[INFO] fetching crate guessing_game_viggin 0.1.0...
[INFO] testing guessing_game_viggin-0.1.0 against 1.54.0 for beta-1.55-1
[INFO] extracting crate guessing_game_viggin 0.1.0 into /workspace/builds/worker-20/source
[INFO] validating manifest of crates.io crate guessing_game_viggin 0.1.0 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate guessing_game_viggin 0.1.0
[INFO] finished tweaking crates.io crate guessing_game_viggin 0.1.0
[INFO] tweaked toml for crates.io crate guessing_game_viggin 0.1.0 written to /workspace/builds/worker-20/source/Cargo.toml
[INFO] crate crates.io crate guessing_game_viggin 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ab7fd66e36747a9056d0a5d4039920291454faf93481109d4026820bfb830b28
[INFO] running `Command { std: "docker" "start" "-a" "ab7fd66e36747a9056d0a5d4039920291454faf93481109d4026820bfb830b28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ab7fd66e36747a9056d0a5d4039920291454faf93481109d4026820bfb830b28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab7fd66e36747a9056d0a5d4039920291454faf93481109d4026820bfb830b28", kill_on_drop: false }`
[INFO] [stdout] ab7fd66e36747a9056d0a5d4039920291454faf93481109d4026820bfb830b28
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 43113e80f8652039989a862220cd66a256d9e7400e11c5c9ca93bb04e8ce4cf5
[INFO] running `Command { std: "docker" "start" "-a" "43113e80f8652039989a862220cd66a256d9e7400e11c5c9ca93bb04e8ce4cf5", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling proc-macro2 v1.0.8
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]    Compiling slab v0.4.2
[INFO] [stderr]    Compiling memchr v2.3.2
[INFO] [stderr]    Compiling futures-core v0.3.4
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]    Compiling cc v1.0.50
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling proc-macro-nested v0.1.3
[INFO] [stderr]    Compiling futures-sink v0.3.4
[INFO] [stderr]    Compiling bytes v0.5.4
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling itoa v0.4.5
[INFO] [stderr]    Compiling arc-swap v0.4.4
[INFO] [stderr]    Compiling futures-task v0.3.4
[INFO] [stderr]    Compiling pin-project-lite v0.1.4
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling pin-utils v0.1.0-alpha.4
[INFO] [stderr]    Compiling futures-io v0.3.4
[INFO] [stderr]    Compiling openssl v0.10.28
[INFO] [stderr]    Compiling smallvec v1.2.0
[INFO] [stderr]    Compiling native-tls v0.2.3
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]    Compiling openssl-probe v0.1.2
[INFO] [stderr]    Compiling ryu v1.0.2
[INFO] [stderr]    Compiling try-lock v0.2.2
[INFO] [stderr]    Compiling tower-service v0.3.0
[INFO] [stderr]    Compiling encoding_rs v0.8.22
[INFO] [stderr]    Compiling mime v0.3.16
[INFO] [stderr]    Compiling dtoa v0.4.5
[INFO] [stderr]    Compiling base64 v0.11.0
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]    Compiling indexmap v1.3.2
[INFO] [stderr]    Compiling unicode-bidi v0.3.4
[INFO] [stderr]    Compiling want v0.3.0
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling unicode-normalization v0.1.12
[INFO] [stderr]    Compiling futures-channel v0.3.4
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling http v0.2.0
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling idna v0.2.0
[INFO] [stderr]    Compiling openssl-sys v0.9.54
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling signal-hook-registry v1.2.0
[INFO] [stderr]    Compiling num_cpus v1.12.0
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling url v2.1.1
[INFO] [stderr]    Compiling mime_guess v2.0.1
[INFO] [stderr]    Compiling mio v0.6.21
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling http-body v0.3.1
[INFO] [stderr]    Compiling serde_json v1.0.48
[INFO] [stderr]    Compiling serde_urlencoded v0.6.1
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling tokio-macros v0.2.4
[INFO] [stderr]    Compiling pin-project-internal v0.4.8
[INFO] [stderr]    Compiling tokio v0.2.11
[INFO] [stderr]    Compiling futures-macro v0.3.4
[INFO] [stderr]    Compiling pin-project v0.4.8
[INFO] [stderr]    Compiling futures-util v0.3.4
[INFO] [stderr]    Compiling tokio-util v0.2.0
[INFO] [stderr]    Compiling tokio-tls v0.3.0
[INFO] [stderr]    Compiling h2 v0.2.1
[INFO] [stderr]    Compiling futures-executor v0.3.4
[INFO] [stderr]    Compiling futures v0.3.4
[INFO] [stderr]    Compiling hyper v0.13.2
[INFO] [stderr]    Compiling hyper-tls v0.4.1
[INFO] [stderr]    Compiling reqwest v0.10.1
[INFO] [stderr]    Compiling guessing_game_viggin v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::str::FromStr`
[INFO] [stdout]  --> src/lib/config.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::str::FromStr;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]   --> src/lib/config.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let args: Vec<String> = env::args().collect();
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c1`
[INFO] [stdout]   --> src/lib/pub_use.rs:31:16
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor {
[INFO] [stdout]    |                ^^ help: if this is intentional, prefix it with an underscore: `_c1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c2`
[INFO] [stdout]   --> src/lib/pub_use.rs:31:34
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor {
[INFO] [stdout]    |                                  ^^ help: if this is intentional, prefix it with an underscore: `_c2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::env`
[INFO] [stdout]  --> src/bin/minigrep/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::env;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `meta`
[INFO] [stdout]   --> src/bin/errors/errors.rs:31:15
[INFO] [stdout]    |
[INFO] [stdout] 31 |     if let Ok(meta) = f.metadata() {
[INFO] [stdout]    |               ^^^^ help: if this is intentional, prefix it with an underscore: `_meta`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/bin/collections/main.rs:89:6
[INFO] [stdout]    |
[INFO] [stdout] 89 |     };
[INFO] [stdout]    |      ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `can_hold`
[INFO] [stdout]   --> src/bin/tests/main.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/bin/closures/main.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let x = 4;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[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/closures/iterators.rs:61:4
[INFO] [stdout]    |
[INFO] [stdout] 61 | fn shoes_in_my_size(shoes: Vec<Shoe>, shoe_size: u32) -> Vec<Shoe> {
[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/closures/iterators.rs:92:8
[INFO] [stdout]    |
[INFO] [stdout] 92 |     fn new() -> Counter {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `simulated_expensive_calculation`
[INFO] [stdout]  --> src/bin/closures/main.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn simulated_expensive_calculation(intensity: u32) -> u32 {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `inner_func`
[INFO] [stdout]   --> src/bin/closures/main.rs:31:4
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn inner_func(){
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `DA`
[INFO] [stdout]   --> src/bin/enums/main.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | struct DA {
[INFO] [stdout]    |        ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word_count`
[INFO] [stdout]   --> src/bin/hash/main.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |     let word_count : HashMap<_,_> = v.iter()
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_word_count`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/bin/collections/main.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let v: Vec<u128> = Vec::new();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[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/collections/main.rs:71:5
[INFO] [stdout]    |
[INFO] [stdout] 71 |     s2 = String::from("xxx");
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/errors/errors.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     read_username_from_file_v2();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/errors/errors.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     read_username_from_file_v3();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/errors/errors.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         fs::remove_file("hello.txt");
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/collections/main.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     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: `t`
[INFO] [stdout]   --> src/bin/generics/traits.rs:71:56
[INFO] [stdout]    |
[INFO] [stdout] 71 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {3}
[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/generics/traits.rs:71:62
[INFO] [stdout]    |
[INFO] [stdout] 71 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {3}
[INFO] [stdout]    |                                                              ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/bin/generics/traits.rs:72:35
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn some_function_with_where<T, U>(t: T, u: U) -> i32
[INFO] [stdout]    |                                   ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]   --> src/bin/generics/traits.rs:72:41
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn some_function_with_where<T, U>(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: associated function is never used: `era`
[INFO] [stdout]  --> src/bin/guessing_game/rect.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pub fn era(&self) -> u32 {
[INFO] [stdout]   |            ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `print_x`
[INFO] [stdout]   --> src/bin/guessing_game/rect.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn print_x(&self , format: &str) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/collections/main.rs:82:9
[INFO] [stdout]    |
[INFO] [stdout] 82 |     let mut sss = SSS {
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `zzip`
[INFO] [stdout]   --> src/bin/hash/main.rs:60:4
[INFO] [stdout]    |
[INFO] [stdout] 60 | fn zzip(v : &Vec<u8>){
[INFO] [stdout]    |    ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `accessing`
[INFO] [stdout]   --> src/bin/collections/main.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn accessing() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `no_mutable_and_imutable_in_same_scope`
[INFO] [stdout]   --> src/bin/collections/main.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn no_mutable_and_imutable_in_same_scope() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `edit_in_place`
[INFO] [stdout]   --> src/bin/collections/main.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn edit_in_place() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `enum_vec`
[INFO] [stdout]   --> src/bin/collections/main.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn enum_vec() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `stringss`
[INFO] [stdout]   --> src/bin/collections/main.rs:60:4
[INFO] [stdout]    |
[INFO] [stdout] 60 | fn stringss() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `vec_of_stracts`
[INFO] [stdout]   --> src/bin/collections/main.rs:75:4
[INFO] [stdout]    |
[INFO] [stdout] 75 | fn vec_of_stracts() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `update_entry_in_a_map`
[INFO] [stdout]   --> src/bin/collections/main.rs:97:4
[INFO] [stdout]    |
[INFO] [stdout] 97 | fn update_entry_in_a_map() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `Id` should have a snake case name
[INFO] [stdout]   --> src/bin/collections/main.rs:78:9
[INFO] [stdout]    |
[INFO] [stdout] 78 |         Id: String,
[INFO] [stdout]    |         ^^ help: convert the identifier to snake case (notice the capitalization): `id`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `notifyBound`
[INFO] [stdout]   --> src/bin/generics/traits.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | pub fn notifyBound<T: Summary>(item: T) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `notifyPlusSyntax`
[INFO] [stdout]   --> src/bin/generics/traits.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub fn notifyPlusSyntax(item: impl Summary + Display) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `notifyWow`
[INFO] [stdout]   --> src/bin/generics/traits.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 67 | pub fn notifyWow<T: Summary + Display>(item: T) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `some_function`
[INFO] [stdout]   --> src/bin/generics/traits.rs:71:4
[INFO] [stdout]    |
[INFO] [stdout] 71 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {3}
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `some_function_with_where`
[INFO] [stdout]   --> src/bin/generics/traits.rs:72:4
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn some_function_with_where<T, U>(t: T, u: U) -> i32
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `returns_summarizable`
[INFO] [stdout]   --> src/bin/generics/traits.rs:78:4
[INFO] [stdout]    |
[INFO] [stdout] 78 | fn returns_summarizable() -> impl Summary {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `largest_copy`
[INFO] [stdout]   --> src/bin/generics/traits.rs:88:4
[INFO] [stdout]    |
[INFO] [stdout] 88 | fn largest_copy<T: PartialOrd + Copy>(list: &[T]) -> T {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `largest_clone`
[INFO] [stdout]    --> src/bin/generics/traits.rs:100:4
[INFO] [stdout]     |
[INFO] [stdout] 100 | fn largest_clone<T>(list: &[T]) -> T
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `largest_ref`
[INFO] [stdout]    --> src/bin/generics/traits.rs:113:4
[INFO] [stdout]     |
[INFO] [stdout] 113 | fn largest_ref<T: PartialOrd>(list: &[T]) -> &T {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Pair`
[INFO] [stdout]    --> src/bin/generics/traits.rs:123:8
[INFO] [stdout]     |
[INFO] [stdout] 123 | struct Pair<T>{
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `cmp_display`
[INFO] [stdout]    --> src/bin/generics/traits.rs:129:8
[INFO] [stdout]     |
[INFO] [stdout] 129 |     fn cmp_display(&self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_this_an_extension_function`
[INFO] [stdout]    --> src/bin/generics/traits.rs:154:4
[INFO] [stdout]     |
[INFO] [stdout] 154 | fn is_this_an_extension_function(){
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `longest_with_an_announcement`
[INFO] [stdout]   --> src/bin/generics/lifetimes.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn longest_with_an_announcement<'a, T>(x: &'a str, y: &'a str, ann: T) -> &'a str
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `take_ownership`
[INFO] [stdout]   --> src/bin/generics/main.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn take_ownership(t: Tweet){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notifyBound` should have a snake case name
[INFO] [stdout]   --> src/bin/generics/traits.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | pub fn notifyBound<T: Summary>(item: T) {
[INFO] [stdout]    |        ^^^^^^^^^^^ help: convert the identifier to snake case: `notify_bound`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notifyPlusSyntax` should have a snake case name
[INFO] [stdout]   --> src/bin/generics/traits.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub fn notifyPlusSyntax(item: impl Summary + Display) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `notify_plus_syntax`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notifyWow` should have a snake case name
[INFO] [stdout]   --> src/bin/generics/traits.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 67 | pub fn notifyWow<T: Summary + Display>(item: T) {
[INFO] [stdout]    |        ^^^^^^^^^ help: convert the identifier to snake case: `notify_wow`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `resp`
[INFO] [stdout]   --> src/bin/http_async/main.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let resp = reqwest::get("https://httpbin.org/ip")
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_resp`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_username_from_file`
[INFO] [stdout]   --> src/bin/http_async/main.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn read_username_from_file() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 21 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings 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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 42.26s
[INFO] running `Command { std: "docker" "inspect" "43113e80f8652039989a862220cd66a256d9e7400e11c5c9ca93bb04e8ce4cf5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43113e80f8652039989a862220cd66a256d9e7400e11c5c9ca93bb04e8ce4cf5", kill_on_drop: false }`
[INFO] [stdout] 43113e80f8652039989a862220cd66a256d9e7400e11c5c9ca93bb04e8ce4cf5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a0badc694b844c92c4152c806bce82519e8fb2e30ed2815f6504296af39be8f6
[INFO] running `Command { std: "docker" "start" "-a" "a0badc694b844c92c4152c806bce82519e8fb2e30ed2815f6504296af39be8f6", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] warning: unused import: `std::str::FromStr`
[INFO] [stdout]  --> src/lib/config.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::str::FromStr;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]   --> src/lib/config.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let args: Vec<String> = env::args().collect();
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c1`
[INFO] [stdout]   --> src/lib/pub_use.rs:31:16
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor {
[INFO] [stdout]    |                ^^ help: if this is intentional, prefix it with an underscore: `_c1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling guessing_game_viggin v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `c2`
[INFO] [stdout]   --> src/lib/pub_use.rs:31:34
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor {
[INFO] [stdout]    |                                  ^^ help: if this is intentional, prefix it with an underscore: `_c2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `can_hold`
[INFO] [stdout]   --> src/bin/tests/main.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn can_hold(&self, other: &Rectangle) -> bool {
[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 variable: `t`
[INFO] [stdout]   --> src/bin/generics/traits.rs:71:56
[INFO] [stdout]    |
[INFO] [stdout] 71 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {3}
[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/generics/traits.rs:71:62
[INFO] [stdout]    |
[INFO] [stdout] 71 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {3}
[INFO] [stdout]    |                                                              ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/bin/generics/traits.rs:72:35
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn some_function_with_where<T, U>(t: T, u: U) -> i32
[INFO] [stdout]    |                                   ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]   --> src/bin/generics/traits.rs:72:41
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn some_function_with_where<T, U>(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: `notifyBound`
[INFO] [stdout]   --> src/bin/generics/traits.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | pub fn notifyBound<T: Summary>(item: T) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `notifyPlusSyntax`
[INFO] [stdout]   --> src/bin/generics/traits.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub fn notifyPlusSyntax(item: impl Summary + Display) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `notifyWow`
[INFO] [stdout]   --> src/bin/generics/traits.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 67 | pub fn notifyWow<T: Summary + Display>(item: T) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `some_function`
[INFO] [stdout]   --> src/bin/generics/traits.rs:71:4
[INFO] [stdout]    |
[INFO] [stdout] 71 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {3}
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `some_function_with_where`
[INFO] [stdout]   --> src/bin/generics/traits.rs:72:4
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn some_function_with_where<T, U>(t: T, u: U) -> i32
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `returns_summarizable`
[INFO] [stdout]   --> src/bin/generics/traits.rs:78:4
[INFO] [stdout]    |
[INFO] [stdout] 78 | fn returns_summarizable() -> impl Summary {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `largest_copy`
[INFO] [stdout]   --> src/bin/generics/traits.rs:88:4
[INFO] [stdout]    |
[INFO] [stdout] 88 | fn largest_copy<T: PartialOrd + Copy>(list: &[T]) -> T {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `largest_clone`
[INFO] [stdout]    --> src/bin/generics/traits.rs:100:4
[INFO] [stdout]     |
[INFO] [stdout] 100 | fn largest_clone<T>(list: &[T]) -> T
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `largest_ref`
[INFO] [stdout]    --> src/bin/generics/traits.rs:113:4
[INFO] [stdout]     |
[INFO] [stdout] 113 | fn largest_ref<T: PartialOrd>(list: &[T]) -> &T {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Pair`
[INFO] [stdout]    --> src/bin/generics/traits.rs:123:8
[INFO] [stdout]     |
[INFO] [stdout] 123 | struct Pair<T>{
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `cmp_display`
[INFO] [stdout]    --> src/bin/generics/traits.rs:129:8
[INFO] [stdout]     |
[INFO] [stdout] 129 |     fn cmp_display(&self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_this_an_extension_function`
[INFO] [stdout]    --> src/bin/generics/traits.rs:154:4
[INFO] [stdout]     |
[INFO] [stdout] 154 | fn is_this_an_extension_function(){
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `longest_with_an_announcement`
[INFO] [stdout]   --> src/bin/generics/lifetimes.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn longest_with_an_announcement<'a, T>(x: &'a str, y: &'a str, ann: T) -> &'a str
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `take_ownership`
[INFO] [stdout]   --> src/bin/generics/main.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn take_ownership(t: Tweet){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notifyBound` should have a snake case name
[INFO] [stdout]   --> src/bin/generics/traits.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | pub fn notifyBound<T: Summary>(item: T) {
[INFO] [stdout]    |        ^^^^^^^^^^^ help: convert the identifier to snake case: `notify_bound`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notifyPlusSyntax` should have a snake case name
[INFO] [stdout]   --> src/bin/generics/traits.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub fn notifyPlusSyntax(item: impl Summary + Display) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `notify_plus_syntax`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notifyWow` should have a snake case name
[INFO] [stdout]   --> src/bin/generics/traits.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 67 | pub fn notifyWow<T: Summary + Display>(item: T) {
[INFO] [stdout]    |        ^^^^^^^^^ help: convert the identifier to snake case: `notify_wow`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 21 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::env`
[INFO] [stdout]  --> src/bin/minigrep/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::env;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/bin/closures/main.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let x = 4;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[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/closures/iterators.rs:61:4
[INFO] [stdout]    |
[INFO] [stdout] 61 | fn shoes_in_my_size(shoes: Vec<Shoe>, shoe_size: u32) -> Vec<Shoe> {
[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/closures/iterators.rs:92:8
[INFO] [stdout]    |
[INFO] [stdout] 92 |     fn new() -> Counter {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `simulated_expensive_calculation`
[INFO] [stdout]  --> src/bin/closures/main.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn simulated_expensive_calculation(intensity: u32) -> u32 {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `inner_func`
[INFO] [stdout]   --> src/bin/closures/main.rs:31:4
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn inner_func(){
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/bin/collections/main.rs:89:6
[INFO] [stdout]    |
[INFO] [stdout] 89 |     };
[INFO] [stdout]    |      ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/bin/collections/main.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let v: Vec<u128> = Vec::new();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[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/collections/main.rs:71:5
[INFO] [stdout]    |
[INFO] [stdout] 71 |     s2 = String::from("xxx");
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/collections/main.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     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: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/collections/main.rs:82:9
[INFO] [stdout]    |
[INFO] [stdout] 82 |     let mut sss = SSS {
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `accessing`
[INFO] [stdout]   --> src/bin/collections/main.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn accessing() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `no_mutable_and_imutable_in_same_scope`
[INFO] [stdout]   --> src/bin/collections/main.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn no_mutable_and_imutable_in_same_scope() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `edit_in_place`
[INFO] [stdout]   --> src/bin/collections/main.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn edit_in_place() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `enum_vec`
[INFO] [stdout]   --> src/bin/collections/main.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn enum_vec() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `stringss`
[INFO] [stdout]   --> src/bin/collections/main.rs:60:4
[INFO] [stdout]    |
[INFO] [stdout] 60 | fn stringss() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `vec_of_stracts`
[INFO] [stdout]   --> src/bin/collections/main.rs:75:4
[INFO] [stdout]    |
[INFO] [stdout] 75 | fn vec_of_stracts() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `update_entry_in_a_map`
[INFO] [stdout]   --> src/bin/collections/main.rs:97:4
[INFO] [stdout]    |
[INFO] [stdout] 97 | fn update_entry_in_a_map() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `Id` should have a snake case name
[INFO] [stdout]   --> src/bin/collections/main.rs:78:9
[INFO] [stdout]    |
[INFO] [stdout] 78 |         Id: String,
[INFO] [stdout]    |         ^^ help: convert the identifier to snake case (notice the capitalization): `id`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `resp`
[INFO] [stdout]   --> src/bin/http_async/main.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let resp = reqwest::get("https://httpbin.org/ip")
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_resp`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_username_from_file`
[INFO] [stdout]   --> src/bin/http_async/main.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn read_username_from_file() -> Result<String, io::Error> {
[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: unused variable: `word_count`
[INFO] [stdout]   --> src/bin/hash/main.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |     let word_count : HashMap<_,_> = v.iter()
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_word_count`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `zzip`
[INFO] [stdout]   --> src/bin/hash/main.rs:60:4
[INFO] [stdout]    |
[INFO] [stdout] 60 | fn zzip(v : &Vec<u8>){
[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: struct is never constructed: `DA`
[INFO] [stdout]   --> src/bin/enums/main.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | struct DA {
[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: `era`
[INFO] [stdout]  --> src/bin/guessing_game/rect.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pub fn era(&self) -> u32 {
[INFO] [stdout]   |            ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `print_x`
[INFO] [stdout]   --> src/bin/guessing_game/rect.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn print_x(&self , format: &str) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `meta`
[INFO] [stdout]   --> src/bin/errors/errors.rs:31:15
[INFO] [stdout]    |
[INFO] [stdout] 31 |     if let Ok(meta) = f.metadata() {
[INFO] [stdout]    |               ^^^^ help: if this is intentional, prefix it with an underscore: `_meta`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/errors/errors.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     read_username_from_file_v2();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/errors/errors.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     read_username_from_file_v3();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/errors/errors.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         fs::remove_file("hello.txt");
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::env`
[INFO] [stdout]  --> src/bin/minigrep/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::env;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str::FromStr`
[INFO] [stdout]  --> src/lib/config.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::str::FromStr;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]   --> src/lib/config.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let args: Vec<String> = env::args().collect();
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c1`
[INFO] [stdout]   --> src/lib/pub_use.rs:31:16
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor {
[INFO] [stdout]    |                ^^ help: if this is intentional, prefix it with an underscore: `_c1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c2`
[INFO] [stdout]   --> src/lib/pub_use.rs:31:34
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor {
[INFO] [stdout]    |                                  ^^ help: if this is intentional, prefix it with an underscore: `_c2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/bin/collections/main.rs:89:6
[INFO] [stdout]    |
[INFO] [stdout] 89 |     };
[INFO] [stdout]    |      ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `meta`
[INFO] [stdout]   --> src/bin/errors/errors.rs:31:15
[INFO] [stdout]    |
[INFO] [stdout] 31 |     if let Ok(meta) = f.metadata() {
[INFO] [stdout]    |               ^^^^ help: if this is intentional, prefix it with an underscore: `_meta`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/bin/generics/traits.rs:71:56
[INFO] [stdout]    |
[INFO] [stdout] 71 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {3}
[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/generics/traits.rs:71:62
[INFO] [stdout]    |
[INFO] [stdout] 71 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {3}
[INFO] [stdout]    |                                                              ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/bin/generics/traits.rs:72:35
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn some_function_with_where<T, U>(t: T, u: U) -> i32
[INFO] [stdout]    |                                   ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]   --> src/bin/generics/traits.rs:72:41
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn some_function_with_where<T, U>(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: unused variable: `v`
[INFO] [stdout]   --> src/bin/collections/main.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let v: Vec<u128> = Vec::new();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[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/collections/main.rs:71:5
[INFO] [stdout]    |
[INFO] [stdout] 71 |     s2 = String::from("xxx");
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/collections/main.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     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 import: `super::*`
[INFO] [stdout]  --> src/bin/closures/iterators.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     use super::*;
[INFO] [stdout]   |         ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/errors/errors.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     read_username_from_file_v2();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `notifyBound`
[INFO] [stdout]   --> src/bin/generics/traits.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | pub fn notifyBound<T: Summary>(item: T) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/errors/errors.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     read_username_from_file_v3();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `notifyPlusSyntax`
[INFO] [stdout]   --> src/bin/generics/traits.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub fn notifyPlusSyntax(item: impl Summary + Display) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/errors/errors.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         fs::remove_file("hello.txt");
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `notifyWow`
[INFO] [stdout]   --> src/bin/generics/traits.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 67 | pub fn notifyWow<T: Summary + Display>(item: T) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `some_function`
[INFO] [stdout]   --> src/bin/generics/traits.rs:71:4
[INFO] [stdout]    |
[INFO] [stdout] 71 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {3}
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `some_function_with_where`
[INFO] [stdout]   --> src/bin/generics/traits.rs:72:4
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn some_function_with_where<T, U>(t: T, u: U) -> i32
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `returns_summarizable`
[INFO] [stdout]   --> src/bin/generics/traits.rs:78:4
[INFO] [stdout]    |
[INFO] [stdout] 78 | fn returns_summarizable() -> impl Summary {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `largest_copy`
[INFO] [stdout]   --> src/bin/generics/traits.rs:88:4
[INFO] [stdout]    |
[INFO] [stdout] 88 | fn largest_copy<T: PartialOrd + Copy>(list: &[T]) -> T {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `largest_clone`
[INFO] [stdout]    --> src/bin/generics/traits.rs:100:4
[INFO] [stdout]     |
[INFO] [stdout] 100 | fn largest_clone<T>(list: &[T]) -> T
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `largest_ref`
[INFO] [stdout]    --> src/bin/generics/traits.rs:113:4
[INFO] [stdout]     |
[INFO] [stdout] 113 | fn largest_ref<T: PartialOrd>(list: &[T]) -> &T {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Pair`
[INFO] [stdout]    --> src/bin/generics/traits.rs:123:8
[INFO] [stdout]     |
[INFO] [stdout] 123 | struct Pair<T>{
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `cmp_display`
[INFO] [stdout]    --> src/bin/generics/traits.rs:129:8
[INFO] [stdout]     |
[INFO] [stdout] 129 |     fn cmp_display(&self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_this_an_extension_function`
[INFO] [stdout]    --> src/bin/generics/traits.rs:154:4
[INFO] [stdout]     |
[INFO] [stdout] 154 | fn is_this_an_extension_function(){
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `longest_with_an_announcement`
[INFO] [stdout]   --> src/bin/generics/lifetimes.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn longest_with_an_announcement<'a, T>(x: &'a str, y: &'a str, ann: T) -> &'a str
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `take_ownership`
[INFO] [stdout]   --> src/bin/generics/main.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn take_ownership(t: Tweet){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notifyBound` should have a snake case name
[INFO] [stdout]   --> src/bin/generics/traits.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | pub fn notifyBound<T: Summary>(item: T) {
[INFO] [stdout]    |        ^^^^^^^^^^^ help: convert the identifier to snake case: `notify_bound`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notifyPlusSyntax` should have a snake case name
[INFO] [stdout]   --> src/bin/generics/traits.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub fn notifyPlusSyntax(item: impl Summary + Display) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `notify_plus_syntax`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notifyWow` should have a snake case name
[INFO] [stdout]   --> src/bin/generics/traits.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 67 | pub fn notifyWow<T: Summary + Display>(item: T) {
[INFO] [stdout]    |        ^^^^^^^^^ help: convert the identifier to snake case: `notify_wow`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/collections/main.rs:82:9
[INFO] [stdout]    |
[INFO] [stdout] 82 |     let mut sss = SSS {
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `accessing`
[INFO] [stdout]   --> src/bin/collections/main.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn accessing() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `no_mutable_and_imutable_in_same_scope`
[INFO] [stdout]   --> src/bin/collections/main.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn no_mutable_and_imutable_in_same_scope() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `edit_in_place`
[INFO] [stdout]   --> src/bin/collections/main.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn edit_in_place() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `enum_vec`
[INFO] [stdout]   --> src/bin/collections/main.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn enum_vec() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `stringss`
[INFO] [stdout]   --> src/bin/collections/main.rs:60:4
[INFO] [stdout]    |
[INFO] [stdout] 60 | fn stringss() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `vec_of_stracts`
[INFO] [stdout]   --> src/bin/collections/main.rs:75:4
[INFO] [stdout]    |
[INFO] [stdout] 75 | fn vec_of_stracts() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `update_entry_in_a_map`
[INFO] [stdout]   --> src/bin/collections/main.rs:97:4
[INFO] [stdout]    |
[INFO] [stdout] 97 | fn update_entry_in_a_map() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `Id` should have a snake case name
[INFO] [stdout]   --> src/bin/collections/main.rs:78:9
[INFO] [stdout]    |
[INFO] [stdout] 78 |         Id: String,
[INFO] [stdout]    |         ^^ help: convert the identifier to snake case (notice the capitalization): `id`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `DA`
[INFO] [stdout]   --> src/bin/enums/main.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | struct DA {
[INFO] [stdout]    |        ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word_count`
[INFO] [stdout]   --> src/bin/hash/main.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |     let word_count : HashMap<_,_> = v.iter()
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_word_count`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `zzip`
[INFO] [stdout]   --> src/bin/hash/main.rs:60:4
[INFO] [stdout]    |
[INFO] [stdout] 60 | fn zzip(v : &Vec<u8>){
[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: `era`
[INFO] [stdout]  --> src/bin/guessing_game/rect.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pub fn era(&self) -> u32 {
[INFO] [stdout]   |            ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `print_x`
[INFO] [stdout]   --> src/bin/guessing_game/rect.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn print_x(&self , format: &str) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/bin/closures/main.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let x = 4;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `simulated_expensive_calculation`
[INFO] [stdout]  --> src/bin/closures/main.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn simulated_expensive_calculation(intensity: u32) -> u32 {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `inner_func`
[INFO] [stdout]   --> src/bin/closures/main.rs:31:4
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn inner_func(){
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `resp`
[INFO] [stdout]   --> src/bin/http_async/main.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let resp = reqwest::get("https://httpbin.org/ip")
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_resp`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_username_from_file`
[INFO] [stdout]   --> src/bin/http_async/main.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn read_username_from_file() -> Result<String, io::Error> {
[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: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 21 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings 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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.15s
[INFO] running `Command { std: "docker" "inspect" "a0badc694b844c92c4152c806bce82519e8fb2e30ed2815f6504296af39be8f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0badc694b844c92c4152c806bce82519e8fb2e30ed2815f6504296af39be8f6", kill_on_drop: false }`
[INFO] [stdout] a0badc694b844c92c4152c806bce82519e8fb2e30ed2815f6504296af39be8f6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 022c31801fe2d83bca2416697189a3554227b8c446ad0be84969ec8dd3deb999
[INFO] running `Command { std: "docker" "start" "-a" "022c31801fe2d83bca2416697189a3554227b8c446ad0be84969ec8dd3deb999", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/lib/config.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `args`
[INFO] [stderr]   --> src/lib/config.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |     let args: Vec<String> = env::args().collect();
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c1`
[INFO] [stderr]   --> src/lib/pub_use.rs:31:16
[INFO] [stderr]    |
[INFO] [stderr] 31 |     pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor {
[INFO] [stderr]    |                ^^ help: if this is intentional, prefix it with an underscore: `_c1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c2`
[INFO] [stderr]   --> src/lib/pub_use.rs:31:34
[INFO] [stderr]    |
[INFO] [stderr] 31 |     pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor {
[INFO] [stderr]    |                                  ^^ help: if this is intentional, prefix it with an underscore: `_c2`
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/lib/config.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `args`
[INFO] [stderr]   --> src/lib/config.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |     let args: Vec<String> = env::args().collect();
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c1`
[INFO] [stderr]   --> src/lib/pub_use.rs:31:16
[INFO] [stderr]    |
[INFO] [stderr] 31 |     pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor {
[INFO] [stderr]    |                ^^ help: if this is intentional, prefix it with an underscore: `_c1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c2`
[INFO] [stderr]   --> src/lib/pub_use.rs:31:34
[INFO] [stderr]    |
[INFO] [stderr] 31 |     pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor {
[INFO] [stderr]    |                                  ^^ help: if this is intentional, prefix it with an underscore: `_c2`
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `era`
[INFO] [stderr]  --> src/bin/guessing_game/rect.rs:8:12
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn era(&self) -> u32 {
[INFO] [stderr]   |            ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `print_x`
[INFO] [stderr]   --> src/bin/guessing_game/rect.rs:12:12
[INFO] [stderr]    |
[INFO] [stderr] 12 |     pub fn print_x(&self , format: &str) {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `meta`
[INFO] [stderr]   --> src/bin/errors/errors.rs:31:15
[INFO] [stderr]    |
[INFO] [stderr] 31 |     if let Ok(meta) = f.metadata() {
[INFO] [stderr]    |               ^^^^ help: if this is intentional, prefix it with an underscore: `_meta`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/bin/errors/errors.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     read_username_from_file_v2();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/bin/errors/errors.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     read_username_from_file_v3();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/bin/errors/errors.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |         fs::remove_file("hello.txt");
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `word_count`
[INFO] [stderr]   --> src/bin/hash/main.rs:62:9
[INFO] [stderr]    |
[INFO] [stderr] 62 |     let word_count : HashMap<_,_> = v.iter()
[INFO] [stderr]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_word_count`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `zzip`
[INFO] [stderr]   --> src/bin/hash/main.rs:60:4
[INFO] [stderr]    |
[INFO] [stderr] 60 | fn zzip(v : &Vec<u8>){
[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: `resp`
[INFO] [stderr]   --> src/bin/http_async/main.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 |     let resp = reqwest::get("https://httpbin.org/ip")
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_resp`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_username_from_file`
[INFO] [stderr]   --> src/bin/http_async/main.rs:24:4
[INFO] [stderr]    |
[INFO] [stderr] 24 | fn read_username_from_file() -> Result<String, io::Error> {
[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 import: `std::env`
[INFO] [stderr]  --> src/bin/minigrep/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::env;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `meta`
[INFO] [stderr]   --> src/bin/errors/errors.rs:31:15
[INFO] [stderr]    |
[INFO] [stderr] 31 |     if let Ok(meta) = f.metadata() {
[INFO] [stderr]    |               ^^^^ help: if this is intentional, prefix it with an underscore: `_meta`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/bin/errors/errors.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     read_username_from_file_v2();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/bin/errors/errors.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     read_username_from_file_v3();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/bin/errors/errors.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |         fs::remove_file("hello.txt");
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `era`
[INFO] [stderr]  --> src/bin/guessing_game/rect.rs:8:12
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn era(&self) -> u32 {
[INFO] [stderr]   |            ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `print_x`
[INFO] [stderr]   --> src/bin/guessing_game/rect.rs:12:12
[INFO] [stderr]    |
[INFO] [stderr] 12 |     pub fn print_x(&self , format: &str) {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `resp`
[INFO] [stderr]   --> src/bin/http_async/main.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 |     let resp = reqwest::get("https://httpbin.org/ip")
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_resp`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_username_from_file`
[INFO] [stderr]   --> src/bin/http_async/main.rs:24:4
[INFO] [stderr]    |
[INFO] [stderr] 24 | fn read_username_from_file() -> Result<String, io::Error> {
[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: associated function is never used: `can_hold`
[INFO] [stderr]   --> src/bin/tests/main.rs:14:8
[INFO] [stderr]    |
[INFO] [stderr] 14 |     fn can_hold(&self, other: &Rectangle) -> bool {
[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: `t`
[INFO] [stderr]   --> src/bin/generics/traits.rs:71:56
[INFO] [stderr]    |
[INFO] [stderr] 71 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {3}
[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/generics/traits.rs:71:62
[INFO] [stderr]    |
[INFO] [stderr] 71 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {3}
[INFO] [stderr]    |                                                              ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]   --> src/bin/generics/traits.rs:72:35
[INFO] [stderr]    |
[INFO] [stderr] 72 | fn some_function_with_where<T, U>(t: T, u: U) -> i32
[INFO] [stderr]    |                                   ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `u`
[INFO] [stderr]   --> src/bin/generics/traits.rs:72:41
[INFO] [stderr]    |
[INFO] [stderr] 72 | fn some_function_with_where<T, U>(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: `notifyBound`
[INFO] [stderr]   --> src/bin/generics/traits.rs:59:8
[INFO] [stderr]    |
[INFO] [stderr] 59 | pub fn notifyBound<T: Summary>(item: T) {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `notifyPlusSyntax`
[INFO] [stderr]   --> src/bin/generics/traits.rs:63:8
[INFO] [stderr]    |
[INFO] [stderr] 63 | pub fn notifyPlusSyntax(item: impl Summary + Display) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `notifyWow`
[INFO] [stderr]   --> src/bin/generics/traits.rs:67:8
[INFO] [stderr]    |
[INFO] [stderr] 67 | pub fn notifyWow<T: Summary + Display>(item: T) {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `some_function`
[INFO] [stderr]   --> src/bin/generics/traits.rs:71:4
[INFO] [stderr]    |
[INFO] [stderr] 71 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {3}
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `some_function_with_where`
[INFO] [stderr]   --> src/bin/generics/traits.rs:72:4
[INFO] [stderr]    |
[INFO] [stderr] 72 | fn some_function_with_where<T, U>(t: T, u: U) -> i32
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `returns_summarizable`
[INFO] [stderr]   --> src/bin/generics/traits.rs:78:4
[INFO] [stderr]    |
[INFO] [stderr] 78 | fn returns_summarizable() -> impl Summary {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `largest_copy`
[INFO] [stderr]   --> src/bin/generics/traits.rs:88:4
[INFO] [stderr]    |
[INFO] [stderr] 88 | fn largest_copy<T: PartialOrd + Copy>(list: &[T]) -> T {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `largest_clone`
[INFO] [stderr]    --> src/bin/generics/traits.rs:100:4
[INFO] [stderr]     |
[INFO] [stderr] 100 | fn largest_clone<T>(list: &[T]) -> T
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `largest_ref`
[INFO] [stderr]    --> src/bin/generics/traits.rs:113:4
[INFO] [stderr]     |
[INFO] [stderr] 113 | fn largest_ref<T: PartialOrd>(list: &[T]) -> &T {
[INFO] [stderr]     |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Pair`
[INFO] [stderr]    --> src/bin/generics/traits.rs:123:8
[INFO] [stderr]     |
[INFO] [stderr] 123 | struct Pair<T>{
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `cmp_display`
[INFO] [stderr]    --> src/bin/generics/traits.rs:129:8
[INFO] [stderr]     |
[INFO] [stderr] 129 |     fn cmp_display(&self) {
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_this_an_extension_function`
[INFO] [stderr]    --> src/bin/generics/traits.rs:154:4
[INFO] [stderr]     |
[INFO] [stderr] 154 | fn is_this_an_extension_function(){
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `longest_with_an_announcement`
[INFO] [stderr]   --> src/bin/generics/lifetimes.rs:22:4
[INFO] [stderr]    |
[INFO] [stderr] 22 | fn longest_with_an_announcement<'a, T>(x: &'a str, y: &'a str, ann: T) -> &'a str
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `take_ownership`
[INFO] [stderr]   --> src/bin/generics/main.rs:26:4
[INFO] [stderr]    |
[INFO] [stderr] 26 | fn take_ownership(t: Tweet){
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notifyBound` should have a snake case name
[INFO] [stderr]   --> src/bin/generics/traits.rs:59:8
[INFO] [stderr]    |
[INFO] [stderr] 59 | pub fn notifyBound<T: Summary>(item: T) {
[INFO] [stderr]    |        ^^^^^^^^^^^ help: convert the identifier to snake case: `notify_bound`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `notifyPlusSyntax` should have a snake case name
[INFO] [stderr]   --> src/bin/generics/traits.rs:63:8
[INFO] [stderr]    |
[INFO] [stderr] 63 | pub fn notifyPlusSyntax(item: impl Summary + Display) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `notify_plus_syntax`
[INFO] [stderr] 
[INFO] [stderr] warning: function `notifyWow` should have a snake case name
[INFO] [stderr]   --> src/bin/generics/traits.rs:67:8
[INFO] [stderr]    |
[INFO] [stderr] 67 | pub fn notifyWow<T: Summary + Display>(item: T) {
[INFO] [stderr]    |        ^^^^^^^^^ help: convert the identifier to snake case: `notify_wow`
[INFO] [stderr] 
[INFO] [stderr] warning: 21 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]   --> src/bin/collections/main.rs:89:6
[INFO] [stderr]    |
[INFO] [stderr] 89 |     };
[INFO] [stderr]    |      ^ help: remove this semicolon
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]   --> src/bin/collections/main.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let v: Vec<u128> = Vec::new();
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `s2` is never read
[INFO] [stderr]   --> src/bin/collections/main.rs:71:5
[INFO] [stderr]    |
[INFO] [stderr] 71 |     s2 = String::from("xxx");
[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: variable does not need to be mutable
[INFO] [stderr]   --> src/bin/collections/main.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |     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: variable does not need to be mutable
[INFO] [stderr]   --> src/bin/collections/main.rs:82:9
[INFO] [stderr]    |
[INFO] [stderr] 82 |     let mut sss = SSS {
[INFO] [stderr]    |         ----^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `accessing`
[INFO] [stderr]   --> src/bin/collections/main.rs:11:4
[INFO] [stderr]    |
[INFO] [stderr] 11 | fn accessing() {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `no_mutable_and_imutable_in_same_scope`
[INFO] [stderr]   --> src/bin/collections/main.rs:20:4
[INFO] [stderr]    |
[INFO] [stderr] 20 | fn no_mutable_and_imutable_in_same_scope() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `edit_in_place`
[INFO] [stderr]   --> src/bin/collections/main.rs:27:4
[INFO] [stderr]    |
[INFO] [stderr] 27 | fn edit_in_place() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `enum_vec`
[INFO] [stderr]   --> src/bin/collections/main.rs:35:4
[INFO] [stderr]    |
[INFO] [stderr] 35 | fn enum_vec() {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `stringss`
[INFO] [stderr]   --> src/bin/collections/main.rs:60:4
[INFO] [stderr]    |
[INFO] [stderr] 60 | fn stringss() {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `vec_of_stracts`
[INFO] [stderr]   --> src/bin/collections/main.rs:75:4
[INFO] [stderr]    |
[INFO] [stderr] 75 | fn vec_of_stracts() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `update_entry_in_a_map`
[INFO] [stderr]   --> src/bin/collections/main.rs:97:4
[INFO] [stderr]    |
[INFO] [stderr] 97 | fn update_entry_in_a_map() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: structure field `Id` should have a snake case name
[INFO] [stderr]   --> src/bin/collections/main.rs:78:9
[INFO] [stderr]    |
[INFO] [stderr] 78 |         Id: String,
[INFO] [stderr]    |         ^^ help: convert the identifier to snake case (notice the capitalization): `id`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 13 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::env`
[INFO] [stderr]  --> src/bin/minigrep/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::env;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]   --> src/bin/generics/traits.rs:71:56
[INFO] [stderr]    |
[INFO] [stderr] 71 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {3}
[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/generics/traits.rs:71:62
[INFO] [stderr]    |
[INFO] [stderr] 71 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {3}
[INFO] [stderr]    |                                                              ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]   --> src/bin/generics/traits.rs:72:35
[INFO] [stderr]    |
[INFO] [stderr] 72 | fn some_function_with_where<T, U>(t: T, u: U) -> i32
[INFO] [stderr]    |                                   ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `u`
[INFO] [stderr]   --> src/bin/generics/traits.rs:72:41
[INFO] [stderr]    |
[INFO] [stderr] 72 | fn some_function_with_where<T, U>(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: `notifyBound`
[INFO] [stderr]   --> src/bin/generics/traits.rs:59:8
[INFO] [stderr]    |
[INFO] [stderr] 59 | pub fn notifyBound<T: Summary>(item: T) {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `notifyPlusSyntax`
[INFO] [stderr]   --> src/bin/generics/traits.rs:63:8
[INFO] [stderr]    |
[INFO] [stderr] 63 | pub fn notifyPlusSyntax(item: impl Summary + Display) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `notifyWow`
[INFO] [stderr]   --> src/bin/generics/traits.rs:67:8
[INFO] [stderr]    |
[INFO] [stderr] 67 | pub fn notifyWow<T: Summary + Display>(item: T) {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `some_function`
[INFO] [stderr]   --> src/bin/generics/traits.rs:71:4
[INFO] [stderr]    |
[INFO] [stderr] 71 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {3}
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `some_function_with_where`
[INFO] [stderr]   --> src/bin/generics/traits.rs:72:4
[INFO] [stderr]    |
[INFO] [stderr] 72 | fn some_function_with_where<T, U>(t: T, u: U) -> i32
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `returns_summarizable`
[INFO] [stderr]   --> src/bin/generics/traits.rs:78:4
[INFO] [stderr]    |
[INFO] [stderr] 78 | fn returns_summarizable() -> impl Summary {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `largest_copy`
[INFO] [stderr]   --> src/bin/generics/traits.rs:88:4
[INFO] [stderr]    |
[INFO] [stderr] 88 | fn largest_copy<T: PartialOrd + Copy>(list: &[T]) -> T {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `largest_clone`
[INFO] [stderr]    --> src/bin/generics/traits.rs:100:4
[INFO] [stderr]     |
[INFO] [stderr] 100 | fn largest_clone<T>(list: &[T]) -> T
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `largest_ref`
[INFO] [stderr]    --> src/bin/generics/traits.rs:113:4
[INFO] [stderr]     |
[INFO] [stderr] 113 | fn largest_ref<T: PartialOrd>(list: &[T]) -> &T {
[INFO] [stderr]     |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Pair`
[INFO] [stderr]    --> src/bin/generics/traits.rs:123:8
[INFO] [stderr]     |
[INFO] [stderr] 123 | struct Pair<T>{
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `cmp_display`
[INFO] [stderr]    --> src/bin/generics/traits.rs:129:8
[INFO] [stderr]     |
[INFO] [stderr] 129 |     fn cmp_display(&self) {
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_this_an_extension_function`
[INFO] [stderr]    --> src/bin/generics/traits.rs:154:4
[INFO] [stderr]     |
[INFO] [stderr] 154 | fn is_this_an_extension_function(){
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `longest_with_an_announcement`
[INFO] [stderr]   --> src/bin/generics/lifetimes.rs:22:4
[INFO] [stderr]    |
[INFO] [stderr] 22 | fn longest_with_an_announcement<'a, T>(x: &'a str, y: &'a str, ann: T) -> &'a str
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `take_ownership`
[INFO] [stderr]   --> src/bin/generics/main.rs:26:4
[INFO] [stderr]    |
[INFO] [stderr] 26 | fn take_ownership(t: Tweet){
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notifyBound` should have a snake case name
[INFO] [stderr]   --> src/bin/generics/traits.rs:59:8
[INFO] [stderr]    |
[INFO] [stderr] 59 | pub fn notifyBound<T: Summary>(item: T) {
[INFO] [stderr]    |        ^^^^^^^^^^^ help: convert the identifier to snake case: `notify_bound`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `notifyPlusSyntax` should have a snake case name
[INFO] [stderr]   --> src/bin/generics/traits.rs:63:8
[INFO] [stderr]    |
[INFO] [stderr] 63 | pub fn notifyPlusSyntax(item: impl Summary + Display) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `notify_plus_syntax`
[INFO] [stderr] 
[INFO] [stderr] warning: function `notifyWow` should have a snake case name
[INFO] [stderr]   --> src/bin/generics/traits.rs:67:8
[INFO] [stderr]    |
[INFO] [stderr] 67 | pub fn notifyWow<T: Summary + Display>(item: T) {
[INFO] [stderr]    |        ^^^^^^^^^ help: convert the identifier to snake case: `notify_wow`
[INFO] [stderr] 
[INFO] [stderr] warning: 21 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `DA`
[INFO] [stderr]   --> src/bin/enums/main.rs:28:8
[INFO] [stderr]    |
[INFO] [stderr] 28 | struct DA {
[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: `x`
[INFO] [stderr]   --> src/bin/closures/main.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let x = 4;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `shoes_in_my_size`
[INFO] [stderr]   --> src/bin/closures/iterators.rs:61:4
[INFO] [stderr]    |
[INFO] [stderr] 61 | fn shoes_in_my_size(shoes: Vec<Shoe>, shoe_size: u32) -> Vec<Shoe> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/bin/closures/iterators.rs:92:8
[INFO] [stderr]    |
[INFO] [stderr] 92 |     fn new() -> Counter {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `simulated_expensive_calculation`
[INFO] [stderr]  --> src/bin/closures/main.rs:9:4
[INFO] [stderr]   |
[INFO] [stderr] 9 | fn simulated_expensive_calculation(intensity: u32) -> u32 {
[INFO] [stderr]   |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `inner_func`
[INFO] [stderr]   --> src/bin/closures/main.rs:31:4
[INFO] [stderr]    |
[INFO] [stderr] 31 | fn inner_func(){
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `word_count`
[INFO] [stderr]   --> src/bin/hash/main.rs:62:9
[INFO] [stderr]    |
[INFO] [stderr] 62 |     let word_count : HashMap<_,_> = v.iter()
[INFO] [stderr]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_word_count`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `zzip`
[INFO] [stderr]   --> src/bin/hash/main.rs:60:4
[INFO] [stderr]    |
[INFO] [stderr] 60 | fn zzip(v : &Vec<u8>){
[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: struct is never constructed: `DA`
[INFO] [stderr]   --> src/bin/enums/main.rs:28:8
[INFO] [stderr]    |
[INFO] [stderr] 28 | struct DA {
[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: unnecessary trailing semicolon
[INFO] [stderr]   --> src/bin/collections/main.rs:89:6
[INFO] [stderr]    |
[INFO] [stderr] 89 |     };
[INFO] [stderr]    |      ^ help: remove this semicolon
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]   --> src/bin/collections/main.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let v: Vec<u128> = Vec::new();
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `s2` is never read
[INFO] [stderr]   --> src/bin/collections/main.rs:71:5
[INFO] [stderr]    |
[INFO] [stderr] 71 |     s2 = String::from("xxx");
[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: variable does not need to be mutable
[INFO] [stderr]   --> src/bin/collections/main.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |     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: variable does not need to be mutable
[INFO] [stderr]   --> src/bin/collections/main.rs:82:9
[INFO] [stderr]    |
[INFO] [stderr] 82 |     let mut sss = SSS {
[INFO] [stderr]    |         ----^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `accessing`
[INFO] [stderr]   --> src/bin/collections/main.rs:11:4
[INFO] [stderr]    |
[INFO] [stderr] 11 | fn accessing() {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `no_mutable_and_imutable_in_same_scope`
[INFO] [stderr]   --> src/bin/collections/main.rs:20:4
[INFO] [stderr]    |
[INFO] [stderr] 20 | fn no_mutable_and_imutable_in_same_scope() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `edit_in_place`
[INFO] [stderr]   --> src/bin/collections/main.rs:27:4
[INFO] [stderr]    |
[INFO] [stderr] 27 | fn edit_in_place() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `enum_vec`
[INFO] [stderr]   --> src/bin/collections/main.rs:35:4
[INFO] [stderr]    |
[INFO] [stderr] 35 | fn enum_vec() {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `stringss`
[INFO] [stderr]   --> src/bin/collections/main.rs:60:4
[INFO] [stderr]    |
[INFO] [stderr] 60 | fn stringss() {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `vec_of_stracts`
[INFO] [stderr]   --> src/bin/collections/main.rs:75:4
[INFO] [stderr]    |
[INFO] [stderr] 75 | fn vec_of_stracts() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `update_entry_in_a_map`
[INFO] [stderr]   --> src/bin/collections/main.rs:97:4
[INFO] [stderr]    |
[INFO] [stderr] 97 | fn update_entry_in_a_map() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: structure field `Id` should have a snake case name
[INFO] [stderr]   --> src/bin/collections/main.rs:78:9
[INFO] [stderr]    |
[INFO] [stderr] 78 |         Id: String,
[INFO] [stderr]    |         ^^ help: convert the identifier to snake case (notice the capitalization): `id`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 13 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]  --> src/bin/closures/iterators.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     use super::*;
[INFO] [stderr]   |         ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/bin/closures/main.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let x = 4;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `simulated_expensive_calculation`
[INFO] [stderr]  --> src/bin/closures/main.rs:9:4
[INFO] [stderr]   |
[INFO] [stderr] 9 | fn simulated_expensive_calculation(intensity: u32) -> u32 {
[INFO] [stderr]   |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `inner_func`
[INFO] [stderr]   --> src/bin/closures/main.rs:31:4
[INFO] [stderr]    |
[INFO] [stderr] 31 | fn inner_func(){
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.19s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/mygrep-aa4d199c1fd38483)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test add_two::tests::test_add ... ok
[INFO] [stdout] test search::tests::case_sensitive ... ok
[INFO] [stdout] test search::tests::case_insensitive ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- search::tests::case_insensitive stdout ----
[INFO] [stdout] thread 'search::tests::case_insensitive' panicked at 'assertion failed: `(left == right)`
[INFO] [stdout]   left: `["Rust:", "Trust me."]`,
[INFO] [stdout]  right: `[]`', src/lib/search.rs:40:9
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x564980b39da0 - std::backtrace_rs::backtrace::libunwind::trace::h34055254b57d8e79
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stdout]    1:     0x564980b39da0 - std::backtrace_rs::backtrace::trace_unsynchronized::h8f1e3fbd9afff6ec
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x564980b39da0 - std::sys_common::backtrace::_print_fmt::h3a99a796b770c360
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stdout]    3:     0x564980b39da0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h32d1f94a80615d18
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stdout]    4:     0x564980b5caac - core::fmt::write::h306731c068f7162c
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/fmt/mod.rs:1110:17
[INFO] [stdout]    5:     0x564980b36cc5 - std::io::Write::write_fmt::h87f19b0a2cd190bc
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/io/mod.rs:1588:15
[INFO] [stdout]    6:     0x564980b3bf0b - std::sys_common::backtrace::_print::h5abaa2601a852287
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stdout]    7:     0x564980b3bf0b - std::sys_common::backtrace::print::h8d81445442bb638f
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stdout]    8:     0x564980b3bf0b - std::panicking::default_hook::{{closure}}::hcfe804496a9fa747
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:208:50
[INFO] [stdout]    9:     0x564980b3ba1c - std::panicking::default_hook::hbea8e3ccf2ba8901
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:222:9
[INFO] [stdout]   10:     0x564980b3c5d4 - std::panicking::rust_panic_with_hook::h7ee9e1a2d0f8975a
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:622:17
[INFO] [stdout]   11:     0x564980b3c0b7 - std::panicking::begin_panic_handler::{{closure}}::h8ab3b4491718b2c7
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:519:13
[INFO] [stdout]   12:     0x564980b3a29c - std::sys_common::backtrace::__rust_end_short_backtrace::hd489062ffa586a9f
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stdout]   13:     0x564980b3c019 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:515:5
[INFO] [stdout]   14:     0x564980adc651 - core::panicking::panic_fmt::hca6330e3e14086b4
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/panicking.rs:92:14
[INFO] [stdout]   15:     0x564980b5b3c8 - core::panicking::assert_failed_inner::h33b45280069a80ed
[INFO] [stdout]   16:     0x564980ae757a - core::panicking::assert_failed::h83ee93e0def2c98b
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/panicking.rs:117:5
[INFO] [stdout]   17:     0x564980ae86d7 - mygrep::search::tests::case_insensitive::h717862ae52486ef7
[INFO] [stdout]                                at /opt/rustwide/workdir/src/lib/search.rs:40:9
[INFO] [stdout]   18:     0x564980ae854a - mygrep::search::tests::case_insensitive::{{closure}}::h663c5d3719d3bc4b
[INFO] [stdout]                                at /opt/rustwide/workdir/src/lib/search.rs:32:5
[INFO] [stdout]   19:     0x564980ae8c1e - core::ops::function::FnOnce::call_once::hc9ab095804255458
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/ops/function.rs:227:5
[INFO] [stdout]   20:     0x564980b112a3 - core::ops::function::FnOnce::call_once::h152e7e439ff59e19
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/ops/function.rs:227:5
[INFO] [stdout]   21:     0x564980b112a3 - test::__rust_begin_short_backtrace::h0908f3b1fdbb72ab
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/test/src/lib.rs:577:5
[INFO] [stdout]   22:     0x564980b0fd60 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf6d2a51e5587546c
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/alloc/src/boxed.rs:1575:9
[INFO] [stdout]   23:     0x564980b0fd60 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h8af660f3a89ef593
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panic.rs:347:9
[INFO] [stdout]   24:     0x564980b0fd60 - std::panicking::try::do_call::hd36aef60f84b6d36
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:401:40
[INFO] [stdout]   25:     0x564980b0fd60 - std::panicking::try::h9932b4480e69817c
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:365:19
[INFO] [stdout]   26:     0x564980b0fd60 - std::panic::catch_unwind::h6aa177099cfff5f8
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panic.rs:434:14
[INFO] [stdout]   27:     0x564980b0fd60 - test::run_test_in_process::h5884d6f2d99e20c3
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/test/src/lib.rs:600:18
[INFO] [stdout]   28:     0x564980b0fd60 - test::run_test::run_test_inner::{{closure}}::h6fdc58c6d5f5b6e3
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/test/src/lib.rs:492:39
[INFO] [stdout]   29:     0x564980ae9412 - test::run_test::run_test_inner::{{closure}}::h408365d67a78ade8
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/test/src/lib.rs:519:37
[INFO] [stdout]   30:     0x564980ae9412 - std::sys_common::backtrace::__rust_begin_short_backtrace::hb560b77c4f701523
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/sys_common/backtrace.rs:125:18
[INFO] [stdout]   31:     0x564980aecfc8 - std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}::hf2e7831dad93c597
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/thread/mod.rs:481:17
[INFO] [stdout]   32:     0x564980aecfc8 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hd2e08783d8be4d02
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panic.rs:347:9
[INFO] [stdout]   33:     0x564980aecfc8 - std::panicking::try::do_call::h062597b7acfd6b82
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:401:40
[INFO] [stdout]   34:     0x564980aecfc8 - std::panicking::try::h0d7b79db04c14552
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:365:19
[INFO] [stdout]   35:     0x564980aecfc8 - std::panic::catch_unwind::hb01a0b5e7c8cd43b
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panic.rs:434:14
[INFO] [stdout]   36:     0x564980aecfc8 - std::thread::Builder::spawn_unchecked::{{closure}}::h5bde48cc887e0d1e
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/thread/mod.rs:480:30
[INFO] [stdout]   37:     0x564980aecfc8 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h745ea30807a29e55
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/ops/function.rs:227:5
[INFO] [stdout]   38:     0x564980b41097 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h7ece6cfefaff1005
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/alloc/src/boxed.rs:1575:9
[INFO] [stdout]   39:     0x564980b41097 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hb8b48e55c21f193e
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/alloc/src/boxed.rs:1575:9
[INFO] [stdout]   40:     0x564980b41097 - std::sys::unix::thread::Thread::new::thread_start::h8c7c4450dba62914
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/sys/unix/thread.rs:71:17
[INFO] [stdout]   41:     0x7fe23180f609 - start_thread
[INFO] [stdout]   42:     0x7fe2315e1293 - clone
[INFO] [stdout]   43:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     search::tests::case_insensitive
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 2 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--lib'
[INFO] running `Command { std: "docker" "inspect" "022c31801fe2d83bca2416697189a3554227b8c446ad0be84969ec8dd3deb999", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "022c31801fe2d83bca2416697189a3554227b8c446ad0be84969ec8dd3deb999", kill_on_drop: false }`
[INFO] [stdout] 022c31801fe2d83bca2416697189a3554227b8c446ad0be84969ec8dd3deb999
