[INFO] cloning repository https://github.com/yiqing-95/prog_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yiqing-95/prog_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyiqing-95%2Fprog_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyiqing-95%2Fprog_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1cf8f1c298ddf1d0cdb3a26e5cb66d5f26f18b0f
[INFO] testing yiqing-95/prog_rust against 1.76.0 for beta-1.77-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyiqing-95%2Fprog_rust" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yiqing-95/prog_rust on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/yiqing-95/prog_rust
[INFO] finished tweaking git repo https://github.com/yiqing-95/prog_rust
[INFO] tweaked toml for git repo https://github.com/yiqing-95/prog_rust written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/yiqing-95/prog_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "c243538bbf9d8284b2e79451e9a8496300a9126a44250ed0b9624958b03b09cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c243538bbf9d8284b2e79451e9a8496300a9126a44250ed0b9624958b03b09cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c243538bbf9d8284b2e79451e9a8496300a9126a44250ed0b9624958b03b09cf", kill_on_drop: false }`
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[INFO] [stderr]    Compiling hi_rbatis v0.1.0 (/opt/rustwide/workdir/crates/hi_rbatis)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> crates/hi_rbatis/src/main.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     /// enable log crate to show sql logs
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 33 |     fast_log::init(fast_log::Config::new().console()).expect("rbatis init fail");
[INFO] [stdout]    |     ---------------------------------------------------------------------------- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> crates/hi_rbatis/src/main.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     /// initialize rbatis. also you can call rb.clone(). this is  an Arc point
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 35 |     let rb = RBatis::new();
[INFO] [stdout]    |     ----------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> crates/hi_rbatis/src/main.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 36 |     /// connect to database 
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 |     rb.link(SqliteDriver {}, "sqlite://../target/sqlite.db").await.unwrap();
[INFO] [stdout]    |     ----------------------------------------------------------------------- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling my_rust v0.1.0 (/opt/rustwide/workdir/crates/my_rust)
[INFO] [stdout] warning: unused imports: `get`, `post`
[INFO] [stdout]  --> crates/my_rust/src/ch1/actix_gcd.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use actix_web::{get, post, web, App, HttpResponse, HttpServer};
[INFO] [stdout]   |                 ^^^  ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]   --> crates/my_rust/src/ch7/mod.rs:63:5
[INFO] [stdout]    |
[INFO] [stdout] 63 | use std::ops::Deref;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::num::ParseIntError`
[INFO] [stdout]  --> crates/my_rust/src/ch8/mod.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::num::ParseIntError;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::num::ParseIntError`
[INFO] [stdout]  --> crates/my_rust/src/ch9/mod.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::num::ParseIntError;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Write`
[INFO] [stdout]  --> crates/my_rust/src/ch11/trait_objects.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::Write;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BTreeSet`, `HashSet`
[INFO] [stdout]  --> crates/my_rust/src/ch15/sets.rs:1:24
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::{BTreeSet, HashSet};
[INFO] [stdout]   |                        ^^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BTreeMap`, `HashMap`
[INFO] [stdout]    --> crates/my_rust/src/ch15/mod.rs:133:28
[INFO] [stdout]     |
[INFO] [stdout] 133 |     use std::collections::{BTreeMap, HashMap};
[INFO] [stdout]     |                            ^^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]    --> crates/my_rust/src/ch15/mod.rs:134:9
[INFO] [stdout]     |
[INFO] [stdout] 134 |     use super::*;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::ch15::dump`
[INFO] [stdout]    --> crates/my_rust/src/ch15/mod.rs:264:9
[INFO] [stdout]     |
[INFO] [stdout] 264 |     use crate::ch15::dump;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]    --> crates/my_rust/src/ch15/mod.rs:548:9
[INFO] [stdout]     |
[INFO] [stdout] 548 |     use std::collections::HashMap;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashSet`
[INFO] [stdout]  --> crates/my_rust/src/ch16/vecs.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::HashSet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::VecDeque`
[INFO] [stdout]  --> crates/my_rust/src/ch16/deques.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::VecDeque;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str::FromStr`
[INFO] [stdout]   --> crates/my_rust/src/main.rs:97:9
[INFO] [stdout]    |
[INFO] [stdout] 97 |     use std::str::FromStr;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `speech`
[INFO] [stdout]  --> crates/my_rust/src/ch3/strings.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let speech = "\"Ouch!\" said the well.\n";
[INFO] [stdout]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_speech`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `default_win_install_path`
[INFO] [stdout]   --> crates/my_rust/src/ch3/strings.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let default_win_install_path = r"C:\Program Files\Gorillas";
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_default_win_install_path`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pattern`
[INFO] [stdout]   --> crates/my_rust/src/ch3/strings.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let pattern = Regex::new(r"\d+(\.\d+)*");
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_pattern`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `i` is assigned to, but never used
[INFO] [stdout]   --> crates/my_rust/src/ch3/mod.rs:67:13
[INFO] [stdout]    |
[INFO] [stdout] 67 |     let mut i = 1;
[INFO] [stdout]    |             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_i` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> crates/my_rust/src/ch4/ownership.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let t = s.clone();
[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]   --> crates/my_rust/src/ch4/ownership.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let u = s.clone();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> crates/my_rust/src/ch5/lifetimes.rs:87:27
[INFO] [stdout]    |
[INFO] [stdout] 87 |     fn f0<'a>(r: &'a i32, s: &'a i32) -> &'a i32 { r } // perhaps too tight
[INFO] [stdout]    |                           ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> crates/my_rust/src/ch5/lifetimes.rs:88:30
[INFO] [stdout]    |
[INFO] [stdout] 88 |     fn f<'a, 'b>(r: &'a i32, s: &'b i32) -> &'a i32 { r } // looser
[INFO] [stdout]    |                              ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]   --> crates/my_rust/src/ch7/mod.rs:24:16
[INFO] [stdout]    |
[INFO] [stdout] 24 |     if let Err(err) = real_main() {
[INFO] [stdout]    |                ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first` is never used
[INFO] [stdout]    --> crates/my_rust/src/main.rs:136:4
[INFO] [stdout]     |
[INFO] [stdout] 136 | fn first<T>(v: &Vec<T>) -> Option<&T> {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `square_loop` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch1/mandelbrot.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn square_loop(mut x: f64) {
[INFO] [stdout]   |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `square_add_loop` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch1/mandelbrot.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn square_add_loop(c: f64) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `complex_square_add_loop` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch1/mandelbrot.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn complex_square_add_loop(c: Complex<f64>) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]    --> crates/my_rust/src/ch1/mandelbrot.rs:157:12
[INFO] [stdout]     |
[INFO] [stdout] 157 |     pub fn main() {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `build_vector` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch3/mod.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn build_vector() -> Vec<i16> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `build_vector2` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch3/mod.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn build_vector2() -> Vec<i16> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ambiguous_numeric_type` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch3/mod.rs:59:4
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn ambiguous_numeric_type() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `panics_in_debug_build` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch3/mod.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn panics_in_debug_build() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `panics_in_any_build` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch3/mod.rs:73:4
[INFO] [stdout]    |
[INFO] [stdout] 73 | fn panics_in_any_build() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch3/floating_point_types.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch3/floating_point_types.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn main() {}
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_split_at2` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch3/tuples.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | }fn test_split_at2() {
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `new_pixel_buffer` is never used
[INFO] [stdout]    --> crates/my_rust/src/ch3/sequence_values.rs:115:4
[INFO] [stdout]     |
[INFO] [stdout] 115 | fn new_pixel_buffer(rows: usize, cols: usize) -> Vec<u8> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `literals` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch3/strings.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn literals() {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_padovan` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch4/ownership.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn print_padovan() {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example1` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch4/ownership.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn example1() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example2` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch4/ownership.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn example2() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `deep_copy` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch4/ownership.rs:42:4
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn deep_copy() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example3` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch4/ownership.rs:48:4
[INFO] [stdout]    |
[INFO] [stdout] 48 | fn example3() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Table` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch5/refs_values.rs:3:6
[INFO] [stdout]   |
[INFO] [stdout] 3 | type Table = HashMap<String, Vec<String>>;
[INFO] [stdout]   |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `show` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch5/refs_values.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn show(table: &Table) {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `show1` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch5/refs_values.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn show1(table: Table) {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sort_works` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch5/refs_values.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn sort_works(table: &mut Table) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `implicitly_borrow` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch5/refs_values.rs:73:4
[INFO] [stdout]    |
[INFO] [stdout] 73 | fn implicitly_borrow() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `references_to_references` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch5/refs_values.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn references_to_references() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `app_name` is never read
[INFO] [stdout]  --> crates/my_rust/src/ch5/lifetimes.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Config {
[INFO] [stdout]   |        ------ field in this struct
[INFO] [stdout] 3 |     app_name: String,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Config` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `config` is never read
[INFO] [stdout]  --> crates/my_rust/src/ch5/lifetimes.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct App<'a> {
[INFO] [stdout]   |        --- field in this struct
[INFO] [stdout] 8 |     config: &'a Config,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `App` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ref_args` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch5/lifetimes.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn ref_args() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `STASH` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch5/lifetimes.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 | static mut STASH: &i32 = &128;
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch5/lifetimes.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn f(p: &'static i32) {
[INFO] [stdout]    |    ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `distinct_lifetime` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch5/lifetimes.rs:82:4
[INFO] [stdout]    |
[INFO] [stdout] 82 | fn distinct_lifetime() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `GenericError` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch7/mod.rs:14:6
[INFO] [stdout]    |
[INFO] [stdout] 14 | type GenericError = Box<dyn std::error::Error + Send + Sync + 'static>;
[INFO] [stdout]    |      ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `GenericResult` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch7/mod.rs:16:6
[INFO] [stdout]    |
[INFO] [stdout] 16 | type GenericResult<T> = Result<T, GenericError>;
[INFO] [stdout]    |      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `real_main` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch7/mod.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn real_main() -> Result<(), GenericError> {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch7/mod.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_numbers` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch7/mod.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn read_numbers(file: &mut dyn BufRead) -> GenericResult<Vec<i64>> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_error` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch7/mod.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn print_error(mut err: &dyn Error) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `move_all` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch7/mod.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn move_all(src: &Path, dst: &Path) -> io::Result<()> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `pirate_share` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch7/panics.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn pirate_share(total: u64, crew_size: usize) -> u64 {
[INFO] [stdout]   |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `roughly_equal` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch8/mod.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn roughly_equal(a: f64, b: f64) -> bool {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `GrayscaleMap` is never constructed
[INFO] [stdout]   --> crates/my_rust/src/ch9/mod.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | struct GrayscaleMap {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `new_map` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch9/mod.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn new_map(size: (usize, usize), pixels: Vec<u8>) -> GrayscaleMap {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Broom` is never constructed
[INFO] [stdout]   --> crates/my_rust/src/ch9/mod.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 52 | struct Broom {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `FetchWater` and `DumpWater` are never constructed
[INFO] [stdout]   --> crates/my_rust/src/ch9/mod.rs:62:20
[INFO] [stdout]    |
[INFO] [stdout] 62 | enum BroomIntent { FetchWater, DumpWater }
[INFO] [stdout]    |      -----------   ^^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout]    |      |
[INFO] [stdout]    |      variants in this enum
[INFO] [stdout]    |
[INFO] [stdout]    = note: `BroomIntent` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `chop` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch9/mod.rs:65:4
[INFO] [stdout]    |
[INFO] [stdout] 65 | fn chop(b: Broom) -> (Broom, Broom) {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Bounds` is never constructed
[INFO] [stdout]  --> crates/my_rust/src/ch9/tuple_like_structs.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Bounds(usize, usize);
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Ascii` is never constructed
[INFO] [stdout]   --> crates/my_rust/src/ch9/tuple_like_structs.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct Ascii(Vec<u8>);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Onesuch` is never constructed
[INFO] [stdout]   --> crates/my_rust/src/ch9/tuple_like_structs.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | struct Onesuch;
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Queue` is never constructed
[INFO] [stdout]  --> crates/my_rust/src/ch9/impls.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct Queue {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `push` and `pop` are never used
[INFO] [stdout]   --> crates/my_rust/src/ch9/impls.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 8  | impl Queue {
[INFO] [stdout]    | ---------- methods in this implementation
[INFO] [stdout] 9  |     /// Push a character onto the back of a queue.
[INFO] [stdout] 10 |     pub fn push(&mut self, c: char) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 13 |     pub fn pop(&mut self) -> Option<char> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_empty` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch9/impls.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 40 | impl Queue {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] 41 |     pub fn is_empty(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `split` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch9/impls.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 54 | impl Queue {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] 55 |     pub fn split(self) -> (Vec<char>, Vec<char>) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch9/impls.rs:74:12
[INFO] [stdout]    |
[INFO] [stdout] 73 | impl Queue {
[INFO] [stdout]    | ---------- associated function in this implementation
[INFO] [stdout] 74 |     pub fn new() -> Queue {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Vector2` is never constructed
[INFO] [stdout]   --> crates/my_rust/src/ch9/impls.rs:80:12
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub struct Vector2 {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated constants `ZERO` and `UNIT` are never used
[INFO] [stdout]   --> crates/my_rust/src/ch9/impls.rs:86:11
[INFO] [stdout]    |
[INFO] [stdout] 85 | impl Vector2 {
[INFO] [stdout]    | ------------ associated constants in this implementation
[INFO] [stdout] 86 |     const ZERO: Vector2 = Vector2 { x: 0.0, y: 0.0 };
[INFO] [stdout]    |           ^^^^
[INFO] [stdout] 87 |     const UNIT: Vector2 = Vector2 { x: 1.0, y: 0.0 };
[INFO] [stdout]    |           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated constants `NAME` and `ID` are never used
[INFO] [stdout]   --> crates/my_rust/src/ch9/impls.rs:91:11
[INFO] [stdout]    |
[INFO] [stdout] 90 | impl Vector2 {
[INFO] [stdout]    | ------------ associated constants in this implementation
[INFO] [stdout] 91 |     const NAME: &'static str = "Vector2";
[INFO] [stdout]    |           ^^^^
[INFO] [stdout] 92 |     const ID: u32 = 18;
[INFO] [stdout]    |           ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> crates/my_rust/src/ch9/simpled_xml.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Node { tag: String,
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch9/simpled_xml.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | impl Node {
[INFO] [stdout]   | --------- associated function in this implementation
[INFO] [stdout] 6 |     fn new(tag: &str) -> Node {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Queue` is never constructed
[INFO] [stdout]  --> crates/my_rust/src/ch9/generic_structs.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Queue<T> {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `push`, and `is_empty` are never used
[INFO] [stdout]   --> crates/my_rust/src/ch9/generic_structs.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 6  | impl<T> Queue<T> {
[INFO] [stdout]    | ---------------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 10 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 14 |     pub fn push(&mut self, t: T) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     pub fn is_empty(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `sum` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch9/generic_structs.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | impl Queue<f64> {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 25 |
[INFO] [stdout] 26 |     fn sum(&self) -> f64 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Extrema` is never constructed
[INFO] [stdout]  --> crates/my_rust/src/ch9/struct_with_lifetimes.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Extrema<'elt> {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `find_extrema` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch9/struct_with_lifetimes.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn find_extrema<'s>(slice: &'s [i32]) -> Extrema<'s> {
[INFO] [stdout]   |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `GrayscaleMap` is never constructed
[INFO] [stdout]   --> crates/my_rust/src/ch9/mod.rs:44:16
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub struct GrayscaleMap {
[INFO] [stdout]    |                ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `compare` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch10/mod.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn compare(n: i32, m: i32) -> Ordering {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Seconds`, `Minutes`, `Hours`, `Days`, `Months`, and `Years` are never constructed
[INFO] [stdout]   --> crates/my_rust/src/ch10/mod.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub enum TimeUnit {
[INFO] [stdout]    |          -------- variants in this enum
[INFO] [stdout] 47 |     Seconds,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 48 |     Minutes,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 49 |     Hours,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 50 |     Days,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 51 |     Months,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 52 |     Years,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TimeUnit` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `plural` and `singular` are never used
[INFO] [stdout]   --> crates/my_rust/src/ch10/mod.rs:58:12
[INFO] [stdout]    |
[INFO] [stdout] 56 | impl TimeUnit {
[INFO] [stdout]    | ------------- methods in this implementation
[INFO] [stdout] 57 |     /// Return the plural noun for this time unit.
[INFO] [stdout] 58 |    pub  fn plural(self) -> &'static str {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |     pub fn singular(self) -> &'static str {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `InThePast`, `JustNow`, and `InTheFuture` are never constructed
[INFO] [stdout]  --> crates/my_rust/src/ch10/enum_with_data.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub enum RoughTime {
[INFO] [stdout]   |          --------- variants in this enum
[INFO] [stdout] 6 |     InThePast(TimeUnit, u32),
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 7 |     JustNow,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 8 |     InTheFuture(TimeUnit, u32),
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `RoughTime` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Json` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch10/enum_with_data.rs:41:6
[INFO] [stdout]    |
[INFO] [stdout] 41 | enum Json { Null,
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `BinaryTree` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch10/generic_enums.rs:4:6
[INFO] [stdout]   |
[INFO] [stdout] 4 | enum BinaryTree<T> {
[INFO] [stdout]   |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TreeNode` is never constructed
[INFO] [stdout]   --> crates/my_rust/src/ch10/generic_enums.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct TreeNode<T> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rough_time_to_english` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch10/generic_enums.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn rough_time_to_english(rt: RoughTime) -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `match_struct` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch10/matches.rs:44:4
[INFO] [stdout]    |
[INFO] [stdout] 44 | fn match_struct() {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `match_array` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch10/matches.rs:56:4
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn match_array() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `match_slice` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch10/matches.rs:67:4
[INFO] [stdout]    |
[INFO] [stdout] 67 | fn match_slice() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ref_pattern` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch10/matches.rs:79:4
[INFO] [stdout]    |
[INFO] [stdout] 79 | fn ref_pattern() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `match_guards` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch10/matches.rs:95:4
[INFO] [stdout]    |
[INFO] [stdout] 95 | fn match_guards(){
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `multiple_possibilities` is never used
[INFO] [stdout]    --> crates/my_rust/src/ch10/matches.rs:103:5
[INFO] [stdout]     |
[INFO] [stdout] 103 | fn  multiple_possibilities(){
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `BinaryTree` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch10/bin_tree.rs:2:6
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum BinaryTree<T> {
[INFO] [stdout]   |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TreeNode` is never constructed
[INFO] [stdout]  --> crates/my_rust/src/ch10/bin_tree.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct TreeNode<T> {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `add` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch10/bin_tree.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl<T: Ord> BinaryTree<T> {
[INFO] [stdout]    | -------------------------- method in this implementation
[INFO] [stdout] 15 |     fn add(&mut self, value: T) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `say_hello` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch11/mod.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn say_hello(out: &mut dyn Write) -> std::io::Result<()> {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `min` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch11/mod.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn min<T: Ord>(value1: T, value2: T) -> T {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `say_hello` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch11/generics.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn say_hello<W: Write>(out: &mut W) -> std::io::Result<()> { out.write_all(b"hello world\n")?;
[INFO] [stdout]   |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `collect_into_vector` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch11/iterators.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn collect_into_vector<I: Iterator>(iter: I) -> Vec<I::Item> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dump` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch11/iterators.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn dump<I>(iter: I) where I: Iterator, I::Item: Debug
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dump2` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch11/iterators.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn dump2(iter: &mut dyn Iterator<Item=String>) {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `cyclical_zip` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch11/iterators.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn cyclical_zip(v: Vec<u8>, u: Vec<u8>) -> impl Iterator<Item=u8> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch11/impl_traits.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn print<T: Display>(val: T) {
[INFO] [stdout]   |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print2` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch11/impl_traits.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn print2(val: impl Display) { println!("{}", val);
[INFO] [stdout]   |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_one` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch11/associated_constants.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn add_one<T: Float + Add<Output=T>>(value: T) -> T {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fib` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch11/associated_constants.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn fib<T: Float + Add<Output=T>>(n: usize) -> T {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dot` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch11/associated_constants.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn dot<N>(v1: &[N], v2: &[N]) -> N
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dot2` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch11/associated_constants.rs:51:4
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn dot2<N: Num + Copy>(v1: &[N], v2: &[N]) -> N {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch12/index_traits.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | impl<P: Default + Copy> Image<P> {
[INFO] [stdout]    | -------------------------------- associated function in this implementation
[INFO] [stdout] 35 |     /// Create a new image of the given size.
[INFO] [stdout] 36 |     fn new(width: usize, height: usize) -> Image<P> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `City` is never constructed
[INFO] [stdout]  --> crates/my_rust/src/ch14/closures.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct City {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `city_population_descending` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch14/closures.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn city_population_descending(city: &City) -> i64 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sort_cities0` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch14/closures.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn sort_cities0(cities: &mut Vec<City>) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sort_cities` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch14/closures.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn sort_cities(cities: &mut Vec<City>) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `count_selected_cities` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch14/closures.rs:44:4
[INFO] [stdout]    |
[INFO] [stdout] 44 | fn count_selected_cities(cities: &Vec<City>, test_fn: fn(&City) -> bool) -> usize
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `has_monster_attacks` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch14/closures.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn has_monster_attacks(city: &City) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `count_selected_cities2` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch14/closures.rs:71:4
[INFO] [stdout]    |
[INFO] [stdout] 71 | fn count_selected_cities2<F>(cities: &Vec<City>, test_fn: F) -> usize where F: Fn(&City) -> bool
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `call_twice` is never used
[INFO] [stdout]    --> crates/my_rust/src/ch14/closures.rs:111:4
[INFO] [stdout]     |
[INFO] [stdout] 111 | fn call_twice<F>(closure: F) where F: Fn() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `call_twice2` is never used
[INFO] [stdout]    --> crates/my_rust/src/ch14/closures.rs:132:4
[INFO] [stdout]     |
[INFO] [stdout] 132 | fn call_twice2<F>(mut closure: F) where F: FnMut() {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Request` is never constructed
[INFO] [stdout]  --> crates/my_rust/src/ch14/callbacks.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Request {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Response` is never constructed
[INFO] [stdout]   --> crates/my_rust/src/ch14/callbacks.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Response {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BasicRouter` is never constructed
[INFO] [stdout]   --> crates/my_rust/src/ch14/callbacks.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct BasicRouter<C> where C: Fn(&Request) -> Response {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `add_route` are never used
[INFO] [stdout]   --> crates/my_rust/src/ch14/callbacks.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl<C> BasicRouter<C> where C: Fn(&Request) -> Response {
[INFO] [stdout]    | -------------------------------------------------------- associated items in this implementation
[INFO] [stdout] 22 |     /// Create an empty router.
[INFO] [stdout] 23 |     fn new() -> BasicRouter<C> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 27 |     fn add_route(&mut self, url: &str, callback: C) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FnPointerRouter` is never constructed
[INFO] [stdout]   --> crates/my_rust/src/ch14/callbacks.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 | struct FnPointerRouter {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `add_route` are never used
[INFO] [stdout]   --> crates/my_rust/src/ch14/callbacks.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 87 | impl FnPointerRouter {
[INFO] [stdout]    | -------------------- associated items in this implementation
[INFO] [stdout] 88 |     // Create an empty router.
[INFO] [stdout] 89 |     fn new() -> FnPointerRouter {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 92 |     fn add_route(&mut self, url: &str, callback: fn(&Request) -> Response) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `BoxedCallback` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch14/callbacks.rs:35:10
[INFO] [stdout]    |
[INFO] [stdout] 35 |     type BoxedCallback = Box<dyn Fn(&Request) -> Response>;
[INFO] [stdout]    |          ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BasicRouter` is never constructed
[INFO] [stdout]   --> crates/my_rust/src/ch14/callbacks.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 37 |     struct BasicRouter {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `add_route` are never used
[INFO] [stdout]   --> crates/my_rust/src/ch14/callbacks.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |     impl BasicRouter {
[INFO] [stdout]    |     ---------------- associated items in this implementation
[INFO] [stdout] 42 |         // Create an empty router.
[INFO] [stdout] 43 |         fn new() -> BasicRouter {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 50 |         fn add_route<C>(&mut self, url: &str, callback: C) where C: Fn(&Request) -> Response + 'static
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `handle_request` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch14/callbacks.rs:57:12
[INFO] [stdout]    |
[INFO] [stdout] 56 |     impl BasicRouter {
[INFO] [stdout]    |     ---------------- method in this implementation
[INFO] [stdout] 57 |         fn handle_request(&self, request: &Request) -> Response {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `triangle` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch15/mod.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn triangle(n: i32) -> i32 {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dump` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch15/mod.rs:75:4
[INFO] [stdout]    |
[INFO] [stdout] 75 | fn dump<T, U>(t: T)
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `try_fold` is never used
[INFO] [stdout]    --> crates/my_rust/src/ch15/mod.rs:677:4
[INFO] [stdout]     |
[INFO] [stdout] 677 | fn try_fold() {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Empty` and `NonEmpty` are never constructed
[INFO] [stdout]   --> crates/my_rust/src/ch15/own_iter.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 32 | enum BinaryTree<T> {
[INFO] [stdout]    |      ---------- variants in this enum
[INFO] [stdout] 33 |     Empty,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 34 |     NonEmpty(Box<TreeNode<T>>),
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `add` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch15/own_iter.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 43 | impl <T: Ord>  BinaryTree<T> {
[INFO] [stdout]    | ---------------------------- method in this implementation
[INFO] [stdout] 44 |     fn add(&mut self, value: T) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]    --> crates/my_rust/src/ch15/mod.rs:551:8
[INFO] [stdout]     |
[INFO] [stdout] 551 |     fn main() {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_last` is never used
[INFO] [stdout]    --> crates/my_rust/src/ch15/mod.rs:658:8
[INFO] [stdout]     |
[INFO] [stdout] 658 |     fn test_last() {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> crates/my_rust/src/ch1/actix_gcd.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |         main().await;
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 34 |         let _ = main().await;
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 145 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 11s
[INFO] running `Command { std: "docker" "inspect" "a62fa9d5e550394c97383a331c9676daae74b9debb7a5f2b4bda4da973d03fd4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a62fa9d5e550394c97383a331c9676daae74b9debb7a5f2b4bda4da973d03fd4", kill_on_drop: false }`
[INFO] [stdout] a62fa9d5e550394c97383a331c9676daae74b9debb7a5f2b4bda4da973d03fd4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 282c5eed85fdb40ffa03315af6c0cf96a429399548c56286b27f755dfda747b8
[INFO] running `Command { std: "docker" "start" "-a" "282c5eed85fdb40ffa03315af6c0cf96a429399548c56286b27f755dfda747b8", kill_on_drop: false }`
[INFO] [stderr]    Compiling my_rust v0.1.0 (/opt/rustwide/workdir/crates/my_rust)
[INFO] [stderr]    Compiling hi_rbatis v0.1.0 (/opt/rustwide/workdir/crates/hi_rbatis)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> crates/hi_rbatis/src/main.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     /// enable log crate to show sql logs
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 33 |     fast_log::init(fast_log::Config::new().console()).expect("rbatis init fail");
[INFO] [stdout]    |     ---------------------------------------------------------------------------- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> crates/hi_rbatis/src/main.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     /// initialize rbatis. also you can call rb.clone(). this is  an Arc point
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 35 |     let rb = RBatis::new();
[INFO] [stdout]    |     ----------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> crates/hi_rbatis/src/main.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 36 |     /// connect to database 
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 |     rb.link(SqliteDriver {}, "sqlite://../target/sqlite.db").await.unwrap();
[INFO] [stdout]    |     ----------------------------------------------------------------------- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `get`, `post`
[INFO] [stdout]  --> crates/my_rust/src/ch1/actix_gcd.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use actix_web::{get, post, web, App, HttpResponse, HttpServer};
[INFO] [stdout]   |                 ^^^  ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> crates/my_rust/src/ch5/refs_values.rs:64:5
[INFO] [stdout]    |
[INFO] [stdout] 64 |     ;
[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 import: `std::ops::Deref`
[INFO] [stdout]   --> crates/my_rust/src/ch7/mod.rs:63:5
[INFO] [stdout]    |
[INFO] [stdout] 63 | use std::ops::Deref;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> crates/my_rust/src/ch14/closures.rs:61:5
[INFO] [stdout]    |
[INFO] [stdout] 61 | /     /// An example of a test function. Note that the type of
[INFO] [stdout] 62 | |     /// this function is `fn(&City) -> bool`, the same as
[INFO] [stdout] 63 | |     /// the `test_fn` argument to `count_selected_cities`.
[INFO] [stdout]    | |_____-----------------------------------------------------^
[INFO] [stdout]    |       |
[INFO] [stdout]    |       rustdoc does not generate documentation for macro invocations
[INFO] [stdout]    |
[INFO] [stdout]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::binary_heap::PeekMut`
[INFO] [stdout]  --> crates/my_rust/src/ch15/bin_heaps.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     use std::collections::binary_heap::PeekMut;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BTreeSet`
[INFO] [stdout]  --> crates/my_rust/src/ch15/sets.rs:1:24
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::{BTreeSet, HashSet};
[INFO] [stdout]   |                        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> crates/my_rust/src/ch15/mod.rs:487:9
[INFO] [stdout]     |
[INFO] [stdout] 487 | /         /**
[INFO] [stdout] 488 | |
[INFO] [stdout] 489 | |         impl<'a, I: Iterator + ?Sized> Iterator for &'a mut I { type Item = I::Item;
[INFO] [stdout] 490 | |         fn next(&mut self) -> Option<I::Item> {
[INFO] [stdout] ...   |
[INFO] [stdout] 494 | |
[INFO] [stdout] 495 | |          */
[INFO] [stdout]     | |___________^
[INFO] [stdout] 496 | /         let message = "To: jimb\r\n From: id\r\n
[INFO] [stdout] 497 | | \r\n
[INFO] [stdout] 498 | | Oooooh, donuts!!\r\n";
[INFO] [stdout]     | |______________________- rustdoc does not generate documentation for statements
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `/* */` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str::FromStr`
[INFO] [stdout]   --> crates/my_rust/src/main.rs:97:9
[INFO] [stdout]    |
[INFO] [stdout] 97 |     use std::str::FromStr;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sa`
[INFO] [stdout]    --> crates/my_rust/src/ch3/sequence_values.rs:134:9
[INFO] [stdout]     |
[INFO] [stdout] 134 |     let sa: &[f64] = &a;
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_sa`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> crates/my_rust/src/ch3/sequence_values.rs:123:9
[INFO] [stdout]     |
[INFO] [stdout] 123 |     let mut s2 = &mut [1, 2, 3];
[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: `speech`
[INFO] [stdout]  --> crates/my_rust/src/ch3/strings.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let speech = "\"Ouch!\" said the well.\n";
[INFO] [stdout]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_speech`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `default_win_install_path`
[INFO] [stdout]   --> crates/my_rust/src/ch3/strings.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let default_win_install_path = r"C:\Program Files\Gorillas";
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_default_win_install_path`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pattern`
[INFO] [stdout]   --> crates/my_rust/src/ch3/strings.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let pattern = Regex::new(r"\d+(\.\d+)*");
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_pattern`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `oodles`
[INFO] [stdout]   --> crates/my_rust/src/ch3/strings.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let oodles = &noodles[1..];
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_oodles`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `poodles`
[INFO] [stdout]   --> crates/my_rust/src/ch3/strings.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let poodles = "ಠ_ಠ";
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_poodles`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> crates/my_rust/src/ch3/strings.rs:48:23
[INFO] [stdout]    |
[INFO] [stdout] 48 |     fn some_string_fn(s: &str) {}
[INFO] [stdout]    |                       ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `i` is assigned to, but never used
[INFO] [stdout]   --> crates/my_rust/src/ch3/mod.rs:67:13
[INFO] [stdout]    |
[INFO] [stdout] 67 |     let mut i = 1;
[INFO] [stdout]    |             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_i` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> crates/my_rust/src/ch4/ownership.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let t = s.clone();
[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]   --> crates/my_rust/src/ch4/ownership.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let u = s.clone();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> crates/my_rust/src/ch5/lifetimes.rs:87:27
[INFO] [stdout]    |
[INFO] [stdout] 87 |     fn f0<'a>(r: &'a i32, s: &'a i32) -> &'a i32 { r } // perhaps too tight
[INFO] [stdout]    |                           ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> crates/my_rust/src/ch5/lifetimes.rs:88:30
[INFO] [stdout]    |
[INFO] [stdout] 88 |     fn f<'a, 'b>(r: &'a i32, s: &'b i32) -> &'a i32 { r } // looser
[INFO] [stdout]    |                              ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]   --> crates/my_rust/src/ch7/mod.rs:24:16
[INFO] [stdout]    |
[INFO] [stdout] 24 |     if let Err(err) = real_main() {
[INFO] [stdout]    |                ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `q`
[INFO] [stdout]   --> crates/my_rust/src/ch9/generic_structs.rs:34:13
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let mut q = Queue::<char>::new();
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_q`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> crates/my_rust/src/ch9/generic_structs.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let mut q = Queue::<char>::new();
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `four_score_and_seven_years_ago`
[INFO] [stdout]   --> crates/my_rust/src/ch10/enum_with_data.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let four_score_and_seven_years_ago = RoughTime::InThePast(TimeUnit::Years, 4 * 20 + 7);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_four_score_and_seven_years_ago`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `three_hours_from_now`
[INFO] [stdout]   --> crates/my_rust/src/ch10/enum_with_data.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let three_hours_from_now = RoughTime::InTheFuture(TimeUnit::Hours, 3);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_three_hours_from_now`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mars_tree`
[INFO] [stdout]   --> crates/my_rust/src/ch10/generic_enums.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let mars_tree = NonEmpty(Box::new(TreeNode {
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mars_tree`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]  --> crates/my_rust/src/ch11/trait_objects.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let writer: &mut dyn Write = &mut buf; // ok
[INFO] [stdout]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `a` is assigned to, but never used
[INFO] [stdout]   --> crates/my_rust/src/ch13/drops.rs:20:17
[INFO] [stdout]    |
[INFO] [stdout] 20 |         let mut a = Appellation {
[INFO] [stdout]    |                 ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_a` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `a` is never read
[INFO] [stdout]   --> crates/my_rust/src/ch13/drops.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |         a = Appellation { name: "Hera".to_string(), nicknames: vec![] };
[INFO] [stdout]    |         ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]    --> crates/my_rust/src/ch14/closures.rs:119:9
[INFO] [stdout]     |
[INFO] [stdout] 119 |     let f = || drop(my_str);
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `incr`
[INFO] [stdout]    --> crates/my_rust/src/ch14/closures.rs:124:9
[INFO] [stdout]     |
[INFO] [stdout] 124 |     let incr = || {
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_incr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `two`
[INFO] [stdout]   --> crates/my_rust/src/ch14/callbacks.rs:80:9
[INFO] [stdout]    |
[INFO] [stdout] 80 |     let two = closure_ptr(1); // 2
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_two`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `set`
[INFO] [stdout]   --> crates/my_rust/src/ch15/sets.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let set: HashSet<&str> = large_vector.into_iter().collect();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_set`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lengths`
[INFO] [stdout]   --> crates/my_rust/src/ch15/mod.rs:90:9
[INFO] [stdout]    |
[INFO] [stdout] 90 |     let lengths: Vec<f64> =
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_lengths`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> crates/my_rust/src/ch15/mod.rs:175:13
[INFO] [stdout]     |
[INFO] [stdout] 175 |         let mut v = v.clone();
[INFO] [stdout]     |             ----^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> crates/my_rust/src/ch15/mod.rs:182:13
[INFO] [stdout]     |
[INFO] [stdout] 182 |         let mut v = v.clone();
[INFO] [stdout]     |             ----^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> crates/my_rust/src/ch15/mod.rs:186:13
[INFO] [stdout]     |
[INFO] [stdout] 186 |         let mut v = v.clone();
[INFO] [stdout]     |             ----^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `iter_rouce`
[INFO] [stdout]    --> crates/my_rust/src/ch15/mod.rs:198:13
[INFO] [stdout]     |
[INFO] [stdout] 198 |         let iter_rouce = s.chars();
[INFO] [stdout]     |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_iter_rouce`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arg`
[INFO] [stdout]    --> crates/my_rust/src/ch15/mod.rs:354:13
[INFO] [stdout]     |
[INFO] [stdout] 354 |         for arg in std::env::args().skip(1) {
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_arg`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `numbers`
[INFO] [stdout]    --> crates/my_rust/src/ch15/mod.rs:579:13
[INFO] [stdout]     |
[INFO] [stdout] 579 |         let numbers = [1.0, 4.0, std::f64::NAN, 2.0];
[INFO] [stdout]     |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_numbers`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> crates/my_rust/src/ch15/mod.rs:697:13
[INFO] [stdout]     |
[INFO] [stdout] 697 |         let args: HashSet<String> = std::env::args().collect();
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> crates/my_rust/src/ch15/mod.rs:698:13
[INFO] [stdout]     |
[INFO] [stdout] 698 |         let args: BTreeSet<String> = std::env::args().collect();
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> crates/my_rust/src/ch15/mod.rs:699:13
[INFO] [stdout]     |
[INFO] [stdout] 699 |         let args: LinkedList<String> = std::env::args().collect();
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> crates/my_rust/src/ch15/mod.rs:701:13
[INFO] [stdout]     |
[INFO] [stdout] 701 |         let args: HashMap<String, usize> = std::env::args().zip(0..).collect();
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> crates/my_rust/src/ch15/mod.rs:702:13
[INFO] [stdout]     |
[INFO] [stdout] 702 |         let args: BTreeMap<String, usize> = std::env::args().zip(0..).collect();
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `numbers`
[INFO] [stdout]  --> crates/my_rust/src/ch16/vecs.rs:6:13
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let mut numbers: Vec<i32> = vec![];
[INFO] [stdout]   |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_numbers`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `words`
[INFO] [stdout]  --> crates/my_rust/src/ch16/vecs.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let words = vec!["step", "on", "no", "pets"];
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_words`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `buffer`
[INFO] [stdout]  --> crates/my_rust/src/ch16/vecs.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let mut buffer = vec![0u8; 1024]; // 1024 zeroed-out bytes
[INFO] [stdout]   |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_buffer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> crates/my_rust/src/ch16/vecs.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let mut numbers: Vec<i32> = vec![];
[INFO] [stdout]   |         ----^^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> crates/my_rust/src/ch16/vecs.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let mut buffer = vec![0u8; 1024]; // 1024 zeroed-out bytes
[INFO] [stdout]   |         ----^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> crates/my_rust/src/ch16/vecs.rs:130:9
[INFO] [stdout]     |
[INFO] [stdout] 130 |     let a = &v[i];
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> crates/my_rust/src/ch16/vecs.rs:131:9
[INFO] [stdout]     |
[INFO] [stdout] 131 |     let b = &v[j];
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `front_half`
[INFO] [stdout]    --> crates/my_rust/src/ch16/vecs.rs:133:9
[INFO] [stdout]     |
[INFO] [stdout] 133 |     let front_half = &v[..mid];
[INFO] [stdout]     |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_front_half`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `back_half`
[INFO] [stdout]    --> crates/my_rust/src/ch16/vecs.rs:134:9
[INFO] [stdout]     |
[INFO] [stdout] 134 |     let back_half = &v[mid..];
[INFO] [stdout]     |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_back_half`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> crates/my_rust/src/ch16/vecs.rs:208:13
[INFO] [stdout]     |
[INFO] [stdout] 208 |         let mut students = ["zhang san", "wang ma zi", "li si"];
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]    --> crates/my_rust/src/ch16/vecs.rs:244:10
[INFO] [stdout]     |
[INFO] [stdout] 244 |     for (index, &val) in my_vec.iter().enumerate() {
[INFO] [stdout]     |          ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> crates/my_rust/src/ch16/deques.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let v = VecDeque::from(vec![1, 2, 3, 4]);
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> crates/my_rust/src/ch16/deques.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let mut f = my_deck.front_mut().unwrap();
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first` is never used
[INFO] [stdout]    --> crates/my_rust/src/main.rs:136:4
[INFO] [stdout]     |
[INFO] [stdout] 136 | fn first<T>(v: &Vec<T>) -> Option<&T> {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `square_loop` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch1/mandelbrot.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn square_loop(mut x: f64) {
[INFO] [stdout]   |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `square_add_loop` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch1/mandelbrot.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn square_add_loop(c: f64) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `complex_square_add_loop` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch1/mandelbrot.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn complex_square_add_loop(c: Complex<f64>) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]    --> crates/my_rust/src/ch1/mandelbrot.rs:157:12
[INFO] [stdout]     |
[INFO] [stdout] 157 |     pub fn main() {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `build_vector` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch3/mod.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn build_vector() -> Vec<i16> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `build_vector2` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch3/mod.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn build_vector2() -> Vec<i16> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ambiguous_numeric_type` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch3/mod.rs:59:4
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn ambiguous_numeric_type() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `panics_in_debug_build` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch3/mod.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn panics_in_debug_build() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `panics_in_any_build` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch3/mod.rs:73:4
[INFO] [stdout]    |
[INFO] [stdout] 73 | fn panics_in_any_build() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch3/floating_point_types.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch3/floating_point_types.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn main() {}
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_split_at2` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch3/tuples.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | }fn test_split_at2() {
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `new_pixel_buffer` is never used
[INFO] [stdout]    --> crates/my_rust/src/ch3/sequence_values.rs:115:4
[INFO] [stdout]     |
[INFO] [stdout] 115 | fn new_pixel_buffer(rows: usize, cols: usize) -> Vec<u8> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `literals` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch3/strings.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn literals() {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `some_string_fn` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch3/strings.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 |     fn some_string_fn(s: &str) {}
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_padovan` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch4/ownership.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn print_padovan() {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example1` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch4/ownership.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn example1() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example2` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch4/ownership.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn example2() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `deep_copy` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch4/ownership.rs:42:4
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn deep_copy() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example3` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch4/ownership.rs:48:4
[INFO] [stdout]    |
[INFO] [stdout] 48 | fn example3() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `birth` is never read
[INFO] [stdout]   --> crates/my_rust/src/ch4/ownership.rs:93:9
[INFO] [stdout]    |
[INFO] [stdout] 91 |     struct Person {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 92 |         name: Option<String>,
[INFO] [stdout] 93 |         birth: i32,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `show1` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch5/refs_values.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn show1(table: Table) {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sort_works` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch5/refs_values.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn sort_works(table: &mut Table) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `bechdel_pass` is never read
[INFO] [stdout]   --> crates/my_rust/src/ch5/refs_values.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |     struct Anime {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 61 |         name: &'static str,
[INFO] [stdout] 62 |         bechdel_pass: bool,
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `implicitly_borrow` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch5/refs_values.rs:73:4
[INFO] [stdout]    |
[INFO] [stdout] 73 | fn implicitly_borrow() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `references_to_references` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch5/refs_values.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn references_to_references() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `app_name` is never read
[INFO] [stdout]  --> crates/my_rust/src/ch5/lifetimes.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Config {
[INFO] [stdout]   |        ------ field in this struct
[INFO] [stdout] 3 |     app_name: String,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Config` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `config` is never read
[INFO] [stdout]  --> crates/my_rust/src/ch5/lifetimes.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct App<'a> {
[INFO] [stdout]   |        --- field in this struct
[INFO] [stdout] 8 |     config: &'a Config,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `App` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ref_args` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch5/lifetimes.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn ref_args() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `S` is never constructed
[INFO] [stdout]   --> crates/my_rust/src/ch5/lifetimes.rs:73:12
[INFO] [stdout]    |
[INFO] [stdout] 73 |     struct S<'a> {
[INFO] [stdout]    |            ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `D` is never constructed
[INFO] [stdout]   --> crates/my_rust/src/ch5/lifetimes.rs:77:12
[INFO] [stdout]    |
[INFO] [stdout] 77 |     struct D<'a> {
[INFO] [stdout]    |            ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `distinct_lifetime` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch5/lifetimes.rs:82:4
[INFO] [stdout]    |
[INFO] [stdout] 82 | fn distinct_lifetime() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `S` is never constructed
[INFO] [stdout]   --> crates/my_rust/src/ch5/lifetimes.rs:94:12
[INFO] [stdout]    |
[INFO] [stdout] 94 |     struct S<'a, 'b> {
[INFO] [stdout]    |            ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sum_r_xy` is never used
[INFO] [stdout]    --> crates/my_rust/src/ch5/lifetimes.rs:100:8
[INFO] [stdout]     |
[INFO] [stdout] 100 |     fn sum_r_xy(r: &i32, s: S) -> i32 {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_third` is never used
[INFO] [stdout]    --> crates/my_rust/src/ch5/lifetimes.rs:104:8
[INFO] [stdout]     |
[INFO] [stdout] 104 |     fn first_third(point: &[i32; 3]) -> (&i32, &i32) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StringTable` is never constructed
[INFO] [stdout]    --> crates/my_rust/src/ch5/lifetimes.rs:108:12
[INFO] [stdout]     |
[INFO] [stdout] 108 |     struct StringTable {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `find_by_prefix` is never used
[INFO] [stdout]    --> crates/my_rust/src/ch5/lifetimes.rs:113:12
[INFO] [stdout]     |
[INFO] [stdout] 111 |     impl StringTable {
[INFO] [stdout]     |     ---------------- method in this implementation
[INFO] [stdout] 112 |         // shorthand for: fn find_by_prefix<'a, 'b>(&'a self, prefix: &'b str) -> Option<&'a String>
[INFO] [stdout] 113 |         fn find_by_prefix(&self, prefix: &str) -> Option<&String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `GenericResult` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch7/mod.rs:16:6
[INFO] [stdout]    |
[INFO] [stdout] 16 | type GenericResult<T> = Result<T, GenericError>;
[INFO] [stdout]    |      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_numbers` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch7/mod.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn read_numbers(file: &mut dyn BufRead) -> GenericResult<Vec<i64>> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_error` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch7/mod.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn print_error(mut err: &dyn Error) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `move_all` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch7/mod.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn move_all(src: &Path, dst: &Path) -> io::Result<()> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `pirate_share` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch7/panics.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn pirate_share(total: u64, crew_size: usize) -> u64 {
[INFO] [stdout]   |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `new_map` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch9/mod.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn new_map(size: (usize, usize), pixels: Vec<u8>) -> GrayscaleMap {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `position` and `intent` are never read
[INFO] [stdout]   --> crates/my_rust/src/ch9/mod.rs:56:5
[INFO] [stdout]    |
[INFO] [stdout] 52 | struct Broom {
[INFO] [stdout]    |        ----- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 56 |     position: (f32, f32, f32),
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 57 |     intent: BroomIntent,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `DumpWater` is never constructed
[INFO] [stdout]   --> crates/my_rust/src/ch9/mod.rs:62:32
[INFO] [stdout]    |
[INFO] [stdout] 62 | enum BroomIntent { FetchWater, DumpWater }
[INFO] [stdout]    |      -----------               ^^^^^^^^^
[INFO] [stdout]    |      |
[INFO] [stdout]    |      variant in this enum
[INFO] [stdout]    |
[INFO] [stdout]    = note: `BroomIntent` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Ascii` is never constructed
[INFO] [stdout]   --> crates/my_rust/src/ch9/tuple_like_structs.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct Ascii(Vec<u8>);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Onesuch` is never constructed
[INFO] [stdout]   --> crates/my_rust/src/ch9/tuple_like_structs.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | struct Onesuch;
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch9/impls.rs:74:12
[INFO] [stdout]    |
[INFO] [stdout] 73 | impl Queue {
[INFO] [stdout]    | ---------- associated function in this implementation
[INFO] [stdout] 74 |     pub fn new() -> Queue {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Vector2` is never constructed
[INFO] [stdout]   --> crates/my_rust/src/ch9/impls.rs:80:12
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub struct Vector2 {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated constants `ZERO` and `UNIT` are never used
[INFO] [stdout]   --> crates/my_rust/src/ch9/impls.rs:86:11
[INFO] [stdout]    |
[INFO] [stdout] 85 | impl Vector2 {
[INFO] [stdout]    | ------------ associated constants in this implementation
[INFO] [stdout] 86 |     const ZERO: Vector2 = Vector2 { x: 0.0, y: 0.0 };
[INFO] [stdout]    |           ^^^^
[INFO] [stdout] 87 |     const UNIT: Vector2 = Vector2 { x: 1.0, y: 0.0 };
[INFO] [stdout]    |           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated constants `NAME` and `ID` are never used
[INFO] [stdout]   --> crates/my_rust/src/ch9/impls.rs:91:11
[INFO] [stdout]    |
[INFO] [stdout] 90 | impl Vector2 {
[INFO] [stdout]    | ------------ associated constants in this implementation
[INFO] [stdout] 91 |     const NAME: &'static str = "Vector2";
[INFO] [stdout]    |           ^^^^
[INFO] [stdout] 92 |     const ID: u32 = 18;
[INFO] [stdout]    |           ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> crates/my_rust/src/ch9/simpled_xml.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Node { tag: String,
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch9/simpled_xml.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | impl Node {
[INFO] [stdout]   | --------- associated function in this implementation
[INFO] [stdout] 6 |     fn new(tag: &str) -> Node {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `older` is never read
[INFO] [stdout]  --> crates/my_rust/src/ch9/generic_structs.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Queue<T> {
[INFO] [stdout]   |            ----- field in this struct
[INFO] [stdout] 2 |     older: Vec<T>,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_empty` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch9/generic_structs.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 6  | impl<T> Queue<T> {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 17 |     pub fn is_empty(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `sum` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch9/generic_structs.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | impl Queue<f64> {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 25 |
[INFO] [stdout] 26 |     fn sum(&self) -> f64 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `GrayscaleMap` is never constructed
[INFO] [stdout]   --> crates/my_rust/src/ch9/mod.rs:44:16
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub struct GrayscaleMap {
[INFO] [stdout]    |                ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `compare` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch10/mod.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn compare(n: i32, m: i32) -> Ordering {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `NotModified` and `NotFound` are never constructed
[INFO] [stdout]   --> crates/my_rust/src/ch10/mod.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     enum HttpStatus {
[INFO] [stdout]    |          ---------- variants in this enum
[INFO] [stdout] 21 |         Ok = 200,
[INFO] [stdout] 22 |         NotModified = 304,
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 23 |         NotFound = 404,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `http_status_from_u32` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch10/mod.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 |     fn http_status_from_u32(n: u32) -> Option<HttpStatus> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Seconds`, `Minutes`, `Days`, and `Months` are never constructed
[INFO] [stdout]   --> crates/my_rust/src/ch10/mod.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub enum TimeUnit {
[INFO] [stdout]    |          -------- variants in this enum
[INFO] [stdout] 47 |     Seconds,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 48 |     Minutes,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 49 |     Hours,
[INFO] [stdout] 50 |     Days,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 51 |     Months,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TimeUnit` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `plural` and `singular` are never used
[INFO] [stdout]   --> crates/my_rust/src/ch10/mod.rs:58:12
[INFO] [stdout]    |
[INFO] [stdout] 56 | impl TimeUnit {
[INFO] [stdout]    | ------------- methods in this implementation
[INFO] [stdout] 57 |     /// Return the plural noun for this time unit.
[INFO] [stdout] 58 |    pub  fn plural(self) -> &'static str {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |     pub fn singular(self) -> &'static str {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `JustNow` is never constructed
[INFO] [stdout]  --> crates/my_rust/src/ch10/enum_with_data.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub enum RoughTime {
[INFO] [stdout]   |          --------- variant in this enum
[INFO] [stdout] 6 |     InThePast(TimeUnit, u32),
[INFO] [stdout] 7 |     JustNow,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `RoughTime` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Null`, `Boolean`, `Number`, `String`, `Array`, and `Object` are never constructed
[INFO] [stdout]   --> crates/my_rust/src/ch10/enum_with_data.rs:41:13
[INFO] [stdout]    |
[INFO] [stdout] 41 | enum Json { Null,
[INFO] [stdout]    |      ----   ^^^^
[INFO] [stdout]    |      |
[INFO] [stdout]    |      variants in this enum
[INFO] [stdout] 42 |     Boolean(bool),
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 43 |     Number(f64),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 44 |     String(String),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 45 |     Array(Vec<Json>), Object(Box<HashMap<String, Json>>),
[INFO] [stdout]    |     ^^^^^             ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `element`, `left`, and `right` are never read
[INFO] [stdout]   --> crates/my_rust/src/ch10/generic_enums.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct TreeNode<T> {
[INFO] [stdout]    |        -------- fields in this struct
[INFO] [stdout] 11 |     element: T,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 12 |     left: BinaryTree<T>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 13 |     right: BinaryTree<T>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rough_time_to_english` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch10/generic_enums.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn rough_time_to_english(rt: RoughTime) -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `describe_point` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch10/matches.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 |     fn describe_point(x: i32, y: i32) -> &'static str {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `match_struct` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch10/matches.rs:44:4
[INFO] [stdout]    |
[INFO] [stdout] 44 | fn match_struct() {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `match_array` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch10/matches.rs:56:4
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn match_array() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `match_slice` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch10/matches.rs:67:4
[INFO] [stdout]    |
[INFO] [stdout] 67 | fn match_slice() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ref_pattern` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch10/matches.rs:79:4
[INFO] [stdout]    |
[INFO] [stdout] 79 | fn ref_pattern() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `match_guards` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch10/matches.rs:95:4
[INFO] [stdout]    |
[INFO] [stdout] 95 | fn match_guards(){
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `multiple_possibilities` is never used
[INFO] [stdout]    --> crates/my_rust/src/ch10/matches.rs:103:5
[INFO] [stdout]     |
[INFO] [stdout] 103 | fn  multiple_possibilities(){
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `BinaryTree` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch10/bin_tree.rs:2:6
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum BinaryTree<T> {
[INFO] [stdout]   |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TreeNode` is never constructed
[INFO] [stdout]  --> crates/my_rust/src/ch10/bin_tree.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct TreeNode<T> {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `add` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch10/bin_tree.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl<T: Ord> BinaryTree<T> {
[INFO] [stdout]    | -------------------------- method in this implementation
[INFO] [stdout] 15 |     fn add(&mut self, value: T) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `min` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch11/mod.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn min<T: Ord>(value1: T, value2: T) -> T {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `say_hello` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch11/generics.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn say_hello<W: Write>(out: &mut W) -> std::io::Result<()> { out.write_all(b"hello world\n")?;
[INFO] [stdout]   |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `collect_into_vector` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch11/iterators.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn collect_into_vector<I: Iterator>(iter: I) -> Vec<I::Item> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dump` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch11/iterators.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn dump<I>(iter: I) where I: Iterator, I::Item: Debug
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dump2` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch11/iterators.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn dump2(iter: &mut dyn Iterator<Item=String>) {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `cyclical_zip` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch11/iterators.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn cyclical_zip(v: Vec<u8>, u: Vec<u8>) -> impl Iterator<Item=u8> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print2` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch11/impl_traits.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn print2(val: impl Display) { println!("{}", val);
[INFO] [stdout]   |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_one` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch11/associated_constants.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn add_one<T: Float + Add<Output=T>>(value: T) -> T {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fib` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch11/associated_constants.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn fib<T: Float + Add<Output=T>>(n: usize) -> T {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch12/index_traits.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | impl<P: Default + Copy> Image<P> {
[INFO] [stdout]    | -------------------------------- associated function in this implementation
[INFO] [stdout] 35 |     /// Create a new image of the given size.
[INFO] [stdout] 36 |     fn new(width: usize, height: usize) -> Image<P> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `country` are never read
[INFO] [stdout]  --> crates/my_rust/src/ch14/closures.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct City {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] 2 |     name: String,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 3 |     population: i64,
[INFO] [stdout] 4 |     country: String,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sort_cities0` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch14/closures.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn sort_cities0(cities: &mut Vec<City>) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sort_cities` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch14/closures.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn sort_cities(cities: &mut Vec<City>) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `count_selected_cities` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch14/closures.rs:44:4
[INFO] [stdout]    |
[INFO] [stdout] 44 | fn count_selected_cities(cities: &Vec<City>, test_fn: fn(&City) -> bool) -> usize
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `call_twice` is never used
[INFO] [stdout]    --> crates/my_rust/src/ch14/closures.rs:111:4
[INFO] [stdout]     |
[INFO] [stdout] 111 | fn call_twice<F>(closure: F) where F: Fn() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Request` is never constructed
[INFO] [stdout]  --> crates/my_rust/src/ch14/callbacks.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Request {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Response` is never constructed
[INFO] [stdout]   --> crates/my_rust/src/ch14/callbacks.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Response {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BasicRouter` is never constructed
[INFO] [stdout]   --> crates/my_rust/src/ch14/callbacks.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct BasicRouter<C> where C: Fn(&Request) -> Response {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `add_route` are never used
[INFO] [stdout]   --> crates/my_rust/src/ch14/callbacks.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl<C> BasicRouter<C> where C: Fn(&Request) -> Response {
[INFO] [stdout]    | -------------------------------------------------------- associated items in this implementation
[INFO] [stdout] 22 |     /// Create an empty router.
[INFO] [stdout] 23 |     fn new() -> BasicRouter<C> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 27 |     fn add_route(&mut self, url: &str, callback: C) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FnPointerRouter` is never constructed
[INFO] [stdout]   --> crates/my_rust/src/ch14/callbacks.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 | struct FnPointerRouter {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `add_route` are never used
[INFO] [stdout]   --> crates/my_rust/src/ch14/callbacks.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 87 | impl FnPointerRouter {
[INFO] [stdout]    | -------------------- associated items in this implementation
[INFO] [stdout] 88 |     // Create an empty router.
[INFO] [stdout] 89 |     fn new() -> FnPointerRouter {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 92 |     fn add_route(&mut self, url: &str, callback: fn(&Request) -> Response) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `BoxedCallback` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch14/callbacks.rs:35:10
[INFO] [stdout]    |
[INFO] [stdout] 35 |     type BoxedCallback = Box<dyn Fn(&Request) -> Response>;
[INFO] [stdout]    |          ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BasicRouter` is never constructed
[INFO] [stdout]   --> crates/my_rust/src/ch14/callbacks.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 37 |     struct BasicRouter {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `add_route` are never used
[INFO] [stdout]   --> crates/my_rust/src/ch14/callbacks.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |     impl BasicRouter {
[INFO] [stdout]    |     ---------------- associated items in this implementation
[INFO] [stdout] 42 |         // Create an empty router.
[INFO] [stdout] 43 |         fn new() -> BasicRouter {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 50 |         fn add_route<C>(&mut self, url: &str, callback: C) where C: Fn(&Request) -> Response + 'static
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `handle_request` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch14/callbacks.rs:57:12
[INFO] [stdout]    |
[INFO] [stdout] 56 |     impl BasicRouter {
[INFO] [stdout]    |     ---------------- method in this implementation
[INFO] [stdout] 57 |         fn handle_request(&self, request: &Request) -> Response {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `triangle` is never used
[INFO] [stdout]  --> crates/my_rust/src/ch15/mod.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn triangle(n: i32) -> i32 {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `escape_time` is never used
[INFO] [stdout]   --> crates/my_rust/src/ch15/mod.rs:99:8
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn escape_time(c: Complex<f64>, limit: usize) -> Option<usize> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `try_fold` is never used
[INFO] [stdout]    --> crates/my_rust/src/ch15/mod.rs:677:4
[INFO] [stdout]     |
[INFO] [stdout] 677 | fn try_fold() {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]    --> crates/my_rust/src/ch15/mod.rs:551:8
[INFO] [stdout]     |
[INFO] [stdout] 551 |     fn main() {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_last` is never used
[INFO] [stdout]    --> crates/my_rust/src/ch15/mod.rs:658:8
[INFO] [stdout]     |
[INFO] [stdout] 658 |     fn test_last() {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> crates/my_rust/src/ch1/actix_gcd.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |         main().await;
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 34 |         let _ = main().await;
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 167 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 8.55s
[INFO] running `Command { std: "docker" "inspect" "282c5eed85fdb40ffa03315af6c0cf96a429399548c56286b27f755dfda747b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "282c5eed85fdb40ffa03315af6c0cf96a429399548c56286b27f755dfda747b8", kill_on_drop: false }`
[INFO] [stdout] 282c5eed85fdb40ffa03315af6c0cf96a429399548c56286b27f755dfda747b8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c78cec697117112f9a18b8930161f019ba64f0e65222db72e19e5bed6c250eb0
[INFO] running `Command { std: "docker" "start" "-a" "c78cec697117112f9a18b8930161f019ba64f0e65222db72e19e5bed6c250eb0", kill_on_drop: false }`
[INFO] [stderr] warning: unused imports: `get`, `post`
[INFO] [stderr]  --> crates/my_rust/src/ch1/actix_gcd.rs:1:17
[INFO] [stderr]   |
[INFO] [stderr] 1 | use actix_web::{get, post, web, App, HttpResponse, HttpServer};
[INFO] [stderr]   |                 ^^^  ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]   --> crates/my_rust/src/ch5/refs_values.rs:64:5
[INFO] [stderr]    |
[INFO] [stderr] 64 |     ;
[INFO] [stderr]    |     ^ help: remove this semicolon
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Deref`
[INFO] [stderr]   --> crates/my_rust/src/ch7/mod.rs:63:5
[INFO] [stderr]    |
[INFO] [stderr] 63 | use std::ops::Deref;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> crates/my_rust/src/ch14/closures.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 | /     /// An example of a test function. Note that the type of
[INFO] [stderr] 62 | |     /// this function is `fn(&City) -> bool`, the same as
[INFO] [stderr] 63 | |     /// the `test_fn` argument to `count_selected_cities`.
[INFO] [stderr]    | |_____-----------------------------------------------------^
[INFO] [stderr]    |       |
[INFO] [stderr]    |       rustdoc does not generate documentation for macro invocations
[INFO] [stderr]    |
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::binary_heap::PeekMut`
[INFO] [stderr]  --> crates/my_rust/src/ch15/bin_heaps.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     use std::collections::binary_heap::PeekMut;
[INFO] [stderr]   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `BTreeSet`
[INFO] [stderr]  --> crates/my_rust/src/ch15/sets.rs:1:24
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::collections::{BTreeSet, HashSet};
[INFO] [stderr]   |                        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]    --> crates/my_rust/src/ch15/mod.rs:487:9
[INFO] [stderr]     |
[INFO] [stderr] 487 | /         /**
[INFO] [stderr] 488 | |
[INFO] [stderr] 489 | |         impl<'a, I: Iterator + ?Sized> Iterator for &'a mut I { type Item = I::Item;
[INFO] [stderr] 490 | |         fn next(&mut self) -> Option<I::Item> {
[INFO] [stderr] ...   |
[INFO] [stderr] 494 | |
[INFO] [stderr] 495 | |          */
[INFO] [stderr]     | |___________^
[INFO] [stderr] 496 | /         let message = "To: jimb\r\n From: id\r\n
[INFO] [stderr] 497 | | \r\n
[INFO] [stderr] 498 | | Oooooh, donuts!!\r\n";
[INFO] [stderr]     | |______________________- rustdoc does not generate documentation for statements
[INFO] [stderr]     |
[INFO] [stderr]     = help: use `/* */` for a plain comment
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]   --> crates/my_rust/src/main.rs:97:9
[INFO] [stderr]    |
[INFO] [stderr] 97 |     use std::str::FromStr;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sa`
[INFO] [stderr]    --> crates/my_rust/src/ch3/sequence_values.rs:134:9
[INFO] [stderr]     |
[INFO] [stderr] 134 |     let sa: &[f64] = &a;
[INFO] [stderr]     |         ^^ help: if this is intentional, prefix it with an underscore: `_sa`
[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]    --> crates/my_rust/src/ch3/sequence_values.rs:123:9
[INFO] [stderr]     |
[INFO] [stderr] 123 |     let mut s2 = &mut [1, 2, 3];
[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: unused variable: `speech`
[INFO] [stderr]  --> crates/my_rust/src/ch3/strings.rs:4:9
[INFO] [stderr]   |
[INFO] [stderr] 4 |     let speech = "\"Ouch!\" said the well.\n";
[INFO] [stderr]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_speech`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `default_win_install_path`
[INFO] [stderr]   --> crates/my_rust/src/ch3/strings.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 |     let default_win_install_path = r"C:\Program Files\Gorillas";
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_default_win_install_path`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `pattern`
[INFO] [stderr]   --> crates/my_rust/src/ch3/strings.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |     let pattern = Regex::new(r"\d+(\.\d+)*");
[INFO] [stderr]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_pattern`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `oodles`
[INFO] [stderr]   --> crates/my_rust/src/ch3/strings.rs:30:9
[INFO] [stderr]    |
[INFO] [stderr] 30 |     let oodles = &noodles[1..];
[INFO] [stderr]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_oodles`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `poodles`
[INFO] [stderr]   --> crates/my_rust/src/ch3/strings.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |     let poodles = "ಠ_ಠ";
[INFO] [stderr]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_poodles`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]   --> crates/my_rust/src/ch3/strings.rs:48:23
[INFO] [stderr]    |
[INFO] [stderr] 48 |     fn some_string_fn(s: &str) {}
[INFO] [stderr]    |                       ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `i` is assigned to, but never used
[INFO] [stderr]   --> crates/my_rust/src/ch3/mod.rs:67:13
[INFO] [stderr]    |
[INFO] [stderr] 67 |     let mut i = 1;
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_i` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]   --> crates/my_rust/src/ch4/ownership.rs:44:9
[INFO] [stderr]    |
[INFO] [stderr] 44 |     let t = s.clone();
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `u`
[INFO] [stderr]   --> crates/my_rust/src/ch4/ownership.rs:45:9
[INFO] [stderr]    |
[INFO] [stderr] 45 |     let u = s.clone();
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]   --> crates/my_rust/src/ch5/lifetimes.rs:87:27
[INFO] [stderr]    |
[INFO] [stderr] 87 |     fn f0<'a>(r: &'a i32, s: &'a i32) -> &'a i32 { r } // perhaps too tight
[INFO] [stderr]    |                           ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]   --> crates/my_rust/src/ch5/lifetimes.rs:88:30
[INFO] [stderr]    |
[INFO] [stderr] 88 |     fn f<'a, 'b>(r: &'a i32, s: &'b i32) -> &'a i32 { r } // looser
[INFO] [stderr]    |                              ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `err`
[INFO] [stderr]   --> crates/my_rust/src/ch7/mod.rs:24:16
[INFO] [stderr]    |
[INFO] [stderr] 24 |     if let Err(err) = real_main() {
[INFO] [stderr]    |                ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `q`
[INFO] [stderr]   --> crates/my_rust/src/ch9/generic_structs.rs:34:13
[INFO] [stderr]    |
[INFO] [stderr] 34 |     let mut q = Queue::<char>::new();
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_q`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> crates/my_rust/src/ch9/generic_structs.rs:34:9
[INFO] [stderr]    |
[INFO] [stderr] 34 |     let mut q = Queue::<char>::new();
[INFO] [stderr]    |         ----^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `four_score_and_seven_years_ago`
[INFO] [stderr]   --> crates/my_rust/src/ch10/enum_with_data.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 |     let four_score_and_seven_years_ago = RoughTime::InThePast(TimeUnit::Years, 4 * 20 + 7);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_four_score_and_seven_years_ago`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `three_hours_from_now`
[INFO] [stderr]   --> crates/my_rust/src/ch10/enum_with_data.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |     let three_hours_from_now = RoughTime::InTheFuture(TimeUnit::Hours, 3);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_three_hours_from_now`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `mars_tree`
[INFO] [stderr]   --> crates/my_rust/src/ch10/generic_enums.rs:30:9
[INFO] [stderr]    |
[INFO] [stderr] 30 |     let mars_tree = NonEmpty(Box::new(TreeNode {
[INFO] [stderr]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mars_tree`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `writer`
[INFO] [stderr]  --> crates/my_rust/src/ch11/trait_objects.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let writer: &mut dyn Write = &mut buf; // ok
[INFO] [stderr]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `a` is assigned to, but never used
[INFO] [stderr]   --> crates/my_rust/src/ch13/drops.rs:20:17
[INFO] [stderr]    |
[INFO] [stderr] 20 |         let mut a = Appellation {
[INFO] [stderr]    |                 ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_a` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `a` is never read
[INFO] [stderr]   --> crates/my_rust/src/ch13/drops.rs:26:9
[INFO] [stderr]    |
[INFO] [stderr] 26 |         a = Appellation { name: "Hera".to_string(), nicknames: vec![] };
[INFO] [stderr]    |         ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]    --> crates/my_rust/src/ch14/closures.rs:119:9
[INFO] [stderr]     |
[INFO] [stderr] 119 |     let f = || drop(my_str);
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `incr`
[INFO] [stderr]    --> crates/my_rust/src/ch14/closures.rs:124:9
[INFO] [stderr]     |
[INFO] [stderr] 124 |     let incr = || {
[INFO] [stderr]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_incr`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `two`
[INFO] [stderr]   --> crates/my_rust/src/ch14/callbacks.rs:80:9
[INFO] [stderr]    |
[INFO] [stderr] 80 |     let two = closure_ptr(1); // 2
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_two`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `set`
[INFO] [stderr]   --> crates/my_rust/src/ch15/sets.rs:16:9
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let set: HashSet<&str> = large_vector.into_iter().collect();
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_set`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lengths`
[INFO] [stderr]   --> crates/my_rust/src/ch15/mod.rs:90:9
[INFO] [stderr]    |
[INFO] [stderr] 90 |     let lengths: Vec<f64> =
[INFO] [stderr]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_lengths`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> crates/my_rust/src/ch15/mod.rs:175:13
[INFO] [stderr]     |
[INFO] [stderr] 175 |         let mut v = v.clone();
[INFO] [stderr]     |             ----^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> crates/my_rust/src/ch15/mod.rs:182:13
[INFO] [stderr]     |
[INFO] [stderr] 182 |         let mut v = v.clone();
[INFO] [stderr]     |             ----^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> crates/my_rust/src/ch15/mod.rs:186:13
[INFO] [stderr]     |
[INFO] [stderr] 186 |         let mut v = v.clone();
[INFO] [stderr]     |             ----^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `iter_rouce`
[INFO] [stderr]    --> crates/my_rust/src/ch15/mod.rs:198:13
[INFO] [stderr]     |
[INFO] [stderr] 198 |         let iter_rouce = s.chars();
[INFO] [stderr]     |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_iter_rouce`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `arg`
[INFO] [stderr]    --> crates/my_rust/src/ch15/mod.rs:354:13
[INFO] [stderr]     |
[INFO] [stderr] 354 |         for arg in std::env::args().skip(1) {
[INFO] [stderr]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_arg`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `numbers`
[INFO] [stderr]    --> crates/my_rust/src/ch15/mod.rs:579:13
[INFO] [stderr]     |
[INFO] [stderr] 579 |         let numbers = [1.0, 4.0, std::f64::NAN, 2.0];
[INFO] [stderr]     |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_numbers`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `args`
[INFO] [stderr]    --> crates/my_rust/src/ch15/mod.rs:697:13
[INFO] [stderr]     |
[INFO] [stderr] 697 |         let args: HashSet<String> = std::env::args().collect();
[INFO] [stderr]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `args`
[INFO] [stderr]    --> crates/my_rust/src/ch15/mod.rs:698:13
[INFO] [stderr]     |
[INFO] [stderr] 698 |         let args: BTreeSet<String> = std::env::args().collect();
[INFO] [stderr]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `args`
[INFO] [stderr]    --> crates/my_rust/src/ch15/mod.rs:699:13
[INFO] [stderr]     |
[INFO] [stderr] 699 |         let args: LinkedList<String> = std::env::args().collect();
[INFO] [stderr]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `args`
[INFO] [stderr]    --> crates/my_rust/src/ch15/mod.rs:701:13
[INFO] [stderr]     |
[INFO] [stderr] 701 |         let args: HashMap<String, usize> = std::env::args().zip(0..).collect();
[INFO] [stderr]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `args`
[INFO] [stderr]    --> crates/my_rust/src/ch15/mod.rs:702:13
[INFO] [stderr]     |
[INFO] [stderr] 702 |         let args: BTreeMap<String, usize> = std::env::args().zip(0..).collect();
[INFO] [stderr]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `numbers`
[INFO] [stderr]  --> crates/my_rust/src/ch16/vecs.rs:6:13
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut numbers: Vec<i32> = vec![];
[INFO] [stderr]   |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_numbers`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `words`
[INFO] [stderr]  --> crates/my_rust/src/ch16/vecs.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let words = vec!["step", "on", "no", "pets"];
[INFO] [stderr]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_words`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `buffer`
[INFO] [stderr]  --> crates/my_rust/src/ch16/vecs.rs:9:13
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let mut buffer = vec![0u8; 1024]; // 1024 zeroed-out bytes
[INFO] [stderr]   |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_buffer`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> crates/my_rust/src/ch16/vecs.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut numbers: Vec<i32> = vec![];
[INFO] [stderr]   |         ----^^^^^^^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> crates/my_rust/src/ch16/vecs.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let mut buffer = vec![0u8; 1024]; // 1024 zeroed-out bytes
[INFO] [stderr]   |         ----^^^^^^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]    --> crates/my_rust/src/ch16/vecs.rs:130:9
[INFO] [stderr]     |
[INFO] [stderr] 130 |     let a = &v[i];
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]    --> crates/my_rust/src/ch16/vecs.rs:131:9
[INFO] [stderr]     |
[INFO] [stderr] 131 |     let b = &v[j];
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `front_half`
[INFO] [stderr]    --> crates/my_rust/src/ch16/vecs.rs:133:9
[INFO] [stderr]     |
[INFO] [stderr] 133 |     let front_half = &v[..mid];
[INFO] [stderr]     |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_front_half`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `back_half`
[INFO] [stderr]    --> crates/my_rust/src/ch16/vecs.rs:134:9
[INFO] [stderr]     |
[INFO] [stderr] 134 |     let back_half = &v[mid..];
[INFO] [stderr]     |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_back_half`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> crates/my_rust/src/ch16/vecs.rs:208:13
[INFO] [stderr]     |
[INFO] [stderr] 208 |         let mut students = ["zhang san", "wang ma zi", "li si"];
[INFO] [stderr]     |             ----^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `index`
[INFO] [stderr]    --> crates/my_rust/src/ch16/vecs.rs:244:10
[INFO] [stderr]     |
[INFO] [stderr] 244 |     for (index, &val) in my_vec.iter().enumerate() {
[INFO] [stderr]     |          ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]   --> crates/my_rust/src/ch16/deques.rs:43:9
[INFO] [stderr]    |
[INFO] [stderr] 43 |     let v = VecDeque::from(vec![1, 2, 3, 4]);
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> crates/my_rust/src/ch16/deques.rs:30:9
[INFO] [stderr]    |
[INFO] [stderr] 30 |     let mut f = my_deck.front_mut().unwrap();
[INFO] [stderr]    |         ----^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: function `first` is never used
[INFO] [stderr]    --> crates/my_rust/src/main.rs:136:4
[INFO] [stderr]     |
[INFO] [stderr] 136 | fn first<T>(v: &Vec<T>) -> Option<&T> {
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `square_loop` is never used
[INFO] [stderr]  --> crates/my_rust/src/ch1/mandelbrot.rs:1:4
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn square_loop(mut x: f64) {
[INFO] [stderr]   |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `square_add_loop` is never used
[INFO] [stderr]  --> crates/my_rust/src/ch1/mandelbrot.rs:7:4
[INFO] [stderr]   |
[INFO] [stderr] 7 | fn square_add_loop(c: f64) {
[INFO] [stderr]   |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `complex_square_add_loop` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch1/mandelbrot.rs:16:4
[INFO] [stderr]    |
[INFO] [stderr] 16 | fn complex_square_add_loop(c: Complex<f64>) {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `main` is never used
[INFO] [stderr]    --> crates/my_rust/src/ch1/mandelbrot.rs:157:12
[INFO] [stderr]     |
[INFO] [stderr] 157 |     pub fn main() {
[INFO] [stderr]     |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `build_vector` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch3/mod.rs:26:4
[INFO] [stderr]    |
[INFO] [stderr] 26 | fn build_vector() -> Vec<i16> {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `build_vector2` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch3/mod.rs:33:4
[INFO] [stderr]    |
[INFO] [stderr] 33 | fn build_vector2() -> Vec<i16> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `ambiguous_numeric_type` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch3/mod.rs:59:4
[INFO] [stderr]    |
[INFO] [stderr] 59 | fn ambiguous_numeric_type() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `panics_in_debug_build` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch3/mod.rs:66:4
[INFO] [stderr]    |
[INFO] [stderr] 66 | fn panics_in_debug_build() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `panics_in_any_build` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch3/mod.rs:73:4
[INFO] [stderr]    |
[INFO] [stderr] 73 | fn panics_in_any_build() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]  --> crates/my_rust/src/ch3/floating_point_types.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn run() {
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `main` is never used
[INFO] [stderr]  --> crates/my_rust/src/ch3/floating_point_types.rs:5:4
[INFO] [stderr]   |
[INFO] [stderr] 5 | fn main() {}
[INFO] [stderr]   |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_split_at2` is never used
[INFO] [stderr]  --> crates/my_rust/src/ch3/tuples.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | }fn test_split_at2() {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `new_pixel_buffer` is never used
[INFO] [stderr]    --> crates/my_rust/src/ch3/sequence_values.rs:115:4
[INFO] [stderr]     |
[INFO] [stderr] 115 | fn new_pixel_buffer(rows: usize, cols: usize) -> Vec<u8> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `literals` is never used
[INFO] [stderr]  --> crates/my_rust/src/ch3/strings.rs:3:4
[INFO] [stderr]   |
[INFO] [stderr] 3 | fn literals() {
[INFO] [stderr]   |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `some_string_fn` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch3/strings.rs:48:8
[INFO] [stderr]    |
[INFO] [stderr] 48 |     fn some_string_fn(s: &str) {}
[INFO] [stderr]    |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `print_padovan` is never used
[INFO] [stderr]  --> crates/my_rust/src/ch4/ownership.rs:1:4
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn print_padovan() {
[INFO] [stderr]   |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `example1` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch4/ownership.rs:13:4
[INFO] [stderr]    |
[INFO] [stderr] 13 | fn example1() {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `example2` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch4/ownership.rs:19:4
[INFO] [stderr]    |
[INFO] [stderr] 19 | fn example2() {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `deep_copy` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch4/ownership.rs:42:4
[INFO] [stderr]    |
[INFO] [stderr] 42 | fn deep_copy() {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `example3` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch4/ownership.rs:48:4
[INFO] [stderr]    |
[INFO] [stderr] 48 | fn example3() {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `birth` is never read
[INFO] [stderr]   --> crates/my_rust/src/ch4/ownership.rs:93:9
[INFO] [stderr]    |
[INFO] [stderr] 91 |     struct Person {
[INFO] [stderr]    |            ------ field in this struct
[INFO] [stderr] 92 |         name: Option<String>,
[INFO] [stderr] 93 |         birth: i32,
[INFO] [stderr]    |         ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `show1` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch5/refs_values.rs:14:4
[INFO] [stderr]    |
[INFO] [stderr] 14 | fn show1(table: Table) {
[INFO] [stderr]    |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `sort_works` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch5/refs_values.rs:37:4
[INFO] [stderr]    |
[INFO] [stderr] 37 | fn sort_works(table: &mut Table) {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `bechdel_pass` is never read
[INFO] [stderr]   --> crates/my_rust/src/ch5/refs_values.rs:62:9
[INFO] [stderr]    |
[INFO] [stderr] 60 |     struct Anime {
[INFO] [stderr]    |            ----- field in this struct
[INFO] [stderr] 61 |         name: &'static str,
[INFO] [stderr] 62 |         bechdel_pass: bool,
[INFO] [stderr]    |         ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `implicitly_borrow` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch5/refs_values.rs:73:4
[INFO] [stderr]    |
[INFO] [stderr] 73 | fn implicitly_borrow() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `references_to_references` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch5/refs_values.rs:90:4
[INFO] [stderr]    |
[INFO] [stderr] 90 | fn references_to_references() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `app_name` is never read
[INFO] [stderr]  --> crates/my_rust/src/ch5/lifetimes.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | struct Config {
[INFO] [stderr]   |        ------ field in this struct
[INFO] [stderr] 3 |     app_name: String,
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `Config` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: field `config` is never read
[INFO] [stderr]  --> crates/my_rust/src/ch5/lifetimes.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | struct App<'a> {
[INFO] [stderr]   |        --- field in this struct
[INFO] [stderr] 8 |     config: &'a Config,
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `App` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: function `ref_args` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch5/lifetimes.rs:27:4
[INFO] [stderr]    |
[INFO] [stderr] 27 | fn ref_args() {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `S` is never constructed
[INFO] [stderr]   --> crates/my_rust/src/ch5/lifetimes.rs:73:12
[INFO] [stderr]    |
[INFO] [stderr] 73 |     struct S<'a> {
[INFO] [stderr]    |            ^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `D` is never constructed
[INFO] [stderr]   --> crates/my_rust/src/ch5/lifetimes.rs:77:12
[INFO] [stderr]    |
[INFO] [stderr] 77 |     struct D<'a> {
[INFO] [stderr]    |            ^
[INFO] [stderr] 
[INFO] [stderr] warning: function `distinct_lifetime` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch5/lifetimes.rs:82:4
[INFO] [stderr]    |
[INFO] [stderr] 82 | fn distinct_lifetime() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `S` is never constructed
[INFO] [stderr]   --> crates/my_rust/src/ch5/lifetimes.rs:94:12
[INFO] [stderr]    |
[INFO] [stderr] 94 |     struct S<'a, 'b> {
[INFO] [stderr]    |            ^
[INFO] [stderr] 
[INFO] [stderr] warning: function `sum_r_xy` is never used
[INFO] [stderr]    --> crates/my_rust/src/ch5/lifetimes.rs:100:8
[INFO] [stderr]     |
[INFO] [stderr] 100 |     fn sum_r_xy(r: &i32, s: S) -> i32 {
[INFO] [stderr]     |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `first_third` is never used
[INFO] [stderr]    --> crates/my_rust/src/ch5/lifetimes.rs:104:8
[INFO] [stderr]     |
[INFO] [stderr] 104 |     fn first_third(point: &[i32; 3]) -> (&i32, &i32) {
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `StringTable` is never constructed
[INFO] [stderr]    --> crates/my_rust/src/ch5/lifetimes.rs:108:12
[INFO] [stderr]     |
[INFO] [stderr] 108 |     struct StringTable {
[INFO] [stderr]     |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `find_by_prefix` is never used
[INFO] [stderr]    --> crates/my_rust/src/ch5/lifetimes.rs:113:12
[INFO] [stderr]     |
[INFO] [stderr] 111 |     impl StringTable {
[INFO] [stderr]     |     ---------------- method in this implementation
[INFO] [stderr] 112 |         // shorthand for: fn find_by_prefix<'a, 'b>(&'a self, prefix: &'b str) -> Option<&'a String>
[INFO] [stderr] 113 |         fn find_by_prefix(&self, prefix: &str) -> Option<&String> {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias `GenericResult` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch7/mod.rs:16:6
[INFO] [stderr]    |
[INFO] [stderr] 16 | type GenericResult<T> = Result<T, GenericError>;
[INFO] [stderr]    |      ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `read_numbers` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch7/mod.rs:39:4
[INFO] [stderr]    |
[INFO] [stderr] 39 | fn read_numbers(file: &mut dyn BufRead) -> GenericResult<Vec<i64>> {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `print_error` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch7/mod.rs:52:4
[INFO] [stderr]    |
[INFO] [stderr] 52 | fn print_error(mut err: &dyn Error) {
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `move_all` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch7/mod.rs:66:4
[INFO] [stderr]    |
[INFO] [stderr] 66 | fn move_all(src: &Path, dst: &Path) -> io::Result<()> {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `pirate_share` is never used
[INFO] [stderr]  --> crates/my_rust/src/ch7/panics.rs:1:4
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn pirate_share(total: u64, crew_size: usize) -> u64 {
[INFO] [stderr]   |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `new_map` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch9/mod.rs:37:4
[INFO] [stderr]    |
[INFO] [stderr] 37 | fn new_map(size: (usize, usize), pixels: Vec<u8>) -> GrayscaleMap {
[INFO] [stderr]    |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: fields `position` and `intent` are never read
[INFO] [stderr]   --> crates/my_rust/src/ch9/mod.rs:56:5
[INFO] [stderr]    |
[INFO] [stderr] 52 | struct Broom {
[INFO] [stderr]    |        ----- fields in this struct
[INFO] [stderr] ...
[INFO] [stderr] 56 |     position: (f32, f32, f32),
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 57 |     intent: BroomIntent,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant `DumpWater` is never constructed
[INFO] [stderr]   --> crates/my_rust/src/ch9/mod.rs:62:32
[INFO] [stderr]    |
[INFO] [stderr] 62 | enum BroomIntent { FetchWater, DumpWater }
[INFO] [stderr]    |      -----------               ^^^^^^^^^
[INFO] [stderr]    |      |
[INFO] [stderr]    |      variant in this enum
[INFO] [stderr]    |
[INFO] [stderr]    = note: `BroomIntent` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Ascii` is never constructed
[INFO] [stderr]   --> crates/my_rust/src/ch9/tuple_like_structs.rs:12:8
[INFO] [stderr]    |
[INFO] [stderr] 12 | struct Ascii(Vec<u8>);
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Onesuch` is never constructed
[INFO] [stderr]   --> crates/my_rust/src/ch9/tuple_like_structs.rs:15:8
[INFO] [stderr]    |
[INFO] [stderr] 15 | struct Onesuch;
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch9/impls.rs:74:12
[INFO] [stderr]    |
[INFO] [stderr] 73 | impl Queue {
[INFO] [stderr]    | ---------- associated function in this implementation
[INFO] [stderr] 74 |     pub fn new() -> Queue {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Vector2` is never constructed
[INFO] [stderr]   --> crates/my_rust/src/ch9/impls.rs:80:12
[INFO] [stderr]    |
[INFO] [stderr] 80 | pub struct Vector2 {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated constants `ZERO` and `UNIT` are never used
[INFO] [stderr]   --> crates/my_rust/src/ch9/impls.rs:86:11
[INFO] [stderr]    |
[INFO] [stderr] 85 | impl Vector2 {
[INFO] [stderr]    | ------------ associated constants in this implementation
[INFO] [stderr] 86 |     const ZERO: Vector2 = Vector2 { x: 0.0, y: 0.0 };
[INFO] [stderr]    |           ^^^^
[INFO] [stderr] 87 |     const UNIT: Vector2 = Vector2 { x: 1.0, y: 0.0 };
[INFO] [stderr]    |           ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated constants `NAME` and `ID` are never used
[INFO] [stderr]   --> crates/my_rust/src/ch9/impls.rs:91:11
[INFO] [stderr]    |
[INFO] [stderr] 90 | impl Vector2 {
[INFO] [stderr]    | ------------ associated constants in this implementation
[INFO] [stderr] 91 |     const NAME: &'static str = "Vector2";
[INFO] [stderr]    |           ^^^^
[INFO] [stderr] 92 |     const ID: u32 = 18;
[INFO] [stderr]    |           ^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Node` is never constructed
[INFO] [stderr]  --> crates/my_rust/src/ch9/simpled_xml.rs:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 | struct Node { tag: String,
[INFO] [stderr]   |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]  --> crates/my_rust/src/ch9/simpled_xml.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 5 | impl Node {
[INFO] [stderr]   | --------- associated function in this implementation
[INFO] [stderr] 6 |     fn new(tag: &str) -> Node {
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `older` is never read
[INFO] [stderr]  --> crates/my_rust/src/ch9/generic_structs.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Queue<T> {
[INFO] [stderr]   |            ----- field in this struct
[INFO] [stderr] 2 |     older: Vec<T>,
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `is_empty` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch9/generic_structs.rs:17:12
[INFO] [stderr]    |
[INFO] [stderr] 6  | impl<T> Queue<T> {
[INFO] [stderr]    | ---------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 17 |     pub fn is_empty(&self) -> bool {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `sum` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch9/generic_structs.rs:26:8
[INFO] [stderr]    |
[INFO] [stderr] 24 | impl Queue<f64> {
[INFO] [stderr]    | --------------- method in this implementation
[INFO] [stderr] 25 |
[INFO] [stderr] 26 |     fn sum(&self) -> f64 {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `GrayscaleMap` is never constructed
[INFO] [stderr]   --> crates/my_rust/src/ch9/mod.rs:44:16
[INFO] [stderr]    |
[INFO] [stderr] 44 |     pub struct GrayscaleMap {
[INFO] [stderr]    |                ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `compare` is never used
[INFO] [stderr]  --> crates/my_rust/src/ch10/mod.rs:8:4
[INFO] [stderr]   |
[INFO] [stderr] 8 | fn compare(n: i32, m: i32) -> Ordering {
[INFO] [stderr]   |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variants `NotModified` and `NotFound` are never constructed
[INFO] [stderr]   --> crates/my_rust/src/ch10/mod.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |     enum HttpStatus {
[INFO] [stderr]    |          ---------- variants in this enum
[INFO] [stderr] 21 |         Ok = 200,
[INFO] [stderr] 22 |         NotModified = 304,
[INFO] [stderr]    |         ^^^^^^^^^^^
[INFO] [stderr] 23 |         NotFound = 404,
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `http_status_from_u32` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch10/mod.rs:34:8
[INFO] [stderr]    |
[INFO] [stderr] 34 |     fn http_status_from_u32(n: u32) -> Option<HttpStatus> {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Seconds`, `Minutes`, `Days`, and `Months` are never constructed
[INFO] [stderr]   --> crates/my_rust/src/ch10/mod.rs:47:5
[INFO] [stderr]    |
[INFO] [stderr] 46 | pub enum TimeUnit {
[INFO] [stderr]    |          -------- variants in this enum
[INFO] [stderr] 47 |     Seconds,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 48 |     Minutes,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 49 |     Hours,
[INFO] [stderr] 50 |     Days,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 51 |     Months,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `TimeUnit` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: methods `plural` and `singular` are never used
[INFO] [stderr]   --> crates/my_rust/src/ch10/mod.rs:58:12
[INFO] [stderr]    |
[INFO] [stderr] 56 | impl TimeUnit {
[INFO] [stderr]    | ------------- methods in this implementation
[INFO] [stderr] 57 |     /// Return the plural noun for this time unit.
[INFO] [stderr] 58 |    pub  fn plural(self) -> &'static str {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 69 |     pub fn singular(self) -> &'static str {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant `JustNow` is never constructed
[INFO] [stderr]  --> crates/my_rust/src/ch10/enum_with_data.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub enum RoughTime {
[INFO] [stderr]   |          --------- variant in this enum
[INFO] [stderr] 6 |     InThePast(TimeUnit, u32),
[INFO] [stderr] 7 |     JustNow,
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `RoughTime` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Null`, `Boolean`, `Number`, `String`, `Array`, and `Object` are never constructed
[INFO] [stderr]   --> crates/my_rust/src/ch10/enum_with_data.rs:41:13
[INFO] [stderr]    |
[INFO] [stderr] 41 | enum Json { Null,
[INFO] [stderr]    |      ----   ^^^^
[INFO] [stderr]    |      |
[INFO] [stderr]    |      variants in this enum
[INFO] [stderr] 42 |     Boolean(bool),
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 43 |     Number(f64),
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 44 |     String(String),
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 45 |     Array(Vec<Json>), Object(Box<HashMap<String, Json>>),
[INFO] [stderr]    |     ^^^^^             ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: fields `element`, `left`, and `right` are never read
[INFO] [stderr]   --> crates/my_rust/src/ch10/generic_enums.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | struct TreeNode<T> {
[INFO] [stderr]    |        -------- fields in this struct
[INFO] [stderr] 11 |     element: T,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 12 |     left: BinaryTree<T>,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 13 |     right: BinaryTree<T>,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `rough_time_to_english` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch10/generic_enums.rs:39:4
[INFO] [stderr]    |
[INFO] [stderr] 39 | fn rough_time_to_english(rt: RoughTime) -> String {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `describe_point` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch10/matches.rs:31:8
[INFO] [stderr]    |
[INFO] [stderr] 31 |     fn describe_point(x: i32, y: i32) -> &'static str {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `match_struct` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch10/matches.rs:44:4
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn match_struct() {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `match_array` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch10/matches.rs:56:4
[INFO] [stderr]    |
[INFO] [stderr] 56 | fn match_array() {
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `match_slice` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch10/matches.rs:67:4
[INFO] [stderr]    |
[INFO] [stderr] 67 | fn match_slice() {
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `ref_pattern` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch10/matches.rs:79:4
[INFO] [stderr]    |
[INFO] [stderr] 79 | fn ref_pattern() {
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `match_guards` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch10/matches.rs:95:4
[INFO] [stderr]    |
[INFO] [stderr] 95 | fn match_guards(){
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `multiple_possibilities` is never used
[INFO] [stderr]    --> crates/my_rust/src/ch10/matches.rs:103:5
[INFO] [stderr]     |
[INFO] [stderr] 103 | fn  multiple_possibilities(){
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `BinaryTree` is never used
[INFO] [stderr]  --> crates/my_rust/src/ch10/bin_tree.rs:2:6
[INFO] [stderr]   |
[INFO] [stderr] 2 | enum BinaryTree<T> {
[INFO] [stderr]   |      ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `TreeNode` is never constructed
[INFO] [stderr]  --> crates/my_rust/src/ch10/bin_tree.rs:8:8
[INFO] [stderr]   |
[INFO] [stderr] 8 | struct TreeNode<T> {
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `add` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch10/bin_tree.rs:15:8
[INFO] [stderr]    |
[INFO] [stderr] 14 | impl<T: Ord> BinaryTree<T> {
[INFO] [stderr]    | -------------------------- method in this implementation
[INFO] [stderr] 15 |     fn add(&mut self, value: T) {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `min` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch11/mod.rs:27:4
[INFO] [stderr]    |
[INFO] [stderr] 27 | fn min<T: Ord>(value1: T, value2: T) -> T {
[INFO] [stderr]    |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `say_hello` is never used
[INFO] [stderr]  --> crates/my_rust/src/ch11/generics.rs:3:4
[INFO] [stderr]   |
[INFO] [stderr] 3 | fn say_hello<W: Write>(out: &mut W) -> std::io::Result<()> { out.write_all(b"hello world\n")?;
[INFO] [stderr]   |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `collect_into_vector` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch11/iterators.rs:12:4
[INFO] [stderr]    |
[INFO] [stderr] 12 | fn collect_into_vector<I: Iterator>(iter: I) -> Vec<I::Item> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `dump` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch11/iterators.rs:23:4
[INFO] [stderr]    |
[INFO] [stderr] 23 | fn dump<I>(iter: I) where I: Iterator, I::Item: Debug
[INFO] [stderr]    |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `dump2` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch11/iterators.rs:30:4
[INFO] [stderr]    |
[INFO] [stderr] 30 | fn dump2(iter: &mut dyn Iterator<Item=String>) {
[INFO] [stderr]    |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `cyclical_zip` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch11/iterators.rs:37:4
[INFO] [stderr]    |
[INFO] [stderr] 37 | fn cyclical_zip(v: Vec<u8>, u: Vec<u8>) -> impl Iterator<Item=u8> {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `print2` is never used
[INFO] [stderr]  --> crates/my_rust/src/ch11/impl_traits.rs:7:4
[INFO] [stderr]   |
[INFO] [stderr] 7 | fn print2(val: impl Display) { println!("{}", val);
[INFO] [stderr]   |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `add_one` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch11/associated_constants.rs:23:4
[INFO] [stderr]    |
[INFO] [stderr] 23 | fn add_one<T: Float + Add<Output=T>>(value: T) -> T {
[INFO] [stderr]    |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `fib` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch11/associated_constants.rs:27:4
[INFO] [stderr]    |
[INFO] [stderr] 27 | fn fib<T: Float + Add<Output=T>>(n: usize) -> T {
[INFO] [stderr]    |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch12/index_traits.rs:36:8
[INFO] [stderr]    |
[INFO] [stderr] 34 | impl<P: Default + Copy> Image<P> {
[INFO] [stderr]    | -------------------------------- associated function in this implementation
[INFO] [stderr] 35 |     /// Create a new image of the given size.
[INFO] [stderr] 36 |     fn new(width: usize, height: usize) -> Image<P> {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: fields `name` and `country` are never read
[INFO] [stderr]  --> crates/my_rust/src/ch14/closures.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct City {
[INFO] [stderr]   |        ---- fields in this struct
[INFO] [stderr] 2 |     name: String,
[INFO] [stderr]   |     ^^^^
[INFO] [stderr] 3 |     population: i64,
[INFO] [stderr] 4 |     country: String,
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `sort_cities0` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch14/closures.rs:17:4
[INFO] [stderr]    |
[INFO] [stderr] 17 | fn sort_cities0(cities: &mut Vec<City>) {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `sort_cities` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch14/closures.rs:21:4
[INFO] [stderr]    |
[INFO] [stderr] 21 | fn sort_cities(cities: &mut Vec<City>) {
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `count_selected_cities` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch14/closures.rs:44:4
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn count_selected_cities(cities: &Vec<City>, test_fn: fn(&City) -> bool) -> usize
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `call_twice` is never used
[INFO] [stderr]    --> crates/my_rust/src/ch14/closures.rs:111:4
[INFO] [stderr]     |
[INFO] [stderr] 111 | fn call_twice<F>(closure: F) where F: Fn() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Request` is never constructed
[INFO] [stderr]  --> crates/my_rust/src/ch14/callbacks.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | struct Request {
[INFO] [stderr]   |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Response` is never constructed
[INFO] [stderr]   --> crates/my_rust/src/ch14/callbacks.rs:10:8
[INFO] [stderr]    |
[INFO] [stderr] 10 | struct Response {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `BasicRouter` is never constructed
[INFO] [stderr]   --> crates/my_rust/src/ch14/callbacks.rs:16:8
[INFO] [stderr]    |
[INFO] [stderr] 16 | struct BasicRouter<C> where C: Fn(&Request) -> Response {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new` and `add_route` are never used
[INFO] [stderr]   --> crates/my_rust/src/ch14/callbacks.rs:23:8
[INFO] [stderr]    |
[INFO] [stderr] 21 | impl<C> BasicRouter<C> where C: Fn(&Request) -> Response {
[INFO] [stderr]    | -------------------------------------------------------- associated items in this implementation
[INFO] [stderr] 22 |     /// Create an empty router.
[INFO] [stderr] 23 |     fn new() -> BasicRouter<C> {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 27 |     fn add_route(&mut self, url: &str, callback: C) {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `FnPointerRouter` is never constructed
[INFO] [stderr]   --> crates/my_rust/src/ch14/callbacks.rs:83:8
[INFO] [stderr]    |
[INFO] [stderr] 83 | struct FnPointerRouter {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new` and `add_route` are never used
[INFO] [stderr]   --> crates/my_rust/src/ch14/callbacks.rs:89:8
[INFO] [stderr]    |
[INFO] [stderr] 87 | impl FnPointerRouter {
[INFO] [stderr]    | -------------------- associated items in this implementation
[INFO] [stderr] 88 |     // Create an empty router.
[INFO] [stderr] 89 |     fn new() -> FnPointerRouter {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 92 |     fn add_route(&mut self, url: &str, callback: fn(&Request) -> Response) {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias `BoxedCallback` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch14/callbacks.rs:35:10
[INFO] [stderr]    |
[INFO] [stderr] 35 |     type BoxedCallback = Box<dyn Fn(&Request) -> Response>;
[INFO] [stderr]    |          ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `BasicRouter` is never constructed
[INFO] [stderr]   --> crates/my_rust/src/ch14/callbacks.rs:37:12
[INFO] [stderr]    |
[INFO] [stderr] 37 |     struct BasicRouter {
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new` and `add_route` are never used
[INFO] [stderr]   --> crates/my_rust/src/ch14/callbacks.rs:43:12
[INFO] [stderr]    |
[INFO] [stderr] 41 |     impl BasicRouter {
[INFO] [stderr]    |     ---------------- associated items in this implementation
[INFO] [stderr] 42 |         // Create an empty router.
[INFO] [stderr] 43 |         fn new() -> BasicRouter {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 50 |         fn add_route<C>(&mut self, url: &str, callback: C) where C: Fn(&Request) -> Response + 'static
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `handle_request` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch14/callbacks.rs:57:12
[INFO] [stderr]    |
[INFO] [stderr] 56 |     impl BasicRouter {
[INFO] [stderr]    |     ---------------- method in this implementation
[INFO] [stderr] 57 |         fn handle_request(&self, request: &Request) -> Response {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `triangle` is never used
[INFO] [stderr]  --> crates/my_rust/src/ch15/mod.rs:7:4
[INFO] [stderr]   |
[INFO] [stderr] 7 | fn triangle(n: i32) -> i32 {
[INFO] [stderr]   |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `escape_time` is never used
[INFO] [stderr]   --> crates/my_rust/src/ch15/mod.rs:99:8
[INFO] [stderr]    |
[INFO] [stderr] 99 |     fn escape_time(c: Complex<f64>, limit: usize) -> Option<usize> {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `try_fold` is never used
[INFO] [stderr]    --> crates/my_rust/src/ch15/mod.rs:677:4
[INFO] [stderr]     |
[INFO] [stderr] 677 | fn try_fold() {
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `main` is never used
[INFO] [stderr]    --> crates/my_rust/src/ch15/mod.rs:551:8
[INFO] [stderr]     |
[INFO] [stderr] 551 |     fn main() {
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_last` is never used
[INFO] [stderr]    --> crates/my_rust/src/ch15/mod.rs:658:8
[INFO] [stderr]     |
[INFO] [stderr] 658 |     fn test_last() {
[INFO] [stderr]     |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> crates/my_rust/src/ch1/actix_gcd.rs:34:9
[INFO] [stderr]    |
[INFO] [stderr] 34 |         main().await;
[INFO] [stderr]    |         ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 34 |         let _ = main().await;
[INFO] [stderr]    |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> crates/hi_rbatis/src/main.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     /// enable log crate to show sql logs
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 33 |     fast_log::init(fast_log::Config::new().console()).expect("rbatis init fail");
[INFO] [stderr]    |     ---------------------------------------------------------------------------- rustdoc does not generate documentation for expressions
[INFO] [stderr]    |
[INFO] [stderr]    = help: use `//` for a plain comment
[INFO] [stderr]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> crates/hi_rbatis/src/main.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     /// initialize rbatis. also you can call rb.clone(). this is  an Arc point
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 35 |     let rb = RBatis::new();
[INFO] [stderr]    |     ----------------------- rustdoc does not generate documentation for statements
[INFO] [stderr]    |
[INFO] [stderr]    = help: use `//` for a plain comment
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> crates/hi_rbatis/src/main.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     /// connect to database 
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 51 |     rb.link(SqliteDriver {}, "sqlite://../target/sqlite.db").await.unwrap();
[INFO] [stderr]    |     ----------------------------------------------------------------------- rustdoc does not generate documentation for expressions
[INFO] [stderr]    |
[INFO] [stderr]    = help: use `//` for a plain comment
[INFO] [stderr] 
[INFO] [stderr] warning: `my_rust` (bin "my_rust" test) generated 167 warnings (run `cargo fix --bin "my_rust" --tests` to apply 53 suggestions)
[INFO] [stderr] warning: `hi_rbatis` (bin "hi_rbatis" test) generated 3 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.24s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/hi_rbatis-8cc7599a56dd7efc)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/my_rust-bcef8d6dda20ee0d)
[INFO] [stdout] 
[INFO] [stdout] running 145 tests
[INFO] [stdout] test ch10::enum_with_data::test_size_of_json ... ok
[INFO] [stdout] test ch10::generic_enums::test_build ... ok
[INFO] [stdout] test ch10::enum_with_data::struct_variants ... ok
[INFO] [stdout] test ch10::c_style_enum ... ok
[INFO] [stdout] test ch10::enum_with_data::test_new ... ok
[INFO] [stdout] test ch10::matches::match_tuples ... ok
[INFO] [stdout] test ch10::matches::test_catchall ... ok
[INFO] [stdout] test ch10::matches::test_switch_int ... ok
[INFO] [stdout] test ch11::associated_constants::test_dot ... ok
[INFO] [stdout] test ch11::impl_traits::impl_trait ... ok
[INFO] [stdout] test ch12::index_traits::index_mut ... ok
[INFO] [stdout] test ch11::test_say_hello ... FAILED
[INFO] [stdout] test ch11::trait_objects::it_works ... ok
[INFO] [stdout] test ch12::index_traits::it_works ... ok
[INFO] [stdout] test ch12::ops_overloading::test_add ... ok
[INFO] [stdout] test ch12::ops_overloading::test_equivalence_relation ... ok
[INFO] [stdout] test ch11::fully_qualified_method_call::it_works ... ok
[INFO] [stdout] test ch12::ops_overloading::test_partial_ord ... ok
[INFO] [stdout] test ch13::defaults::it_works ... ok
[INFO] [stdout] test ch13::deref_coercions::test_deref ... ok
[INFO] [stdout] test ch13::drops::test_drop ... ok
[INFO] [stdout] test ch14::callbacks::test_fn_ptr ... ok
[INFO] [stdout] test ch14::closures::fn_type ... ok
[INFO] [stdout] test ch14::closures::test_call_twice ... ok
[INFO] [stdout] test ch14::closures::test_call_twice2 ... ok
[INFO] [stdout] test ch14::closures::test_copy_clone ... ok
[INFO] [stdout] test ch14::closures::test_count_selected_cities ... ok
[INFO] [stdout] test ch14::closures::test_count_selected_cities2 ... ok
[INFO] [stdout] test ch15::adapters::test_filter ... ok
[INFO] [stdout] test ch15::adapters::test_map ... ok
[INFO] [stdout] test ch15::bin_heaps::test_ops ... ok
[INFO] [stdout] test ch15::build_collections::it_works ... ok
[INFO] [stdout] test ch15::build_collections::test_extend ... ok
[INFO] [stdout] test ch15::build_collections::test_for_each ... ok
[INFO] [stdout] test ch15::consuming::it_works ... ok
[INFO] [stdout] test ch15::consuming::test_any_all ... ok
[INFO] [stdout] test ch15::consuming::test_nth_back ... ok
[INFO] [stdout] test ch15::iter_in_std::iter_sources ... ok
[INFO] [stdout] test ch15::consuming::test_find_xxx ... ok
[INFO] [stdout] test ch15::consuming::test_pos ... ok
[INFO] [stdout] test ch14::closures::test_move_closure ... ok
[INFO] [stdout] test ch15::build_collections::test_partition ... ok
[INFO] [stdout] test ch15::iter_in_std::iter_sources2 ... ok
[INFO] [stdout] test ch15::consuming::test_fold ... ok
[INFO] [stdout] test ch15::into_iter ... ok
[INFO] [stdout] test ch15::iter_in_std::iter_sources_string_str ... ok
[INFO] [stdout] test ch15::iter_mut ... ok
[INFO] [stdout] test ch15::iter_over_vec ... ok
[INFO] [stdout] test ch15::manually_iter ... ok
[INFO] [stdout] test ch15::own_iter::it_works ... ok
[INFO] [stdout] test ch15::iter_in_std::iter_sources_collections ... ok
[INFO] [stdout] test ch15::popular_adapters::test_cycle ... ok
[INFO] [stdout] test ch15::own_iter::test_tree_iter ... ok
[INFO] [stdout] test ch15::popular_adapters::test_filter ... ok
[INFO] [stdout] test ch15::popular_adapters::test_cloned ... ok
[INFO] [stdout] test ch15::popular_adapters::test_chain ... ok
[INFO] [stdout] test ch15::iter_in_std::iter_sources3 ... ok
[INFO] [stdout] test ch15::popular_adapters::test_by_ref ... ok
[INFO] [stdout] test ch15::popular_adapters::test_filter_map ... ok
[INFO] [stdout] test ch15::popular_adapters::test_fuse ... ok
[INFO] [stdout] test ch15::popular_adapters::test_enumerate ... ok
[INFO] [stdout] test ch15::popular_adapters::test_flat_map ... ok
[INFO] [stdout] test ch15::popular_adapters::test_flatten ... ok
[INFO] [stdout] test ch15::popular_adapters::test_rev ... ok
[INFO] [stdout] test ch15::popular_adapters::test_map ... ok
[INFO] [stdout] test ch15::popular_adapters::test_skip_while ... ok
[INFO] [stdout] test ch15::popular_adapters::test_peekable ... ok
[INFO] [stdout] test ch15::popular_adapters::test_take_while ... ok
[INFO] [stdout] test ch15::popular_adapters::test_zip ... ok
[INFO] [stdout] test ch15::sets::it_works ... ok
[INFO] [stdout] test ch15::test_capture_env ... ok
[INFO] [stdout] test ch15::test_drain ... ok
[INFO] [stdout] test ch15::popular_adapters::test_inspect ... ok
[INFO] [stdout] test ch16::vecs::compare_slices::test_random ... ok
[INFO] [stdout] test ch16::vecs::invalidation_error ... ok
[INFO] [stdout] test ch16::vecs::compare_slices::test_eq ... ok
[INFO] [stdout] test ch16::deques::test_ops ... ok
[INFO] [stdout] test ch16::vecs::compare_slices::test_comparisons ... ok
[INFO] [stdout] test ch16::vecs::sorting_search::test_ordering ... ok
[INFO] [stdout] test ch15::test_successors ... ok
[INFO] [stdout] test ch16::vecs::sorting_search::test_searching ... ok
[INFO] [stdout] test ch16::vecs::swappings::test_swapping ... ok
[INFO] [stdout] test ch16::vecs::test_accessing ... ok
[INFO] [stdout] test ch16::vecs::test_create ... ok
[INFO] [stdout] test ch16::vecs::test_from_iter ... ok
[INFO] [stdout] test ch15::test_from_fn ... ok
[INFO] [stdout] test ch16::vecs::makes_copies ... ok
[INFO] [stdout] test ch16::vecs::test_join ... ok
[INFO] [stdout] test ch1::mandelbrot::test_pixel_to_point ... ok
[INFO] [stdout] test ch1::mandelbrot::test_parse_complex ... ok
[INFO] [stdout] test ch16::vecs::test_splitting ... ok
[INFO] [stdout] test ch16::vecs::test_growing_shrinking ... ok
[INFO] [stdout] test ch3::booleans::test_convertions ... ok
[INFO] [stdout] test ch3::characters::test_convert ... ok
[INFO] [stdout] test ch1::handling_command_line_arguments::test_gcd ... ok
[INFO] [stdout] test ch1::mandelbrot::test_parse_pair ... ok
[INFO] [stdout] test ch2::test ... ok
[INFO] [stdout] test ch3::characters::test_convert2 ... ok
[INFO] [stdout] test ch3::booleans::test_size ... ok
[INFO] [stdout] test ch3::floating_point_types::test_constants ... ok
[INFO] [stdout] test ch3::overflowing_operations ... ok
[INFO] [stdout] test ch3::checked_ops ... ok
[INFO] [stdout] test ch3::saturating_operations ... ok
[INFO] [stdout] test ch3::sequence_values::test_slice ... ok
[INFO] [stdout] test ch3::sequence_values::test_vector ... ok
[INFO] [stdout] test ch3::sequence_values::test_array ... ok
[INFO] [stdout] test ch3::strings::byte_string ... ok
[INFO] [stdout] test ch3::strings::strings ... ok
[INFO] [stdout] test ch3::characters::test_size ... ok
[INFO] [stdout] test ch3::floating_point_types::test_mathematical_calculations ... ok
[INFO] [stdout] test ch3::wrapping_operations ... ok
[INFO] [stdout] test ch3::test_conversions ... ok
[INFO] [stdout] test ch3::tuples::comma_at_end ... ok
[INFO] [stdout] test ch4::ownership::consume_elements ... ok
[INFO] [stdout] test ch3::tuples::test_zero_tuple ... ok
[INFO] [stdout] test ch4::ownership::another_move_from_vector ... ok
[INFO] [stdout] test ch3::tuples::test_split_at ... ok
[INFO] [stdout] test ch4::ownership::copy_types ... ok
[INFO] [stdout] test ch4::ownership::test_move_from_vector ... ok
[INFO] [stdout] test ch5::lifetimes::test_app ... ok
[INFO] [stdout] test ch5::lifetimes::test_returning_ref ... ok
[INFO] [stdout] test ch4::ownership::udt_copy ... ok
[INFO] [stdout] test ch5::lifetimes::omitting_lifetime_params ... ok
[INFO] [stdout] test ch5::lifetimes::refs_in_struct ... ok
[INFO] [stdout] test ch5::lifetimes::test_f ... ok
[INFO] [stdout] test ch5::refs_values::comparison ... ok
[INFO] [stdout] test ch5::refs_values::assigning_reference ... ok
[INFO] [stdout] test ch4::shared_ownership::_1 ... ok
[INFO] [stdout] test ch7::test_main ... ok
[INFO] [stdout] test ch5::lifetimes::sharing_vs_mutation ... ok
[INFO] [stdout] test ch5::refs_values::implicitly_dereferences ... ok
[INFO] [stdout] test ch5::refs_values::main ... ok
[INFO] [stdout] test ch5::refs_values::deref ... ok
[INFO] [stdout] test ch8::main ... ok
[INFO] [stdout] test ch9::generic_structs::test_new ... ok
[INFO] [stdout] test ch9::impls::test_queue_is_empty ... ok
[INFO] [stdout] test ch9::impls::test_queue_works ... ok
[INFO] [stdout] test ch8::trig_works ... ok
[INFO] [stdout] test ch9::main ... ok
[INFO] [stdout] test ch9::init_works ... ok
[INFO] [stdout] test ch9::test_create_broom ... ok
[INFO] [stdout] test ch9::impls::test_split ... ok
[INFO] [stdout] test ch9::tuple_like_structs::test_construct ... ok
[INFO] [stdout] test ch9::struct_with_lifetimes::test_find_extrema ... ok
[INFO] [stdout] test ch15::consuming::test_compare ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- ch11::test_say_hello stdout ----
[INFO] [stdout] Error: Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" }
[INFO] [stdout] 
[INFO] [stdout] ---- ch15::consuming::test_compare stdout ----
[INFO] [stdout] thread 'ch15::consuming::test_compare' panicked at crates/my_rust/src/ch15/mod.rs:602:9:
[INFO] [stdout] assertion failed: spaced < obscure
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5626d3ec2d96 - std::backtrace_rs::backtrace::libunwind::trace::hbee8a7973eeb6c93
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
[INFO] [stdout]    1:     0x5626d3ec2d96 - std::backtrace_rs::backtrace::trace_unsynchronized::hc8ac75eea3aa6899
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x5626d3ec2d96 - std::sys_common::backtrace::_print_fmt::hc7f3e3b5298b1083
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stdout]    3:     0x5626d3ec2d96 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hbb235daedd7c6190
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x5626d3eee2e0 - core::fmt::rt::Argument::fmt::h76c38a80d925a410
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/fmt/rt.rs:142:9
[INFO] [stdout]    5:     0x5626d3eee2e0 - core::fmt::write::h3ed6aeaa977c8e45
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/fmt/mod.rs:1120:17
[INFO] [stdout]    6:     0x5626d3ec07cf - std::io::Write::write_fmt::h1299aa7741865f2b
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/io/mod.rs:1810:15
[INFO] [stdout]    7:     0x5626d3ec2b74 - std::sys_common::backtrace::_print::h5d645a07e0fcfdbb
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    8:     0x5626d3ec2b74 - std::sys_common::backtrace::print::h85035a511aafe7a8
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    9:     0x5626d3ec48e7 - std::panicking::default_hook::{{closure}}::hcce8cea212785a25
[INFO] [stdout]   10:     0x5626d3ec45cd - std::panicking::default_hook::hf5fcb0f213fe709a
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:289:9
[INFO] [stdout]   11:     0x5626d3e18ee7 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h60265c2dfa87ee34
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/alloc/src/boxed.rs:2029:9
[INFO] [stdout]   12:     0x5626d3e18ee7 - test::test_main::{{closure}}::h77865bd3127078c6
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/test/src/lib.rs:138:21
[INFO] [stdout]   13:     0x5626d3ec4f06 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hbc5ccf4eb663e1e5
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/alloc/src/boxed.rs:2029:9
[INFO] [stdout]   14:     0x5626d3ec4f06 - std::panicking::rust_panic_with_hook::h095fccf1dc9379ee
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:783:13
[INFO] [stdout]   15:     0x5626d3ec4c19 - std::panicking::begin_panic_handler::{{closure}}::h032ba12139b353db
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:649:13
[INFO] [stdout]   16:     0x5626d3ec3296 - std::sys_common::backtrace::__rust_end_short_backtrace::h9259bc2ff8fd0f76
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys_common/backtrace.rs:171:18
[INFO] [stdout]   17:     0x5626d3ec49b0 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:645:5
[INFO] [stdout]   18:     0x5626d3d39235 - core::panicking::panic_fmt::h784f20a50eaab275
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/panicking.rs:72:14
[INFO] [stdout]   19:     0x5626d3d392f3 - core::panicking::panic::hb837a5ebbbe5b188
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/panicking.rs:144:5
[INFO] [stdout]   20:     0x5626d3de322f - my_rust::ch15::consuming::test_compare::h228d56d5962f169e
[INFO] [stdout]                                at /opt/rustwide/workdir/crates/my_rust/src/ch15/mod.rs:602:9
[INFO] [stdout]   21:     0x5626d3de3117 - my_rust::ch15::consuming::test_compare::{{closure}}::hda0c81766bba347f
[INFO] [stdout]                                at /opt/rustwide/workdir/crates/my_rust/src/ch15/mod.rs:595:22
[INFO] [stdout]   22:     0x5626d3dda786 - core::ops::function::FnOnce::call_once::ha58081d1d0c45014
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x5626d3e1e7bf - core::ops::function::FnOnce::call_once::h8dc6907944022cf6
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x5626d3e1e7bf - test::__rust_begin_short_backtrace::haae1a87433f1efb3
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/test/src/lib.rs:627:18
[INFO] [stdout]   25:     0x5626d3e1d541 - test::run_test_in_process::{{closure}}::h8c7decfa7c14e152
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/test/src/lib.rs:650:60
[INFO] [stdout]   26:     0x5626d3e1d541 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h19e6ff056d9d21e9
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   27:     0x5626d3e1d541 - std::panicking::try::do_call::h89c848fcaa37c035
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:552:40
[INFO] [stdout]   28:     0x5626d3e1d541 - std::panicking::try::h57ab3dc74e2839b8
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:516:19
[INFO] [stdout]   29:     0x5626d3e1d541 - std::panic::catch_unwind::hfb6a1b1abc120fb9
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panic.rs:142:14
[INFO] [stdout]   30:     0x5626d3e1d541 - test::run_test_in_process::h5ae2f9875edd562d
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/test/src/lib.rs:650:27
[INFO] [stdout]   31:     0x5626d3e1d541 - test::run_test::{{closure}}::h35d7300d8928a067
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/test/src/lib.rs:573:43
[INFO] [stdout]   32:     0x5626d3de4876 - test::run_test::{{closure}}::h7525ced405d23d1b
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/test/src/lib.rs:601:41
[INFO] [stdout]   33:     0x5626d3de4876 - std::sys_common::backtrace::__rust_begin_short_backtrace::h4e7db78ce05afad8
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys_common/backtrace.rs:155:18
[INFO] [stdout]   34:     0x5626d3de98d7 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hcfbcb64f1a1b3482
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/thread/mod.rs:529:17
[INFO] [stdout]   35:     0x5626d3de98d7 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h9d89c5c4108bd689
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   36:     0x5626d3de98d7 - std::panicking::try::do_call::h8a4869bc94ec50c9
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:552:40
[INFO] [stdout]   37:     0x5626d3de98d7 - std::panicking::try::h9a576f20ff81ac30
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:516:19
[INFO] [stdout]   38:     0x5626d3de98d7 - std::panic::catch_unwind::hbcb4e3f860ef9830
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panic.rs:142:14
[INFO] [stdout]   39:     0x5626d3de98d7 - std::thread::Builder::spawn_unchecked_::{{closure}}::h93c79a6be1505948
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/thread/mod.rs:528:30
[INFO] [stdout]   40:     0x5626d3de98d7 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h426d96740c81bdaf
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   41:     0x5626d3ec99b5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h12de4fc57affb195
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/alloc/src/boxed.rs:2015:9
[INFO] [stdout]   42:     0x5626d3ec99b5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h3c619f45059d5cf1
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/alloc/src/boxed.rs:2015:9
[INFO] [stdout]   43:     0x5626d3ec99b5 - std::sys::unix::thread::Thread::new::thread_start::hbac657605e4b7389
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys/unix/thread.rs:108:17
[INFO] [stdout]   44:     0x7f56ce7ffac3 - <unknown>
[INFO] [stdout]   45:     0x7f56ce890bf4 - __clone
[INFO] [stdout]   46:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     ch11::test_say_hello
[INFO] [stdout]     ch15::consuming::test_compare
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 143 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.27s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `-p my_rust --bin my_rust`
[INFO] running `Command { std: "docker" "inspect" "c78cec697117112f9a18b8930161f019ba64f0e65222db72e19e5bed6c250eb0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c78cec697117112f9a18b8930161f019ba64f0e65222db72e19e5bed6c250eb0", kill_on_drop: false }`
[INFO] [stdout] c78cec697117112f9a18b8930161f019ba64f0e65222db72e19e5bed6c250eb0
