[INFO] crate barcoders 0.10.0 is already in cache
[INFO] extracting crate barcoders 0.10.0 into work/ex/clippy-test-run/sources/stable/reg/barcoders/0.10.0
[INFO] extracting crate barcoders 0.10.0 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/barcoders/0.10.0
[INFO] validating manifest of barcoders-0.10.0 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 barcoders-0.10.0 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 barcoders-0.10.0
[INFO] finished frobbing barcoders-0.10.0
[INFO] frobbed toml for barcoders-0.10.0 written to work/ex/clippy-test-run/sources/stable/reg/barcoders/0.10.0/Cargo.toml
[INFO] started frobbing barcoders-0.10.0
[INFO] finished frobbing barcoders-0.10.0
[INFO] frobbed toml for barcoders-0.10.0 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/barcoders/0.10.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 barcoders-0.10.0 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-7/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/barcoders/0.10.0:/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] 5429991ffebeb32af909f43cc40a8a547d18f0f687b8fcb9665c03c4543e2126
[INFO] running `"docker" "start" "-a" "5429991ffebeb32af909f43cc40a8a547d18f0f687b8fcb9665c03c4543e2126"`
[INFO] [stderr]     Checking barcoders v0.10.0 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/sym/code39.rs:48:17
[INFO] [stderr]    |
[INFO] [stderr] 48 |                 checksum: checksum,
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^ help: replace it with: `checksum`
[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/sym/code39.rs:48:17
[INFO] [stderr]    |
[INFO] [stderr] 48 |                 checksum: checksum,
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^ help: replace it with: `checksum`
[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: unnecessary parentheses around method argument
[INFO] [stderr]    --> src/sym/code128.rs:260:33
[INFO] [stderr]     |
[INFO] [stderr] 260 |                            .zip((0..self.0.len() as i32))
[INFO] [stderr]     |                                 ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: Consider removing unnecessary double parentheses
[INFO] [stderr]    --> src/sym/code128.rs:260:33
[INFO] [stderr]     |
[INFO] [stderr] 260 |                            .zip((0..self.0.len() as i32))
[INFO] [stderr]     |                                 ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::double_parens)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#double_parens
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around method argument
[INFO] [stderr]    --> src/sym/code128.rs:260:33
[INFO] [stderr]     |
[INFO] [stderr] 260 |                            .zip((0..self.0.len() as i32))
[INFO] [stderr]     |                                 ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: Consider removing unnecessary double parentheses
[INFO] [stderr]    --> src/sym/code128.rs:260:33
[INFO] [stderr]     |
[INFO] [stderr] 260 |                            .zip((0..self.0.len() as i32))
[INFO] [stderr]     |                                 ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::double_parens)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#double_parens
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/sym/ean13.rs:94:45
[INFO] [stderr]    |
[INFO] [stderr] 94 |     fn char_encoding(&self, side: usize, d: &u8) -> [u8; 7] {
[INFO] [stderr]    |                                             ^^^ help: consider passing by value instead: `u8`
[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/sym/ean13.rs:150:9
[INFO] [stderr]     |
[INFO] [stderr] 150 |         (0..10).into_iter().map(|i| char::from_digit(i, 10).unwrap()).collect()
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^ help: consider removing `.into_iter()`: `(0..10)`
[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 argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/sym/ean8.rs:54:45
[INFO] [stderr]    |
[INFO] [stderr] 54 |     fn char_encoding(&self, side: usize, d: &u8) -> [u8; 7] {
[INFO] [stderr]    |                                             ^^^ help: consider passing by value instead: `u8`
[INFO] [stderr]    |
[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/sym/ean8.rs:105:9
[INFO] [stderr]     |
[INFO] [stderr] 105 |         (0..10).into_iter().map(|i| char::from_digit(i, 10).unwrap()).collect()
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^ help: consider removing `.into_iter()`: `(0..10)`
[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: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/sym/ean_supp.rs:66:45
[INFO] [stderr]    |
[INFO] [stderr] 66 |     fn char_encoding(&self, side: usize, d: &u8) -> [u8; 7] {
[INFO] [stderr]    |                                             ^^^ help: consider passing by value instead: `u8`
[INFO] [stderr]    |
[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/sym/ean_supp.rs:138:9
[INFO] [stderr]     |
[INFO] [stderr] 138 |         (0..10).into_iter().map(|i| char::from_digit(i, 10).unwrap()).collect()
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^ help: consider removing `.into_iter()`: `(0..10)`
[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: this `.fold` can be written more succinctly using another method
[INFO] [stderr]   --> src/sym/code39.rs:69:28
[INFO] [stderr]    |
[INFO] [stderr] 69 |         let index = indices.fold(0, |acc, i| acc + i) % CHARS.len();
[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 argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/sym/code39.rs:84:32
[INFO] [stderr]    |
[INFO] [stderr] 84 |     fn char_encoding(&self, c: &char) -> [u8; 12] {
[INFO] [stderr]    |                                ^^^^^ help: consider passing by value instead: `char`
[INFO] [stderr]    |
[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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/sym/code93.rs:62:35
[INFO] [stderr]    |
[INFO] [stderr] 62 |     fn checksum_char(&self, data: &Vec<char>, weight_threshold: usize) -> Option<char> {
[INFO] [stderr]    |                                   ^^^^^^^^^^ help: change this to: `&[char]`
[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 `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/sym/code11.rs:51:35
[INFO] [stderr]    |
[INFO] [stderr] 51 |     fn checksum_char(&self, data: &Vec<char>, weight_threshold: usize) -> Option<char> {
[INFO] [stderr]    |                                   ^^^^^^^^^^ help: change this to: `&[char]`
[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 argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/sym/code128.rs:165:13
[INFO] [stderr]     |
[INFO] [stderr] 165 |     fn unit(&self, n: usize) -> Result<Unit> {
[INFO] [stderr]     |             ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]     |
[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: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/sym/code128.rs:174:14
[INFO] [stderr]     |
[INFO] [stderr] 174 |     fn index(&self) -> Result<usize> {
[INFO] [stderr]     |              ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]     |
[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: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/sym/code128.rs:183:15
[INFO] [stderr]     |
[INFO] [stderr] 183 |     fn lookup(&self, s: &str) -> Result<Unit> {
[INFO] [stderr]     |               ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]     |
[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: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/sym/codabar.rs:26:15
[INFO] [stderr]    |
[INFO] [stderr] 26 |     fn lookup(&self) -> Vec<u8> {
[INFO] [stderr]    |               ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]    |
[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: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/sym/tf.rs:97:32
[INFO] [stderr]    |
[INFO] [stderr] 97 |     fn char_encoding(&self, d: &u8) -> Vec<u8> {
[INFO] [stderr]    |                                ^^^ help: consider passing by value instead: `u8`
[INFO] [stderr]    |
[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: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/sym/tf.rs:111:30
[INFO] [stderr]     |
[INFO] [stderr] 111 |     fn char_widths(&self, d: &u8) -> &'static str {
[INFO] [stderr]     |                              ^^^ help: consider passing by value instead: `u8`
[INFO] [stderr]     |
[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/sym/tf.rs:157:9
[INFO] [stderr]     |
[INFO] [stderr] 157 |         (0..10).into_iter().map(|i| char::from_digit(i, 10).unwrap()).collect()
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^ help: consider removing `.into_iter()`: `(0..10)`
[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: this .into_iter() call is equivalent to .iter() and will not move the slice
[INFO] [stderr]  --> src/sym/helpers.rs:5:27
[INFO] [stderr]   |
[INFO] [stderr] 5 |           .flat_map(|b| b.into_iter())
[INFO] [stderr]   |                           ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::into_iter_on_ref)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/sym/ean13.rs:94:45
[INFO] [stderr]    |
[INFO] [stderr] 94 |     fn char_encoding(&self, side: usize, d: &u8) -> [u8; 7] {
[INFO] [stderr]    |                                             ^^^ help: consider passing by value instead: `u8`
[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/sym/ean13.rs:150:9
[INFO] [stderr]     |
[INFO] [stderr] 150 |         (0..10).into_iter().map(|i| char::from_digit(i, 10).unwrap()).collect()
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^ help: consider removing `.into_iter()`: `(0..10)`
[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 u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/sym/ean13.rs:161:55
[INFO] [stderr]     |
[INFO] [stderr] 161 |         let chars = v.iter().map(|d| char::from_digit(*d as u32, 10).unwrap());
[INFO] [stderr]     |                                                       ^^^^^^^^^ help: try: `u32::from(*d)`
[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: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/sym/ean8.rs:54:45
[INFO] [stderr]    |
[INFO] [stderr] 54 |     fn char_encoding(&self, side: usize, d: &u8) -> [u8; 7] {
[INFO] [stderr]    |                                             ^^^ help: consider passing by value instead: `u8`
[INFO] [stderr]    |
[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/sym/ean8.rs:105:9
[INFO] [stderr]     |
[INFO] [stderr] 105 |         (0..10).into_iter().map(|i| char::from_digit(i, 10).unwrap()).collect()
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^ help: consider removing `.into_iter()`: `(0..10)`
[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: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/sym/ean8.rs:116:55
[INFO] [stderr]     |
[INFO] [stderr] 116 |         let chars = v.iter().map(|d| char::from_digit(*d as u32, 10).unwrap());
[INFO] [stderr]     |                                                       ^^^^^^^^^ help: try: `u32::from(*d)`
[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/sym/ean_supp.rs:66:45
[INFO] [stderr]    |
[INFO] [stderr] 66 |     fn char_encoding(&self, side: usize, d: &u8) -> [u8; 7] {
[INFO] [stderr]    |                                             ^^^ help: consider passing by value instead: `u8`
[INFO] [stderr]    |
[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/sym/ean_supp.rs:138:9
[INFO] [stderr]     |
[INFO] [stderr] 138 |         (0..10).into_iter().map(|i| char::from_digit(i, 10).unwrap()).collect()
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^ help: consider removing `.into_iter()`: `(0..10)`
[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: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/sym/ean_supp.rs:149:55
[INFO] [stderr]     |
[INFO] [stderr] 149 |         let chars = v.iter().map(|d| char::from_digit(*d as u32, 10).unwrap());
[INFO] [stderr]     |                                                       ^^^^^^^^^ help: try: `u32::from(*d)`
[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 `.fold` can be written more succinctly using another method
[INFO] [stderr]   --> src/sym/code39.rs:69:28
[INFO] [stderr]    |
[INFO] [stderr] 69 |         let index = indices.fold(0, |acc, i| acc + i) % CHARS.len();
[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 argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/sym/code39.rs:84:32
[INFO] [stderr]    |
[INFO] [stderr] 84 |     fn char_encoding(&self, c: &char) -> [u8; 12] {
[INFO] [stderr]    |                                ^^^^^ help: consider passing by value instead: `char`
[INFO] [stderr]    |
[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: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/sym/code39.rs:139:55
[INFO] [stderr]     |
[INFO] [stderr] 139 |         let chars = v.iter().map(|d| char::from_digit(*d as u32, 10).unwrap());
[INFO] [stderr]     |                                                       ^^^^^^^^^ help: try: `u32::from(*d)`
[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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/sym/code93.rs:62:35
[INFO] [stderr]    |
[INFO] [stderr] 62 |     fn checksum_char(&self, data: &Vec<char>, weight_threshold: usize) -> Option<char> {
[INFO] [stderr]    |                                   ^^^^^^^^^^ help: change this to: `&[char]`
[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: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/sym/code93.rs:146:55
[INFO] [stderr]     |
[INFO] [stderr] 146 |         let chars = v.iter().map(|d| char::from_digit(*d as u32, 10).unwrap());
[INFO] [stderr]     |                                                       ^^^^^^^^^ help: try: `u32::from(*d)`
[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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/sym/code11.rs:51:35
[INFO] [stderr]    |
[INFO] [stderr] 51 |     fn checksum_char(&self, data: &Vec<char>, weight_threshold: usize) -> Option<char> {
[INFO] [stderr]    |                                   ^^^^^^^^^^ help: change this to: `&[char]`
[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: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/sym/code11.rs:145:55
[INFO] [stderr]     |
[INFO] [stderr] 145 |         let chars = v.iter().map(|d| char::from_digit(*d as u32, 10).unwrap());
[INFO] [stderr]     |                                                       ^^^^^^^^^ help: try: `u32::from(*d)`
[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/sym/code128.rs:165:13
[INFO] [stderr]     |
[INFO] [stderr] 165 |     fn unit(&self, n: usize) -> Result<Unit> {
[INFO] [stderr]     |             ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]     |
[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: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/sym/code128.rs:174:14
[INFO] [stderr]     |
[INFO] [stderr] 174 |     fn index(&self) -> Result<usize> {
[INFO] [stderr]     |              ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]     |
[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: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/sym/code128.rs:183:15
[INFO] [stderr]     |
[INFO] [stderr] 183 |     fn lookup(&self, s: &str) -> Result<Unit> {
[INFO] [stderr]     |               ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]     |
[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: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/sym/code128.rs:301:55
[INFO] [stderr]     |
[INFO] [stderr] 301 |         let chars = v.iter().map(|d| char::from_digit(*d as u32, 10).unwrap());
[INFO] [stderr]     |                                                       ^^^^^^^^^ help: try: `u32::from(*d)`
[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/sym/codabar.rs:26:15
[INFO] [stderr]    |
[INFO] [stderr] 26 |     fn lookup(&self) -> Vec<u8> {
[INFO] [stderr]    |               ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]    |
[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: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/sym/codabar.rs:134:55
[INFO] [stderr]     |
[INFO] [stderr] 134 |         let chars = v.iter().map(|d| char::from_digit(*d as u32, 10).unwrap());
[INFO] [stderr]     |                                                       ^^^^^^^^^ help: try: `u32::from(*d)`
[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/sym/tf.rs:97:32
[INFO] [stderr]    |
[INFO] [stderr] 97 |     fn char_encoding(&self, d: &u8) -> Vec<u8> {
[INFO] [stderr]    |                                ^^^ help: consider passing by value instead: `u8`
[INFO] [stderr]    |
[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: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/sym/tf.rs:111:30
[INFO] [stderr]     |
[INFO] [stderr] 111 |     fn char_widths(&self, d: &u8) -> &'static str {
[INFO] [stderr]     |                              ^^^ help: consider passing by value instead: `u8`
[INFO] [stderr]     |
[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/sym/tf.rs:157:9
[INFO] [stderr]     |
[INFO] [stderr] 157 |         (0..10).into_iter().map(|i| char::from_digit(i, 10).unwrap()).collect()
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^ help: consider removing `.into_iter()`: `(0..10)`
[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: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/sym/tf.rs:168:55
[INFO] [stderr]     |
[INFO] [stderr] 168 |         let chars = v.iter().map(|d| char::from_digit(*d as u32, 10).unwrap());
[INFO] [stderr]     |                                                       ^^^^^^^^^ help: try: `u32::from(*d)`
[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 .into_iter() call is equivalent to .iter() and will not move the slice
[INFO] [stderr]  --> src/sym/helpers.rs:5:27
[INFO] [stderr]   |
[INFO] [stderr] 5 |           .flat_map(|b| b.into_iter())
[INFO] [stderr]   |                           ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::into_iter_on_ref)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.00s
[INFO] running `"docker" "inspect" "5429991ffebeb32af909f43cc40a8a547d18f0f687b8fcb9665c03c4543e2126"`
[INFO] running `"docker" "rm" "-f" "5429991ffebeb32af909f43cc40a8a547d18f0f687b8fcb9665c03c4543e2126"`
[INFO] [stdout] 5429991ffebeb32af909f43cc40a8a547d18f0f687b8fcb9665c03c4543e2126