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[INFO] [stderr] done. 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[INFO] running `Command { std: "docker" "start" "-a" "d94601bc76bfde448697340a63ff41e53005205862caa3a7c8e005f9c4a69b73", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "d94601bc76bfde448697340a63ff41e53005205862caa3a7c8e005f9c4a69b73", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "d94601bc76bfde448697340a63ff41e53005205862caa3a7c8e005f9c4a69b73", kill_on_drop: false }` [INFO] [stdout] d94601bc76bfde448697340a63ff41e53005205862caa3a7c8e005f9c4a69b73 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 6dfa51d1244130f924ecac616f89f25fb45c7ae1a98f3be0e742a6378403b713 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. 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[stderr] Checking language v0.1.0 (/opt/rustwide/workdir/language) [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> language/src/bin/file-io.rs:22:9 [INFO] [stdout] | [INFO] [stdout] 22 | let f = File::open("hello.txt").unwrap_or_else(|error| { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `read_lines` [INFO] [stdout] --> language/src/bin/file-io.rs:15:4 [INFO] [stdout] | [INFO] [stdout] 15 | fn read_lines

(filename: P) -> io::Result>> [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `open_file` [INFO] [stdout] --> language/src/bin/file-io.rs:21:4 [INFO] [stdout] | [INFO] [stdout] 21 | fn open_file() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `read_from_file_to_string_v1` [INFO] [stdout] --> language/src/bin/file-io.rs:33:4 [INFO] [stdout] | [INFO] [stdout] 33 | fn read_from_file_to_string_v1() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `read_from_file_to_string_v2` [INFO] [stdout] --> language/src/bin/file-io.rs:40:4 [INFO] [stdout] | [INFO] [stdout] 40 | fn read_from_file_to_string_v2() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `read_from_file_to_string_v3` [INFO] [stdout] --> language/src/bin/file-io.rs:48:4 [INFO] [stdout] | [INFO] [stdout] 48 | fn read_from_file_to_string_v3(path: &str) -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `print_dir_names` [INFO] [stdout] --> language/src/bin/file-io.rs:52:4 [INFO] [stdout] | [INFO] [stdout] 52 | fn print_dir_names(p: &str) { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `ptr` [INFO] [stdout] --> language/src/bin/iterators.rs:67:9 [INFO] [stdout] | [INFO] [stdout] 67 | let ptr = &hello[0..3]; [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_ptr` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `four` [INFO] [stdout] --> language/src/bin/iterators.rs:73:9 [INFO] [stdout] | [INFO] [stdout] 73 | let four = "4".parse::(); // using turbofish [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_four` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s2` [INFO] [stdout] --> language/src/bin/iterators.rs:77:9 [INFO] [stdout] | [INFO] [stdout] 77 | let s2: String = String::from("'String' is a growable, mutable, owned, UTF-8 encoded string type"); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 7 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `iter_ex` [INFO] [stdout] --> language/src/bin/iterators.rs:11:4 [INFO] [stdout] | [INFO] [stdout] 11 | fn iter_ex() { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `into_iter_ex` [INFO] [stdout] --> language/src/bin/iterators.rs:37:4 [INFO] [stdout] | [INFO] [stdout] 37 | fn into_iter_ex() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `iter_mut_ex` [INFO] [stdout] --> language/src/bin/iterators.rs:50:4 [INFO] [stdout] | [INFO] [stdout] 50 | fn iter_mut_ex() { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `push98` [INFO] [stdout] --> language/src/bin/borrows.rs:47:4 [INFO] [stdout] | [INFO] [stdout] 47 | fn push98(v: &mut Vec) { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `has_odd` [INFO] [stdout] --> language/src/bin/borrows.rs:51:4 [INFO] [stdout] | [INFO] [stdout] 51 | fn has_odd(v: &Vec) -> bool { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `...` range patterns are deprecated [INFO] [stdout] --> language/src/bin/pattern-matching.rs:73:11 [INFO] [stdout] | [INFO] [stdout] 73 | 1 ... 5 => println!("one through five"), [INFO] [stdout] | ^^^ help: use `..=` for an inclusive range [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `...` range patterns are deprecated [INFO] [stdout] --> language/src/bin/pattern-matching.rs:82:13 [INFO] [stdout] | [INFO] [stdout] 82 | 'a' ... 'j' => println!("early ASCII letter"), [INFO] [stdout] | ^^^ help: use `..=` for an inclusive range [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `...` range patterns are deprecated [INFO] [stdout] --> language/src/bin/pattern-matching.rs:83:13 [INFO] [stdout] | [INFO] [stdout] 83 | 'k' ... 'z' => println!("late ASCII letter"), [INFO] [stdout] | ^^^ help: use `..=` for an inclusive range [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `...` range patterns are deprecated [INFO] [stdout] --> language/src/bin/pattern-matching.rs:143:45 [INFO] [stdout] | [INFO] [stdout] 143 | Message::Hello { id: id_variable @ 3...7 } => { [INFO] [stdout] | ^^^ help: use `..=` for an inclusive range [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `...` range patterns are deprecated [INFO] [stdout] --> language/src/bin/pattern-matching.rs:146:32 [INFO] [stdout] | [INFO] [stdout] 146 | Message::Hello { id: 10...12 } => { [INFO] [stdout] | ^^^ help: use `..=` for an inclusive range [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v2` [INFO] [stdout] --> language/src/bin/slices.rs:7:13 [INFO] [stdout] | [INFO] [stdout] 7 | let mut v2 = vec![2, 4, 6, 8]; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_v2` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r` [INFO] [stdout] --> language/src/bin/slices.rs:15:13 [INFO] [stdout] | [INFO] [stdout] 15 | let (l, r) = slice.split_at_mut(mid); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_r` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> language/src/bin/slices.rs:7:9 [INFO] [stdout] | [INFO] [stdout] 7 | let mut v2 = vec![2, 4, 6, 8]; [INFO] [stdout] | ----^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `feet` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:212:11 [INFO] [stdout] | [INFO] [stdout] 212 | let ((feet, inches), Point {x, y}) = ((3, 10), Point { x: 3, y: -10 }); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_feet` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `inches` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:212:17 [INFO] [stdout] | [INFO] [stdout] 212 | let ((feet, inches), Point {x, y}) = ((3, 10), Point { x: 3, y: -10 }); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_inches` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:212:33 [INFO] [stdout] | [INFO] [stdout] 212 | let ((feet, inches), Point {x, y}) = ((3, 10), Point { x: 3, y: -10 }); [INFO] [stdout] | ^ help: try ignoring the field: `x: _` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:212:36 [INFO] [stdout] | [INFO] [stdout] 212 | let ((feet, inches), Point {x, y}) = ((3, 10), Point { x: 3, y: -10 }); [INFO] [stdout] | ^ help: try ignoring the field: `y: _` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum is never used: `Color` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:3:6 [INFO] [stdout] | [INFO] [stdout] 3 | enum Color { [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum is never used: `Message` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:8:6 [INFO] [stdout] | [INFO] [stdout] 8 | enum Message { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `y` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:22:5 [INFO] [stdout] | [INFO] [stdout] 22 | y: i32, [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `z` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:23:5 [INFO] [stdout] | [INFO] [stdout] 23 | z: i32 [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `if_let_examples` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:27:4 [INFO] [stdout] | [INFO] [stdout] 27 | fn if_let_examples() { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `while_let_examples` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:48:4 [INFO] [stdout] | [INFO] [stdout] 48 | fn while_let_examples() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `multiple_patterns` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:60:4 [INFO] [stdout] | [INFO] [stdout] 60 | fn multiple_patterns() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `range_patterns` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:69:4 [INFO] [stdout] | [INFO] [stdout] 69 | fn range_patterns() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `char_range_patterns` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:78:4 [INFO] [stdout] | [INFO] [stdout] 78 | fn char_range_patterns() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `matching_structs` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:88:4 [INFO] [stdout] | [INFO] [stdout] 88 | fn matching_structs() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `nested_structs_and_enums` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:98:4 [INFO] [stdout] | [INFO] [stdout] 98 | fn nested_structs_and_enums() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `match_guard_examples` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:122:4 [INFO] [stdout] | [INFO] [stdout] 122 | fn match_guard_examples() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `bindings_example` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:136:4 [INFO] [stdout] | [INFO] [stdout] 136 | fn bindings_example() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `matches_macro` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:182:4 [INFO] [stdout] | [INFO] [stdout] 182 | fn matches_macro() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 23 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `i` is assigned to, but never used [INFO] [stdout] --> language/src/bin/strings.rs:38:13 [INFO] [stdout] | [INFO] [stdout] 38 | let mut i: usize = 0; [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] = note: consider using `_i` instead [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `push98` [INFO] [stdout] --> language/src/bin/borrows.rs:47:4 [INFO] [stdout] | [INFO] [stdout] 47 | fn push98(v: &mut Vec) { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `has_odd` [INFO] [stdout] --> language/src/bin/borrows.rs:51:4 [INFO] [stdout] | [INFO] [stdout] 51 | fn has_odd(v: &Vec) -> bool { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `...` range patterns are deprecated [INFO] [stdout] --> language/src/bin/pattern-matching.rs:73:11 [INFO] [stdout] | [INFO] [stdout] 73 | 1 ... 5 => println!("one through five"), [INFO] [stdout] | ^^^ help: use `..=` for an inclusive range [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `...` range patterns are deprecated [INFO] [stdout] --> language/src/bin/pattern-matching.rs:82:13 [INFO] [stdout] | [INFO] [stdout] 82 | 'a' ... 'j' => println!("early ASCII letter"), [INFO] [stdout] | ^^^ help: use `..=` for an inclusive range [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `...` range patterns are deprecated [INFO] [stdout] --> language/src/bin/pattern-matching.rs:83:13 [INFO] [stdout] | [INFO] [stdout] 83 | 'k' ... 'z' => println!("late ASCII letter"), [INFO] [stdout] | ^^^ help: use `..=` for an inclusive range [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `...` range patterns are deprecated [INFO] [stdout] --> language/src/bin/pattern-matching.rs:143:45 [INFO] [stdout] | [INFO] [stdout] 143 | Message::Hello { id: id_variable @ 3...7 } => { [INFO] [stdout] | ^^^ help: use `..=` for an inclusive range [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `...` range patterns are deprecated [INFO] [stdout] --> language/src/bin/pattern-matching.rs:146:32 [INFO] [stdout] | [INFO] [stdout] 146 | Message::Hello { id: 10...12 } => { [INFO] [stdout] | ^^^ help: use `..=` for an inclusive range [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> language/src/bin/lifetimes.rs:53:37 [INFO] [stdout] | [INFO] [stdout] 53 | fn longest_always_x<'a>(x: &'a str, y: &str) -> &'a str { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `longest` [INFO] [stdout] --> language/src/bin/lifetimes.rs:42:4 [INFO] [stdout] | [INFO] [stdout] 42 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `longest_with_an_announcement` [INFO] [stdout] --> language/src/bin/lifetimes.rs:57:4 [INFO] [stdout] | [INFO] [stdout] 57 | fn longest_with_an_announcement<'a, T>(x: &'a str, y: &'a str, ann: T) -> &'a str [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct is never constructed: `S` [INFO] [stdout] --> language/src/bin/generic-impl-ex.rs:1:8 [INFO] [stdout] | [INFO] [stdout] 1 | struct S; // Concrete type `S` [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `feet` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:212:11 [INFO] [stdout] | [INFO] [stdout] 212 | let ((feet, inches), Point {x, y}) = ((3, 10), Point { x: 3, y: -10 }); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_feet` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `inches` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:212:17 [INFO] [stdout] | [INFO] [stdout] 212 | let ((feet, inches), Point {x, y}) = ((3, 10), Point { x: 3, y: -10 }); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_inches` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:212:33 [INFO] [stdout] | [INFO] [stdout] 212 | let ((feet, inches), Point {x, y}) = ((3, 10), Point { x: 3, y: -10 }); [INFO] [stdout] | ^ help: try ignoring the field: `x: _` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:212:36 [INFO] [stdout] | [INFO] [stdout] 212 | let ((feet, inches), Point {x, y}) = ((3, 10), Point { x: 3, y: -10 }); [INFO] [stdout] | ^ help: try ignoring the field: `y: _` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum is never used: `Color` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:3:6 [INFO] [stdout] | [INFO] [stdout] 3 | enum Color { [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum is never used: `Message` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:8:6 [INFO] [stdout] | [INFO] [stdout] 8 | enum Message { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `y` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:22:5 [INFO] [stdout] | [INFO] [stdout] 22 | y: i32, [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `z` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:23:5 [INFO] [stdout] | [INFO] [stdout] 23 | z: i32 [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `if_let_examples` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:27:4 [INFO] [stdout] | [INFO] [stdout] 27 | fn if_let_examples() { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `while_let_examples` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:48:4 [INFO] [stdout] | [INFO] [stdout] 48 | fn while_let_examples() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `multiple_patterns` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:60:4 [INFO] [stdout] | [INFO] [stdout] 60 | fn multiple_patterns() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `range_patterns` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:69:4 [INFO] [stdout] | [INFO] [stdout] 69 | fn range_patterns() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `char_range_patterns` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:78:4 [INFO] [stdout] | [INFO] [stdout] 78 | fn char_range_patterns() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `matching_structs` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:88:4 [INFO] [stdout] | [INFO] [stdout] 88 | fn matching_structs() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `nested_structs_and_enums` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:98:4 [INFO] [stdout] | [INFO] [stdout] 98 | fn nested_structs_and_enums() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `match_guard_examples` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:122:4 [INFO] [stdout] | [INFO] [stdout] 122 | fn match_guard_examples() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `bindings_example` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:136:4 [INFO] [stdout] | [INFO] [stdout] 136 | fn bindings_example() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `matches_macro` [INFO] [stdout] --> language/src/bin/pattern-matching.rs:182:4 [INFO] [stdout] | [INFO] [stdout] 182 | fn matches_macro() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 23 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `body` [INFO] [stdout] --> language/src/bin/async-await.rs:191:20 [INFO] [stdout] | [INFO] [stdout] 191 | Ok(body) => { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_body` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `body` [INFO] [stdout] --> language/src/bin/async-await.rs:191:20 [INFO] [stdout] | [INFO] [stdout] 191 | Ok(body) => { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_body` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `demo_waiting_for_two_async_fns` [INFO] [stdout] --> language/src/bin/async-await.rs:17:4 [INFO] [stdout] | [INFO] [stdout] 17 | fn demo_waiting_for_two_async_fns() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `call_both_sleepers` [INFO] [stdout] --> language/src/bin/async-await.rs:24:10 [INFO] [stdout] | [INFO] [stdout] 24 | async fn call_both_sleepers() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `first_sleeper` [INFO] [stdout] --> language/src/bin/async-await.rs:28:10 [INFO] [stdout] | [INFO] [stdout] 28 | async fn first_sleeper() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `second_sleeper` [INFO] [stdout] --> language/src/bin/async-await.rs:32:10 [INFO] [stdout] | [INFO] [stdout] 32 | async fn second_sleeper() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `sleep_and_print` [INFO] [stdout] --> language/src/bin/async-await.rs:38:10 [INFO] [stdout] | [INFO] [stdout] 38 | async fn sleep_and_print(future_number: u32, sleep_millis: u64) { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `demo_waiting_for_multiple_random_sleeps` [INFO] [stdout] --> language/src/bin/async-await.rs:46:4 [INFO] [stdout] | [INFO] [stdout] 46 | fn demo_waiting_for_multiple_random_sleeps() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `sleep_and_print_and_return_value` [INFO] [stdout] --> language/src/bin/async-await.rs:76:10 [INFO] [stdout] | [INFO] [stdout] 76 | async fn sleep_and_print_and_return_value(future_number: u32, sleep_millis: u64) -> u32 { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `demo_waiting_for_multiple_random_sleeps_with_return_values` [INFO] [stdout] --> language/src/bin/async-await.rs:84:4 [INFO] [stdout] | [INFO] [stdout] 84 | fn demo_waiting_for_multiple_random_sleeps_with_return_values() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `download_url` [INFO] [stdout] --> language/src/bin/async-await.rs:146:10 [INFO] [stdout] | [INFO] [stdout] 146 | async fn download_url(url: &str) -> Result { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `demo_downloading_urls` [INFO] [stdout] --> language/src/bin/async-await.rs:157:4 [INFO] [stdout] | [INFO] [stdout] 157 | fn demo_downloading_urls() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `demo_waiting_for_two_async_fns` [INFO] [stdout] --> language/src/bin/async-await.rs:17:4 [INFO] [stdout] | [INFO] [stdout] 17 | fn demo_waiting_for_two_async_fns() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `call_both_sleepers` [INFO] [stdout] --> language/src/bin/async-await.rs:24:10 [INFO] [stdout] | [INFO] [stdout] 24 | async fn call_both_sleepers() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `first_sleeper` [INFO] [stdout] --> language/src/bin/async-await.rs:28:10 [INFO] [stdout] | [INFO] [stdout] 28 | async fn first_sleeper() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `second_sleeper` [INFO] [stdout] --> language/src/bin/async-await.rs:32:10 [INFO] [stdout] | [INFO] [stdout] 32 | async fn second_sleeper() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `sleep_and_print` [INFO] [stdout] --> language/src/bin/async-await.rs:38:10 [INFO] [stdout] | [INFO] [stdout] 38 | async fn sleep_and_print(future_number: u32, sleep_millis: u64) { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `demo_waiting_for_multiple_random_sleeps` [INFO] [stdout] --> language/src/bin/async-await.rs:46:4 [INFO] [stdout] | [INFO] [stdout] 46 | fn demo_waiting_for_multiple_random_sleeps() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `sleep_and_print_and_return_value` [INFO] [stdout] --> language/src/bin/async-await.rs:76:10 [INFO] [stdout] | [INFO] [stdout] 76 | async fn sleep_and_print_and_return_value(future_number: u32, sleep_millis: u64) -> u32 { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `demo_waiting_for_multiple_random_sleeps_with_return_values` [INFO] [stdout] --> language/src/bin/async-await.rs:84:4 [INFO] [stdout] | [INFO] [stdout] 84 | fn demo_waiting_for_multiple_random_sleeps_with_return_values() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `download_url` [INFO] [stdout] --> language/src/bin/async-await.rs:146:10 [INFO] [stdout] | [INFO] [stdout] 146 | async fn download_url(url: &str) -> Result { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `demo_downloading_urls` [INFO] [stdout] --> language/src/bin/async-await.rs:157:4 [INFO] [stdout] | [INFO] [stdout] 157 | fn demo_downloading_urls() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> language/src/bin/fibonacci.rs:32:9 [INFO] [stdout] | [INFO] [stdout] 32 | let f = Fib::new(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Cell` [INFO] [stdout] --> language/src/bin/smart-pointers.rs:1:17 [INFO] [stdout] | [INFO] [stdout] 1 | use std::cell::{Cell, RefCell}; [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 11 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 11 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> language/src/bin/trait-objects.rs:50:21 [INFO] [stdout] | [INFO] [stdout] 50 | let ducks: Vec<&Quack> = vec![&duck1,&duck2,&parrot]; [INFO] [stdout] | ^^^^^ help: use `dyn`: `dyn Quack` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: constant is never used: `MAX_THREADS` [INFO] [stdout] --> language/src/bin/threads-map-reduce.rs:8:5 [INFO] [stdout] | [INFO] [stdout] 8 | const MAX_THREADS: usize = 8; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `black` [INFO] [stdout] --> language/src/bin/structs.rs:50:9 [INFO] [stdout] | [INFO] [stdout] 50 | let black = Color(0, 0, 0); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_black` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `origin` [INFO] [stdout] --> language/src/bin/structs.rs:51:9 [INFO] [stdout] | [INFO] [stdout] 51 | let origin = Point(0, 0, 0); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_origin` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `area` [INFO] [stdout] --> language/src/bin/structs.rs:10:8 [INFO] [stdout] | [INFO] [stdout] 10 | fn area(&self) -> u32 { [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `marea` [INFO] [stdout] --> language/src/bin/structs.rs:14:8 [INFO] [stdout] | [INFO] [stdout] 14 | fn marea(&mut self) -> u32 { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct is never constructed: `S` [INFO] [stdout] --> language/src/bin/generic-impl-ex.rs:1:8 [INFO] [stdout] | [INFO] [stdout] 1 | struct S; // Concrete type `S` [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `root` [INFO] [stdout] --> language/src/bin/smart-pointers.rs:75:13 [INFO] [stdout] | [INFO] [stdout] 75 | let mut root = Tree { root: Some(rc0.clone()), len: 0 }; [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_root` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `elem` [INFO] [stdout] --> language/src/bin/smart-pointers.rs:67:26 [INFO] [stdout] | [INFO] [stdout] 67 | fn insert(&mut self, elem: T) { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_elem` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> language/src/bin/smart-pointers.rs:73:9 [INFO] [stdout] | [INFO] [stdout] 73 | let mut rn = Node { elem:50, color: Color::Black, parent: None, left: None, right: None}; [INFO] [stdout] | ----^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `pos` is never read [INFO] [stdout] --> language/src/bin/ranges.rs:9:13 [INFO] [stdout] | [INFO] [stdout] 9 | let mut pos: usize = 0; [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_assignments)]` on by default [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> language/src/bin/smart-pointers.rs:75:9 [INFO] [stdout] | [INFO] [stdout] 75 | let mut root = Tree { root: Some(rc0.clone()), len: 0 }; [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `root` [INFO] [stdout] --> language/src/bin/smart-pointers.rs:26:5 [INFO] [stdout] | [INFO] [stdout] 26 | root: Link, [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `len` [INFO] [stdout] --> language/src/bin/smart-pointers.rs:27:5 [INFO] [stdout] | [INFO] [stdout] 27 | len: usize, [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `append` [INFO] [stdout] --> language/src/bin/smart-pointers.rs:48:12 [INFO] [stdout] | [INFO] [stdout] 48 | pub fn append(node: &mut Rc>>, data: T) -> Option>>> { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `insert` [INFO] [stdout] --> language/src/bin/smart-pointers.rs:67:8 [INFO] [stdout] | [INFO] [stdout] 67 | fn insert(&mut self, elem: T) { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `bubble` [INFO] [stdout] --> language/src/bin/merge-sort.rs:12:4 [INFO] [stdout] | [INFO] [stdout] 12 | fn bubble(slice: &mut[T]) { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 9 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `bubble` [INFO] [stdout] --> language/src/bin/merge-sort.rs:12:4 [INFO] [stdout] | [INFO] [stdout] 12 | fn bubble(slice: &mut[T]) { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `x2` [INFO] [stdout] --> language/src/bin/arrays.rs:3:4 [INFO] [stdout] | [INFO] [stdout] 3 | fn x2(n: &i32) -> i32 { [INFO] [stdout] | ^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: constant is never used: `s` [INFO] [stdout] --> language/src/bin/arrays.rs:9:5 [INFO] [stdout] | [INFO] [stdout] 9 | const s: usize = 5; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: constant `s` should have an upper case name [INFO] [stdout] --> language/src/bin/arrays.rs:9:11 [INFO] [stdout] | [INFO] [stdout] 9 | const s: usize = 5; [INFO] [stdout] | ^ help: convert the identifier to upper case (notice the capitalization): `S` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_upper_case_globals)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `name` [INFO] [stdout] --> language/src/bin/composition.rs:37:5 [INFO] [stdout] | [INFO] [stdout] 37 | name: String, [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `id` [INFO] [stdout] --> language/src/bin/composition.rs:38:5 [INFO] [stdout] | [INFO] [stdout] 38 | id: String [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `vat_number` [INFO] [stdout] --> language/src/bin/composition.rs:92:5 [INFO] [stdout] | [INFO] [stdout] 92 | vat_number: f32, [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `data` [INFO] [stdout] --> language/src/bin/composition.rs:123:5 [INFO] [stdout] | [INFO] [stdout] 123 | data: PersonData, [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> language/src/bin/lifetimes.rs:53:37 [INFO] [stdout] | [INFO] [stdout] 53 | fn longest_always_x<'a>(x: &'a str, y: &str) -> &'a str { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `ptr` [INFO] [stdout] --> language/src/bin/iterators.rs:67:9 [INFO] [stdout] | [INFO] [stdout] 67 | let ptr = &hello[0..3]; [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_ptr` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `four` [INFO] [stdout] --> language/src/bin/iterators.rs:73:9 [INFO] [stdout] | [INFO] [stdout] 73 | let four = "4".parse::(); // using turbofish [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_four` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s2` [INFO] [stdout] --> language/src/bin/iterators.rs:77:9 [INFO] [stdout] | [INFO] [stdout] 77 | let s2: String = String::from("'String' is a growable, mutable, owned, UTF-8 encoded string type"); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `longest` [INFO] [stdout] --> language/src/bin/lifetimes.rs:42:4 [INFO] [stdout] | [INFO] [stdout] 42 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `longest_with_an_announcement` [INFO] [stdout] --> language/src/bin/lifetimes.rs:57:4 [INFO] [stdout] | [INFO] [stdout] 57 | fn longest_with_an_announcement<'a, T>(x: &'a str, y: &'a str, ann: T) -> &'a str [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::fs` [INFO] [stdout] --> language/src/bin/dir-rename.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::fs; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `iter_ex` [INFO] [stdout] --> language/src/bin/iterators.rs:11:4 [INFO] [stdout] | [INFO] [stdout] 11 | fn iter_ex() { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `into_iter_ex` [INFO] [stdout] --> language/src/bin/iterators.rs:37:4 [INFO] [stdout] | [INFO] [stdout] 37 | fn into_iter_ex() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `iter_mut_ex` [INFO] [stdout] --> language/src/bin/iterators.rs:50:4 [INFO] [stdout] | [INFO] [stdout] 50 | fn iter_mut_ex() { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `ErrorKind`, `Read` [INFO] [stdout] --> language/src/bin/dir-rename.rs:2:15 [INFO] [stdout] | [INFO] [stdout] 2 | use std::io::{ErrorKind, Read}; [INFO] [stdout] | ^^^^^^^^^ ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::io` [INFO] [stdout] --> language/src/bin/dir-rename.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | use std::io; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Captures` [INFO] [stdout] --> language/src/bin/dir-rename.rs:5:20 [INFO] [stdout] | [INFO] [stdout] 5 | use regex::{Regex, Captures}; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `findRegex` should have a snake case name [INFO] [stdout] --> language/src/bin/dir-rename.rs:9:9 [INFO] [stdout] | [INFO] [stdout] 9 | let findRegex = Regex::new(r"^(?P\(3\)\s+)(?P[-a-zA-Z0-9]+) - (?P\w+ \w+)\s+-\s+(?P[a-zA-Z0-9 ]+).+").expe... [INFO] [stdout] | ^^^^^^^^^ help: convert the identifier to snake case: `find_regex` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_snake_case)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `findRx` should have a snake case name [INFO] [stdout] --> language/src/bin/dir-rename.rs:13:38 [INFO] [stdout] | [INFO] [stdout] 13 | fn find_and_print_dir_names(p: &str, findRx: &Regex) { [INFO] [stdout] | ^^^^^^ help: convert the identifier to snake case: `find_rx` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `name` [INFO] [stdout] --> language/src/bin/composition.rs:37:5 [INFO] [stdout] | [INFO] [stdout] 37 | name: String, [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `id` [INFO] [stdout] --> language/src/bin/composition.rs:38:5 [INFO] [stdout] | [INFO] [stdout] 38 | id: String [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `vat_number` [INFO] [stdout] --> language/src/bin/composition.rs:92:5 [INFO] [stdout] | [INFO] [stdout] 92 | vat_number: f32, [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `data` [INFO] [stdout] --> language/src/bin/composition.rs:123:5 [INFO] [stdout] | [INFO] [stdout] 123 | data: PersonData, [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `i` is assigned to, but never used [INFO] [stdout] --> language/src/bin/strings.rs:38:13 [INFO] [stdout] | [INFO] [stdout] 38 | let mut i: usize = 0; [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] = note: consider using `_i` instead [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> language/src/bin/concurrency-threads.rs:41:13 [INFO] [stdout] | [INFO] [stdout] 41 | let s = String::from("KOOL"); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `spawning_threads` [INFO] [stdout] --> language/src/bin/concurrency-threads.rs:4:4 [INFO] [stdout] | [INFO] [stdout] 4 | fn spawning_threads() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `closure_thread` [INFO] [stdout] --> language/src/bin/concurrency-threads.rs:36:4 [INFO] [stdout] | [INFO] [stdout] 36 | fn closure_thread() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `Quit` [INFO] [stdout] --> language/src/bin/enums.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | Quit, [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `ChangeColor` [INFO] [stdout] --> language/src/bin/enums.rs:6:5 [INFO] [stdout] | [INFO] [stdout] 6 | ChangeColor(i32, i32, i32), [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::fs` [INFO] [stdout] --> language/src/bin/dir-rename.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::fs; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `ErrorKind`, `Read` [INFO] [stdout] --> language/src/bin/dir-rename.rs:2:15 [INFO] [stdout] | [INFO] [stdout] 2 | use std::io::{ErrorKind, Read}; [INFO] [stdout] | ^^^^^^^^^ ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::io` [INFO] [stdout] --> language/src/bin/dir-rename.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | use std::io; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Captures` [INFO] [stdout] --> language/src/bin/dir-rename.rs:5:20 [INFO] [stdout] | [INFO] [stdout] 5 | use regex::{Regex, Captures}; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `black` [INFO] [stdout] --> language/src/bin/structs.rs:50:9 [INFO] [stdout] | [INFO] [stdout] 50 | let black = Color(0, 0, 0); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_black` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `origin` [INFO] [stdout] --> language/src/bin/structs.rs:51:9 [INFO] [stdout] | [INFO] [stdout] 51 | let origin = Point(0, 0, 0); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_origin` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `findRegex` should have a snake case name [INFO] [stdout] --> language/src/bin/dir-rename.rs:9:9 [INFO] [stdout] | [INFO] [stdout] 9 | let findRegex = Regex::new(r"^(?P<prefix>\(3\)\s+)(?P<mag>[-a-zA-Z0-9]+) - (?P<model>\w+ \w+)\s+-\s+(?P<title>[a-zA-Z0-9 ]+).+").expe... [INFO] [stdout] | ^^^^^^^^^ help: convert the identifier to snake case: `find_regex` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_snake_case)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `findRx` should have a snake case name [INFO] [stdout] --> language/src/bin/dir-rename.rs:13:38 [INFO] [stdout] | [INFO] [stdout] 13 | fn find_and_print_dir_names(p: &str, findRx: &Regex) { [INFO] [stdout] | ^^^^^^ help: convert the identifier to snake case: `find_rx` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `area` [INFO] [stdout] --> language/src/bin/structs.rs:10:8 [INFO] [stdout] | [INFO] [stdout] 10 | fn area(&self) -> u32 { [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `marea` [INFO] [stdout] --> language/src/bin/structs.rs:14:8 [INFO] [stdout] | [INFO] [stdout] 14 | fn marea(&mut self) -> u32 { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Cell` [INFO] [stdout] --> language/src/bin/smart-pointers.rs:1:17 [INFO] [stdout] | [INFO] [stdout] 1 | use std::cell::{Cell, RefCell}; [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> language/src/bin/file-io.rs:22:9 [INFO] [stdout] | [INFO] [stdout] 22 | let f = File::open("hello.txt").unwrap_or_else(|error| { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `read_lines` [INFO] [stdout] --> language/src/bin/file-io.rs:15:4 [INFO] [stdout] | [INFO] [stdout] 15 | fn read_lines<P>(filename: P) -> io::Result<io::Lines<io::BufReader<File>>> [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `open_file` [INFO] [stdout] --> language/src/bin/file-io.rs:21:4 [INFO] [stdout] | [INFO] [stdout] 21 | fn open_file() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `read_from_file_to_string_v1` [INFO] [stdout] --> language/src/bin/file-io.rs:33:4 [INFO] [stdout] | [INFO] [stdout] 33 | fn read_from_file_to_string_v1() -> Result<String, io::Error> { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `read_from_file_to_string_v2` [INFO] [stdout] --> language/src/bin/file-io.rs:40:4 [INFO] [stdout] | [INFO] [stdout] 40 | fn read_from_file_to_string_v2() -> Result<String, io::Error> { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `read_from_file_to_string_v3` [INFO] [stdout] --> language/src/bin/file-io.rs:48:4 [INFO] [stdout] | [INFO] [stdout] 48 | fn read_from_file_to_string_v3(path: &str) -> Result<String, io::Error> { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `print_dir_names` [INFO] [stdout] --> language/src/bin/file-io.rs:52:4 [INFO] [stdout] | [INFO] [stdout] 52 | fn print_dir_names(p: &str) { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `root` [INFO] [stdout] --> language/src/bin/smart-pointers.rs:75:13 [INFO] [stdout] | [INFO] [stdout] 75 | let mut root = Tree { root: Some(rc0.clone()), len: 0 }; [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_root` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `elem` [INFO] [stdout] --> language/src/bin/smart-pointers.rs:67:26 [INFO] [stdout] | [INFO] [stdout] 67 | fn insert(&mut self, elem: T) { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_elem` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> language/src/bin/smart-pointers.rs:73:9 [INFO] [stdout] | [INFO] [stdout] 73 | let mut rn = Node { elem:50, color: Color::Black, parent: None, left: None, right: None}; [INFO] [stdout] | ----^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> language/src/bin/smart-pointers.rs:75:9 [INFO] [stdout] | [INFO] [stdout] 75 | let mut root = Tree { root: Some(rc0.clone()), len: 0 }; [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `root` [INFO] [stdout] --> language/src/bin/smart-pointers.rs:26:5 [INFO] [stdout] | [INFO] [stdout] 26 | root: Link<T>, [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `len` [INFO] [stdout] --> language/src/bin/smart-pointers.rs:27:5 [INFO] [stdout] | [INFO] [stdout] 27 | len: usize, [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `append` [INFO] [stdout] --> language/src/bin/smart-pointers.rs:48:12 [INFO] [stdout] | [INFO] [stdout] 48 | pub fn append(node: &mut Rc<RefCell<Node<T>>>, data: T) -> Option<Rc<RefCell<Node<T>>>> { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `insert` [INFO] [stdout] --> language/src/bin/smart-pointers.rs:67:8 [INFO] [stdout] | [INFO] [stdout] 67 | fn insert(&mut self, elem: T) { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `simulated_user_specified_value` [INFO] [stdout] --> language/src/bin/closures.rs:83:9 [INFO] [stdout] | [INFO] [stdout] 83 | let simulated_user_specified_value = 10; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_simulated_user_specified_value` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct is never constructed: `Cacher` [INFO] [stdout] --> language/src/bin/closures.rs:24:8 [INFO] [stdout] | [INFO] [stdout] 24 | struct Cacher<T> [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `new` [INFO] [stdout] --> language/src/bin/closures.rs:33:8 [INFO] [stdout] | [INFO] [stdout] 33 | fn new(calculation: T) -> Cacher<T> { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `value` [INFO] [stdout] --> language/src/bin/closures.rs:40:8 [INFO] [stdout] | [INFO] [stdout] 40 | fn value(&mut self, arg: u32) -> u32 { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `generate_workout` [INFO] [stdout] --> language/src/bin/closures.rs:52:4 [INFO] [stdout] | [INFO] [stdout] 52 | fn generate_workout(intensity: u32, random_number: u32) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 7 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> language/src/bin/fibonacci.rs:32:9 [INFO] [stdout] | [INFO] [stdout] 32 | let f = Fib::new(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 9 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking reqwest v0.9.24 [INFO] [stdout] warning: value assigned to `pos` is never read [INFO] [stdout] --> language/src/bin/ranges.rs:9:13 [INFO] [stdout] | [INFO] [stdout] 9 | let mut pos: usize = 0; [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_assignments)]` on by default [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> language/src/bin/lifetimes-structs.rs:71:9 [INFO] [stdout] | [INFO] [stdout] 71 | let i = ImportantExcerpt { part: first_sentence }; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `part` [INFO] [stdout] --> language/src/bin/lifetimes-structs.rs:33:5 [INFO] [stdout] | [INFO] [stdout] 33 | part: &'a str, [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `level` [INFO] [stdout] --> language/src/bin/lifetimes-structs.rs:37:8 [INFO] [stdout] | [INFO] [stdout] 37 | fn level(&self) -> i32 { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `announce_and_return_part` [INFO] [stdout] --> language/src/bin/lifetimes-structs.rs:44:8 [INFO] [stdout] | [INFO] [stdout] 44 | fn announce_and_return_part(&self, announcement: &str) -> &str { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> language/src/bin/concurrency-threads.rs:41:13 [INFO] [stdout] | [INFO] [stdout] 41 | let s = String::from("KOOL"); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `spawning_threads` [INFO] [stdout] --> language/src/bin/concurrency-threads.rs:4:4 [INFO] [stdout] | [INFO] [stdout] 4 | fn spawning_threads() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> language/src/bin/lifetimes-structs.rs:71:9 [INFO] [stdout] | [INFO] [stdout] 71 | let i = ImportantExcerpt { part: first_sentence }; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `closure_thread` [INFO] [stdout] --> language/src/bin/concurrency-threads.rs:36:4 [INFO] [stdout] | [INFO] [stdout] 36 | fn closure_thread() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `part` [INFO] [stdout] --> language/src/bin/lifetimes-structs.rs:33:5 [INFO] [stdout] | [INFO] [stdout] 33 | part: &'a str, [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `level` [INFO] [stdout] --> language/src/bin/lifetimes-structs.rs:37:8 [INFO] [stdout] | [INFO] [stdout] 37 | fn level(&self) -> i32 { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `announce_and_return_part` [INFO] [stdout] --> language/src/bin/lifetimes-structs.rs:44:8 [INFO] [stdout] | [INFO] [stdout] 44 | fn announce_and_return_part(&self, announcement: &str) -> &str { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `x2` [INFO] [stdout] --> language/src/bin/arrays.rs:3:4 [INFO] [stdout] | [INFO] [stdout] 3 | fn x2(n: &i32) -> i32 { [INFO] [stdout] | ^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: constant `s` should have an upper case name [INFO] [stdout] --> language/src/bin/arrays.rs:9:11 [INFO] [stdout] | [INFO] [stdout] 9 | const s: usize = 5; [INFO] [stdout] | ^ help: convert the identifier to upper case (notice the capitalization): `S` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_upper_case_globals)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `Quit` [INFO] [stdout] --> language/src/bin/enums.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | Quit, [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `ChangeColor` [INFO] [stdout] --> language/src/bin/enums.rs:6:5 [INFO] [stdout] | [INFO] [stdout] 6 | ChangeColor(i32, i32, i32), [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> language/src/bin/trait-objects.rs:50:21 [INFO] [stdout] | [INFO] [stdout] 50 | let ducks: Vec<&Quack> = vec![&duck1,&duck2,&parrot]; [INFO] [stdout] | ^^^^^ help: use `dyn`: `dyn Quack` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165> [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `simulated_user_specified_value` [INFO] [stdout] --> language/src/bin/closures.rs:83:9 [INFO] [stdout] | [INFO] [stdout] 83 | let simulated_user_specified_value = 10; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_simulated_user_specified_value` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct is never constructed: `Cacher` [INFO] [stdout] --> language/src/bin/closures.rs:24:8 [INFO] [stdout] | [INFO] [stdout] 24 | struct Cacher<T> [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `new` [INFO] [stdout] --> language/src/bin/closures.rs:33:8 [INFO] [stdout] | [INFO] [stdout] 33 | fn new(calculation: T) -> Cacher<T> { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `value` [INFO] [stdout] --> language/src/bin/closures.rs:40:8 [INFO] [stdout] | [INFO] [stdout] 40 | fn value(&mut self, arg: u32) -> u32 { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `generate_workout` [INFO] [stdout] --> language/src/bin/closures.rs:52:4 [INFO] [stdout] | [INFO] [stdout] 52 | fn generate_workout(intensity: u32, random_number: u32) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v2` [INFO] [stdout] --> language/src/bin/slices.rs:7:13 [INFO] [stdout] | [INFO] [stdout] 7 | let mut v2 = vec![2, 4, 6, 8]; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_v2` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r` [INFO] [stdout] --> language/src/bin/slices.rs:15:13 [INFO] [stdout] | [INFO] [stdout] 15 | let (l, r) = slice.split_at_mut(mid); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_r` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> language/src/bin/slices.rs:7:9 [INFO] [stdout] | [INFO] [stdout] 7 | let mut v2 = vec![2, 4, 6, 8]; [INFO] [stdout] | ----^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking async-await v0.1.0 (/opt/rustwide/workdir/async-await) [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 3m 13s [INFO] running `Command { std: "docker" "inspect" "6dfa51d1244130f924ecac616f89f25fb45c7ae1a98f3be0e742a6378403b713", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "6dfa51d1244130f924ecac616f89f25fb45c7ae1a98f3be0e742a6378403b713", kill_on_drop: false }` [INFO] [stdout] 6dfa51d1244130f924ecac616f89f25fb45c7ae1a98f3be0e742a6378403b713