[INFO] updating cached repository mattrayner/learning-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/mattrayner/learning-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/mattrayner/learning-rust" "work/ex/clippy-test-run/sources/stable/gh/mattrayner/learning-rust"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/mattrayner/learning-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mattrayner/learning-rust" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/mattrayner/learning-rust"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/mattrayner/learning-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 76a51d5948e6b4b3829eb649b52bf0496266591f
[INFO] sha for GitHub repo mattrayner/learning-rust: 76a51d5948e6b4b3829eb649b52bf0496266591f
[INFO] validating manifest of mattrayner/learning-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 mattrayner/learning-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 mattrayner/learning-rust
[INFO] finished frobbing mattrayner/learning-rust
[INFO] frobbed toml for mattrayner/learning-rust written to work/ex/clippy-test-run/sources/stable/gh/mattrayner/learning-rust/Cargo.toml
[INFO] started frobbing mattrayner/learning-rust
[INFO] finished frobbing mattrayner/learning-rust
[INFO] frobbed toml for mattrayner/learning-rust written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/mattrayner/learning-rust/Cargo.toml
[INFO] crate mattrayner/learning-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 mattrayner/learning-rust 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-7/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/mattrayner/learning-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 -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] 8add6efe547cb2175f14d572fc0c2f7a525df3b6c0c9be3188d8c2621d9a7029
[INFO] running `"docker" "start" "-a" "8add6efe547cb2175f14d572fc0c2f7a525df3b6c0c9be3188d8c2621d9a7029"`
[INFO] [stderr]     Checking libc v0.2.38
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]     Checking learning-rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]    --> src/data_structures/mod.rs:252:9
[INFO] [stderr]     |
[INFO] [stderr] 252 |   let ((c,d), (e,f)) = combined;
[INFO] [stderr]     |         ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::many_single_char_names)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]    --> src/data_structures/mod.rs:252:11
[INFO] [stderr]     |
[INFO] [stderr] 252 |   let ((c,d), (e,f)) = combined;
[INFO] [stderr]     |           ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 7th binding whose name is just one char
[INFO] [stderr]    --> src/data_structures/mod.rs:252:16
[INFO] [stderr]     |
[INFO] [stderr] 252 |   let ((c,d), (e,f)) = combined;
[INFO] [stderr]     |                ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 8th binding whose name is just one char
[INFO] [stderr]    --> src/data_structures/mod.rs:252:18
[INFO] [stderr]     |
[INFO] [stderr] 252 |   let ((c,d), (e,f)) = combined;
[INFO] [stderr]     |                  ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: literal with an empty format string
[INFO] [stderr]   --> src/functions.rs:74:29
[INFO] [stderr]    |
[INFO] [stderr] 74 |     println!("{} + 2 = {}", 7, plus_two(7));
[INFO] [stderr]    |                             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::print_literal)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#print_literal
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/traits.rs:20:15
[INFO] [stderr]    |
[INFO] [stderr] 20 |       Human { name: name }
[INFO] [stderr]    |               ^^^^^^^^^^ help: replace it with: `name`
[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/traits.rs:38:13
[INFO] [stderr]    |
[INFO] [stderr] 38 |       Cat { name: name }
[INFO] [stderr]    |             ^^^^^^^^^^ help: replace it with: `name`
[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: 5th binding whose name is just one char
[INFO] [stderr]   --> src/main.rs:39:7
[INFO] [stderr]    |
[INFO] [stderr] 39 |   let d:char = 'x';
[INFO] [stderr]    |       ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]   --> src/main.rs:42:7
[INFO] [stderr]    |
[INFO] [stderr] 42 |   let e = 2.5; // double-precision, 8 bytes, or 64 bits, f64 - can also be f32 for smaller memory usage
[INFO] [stderr]    |       ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 7th binding whose name is just one char
[INFO] [stderr]   --> src/main.rs:46:7
[INFO] [stderr]    |
[INFO] [stderr] 46 |   let f = false;
[INFO] [stderr]    |       ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 8th binding whose name is just one char
[INFO] [stderr]   --> src/main.rs:49:7
[INFO] [stderr]    |
[INFO] [stderr] 49 |   let g = 4>0;
[INFO] [stderr]    |       ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: literal with an empty format string
[INFO] [stderr]   --> src/main.rs:62:44
[INFO] [stderr]    |
[INFO] [stderr] 62 |   println!("remainder of {} / {} = {}", a, 3, (a%3));
[INFO] [stderr]    |                                            ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#print_literal
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]    --> src/data_structures/mod.rs:252:9
[INFO] [stderr]     |
[INFO] [stderr] 252 |   let ((c,d), (e,f)) = combined;
[INFO] [stderr]     |         ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::many_single_char_names)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]    --> src/data_structures/mod.rs:252:11
[INFO] [stderr]     |
[INFO] [stderr] 252 |   let ((c,d), (e,f)) = combined;
[INFO] [stderr]     |           ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 7th binding whose name is just one char
[INFO] [stderr]    --> src/data_structures/mod.rs:252:16
[INFO] [stderr]     |
[INFO] [stderr] 252 |   let ((c,d), (e,f)) = combined;
[INFO] [stderr]     |                ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 8th binding whose name is just one char
[INFO] [stderr]    --> src/data_structures/mod.rs:252:18
[INFO] [stderr]     |
[INFO] [stderr] 252 |   let ((c,d), (e,f)) = combined;
[INFO] [stderr]     |                  ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: literal with an empty format string
[INFO] [stderr]   --> src/functions.rs:74:29
[INFO] [stderr]    |
[INFO] [stderr] 74 |     println!("{} + 2 = {}", 7, plus_two(7));
[INFO] [stderr]    |                             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::print_literal)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#print_literal
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/traits.rs:20:15
[INFO] [stderr]    |
[INFO] [stderr] 20 |       Human { name: name }
[INFO] [stderr]    |               ^^^^^^^^^^ help: replace it with: `name`
[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/traits.rs:38:13
[INFO] [stderr]    |
[INFO] [stderr] 38 |       Cat { name: name }
[INFO] [stderr]    |             ^^^^^^^^^^ help: replace it with: `name`
[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: 5th binding whose name is just one char
[INFO] [stderr]   --> src/main.rs:39:7
[INFO] [stderr]    |
[INFO] [stderr] 39 |   let d:char = 'x';
[INFO] [stderr]    |       ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]   --> src/main.rs:42:7
[INFO] [stderr]    |
[INFO] [stderr] 42 |   let e = 2.5; // double-precision, 8 bytes, or 64 bits, f64 - can also be f32 for smaller memory usage
[INFO] [stderr]    |       ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 7th binding whose name is just one char
[INFO] [stderr]   --> src/main.rs:46:7
[INFO] [stderr]    |
[INFO] [stderr] 46 |   let f = false;
[INFO] [stderr]    |       ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 8th binding whose name is just one char
[INFO] [stderr]   --> src/main.rs:49:7
[INFO] [stderr]    |
[INFO] [stderr] 49 |   let g = 4>0;
[INFO] [stderr]    |       ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: literal with an empty format string
[INFO] [stderr]   --> src/main.rs:62:44
[INFO] [stderr]    |
[INFO] [stderr] 62 |   println!("remainder of {} / {} = {}", a, 3, (a%3));
[INFO] [stderr]    |                                            ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#print_literal
[INFO] [stderr] 
[INFO] [stderr] warning: Variant name ends with the enum's name
[INFO] [stderr]   --> src/data_structures/pattern_matching.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     RgbColour(u8, u8, u8), // tuple
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::enum_variant_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#enum_variant_names
[INFO] [stderr] 
[INFO] [stderr] warning: Variant name ends with the enum's name
[INFO] [stderr]   --> src/data_structures/pattern_matching.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 | /     CmykColour{
[INFO] [stderr] 37 | |       cyan:    u8,
[INFO] [stderr] 38 | |       magenta: u8,
[INFO] [stderr] 39 | |       yellow:  u8,
[INFO] [stderr] 40 | |       black:   u8
[INFO] [stderr] 41 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#enum_variant_names
[INFO] [stderr] 
[INFO] [stderr] warning: Variant name ends with the enum's name
[INFO] [stderr]   --> src/data_structures/mod.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     RgbColour(u8, u8, u8), // tuple
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#enum_variant_names
[INFO] [stderr] 
[INFO] [stderr] warning: Variant name ends with the enum's name
[INFO] [stderr]   --> src/data_structures/mod.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 | /     CmykColour{
[INFO] [stderr] 32 | |       cyan:    u8,
[INFO] [stderr] 33 | |       magenta: u8,
[INFO] [stderr] 34 | |       yellow:  u8,
[INFO] [stderr] 35 | |       black:   u8
[INFO] [stderr] 36 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#enum_variant_names
[INFO] [stderr] 
[INFO] [stderr] warning: You matched a field with a wildcard pattern. Consider using `..` instead
[INFO] [stderr]   --> src/data_structures/mod.rs:47:26
[INFO] [stderr]    |
[INFO] [stderr] 47 |     Colour::CmykColour { cyan: _, magenta: _, yellow: _, black: 255 } => println!("black"),
[INFO] [stderr]    |                          ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unneeded_field_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: You matched a field with a wildcard pattern. Consider using `..` instead
[INFO] [stderr]   --> src/data_structures/mod.rs:47:35
[INFO] [stderr]    |
[INFO] [stderr] 47 |     Colour::CmykColour { cyan: _, magenta: _, yellow: _, black: 255 } => println!("black"),
[INFO] [stderr]    |                                   ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: You matched a field with a wildcard pattern. Consider using `..` instead
[INFO] [stderr]   --> src/data_structures/mod.rs:47:47
[INFO] [stderr]    |
[INFO] [stderr] 47 |     Colour::CmykColour { cyan: _, magenta: _, yellow: _, black: 255 } => println!("black"),
[INFO] [stderr]    |                                               ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: Try with `CmykColour { black: 255, .. }`
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/main.rs:27:15
[INFO] [stderr]    |
[INFO] [stderr] 27 |   let mut c = 123456789; //32-bit signed i32
[INFO] [stderr]    |               ^^^^^^^^^ help: consider: `123_456_789`
[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/main.rs:29:8
[INFO] [stderr]    |
[INFO] [stderr] 29 |   c = -123456789;
[INFO] [stderr]    |        ^^^^^^^^^ help: consider: `123_456_789`
[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: Variant name ends with the enum's name
[INFO] [stderr]   --> src/data_structures/pattern_matching.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     RgbColour(u8, u8, u8), // tuple
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::enum_variant_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#enum_variant_names
[INFO] [stderr] 
[INFO] [stderr] warning: Variant name ends with the enum's name
[INFO] [stderr]   --> src/data_structures/pattern_matching.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 | /     CmykColour{
[INFO] [stderr] 37 | |       cyan:    u8,
[INFO] [stderr] 38 | |       magenta: u8,
[INFO] [stderr] 39 | |       yellow:  u8,
[INFO] [stderr] 40 | |       black:   u8
[INFO] [stderr] 41 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#enum_variant_names
[INFO] [stderr] 
[INFO] [stderr] warning: Variant name ends with the enum's name
[INFO] [stderr]   --> src/data_structures/mod.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     RgbColour(u8, u8, u8), // tuple
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#enum_variant_names
[INFO] [stderr] 
[INFO] [stderr] warning: Variant name ends with the enum's name
[INFO] [stderr]   --> src/data_structures/mod.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 | /     CmykColour{
[INFO] [stderr] 32 | |       cyan:    u8,
[INFO] [stderr] 33 | |       magenta: u8,
[INFO] [stderr] 34 | |       yellow:  u8,
[INFO] [stderr] 35 | |       black:   u8
[INFO] [stderr] 36 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#enum_variant_names
[INFO] [stderr] 
[INFO] [stderr] warning: You matched a field with a wildcard pattern. Consider using `..` instead
[INFO] [stderr]   --> src/data_structures/mod.rs:47:26
[INFO] [stderr]    |
[INFO] [stderr] 47 |     Colour::CmykColour { cyan: _, magenta: _, yellow: _, black: 255 } => println!("black"),
[INFO] [stderr]    |                          ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unneeded_field_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: You matched a field with a wildcard pattern. Consider using `..` instead
[INFO] [stderr]   --> src/data_structures/mod.rs:47:35
[INFO] [stderr]    |
[INFO] [stderr] 47 |     Colour::CmykColour { cyan: _, magenta: _, yellow: _, black: 255 } => println!("black"),
[INFO] [stderr]    |                                   ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: You matched a field with a wildcard pattern. Consider using `..` instead
[INFO] [stderr]   --> src/data_structures/mod.rs:47:47
[INFO] [stderr]    |
[INFO] [stderr] 47 |     Colour::CmykColour { cyan: _, magenta: _, yellow: _, black: 255 } => println!("black"),
[INFO] [stderr]    |                                               ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: Try with `CmykColour { black: 255, .. }`
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/main.rs:27:15
[INFO] [stderr]    |
[INFO] [stderr] 27 |   let mut c = 123456789; //32-bit signed i32
[INFO] [stderr]    |               ^^^^^^^^^ help: consider: `123_456_789`
[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/main.rs:29:8
[INFO] [stderr]    |
[INFO] [stderr] 29 |   c = -123456789;
[INFO] [stderr]    |        ^^^^^^^^^ help: consider: `123_456_789`
[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: some ranges overlap
[INFO] [stderr]   --> src/control_flow.rs:65:5
[INFO] [stderr]    |
[INFO] [stderr] 65 |     1...999 => "unknown", // A range with three dots is INCLUSIVE of the right hand side
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::match_overlapping_arm)] on by default
[INFO] [stderr] note: overlaps with this
[INFO] [stderr]   --> src/control_flow.rs:64:5
[INFO] [stderr]    |
[INFO] [stderr] 64 |     7 => "Russia",
[INFO] [stderr]    |     ^
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_overlapping_arm
[INFO] [stderr] 
[INFO] [stderr] warning: some ranges overlap
[INFO] [stderr]   --> src/control_flow.rs:65:5
[INFO] [stderr]    |
[INFO] [stderr] 65 |     1...999 => "unknown", // A range with three dots is INCLUSIVE of the right hand side
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::match_overlapping_arm)] on by default
[INFO] [stderr] note: overlaps with this
[INFO] [stderr]   --> src/control_flow.rs:64:5
[INFO] [stderr]    |
[INFO] [stderr] 64 |     7 => "Russia",
[INFO] [stderr]    |     ^
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_overlapping_arm
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is used to index `b`
[INFO] [stderr]    --> src/data_structures/mod.rs:119:12
[INFO] [stderr]     |
[INFO] [stderr] 119 |   for i in 0..b.len() {
[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] 119 |   for (i, <item>) in b.iter().enumerate() {
[INFO] [stderr]     |       ^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is used to index `mtx`
[INFO] [stderr]    --> src/data_structures/mod.rs:131:12
[INFO] [stderr]     |
[INFO] [stderr] 131 |   for i in 0..mtx.len() {
[INFO] [stderr]     |            ^^^^^^^^^^^^
[INFO] [stderr]     |
[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] 131 |   for (i, <item>) in mtx.iter().enumerate() {
[INFO] [stderr]     |       ^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/data_structures/mod.rs:163:3
[INFO] [stderr]     |
[INFO] [stderr] 163 | /   match a.pop() { // returns an Option
[INFO] [stderr] 164 | |     Some(x) => println!("Popped {:?} from a, a = {:?}", x, a),
[INFO] [stderr] 165 | |     _ => {}
[INFO] [stderr] 166 | |   }
[INFO] [stderr]     | |___^ help: try this: `if let Some(x) = a.pop() { println!("Popped {:?} from a, a = {:?}", x, a) }`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::single_match)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] 
[INFO] [stderr] warning: casting character literal to u8. `char`s are 4 bytes wide in rust, so casting to u8 truncates them
[INFO] [stderr]    --> src/data_structures/mod.rs:206:15
[INFO] [stderr]     |
[INFO] [stderr] 206 |   let mut a = 'a' as u8;
[INFO] [stderr]     |               ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::char_lit_as_u8)] on by default
[INFO] [stderr]     = help: Consider using a byte literal instead:
[INFO] [stderr]             b'a'
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#char_lit_as_u8
[INFO] [stderr] 
[INFO] [stderr] warning: casting character literal to u8. `char`s are 4 bytes wide in rust, so casting to u8 truncates them
[INFO] [stderr]    --> src/data_structures/mod.rs:207:14
[INFO] [stderr]     |
[INFO] [stderr] 207 |   while a <= ('z' as u8) {
[INFO] [stderr]     |              ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: Consider using a byte literal instead:
[INFO] [stderr]             b'z'
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#char_lit_as_u8
[INFO] [stderr] 
[INFO] [stderr] warning: use of a blacklisted/placeholder name `foo`
[INFO] [stderr]    --> src/data_structures/mod.rs:255:7
[INFO] [stderr]     |
[INFO] [stderr] 255 |   let foo = (true, 42.0, -1i8);
[INFO] [stderr]     |       ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::blacklisted_name)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#blacklisted_name
[INFO] [stderr] 
[INFO] [stderr] warning: this `.fold` can be written more succinctly using another method
[INFO] [stderr]    --> src/functions.rs:118:31
[INFO] [stderr]     |
[INFO] [stderr] 118 |         .filter(|x| is_even(*x))
[INFO] [stderr]     |  _______________________________^
[INFO] [stderr] 119 | |       .fold(0, |sum, x| sum + x);
[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: the loop variable `i` is used to index `b`
[INFO] [stderr]    --> src/data_structures/mod.rs:119:12
[INFO] [stderr]     |
[INFO] [stderr] 119 |   for i in 0..b.len() {
[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] 119 |   for (i, <item>) in b.iter().enumerate() {
[INFO] [stderr]     |       ^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is used to index `mtx`
[INFO] [stderr]    --> src/data_structures/mod.rs:131:12
[INFO] [stderr]     |
[INFO] [stderr] 131 |   for i in 0..mtx.len() {
[INFO] [stderr]     |            ^^^^^^^^^^^^
[INFO] [stderr]     |
[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] 131 |   for (i, <item>) in mtx.iter().enumerate() {
[INFO] [stderr]     |       ^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/data_structures/mod.rs:163:3
[INFO] [stderr]     |
[INFO] [stderr] 163 | /   match a.pop() { // returns an Option
[INFO] [stderr] 164 | |     Some(x) => println!("Popped {:?} from a, a = {:?}", x, a),
[INFO] [stderr] 165 | |     _ => {}
[INFO] [stderr] 166 | |   }
[INFO] [stderr]     | |___^ help: try this: `if let Some(x) = a.pop() { println!("Popped {:?} from a, a = {:?}", x, a) }`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::single_match)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] 
[INFO] [stderr] warning: casting character literal to u8. `char`s are 4 bytes wide in rust, so casting to u8 truncates them
[INFO] [stderr]    --> src/data_structures/mod.rs:206:15
[INFO] [stderr]     |
[INFO] [stderr] 206 |   let mut a = 'a' as u8;
[INFO] [stderr]     |               ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::char_lit_as_u8)] on by default
[INFO] [stderr]     = help: Consider using a byte literal instead:
[INFO] [stderr]             b'a'
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#char_lit_as_u8
[INFO] [stderr] 
[INFO] [stderr] warning: casting character literal to u8. `char`s are 4 bytes wide in rust, so casting to u8 truncates them
[INFO] [stderr]    --> src/data_structures/mod.rs:207:14
[INFO] [stderr]     |
[INFO] [stderr] 207 |   while a <= ('z' as u8) {
[INFO] [stderr]     |              ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: Consider using a byte literal instead:
[INFO] [stderr]             b'z'
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#char_lit_as_u8
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]   --> src/main.rs:57:3
[INFO] [stderr]    |
[INFO] [stderr] 57 |   a = a+1; // -- and ++ are not supported in Rust
[INFO] [stderr]    |   ^^^^^^^ help: replace it with: `a += 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: use of a blacklisted/placeholder name `foo`
[INFO] [stderr]    --> src/data_structures/mod.rs:255:7
[INFO] [stderr]     |
[INFO] [stderr] 255 |   let foo = (true, 42.0, -1i8);
[INFO] [stderr]     |       ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::blacklisted_name)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#blacklisted_name
[INFO] [stderr] 
[INFO] [stderr] warning: this `.fold` can be written more succinctly using another method
[INFO] [stderr]    --> src/functions.rs:118:31
[INFO] [stderr]     |
[INFO] [stderr] 118 |         .filter(|x| is_even(*x))
[INFO] [stderr]     |  _______________________________^
[INFO] [stderr] 119 | |       .fold(0, |sum, x| sum + x);
[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: manual implementation of an assign operation
[INFO] [stderr]   --> src/main.rs:57:3
[INFO] [stderr]    |
[INFO] [stderr] 57 |   a = a+1; // -- and ++ are not supported in Rust
[INFO] [stderr]    |   ^^^^^^^ help: replace it with: `a += 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]     Finished dev [unoptimized + debuginfo] target(s) in 5.53s
[INFO] running `"docker" "inspect" "8add6efe547cb2175f14d572fc0c2f7a525df3b6c0c9be3188d8c2621d9a7029"`
[INFO] running `"docker" "rm" "-f" "8add6efe547cb2175f14d572fc0c2f7a525df3b6c0c9be3188d8c2621d9a7029"`
[INFO] [stdout] 8add6efe547cb2175f14d572fc0c2f7a525df3b6c0c9be3188d8c2621d9a7029