[INFO] fetching crate blue_sky 0.1.1...
[INFO] checking blue_sky-0.1.1 against master#350d0ef0ec0493e6d21cfb265cb8211a0e74d766 for pr-145342-1
[INFO] extracting crate blue_sky 0.1.1 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate blue_sky 0.1.1
[INFO] finished tweaking crates.io crate blue_sky 0.1.1
[INFO] tweaked toml for crates.io crate blue_sky 0.1.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate blue_sky 0.1.1 on toolchain 350d0ef0ec0493e6d21cfb265cb8211a0e74d766
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate blue_sky 0.1.1 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" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f91c7a6e3cf79f9aea432af7956ff0e74d37534188ff6f1428e8da8bcbbbe26d
[INFO] running `Command { std: "docker" "start" "-a" "f91c7a6e3cf79f9aea432af7956ff0e74d37534188ff6f1428e8da8bcbbbe26d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f91c7a6e3cf79f9aea432af7956ff0e74d37534188ff6f1428e8da8bcbbbe26d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f91c7a6e3cf79f9aea432af7956ff0e74d37534188ff6f1428e8da8bcbbbe26d", kill_on_drop: false }`
[INFO] [stdout] f91c7a6e3cf79f9aea432af7956ff0e74d37534188ff6f1428e8da8bcbbbe26d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 38b96fdd203878bbc1272fe9d018f3581105d5f86ea8a1a8e5663f5be52078fc
[INFO] running `Command { std: "docker" "start" "-a" "38b96fdd203878bbc1272fe9d018f3581105d5f86ea8a1a8e5663f5be52078fc", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.89
[INFO] [stderr]    Compiling unicode-ident v1.0.13
[INFO] [stderr]    Compiling libc v0.2.161
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.87
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]     Checking zerocopy v0.7.35
[INFO] [stderr]     Checking ppv-lite86 v0.2.20
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking blue_sky v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::fmt::Result`
[INFO] [stdout]  --> src/lib.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::fmt::Result;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Result as IoResult`
[INFO] [stdout]   --> src/lib.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::io::Result as IoResult;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `cmp::Ordering` and `io`
[INFO] [stdout]   --> src/lib.rs:17:11
[INFO] [stdout]    |
[INFO] [stdout] 17 | use std::{cmp::Ordering, fs, io};
[INFO] [stdout]    |           ^^^^^^^^^^^^^      ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::*`
[INFO] [stdout]   --> src/lib.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | use std::collections::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/lib.rs:84:9
[INFO] [stdout]    |
[INFO] [stdout] 84 |         ;
[INFO] [stdout]    |         ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `order1`
[INFO] [stdout]   --> src/front_of_house.rs:58:13
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let order1 = back_of_house::Appetizer::Salad;
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_order1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `order2`
[INFO] [stdout]   --> src/front_of_house.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let order2 = back_of_house::Appetizer::Soup;
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_order2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `string`
[INFO] [stdout]  --> src/persist/jdbc_operation.rs:4:18
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn jdbc_save(string: &str){
[INFO] [stdout]   |                  ^^^^^^ help: if this is intentional, prefix it with an underscore: `_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]  --> src/persist/redis_operation.rs:1:19
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn redis_save(key: &str, value: &str) {}
[INFO] [stdout]   |                   ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]  --> src/persist/redis_operation.rs:1:30
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn redis_save(key: &str, value: &str) {}
[INFO] [stdout]   |                              ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `string`
[INFO] [stdout]  --> src/persist/redis_operation.rs:3:21
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn redis_delete(string: &str){
[INFO] [stdout]   |                     ^^^^^^ help: if this is intentional, prefix it with an underscore: `_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/lib.rs:62:13
[INFO] [stdout]    |
[INFO] [stdout] 62 |         Err(e) => {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `seat_at_table` is never used
[INFO] [stdout]   --> src/front_of_house.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn seat_at_table() {}
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_order` is never used
[INFO] [stdout]   --> src/front_of_house.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn take_order() {}
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `serve_order` is never used
[INFO] [stdout]   --> src/front_of_house.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn serve_order() {}
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_payment` is never used
[INFO] [stdout]   --> src/front_of_house.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn take_payment() {}
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `eat_at_restaurant` is never used
[INFO] [stdout]   --> src/front_of_house.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 |     pub fn eat_at_restaurant() {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Breakfast` is never constructed
[INFO] [stdout]   --> src/front_of_house.rs:26:20
[INFO] [stdout]    |
[INFO] [stdout] 26 |         pub struct Breakfast {
[INFO] [stdout]    |                    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Appetizer` is never used
[INFO] [stdout]   --> src/front_of_house.rs:33:18
[INFO] [stdout]    |
[INFO] [stdout] 33 |         pub enum Appetizer {
[INFO] [stdout]    |                  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `summer` is never used
[INFO] [stdout]   --> src/front_of_house.rs:38:20
[INFO] [stdout]    |
[INFO] [stdout] 37 |         impl Breakfast {
[INFO] [stdout]    |         -------------- associated function in this implementation
[INFO] [stdout] 38 |             pub fn summer(toast: &str) -> Breakfast {
[INFO] [stdout]    |                    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fix_incorrect_order` is never used
[INFO] [stdout]   --> src/front_of_house.rs:45:12
[INFO] [stdout]    |
[INFO] [stdout] 45 |         fn fix_incorrect_order() {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `cook_order` is never used
[INFO] [stdout]   --> src/front_of_house.rs:50:12
[INFO] [stdout]    |
[INFO] [stdout] 50 |         fn cook_order() {}
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `save` is never used
[INFO] [stdout]  --> src/persist/common_operation.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn save(){
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `aaaa` is never used
[INFO] [stdout]  --> src/aa.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn aaaa(){
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::Result`
[INFO] [stdout]  --> src/lib.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::fmt::Result;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Result as IoResult`
[INFO] [stdout]   --> src/lib.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::io::Result as IoResult;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `cmp::Ordering` and `io`
[INFO] [stdout]   --> src/lib.rs:17:11
[INFO] [stdout]    |
[INFO] [stdout] 17 | use std::{cmp::Ordering, fs, io};
[INFO] [stdout]    |           ^^^^^^^^^^^^^      ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::*`
[INFO] [stdout]   --> src/lib.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | use std::collections::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/lib.rs:84:9
[INFO] [stdout]    |
[INFO] [stdout] 84 |         ;
[INFO] [stdout]    |         ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `order1`
[INFO] [stdout]   --> src/front_of_house.rs:58:13
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let order1 = back_of_house::Appetizer::Salad;
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_order1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `order2`
[INFO] [stdout]   --> src/front_of_house.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let order2 = back_of_house::Appetizer::Soup;
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_order2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `string`
[INFO] [stdout]  --> src/persist/jdbc_operation.rs:4:18
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn jdbc_save(string: &str){
[INFO] [stdout]   |                  ^^^^^^ help: if this is intentional, prefix it with an underscore: `_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]  --> src/persist/redis_operation.rs:1:19
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn redis_save(key: &str, value: &str) {}
[INFO] [stdout]   |                   ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]  --> src/persist/redis_operation.rs:1:30
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn redis_save(key: &str, value: &str) {}
[INFO] [stdout]   |                              ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `string`
[INFO] [stdout]  --> src/persist/redis_operation.rs:3:21
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn redis_delete(string: &str){
[INFO] [stdout]   |                     ^^^^^^ help: if this is intentional, prefix it with an underscore: `_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/lib.rs:62:13
[INFO] [stdout]    |
[INFO] [stdout] 62 |         Err(e) => {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `seat_at_table` is never used
[INFO] [stdout]   --> src/front_of_house.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn seat_at_table() {}
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_order` is never used
[INFO] [stdout]   --> src/front_of_house.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn take_order() {}
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `serve_order` is never used
[INFO] [stdout]   --> src/front_of_house.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn serve_order() {}
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_payment` is never used
[INFO] [stdout]   --> src/front_of_house.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn take_payment() {}
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `eat_at_restaurant` is never used
[INFO] [stdout]   --> src/front_of_house.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 |     pub fn eat_at_restaurant() {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Breakfast` is never constructed
[INFO] [stdout]   --> src/front_of_house.rs:26:20
[INFO] [stdout]    |
[INFO] [stdout] 26 |         pub struct Breakfast {
[INFO] [stdout]    |                    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Appetizer` is never used
[INFO] [stdout]   --> src/front_of_house.rs:33:18
[INFO] [stdout]    |
[INFO] [stdout] 33 |         pub enum Appetizer {
[INFO] [stdout]    |                  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `summer` is never used
[INFO] [stdout]   --> src/front_of_house.rs:38:20
[INFO] [stdout]    |
[INFO] [stdout] 37 |         impl Breakfast {
[INFO] [stdout]    |         -------------- associated function in this implementation
[INFO] [stdout] 38 |             pub fn summer(toast: &str) -> Breakfast {
[INFO] [stdout]    |                    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fix_incorrect_order` is never used
[INFO] [stdout]   --> src/front_of_house.rs:45:12
[INFO] [stdout]    |
[INFO] [stdout] 45 |         fn fix_incorrect_order() {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `cook_order` is never used
[INFO] [stdout]   --> src/front_of_house.rs:50:12
[INFO] [stdout]    |
[INFO] [stdout] 50 |         fn cook_order() {}
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `save` is never used
[INFO] [stdout]  --> src/persist/common_operation.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn save(){
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `aaaa` is never used
[INFO] [stdout]  --> src/aa.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn aaaa(){
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `format`
[INFO] [stdout]  --> src/main.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::fmt::{format, Debug, Display};
[INFO] [stdout]   |                ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `fs`
[INFO] [stdout]  --> src/main.rs:6:16
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::{env, fs, io, process, thread};
[INFO] [stdout]   |                ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::error::Error`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::error::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::pin::pin`
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::pin::pin;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str::Matches`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::str::Matches;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `search`
[INFO] [stdout]   --> src/main.rs:13:21
[INFO] [stdout]    |
[INFO] [stdout] 13 | use blue_sky::{run, search, Config};
[INFO] [stdout]    |                     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `format`
[INFO] [stdout]  --> src/main.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::fmt::{format, Debug, Display};
[INFO] [stdout]   |                ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `fs`
[INFO] [stdout]  --> src/main.rs:6:16
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::{env, fs, io, process, thread};
[INFO] [stdout]   |                ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::error::Error`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::error::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::pin::pin`
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::pin::pin;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str::Matches`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::str::Matches;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `search`
[INFO] [stdout]   --> src/main.rs:13:21
[INFO] [stdout]    |
[INFO] [stdout] 13 | use blue_sky::{run, search, Config};
[INFO] [stdout]    |                     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `case_sensitive`
[INFO] [stdout]    --> src/main.rs:129:9
[INFO] [stdout]     |
[INFO] [stdout] 129 |     let case_sensitive = env::var("CASE_INSENSITIVE").is_err();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_case_sensitive`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]    --> src/main.rs:169:9
[INFO] [stdout]     |
[INFO] [stdout] 169 |     let s: &'static str = "I have a static lifetime.";
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main.rs:177:9
[INFO] [stdout]     |
[INFO] [stdout] 177 |     let i = ImportantExcerpt { part: first_sentence };
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/main.rs:207:30
[INFO] [stdout]     |
[INFO] [stdout] 207 | fn longest_1<'a>(x: &'a str, y: &str) -> &'a str {
[INFO] [stdout]     |                              ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/main.rs:216:17
[INFO] [stdout]     |
[INFO] [stdout] 216 |             let x = 5;        // -+-- 'b  |
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]    --> src/main.rs:235:56
[INFO] [stdout]     |
[INFO] [stdout] 235 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {
[INFO] [stdout]     |                                                        ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]    --> src/main.rs:235:62
[INFO] [stdout]     |
[INFO] [stdout] 235 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {
[INFO] [stdout]     |                                                              ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]    --> src/main.rs:239:31
[INFO] [stdout]     |
[INFO] [stdout] 239 | fn some_function_simple<T, U>(t: T, u: U) -> i32
[INFO] [stdout]     |                               ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]    --> src/main.rs:239:37
[INFO] [stdout]     |
[INFO] [stdout] 239 | fn some_function_simple<T, U>(t: T, u: U) -> i32
[INFO] [stdout]     |                                     ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `case_sensitive`
[INFO] [stdout]    --> src/main.rs:129:9
[INFO] [stdout]     |
[INFO] [stdout] 129 |     let case_sensitive = env::var("CASE_INSENSITIVE").is_err();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_case_sensitive`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]    --> src/main.rs:169:9
[INFO] [stdout]     |
[INFO] [stdout] 169 |     let s: &'static str = "I have a static lifetime.";
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main.rs:177:9
[INFO] [stdout]     |
[INFO] [stdout] 177 |     let i = ImportantExcerpt { part: first_sentence };
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/main.rs:207:30
[INFO] [stdout]     |
[INFO] [stdout] 207 | fn longest_1<'a>(x: &'a str, y: &str) -> &'a str {
[INFO] [stdout]     |                              ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/main.rs:216:17
[INFO] [stdout]     |
[INFO] [stdout] 216 |             let x = 5;        // -+-- 'b  |
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]    --> src/main.rs:235:56
[INFO] [stdout]     |
[INFO] [stdout] 235 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {
[INFO] [stdout]     |                                                        ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]    --> src/main.rs:235:62
[INFO] [stdout]     |
[INFO] [stdout] 235 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {
[INFO] [stdout]     |                                                              ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]    --> src/main.rs:239:31
[INFO] [stdout]     |
[INFO] [stdout] 239 | fn some_function_simple<T, U>(t: T, u: U) -> i32
[INFO] [stdout]     |                               ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]    --> src/main.rs:239:37
[INFO] [stdout]     |
[INFO] [stdout] 239 | fn some_function_simple<T, U>(t: T, u: U) -> i32
[INFO] [stdout]     |                                     ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]    --> src/main.rs:320:9
[INFO] [stdout]     |
[INFO] [stdout] 320 |     let f = match f {
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `other_error`
[INFO] [stdout]    --> src/main.rs:327:13
[INFO] [stdout]     |
[INFO] [stdout] 327 |             other_error => panic!("open file failed!")
[INFO] [stdout]     |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_other_error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]    --> src/main.rs:320:9
[INFO] [stdout]     |
[INFO] [stdout] 320 |     let f = match f {
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `other_error`
[INFO] [stdout]    --> src/main.rs:327:13
[INFO] [stdout]     |
[INFO] [stdout] 327 |             other_error => panic!("open file failed!")
[INFO] [stdout]     |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_other_error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vec`
[INFO] [stdout]    --> src/main.rs:344:9
[INFO] [stdout]     |
[INFO] [stdout] 344 |     let vec: Vec<i32> = Vec::new();
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_vec`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `six`
[INFO] [stdout]    --> src/main.rs:389:9
[INFO] [stdout]     |
[INFO] [stdout] 389 |     let six = plus_one(five);
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_six`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vec`
[INFO] [stdout]    --> src/main.rs:344:9
[INFO] [stdout]     |
[INFO] [stdout] 344 |     let vec: Vec<i32> = Vec::new();
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_vec`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `none`
[INFO] [stdout]    --> src/main.rs:390:9
[INFO] [stdout]     |
[INFO] [stdout] 390 |     let none = plus_one(None);
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_none`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `some_number`
[INFO] [stdout]    --> src/main.rs:424:9
[INFO] [stdout]     |
[INFO] [stdout] 424 |     let some_number = Some(5);
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `some_string`
[INFO] [stdout]    --> src/main.rs:425:9
[INFO] [stdout]     |
[INFO] [stdout] 425 |     let some_string = Some("a string");
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `absent_number`
[INFO] [stdout]    --> src/main.rs:426:9
[INFO] [stdout]     |
[INFO] [stdout] 426 |     let absent_number: Option<i32> = None;
[INFO] [stdout]     |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_absent_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v4`
[INFO] [stdout]    --> src/main.rs:429:9
[INFO] [stdout]     |
[INFO] [stdout] 429 |     let v4 = IpAddrKind::V4(127, 0, 0, 1);
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_v4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `six`
[INFO] [stdout]    --> src/main.rs:389:9
[INFO] [stdout]     |
[INFO] [stdout] 389 |     let six = plus_one(five);
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_six`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `none`
[INFO] [stdout]    --> src/main.rs:390:9
[INFO] [stdout]     |
[INFO] [stdout] 390 |     let none = plus_one(None);
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_none`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `some_number`
[INFO] [stdout]    --> src/main.rs:424:9
[INFO] [stdout]     |
[INFO] [stdout] 424 |     let some_number = Some(5);
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `some_string`
[INFO] [stdout]    --> src/main.rs:425:9
[INFO] [stdout]     |
[INFO] [stdout] 425 |     let some_string = Some("a string");
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `absent_number`
[INFO] [stdout]    --> src/main.rs:426:9
[INFO] [stdout]     |
[INFO] [stdout] 426 |     let absent_number: Option<i32> = None;
[INFO] [stdout]     |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_absent_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v4`
[INFO] [stdout]    --> src/main.rs:429:9
[INFO] [stdout]     |
[INFO] [stdout] 429 |     let v4 = IpAddrKind::V4(127, 0, 0, 1);
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_v4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `color`
[INFO] [stdout]    --> src/main.rs:487:9
[INFO] [stdout]     |
[INFO] [stdout] 487 |     let color = Color(255, 255, 255);
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_color`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]    --> src/main.rs:518:9
[INFO] [stdout]     |
[INFO] [stdout] 518 |     let hello = &s[0..5];
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `color`
[INFO] [stdout]    --> src/main.rs:487:9
[INFO] [stdout]     |
[INFO] [stdout] 487 |     let color = Color(255, 255, 255);
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_color`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `world`
[INFO] [stdout]    --> src/main.rs:519:9
[INFO] [stdout]     |
[INFO] [stdout] 519 |     let world = &s[6..11];
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_world`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]    --> src/main.rs:518:9
[INFO] [stdout]     |
[INFO] [stdout] 518 |     let hello = &s[0..5];
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slice`
[INFO] [stdout]    --> src/main.rs:520:9
[INFO] [stdout]     |
[INFO] [stdout] 520 |     let slice = &s[3..];
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_slice`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `world`
[INFO] [stdout]    --> src/main.rs:519:9
[INFO] [stdout]     |
[INFO] [stdout] 519 |     let world = &s[6..11];
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_world`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slice`
[INFO] [stdout]    --> src/main.rs:521:9
[INFO] [stdout]     |
[INFO] [stdout] 521 |     let slice = &s[..3];
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_slice`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slice`
[INFO] [stdout]    --> src/main.rs:520:9
[INFO] [stdout]     |
[INFO] [stdout] 520 |     let slice = &s[3..];
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_slice`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slice`
[INFO] [stdout]    --> src/main.rs:522:9
[INFO] [stdout]     |
[INFO] [stdout] 522 |     let slice = &s[..];
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_slice`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slice`
[INFO] [stdout]    --> src/main.rs:521:9
[INFO] [stdout]     |
[INFO] [stdout] 521 |     let slice = &s[..3];
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_slice`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `k1`
[INFO] [stdout]    --> src/main.rs:568:9
[INFO] [stdout]     |
[INFO] [stdout] 568 |     let k1 = &mut k;
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_k1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slice`
[INFO] [stdout]    --> src/main.rs:522:9
[INFO] [stdout]     |
[INFO] [stdout] 522 |     let slice = &s[..];
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_slice`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `k1`
[INFO] [stdout]    --> src/main.rs:568:9
[INFO] [stdout]     |
[INFO] [stdout] 568 |     let k1 = &mut k;
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_k1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `condition`
[INFO] [stdout]    --> src/main.rs:692:9
[INFO] [stdout]     |
[INFO] [stdout] 692 |     let condition: i32 = if count == 12 {
[INFO] [stdout]     |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_condition`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/main.rs:707:9
[INFO] [stdout]     |
[INFO] [stdout] 707 |     let x = {
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i8`
[INFO] [stdout]    --> src/main.rs:722:9
[INFO] [stdout]     |
[INFO] [stdout] 722 |     let i8: i8 = 1;
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_i8`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u8`
[INFO] [stdout]    --> src/main.rs:724:9
[INFO] [stdout]     |
[INFO] [stdout] 724 |     let u8: u8 = 1;
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_u8`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i16`
[INFO] [stdout]    --> src/main.rs:726:9
[INFO] [stdout]     |
[INFO] [stdout] 726 |     let i16: i16 = 2;
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_i16`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u16`
[INFO] [stdout]    --> src/main.rs:728:9
[INFO] [stdout]     |
[INFO] [stdout] 728 |     let u16: u16 = 2;
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_u16`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i32`
[INFO] [stdout]    --> src/main.rs:730:9
[INFO] [stdout]     |
[INFO] [stdout] 730 |     let i32: i32 = 3;
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_i32`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u32`
[INFO] [stdout]    --> src/main.rs:732:9
[INFO] [stdout]     |
[INFO] [stdout] 732 |     let u32: u32 = 3;
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_u32`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i64`
[INFO] [stdout]    --> src/main.rs:734:9
[INFO] [stdout]     |
[INFO] [stdout] 734 |     let i64: i64 = 4;
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_i64`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u64`
[INFO] [stdout]    --> src/main.rs:736:9
[INFO] [stdout]     |
[INFO] [stdout] 736 |     let u64: u64 = 5;
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_u64`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `condition`
[INFO] [stdout]    --> src/main.rs:692:9
[INFO] [stdout]     |
[INFO] [stdout] 692 |     let condition: i32 = if count == 12 {
[INFO] [stdout]     |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_condition`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `byt`
[INFO] [stdout]    --> src/main.rs:739:9
[INFO] [stdout]     |
[INFO] [stdout] 739 |     let byt = b'A';
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_byt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f32`
[INFO] [stdout]    --> src/main.rs:742:9
[INFO] [stdout]     |
[INFO] [stdout] 742 |     let f32: f32 = 1.0;
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_f32`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f64`
[INFO] [stdout]    --> src/main.rs:743:9
[INFO] [stdout]     |
[INFO] [stdout] 743 |     let f64 = 2.0;
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_f64`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `flag`
[INFO] [stdout]    --> src/main.rs:746:9
[INFO] [stdout]     |
[INFO] [stdout] 746 |     let flag: bool = true;
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_flag`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ch`
[INFO] [stdout]    --> src/main.rs:749:9
[INFO] [stdout]     |
[INFO] [stdout] 749 |     let ch: char = 'A';
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_ch`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr`
[INFO] [stdout]    --> src/main.rs:758:9
[INFO] [stdout]     |
[INFO] [stdout] 758 |     let arr = [1, 2, 3, 4, 5];
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_arr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr_other`
[INFO] [stdout]    --> src/main.rs:759:9
[INFO] [stdout]     |
[INFO] [stdout] 759 |     let arr_other: [i32; 3] = [1, 2, 3];
[INFO] [stdout]     |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_arr_other`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr_zero`
[INFO] [stdout]    --> src/main.rs:760:9
[INFO] [stdout]     |
[INFO] [stdout] 760 |     let arr_zero = [0; 3];
[INFO] [stdout]     |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_arr_zero`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/main.rs:707:9
[INFO] [stdout]     |
[INFO] [stdout] 707 |     let x = {
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i8`
[INFO] [stdout]    --> src/main.rs:722:9
[INFO] [stdout]     |
[INFO] [stdout] 722 |     let i8: i8 = 1;
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_i8`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u8`
[INFO] [stdout]    --> src/main.rs:724:9
[INFO] [stdout]     |
[INFO] [stdout] 724 |     let u8: u8 = 1;
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_u8`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i16`
[INFO] [stdout]    --> src/main.rs:726:9
[INFO] [stdout]     |
[INFO] [stdout] 726 |     let i16: i16 = 2;
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_i16`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u16`
[INFO] [stdout]    --> src/main.rs:728:9
[INFO] [stdout]     |
[INFO] [stdout] 728 |     let u16: u16 = 2;
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_u16`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i32`
[INFO] [stdout]    --> src/main.rs:730:9
[INFO] [stdout]     |
[INFO] [stdout] 730 |     let i32: i32 = 3;
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_i32`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u32`
[INFO] [stdout]    --> src/main.rs:732:9
[INFO] [stdout]     |
[INFO] [stdout] 732 |     let u32: u32 = 3;
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_u32`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i64`
[INFO] [stdout]    --> src/main.rs:734:9
[INFO] [stdout]     |
[INFO] [stdout] 734 |     let i64: i64 = 4;
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_i64`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u64`
[INFO] [stdout]    --> src/main.rs:736:9
[INFO] [stdout]     |
[INFO] [stdout] 736 |     let u64: u64 = 5;
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_u64`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `byt`
[INFO] [stdout]    --> src/main.rs:739:9
[INFO] [stdout]     |
[INFO] [stdout] 739 |     let byt = b'A';
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_byt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f32`
[INFO] [stdout]    --> src/main.rs:742:9
[INFO] [stdout]     |
[INFO] [stdout] 742 |     let f32: f32 = 1.0;
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_f32`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f64`
[INFO] [stdout]    --> src/main.rs:743:9
[INFO] [stdout]     |
[INFO] [stdout] 743 |     let f64 = 2.0;
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_f64`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `flag`
[INFO] [stdout]    --> src/main.rs:746:9
[INFO] [stdout]     |
[INFO] [stdout] 746 |     let flag: bool = true;
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_flag`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ch`
[INFO] [stdout]    --> src/main.rs:749:9
[INFO] [stdout]     |
[INFO] [stdout] 749 |     let ch: char = 'A';
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_ch`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr`
[INFO] [stdout]    --> src/main.rs:758:9
[INFO] [stdout]     |
[INFO] [stdout] 758 |     let arr = [1, 2, 3, 4, 5];
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_arr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr_other`
[INFO] [stdout]    --> src/main.rs:759:9
[INFO] [stdout]     |
[INFO] [stdout] 759 |     let arr_other: [i32; 3] = [1, 2, 3];
[INFO] [stdout]     |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_arr_other`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr_zero`
[INFO] [stdout]    --> src/main.rs:760:9
[INFO] [stdout]     |
[INFO] [stdout] 760 |     let arr_zero = [0; 3];
[INFO] [stdout]     |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_arr_zero`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cacher` is never constructed
[INFO] [stdout]   --> src/main.rs:60:8
[INFO] [stdout]    |
[INFO] [stdout] 60 | struct Cacher<T>
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `value` are never used
[INFO] [stdout]   --> src/main.rs:72:8
[INFO] [stdout]    |
[INFO] [stdout] 67 | / impl<T> Cacher<T>
[INFO] [stdout] 68 | | where
[INFO] [stdout] 69 | |     T: Fn(u32) -> u32,
[INFO] [stdout]    | |______________________- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 72 |       fn new(calculation: T) -> Cacher<T> {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] ...
[INFO] [stdout] 76 |       fn value(&mut self, arg: u32) -> u32 {
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `excise_plan` is never used
[INFO] [stdout]   --> src/main.rs:87:4
[INFO] [stdout]    |
[INFO] [stdout] 87 | fn excise_plan() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `generate_workout` is never used
[INFO] [stdout]   --> src/main.rs:97:4
[INFO] [stdout]    |
[INFO] [stdout] 97 | fn generate_workout(intensity: u32, random_number: u32) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `mini_grep` is never used
[INFO] [stdout]    --> src/main.rs:127:4
[INFO] [stdout]     |
[INFO] [stdout] 127 | fn mini_grep() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest_with_an_announcement` is never used
[INFO] [stdout]    --> src/main.rs:156:4
[INFO] [stdout]     |
[INFO] [stdout] 156 | fn longest_with_an_announcement<'a, T>(x: &'a str, y: &'a str, ann: T) -> &'a str
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `static_lifecycle` is never used
[INFO] [stdout]    --> src/main.rs:168:4
[INFO] [stdout]     |
[INFO] [stdout] 168 | fn static_lifecycle() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_important_excerpt` is never used
[INFO] [stdout]    --> src/main.rs:172:4
[INFO] [stdout]     |
[INFO] [stdout] 172 | fn test_important_excerpt() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ImportantExcerpt` is never constructed
[INFO] [stdout]    --> src/main.rs:179:8
[INFO] [stdout]     |
[INFO] [stdout] 179 | struct ImportantExcerpt<'a> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest_test` is never used
[INFO] [stdout]    --> src/main.rs:184:4
[INFO] [stdout]     |
[INFO] [stdout] 184 | fn longest_test() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest` is never used
[INFO] [stdout]    --> src/main.rs:199:4
[INFO] [stdout]     |
[INFO] [stdout] 199 | fn longest<'a>(str1: &'a str, str2: &'a str) -> &'a str {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest_1` is never used
[INFO] [stdout]    --> src/main.rs:207:4
[INFO] [stdout]     |
[INFO] [stdout] 207 | fn longest_1<'a>(x: &'a str, y: &str) -> &'a str {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `lifecycle_null_ref` is never used
[INFO] [stdout]    --> src/main.rs:211:4
[INFO] [stdout]     |
[INFO] [stdout] 211 | fn lifecycle_null_ref() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `trait_test` is never used
[INFO] [stdout]    --> src/main.rs:224:4
[INFO] [stdout]     |
[INFO] [stdout] 224 | fn trait_test() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `returns_summarizable` is never used
[INFO] [stdout]    --> src/main.rs:231:4
[INFO] [stdout]     |
[INFO] [stdout] 231 | fn returns_summarizable() -> impl Summary {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `some_function` is never used
[INFO] [stdout]    --> src/main.rs:235:4
[INFO] [stdout]     |
[INFO] [stdout] 235 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `some_function_simple` is never used
[INFO] [stdout]    --> src/main.rs:239:4
[INFO] [stdout]     |
[INFO] [stdout] 239 | fn some_function_simple<T, U>(t: T, u: U) -> i32
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `trait_as_params_advanced` is never used
[INFO] [stdout]    --> src/main.rs:255:4
[INFO] [stdout]     |
[INFO] [stdout] 255 | fn trait_as_params_advanced(summary: &(impl Summary + SummaryAdvance)) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `trait_as_params` is never used
[INFO] [stdout]    --> src/main.rs:267:4
[INFO] [stdout]     |
[INFO] [stdout] 267 | fn trait_as_params(summary: &impl Summary) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PointPosition` is never constructed
[INFO] [stdout]    --> src/main.rs:288:8
[INFO] [stdout]     |
[INFO] [stdout] 288 | struct PointPosition<T> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `PointType` is never used
[INFO] [stdout]    --> src/main.rs:292:6
[INFO] [stdout]     |
[INFO] [stdout] 292 | enum PointType<T> {
[INFO] [stdout]     |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Result1` is never used
[INFO] [stdout]    --> src/main.rs:296:6
[INFO] [stdout]     |
[INFO] [stdout] 296 | enum Result1<T, E> {
[INFO] [stdout]     |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `call_generic_type` is never used
[INFO] [stdout]    --> src/main.rs:300:4
[INFO] [stdout]     |
[INFO] [stdout] 300 | fn call_generic_type() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `generic_type` is never used
[INFO] [stdout]    --> src/main.rs:304:4
[INFO] [stdout]     |
[INFO] [stdout] 304 | fn generic_type<T: std::cmp::PartialOrd + Copy>(arr: &[T]) -> T
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cacher` is never constructed
[INFO] [stdout]   --> src/main.rs:60:8
[INFO] [stdout]    |
[INFO] [stdout] 60 | struct Cacher<T>
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `value` are never used
[INFO] [stdout]   --> src/main.rs:72:8
[INFO] [stdout]    |
[INFO] [stdout] 67 | / impl<T> Cacher<T>
[INFO] [stdout] 68 | | where
[INFO] [stdout] 69 | |     T: Fn(u32) -> u32,
[INFO] [stdout]    | |______________________- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 72 |       fn new(calculation: T) -> Cacher<T> {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] ...
[INFO] [stdout] 76 |       fn value(&mut self, arg: u32) -> u32 {
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `excise_plan` is never used
[INFO] [stdout]   --> src/main.rs:87:4
[INFO] [stdout]    |
[INFO] [stdout] 87 | fn excise_plan() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `generate_workout` is never used
[INFO] [stdout]   --> src/main.rs:97:4
[INFO] [stdout]    |
[INFO] [stdout] 97 | fn generate_workout(intensity: u32, random_number: u32) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `mini_grep` is never used
[INFO] [stdout]    --> src/main.rs:127:4
[INFO] [stdout]     |
[INFO] [stdout] 127 | fn mini_grep() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest_with_an_announcement` is never used
[INFO] [stdout]    --> src/main.rs:156:4
[INFO] [stdout]     |
[INFO] [stdout] 156 | fn longest_with_an_announcement<'a, T>(x: &'a str, y: &'a str, ann: T) -> &'a str
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `static_lifecycle` is never used
[INFO] [stdout]    --> src/main.rs:168:4
[INFO] [stdout]     |
[INFO] [stdout] 168 | fn static_lifecycle() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_important_excerpt` is never used
[INFO] [stdout]    --> src/main.rs:172:4
[INFO] [stdout]     |
[INFO] [stdout] 172 | fn test_important_excerpt() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ImportantExcerpt` is never constructed
[INFO] [stdout]    --> src/main.rs:179:8
[INFO] [stdout]     |
[INFO] [stdout] 179 | struct ImportantExcerpt<'a> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest_test` is never used
[INFO] [stdout]    --> src/main.rs:184:4
[INFO] [stdout]     |
[INFO] [stdout] 184 | fn longest_test() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest` is never used
[INFO] [stdout]    --> src/main.rs:199:4
[INFO] [stdout]     |
[INFO] [stdout] 199 | fn longest<'a>(str1: &'a str, str2: &'a str) -> &'a str {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest_1` is never used
[INFO] [stdout]    --> src/main.rs:207:4
[INFO] [stdout]     |
[INFO] [stdout] 207 | fn longest_1<'a>(x: &'a str, y: &str) -> &'a str {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `lifecycle_null_ref` is never used
[INFO] [stdout]    --> src/main.rs:211:4
[INFO] [stdout]     |
[INFO] [stdout] 211 | fn lifecycle_null_ref() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `trait_test` is never used
[INFO] [stdout]    --> src/main.rs:224:4
[INFO] [stdout]     |
[INFO] [stdout] 224 | fn trait_test() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `returns_summarizable` is never used
[INFO] [stdout]    --> src/main.rs:231:4
[INFO] [stdout]     |
[INFO] [stdout] 231 | fn returns_summarizable() -> impl Summary {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `some_function` is never used
[INFO] [stdout]    --> src/main.rs:235:4
[INFO] [stdout]     |
[INFO] [stdout] 235 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `some_function_simple` is never used
[INFO] [stdout]    --> src/main.rs:239:4
[INFO] [stdout]     |
[INFO] [stdout] 239 | fn some_function_simple<T, U>(t: T, u: U) -> i32
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `trait_as_params_advanced` is never used
[INFO] [stdout]    --> src/main.rs:255:4
[INFO] [stdout]     |
[INFO] [stdout] 255 | fn trait_as_params_advanced(summary: &(impl Summary + SummaryAdvance)) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `trait_as_params` is never used
[INFO] [stdout]    --> src/main.rs:267:4
[INFO] [stdout]     |
[INFO] [stdout] 267 | fn trait_as_params(summary: &impl Summary) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PointPosition` is never constructed
[INFO] [stdout]    --> src/main.rs:288:8
[INFO] [stdout]     |
[INFO] [stdout] 288 | struct PointPosition<T> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `PointType` is never used
[INFO] [stdout]    --> src/main.rs:292:6
[INFO] [stdout]     |
[INFO] [stdout] 292 | enum PointType<T> {
[INFO] [stdout]     |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `panic` is never used
[INFO] [stdout]    --> src/main.rs:317:4
[INFO] [stdout]     |
[INFO] [stdout] 317 | fn panic() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Result1` is never used
[INFO] [stdout]    --> src/main.rs:296:6
[INFO] [stdout]     |
[INFO] [stdout] 296 | enum Result1<T, E> {
[INFO] [stdout]     |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hashmap` is never used
[INFO] [stdout]    --> src/main.rs:332:4
[INFO] [stdout]     |
[INFO] [stdout] 332 | fn hashmap() {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `call_generic_type` is never used
[INFO] [stdout]    --> src/main.rs:300:4
[INFO] [stdout]     |
[INFO] [stdout] 300 | fn call_generic_type() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `vector` is never used
[INFO] [stdout]    --> src/main.rs:343:4
[INFO] [stdout]     |
[INFO] [stdout] 343 | fn vector() {
[INFO] [stdout]     |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `generic_type` is never used
[INFO] [stdout]    --> src/main.rs:304:4
[INFO] [stdout]     |
[INFO] [stdout] 304 | fn generic_type<T: std::cmp::PartialOrd + Copy>(arr: &[T]) -> T
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `let_if_test` is never used
[INFO] [stdout]    --> src/main.rs:381:4
[INFO] [stdout]     |
[INFO] [stdout] 381 | fn let_if_test() {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `panic` is never used
[INFO] [stdout]    --> src/main.rs:317:4
[INFO] [stdout]     |
[INFO] [stdout] 317 | fn panic() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `option_test_v2` is never used
[INFO] [stdout]    --> src/main.rs:387:4
[INFO] [stdout]     |
[INFO] [stdout] 387 | fn option_test_v2() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hashmap` is never used
[INFO] [stdout]    --> src/main.rs:332:4
[INFO] [stdout]     |
[INFO] [stdout] 332 | fn hashmap() {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `plus_one` is never used
[INFO] [stdout]    --> src/main.rs:393:4
[INFO] [stdout]     |
[INFO] [stdout] 393 | fn plus_one(x: Option<i32>) -> Option<i32> {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `vector` is never used
[INFO] [stdout]    --> src/main.rs:343:4
[INFO] [stdout]     |
[INFO] [stdout] 343 | fn vector() {
[INFO] [stdout]     |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `value_in_cents` is never used
[INFO] [stdout]    --> src/main.rs:400:4
[INFO] [stdout]     |
[INFO] [stdout] 400 | fn value_in_cents(coin: Coin) -> u8 {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `let_if_test` is never used
[INFO] [stdout]    --> src/main.rs:381:4
[INFO] [stdout]     |
[INFO] [stdout] 381 | fn let_if_test() {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `State` is never used
[INFO] [stdout]    --> src/main.rs:412:6
[INFO] [stdout]     |
[INFO] [stdout] 412 | enum State {
[INFO] [stdout]     |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `option_test_v2` is never used
[INFO] [stdout]    --> src/main.rs:387:4
[INFO] [stdout]     |
[INFO] [stdout] 387 | fn option_test_v2() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Coin` is never used
[INFO] [stdout]    --> src/main.rs:416:6
[INFO] [stdout]     |
[INFO] [stdout] 416 | enum Coin {
[INFO] [stdout]     |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `option_test` is never used
[INFO] [stdout]    --> src/main.rs:423:4
[INFO] [stdout]     |
[INFO] [stdout] 423 | fn option_test() {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enum_test` is never used
[INFO] [stdout]    --> src/main.rs:428:4
[INFO] [stdout]     |
[INFO] [stdout] 428 | fn enum_test() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `IpAddrKind` is never used
[INFO] [stdout]    --> src/main.rs:434:6
[INFO] [stdout]     |
[INFO] [stdout] 434 | enum IpAddrKind {
[INFO] [stdout]     |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `plus_one` is never used
[INFO] [stdout]    --> src/main.rs:393:4
[INFO] [stdout]     |
[INFO] [stdout] 393 | fn plus_one(x: Option<i32>) -> Option<i32> {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `check` is never used
[INFO] [stdout]    --> src/main.rs:440:8
[INFO] [stdout]     |
[INFO] [stdout] 439 | impl IpAddrKind {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] 440 |     fn check(&self) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `value_in_cents` is never used
[INFO] [stdout]    --> src/main.rs:400:4
[INFO] [stdout]     |
[INFO] [stdout] 400 | fn value_in_cents(coin: Coin) -> u8 {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `related_function` is never used
[INFO] [stdout]    --> src/main.rs:444:4
[INFO] [stdout]     |
[INFO] [stdout] 444 | fn related_function() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Phone` is never constructed
[INFO] [stdout]    --> src/main.rs:450:8
[INFO] [stdout]     |
[INFO] [stdout] 450 | struct Phone {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `State` is never used
[INFO] [stdout]    --> src/main.rs:412:6
[INFO] [stdout]     |
[INFO] [stdout] 412 | enum State {
[INFO] [stdout]     |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Coin` is never used
[INFO] [stdout]    --> src/main.rs:416:6
[INFO] [stdout]     |
[INFO] [stdout] 416 | enum Coin {
[INFO] [stdout]     |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/main.rs:456:8
[INFO] [stdout]     |
[INFO] [stdout] 454 | impl Phone {
[INFO] [stdout]     | ---------- associated function in this implementation
[INFO] [stdout] 455 |     //注意:第一个参数不是&self
[INFO] [stdout] 456 |     fn new(color: String, shape: String) -> Phone {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `option_test` is never used
[INFO] [stdout]    --> src/main.rs:423:4
[INFO] [stdout]     |
[INFO] [stdout] 423 | fn option_test() {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `tangle_area_test` is never used
[INFO] [stdout]    --> src/main.rs:460:4
[INFO] [stdout]     |
[INFO] [stdout] 460 | fn tangle_area_test() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `tangle_area` is never used
[INFO] [stdout]    --> src/main.rs:466:4
[INFO] [stdout]     |
[INFO] [stdout] 466 | fn tangle_area(rectangle: &Rectangle) -> u32 {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enum_test` is never used
[INFO] [stdout]    --> src/main.rs:428:4
[INFO] [stdout]     |
[INFO] [stdout] 428 | fn enum_test() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]    --> src/main.rs:471:8
[INFO] [stdout]     |
[INFO] [stdout] 471 | struct Rectangle {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `IpAddrKind` is never used
[INFO] [stdout]    --> src/main.rs:434:6
[INFO] [stdout]     |
[INFO] [stdout] 434 | enum IpAddrKind {
[INFO] [stdout]     |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `area` is never used
[INFO] [stdout]    --> src/main.rs:478:8
[INFO] [stdout]     |
[INFO] [stdout] 476 | impl Rectangle {
[INFO] [stdout]     | -------------- method in this implementation
[INFO] [stdout] 477 |     //&self是 self:&Self 的缩写,之所以用& 表示这个方法借用了 Self 实例,而不获取所有权
[INFO] [stdout] 478 |     fn area(&self) -> u32 {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `check` is never used
[INFO] [stdout]    --> src/main.rs:440:8
[INFO] [stdout]     |
[INFO] [stdout] 439 | impl IpAddrKind {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] 440 |     fn check(&self) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Car` is never constructed
[INFO] [stdout]    --> src/main.rs:483:8
[INFO] [stdout]     |
[INFO] [stdout] 483 | struct Car;
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Laptop` is never constructed
[INFO] [stdout]    --> src/main.rs:485:8
[INFO] [stdout]     |
[INFO] [stdout] 485 | struct Laptop(String, u8);
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `tuple_struct` is never used
[INFO] [stdout]    --> src/main.rs:486:4
[INFO] [stdout]     |
[INFO] [stdout] 486 | fn tuple_struct() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Color` is never constructed
[INFO] [stdout]    --> src/main.rs:491:8
[INFO] [stdout]     |
[INFO] [stdout] 491 | struct Color(i32, i32, i32);
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]    --> src/main.rs:492:8
[INFO] [stdout]     |
[INFO] [stdout] 492 | struct Point(i32, i32, i32);
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `related_function` is never used
[INFO] [stdout]    --> src/main.rs:444:4
[INFO] [stdout]     |
[INFO] [stdout] 444 | fn related_function() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `build_user` is never used
[INFO] [stdout]    --> src/main.rs:493:4
[INFO] [stdout]     |
[INFO] [stdout] 493 | fn build_user(active: bool, username: String) -> User {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Phone` is never constructed
[INFO] [stdout]    --> src/main.rs:450:8
[INFO] [stdout]     |
[INFO] [stdout] 450 | struct Phone {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `struct_define` is never used
[INFO] [stdout]    --> src/main.rs:497:4
[INFO] [stdout]     |
[INFO] [stdout] 497 | fn struct_define() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]    --> src/main.rs:508:8
[INFO] [stdout]     |
[INFO] [stdout] 508 | struct User {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `slice_simple` is never used
[INFO] [stdout]    --> src/main.rs:515:4
[INFO] [stdout]     |
[INFO] [stdout] 515 | fn slice_simple() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `slice` is never used
[INFO] [stdout]    --> src/main.rs:527:4
[INFO] [stdout]     |
[INFO] [stdout] 527 | fn slice(s: &String) -> i32 {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/main.rs:456:8
[INFO] [stdout]     |
[INFO] [stdout] 454 | impl Phone {
[INFO] [stdout]     | ---------- associated function in this implementation
[INFO] [stdout] 455 |     //注意:第一个参数不是&self
[INFO] [stdout] 456 |     fn new(color: String, shape: String) -> Phone {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ownership` is never used
[INFO] [stdout]    --> src/main.rs:542:4
[INFO] [stdout]     |
[INFO] [stdout] 542 | fn ownership() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `tangle_area_test` is never used
[INFO] [stdout]    --> src/main.rs:460:4
[INFO] [stdout]     |
[INFO] [stdout] 460 | fn tangle_area_test() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_ownership_str` is never used
[INFO] [stdout]    --> src/main.rs:572:4
[INFO] [stdout]     |
[INFO] [stdout] 572 | fn take_ownership_str(s: String) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `tangle_area` is never used
[INFO] [stdout]    --> src/main.rs:466:4
[INFO] [stdout]     |
[INFO] [stdout] 466 | fn tangle_area(rectangle: &Rectangle) -> u32 {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_ownership_borrow` is never used
[INFO] [stdout]    --> src/main.rs:576:4
[INFO] [stdout]     |
[INFO] [stdout] 576 | fn take_ownership_borrow(s: &String) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]    --> src/main.rs:471:8
[INFO] [stdout]     |
[INFO] [stdout] 471 | struct Rectangle {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_ownership_borrow_success` is never used
[INFO] [stdout]    --> src/main.rs:581:4
[INFO] [stdout]     |
[INFO] [stdout] 581 | fn take_ownership_borrow_success(s: &mut String) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `area` is never used
[INFO] [stdout]    --> src/main.rs:478:8
[INFO] [stdout]     |
[INFO] [stdout] 476 | impl Rectangle {
[INFO] [stdout]     | -------------- method in this implementation
[INFO] [stdout] 477 |     //&self是 self:&Self 的缩写,之所以用& 表示这个方法借用了 Self 实例,而不获取所有权
[INFO] [stdout] 478 |     fn area(&self) -> u32 {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_ownership_int` is never used
[INFO] [stdout]    --> src/main.rs:587:4
[INFO] [stdout]     |
[INFO] [stdout] 587 | fn take_ownership_int(i: i32) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Car` is never constructed
[INFO] [stdout]    --> src/main.rs:483:8
[INFO] [stdout]     |
[INFO] [stdout] 483 | struct Car;
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `scope` is never used
[INFO] [stdout]    --> src/main.rs:592:4
[INFO] [stdout]     |
[INFO] [stdout] 592 | fn scope() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Laptop` is never constructed
[INFO] [stdout]    --> src/main.rs:485:8
[INFO] [stdout]     |
[INFO] [stdout] 485 | struct Laptop(String, u8);
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `variable_copy` is never used
[INFO] [stdout]    --> src/main.rs:602:4
[INFO] [stdout]     |
[INFO] [stdout] 602 | fn variable_copy() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `tuple_struct` is never used
[INFO] [stdout]    --> src/main.rs:486:4
[INFO] [stdout]     |
[INFO] [stdout] 486 | fn tuple_struct() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `string_type` is never used
[INFO] [stdout]    --> src/main.rs:621:4
[INFO] [stdout]     |
[INFO] [stdout] 621 | fn string_type() {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Color` is never constructed
[INFO] [stdout]    --> src/main.rs:491:8
[INFO] [stdout]     |
[INFO] [stdout] 491 | struct Color(i32, i32, i32);
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]    --> src/main.rs:492:8
[INFO] [stdout]     |
[INFO] [stdout] 492 | struct Point(i32, i32, i32);
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `foreach` is never used
[INFO] [stdout]    --> src/main.rs:648:4
[INFO] [stdout]     |
[INFO] [stdout] 648 | fn foreach() {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `build_user` is never used
[INFO] [stdout]    --> src/main.rs:493:4
[INFO] [stdout]     |
[INFO] [stdout] 493 | fn build_user(active: bool, username: String) -> User {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `condition_express` is never used
[INFO] [stdout]    --> src/main.rs:683:4
[INFO] [stdout]     |
[INFO] [stdout] 683 | fn condition_express(count: i32) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `return_express_function` is never used
[INFO] [stdout]    --> src/main.rs:697:4
[INFO] [stdout]     |
[INFO] [stdout] 697 | fn return_express_function() -> i32 {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `struct_define` is never used
[INFO] [stdout]    --> src/main.rs:497:4
[INFO] [stdout]     |
[INFO] [stdout] 497 | fn struct_define() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]    --> src/main.rs:508:8
[INFO] [stdout]     |
[INFO] [stdout] 508 | struct User {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `other_function` is never used
[INFO] [stdout]    --> src/main.rs:703:4
[INFO] [stdout]     |
[INFO] [stdout] 703 | fn other_function(x: i32) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `slice_simple` is never used
[INFO] [stdout]    --> src/main.rs:515:4
[INFO] [stdout]     |
[INFO] [stdout] 515 | fn slice_simple() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `data_type` is never used
[INFO] [stdout]    --> src/main.rs:713:4
[INFO] [stdout]     |
[INFO] [stdout] 713 | fn data_type() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `slice` is never used
[INFO] [stdout]    --> src/main.rs:527:4
[INFO] [stdout]     |
[INFO] [stdout] 527 | fn slice(s: &String) -> i32 {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `variables` is never used
[INFO] [stdout]    --> src/main.rs:763:4
[INFO] [stdout]     |
[INFO] [stdout] 763 | fn variables() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ownership` is never used
[INFO] [stdout]    --> src/main.rs:542:4
[INFO] [stdout]     |
[INFO] [stdout] 542 | fn ownership() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `guess` is never used
[INFO] [stdout]    --> src/main.rs:790:4
[INFO] [stdout]     |
[INFO] [stdout] 790 | fn guess() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_ownership_str` is never used
[INFO] [stdout]    --> src/main.rs:572:4
[INFO] [stdout]     |
[INFO] [stdout] 572 | fn take_ownership_str(s: String) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_ownership_borrow` is never used
[INFO] [stdout]    --> src/main.rs:576:4
[INFO] [stdout]     |
[INFO] [stdout] 576 | fn take_ownership_borrow(s: &String) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_ownership_borrow_success` is never used
[INFO] [stdout]    --> src/main.rs:581:4
[INFO] [stdout]     |
[INFO] [stdout] 581 | fn take_ownership_borrow_success(s: &mut String) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_ownership_int` is never used
[INFO] [stdout]    --> src/main.rs:587:4
[INFO] [stdout]     |
[INFO] [stdout] 587 | fn take_ownership_int(i: i32) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `scope` is never used
[INFO] [stdout]    --> src/main.rs:592:4
[INFO] [stdout]     |
[INFO] [stdout] 592 | fn scope() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]    --> src/main.rs:709:9
[INFO] [stdout]     |
[INFO] [stdout] 709 |         y + 1;
[INFO] [stdout]     |         ^^^^^ the arithmetic operation produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 709 |         let _ = y + 1;
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `variable_copy` is never used
[INFO] [stdout]    --> src/main.rs:602:4
[INFO] [stdout]     |
[INFO] [stdout] 602 | fn variable_copy() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `string_type` is never used
[INFO] [stdout]    --> src/main.rs:621:4
[INFO] [stdout]     |
[INFO] [stdout] 621 | fn string_type() {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `foreach` is never used
[INFO] [stdout]    --> src/main.rs:648:4
[INFO] [stdout]     |
[INFO] [stdout] 648 | fn foreach() {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `condition_express` is never used
[INFO] [stdout]    --> src/main.rs:683:4
[INFO] [stdout]     |
[INFO] [stdout] 683 | fn condition_express(count: i32) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `return_express_function` is never used
[INFO] [stdout]    --> src/main.rs:697:4
[INFO] [stdout]     |
[INFO] [stdout] 697 | fn return_express_function() -> i32 {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `other_function` is never used
[INFO] [stdout]    --> src/main.rs:703:4
[INFO] [stdout]     |
[INFO] [stdout] 703 | fn other_function(x: i32) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `data_type` is never used
[INFO] [stdout]    --> src/main.rs:713:4
[INFO] [stdout]     |
[INFO] [stdout] 713 | fn data_type() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `variables` is never used
[INFO] [stdout]    --> src/main.rs:763:4
[INFO] [stdout]     |
[INFO] [stdout] 763 | fn variables() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `guess` is never used
[INFO] [stdout]    --> src/main.rs:790:4
[INFO] [stdout]     |
[INFO] [stdout] 790 | fn guess() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]    --> src/main.rs:709:9
[INFO] [stdout]     |
[INFO] [stdout] 709 |         y + 1;
[INFO] [stdout]     |         ^^^^^ the arithmetic operation produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 709 |         let _ = y + 1;
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.53s
[INFO] running `Command { std: "docker" "inspect" "38b96fdd203878bbc1272fe9d018f3581105d5f86ea8a1a8e5663f5be52078fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38b96fdd203878bbc1272fe9d018f3581105d5f86ea8a1a8e5663f5be52078fc", kill_on_drop: false }`
[INFO] [stdout] 38b96fdd203878bbc1272fe9d018f3581105d5f86ea8a1a8e5663f5be52078fc