[INFO] cloning repository https://github.com/tokiwadai/rust_prog_lang [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tokiwadai/rust_prog_lang" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftokiwadai%2Frust_prog_lang", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftokiwadai%2Frust_prog_lang'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 3d9345684ffb8b38f1b653311179fbd972e37537 [INFO] testing tokiwadai/rust_prog_lang against beta-2020-07-24 for beta-1.46-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftokiwadai%2Frust_prog_lang" "/workspace/builds/worker-3/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/tokiwadai/rust_prog_lang on toolchain beta-2020-07-24 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/tokiwadai/rust_prog_lang [INFO] finished tweaking git repo https://github.com/tokiwadai/rust_prog_lang [INFO] tweaked toml for git repo https://github.com/tokiwadai/rust_prog_lang written to /workspace/builds/worker-3/source/Cargo.toml [INFO] crate git repo https://github.com/tokiwadai/rust_prog_lang already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 40527ca2a70d1f5dcaa372da1f974ff51f5b6030a31c206eb68f0771f8949a26 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "40527ca2a70d1f5dcaa372da1f974ff51f5b6030a31c206eb68f0771f8949a26", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "40527ca2a70d1f5dcaa372da1f974ff51f5b6030a31c206eb68f0771f8949a26", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "40527ca2a70d1f5dcaa372da1f974ff51f5b6030a31c206eb68f0771f8949a26", kill_on_drop: false }` [INFO] [stdout] 40527ca2a70d1f5dcaa372da1f974ff51f5b6030a31c206eb68f0771f8949a26 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 1870e87a14d99c4163e21f5f5e49aa1de133399669a8d88648012ac974f7c30b [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "1870e87a14d99c4163e21f5f5e49aa1de133399669a8d88648012ac974f7c30b", kill_on_drop: false }` [INFO] [stderr] Compiling rust_prog_lang v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `order1` [INFO] [stdout] --> src/lib.rs:57:9 [INFO] [stdout] | [INFO] [stdout] 57 | let order1 = back_of_house::Appetizer::Soup; [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_order1` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `order2` [INFO] [stdout] --> src/lib.rs:58:9 [INFO] [stdout] | [INFO] [stdout] 58 | let order2 = back_of_house::Appetizer::Salad; [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_order2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `seat_at_table` [INFO] [stdout] --> src/front_of_house/hosting.rs:2:4 [INFO] [stdout] | [INFO] [stdout] 2 | fn seat_at_table() {} [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `take_order` [INFO] [stdout] --> src/front_of_house.rs:4:8 [INFO] [stdout] | [INFO] [stdout] 4 | fn take_order() {} [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `serve_order` [INFO] [stdout] --> src/front_of_house.rs:5:8 [INFO] [stdout] | [INFO] [stdout] 5 | fn serve_order() {} [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `take_payment` [INFO] [stdout] --> src/front_of_house.rs:6:8 [INFO] [stdout] | [INFO] [stdout] 6 | fn take_payment() {} [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `serve_order` [INFO] [stdout] --> src/lib.rs:16:4 [INFO] [stdout] | [INFO] [stdout] 16 | fn serve_order() {} [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `seasonal_fruit` [INFO] [stdout] --> src/lib.rs:21:9 [INFO] [stdout] | [INFO] [stdout] 21 | seasonal_fruit: String, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `cook_order` [INFO] [stdout] --> src/lib.rs:33:8 [INFO] [stdout] | [INFO] [stdout] 33 | fn cook_order() {} [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `fix_incorrect_order` [INFO] [stdout] --> src/lib.rs:34:8 [INFO] [stdout] | [INFO] [stdout] 34 | fn fix_incorrect_order() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 10 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `name` [INFO] [stdout] --> src/bin/chap11/1_test_samples.rs:9:18 [INFO] [stdout] | [INFO] [stdout] 9 | pub fn greeting2(name: &str) -> String { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_name` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `value` [INFO] [stdout] --> src/bin/chap11/1_test_samples.rs:14:5 [INFO] [stdout] | [INFO] [stdout] 14 | value: i32, [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/chap8/2_vec_immut_ref.rs:4:9 [INFO] [stdout] | [INFO] [stdout] 4 | let mut v = vec![1, 2, 3, 4, 5]; [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: method `newB` should have a snake case name [INFO] [stdout] --> src/bin/chap11/1_test_samples.rs:24:12 [INFO] [stdout] | [INFO] [stdout] 24 | pub fn newB(value: i32) -> Guess { [INFO] [stdout] | ^^^^ help: convert the identifier to snake case: `new_b` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_snake_case)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `new` [INFO] [stdout] --> src/bin/chap13/6_create_own_iter_samples.rs:6:8 [INFO] [stdout] | [INFO] [stdout] 6 | fn new() -> Counter { [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: `distance_from_origin` [INFO] [stdout] --> src/bin/chap10/1_generic_samples.rs:12:8 [INFO] [stdout] | [INFO] [stdout] 12 | fn distance_from_origin(&self) -> f32 { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `t` [INFO] [stdout] --> src/bin/chap10/2_trait_samples.rs:57:24 [INFO] [stdout] | [INFO] [stdout] 57 | fn some_function(t: &T, u: &U) -> i32 [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `u` [INFO] [stdout] --> src/bin/chap10/2_trait_samples.rs:57:31 [INFO] [stdout] | [INFO] [stdout] 57 | fn some_function(t: &T, u: &U) -> i32 [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_u` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `some_function` [INFO] [stdout] --> src/bin/chap10/2_trait_samples.rs:57:4 [INFO] [stdout] | [INFO] [stdout] 57 | fn some_function(t: &T, u: &U) -> i32 [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/bin/chap8/4_string_samples.rs:3:9 [INFO] [stdout] | [INFO] [stdout] 3 | let mut s = String::new(); [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: unused variable: `s` [INFO] [stdout] --> src/bin/chap8/4_string_samples.rs:6:9 [INFO] [stdout] | [INFO] [stdout] 6 | let s = data.to_string(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/bin/chap8/4_string_samples.rs:11:9 [INFO] [stdout] | [INFO] [stdout] 11 | let s = "initial contents".to_string(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/bin/chap8/4_string_samples.rs:13:9 [INFO] [stdout] | [INFO] [stdout] 13 | let s = String::from("initial contents"); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/chap8/4_string_samples.rs:18:9 [INFO] [stdout] | [INFO] [stdout] 18 | let hello = String::from("السلام علیكم"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/chap8/4_string_samples.rs:19:9 [INFO] [stdout] | [INFO] [stdout] 19 | let hello = String::from("Dobrý den"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/chap8/4_string_samples.rs:20:9 [INFO] [stdout] | [INFO] [stdout] 20 | let hello = String::from("Hello"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/chap8/4_string_samples.rs:21:9 [INFO] [stdout] | [INFO] [stdout] 21 | let hello = String::from("Здравствуйте"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/chap8/4_string_samples.rs:22:9 [INFO] [stdout] | [INFO] [stdout] 22 | let hello = String::from("Hola"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/chap8/4_string_samples.rs:3:9 [INFO] [stdout] | [INFO] [stdout] 3 | let mut s = String::new(); [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: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `some_string` [INFO] [stdout] --> src/bin/chap4/4_reference_borrowing.rs:28:17 [INFO] [stdout] | [INFO] [stdout] 28 | fn change_immut(some_string: &String) { [INFO] [stdout] | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_string` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [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: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused doc comment [INFO] [stdout] --> src/bin/chap10/5_lifetime_generic_samples.rs:64:5 [INFO] [stdout] | [INFO] [stdout] 64 | / /** This won't compile, pp. 220 [INFO] [stdout] 65 | | let result; [INFO] [stdout] 66 | | { [INFO] [stdout] 67 | | let string2 = String::from("xyz"); [INFO] [stdout] ... | [INFO] [stdout] 70 | | println!("The longest string is {}", result); [INFO] [stdout] 71 | | */ [INFO] [stdout] | |______^ [INFO] [stdout] 72 | [INFO] [stdout] 73 | let string1 = String::from("abcd"); [INFO] [stdout] | ----------------------------------- rustdoc does not generate documentation for statements [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_doc_comments)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> src/bin/chap10/5_lifetime_generic_samples.rs:27:30 [INFO] [stdout] | [INFO] [stdout] 27 | fn longest_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: `string1` [INFO] [stdout] --> src/bin/chap10/5_lifetime_generic_samples.rs:63:9 [INFO] [stdout] | [INFO] [stdout] 63 | let string1 = String::from("long string is long"); [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_string1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `longest_x` [INFO] [stdout] --> src/bin/chap10/5_lifetime_generic_samples.rs:27:4 [INFO] [stdout] | [INFO] [stdout] 27 | fn longest_x<'a>(x: &'a str, y: &str) -> &'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: `new` [INFO] [stdout] --> src/bin/chap10/4_generic_trait_samples.rs:10:8 [INFO] [stdout] | [INFO] [stdout] 10 | fn new(x: T, y: T) -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `word` [INFO] [stdout] --> src/bin/chap4/7_string_slices.rs:3:9 [INFO] [stdout] | [INFO] [stdout] 3 | let word = first_word(&s); // word will get the value 5 [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_word` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 10 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> src/bin/chap9/3_result_matching_samples.rs:43:9 [INFO] [stdout] | [INFO] [stdout] 43 | let f = File::open("hello2.txt") [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: `shoes_in_my_size` [INFO] [stdout] --> src/bin/chap13/5_closure_iter_samples.rs:9:4 [INFO] [stdout] | [INFO] [stdout] 9 | fn shoes_in_my_size(shoes: Vec, shoe_size: u32) -> 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: `read_username_from_file` [INFO] [stdout] --> src/bin/chap9/4_propagating_error.rs:12:4 [INFO] [stdout] | [INFO] [stdout] 12 | fn read_username_from_file() -> 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: `read_username_from_file2` [INFO] [stdout] --> src/bin/chap9/4_propagating_error.rs:29:4 [INFO] [stdout] | [INFO] [stdout] 29 | fn read_username_from_file2() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `read_username_from_file3` [INFO] [stdout] --> src/bin/chap9/4_propagating_error.rs:38:4 [INFO] [stdout] | [INFO] [stdout] 38 | fn read_username_from_file3() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [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: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [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: unused variable: `list` [INFO] [stdout] --> src/bin/chap10/3_generic_trait_samples.rs:21:24 [INFO] [stdout] | [INFO] [stdout] 21 | fn largest_not_work(list: &[T]) -> T { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_list` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `s2` is never read [INFO] [stdout] --> src/bin/chap4/1_variable_scope.rs:7:9 [INFO] [stdout] | [INFO] [stdout] 7 | let mut s2 = "hello world!"; [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: function is never used: `largest_not_work` [INFO] [stdout] --> src/bin/chap10/3_generic_trait_samples.rs:21:4 [INFO] [stdout] | [INFO] [stdout] 21 | fn largest_not_work(list: &[T]) -> 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: unused doc comment [INFO] [stdout] --> src/bin/chap4/5_mut_immut_references.rs:6:5 [INFO] [stdout] | [INFO] [stdout] 6 | / /** [INFO] [stdout] 7 | | * you can have only one mutable reference [INFO] [stdout] 8 | | * to a particular piece of data in a particular scope [INFO] [stdout] 9 | | * [INFO] [stdout] 10 | | * Code below will fail [INFO] [stdout] 11 | | */ [INFO] [stdout] | |______^ rustdoc does not generate documentation for macro invocations [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_doc_comments)]` on by default [INFO] [stdout] = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> src/bin/chap9/2_result_recoverable_samples.rs:5:9 [INFO] [stdout] | [INFO] [stdout] 5 | let f = match f { [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 variable: `r1` [INFO] [stdout] --> src/bin/chap4/5_mut_immut_references.rs:19:13 [INFO] [stdout] | [INFO] [stdout] 19 | let r1 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/chap4/5_mut_immut_references.rs:28:9 [INFO] [stdout] | [INFO] [stdout] 28 | let mut s = String::from("hello"); [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: 1 warning 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: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 10.59s [INFO] running `Command { std: "docker" "inspect" "1870e87a14d99c4163e21f5f5e49aa1de133399669a8d88648012ac974f7c30b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "1870e87a14d99c4163e21f5f5e49aa1de133399669a8d88648012ac974f7c30b", kill_on_drop: false }` [INFO] [stdout] 1870e87a14d99c4163e21f5f5e49aa1de133399669a8d88648012ac974f7c30b [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 103020c85e28e269a2aa1d931e05785fe175522e0200f037ac8edecad03cae7b [INFO] running `Command { std: "docker" "start" "-a" "103020c85e28e269a2aa1d931e05785fe175522e0200f037ac8edecad03cae7b", kill_on_drop: false }` [INFO] [stderr] Compiling rust_prog_lang v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `order1` [INFO] [stdout] --> src/lib.rs:57:9 [INFO] [stdout] | [INFO] [stdout] 57 | let order1 = back_of_house::Appetizer::Soup; [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_order1` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `order2` [INFO] [stdout] --> src/lib.rs:58:9 [INFO] [stdout] | [INFO] [stdout] 58 | let order2 = back_of_house::Appetizer::Salad; [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_order2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `seat_at_table` [INFO] [stdout] --> src/front_of_house/hosting.rs:2:4 [INFO] [stdout] | [INFO] [stdout] 2 | fn seat_at_table() {} [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `take_order` [INFO] [stdout] --> src/front_of_house.rs:4:8 [INFO] [stdout] | [INFO] [stdout] 4 | fn take_order() {} [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `serve_order` [INFO] [stdout] --> src/front_of_house.rs:5:8 [INFO] [stdout] | [INFO] [stdout] 5 | fn serve_order() {} [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `take_payment` [INFO] [stdout] --> src/front_of_house.rs:6:8 [INFO] [stdout] | [INFO] [stdout] 6 | fn take_payment() {} [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `serve_order` [INFO] [stdout] --> src/lib.rs:16:4 [INFO] [stdout] | [INFO] [stdout] 16 | fn serve_order() {} [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `seasonal_fruit` [INFO] [stdout] --> src/lib.rs:21:9 [INFO] [stdout] | [INFO] [stdout] 21 | seasonal_fruit: String, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `cook_order` [INFO] [stdout] --> src/lib.rs:33:8 [INFO] [stdout] | [INFO] [stdout] 33 | fn cook_order() {} [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `fix_incorrect_order` [INFO] [stdout] --> src/lib.rs:34:8 [INFO] [stdout] | [INFO] [stdout] 34 | fn fix_incorrect_order() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 10 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> src/bin/chap9/2_result_recoverable_samples.rs:5:9 [INFO] [stdout] | [INFO] [stdout] 5 | let f = match f { [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: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `s2` is never read [INFO] [stdout] --> src/bin/chap4/1_variable_scope.rs:7:9 [INFO] [stdout] | [INFO] [stdout] 7 | let mut s2 = "hello world!"; [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: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `distance_from_origin` [INFO] [stdout] --> src/bin/chap10/1_generic_samples.rs:12:8 [INFO] [stdout] | [INFO] [stdout] 12 | fn distance_from_origin(&self) -> f32 { [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: associated function is never used: `new` [INFO] [stdout] --> src/bin/chap10/4_generic_trait_samples.rs:10:8 [INFO] [stdout] | [INFO] [stdout] 10 | fn new(x: T, y: T) -> Self { [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: `shoes_in_my_size` [INFO] [stdout] --> src/bin/chap13/5_closure_iter_samples.rs:9:4 [INFO] [stdout] | [INFO] [stdout] 9 | fn shoes_in_my_size(shoes: Vec, shoe_size: u32) -> Vec { [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: `read_username_from_file` [INFO] [stdout] --> src/bin/chap9/4_propagating_error.rs:12:4 [INFO] [stdout] | [INFO] [stdout] 12 | fn read_username_from_file() -> 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: `read_username_from_file2` [INFO] [stdout] --> src/bin/chap9/4_propagating_error.rs:29:4 [INFO] [stdout] | [INFO] [stdout] 29 | fn read_username_from_file2() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `read_username_from_file3` [INFO] [stdout] --> src/bin/chap9/4_propagating_error.rs:38:4 [INFO] [stdout] | [INFO] [stdout] 38 | fn read_username_from_file3() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> src/bin/chap9/3_result_matching_samples.rs:43:9 [INFO] [stdout] | [INFO] [stdout] 43 | let f = File::open("hello2.txt") [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 variable: `order1` [INFO] [stdout] --> src/lib.rs:57:9 [INFO] [stdout] | [INFO] [stdout] 57 | let order1 = back_of_house::Appetizer::Soup; [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_order1` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `order2` [INFO] [stdout] --> src/lib.rs:58:9 [INFO] [stdout] | [INFO] [stdout] 58 | let order2 = back_of_house::Appetizer::Salad; [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_order2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `some_string` [INFO] [stdout] --> src/bin/chap4/4_reference_borrowing.rs:28:17 [INFO] [stdout] | [INFO] [stdout] 28 | fn change_immut(some_string: &String) { [INFO] [stdout] | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_string` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `seat_at_table` [INFO] [stdout] --> src/front_of_house/hosting.rs:2:4 [INFO] [stdout] | [INFO] [stdout] 2 | fn seat_at_table() {} [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `take_order` [INFO] [stdout] --> src/front_of_house.rs:4:8 [INFO] [stdout] | [INFO] [stdout] 4 | fn take_order() {} [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `serve_order` [INFO] [stdout] --> src/front_of_house.rs:5:8 [INFO] [stdout] | [INFO] [stdout] 5 | fn serve_order() {} [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `take_payment` [INFO] [stdout] --> src/front_of_house.rs:6:8 [INFO] [stdout] | [INFO] [stdout] 6 | fn take_payment() {} [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `serve_order` [INFO] [stdout] --> src/lib.rs:16:4 [INFO] [stdout] | [INFO] [stdout] 16 | fn serve_order() {} [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `seasonal_fruit` [INFO] [stdout] --> src/lib.rs:21:9 [INFO] [stdout] | [INFO] [stdout] 21 | seasonal_fruit: String, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `cook_order` [INFO] [stdout] --> src/lib.rs:33:8 [INFO] [stdout] | [INFO] [stdout] 33 | fn cook_order() {} [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `fix_incorrect_order` [INFO] [stdout] --> src/lib.rs:34:8 [INFO] [stdout] | [INFO] [stdout] 34 | fn fix_incorrect_order() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> src/bin/chap9/2_result_recoverable_samples.rs:5:9 [INFO] [stdout] | [INFO] [stdout] 5 | let f = match f { [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 variable: `word` [INFO] [stdout] --> src/bin/chap4/7_string_slices.rs:3:9 [INFO] [stdout] | [INFO] [stdout] 3 | let word = first_word(&s); // word will get the value 5 [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_word` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/bin/chap8/4_string_samples.rs:3:9 [INFO] [stdout] | [INFO] [stdout] 3 | let mut s = String::new(); [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: unused variable: `s` [INFO] [stdout] --> src/bin/chap8/4_string_samples.rs:6:9 [INFO] [stdout] | [INFO] [stdout] 6 | let s = data.to_string(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/bin/chap8/4_string_samples.rs:11:9 [INFO] [stdout] | [INFO] [stdout] 11 | let s = "initial contents".to_string(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/bin/chap8/4_string_samples.rs:13:9 [INFO] [stdout] | [INFO] [stdout] 13 | let s = String::from("initial contents"); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/chap8/4_string_samples.rs:18:9 [INFO] [stdout] | [INFO] [stdout] 18 | let hello = String::from("السلام علیكم"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/chap8/4_string_samples.rs:19:9 [INFO] [stdout] | [INFO] [stdout] 19 | let hello = String::from("Dobrý den"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/chap8/4_string_samples.rs:20:9 [INFO] [stdout] | [INFO] [stdout] 20 | let hello = String::from("Hello"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/chap8/4_string_samples.rs:21:9 [INFO] [stdout] | [INFO] [stdout] 21 | let hello = String::from("Здравствуйте"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/chap8/4_string_samples.rs:22:9 [INFO] [stdout] | [INFO] [stdout] 22 | let hello = String::from("Hola"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/chap8/4_string_samples.rs:3:9 [INFO] [stdout] | [INFO] [stdout] 3 | let mut s = String::new(); [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: 10 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: unused variable: `word` [INFO] [stdout] --> src/bin/chap4/7_string_slices.rs:3:9 [INFO] [stdout] | [INFO] [stdout] 3 | let word = first_word(&s); // word will get the value 5 [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_word` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `name` [INFO] [stdout] --> src/bin/chap11/1_test_samples.rs:9:18 [INFO] [stdout] | [INFO] [stdout] 9 | pub fn greeting2(name: &str) -> String { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_name` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `value` [INFO] [stdout] --> src/bin/chap11/1_test_samples.rs:14:5 [INFO] [stdout] | [INFO] [stdout] 14 | value: i32, [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `newB` should have a snake case name [INFO] [stdout] --> src/bin/chap11/1_test_samples.rs:24:12 [INFO] [stdout] | [INFO] [stdout] 24 | pub fn newB(value: i32) -> Guess { [INFO] [stdout] | ^^^^ help: convert the identifier to snake case: `new_b` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_snake_case)]` on by default [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: unused variable: `t` [INFO] [stdout] --> src/bin/chap10/2_trait_samples.rs:57:24 [INFO] [stdout] | [INFO] [stdout] 57 | fn some_function(t: &T, u: &U) -> i32 [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `u` [INFO] [stdout] --> src/bin/chap10/2_trait_samples.rs:57:31 [INFO] [stdout] | [INFO] [stdout] 57 | fn some_function(t: &T, u: &U) -> i32 [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_u` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `some_function` [INFO] [stdout] --> src/bin/chap10/2_trait_samples.rs:57:4 [INFO] [stdout] | [INFO] [stdout] 57 | fn some_function(t: &T, u: &U) -> i32 [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused doc comment [INFO] [stdout] --> src/bin/chap4/5_mut_immut_references.rs:6:5 [INFO] [stdout] | [INFO] [stdout] 6 | / /** [INFO] [stdout] 7 | | * you can have only one mutable reference [INFO] [stdout] 8 | | * to a particular piece of data in a particular scope [INFO] [stdout] 9 | | * [INFO] [stdout] 10 | | * Code below will fail [INFO] [stdout] 11 | | */ [INFO] [stdout] | |______^ rustdoc does not generate documentation for macro invocations [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_doc_comments)]` on by default [INFO] [stdout] = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r1` [INFO] [stdout] --> src/bin/chap4/5_mut_immut_references.rs:19:13 [INFO] [stdout] | [INFO] [stdout] 19 | let r1 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/chap4/5_mut_immut_references.rs:28:9 [INFO] [stdout] | [INFO] [stdout] 28 | let mut s = String::from("hello"); [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: `name` [INFO] [stdout] --> src/bin/chap11/1_test_samples.rs:9:18 [INFO] [stdout] | [INFO] [stdout] 9 | pub fn greeting2(name: &str) -> String { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_name` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `value` [INFO] [stdout] --> src/bin/chap11/1_test_samples.rs:14:5 [INFO] [stdout] | [INFO] [stdout] 14 | value: i32, [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `list` [INFO] [stdout] --> src/bin/chap10/3_generic_trait_samples.rs:21:24 [INFO] [stdout] | [INFO] [stdout] 21 | fn largest_not_work(list: &[T]) -> T { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_list` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `largest_not_work` [INFO] [stdout] --> src/bin/chap10/3_generic_trait_samples.rs:21:4 [INFO] [stdout] | [INFO] [stdout] 21 | fn largest_not_work(list: &[T]) -> 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: method `newB` should have a snake case name [INFO] [stdout] --> src/bin/chap11/1_test_samples.rs:24:12 [INFO] [stdout] | [INFO] [stdout] 24 | pub fn newB(value: i32) -> Guess { [INFO] [stdout] | ^^^^ help: convert the identifier to snake case: `new_b` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_snake_case)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `greater_than_100B` should have a snake case name [INFO] [stdout] --> src/bin/chap11/1_test_samples.rs:81:8 [INFO] [stdout] | [INFO] [stdout] 81 | fn greater_than_100B() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `greater_than_100_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `read_username_from_file` [INFO] [stdout] --> src/bin/chap9/4_propagating_error.rs:12:4 [INFO] [stdout] | [INFO] [stdout] 12 | fn read_username_from_file() -> 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: `read_username_from_file2` [INFO] [stdout] --> src/bin/chap9/4_propagating_error.rs:29:4 [INFO] [stdout] | [INFO] [stdout] 29 | fn read_username_from_file2() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `read_username_from_file3` [INFO] [stdout] --> src/bin/chap9/4_propagating_error.rs:38:4 [INFO] [stdout] | [INFO] [stdout] 38 | fn read_username_from_file3() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 10 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `distance_from_origin` [INFO] [stdout] --> src/bin/chap10/1_generic_samples.rs:12:8 [INFO] [stdout] | [INFO] [stdout] 12 | fn distance_from_origin(&self) -> f32 { [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] --> src/bin/chap10/4_generic_trait_samples.rs:10:8 [INFO] [stdout] | [INFO] [stdout] 10 | fn new(x: T, y: T) -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused doc comment [INFO] [stdout] --> src/bin/chap4/5_mut_immut_references.rs:6:5 [INFO] [stdout] | [INFO] [stdout] 6 | / /** [INFO] [stdout] 7 | | * you can have only one mutable reference [INFO] [stdout] 8 | | * to a particular piece of data in a particular scope [INFO] [stdout] 9 | | * [INFO] [stdout] 10 | | * Code below will fail [INFO] [stdout] 11 | | */ [INFO] [stdout] | |______^ rustdoc does not generate documentation for macro invocations [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_doc_comments)]` on by default [INFO] [stdout] = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r1` [INFO] [stdout] --> src/bin/chap4/5_mut_immut_references.rs:19:13 [INFO] [stdout] | [INFO] [stdout] 19 | let r1 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/chap4/5_mut_immut_references.rs:28:9 [INFO] [stdout] | [INFO] [stdout] 28 | let mut s = String::from("hello"); [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] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `new` [INFO] [stdout] --> src/bin/chap13/6_create_own_iter_samples.rs:6:8 [INFO] [stdout] | [INFO] [stdout] 6 | fn new() -> Counter { [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: unused doc comment [INFO] [stdout] --> src/bin/chap10/5_lifetime_generic_samples.rs:64:5 [INFO] [stdout] | [INFO] [stdout] 64 | / /** This won't compile, pp. 220 [INFO] [stdout] 65 | | let result; [INFO] [stdout] 66 | | { [INFO] [stdout] 67 | | let string2 = String::from("xyz"); [INFO] [stdout] ... | [INFO] [stdout] 70 | | println!("The longest string is {}", result); [INFO] [stdout] 71 | | */ [INFO] [stdout] | |______^ [INFO] [stdout] 72 | [INFO] [stdout] 73 | let string1 = String::from("abcd"); [INFO] [stdout] | ----------------------------------- rustdoc does not generate documentation for statements [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_doc_comments)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> src/bin/chap10/5_lifetime_generic_samples.rs:27:30 [INFO] [stdout] | [INFO] [stdout] 27 | fn longest_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: `string1` [INFO] [stdout] --> src/bin/chap10/5_lifetime_generic_samples.rs:63:9 [INFO] [stdout] | [INFO] [stdout] 63 | let string1 = String::from("long string is long"); [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_string1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `longest_x` [INFO] [stdout] --> src/bin/chap10/5_lifetime_generic_samples.rs:27:4 [INFO] [stdout] | [INFO] [stdout] 27 | fn longest_x<'a>(x: &'a str, y: &str) -> &'a str { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/bin/chap8/4_string_samples.rs:3:9 [INFO] [stdout] | [INFO] [stdout] 3 | let mut s = String::new(); [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: unused variable: `s` [INFO] [stdout] --> src/bin/chap8/4_string_samples.rs:6:9 [INFO] [stdout] | [INFO] [stdout] 6 | let s = data.to_string(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/bin/chap8/4_string_samples.rs:11:9 [INFO] [stdout] | [INFO] [stdout] 11 | let s = "initial contents".to_string(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/bin/chap8/4_string_samples.rs:13:9 [INFO] [stdout] | [INFO] [stdout] 13 | let s = String::from("initial contents"); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/chap8/4_string_samples.rs:18:9 [INFO] [stdout] | [INFO] [stdout] 18 | let hello = String::from("السلام علیكم"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/chap8/4_string_samples.rs:19:9 [INFO] [stdout] | [INFO] [stdout] 19 | let hello = String::from("Dobrý den"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/chap8/4_string_samples.rs:20:9 [INFO] [stdout] | [INFO] [stdout] 20 | let hello = String::from("Hello"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/chap8/4_string_samples.rs:21:9 [INFO] [stdout] | [INFO] [stdout] 21 | let hello = String::from("Здравствуйте"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/chap8/4_string_samples.rs:22:9 [INFO] [stdout] | [INFO] [stdout] 22 | let hello = String::from("Hola"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/chap8/4_string_samples.rs:3:9 [INFO] [stdout] | [INFO] [stdout] 3 | let mut s = String::new(); [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: 10 warnings emitted [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: unused variable: `list` [INFO] [stdout] --> src/bin/chap10/3_generic_trait_samples.rs:21:24 [INFO] [stdout] | [INFO] [stdout] 21 | fn largest_not_work(list: &[T]) -> T { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_list` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> src/bin/chap9/3_result_matching_samples.rs:43:9 [INFO] [stdout] | [INFO] [stdout] 43 | let f = File::open("hello2.txt") [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: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/chap8/2_vec_immut_ref.rs:4:9 [INFO] [stdout] | [INFO] [stdout] 4 | let mut v = vec![1, 2, 3, 4, 5]; [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: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `largest_not_work` [INFO] [stdout] --> src/bin/chap10/3_generic_trait_samples.rs:21:4 [INFO] [stdout] | [INFO] [stdout] 21 | fn largest_not_work(list: &[T]) -> T { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/chap8/2_vec_immut_ref.rs:4:9 [INFO] [stdout] | [INFO] [stdout] 4 | let mut v = vec![1, 2, 3, 4, 5]; [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: `v1` [INFO] [stdout] --> src/bin/chap13/2_closure_samples.rs:64:9 [INFO] [stdout] | [INFO] [stdout] 64 | let v1 = c.value(1); let v2 = c.value(2); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_v1` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused doc comment [INFO] [stdout] --> src/bin/chap10/5_lifetime_generic_samples.rs:64:5 [INFO] [stdout] | [INFO] [stdout] 64 | / /** This won't compile, pp. 220 [INFO] [stdout] 65 | | let result; [INFO] [stdout] 66 | | { [INFO] [stdout] 67 | | let string2 = String::from("xyz"); [INFO] [stdout] ... | [INFO] [stdout] 70 | | println!("The longest string is {}", result); [INFO] [stdout] 71 | | */ [INFO] [stdout] | |______^ [INFO] [stdout] 72 | [INFO] [stdout] 73 | let string1 = String::from("abcd"); [INFO] [stdout] | ----------------------------------- rustdoc does not generate documentation for statements [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_doc_comments)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> src/bin/chap10/5_lifetime_generic_samples.rs:27:30 [INFO] [stdout] | [INFO] [stdout] 27 | fn longest_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: `string1` [INFO] [stdout] --> src/bin/chap10/5_lifetime_generic_samples.rs:63:9 [INFO] [stdout] | [INFO] [stdout] 63 | let string1 = String::from("long string is long"); [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_string1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `longest_x` [INFO] [stdout] --> src/bin/chap10/5_lifetime_generic_samples.rs:27:4 [INFO] [stdout] | [INFO] [stdout] 27 | fn longest_x<'a>(x: &'a str, y: &str) -> &'a str { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `t` [INFO] [stdout] --> src/bin/chap10/2_trait_samples.rs:57:24 [INFO] [stdout] | [INFO] [stdout] 57 | fn some_function(t: &T, u: &U) -> i32 [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `u` [INFO] [stdout] --> src/bin/chap10/2_trait_samples.rs:57:31 [INFO] [stdout] | [INFO] [stdout] 57 | fn some_function(t: &T, u: &U) -> i32 [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_u` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `some_function` [INFO] [stdout] --> src/bin/chap10/2_trait_samples.rs:57:4 [INFO] [stdout] | [INFO] [stdout] 57 | fn some_function(t: &T, u: &U) -> i32 [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `some_string` [INFO] [stdout] --> src/bin/chap4/4_reference_borrowing.rs:28:17 [INFO] [stdout] | [INFO] [stdout] 28 | fn change_immut(some_string: &String) { [INFO] [stdout] | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_string` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `s2` is never read [INFO] [stdout] --> src/bin/chap4/1_variable_scope.rs:7:9 [INFO] [stdout] | [INFO] [stdout] 7 | let mut s2 = "hello world!"; [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: 1 warning emitted [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: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 12.05s [INFO] running `Command { std: "docker" "inspect" "103020c85e28e269a2aa1d931e05785fe175522e0200f037ac8edecad03cae7b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "103020c85e28e269a2aa1d931e05785fe175522e0200f037ac8edecad03cae7b", kill_on_drop: false }` [INFO] [stdout] 103020c85e28e269a2aa1d931e05785fe175522e0200f037ac8edecad03cae7b [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen", kill_on_drop: false }` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 776aac4cf4910edeb680eecf45429c291408a8f05e21ed10c9f5da4a1c6d0348 [INFO] running `Command { std: "docker" "start" "-a" "776aac4cf4910edeb680eecf45429c291408a8f05e21ed10c9f5da4a1c6d0348", kill_on_drop: false }` [INFO] [stderr] warning: unused variable: `order1` [INFO] [stderr] --> src/lib.rs:57:9 [INFO] [stderr] | [INFO] [stderr] 57 | let order1 = back_of_house::Appetizer::Soup; [INFO] [stderr] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_order1` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `order1` [INFO] [stderr] --> src/lib.rs:57:9 [INFO] [stderr] | [INFO] [stderr] 57 | let order1 = back_of_house::Appetizer::Soup; [INFO] [stderr] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_order1` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `order2` [INFO] [stderr] --> src/lib.rs:58:9 [INFO] [stderr] | [INFO] [stderr] 58 | let order2 = back_of_house::Appetizer::Salad; [INFO] [stderr] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_order2` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `order2` [INFO] [stderr] --> src/lib.rs:58:9 [INFO] [stderr] | [INFO] [stderr] 58 | let order2 = back_of_house::Appetizer::Salad; [INFO] [stderr] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_order2` [INFO] [stderr] [INFO] [stderr] warning: function is never used: `seat_at_table` [INFO] [stderr] --> src/front_of_house/hosting.rs:2:4 [INFO] [stderr] | [INFO] [stderr] 2 | fn seat_at_table() {} [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `seat_at_table` [INFO] [stderr] --> src/front_of_house/hosting.rs:2:4 [INFO] [stderr] | [INFO] [stderr] 2 | fn seat_at_table() {} [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `take_order` [INFO] [stderr] --> src/front_of_house.rs:4:8 [INFO] [stderr] | [INFO] [stderr] 4 | fn take_order() {} [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `take_order` [INFO] [stderr] --> src/front_of_house.rs:4:8 [INFO] [stderr] | [INFO] [stderr] 4 | fn take_order() {} [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `serve_order` [INFO] [stderr] --> src/front_of_house.rs:5:8 [INFO] [stderr] | [INFO] [stderr] 5 | fn serve_order() {} [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `serve_order` [INFO] [stderr] --> src/front_of_house.rs:5:8 [INFO] [stderr] | [INFO] [stderr] 5 | fn serve_order() {} [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `take_payment` [INFO] [stderr] --> src/front_of_house.rs:6:8 [INFO] [stderr] | [INFO] [stderr] 6 | fn take_payment() {} [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `serve_order` [INFO] [stderr] --> src/lib.rs:16:4 [INFO] [stderr] | [INFO] [stderr] 16 | fn serve_order() {} [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `take_payment` [INFO] [stderr] --> src/front_of_house.rs:6:8 [INFO] [stderr] | [INFO] [stderr] 6 | fn take_payment() {} [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: field is never read: `seasonal_fruit` [INFO] [stderr] --> src/lib.rs:21:9 [INFO] [stderr] | [INFO] [stderr] 21 | seasonal_fruit: String, [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `serve_order` [INFO] [stderr] --> src/lib.rs:16:4 [INFO] [stderr] | [INFO] [stderr] 16 | fn serve_order() {} [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `cook_order` [INFO] [stderr] --> src/lib.rs:33:8 [INFO] [stderr] | [INFO] [stderr] 33 | fn cook_order() {} [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: field is never read: `seasonal_fruit` [INFO] [stderr] --> src/lib.rs:21:9 [INFO] [stderr] | [INFO] [stderr] 21 | seasonal_fruit: String, [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `fix_incorrect_order` [INFO] [stderr] --> src/lib.rs:34:8 [INFO] [stderr] | [INFO] [stderr] 34 | fn fix_incorrect_order() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: 10 warnings emitted [INFO] [stderr] [INFO] [stderr] warning: function is never used: `cook_order` [INFO] [stderr] --> src/lib.rs:33:8 [INFO] [stderr] | [INFO] [stderr] 33 | fn cook_order() {} [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `fix_incorrect_order` [INFO] [stderr] --> src/lib.rs:34:8 [INFO] [stderr] | [INFO] [stderr] 34 | fn fix_incorrect_order() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: 10 warnings emitted [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/bin/chap8/2_vec_immut_ref.rs:4:9 [INFO] [stderr] | [INFO] [stderr] 4 | let mut v = vec![1, 2, 3, 4, 5]; [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 1 warning emitted [INFO] [stderr] [INFO] [stderr] warning: unused doc comment [INFO] [stderr] --> src/bin/chap10/5_lifetime_generic_samples.rs:64:5 [INFO] [stderr] | [INFO] [stderr] 64 | / /** This won't compile, pp. 220 [INFO] [stderr] 65 | | let result; [INFO] [stderr] 66 | | { [INFO] [stderr] 67 | | let string2 = String::from("xyz"); [INFO] [stderr] ... | [INFO] [stderr] 70 | | println!("The longest string is {}", result); [INFO] [stderr] 71 | | */ [INFO] [stderr] | |______^ [INFO] [stderr] 72 | [INFO] [stderr] 73 | let string1 = String::from("abcd"); [INFO] [stderr] | ----------------------------------- rustdoc does not generate documentation for statements [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_doc_comments)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/bin/chap10/5_lifetime_generic_samples.rs:27:30 [INFO] [stderr] | [INFO] [stderr] 27 | fn longest_x<'a>(x: &'a str, y: &str) -> &'a str { [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `string1` [INFO] [stderr] --> src/bin/chap10/5_lifetime_generic_samples.rs:63:9 [INFO] [stderr] | [INFO] [stderr] 63 | let string1 = String::from("long string is long"); [INFO] [stderr] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_string1` [INFO] [stderr] [INFO] [stderr] warning: function is never used: `longest_x` [INFO] [stderr] --> src/bin/chap10/5_lifetime_generic_samples.rs:27:4 [INFO] [stderr] | [INFO] [stderr] 27 | fn longest_x<'a>(x: &'a str, y: &str) -> &'a str { [INFO] [stderr] | ^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 4 warnings emitted [INFO] [stderr] [INFO] [stderr] warning: function is never used: `read_username_from_file` [INFO] [stderr] --> src/bin/chap9/4_propagating_error.rs:12:4 [INFO] [stderr] | [INFO] [stderr] 12 | fn read_username_from_file() -> Result { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `read_username_from_file2` [INFO] [stderr] --> src/bin/chap9/4_propagating_error.rs:29:4 [INFO] [stderr] | [INFO] [stderr] 29 | fn read_username_from_file2() -> Result { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `read_username_from_file3` [INFO] [stderr] --> src/bin/chap9/4_propagating_error.rs:38:4 [INFO] [stderr] | [INFO] [stderr] 38 | fn read_username_from_file3() -> Result { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: 3 warnings emitted [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `distance_from_origin` [INFO] [stderr] --> src/bin/chap10/1_generic_samples.rs:12:8 [INFO] [stderr] | [INFO] [stderr] 12 | fn distance_from_origin(&self) -> f32 { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 1 warning emitted [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s` [INFO] [stderr] --> src/bin/chap8/4_string_samples.rs:3:9 [INFO] [stderr] | [INFO] [stderr] 3 | let mut s = String::new(); [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s` [INFO] [stderr] --> src/bin/chap8/4_string_samples.rs:6:9 [INFO] [stderr] | [INFO] [stderr] 6 | let s = data.to_string(); [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s` [INFO] [stderr] --> src/bin/chap8/4_string_samples.rs:11:9 [INFO] [stderr] | [INFO] [stderr] 11 | let s = "initial contents".to_string(); [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s` [INFO] [stderr] --> src/bin/chap8/4_string_samples.rs:13:9 [INFO] [stderr] | [INFO] [stderr] 13 | let s = String::from("initial contents"); [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `hello` [INFO] [stderr] --> src/bin/chap8/4_string_samples.rs:18:9 [INFO] [stderr] | [INFO] [stderr] 18 | let hello = String::from("السلام علیكم"); [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `hello` [INFO] [stderr] --> src/bin/chap8/4_string_samples.rs:19:9 [INFO] [stderr] | [INFO] [stderr] 19 | let hello = String::from("Dobrý den"); [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `hello` [INFO] [stderr] --> src/bin/chap8/4_string_samples.rs:20:9 [INFO] [stderr] | [INFO] [stderr] 20 | let hello = String::from("Hello"); [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `hello` [INFO] [stderr] --> src/bin/chap8/4_string_samples.rs:21:9 [INFO] [stderr] | [INFO] [stderr] 21 | let hello = String::from("Здравствуйте"); [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `hello` [INFO] [stderr] --> src/bin/chap8/4_string_samples.rs:22:9 [INFO] [stderr] | [INFO] [stderr] 22 | let hello = String::from("Hola"); [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `new` [INFO] [stderr] --> src/bin/chap10/4_generic_trait_samples.rs:10:8 [INFO] [stderr] | [INFO] [stderr] 10 | fn new(x: T, y: T) -> Self { [INFO] [stderr] | ^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 1 warning emitted [INFO] [stderr] [INFO] [stderr] warning: unused doc comment [INFO] [stderr] --> src/bin/chap4/5_mut_immut_references.rs:6:5 [INFO] [stderr] | [INFO] [stderr] 6 | / /** [INFO] [stderr] 7 | | * you can have only one mutable reference [INFO] [stderr] 8 | | * to a particular piece of data in a particular scope [INFO] [stderr] 9 | | * [INFO] [stderr] 10 | | * Code below will fail [INFO] [stderr] 11 | | */ [INFO] [stderr] | |______^ rustdoc does not generate documentation for macro invocations [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_doc_comments)]` on by default [INFO] [stderr] = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion [INFO] [stderr] [INFO] [stderr] warning: unused variable: `r1` [INFO] [stderr] --> src/bin/chap4/5_mut_immut_references.rs:19:13 [INFO] [stderr] | [INFO] [stderr] 19 | let r1 = &mut s; [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/bin/chap4/5_mut_immut_references.rs:28:9 [INFO] [stderr] | [INFO] [stderr] 28 | let mut s = String::from("hello"); [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 3 warnings emitted [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/bin/chap8/4_string_samples.rs:3:9 [INFO] [stderr] | [INFO] [stderr] 3 | let mut s = String::new(); [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 10 warnings emitted [INFO] [stderr] [INFO] [stderr] warning: function is never used: `shoes_in_my_size` [INFO] [stderr] --> src/bin/chap13/5_closure_iter_samples.rs:9:4 [INFO] [stderr] | [INFO] [stderr] 9 | fn shoes_in_my_size(shoes: Vec, shoe_size: u32) -> Vec { [INFO] [stderr] | ^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 1 warning emitted [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s` [INFO] [stderr] --> src/bin/chap8/4_string_samples.rs:3:9 [INFO] [stderr] | [INFO] [stderr] 3 | let mut s = String::new(); [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s` [INFO] [stderr] --> src/bin/chap8/4_string_samples.rs:6:9 [INFO] [stderr] | [INFO] [stderr] 6 | let s = data.to_string(); [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s` [INFO] [stderr] --> src/bin/chap8/4_string_samples.rs:11:9 [INFO] [stderr] | [INFO] [stderr] 11 | let s = "initial contents".to_string(); [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s` [INFO] [stderr] --> src/bin/chap8/4_string_samples.rs:13:9 [INFO] [stderr] | [INFO] [stderr] 13 | let s = String::from("initial contents"); [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stderr] [INFO] [stderr] warning: unused doc comment [INFO] [stderr] --> src/bin/chap4/5_mut_immut_references.rs:6:5 [INFO] [stderr] | [INFO] [stderr] 6 | / /** [INFO] [stderr] 7 | | * you can have only one mutable reference [INFO] [stderr] 8 | | * to a particular piece of data in a particular scope [INFO] [stderr] 9 | | * [INFO] [stderr] 10 | | * Code below will fail [INFO] [stderr] 11 | | */ [INFO] [stderr] | |______^ rustdoc does not generate documentation for macro invocations [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_doc_comments)]` on by default [INFO] [stderr] = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion [INFO] [stderr] [INFO] [stderr] warning: unused variable: `hello` [INFO] [stderr] --> src/bin/chap8/4_string_samples.rs:18:9 [INFO] [stderr] | [INFO] [stderr] 18 | let hello = String::from("السلام علیكم"); [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `r1` [INFO] [stderr] --> src/bin/chap4/5_mut_immut_references.rs:19:13 [INFO] [stderr] | [INFO] [stderr] 19 | let r1 = &mut s; [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `hello` [INFO] [stderr] --> src/bin/chap8/4_string_samples.rs:19:9 [INFO] [stderr] | [INFO] [stderr] 19 | let hello = String::from("Dobrý den"); [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `hello` [INFO] [stderr] --> src/bin/chap8/4_string_samples.rs:20:9 [INFO] [stderr] | [INFO] [stderr] 20 | let hello = String::from("Hello"); [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/bin/chap4/5_mut_immut_references.rs:28:9 [INFO] [stderr] | [INFO] [stderr] 28 | let mut s = String::from("hello"); [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 3 warnings emitted [INFO] [stderr] [INFO] [stderr] warning: unused variable: `hello` [INFO] [stderr] --> src/bin/chap8/4_string_samples.rs:21:9 [INFO] [stderr] | [INFO] [stderr] 21 | let hello = String::from("Здравствуйте"); [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `hello` [INFO] [stderr] --> src/bin/chap8/4_string_samples.rs:22:9 [INFO] [stderr] | [INFO] [stderr] 22 | let hello = String::from("Hola"); [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/bin/chap8/4_string_samples.rs:3:9 [INFO] [stderr] | [INFO] [stderr] 3 | let mut s = String::new(); [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 10 warnings emitted [INFO] [stderr] [INFO] [stderr] warning: unused doc comment [INFO] [stderr] --> src/bin/chap10/5_lifetime_generic_samples.rs:64:5 [INFO] [stderr] | [INFO] [stderr] 64 | / /** This won't compile, pp. 220 [INFO] [stderr] 65 | | let result; [INFO] [stderr] 66 | | { [INFO] [stderr] 67 | | let string2 = String::from("xyz"); [INFO] [stderr] ... | [INFO] [stderr] 70 | | println!("The longest string is {}", result); [INFO] [stderr] 71 | | */ [INFO] [stderr] | |______^ [INFO] [stderr] 72 | [INFO] [stderr] 73 | let string1 = String::from("abcd"); [INFO] [stderr] | ----------------------------------- rustdoc does not generate documentation for statements [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_doc_comments)]` on by default [INFO] [stderr] [INFO] [stderr] warning: value assigned to `s2` is never read [INFO] [stderr] --> src/bin/chap4/1_variable_scope.rs:7:9 [INFO] [stderr] | [INFO] [stderr] 7 | let mut s2 = "hello world!"; [INFO] [stderr] | ^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_assignments)]` on by default [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: 1 warning emitted [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/bin/chap10/5_lifetime_generic_samples.rs:27:30 [INFO] [stderr] | [INFO] [stderr] 27 | fn longest_x<'a>(x: &'a str, y: &str) -> &'a str { [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `string1` [INFO] [stderr] --> src/bin/chap10/5_lifetime_generic_samples.rs:63:9 [INFO] [stderr] | [INFO] [stderr] 63 | let string1 = String::from("long string is long"); [INFO] [stderr] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_string1` [INFO] [stderr] [INFO] [stderr] warning: function is never used: `longest_x` [INFO] [stderr] --> src/bin/chap10/5_lifetime_generic_samples.rs:27:4 [INFO] [stderr] | [INFO] [stderr] 27 | fn longest_x<'a>(x: &'a str, y: &str) -> &'a str { [INFO] [stderr] | ^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 4 warnings emitted [INFO] [stderr] [INFO] [stderr] warning: unused variable: `f` [INFO] [stderr] --> src/bin/chap9/3_result_matching_samples.rs:43:9 [INFO] [stderr] | [INFO] [stderr] 43 | let f = File::open("hello2.txt") [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 1 warning emitted [INFO] [stderr] [INFO] [stderr] warning: unused variable: `list` [INFO] [stderr] --> src/bin/chap10/3_generic_trait_samples.rs:21:24 [INFO] [stderr] | [INFO] [stderr] 21 | fn largest_not_work(list: &[T]) -> T { [INFO] [stderr] | ^^^^ help: if this is intentional, prefix it with an underscore: `_list` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `largest_not_work` [INFO] [stderr] --> src/bin/chap10/3_generic_trait_samples.rs:21:4 [INFO] [stderr] | [INFO] [stderr] 21 | fn largest_not_work(list: &[T]) -> T { [INFO] [stderr] | ^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 2 warnings emitted [INFO] [stderr] [INFO] [stderr] warning: unused variable: `name` [INFO] [stderr] --> src/bin/chap11/1_test_samples.rs:9:18 [INFO] [stderr] | [INFO] [stderr] 9 | pub fn greeting2(name: &str) -> String { [INFO] [stderr] | ^^^^ help: if this is intentional, prefix it with an underscore: `_name` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: field is never read: `value` [INFO] [stderr] --> src/bin/chap11/1_test_samples.rs:14:5 [INFO] [stderr] | [INFO] [stderr] 14 | value: i32, [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: method `newB` should have a snake case name [INFO] [stderr] --> src/bin/chap11/1_test_samples.rs:24:12 [INFO] [stderr] | [INFO] [stderr] 24 | pub fn newB(value: i32) -> Guess { [INFO] [stderr] | ^^^^ help: convert the identifier to snake case: `new_b` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(non_snake_case)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 3 warnings emitted [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `new` [INFO] [stderr] --> src/bin/chap13/6_create_own_iter_samples.rs:6:8 [INFO] [stderr] | [INFO] [stderr] 6 | fn new() -> Counter { [INFO] [stderr] | ^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 1 warning emitted [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/bin/chap8/2_vec_immut_ref.rs:4:9 [INFO] [stderr] | [INFO] [stderr] 4 | let mut v = vec![1, 2, 3, 4, 5]; [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 1 warning emitted [INFO] [stderr] [INFO] [stderr] warning: unused variable: `v1` [INFO] [stderr] --> src/bin/chap13/2_closure_samples.rs:64:9 [INFO] [stderr] | [INFO] [stderr] 64 | let v1 = c.value(1); let v2 = c.value(2); [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_v1` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 1 warning emitted [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `new` [INFO] [stderr] --> src/bin/chap10/4_generic_trait_samples.rs:10:8 [INFO] [stderr] | [INFO] [stderr] 10 | fn new(x: T, y: T) -> Self { [INFO] [stderr] | ^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 1 warning emitted [INFO] [stderr] [INFO] [stderr] warning: unused variable: `some_string` [INFO] [stderr] --> src/bin/chap4/4_reference_borrowing.rs:28:17 [INFO] [stderr] | [INFO] [stderr] 28 | fn change_immut(some_string: &String) { [INFO] [stderr] | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_string` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 1 warning emitted [INFO] [stderr] [INFO] [stderr] warning: unused variable: `word` [INFO] [stderr] --> src/bin/chap4/7_string_slices.rs:3:9 [INFO] [stderr] | [INFO] [stderr] 3 | let word = first_word(&s); // word will get the value 5 [INFO] [stderr] | ^^^^ help: if this is intentional, prefix it with an underscore: `_word` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 1 warning emitted [INFO] [stderr] [INFO] [stderr] warning: unused variable: `some_string` [INFO] [stderr] --> src/bin/chap4/4_reference_borrowing.rs:28:17 [INFO] [stderr] | [INFO] [stderr] 28 | fn change_immut(some_string: &String) { [INFO] [stderr] | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_string` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 1 warning emitted [INFO] [stderr] [INFO] [stderr] warning: unused variable: `list` [INFO] [stderr] --> src/bin/chap10/3_generic_trait_samples.rs:21:24 [INFO] [stderr] | [INFO] [stderr] 21 | fn largest_not_work(list: &[T]) -> T { [INFO] [stderr] | ^^^^ help: if this is intentional, prefix it with an underscore: `_list` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `largest_not_work` [INFO] [stderr] --> src/bin/chap10/3_generic_trait_samples.rs:21:4 [INFO] [stderr] | [INFO] [stderr] 21 | fn largest_not_work(list: &[T]) -> T { [INFO] [stderr] | ^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 2 warnings emitted [INFO] [stderr] [INFO] [stderr] warning: unused variable: `f` [INFO] [stderr] --> src/bin/chap9/3_result_matching_samples.rs:43:9 [INFO] [stderr] | [INFO] [stderr] 43 | let f = File::open("hello2.txt") [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 1 warning emitted [INFO] [stderr] [INFO] [stderr] warning: unused variable: `t` [INFO] [stderr] --> src/bin/chap10/2_trait_samples.rs:57:24 [INFO] [stderr] | [INFO] [stderr] 57 | fn some_function(t: &T, u: &U) -> i32 [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `u` [INFO] [stderr] --> src/bin/chap10/2_trait_samples.rs:57:31 [INFO] [stderr] | [INFO] [stderr] 57 | fn some_function(t: &T, u: &U) -> i32 [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_u` [INFO] [stderr] [INFO] [stderr] warning: function is never used: `some_function` [INFO] [stderr] --> src/bin/chap10/2_trait_samples.rs:57:4 [INFO] [stderr] | [INFO] [stderr] 57 | fn some_function(t: &T, u: &U) -> i32 [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 3 warnings emitted [INFO] [stderr] [INFO] [stderr] warning: function is never used: `read_username_from_file` [INFO] [stderr] --> src/bin/chap9/4_propagating_error.rs:12:4 [INFO] [stderr] | [INFO] [stderr] 12 | fn read_username_from_file() -> Result { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `read_username_from_file2` [INFO] [stderr] --> src/bin/chap9/4_propagating_error.rs:29:4 [INFO] [stderr] | [INFO] [stderr] 29 | fn read_username_from_file2() -> Result { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `read_username_from_file3` [INFO] [stderr] --> src/bin/chap9/4_propagating_error.rs:38:4 [INFO] [stderr] | [INFO] [stderr] 38 | fn read_username_from_file3() -> Result { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: 3 warnings emitted [INFO] [stderr] [INFO] [stderr] warning: value assigned to `s2` is never read [INFO] [stderr] --> src/bin/chap4/1_variable_scope.rs:7:9 [INFO] [stderr] | [INFO] [stderr] 7 | let mut s2 = "hello world!"; [INFO] [stderr] | ^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_assignments)]` on by default [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: 1 warning emitted [INFO] [stderr] [INFO] [stderr] warning: unused variable: `f` [INFO] [stderr] --> src/bin/chap9/2_result_recoverable_samples.rs:5:9 [INFO] [stderr] | [INFO] [stderr] 5 | let f = match f { [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 1 warning emitted [INFO] [stderr] [INFO] [stderr] warning: unused variable: `f` [INFO] [stderr] --> src/bin/chap9/2_result_recoverable_samples.rs:5:9 [INFO] [stderr] | [INFO] [stderr] 5 | let f = match f { [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 1 warning emitted [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `distance_from_origin` [INFO] [stderr] --> src/bin/chap10/1_generic_samples.rs:12:8 [INFO] [stderr] | [INFO] [stderr] 12 | fn distance_from_origin(&self) -> f32 { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 1 warning emitted [INFO] [stderr] [INFO] [stderr] warning: unused variable: `name` [INFO] [stderr] --> src/bin/chap11/1_test_samples.rs:9:18 [INFO] [stderr] | [INFO] [stderr] 9 | pub fn greeting2(name: &str) -> String { [INFO] [stderr] | ^^^^ help: if this is intentional, prefix it with an underscore: `_name` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: field is never read: `value` [INFO] [stderr] --> src/bin/chap11/1_test_samples.rs:14:5 [INFO] [stderr] | [INFO] [stderr] 14 | value: i32, [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: method `newB` should have a snake case name [INFO] [stderr] --> src/bin/chap11/1_test_samples.rs:24:12 [INFO] [stderr] | [INFO] [stderr] 24 | pub fn newB(value: i32) -> Guess { [INFO] [stderr] | ^^^^ help: convert the identifier to snake case: `new_b` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(non_snake_case)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function `greater_than_100B` should have a snake case name [INFO] [stderr] --> src/bin/chap11/1_test_samples.rs:81:8 [INFO] [stderr] | [INFO] [stderr] 81 | fn greater_than_100B() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `greater_than_100_b` [INFO] [stderr] [INFO] [stderr] warning: 4 warnings emitted [INFO] [stderr] [INFO] [stderr] warning: unused variable: `t` [INFO] [stderr] --> src/bin/chap10/2_trait_samples.rs:57:24 [INFO] [stderr] | [INFO] [stderr] 57 | fn some_function(t: &T, u: &U) -> i32 [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `u` [INFO] [stderr] --> src/bin/chap10/2_trait_samples.rs:57:31 [INFO] [stderr] | [INFO] [stderr] 57 | fn some_function(t: &T, u: &U) -> i32 [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_u` [INFO] [stderr] [INFO] [stderr] warning: function is never used: `some_function` [INFO] [stderr] --> src/bin/chap10/2_trait_samples.rs:57:4 [INFO] [stderr] | [INFO] [stderr] 57 | fn some_function(t: &T, u: &U) -> i32 [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 3 warnings emitted [INFO] [stderr] [INFO] [stderr] warning: unused variable: `word` [INFO] [stderr] --> src/bin/chap4/7_string_slices.rs:3:9 [INFO] [stderr] | [INFO] [stderr] 3 | let word = first_word(&s); // word will get the value 5 [INFO] [stderr] | ^^^^ help: if this is intentional, prefix it with an underscore: `_word` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 1 warning emitted [INFO] [stderr] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.09s [INFO] [stderr] Running /opt/rustwide/target/debug/deps/rust_prog_lang-24e864b3ff7cffad [INFO] [stdout] [INFO] [stdout] running 1 test [INFO] [stdout] test front_of_house::adder::tests::internal ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out [INFO] [stdout] [INFO] [stderr] Running /opt/rustwide/target/debug/deps/1_closure_samples-40e3be9e4f061cb4 [INFO] [stdout] [INFO] [stderr] Running /opt/rustwide/target/debug/deps/1_enum_sample-80e974c7b126a87d [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stderr] Running /opt/rustwide/target/debug/deps/1_generic_samples-82fb2c1bd595e8a4 [INFO] [stdout] [INFO] [stderr] Running /opt/rustwide/target/debug/deps/1_panic_samples-27021b2f52bbbe64 [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out [INFO] [stderr] Running /opt/rustwide/target/debug/deps/1_struct_sample-27079b43b570146f [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out [INFO] [stdout] [INFO] [stderr] Running /opt/rustwide/target/debug/deps/1_test_samples-ea89000d7b8529f7 [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] running 6 tests [INFO] [stdout] test tests::it_works ... ok [INFO] [stdout] test tests::greeting_contains_name2 ... ok [INFO] [stdout] test tests::it_adds_two ... ok [INFO] [stdout] test tests::greeting_contains_name ... ok [INFO] [stdout] test tests::greater_than_100B ... ok [INFO] [stdout] test tests::greater_than_100 ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out [INFO] [stdout] [INFO] [stderr] Running /opt/rustwide/target/debug/deps/1_variable_scope-f93944795214e1b1 [INFO] [stdout] [INFO] [stderr] Running /opt/rustwide/target/debug/deps/1_vec_sample-0221bdf29fa0c0c2 [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out [INFO] [stdout] [INFO] [stderr] Running /opt/rustwide/target/debug/deps/2_closure_samples-d48b283fb431be89 [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] running 1 test [INFO] [stdout] test call_with_different_values ... FAILED [INFO] [stdout] [INFO] [stdout] failures: [INFO] [stdout] [INFO] [stdout] ---- call_with_different_values stdout ---- [INFO] [stdout] thread 'call_with_different_values' panicked at 'assertion failed: `(left == right)` [INFO] [stdout] left: `1`, [INFO] [stdout] right: `2`', src/bin/chap13/2_closure_samples.rs:65:5 [INFO] [stdout] stack backtrace: [INFO] [stdout] 0: 0x558f57b83225 - backtrace::backtrace::libunwind::trace::h5e2646fa3eddf2ea [INFO] [stdout] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86 [INFO] [stdout] 1: 0x558f57b83225 - backtrace::backtrace::trace_unsynchronized::hb95dd7f77ce47877 [INFO] [stdout] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66 [INFO] [stdout] 2: 0x558f57b83225 - std::sys_common::backtrace::_print_fmt::h5e71b67af43fd70d [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:78 [INFO] [stdout] 3: 0x558f57b83225 - ::fmt::hdb4a83d2b61107e5 [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:59 [INFO] [stdout] 4: 0x558f57baae0c - core::fmt::write::ha20e7262fa3e8a7a [INFO] [stdout] at src/libcore/fmt/mod.rs:1076 [INFO] [stdout] 5: 0x558f57b37d95 - std::io::Write::write_fmt::hd8ff364c7845d2d0 [INFO] [stdout] at /rustc/6f959902b3103c49ca981fbc01871589c3498489/src/libstd/io/mod.rs:1537 [INFO] [stdout] 6: 0x558f57b7d8f1 - std::io::impls::>::write_fmt::h1c057ef6e8762996 [INFO] [stdout] at src/libstd/io/impls.rs:176 [INFO] [stdout] 7: 0x558f57b85900 - std::sys_common::backtrace::_print::h9c07314cc66ba539 [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:62 [INFO] [stdout] 8: 0x558f57b85900 - std::sys_common::backtrace::print::hd1fd65f49a2d8544 [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:49 [INFO] [stdout] 9: 0x558f57b85900 - std::panicking::default_hook::{{closure}}::h222da46485ab36fc [INFO] [stdout] at src/libstd/panicking.rs:198 [INFO] [stdout] 10: 0x558f57b855fa - std::panicking::default_hook::hc5868949d129ed00 [INFO] [stdout] at src/libstd/panicking.rs:214 [INFO] [stdout] 11: 0x558f57b85f43 - std::panicking::rust_panic_with_hook::h26a6ab8b0993c0c8 [INFO] [stdout] at src/libstd/panicking.rs:526 [INFO] [stdout] 12: 0x558f57b85b3b - rust_begin_unwind [INFO] [stdout] at src/libstd/panicking.rs:437 [INFO] [stdout] 13: 0x558f57b85aab - std::panicking::begin_panic_fmt::h2ff295231415d4a6 [INFO] [stdout] at src/libstd/panicking.rs:391 [INFO] [stdout] 14: 0x558f57b36c38 - _2_closure_samples::call_with_different_values::hf4ade6d6e39bc56a [INFO] [stdout] at src/bin/chap13/2_closure_samples.rs:65 [INFO] [stdout] 15: 0x558f57b36a7a - _2_closure_samples::call_with_different_values::{{closure}}::h1179e2fab43b4e23 [INFO] [stdout] at src/bin/chap13/2_closure_samples.rs:62 [INFO] [stdout] 16: 0x558f57b3693e - core::ops::function::FnOnce::call_once::h0dfc10546947bc6a [INFO] [stdout] at /rustc/6f959902b3103c49ca981fbc01871589c3498489/src/libcore/ops/function.rs:233 [INFO] [stdout] 17: 0x558f57b5f30c - as core::ops::function::FnOnce>::call_once::h42148c33ed88c979 [INFO] [stdout] at /rustc/6f959902b3103c49ca981fbc01871589c3498489/src/liballoc/boxed.rs:1081 [INFO] [stdout] 18: 0x558f57b5f30c - as core::ops::function::FnOnce<()>>::call_once::h759dc0b09d774665 [INFO] [stdout] at /rustc/6f959902b3103c49ca981fbc01871589c3498489/src/libstd/panic.rs:318 [INFO] [stdout] 19: 0x558f57b5f30c - std::panicking::try::do_call::h676ad1fc9e9badea [INFO] [stdout] at /rustc/6f959902b3103c49ca981fbc01871589c3498489/src/libstd/panicking.rs:348 [INFO] [stdout] 20: 0x558f57b5f30c - std::panicking::try::hee36a8727a3050b0 [INFO] [stdout] at /rustc/6f959902b3103c49ca981fbc01871589c3498489/src/libstd/panicking.rs:325 [INFO] [stdout] 21: 0x558f57b5f30c - std::panic::catch_unwind::hd5d426ebd89b2542 [INFO] [stdout] at /rustc/6f959902b3103c49ca981fbc01871589c3498489/src/libstd/panic.rs:394 [INFO] [stdout] 22: 0x558f57b5f30c - test::run_test_in_process::h8dacdba4dc4cbaa5 [INFO] [stdout] at src/libtest/lib.rs:541 [INFO] [stdout] 23: 0x558f57b5f30c - test::run_test::run_test_inner::{{closure}}::hf93754afad6be40f [INFO] [stdout] at src/libtest/lib.rs:450 [INFO] [stdout] 24: 0x558f57b37286 - std::sys_common::backtrace::__rust_begin_short_backtrace::h2c69fab544a90730 [INFO] [stdout] at /rustc/6f959902b3103c49ca981fbc01871589c3498489/src/libstd/sys_common/backtrace.rs:130 [INFO] [stdout] 25: 0x558f57b3c315 - std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}::hcf302fafa60d80f2 [INFO] [stdout] at /rustc/6f959902b3103c49ca981fbc01871589c3498489/src/libstd/thread/mod.rs:475 [INFO] [stdout] 26: 0x558f57b3c315 - as core::ops::function::FnOnce<()>>::call_once::h39ede710608e817e [INFO] [stdout] at /rustc/6f959902b3103c49ca981fbc01871589c3498489/src/libstd/panic.rs:318 [INFO] [stdout] 27: 0x558f57b3c315 - std::panicking::try::do_call::hec0b4d2faa46fbf7 [INFO] [stdout] at /rustc/6f959902b3103c49ca981fbc01871589c3498489/src/libstd/panicking.rs:348 [INFO] [stdout] 28: 0x558f57b3c315 - std::panicking::try::h0144ba3f2539803d [INFO] [stdout] at /rustc/6f959902b3103c49ca981fbc01871589c3498489/src/libstd/panicking.rs:325 [INFO] [stdout] 29: 0x558f57b3c315 - std::panic::catch_unwind::ha03e59eb589f857b [INFO] [stdout] at /rustc/6f959902b3103c49ca981fbc01871589c3498489/src/libstd/panic.rs:394 [INFO] [stdout] 30: 0x558f57b3c315 - std::thread::Builder::spawn_unchecked::{{closure}}::hdeba34620a4a7a44 [INFO] [stdout] at /rustc/6f959902b3103c49ca981fbc01871589c3498489/src/libstd/thread/mod.rs:474 [INFO] [stdout] 31: 0x558f57b3c315 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h552693dbb801eadd [INFO] [stdout] at /rustc/6f959902b3103c49ca981fbc01871589c3498489/src/libcore/ops/function.rs:233 [INFO] [stdout] 32: 0x558f57b8c10a - as core::ops::function::FnOnce>::call_once::h61c24496ae624ac5 [INFO] [stdout] at /rustc/6f959902b3103c49ca981fbc01871589c3498489/src/liballoc/boxed.rs:1081 [INFO] [stdout] 33: 0x558f57b8c10a - as core::ops::function::FnOnce>::call_once::h89548957afa14049 [INFO] [stdout] at /rustc/6f959902b3103c49ca981fbc01871589c3498489/src/liballoc/boxed.rs:1081 [INFO] [stdout] 34: 0x558f57b8c10a - std::sys::unix::thread::Thread::new::thread_start::h73903fbbff5b990e [INFO] [stdout] at src/libstd/sys/unix/thread.rs:87 [INFO] [stdout] 35: 0x7fbeb38b4609 - start_thread [INFO] [stdout] 36: 0x7fbeb37c0103 - __clone [INFO] [stdout] 37: 0x0 - [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] failures: [INFO] [stdout] call_with_different_values [INFO] [stdout] [INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out [INFO] [stdout] [INFO] [stderr] error: test failed, to rerun pass '--bin 2_closure_samples' [INFO] running `Command { std: "docker" "inspect" "776aac4cf4910edeb680eecf45429c291408a8f05e21ed10c9f5da4a1c6d0348", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "776aac4cf4910edeb680eecf45429c291408a8f05e21ed10c9f5da4a1c6d0348", kill_on_drop: false }` [INFO] [stdout] 776aac4cf4910edeb680eecf45429c291408a8f05e21ed10c9f5da4a1c6d0348