[INFO] fetching crate guessing_game_viggin 0.1.0...
[INFO] checking guessing_game_viggin-0.1.0 against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] extracting crate guessing_game_viggin 0.1.0 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate guessing_game_viggin 0.1.0 on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-11/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 `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f3c67a8ce8c044891e8b5115f71f9621e7a4dba91da2ed0e9a0ea388d9184d6f
[INFO] running `"docker" "start" "-a" "f3c67a8ce8c044891e8b5115f71f9621e7a4dba91da2ed0e9a0ea388d9184d6f"`
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]     Checking arc-swap v0.4.4
[INFO] [stderr]    Compiling openssl v0.10.28
[INFO] [stderr]     Checking smallvec v1.2.0
[INFO] [stderr]     Checking tower-service v0.3.0
[INFO] [stderr]     Checking base64 v0.11.0
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]    Compiling openssl-sys v0.9.54
[INFO] [stderr]     Checking http v0.2.0
[INFO] [stderr]     Checking log v0.4.8
[INFO] [stderr]    Compiling proc-macro2 v1.0.8
[INFO] [stderr]     Checking encoding_rs v0.8.22
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking serde_json v1.0.48
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking rand_pcg v0.1.2
[INFO] [stderr]     Checking signal-hook-registry v1.2.0
[INFO] [stderr]     Checking unicode-normalization v0.1.12
[INFO] [stderr]     Checking rand_chacha v0.1.1
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]    Compiling native-tls v0.2.3
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]    Compiling mime_guess v2.0.1
[INFO] [stderr]     Checking url v2.1.1
[INFO] [stderr]     Checking http-body v0.3.1
[INFO] [stderr]     Checking 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]     Checking tokio v0.2.11
[INFO] [stderr]    Compiling futures-macro v0.3.4
[INFO] [stderr]     Checking pin-project v0.4.8
[INFO] [stderr]     Checking futures-util v0.3.4
[INFO] [stderr]     Checking tokio-util v0.2.0
[INFO] [stderr]     Checking tokio-tls v0.3.0
[INFO] [stderr]     Checking h2 v0.2.1
[INFO] [stderr]     Checking futures-executor v0.3.4
[INFO] [stderr]     Checking futures v0.3.4
[INFO] [stderr]     Checking hyper v0.13.2
[INFO] [stderr]     Checking hyper-tls v0.4.1
[INFO] [stderr]     Checking reqwest v0.10.1
[INFO] [stderr]     Checking guessing_game_viggin v0.1.0 (/opt/rustwide/workdir)
[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 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 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::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: 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 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: unused `std::result::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 `std::result::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 `std::result::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: 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: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[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: 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: 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: 12 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `era`
[INFO] [stderr]  --> src/bin/guessing_game/rect.rs:8:5
[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: 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: method is never used: `print_x`
[INFO] [stderr]   --> src/bin/guessing_game/rect.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     pub fn print_x(&self , format: &str) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings 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: 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: 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: method is never used: `cmp_display`
[INFO] [stderr]    --> src/bin/generics/traits.rs:129:5
[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: 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 `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: unused `std::result::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 `std::result::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 `std::result::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: 21 warnings emitted
[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: method is never used: `era`
[INFO] [stderr]  --> src/bin/guessing_game/rect.rs:8:5
[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: method is never used: `print_x`
[INFO] [stderr]   --> src/bin/guessing_game/rect.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     pub fn print_x(&self , format: &str) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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: method is never used: `new`
[INFO] [stderr]   --> src/bin/closures/iterators.rs:92:5
[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: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[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: method is never used: `can_hold`
[INFO] [stderr]   --> src/bin/tests/main.rs:14:5
[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: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning 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: 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: 1 warning 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: `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: 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: 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: 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: 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: `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: method is never used: `cmp_display`
[INFO] [stderr]    --> src/bin/generics/traits.rs:129:5
[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: 2 warnings emitted
[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: 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 `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: 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: 12 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 21 warnings emitted
[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: 2 warnings 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: `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 dev [unoptimized + debuginfo] target(s) in 38.39s
[INFO] running `"docker" "inspect" "f3c67a8ce8c044891e8b5115f71f9621e7a4dba91da2ed0e9a0ea388d9184d6f"`
[INFO] running `"docker" "rm" "-f" "f3c67a8ce8c044891e8b5115f71f9621e7a4dba91da2ed0e9a0ea388d9184d6f"`
[INFO] [stdout] f3c67a8ce8c044891e8b5115f71f9621e7a4dba91da2ed0e9a0ea388d9184d6f