[INFO] cloning repository https://github.com/kodmanyagha/tokio-tutor
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kodmanyagha/tokio-tutor" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkodmanyagha%2Ftokio-tutor", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkodmanyagha%2Ftokio-tutor'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fbc09e3f6a6a9891fd7cad6e886637b39239351e
[INFO] checking kodmanyagha/tokio-tutor against master#d2eadb7a94ef8c9deb5137695df33cd1fc5aee92 for pr-137268
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkodmanyagha%2Ftokio-tutor" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kodmanyagha/tokio-tutor on toolchain d2eadb7a94ef8c9deb5137695df33cd1fc5aee92
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d2eadb7a94ef8c9deb5137695df33cd1fc5aee92" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kodmanyagha/tokio-tutor
[INFO] finished tweaking git repo https://github.com/kodmanyagha/tokio-tutor
[INFO] tweaked toml for git repo https://github.com/kodmanyagha/tokio-tutor written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/kodmanyagha/tokio-tutor 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" "+d2eadb7a94ef8c9deb5137695df33cd1fc5aee92" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pairing v0.23.0
[INFO] [stderr]   Downloaded pest_generator v2.7.11
[INFO] [stderr]   Downloaded liquid v0.26.8
[INFO] [stderr]   Downloaded pest_meta v2.7.11
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[INFO] [stderr]   Downloaded pest v2.7.11
[INFO] [stderr]   Downloaded clap_derive v4.5.11
[INFO] [stderr]   Downloaded clap_builder v4.5.11
[INFO] [stderr]   Downloaded kstring v2.0.2
[INFO] [stderr]   Downloaded reqwest_cookie_store v0.6.0
[INFO] [stderr]   Downloaded bellman v0.14.0
[INFO] [stderr]   Downloaded pest_derive v2.7.11
[INFO] [stderr]   Downloaded tokio-websockets v0.8.3
[INFO] [stderr]   Downloaded liquid-core v0.26.8
[INFO] [stderr]   Downloaded liquid-lib v0.26.8
[INFO] [stderr]   Downloaded httpc-test v0.1.9
[INFO] [stderr]   Downloaded liquid-derive v0.26.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+d2eadb7a94ef8c9deb5137695df33cd1fc5aee92" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 478bef7c141b1bb28280aa2dcb57205a38c3f8b55afbfcd325f0db0749f95932
[INFO] running `Command { std: "docker" "start" "-a" "478bef7c141b1bb28280aa2dcb57205a38c3f8b55afbfcd325f0db0749f95932", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "478bef7c141b1bb28280aa2dcb57205a38c3f8b55afbfcd325f0db0749f95932", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "478bef7c141b1bb28280aa2dcb57205a38c3f8b55afbfcd325f0db0749f95932", kill_on_drop: false }`
[INFO] [stdout] 478bef7c141b1bb28280aa2dcb57205a38c3f8b55afbfcd325f0db0749f95932
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+d2eadb7a94ef8c9deb5137695df33cd1fc5aee92" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 963af562e0837853495ea576b9d5bf0343123c97539547addc808532ad9b6c4c
[INFO] running `Command { std: "docker" "start" "-a" "963af562e0837853495ea576b9d5bf0343123c97539547addc808532ad9b6c4c", kill_on_drop: false }`
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[INFO] [stderr]    Compiling tempfile v3.10.1
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[INFO] [stderr]    Compiling sqlx-mysql v0.7.4
[INFO] [stderr]     Checking liquid-lib v0.26.8
[INFO] [stderr]     Checking hyper v0.14.30
[INFO] [stderr]     Checking tokio-native-tls v0.3.1
[INFO] [stderr]    Compiling sqlx-macros-core v0.7.4
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[INFO] [stderr]    Compiling sqlx-macros v0.7.4
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[INFO] [stderr]     Checking sqlx v0.7.4
[INFO] [stderr]     Checking tokio-tutor v0.1.0 (/opt/rustwide/workdir)
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[INFO] [stdout] warning: unused import: `Error`
[INFO] [stdout]  --> src/bin/howtocodeit/create_user.rs:3:22
[INFO] [stdout]   |
[INFO] [stdout] 3 | use anyhow::{anyhow, Error};
[INFO] [stdout]   |                      ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `mpsc`
[INFO] [stdout]  --> src/bin/howtocodeit/thread_example.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 |     sync::{mpsc, Arc},
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `borrow::Borrow`
[INFO] [stdout]  --> src/bin/enc/main.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::Borrow, path::PathBuf, slice};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `chrono::Timelike`
[INFO] [stdout]  --> src/bin/enc/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use chrono::Timelike;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `bail`
[INFO] [stdout]  --> src/bin/tokio_tutor/redis_client.rs:1:22
[INFO] [stdout]   |
[INFO] [stdout] 1 | use anyhow::{anyhow, bail};
[INFO] [stdout]   |                      ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Buffer`
[INFO] [stdout]  --> src/bin/tokio_tutor/redis_client.rs:2:26
[INFO] [stdout]   |
[INFO] [stdout] 2 | use mini_redis::{client, Buffer};
[INFO] [stdout]   |                          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `anyhow` and `bail`
[INFO] [stdout]  --> src/bin/tokio_tutor/main.rs:4:14
[INFO] [stdout]   |
[INFO] [stdout] 4 | use anyhow::{anyhow, bail};
[INFO] [stdout]   |              ^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Buffer` and `client`
[INFO] [stdout]  --> src/bin/tokio_tutor/main.rs:5:18
[INFO] [stdout]   |
[INFO] [stdout] 5 | use mini_redis::{client, Buffer};
[INFO] [stdout]   |                  ^^^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `redis_client::redis_client`
[INFO] [stdout]  --> src/bin/tokio_tutor/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use redis_client::redis_client;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/bin/howtocodeit/thread_example.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let x = String::from("test");
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Error`
[INFO] [stdout]  --> src/bin/railway_example/main.rs:1:22
[INFO] [stdout]   |
[INFO] [stdout] 1 | use anyhow::{anyhow, Error};
[INFO] [stdout]   |                      ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `doubled`
[INFO] [stdout]   --> src/bin/howtocodeit/trait_example.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |         let doubled: Vec<_> = nums.iter().map(|n| n * 2).collect();
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_doubled`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `doubled`
[INFO] [stdout]   --> src/bin/howtocodeit/trait_example.rs:40:13
[INFO] [stdout]    |
[INFO] [stdout] 40 |         let doubled = nums.iter().map(|n| n * 2).collect::<Vec<_>>();
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_doubled`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id`, `email`, and `password` are never read
[INFO] [stdout]    --> src/bin/howtocodeit/create_user.rs:102:5
[INFO] [stdout]     |
[INFO] [stdout] 101 | pub struct User {
[INFO] [stdout]     |            ---- fields in this struct
[INFO] [stdout] 102 |     id: String,
[INFO] [stdout]     |     ^^
[INFO] [stdout] 103 |     username: Username,
[INFO] [stdout] 104 |     email: EmailAddress,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 105 |     password: Password,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/howtocodeit/main.rs:62:5
[INFO] [stdout]    |
[INFO] [stdout] 62 |     run_trait_example();
[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] 62 |     let _ = run_trait_example();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `calculate_two_numbers` is never used
[INFO] [stdout]   --> src/bin/railway_example/main.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn calculate_two_numbers(
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/bin/enc/main.rs:87:9
[INFO] [stdout]    |
[INFO] [stdout] 87 |     let x = {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `anyhow::anyhow`
[INFO] [stdout]  --> src/bin/sqlx_tutor/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use anyhow::anyhow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `mysql::MySqlPoolOptions`
[INFO] [stdout]  --> src/bin/sqlx_tutor/main.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | use sqlx::{mysql::MySqlPoolOptions, prelude::FromRow};
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::any::Any`
[INFO] [stdout]  --> src/bin/sqlx_tutor/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::any::Any;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Index`
[INFO] [stdout]  --> src/bin/sqlx_tutor/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::ops::Index;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sqlx::mysql::MySqlColumn`
[INFO] [stdout]  --> src/bin/sqlx_tutor/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use sqlx::mysql::MySqlColumn;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sqlx::mysql::MySqlTypeInfo`
[INFO] [stdout]   --> src/bin/sqlx_tutor/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use sqlx::mysql::MySqlTypeInfo;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sqlx::types::time::Date`
[INFO] [stdout]   --> src/bin/sqlx_tutor/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use sqlx::types::time::Date;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sqlx::Type`
[INFO] [stdout]   --> src/bin/sqlx_tutor/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use sqlx::Type;
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sqlx::ValueRef`
[INFO] [stdout]   --> src/bin/sqlx_tutor/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use sqlx::ValueRef;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Error`, `MySqlPool`, `MySql`, and `Pool`
[INFO] [stdout]   --> src/bin/sqlx_tutor/main.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | use sqlx::{Error, MySql, MySqlPool, Pool, Row};
[INFO] [stdout]    |            ^^^^^  ^^^^^  ^^^^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `time::macros::format_description`
[INFO] [stdout]   --> src/bin/sqlx_tutor/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use time::macros::format_description;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ref3`
[INFO] [stdout]    --> src/bin/lifetime_example/main.rs:141:9
[INFO] [stdout]     |
[INFO] [stdout] 141 |     let ref3 = lifetime_1(ref1, ref2);
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_ref3`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `b` is never read
[INFO] [stdout]  --> src/bin/lifetime_example/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct S<'long: 'short, 'short> {
[INFO] [stdout]   |        - field in this struct
[INFO] [stdout] 7 |     a: &'long str,
[INFO] [stdout] 8 |     b: &'short str,
[INFO] [stdout]   |     ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `attempt_1` is never used
[INFO] [stdout]    --> src/bin/lifetime_example/main.rs:132:4
[INFO] [stdout]     |
[INFO] [stdout] 132 | fn attempt_1() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `lifetime_1` is never used
[INFO] [stdout]    --> src/bin/lifetime_example/main.rs:149:4
[INFO] [stdout]     |
[INFO] [stdout] 149 | fn lifetime_1<'a>(ref1: &'a String, ref2: &'a String) -> &'a String {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `walk` and `look` are never used
[INFO] [stdout]   --> src/bin/enc/main.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | trait AnimalMovement {
[INFO] [stdout]    |       -------------- methods in this trait
[INFO] [stdout] 30 |     fn run(&self);
[INFO] [stdout] 31 |     fn walk(&self);
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 32 |     fn talk(&self);
[INFO] [stdout] 33 |     fn look(&self, x: f32, y: f32, z: f32);
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/bin/axum_todo/main.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let x = liquid::partials::InMemorySource::new();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `matches`
[INFO] [stdout]   --> src/bin/sqlx_tutor/main.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let matches = command!()
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_matches`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/bin/sqlx_tutor/main.rs:109:9
[INFO] [stdout]     |
[INFO] [stdout] 109 |     let x = single_result.columns();
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `id`
[INFO] [stdout]    --> src/bin/sqlx_tutor/main.rs:110:9
[INFO] [stdout]     |
[INFO] [stdout] 110 |     let id: String = single_result.get(0);
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]    --> src/bin/sqlx_tutor/main.rs:119:16
[INFO] [stdout]     |
[INFO] [stdout] 119 |         .map(|(index, row)| {
[INFO] [stdout]     |                ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Lion` is never constructed
[INFO] [stdout]   --> src/bin/copy_clone/main.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | struct Lion;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Lion` has a derived impl for the trait `Default`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking httpc-test v0.1.9
[INFO] [stdout] warning: field `username` is never read
[INFO] [stdout]   --> src/bin/thread_tutor/main.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct User<'a> {
[INFO] [stdout]    |        ---- field in this struct
[INFO] [stdout] 11 |     pub id: u64,
[INFO] [stdout] 12 |     pub username: &'a str,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `User` has derived impls for the traits `Default` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `redis_client` is never used
[INFO] [stdout]  --> src/bin/tokio_tutor/redis_client.rs:4:14
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub async fn redis_client() -> anyhow::Result<()> {
[INFO] [stdout]   |              ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main_page` is never used
[INFO] [stdout]   --> src/bin/axum_todo/main.rs:70:10
[INFO] [stdout]    |
[INFO] [stdout] 70 | async fn main_page() -> Html<String> {
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Error`
[INFO] [stdout]  --> src/bin/railway_example/main.rs:1:22
[INFO] [stdout]   |
[INFO] [stdout] 1 | use anyhow::{anyhow, Error};
[INFO] [stdout]   |                      ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `anyhow::anyhow`
[INFO] [stdout]  --> src/bin/sqlx_tutor/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use anyhow::anyhow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `mysql::MySqlPoolOptions`
[INFO] [stdout]  --> src/bin/sqlx_tutor/main.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | use sqlx::{mysql::MySqlPoolOptions, prelude::FromRow};
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::any::Any`
[INFO] [stdout]  --> src/bin/sqlx_tutor/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::any::Any;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Index`
[INFO] [stdout]  --> src/bin/sqlx_tutor/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::ops::Index;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sqlx::mysql::MySqlColumn`
[INFO] [stdout]  --> src/bin/sqlx_tutor/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use sqlx::mysql::MySqlColumn;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sqlx::mysql::MySqlTypeInfo`
[INFO] [stdout]   --> src/bin/sqlx_tutor/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use sqlx::mysql::MySqlTypeInfo;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sqlx::types::time::Date`
[INFO] [stdout]   --> src/bin/sqlx_tutor/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use sqlx::types::time::Date;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sqlx::Type`
[INFO] [stdout]   --> src/bin/sqlx_tutor/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use sqlx::Type;
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sqlx::ValueRef`
[INFO] [stdout]   --> src/bin/sqlx_tutor/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use sqlx::ValueRef;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Error`, `MySqlPool`, `MySql`, and `Pool`
[INFO] [stdout]   --> src/bin/sqlx_tutor/main.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | use sqlx::{Error, MySql, MySqlPool, Pool, Row};
[INFO] [stdout]    |            ^^^^^  ^^^^^  ^^^^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `time::macros::format_description`
[INFO] [stdout]   --> src/bin/sqlx_tutor/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use time::macros::format_description;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `bail`
[INFO] [stdout]  --> src/bin/tokio_tutor/redis_client.rs:1:22
[INFO] [stdout]   |
[INFO] [stdout] 1 | use anyhow::{anyhow, bail};
[INFO] [stdout]   |                      ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Buffer`
[INFO] [stdout]  --> src/bin/tokio_tutor/redis_client.rs:2:26
[INFO] [stdout]   |
[INFO] [stdout] 2 | use mini_redis::{client, Buffer};
[INFO] [stdout]   |                          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `anyhow` and `bail`
[INFO] [stdout]  --> src/bin/tokio_tutor/main.rs:4:14
[INFO] [stdout]   |
[INFO] [stdout] 4 | use anyhow::{anyhow, bail};
[INFO] [stdout]   |              ^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Buffer` and `client`
[INFO] [stdout]  --> src/bin/tokio_tutor/main.rs:5:18
[INFO] [stdout]   |
[INFO] [stdout] 5 | use mini_redis::{client, Buffer};
[INFO] [stdout]   |                  ^^^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `calculate_two_numbers` is never used
[INFO] [stdout]   --> src/bin/railway_example/main.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn calculate_two_numbers(
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `redis_client::redis_client`
[INFO] [stdout]  --> src/bin/tokio_tutor/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use redis_client::redis_client;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `matches`
[INFO] [stdout]   --> src/bin/sqlx_tutor/main.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let matches = command!()
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_matches`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/bin/sqlx_tutor/main.rs:109:9
[INFO] [stdout]     |
[INFO] [stdout] 109 |     let x = single_result.columns();
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `id`
[INFO] [stdout]    --> src/bin/sqlx_tutor/main.rs:110:9
[INFO] [stdout]     |
[INFO] [stdout] 110 |     let id: String = single_result.get(0);
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]    --> src/bin/sqlx_tutor/main.rs:119:16
[INFO] [stdout]     |
[INFO] [stdout] 119 |         .map(|(index, row)| {
[INFO] [stdout]     |                ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `borrow::Borrow`
[INFO] [stdout]  --> src/bin/enc/main.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::Borrow, path::PathBuf, slice};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `chrono::Timelike`
[INFO] [stdout]  --> src/bin/enc/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use chrono::Timelike;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ref3`
[INFO] [stdout]    --> src/bin/lifetime_example/main.rs:141:9
[INFO] [stdout]     |
[INFO] [stdout] 141 |     let ref3 = lifetime_1(ref1, ref2);
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_ref3`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `b` is never read
[INFO] [stdout]  --> src/bin/lifetime_example/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct S<'long: 'short, 'short> {
[INFO] [stdout]   |        - field in this struct
[INFO] [stdout] 7 |     a: &'long str,
[INFO] [stdout] 8 |     b: &'short str,
[INFO] [stdout]   |     ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `attempt_1` is never used
[INFO] [stdout]    --> src/bin/lifetime_example/main.rs:132:4
[INFO] [stdout]     |
[INFO] [stdout] 132 | fn attempt_1() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `lifetime_1` is never used
[INFO] [stdout]    --> src/bin/lifetime_example/main.rs:149:4
[INFO] [stdout]     |
[INFO] [stdout] 149 | fn lifetime_1<'a>(ref1: &'a String, ref2: &'a String) -> &'a String {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Lion` is never constructed
[INFO] [stdout]   --> src/bin/copy_clone/main.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | struct Lion;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Lion` has a derived impl for the trait `Default`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/bin/enc/main.rs:87:9
[INFO] [stdout]    |
[INFO] [stdout] 87 |     let x = {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `redis_client` is never used
[INFO] [stdout]  --> src/bin/tokio_tutor/redis_client.rs:4:14
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub async fn redis_client() -> anyhow::Result<()> {
[INFO] [stdout]   |              ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `walk` and `look` are never used
[INFO] [stdout]   --> src/bin/enc/main.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | trait AnimalMovement {
[INFO] [stdout]    |       -------------- methods in this trait
[INFO] [stdout] 30 |     fn run(&self);
[INFO] [stdout] 31 |     fn walk(&self);
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 32 |     fn talk(&self);
[INFO] [stdout] 33 |     fn look(&self, x: f32, y: f32, z: f32);
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Error`
[INFO] [stdout]  --> src/bin/howtocodeit/create_user.rs:3:22
[INFO] [stdout]   |
[INFO] [stdout] 3 | use anyhow::{anyhow, Error};
[INFO] [stdout]   |                      ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `mpsc`
[INFO] [stdout]  --> src/bin/howtocodeit/thread_example.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 |     sync::{mpsc, Arc},
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/bin/axum_todo/main.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let x = liquid::partials::InMemorySource::new();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `username` is never read
[INFO] [stdout]   --> src/bin/thread_tutor/main.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct User<'a> {
[INFO] [stdout]    |        ---- field in this struct
[INFO] [stdout] 11 |     pub id: u64,
[INFO] [stdout] 12 |     pub username: &'a str,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `User` has derived impls for the traits `Default` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main_page` is never used
[INFO] [stdout]   --> src/bin/axum_todo/main.rs:70:10
[INFO] [stdout]    |
[INFO] [stdout] 70 | async fn main_page() -> Html<String> {
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/bin/howtocodeit/thread_example.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let x = String::from("test");
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `doubled`
[INFO] [stdout]   --> src/bin/howtocodeit/trait_example.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |         let doubled: Vec<_> = nums.iter().map(|n| n * 2).collect();
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_doubled`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `doubled`
[INFO] [stdout]   --> src/bin/howtocodeit/trait_example.rs:40:13
[INFO] [stdout]    |
[INFO] [stdout] 40 |         let doubled = nums.iter().map(|n| n * 2).collect::<Vec<_>>();
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_doubled`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id`, `email`, and `password` are never read
[INFO] [stdout]    --> src/bin/howtocodeit/create_user.rs:102:5
[INFO] [stdout]     |
[INFO] [stdout] 101 | pub struct User {
[INFO] [stdout]     |            ---- fields in this struct
[INFO] [stdout] 102 |     id: String,
[INFO] [stdout]     |     ^^
[INFO] [stdout] 103 |     username: Username,
[INFO] [stdout] 104 |     email: EmailAddress,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 105 |     password: Password,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/howtocodeit/main.rs:62:5
[INFO] [stdout]    |
[INFO] [stdout] 62 |     run_trait_example();
[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] 62 |     let _ = run_trait_example();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 41s
[INFO] running `Command { std: "docker" "inspect" "963af562e0837853495ea576b9d5bf0343123c97539547addc808532ad9b6c4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "963af562e0837853495ea576b9d5bf0343123c97539547addc808532ad9b6c4c", kill_on_drop: false }`
[INFO] [stdout] 963af562e0837853495ea576b9d5bf0343123c97539547addc808532ad9b6c4c