[INFO] updating cached repository kigawas/examples-in-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/kigawas/examples-in-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/kigawas/examples-in-rust" "work/ex/clippy-test-run/sources/stable/gh/kigawas/examples-in-rust"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/kigawas/examples-in-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/kigawas/examples-in-rust" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/kigawas/examples-in-rust"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/kigawas/examples-in-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] bc0ce30ca9ac369134ece5875ff23d60edc51da7
[INFO] sha for GitHub repo kigawas/examples-in-rust: bc0ce30ca9ac369134ece5875ff23d60edc51da7
[INFO] validating manifest of kigawas/examples-in-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 kigawas/examples-in-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 kigawas/examples-in-rust
[INFO] finished frobbing kigawas/examples-in-rust
[INFO] frobbed toml for kigawas/examples-in-rust written to work/ex/clippy-test-run/sources/stable/gh/kigawas/examples-in-rust/Cargo.toml
[INFO] started frobbing kigawas/examples-in-rust
[INFO] finished frobbing kigawas/examples-in-rust
[INFO] frobbed toml for kigawas/examples-in-rust written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/kigawas/examples-in-rust/Cargo.toml
[INFO] crate kigawas/examples-in-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 kigawas/examples-in-rust against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-0/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/kigawas/examples-in-rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+stable" "clippy" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 818da5884357f9b3151ba73e2fa1695e03a19d8da870c34f5f60c49c16390992
[INFO] running `"docker" "start" "-a" "818da5884357f9b3151ba73e2fa1695e03a19d8da870c34f5f60c49c16390992"`
[INFO] [stderr]     Checking examples-in-rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: literal with an empty format string
[INFO] [stderr]   --> src/chap1/mod.rs:34:25
[INFO] [stderr]    |
[INFO] [stderr] 34 |     println!("{} days", 31);
[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: literal with an empty format string
[INFO] [stderr]   --> src/chap1/mod.rs:41:52
[INFO] [stderr]    |
[INFO] [stderr] 41 |     println!("{0}, this is {1}. {1}, this is {0}", "Alice", "Bob");
[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: literal with an empty format string
[INFO] [stderr]   --> src/chap1/mod.rs:41:61
[INFO] [stderr]    |
[INFO] [stderr] 41 |     println!("{0}, this is {1}. {1}, this is {0}", "Alice", "Bob");
[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: literal with an empty format string
[INFO] [stderr]   --> src/chap1/mod.rs:46:18
[INFO] [stderr]    |
[INFO] [stderr] 46 |         object = "the lazy dog",
[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: literal with an empty format string
[INFO] [stderr]   --> src/chap1/mod.rs:47:19
[INFO] [stderr]    |
[INFO] [stderr] 47 |         subject = "the quick brown fox",
[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: literal with an empty format string
[INFO] [stderr]   --> src/chap1/mod.rs:48:16
[INFO] [stderr]    |
[INFO] [stderr] 48 |         verb = "jumps over"
[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: literal with an empty format string
[INFO] [stderr]   --> src/chap1/mod.rs:54:9
[INFO] [stderr]    |
[INFO] [stderr] 54 |         1, 2
[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: literal with an empty format string
[INFO] [stderr]   --> src/chap1/mod.rs:66:41
[INFO] [stderr]    |
[INFO] [stderr] 66 |     println!("My name is {0}, {1} {0}", "Bond", "James");
[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: literal with an empty format string
[INFO] [stderr]   --> src/chap1/mod.rs:66:49
[INFO] [stderr]    |
[INFO] [stderr] 66 |     println!("My name is {0}, {1} {0}", "Bond", "James");
[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: redundant field names in struct initialization
[INFO] [stderr]    --> src/chap10/mod.rs:126:25
[INFO] [stderr]     |
[INFO] [stderr] 126 |             ClosedBox { contents: contents }
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^ help: replace it with: `contents`
[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/chap16/mod.rs:43:17
[INFO] [stderr]    |
[INFO] [stderr] 43 |                 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: literal with an empty format string
[INFO] [stderr]   --> src/chap2/mod.rs:49:46
[INFO] [stderr]    |
[INFO] [stderr] 49 |     println!("One million is written as {}", 1_000_000u32);
[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/chap5/mod.rs:59:9
[INFO] [stderr]    |
[INFO] [stderr] 59 |     let f = 1.0;
[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: redundant field names in struct initialization
[INFO] [stderr]   --> src/chap9/mod.rs:56:21
[INFO] [stderr]    |
[INFO] [stderr] 56 |             Point { x: x, y: y }
[INFO] [stderr]    |                     ^^^^ help: replace it with: `x`
[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/chap9/mod.rs:56:27
[INFO] [stderr]    |
[INFO] [stderr] 56 |             Point { x: x, y: y }
[INFO] [stderr]    |                           ^^^^ help: replace it with: `y`
[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: literal with an empty format string
[INFO] [stderr]   --> src/chap1/mod.rs:34:25
[INFO] [stderr]    |
[INFO] [stderr] 34 |     println!("{} days", 31);
[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: literal with an empty format string
[INFO] [stderr]   --> src/chap1/mod.rs:41:52
[INFO] [stderr]    |
[INFO] [stderr] 41 |     println!("{0}, this is {1}. {1}, this is {0}", "Alice", "Bob");
[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: literal with an empty format string
[INFO] [stderr]   --> src/chap1/mod.rs:41:61
[INFO] [stderr]    |
[INFO] [stderr] 41 |     println!("{0}, this is {1}. {1}, this is {0}", "Alice", "Bob");
[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: literal with an empty format string
[INFO] [stderr]   --> src/chap1/mod.rs:46:18
[INFO] [stderr]    |
[INFO] [stderr] 46 |         object = "the lazy dog",
[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: literal with an empty format string
[INFO] [stderr]   --> src/chap1/mod.rs:47:19
[INFO] [stderr]    |
[INFO] [stderr] 47 |         subject = "the quick brown fox",
[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: literal with an empty format string
[INFO] [stderr]   --> src/chap1/mod.rs:48:16
[INFO] [stderr]    |
[INFO] [stderr] 48 |         verb = "jumps over"
[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: literal with an empty format string
[INFO] [stderr]   --> src/chap1/mod.rs:54:9
[INFO] [stderr]    |
[INFO] [stderr] 54 |         1, 2
[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: literal with an empty format string
[INFO] [stderr]   --> src/chap1/mod.rs:66:41
[INFO] [stderr]    |
[INFO] [stderr] 66 |     println!("My name is {0}, {1} {0}", "Bond", "James");
[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: literal with an empty format string
[INFO] [stderr]   --> src/chap1/mod.rs:66:49
[INFO] [stderr]    |
[INFO] [stderr] 66 |     println!("My name is {0}, {1} {0}", "Bond", "James");
[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: redundant field names in struct initialization
[INFO] [stderr]    --> src/chap10/mod.rs:126:25
[INFO] [stderr]     |
[INFO] [stderr] 126 |             ClosedBox { contents: contents }
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^ help: replace it with: `contents`
[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/chap16/mod.rs:43:17
[INFO] [stderr]    |
[INFO] [stderr] 43 |                 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: literal with an empty format string
[INFO] [stderr]   --> src/chap2/mod.rs:49:46
[INFO] [stderr]    |
[INFO] [stderr] 49 |     println!("One million is written as {}", 1_000_000u32);
[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/chap5/mod.rs:59:9
[INFO] [stderr]    |
[INFO] [stderr] 59 |     let f = 1.0;
[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: redundant field names in struct initialization
[INFO] [stderr]   --> src/chap9/mod.rs:56:21
[INFO] [stderr]    |
[INFO] [stderr] 56 |             Point { x: x, y: y }
[INFO] [stderr]    |                     ^^^^ help: replace it with: `x`
[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/chap9/mod.rs:56:27
[INFO] [stderr]    |
[INFO] [stderr] 56 |             Point { x: x, y: y }
[INFO] [stderr]    |                           ^^^^ help: replace it with: `y`
[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: long literal lacking separators
[INFO] [stderr]   --> src/chap1/mod.rs:78:14
[INFO] [stderr]    |
[INFO] [stderr] 78 |     let pi = 3.1415926;
[INFO] [stderr]    |              ^^^^^^^^^ help: consider: `3.141_592_6`
[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/chap1/mod.rs:288:18
[INFO] [stderr]     |
[INFO] [stderr] 288 |             lat: 53.347778,
[INFO] [stderr]     |                  ^^^^^^^^^ help: consider: `53.347_778`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]    --> src/chap1/mod.rs:289:19
[INFO] [stderr]     |
[INFO] [stderr] 289 |             lon: -6.259722,
[INFO] [stderr]     |                   ^^^^^^^^ help: consider: `6.259_722`
[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: You matched a field with a wildcard pattern. Consider using `..` instead
[INFO] [stderr]    --> src/chap15/mod.rs:289:13
[INFO] [stderr]     |
[INFO] [stderr] 289 |             y: _,
[INFO] [stderr]     |             ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::unneeded_field_pattern)] on by default
[INFO] [stderr]     = help: Try with `Point { x: ref ref_to_x, .. }`
[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/chap15/mod.rs:302:13
[INFO] [stderr]     |
[INFO] [stderr] 302 |             x: _,
[INFO] [stderr]     |             ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: Try with `Point { y: ref mut mut_ref_to_y, .. }`
[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/chap2/mod.rs:15:21
[INFO] [stderr]    |
[INFO] [stderr] 15 |     inferred_type = 4294967296i64;
[INFO] [stderr]    |                     ^^^^^^^^^^^^^ help: consider: `4_294_967_296i64`
[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: unneeded return statement
[INFO] [stderr]   --> src/chap2/mod.rs:75:13
[INFO] [stderr]    |
[INFO] [stderr] 75 |             return Matrix(self.0, self.2, self.1, self.3);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Matrix(self.0, self.2, self.1, self.3)`
[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] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]    --> src/chap3/mod.rs:195:15
[INFO] [stderr]     |
[INFO] [stderr] 195 |         Red = 0xff0000,
[INFO] [stderr]     |               ^^^^^^^^ help: consider: `0x00ff_0000`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]    --> src/chap3/mod.rs:196:17
[INFO] [stderr]     |
[INFO] [stderr] 196 |         Green = 0x00ff00,
[INFO] [stderr]     |                 ^^^^^^^^ help: consider: `0x0000_ff00`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]    --> src/chap3/mod.rs:197:16
[INFO] [stderr]     |
[INFO] [stderr] 197 |         Blue = 0x0000ff,
[INFO] [stderr]     |                ^^^^^^^^ help: consider: `0x0000_00ff`
[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: unneeded unit return type
[INFO] [stderr]   --> src/chap9/mod.rs:18:25
[INFO] [stderr]    |
[INFO] [stderr] 18 |     fn fizzbuzz(n: u32) -> () {
[INFO] [stderr]    |                         ^^^^^ help: remove the `-> ()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unused_unit)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/chap1/mod.rs:78:14
[INFO] [stderr]    |
[INFO] [stderr] 78 |     let pi = 3.1415926;
[INFO] [stderr]    |              ^^^^^^^^^ help: consider: `3.141_592_6`
[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/chap1/mod.rs:288:18
[INFO] [stderr]     |
[INFO] [stderr] 288 |             lat: 53.347778,
[INFO] [stderr]     |                  ^^^^^^^^^ help: consider: `53.347_778`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]    --> src/chap1/mod.rs:289:19
[INFO] [stderr]     |
[INFO] [stderr] 289 |             lon: -6.259722,
[INFO] [stderr]     |                   ^^^^^^^^ help: consider: `6.259_722`
[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: You matched a field with a wildcard pattern. Consider using `..` instead
[INFO] [stderr]    --> src/chap15/mod.rs:289:13
[INFO] [stderr]     |
[INFO] [stderr] 289 |             y: _,
[INFO] [stderr]     |             ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::unneeded_field_pattern)] on by default
[INFO] [stderr]     = help: Try with `Point { x: ref ref_to_x, .. }`
[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/chap15/mod.rs:302:13
[INFO] [stderr]     |
[INFO] [stderr] 302 |             x: _,
[INFO] [stderr]     |             ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: Try with `Point { y: ref mut mut_ref_to_y, .. }`
[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/chap2/mod.rs:15:21
[INFO] [stderr]    |
[INFO] [stderr] 15 |     inferred_type = 4294967296i64;
[INFO] [stderr]    |                     ^^^^^^^^^^^^^ help: consider: `4_294_967_296i64`
[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: unneeded return statement
[INFO] [stderr]   --> src/chap2/mod.rs:75:13
[INFO] [stderr]    |
[INFO] [stderr] 75 |             return Matrix(self.0, self.2, self.1, self.3);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Matrix(self.0, self.2, self.1, self.3)`
[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] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]    --> src/chap3/mod.rs:195:15
[INFO] [stderr]     |
[INFO] [stderr] 195 |         Red = 0xff0000,
[INFO] [stderr]     |               ^^^^^^^^ help: consider: `0x00ff_0000`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]    --> src/chap3/mod.rs:196:17
[INFO] [stderr]     |
[INFO] [stderr] 196 |         Green = 0x00ff00,
[INFO] [stderr]     |                 ^^^^^^^^ help: consider: `0x0000_ff00`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]    --> src/chap3/mod.rs:197:16
[INFO] [stderr]     |
[INFO] [stderr] 197 |         Blue = 0x0000ff,
[INFO] [stderr]     |                ^^^^^^^^ help: consider: `0x0000_00ff`
[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: unneeded unit return type
[INFO] [stderr]   --> src/chap9/mod.rs:18:25
[INFO] [stderr]    |
[INFO] [stderr] 18 |     fn fizzbuzz(n: u32) -> () {
[INFO] [stderr]    |                         ^^^^^ help: remove the `-> ()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unused_unit)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] error: approximate value of `f{32, 64}::consts::PI` found. Consider using it directly
[INFO] [stderr]   --> src/chap1/mod.rs:78:14
[INFO] [stderr]    |
[INFO] [stderr] 78 |     let pi = 3.1415926;
[INFO] [stderr]    |              ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[deny(clippy::approx_constant)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#approx_constant
[INFO] [stderr] 
[INFO] [stderr] warning: float has excessive precision
[INFO] [stderr]    --> src/chap1/mod.rs:288:18
[INFO] [stderr]     |
[INFO] [stderr] 288 |             lat: 53.347778,
[INFO] [stderr]     |                  ^^^^^^^^^ help: consider changing the type or truncating it to: `53.347_78`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::excessive_precision)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#excessive_precision
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/chap15/mod.rs:109:33
[INFO] [stderr]     |
[INFO] [stderr] 109 |     fn borrow_i32(borrowed_i32: &i32) {
[INFO] [stderr]     |                                 ^^^^ help: consider passing by value instead: `i32`
[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: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/chap15/mod.rs:277:9
[INFO] [stderr]     |
[INFO] [stderr] 277 |     let ref ref_c1 = c;
[INFO] [stderr]     |     ----^^^^^^^^^^----- help: try: `let ref_c1 = &c;`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::toplevel_ref_arg)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/chap15/mod.rs:358:5
[INFO] [stderr]     |
[INFO] [stderr] 358 | /     fn print_refs<'a, 'b>(x: &'a i32, y: &'b i32) {
[INFO] [stderr] 359 | |         println!("x is {} and y is {}", x, y);
[INFO] [stderr] 360 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_lifetimes)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/chap15/mod.rs:358:30
[INFO] [stderr]     |
[INFO] [stderr] 358 |     fn print_refs<'a, 'b>(x: &'a i32, y: &'b i32) {
[INFO] [stderr]     |                              ^^^^^^^ help: consider passing by value instead: `i32`
[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/chap15/mod.rs:358:42
[INFO] [stderr]     |
[INFO] [stderr] 358 |     fn print_refs<'a, 'b>(x: &'a i32, y: &'b i32) {
[INFO] [stderr]     |                                          ^^^^^^^ help: consider passing by value instead: `i32`
[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 lifetime isn't used in the function definition
[INFO] [stderr]    --> src/chap15/mod.rs:363:22
[INFO] [stderr]     |
[INFO] [stderr] 363 |     fn failed_borrow<'a>() {
[INFO] [stderr]     |                      ^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::extra_unused_lifetimes)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#extra_unused_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/chap15/mod.rs:390:5
[INFO] [stderr]     |
[INFO] [stderr] 390 | /     fn print_one<'a>(x: &'a i32) {
[INFO] [stderr] 391 | |         println!("`print_one`: x is {}", x);
[INFO] [stderr] 392 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/chap15/mod.rs:390:25
[INFO] [stderr]     |
[INFO] [stderr] 390 |     fn print_one<'a>(x: &'a i32) {
[INFO] [stderr]     |                         ^^^^^^^ help: consider passing by value instead: `i32`
[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: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/chap15/mod.rs:395:5
[INFO] [stderr]     |
[INFO] [stderr] 395 | /     fn add_one<'a>(x: &'a mut i32) {
[INFO] [stderr] 396 | |         *x += 1;
[INFO] [stderr] 397 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/chap15/mod.rs:402:5
[INFO] [stderr]     |
[INFO] [stderr] 402 | /     fn print_multi<'a, 'b>(x: &'a i32, y: &'b i32) {
[INFO] [stderr] 403 | |         println!("`print_multi`: x is {}, y is {}", x, y);
[INFO] [stderr] 404 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/chap15/mod.rs:402:31
[INFO] [stderr]     |
[INFO] [stderr] 402 |     fn print_multi<'a, 'b>(x: &'a i32, y: &'b i32) {
[INFO] [stderr]     |                               ^^^^^^^ help: consider passing by value instead: `i32`
[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/chap15/mod.rs:402:43
[INFO] [stderr]     |
[INFO] [stderr] 402 |     fn print_multi<'a, 'b>(x: &'a i32, y: &'b i32) {
[INFO] [stderr]     |                                           ^^^^^^^ help: consider passing by value instead: `i32`
[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: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/chap15/mod.rs:436:9
[INFO] [stderr]     |
[INFO] [stderr] 436 | /         fn add_one<'a>(&'a mut self) {
[INFO] [stderr] 437 | |             self.0 += 1;
[INFO] [stderr] 438 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/chap15/mod.rs:439:9
[INFO] [stderr]     |
[INFO] [stderr] 439 | /         fn print<'a>(&'a self) {
[INFO] [stderr] 440 | |             println!("`print`: {}", self.0);
[INFO] [stderr] 441 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/chap15/mod.rs:520:28
[INFO] [stderr]     |
[INFO] [stderr] 520 |     fn multiply<'a>(first: &'a i32, second: &'a i32) -> i32 {
[INFO] [stderr]     |                            ^^^^^^^ help: consider passing by value instead: `i32`
[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/chap15/mod.rs:520:45
[INFO] [stderr]     |
[INFO] [stderr] 520 |     fn multiply<'a>(first: &'a i32, second: &'a i32) -> i32 {
[INFO] [stderr]     |                                             ^^^^^^^ help: consider passing by value instead: `i32`
[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/chap15/mod.rs:526:40
[INFO] [stderr]     |
[INFO] [stderr] 526 |     fn choose_first<'a: 'b, 'b>(first: &'a i32, _: &'b i32) -> &'b i32 {
[INFO] [stderr]     |                                        ^^^^^^^ help: consider passing by value instead: `i32`
[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: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/chap15/mod.rs:545:5
[INFO] [stderr]     |
[INFO] [stderr] 545 | /     fn coerce_static<'a>(_: &'a i32) -> &'a i32 {
[INFO] [stderr] 546 | |         &NUM
[INFO] [stderr] 547 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/chap15/mod.rs:573:24
[INFO] [stderr]     |
[INFO] [stderr] 573 |     fn elided_input(x: &i32) {
[INFO] [stderr]     |                        ^^^^ help: consider passing by value instead: `i32`
[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: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/chap15/mod.rs:577:5
[INFO] [stderr]     |
[INFO] [stderr] 577 | /     fn annotated_input<'a>(x: &'a i32) {
[INFO] [stderr] 578 | |         println!("`annotated_input`: {}", x);
[INFO] [stderr] 579 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/chap15/mod.rs:577:31
[INFO] [stderr]     |
[INFO] [stderr] 577 |     fn annotated_input<'a>(x: &'a i32) {
[INFO] [stderr]     |                               ^^^^^^^ help: consider passing by value instead: `i32`
[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] error: approximate value of `f{32, 64}::consts::PI` found. Consider using it directly
[INFO] [stderr]   --> src/chap1/mod.rs:78:14
[INFO] [stderr]    |
[INFO] [stderr] 78 |     let pi = 3.1415926;
[INFO] [stderr]    |              ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[deny(clippy::approx_constant)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#approx_constant
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/chap15/mod.rs:587:5
[INFO] [stderr]     |
[INFO] [stderr] 587 | /     fn annotated_pass<'a>(x: &'a i32) -> &'a i32 {
[INFO] [stderr] 588 | |         x
[INFO] [stderr] 589 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/chap16/mod.rs:89:25
[INFO] [stderr]    |
[INFO] [stderr] 89 |             Centimeters(inches as f64 * 2.54)
[INFO] [stderr]    |                         ^^^^^^^^^^^^^ help: try: `f64::from(inches)`
[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: float has excessive precision
[INFO] [stderr]    --> src/chap1/mod.rs:288:18
[INFO] [stderr]     |
[INFO] [stderr] 288 |             lat: 53.347778,
[INFO] [stderr]     |                  ^^^^^^^^^ help: consider changing the type or truncating it to: `53.347_78`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::excessive_precision)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#excessive_precision
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/chap3/mod.rs:255:20
[INFO] [stderr]     |
[INFO] [stderr] 255 |             Nil => format!("Nil"),
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^ help: consider using .to_string(): `"Nil".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::useless_format)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: this let-binding has unit value. Consider omitting `let unit =`
[INFO] [stderr]  --> src/chap4/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     let unit = ();
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::let_unit_value)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_unit_value
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/chap15/mod.rs:109:33
[INFO] [stderr]     |
[INFO] [stderr] 109 |     fn borrow_i32(borrowed_i32: &i32) {
[INFO] [stderr]     |                                 ^^^^ help: consider passing by value instead: `i32`
[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: statement with no effect
[INFO] [stderr]  --> src/chap7/mod.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     x;
[INFO] [stderr]   |     ^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::no_effect)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#no_effect
[INFO] [stderr] 
[INFO] [stderr] warning: statement with no effect
[INFO] [stderr]   --> src/chap7/mod.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     x + 1;
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#no_effect
[INFO] [stderr] 
[INFO] [stderr] warning: statement with no effect
[INFO] [stderr]   --> src/chap7/mod.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     15;
[INFO] [stderr]    |     ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#no_effect
[INFO] [stderr] 
[INFO] [stderr] warning: this let-binding has unit value. Consider omitting `let z =`
[INFO] [stderr]   --> src/chap7/mod.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 | /     let z = {
[INFO] [stderr] 26 | |         // The semicolon suppresses this expression and `()` is assigned to `z`
[INFO] [stderr] 27 | |         2 * x;
[INFO] [stderr] 28 | |     };
[INFO] [stderr]    | |______^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_unit_value
[INFO] [stderr] 
[INFO] [stderr] warning: statement with no effect
[INFO] [stderr]   --> src/chap7/mod.rs:27:9
[INFO] [stderr]    |
[INFO] [stderr] 27 |         2 * x;
[INFO] [stderr]    |         ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#no_effect
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/chap15/mod.rs:277:9
[INFO] [stderr]     |
[INFO] [stderr] 277 |     let ref ref_c1 = c;
[INFO] [stderr]     |     ----^^^^^^^^^^----- help: try: `let ref_c1 = &c;`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::toplevel_ref_arg)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/chap15/mod.rs:358:5
[INFO] [stderr]     |
[INFO] [stderr] 358 | /     fn print_refs<'a, 'b>(x: &'a i32, y: &'b i32) {
[INFO] [stderr] 359 | |         println!("x is {} and y is {}", x, y);
[INFO] [stderr] 360 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_lifetimes)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/chap15/mod.rs:358:30
[INFO] [stderr]     |
[INFO] [stderr] 358 |     fn print_refs<'a, 'b>(x: &'a i32, y: &'b i32) {
[INFO] [stderr]     |                              ^^^^^^^ help: consider passing by value instead: `i32`
[INFO] [stderr] warning: unused label `'inner`
[INFO] [stderr]     |
[INFO] [stderr]   --> src/chap8/mod.rs:62:9
[INFO] [stderr]    |
[INFO] [stderr] 62 | /         'inner: loop {
[INFO] [stderr] 63 | |             println!("Entered the inner loop");
[INFO] [stderr] 64 | |
[INFO] [stderr] 65 | |             // This would break only the inner loop
[INFO] [stderr] ...  |
[INFO] [stderr] 69 | |             break 'outer;
[INFO] [stderr] 70 | |         }
[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/chap15/mod.rs:358:42
[INFO] [stderr]     |
[INFO] [stderr]    |
[INFO] [stderr] 358 |     fn print_refs<'a, 'b>(x: &'a i32, y: &'b i32) {
[INFO] [stderr]     |                                          ^^^^^^^ help: consider passing by value instead: `i32`
[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]    = note: #[warn(clippy::unused_label)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_label
[INFO] [stderr] 
[INFO] [stderr] error: this loop never actually loops
[INFO] [stderr]   --> src/chap8/mod.rs:62:9
[INFO] [stderr]    |
[INFO] [stderr] 62 | /         'inner: loop {
[INFO] [stderr] 63 | |             println!("Entered the inner loop");
[INFO] [stderr] 64 | |
[INFO] [stderr] 65 | |             // This would break only the inner loop
[INFO] [stderr] ...  |
[INFO] [stderr] 69 | |             break 'outer;
[INFO] [stderr] 70 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[deny(clippy::never_loop)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#never_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this lifetime isn't used in the function definition
[INFO] [stderr]    --> src/chap15/mod.rs:363:22
[INFO] [stderr]     |
[INFO] [stderr] 363 |     fn failed_borrow<'a>() {
[INFO] [stderr]     |                      ^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::extra_unused_lifetimes)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#extra_unused_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/chap15/mod.rs:390:5
[INFO] [stderr]     |
[INFO] [stderr] 390 | /     fn print_one<'a>(x: &'a i32) {
[INFO] [stderr] 391 | |         println!("`print_one`: x is {}", x);
[INFO] [stderr] 392 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/chap15/mod.rs:390:25
[INFO] [stderr]     |
[INFO] [stderr] 390 |     fn print_one<'a>(x: &'a i32) {
[INFO] [stderr]     |                         ^^^^^^^ help: consider passing by value instead: `i32`
[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: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/chap15/mod.rs:395:5
[INFO] [stderr]     |
[INFO] [stderr] 395 | /     fn add_one<'a>(x: &'a mut i32) {
[INFO] [stderr] 396 | |         *x += 1;
[INFO] [stderr] 397 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/chap15/mod.rs:402:5
[INFO] [stderr]     |
[INFO] [stderr] 402 | /     fn print_multi<'a, 'b>(x: &'a i32, y: &'b i32) {
[INFO] [stderr] 403 | |         println!("`print_multi`: x is {}, y is {}", x, y);
[INFO] [stderr] 404 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/chap15/mod.rs:402:31
[INFO] [stderr]     |
[INFO] [stderr] 402 |     fn print_multi<'a, 'b>(x: &'a i32, y: &'b i32) {
[INFO] [stderr]     |                               ^^^^^^^ help: consider passing by value instead: `i32`
[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/chap15/mod.rs:402:43
[INFO] [stderr]     |
[INFO] [stderr] 402 |     fn print_multi<'a, 'b>(x: &'a i32, y: &'b i32) {
[INFO] [stderr]     |                                           ^^^^^^^ help: consider passing by value instead: `i32`
[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: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/chap15/mod.rs:436:9
[INFO] [stderr]     |
[INFO] [stderr] 436 | /         fn add_one<'a>(&'a mut self) {
[INFO] [stderr] 437 | |             self.0 += 1;
[INFO] [stderr] 438 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/chap15/mod.rs:439:9
[INFO] [stderr]     |
[INFO] [stderr] 439 | /         fn print<'a>(&'a self) {
[INFO] [stderr] 440 | |             println!("`print`: {}", self.0);
[INFO] [stderr] 441 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/chap8/mod.rs:145:9
[INFO] [stderr]     |
[INFO] [stderr] 145 | /         match name {
[INFO] [stderr] 146 | |             &"Ferris" => println!("There is a rustacean among us!"),
[INFO] [stderr] 147 | |             _ => println!("Hello {}", name),
[INFO] [stderr] 148 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::match_ref_pats)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 145 |         match *name {
[INFO] [stderr] 146 |             "Ferris" => println!("There is a rustacean among us!"),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/chap8/mod.rs:165:9
[INFO] [stderr]     |
[INFO] [stderr] 165 | /         match name {
[INFO] [stderr] 166 | |             &mut "Ferris" => {
[INFO] [stderr] 167 | |                 println!("There is a rustacean among us!");
[INFO] [stderr] 168 | |             }
[INFO] [stderr] 169 | |             _ => println!("Hello {}", name),
[INFO] [stderr] 170 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 165 |         match *name {
[INFO] [stderr] 166 |             "Ferris" => {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to match on a boolean expression
[INFO] [stderr]    --> src/chap8/mod.rs:192:18
[INFO] [stderr]     |
[INFO] [stderr] 192 |       let binary = match boolean {
[INFO] [stderr]     |  __________________^
[INFO] [stderr] 193 | |         // The arms of a match must cover all the possible values
[INFO] [stderr] 194 | |         false => 0,
[INFO] [stderr] 195 | |         true => 1,
[INFO] [stderr] 196 | |         // TODO ^ Try commenting out one of these arms
[INFO] [stderr] 197 | |     };
[INFO] [stderr]     | |_____^ help: consider using an if/else expression: `if boolean { 1 } else { 0 }`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::match_bool)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/chap15/mod.rs:520:28
[INFO] [stderr]     |
[INFO] [stderr] 520 |     fn multiply<'a>(first: &'a i32, second: &'a i32) -> i32 {
[INFO] [stderr]     |                            ^^^^^^^ help: consider passing by value instead: `i32`
[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/chap15/mod.rs:520:45
[INFO] [stderr]     |
[INFO] [stderr] 520 |     fn multiply<'a>(first: &'a i32, second: &'a i32) -> i32 {
[INFO] [stderr]     |                                             ^^^^^^^ help: consider passing by value instead: `i32`
[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/chap15/mod.rs:526:40
[INFO] [stderr]     |
[INFO] [stderr] 526 |     fn choose_first<'a: 'b, 'b>(first: &'a i32, _: &'b i32) -> &'b i32 {
[INFO] [stderr]     |                                        ^^^^^^^ help: consider passing by value instead: `i32`
[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: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/chap15/mod.rs:545:5
[INFO] [stderr]     |
[INFO] [stderr] 545 | /     fn coerce_static<'a>(_: &'a i32) -> &'a i32 {
[INFO] [stderr] 546 | |         &NUM
[INFO] [stderr] 547 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/chap15/mod.rs:573:24
[INFO] [stderr]     |
[INFO] [stderr] 573 |     fn elided_input(x: &i32) {
[INFO] [stderr]     |                        ^^^^ help: consider passing by value instead: `i32`
[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: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/chap15/mod.rs:577:5
[INFO] [stderr]     |
[INFO] [stderr] 577 | /     fn annotated_input<'a>(x: &'a i32) {
[INFO] [stderr] 578 | |         println!("`annotated_input`: {}", x);
[INFO] [stderr] 579 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/chap15/mod.rs:577:31
[INFO] [stderr]     |
[INFO] [stderr] 577 |     fn annotated_input<'a>(x: &'a i32) {
[INFO] [stderr]     |                               ^^^^^^^ help: consider passing by value instead: `i32`
[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: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/chap15/mod.rs:587:5
[INFO] [stderr]     |
[INFO] [stderr] 587 | /     fn annotated_pass<'a>(x: &'a i32) -> &'a i32 {
[INFO] [stderr] 588 | |         x
[INFO] [stderr] 589 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/chap8/mod.rs:259:5
[INFO] [stderr]     |
[INFO] [stderr] 259 | /     match reference {
[INFO] [stderr] 260 | |         // If `reference`s is pattern matched against `&val`, it results
[INFO] [stderr] 261 | |         // in a comparison like:
[INFO] [stderr] 262 | |         // `&i32`
[INFO] [stderr] ...   |
[INFO] [stderr] 266 | |         &val => println!("Got a value via destructuring: {:?}", val),
[INFO] [stderr] 267 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 259 |     match *reference {
[INFO] [stderr] 260 |         // If `reference`s is pattern matched against `&val`, it results
[INFO] [stderr] 261 |         // in a comparison like:
[INFO] [stderr] 262 |         // `&i32`
[INFO] [stderr] 263 |         // `&val`
[INFO] [stderr] 264 |         // ^ We see that if the matching `&`s are dropped, then the `i32`
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/chap8/mod.rs:282:9
[INFO] [stderr]     |
[INFO] [stderr] 282 |     let ref _is_a_reference = 3;
[INFO] [stderr]     |     ----^^^^^^^^^^^^^^^^^^^----- help: try: `let _is_a_reference = &3;`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: use of a blacklisted/placeholder name `foo`
[INFO] [stderr]    --> src/chap8/mod.rs:316:9
[INFO] [stderr]     |
[INFO] [stderr] 316 |     let foo = Foo { x: (1, 2), y: 3 };
[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: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/chap16/mod.rs:89:25
[INFO] [stderr]    |
[INFO] [stderr] 89 |             Centimeters(inches as f64 * 2.54)
[INFO] [stderr]    |                         ^^^^^^^^^^^^^ help: try: `f64::from(inches)`
[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: an inclusive range would be more readable
[INFO] [stderr]   --> src/chap9/mod.rs:33:18
[INFO] [stderr]    |
[INFO] [stderr] 33 |         for n in 1..n + 1 {
[INFO] [stderr]    |                  ^^^^^^^^ help: use: `1..=n`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::range_plus_one)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/chap3/mod.rs:255:20
[INFO] [stderr]     |
[INFO] [stderr] 255 |             Nil => format!("Nil"),
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^ help: consider using .to_string(): `"Nil".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::useless_format)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `examples-in-rust`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: this let-binding has unit value. Consider omitting `let unit =`
[INFO] [stderr]  --> src/chap4/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     let unit = ();
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::let_unit_value)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_unit_value
[INFO] [stderr] 
[INFO] [stderr] warning: statement with no effect
[INFO] [stderr]  --> src/chap7/mod.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     x;
[INFO] [stderr]   |     ^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::no_effect)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#no_effect
[INFO] [stderr] 
[INFO] [stderr] warning: statement with no effect
[INFO] [stderr]   --> src/chap7/mod.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     x + 1;
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#no_effect
[INFO] [stderr] 
[INFO] [stderr] warning: statement with no effect
[INFO] [stderr]   --> src/chap7/mod.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     15;
[INFO] [stderr]    |     ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#no_effect
[INFO] [stderr] 
[INFO] [stderr] warning: this let-binding has unit value. Consider omitting `let z =`
[INFO] [stderr]   --> src/chap7/mod.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 | /     let z = {
[INFO] [stderr] 26 | |         // The semicolon suppresses this expression and `()` is assigned to `z`
[INFO] [stderr] 27 | |         2 * x;
[INFO] [stderr] 28 | |     };
[INFO] [stderr]    | |______^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_unit_value
[INFO] [stderr] 
[INFO] [stderr] warning: statement with no effect
[INFO] [stderr]   --> src/chap7/mod.rs:27:9
[INFO] [stderr]    |
[INFO] [stderr] 27 |         2 * x;
[INFO] [stderr]    |         ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#no_effect
[INFO] [stderr] 
[INFO] [stderr] warning: unused label `'inner`
[INFO] [stderr]   --> src/chap8/mod.rs:62:9
[INFO] [stderr]    |
[INFO] [stderr] 62 | /         'inner: loop {
[INFO] [stderr] 63 | |             println!("Entered the inner loop");
[INFO] [stderr] 64 | |
[INFO] [stderr] 65 | |             // This would break only the inner loop
[INFO] [stderr] ...  |
[INFO] [stderr] 69 | |             break 'outer;
[INFO] [stderr] 70 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unused_label)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_label
[INFO] [stderr] 
[INFO] [stderr] error: this loop never actually loops
[INFO] [stderr]   --> src/chap8/mod.rs:62:9
[INFO] [stderr]    |
[INFO] [stderr] 62 | /         'inner: loop {
[INFO] [stderr] 63 | |             println!("Entered the inner loop");
[INFO] [stderr] 64 | |
[INFO] [stderr] 65 | |             // This would break only the inner loop
[INFO] [stderr] ...  |
[INFO] [stderr] 69 | |             break 'outer;
[INFO] [stderr] 70 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[deny(clippy::never_loop)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#never_loop
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/chap8/mod.rs:145:9
[INFO] [stderr]     |
[INFO] [stderr] 145 | /         match name {
[INFO] [stderr] 146 | |             &"Ferris" => println!("There is a rustacean among us!"),
[INFO] [stderr] 147 | |             _ => println!("Hello {}", name),
[INFO] [stderr] 148 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::match_ref_pats)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 145 |         match *name {
[INFO] [stderr] 146 |             "Ferris" => println!("There is a rustacean among us!"),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/chap8/mod.rs:165:9
[INFO] [stderr]     |
[INFO] [stderr] 165 | /         match name {
[INFO] [stderr] 166 | |             &mut "Ferris" => {
[INFO] [stderr] 167 | |                 println!("There is a rustacean among us!");
[INFO] [stderr] 168 | |             }
[INFO] [stderr] 169 | |             _ => println!("Hello {}", name),
[INFO] [stderr] 170 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 165 |         match *name {
[INFO] [stderr] 166 |             "Ferris" => {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to match on a boolean expression
[INFO] [stderr]    --> src/chap8/mod.rs:192:18
[INFO] [stderr]     |
[INFO] [stderr] 192 |       let binary = match boolean {
[INFO] [stderr]     |  __________________^
[INFO] [stderr] 193 | |         // The arms of a match must cover all the possible values
[INFO] [stderr] 194 | |         false => 0,
[INFO] [stderr] 195 | |         true => 1,
[INFO] [stderr] 196 | |         // TODO ^ Try commenting out one of these arms
[INFO] [stderr] 197 | |     };
[INFO] [stderr]     | |_____^ help: consider using an if/else expression: `if boolean { 1 } else { 0 }`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::match_bool)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/chap8/mod.rs:259:5
[INFO] [stderr]     |
[INFO] [stderr] 259 | /     match reference {
[INFO] [stderr] 260 | |         // If `reference`s is pattern matched against `&val`, it results
[INFO] [stderr] 261 | |         // in a comparison like:
[INFO] [stderr] 262 | |         // `&i32`
[INFO] [stderr] ...   |
[INFO] [stderr] 266 | |         &val => println!("Got a value via destructuring: {:?}", val),
[INFO] [stderr] 267 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 259 |     match *reference {
[INFO] [stderr] 260 |         // If `reference`s is pattern matched against `&val`, it results
[INFO] [stderr] 261 |         // in a comparison like:
[INFO] [stderr] 262 |         // `&i32`
[INFO] [stderr] 263 |         // `&val`
[INFO] [stderr] 264 |         // ^ We see that if the matching `&`s are dropped, then the `i32`
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/chap8/mod.rs:282:9
[INFO] [stderr]     |
[INFO] [stderr] 282 |     let ref _is_a_reference = 3;
[INFO] [stderr]     |     ----^^^^^^^^^^^^^^^^^^^----- help: try: `let _is_a_reference = &3;`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: use of a blacklisted/placeholder name `foo`
[INFO] [stderr]    --> src/chap8/mod.rs:316:9
[INFO] [stderr]     |
[INFO] [stderr] 316 |     let foo = Foo { x: (1, 2), y: 3 };
[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: an inclusive range would be more readable
[INFO] [stderr]   --> src/chap9/mod.rs:33:18
[INFO] [stderr]    |
[INFO] [stderr] 33 |         for n in 1..n + 1 {
[INFO] [stderr]    |                  ^^^^^^^^ help: use: `1..=n`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::range_plus_one)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `examples-in-rust`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "818da5884357f9b3151ba73e2fa1695e03a19d8da870c34f5f60c49c16390992"`
[INFO] running `"docker" "rm" "-f" "818da5884357f9b3151ba73e2fa1695e03a19d8da870c34f5f60c49c16390992"`
[INFO] [stdout] 818da5884357f9b3151ba73e2fa1695e03a19d8da870c34f5f60c49c16390992