
[INFO] [stderr]    |                                            ^^^^^^^^^^^^^^^^^^^ help: try: `f64::from(10u32.pow(9))`
[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: manual implementation of an assign operation
[INFO] [stderr]   --> src/level7/problem179.rs:30:13
[INFO] [stderr]    |
[INFO] [stderr] 30 |             divs[j as usize] = divs[j as usize] + 1;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `divs[j as usize] += 1`
[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: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]   --> src/level9/problem206.rs:34:28
[INFO] [stderr]    |
[INFO] [stderr] 34 | fn range_from_shape(shape: &String) -> Option<(u64, u64)> {
[INFO] [stderr]    |                            ^^^^^^^ help: change this to: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::ptr_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]   --> src/level9/problem206.rs:46:26
[INFO] [stderr]    |
[INFO] [stderr] 46 | fn validate_shape(shape: &String, num: u64) -> bool {
[INFO] [stderr]    |                          ^^^^^^^ help: change this to: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]   --> src/level9/problem206.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 53 | /     loop {
[INFO] [stderr] 54 | |         match shape_iter.next() {
[INFO] [stderr] 55 | |             Some(s) => match num_iter.next() {
[INFO] [stderr] 56 | |                 Some(n) => {
[INFO] [stderr] ...  |
[INFO] [stderr] 64 | |         }
[INFO] [stderr] 65 | |     }
[INFO] [stderr]    | |_____^ help: try: `while let Some(s) = shape_iter.next() { .. }`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::while_let_loop)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:46:29
[INFO] [stderr]    |
[INFO] [stderr] 46 |     return (secs as f64) + (nanos as f64 / 10u32.pow(9) as f64);
[INFO] [stderr]    |                             ^^^^^^^^^^^^ help: try: `f64::from(nanos)`
[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 f64 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:46:44
[INFO] [stderr]    |
[INFO] [stderr] 46 |     return (secs as f64) + (nanos as f64 / 10u32.pow(9) as f64);
[INFO] [stderr]    |                                            ^^^^^^^^^^^^^^^^^^^ help: try: `f64::from(10u32.pow(9))`
[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]     Finished dev [unoptimized + debuginfo] target(s) in 6.42s
[INFO] running `"docker" "inspect" "c213e4185ebcc34539de981c45e019e33a3b5746b96c089a67e48ff0db7fa24e"`
[INFO] running `"docker" "rm" "-f" "c213e4185ebcc34539de981c45e019e33a3b5746b96c089a67e48ff0db7fa24e"`
[INFO] [stdout] c213e4185ebcc34539de981c45e019e33a3b5746b96c089a67e48ff0db7fa24e