[INFO] cloning repository https://github.com/juliosouzam/learn-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/juliosouzam/learn-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjuliosouzam%2Flearn-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjuliosouzam%2Flearn-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3b4e5fc81641fc27af39d825f83d53ea3af7e6fa
[INFO] testing juliosouzam/learn-rust against beta-2022-02-22 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjuliosouzam%2Flearn-rust" "/workspace/builds/worker-40/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-40/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/juliosouzam/learn-rust on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/juliosouzam/learn-rust
[INFO] finished tweaking git repo https://github.com/juliosouzam/learn-rust
[INFO] tweaked toml for git repo https://github.com/juliosouzam/learn-rust written to /workspace/builds/worker-40/source/Cargo.toml
[INFO] crate git repo https://github.com/juliosouzam/learn-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] eeb98908609482db7651bb9b1dc44d12590f53f9911b0d67da6c0bc0a9b63111
[INFO] running `Command { std: "docker" "start" "-a" "eeb98908609482db7651bb9b1dc44d12590f53f9911b0d67da6c0bc0a9b63111", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eeb98908609482db7651bb9b1dc44d12590f53f9911b0d67da6c0bc0a9b63111", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eeb98908609482db7651bb9b1dc44d12590f53f9911b0d67da6c0bc0a9b63111", kill_on_drop: false }`
[INFO] [stdout] eeb98908609482db7651bb9b1dc44d12590f53f9911b0d67da6c0bc0a9b63111
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1ddfff522c64984e09ca3b270868d53f763ab14d91e5f5d9b03ac2315070affa
[INFO] running `Command { std: "docker" "start" "-a" "1ddfff522c64984e09ca3b270868d53f763ab14d91e5f5d9b03ac2315070affa", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling libc v0.2.108
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling syn v1.0.84
[INFO] [stderr]    Compiling unicode-width v0.1.9
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling quote v1.0.14
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling uuid v0.8.2
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]    Compiling thiserror v1.0.30
[INFO] [stderr]    Compiling structopt v0.3.25
[INFO] [stderr]    Compiling tasks v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `attempt_access`
[INFO] [stdout]   --> src/bin/a18b.rs:35:7
[INFO] [stdout]    |
[INFO] [stdout] 35 |   let attempt_access = try_access(employee)?;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_attempt_access`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `clamp`
[INFO] [stdout]  --> src/bin/a22.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn clamp(n: i32, lower: i32, upper: i32) -> i32 {
[INFO] [stdout]   |    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `range`
[INFO] [stdout]  --> src/bin/range.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let range = 1..=3;
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_range`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Maintenance`
[INFO] [stdout]  --> src/bin/a18b.rs:2:3
[INFO] [stdout]   |
[INFO] [stdout] 2 |   Maintenance,
[INFO] [stdout]   |   ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Marketing`
[INFO] [stdout]  --> src/bin/a18b.rs:3:3
[INFO] [stdout]   |
[INFO] [stdout] 3 |   Marketing,
[INFO] [stdout]   |   ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `range`
[INFO] [stdout]  --> src/bin/range.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let range = 1..4;
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_range`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Color`
[INFO] [stdout]  --> src/bin/docs.rs:2:6
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum Color {
[INFO] [stdout]   |      ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Mail`
[INFO] [stdout]  --> src/bin/docs.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct Mail {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `div`
[INFO] [stdout]   --> src/bin/a22.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn div(a: i32, b: i32) -> Option<i32> {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `add`
[INFO] [stdout]   --> src/bin/docs.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn add(a: i32, b: i32) -> i32 {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `concat`
[INFO] [stdout]   --> src/bin/a22.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn concat(first: &str, second: &str) -> String {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word_length`
[INFO] [stdout]   --> src/bin/map-combinator.rs:17:7
[INFO] [stdout]    |
[INFO] [stdout] 17 |   let word_length = maybe_word().map(|w| w.len()).map(|l| l * 2);
[INFO] [stdout]    |       ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_word_length`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `LineSupervisor`
[INFO] [stdout]  --> src/bin/a18b.rs:5:3
[INFO] [stdout]   |
[INFO] [stdout] 5 |   LineSupervisor,
[INFO] [stdout]   |   ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Admin`
[INFO] [stdout]  --> src/bin/a23.rs:3:3
[INFO] [stdout]   |
[INFO] [stdout] 3 |   Admin,
[INFO] [stdout]   |   ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `Access` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/bin/a23.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[derive(Debug, Eq, PartialEq)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Write`
[INFO] [stdout]  --> src/bin/p2.rs:3:21
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::{Read, Write};
[INFO] [stdout]   |                     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `maybe_num`
[INFO] [stdout]  --> src/bin/map-combinator.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn maybe_num() -> Option<i32> {
[INFO] [stdout]   |    ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/bin/a28.rs:20:30
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn new(color: Color) -> Self {
[INFO] [stdout]    |                             ---- expected `ShirtColor` because of return type
[INFO] [stdout] 19 |         match color {
[INFO] [stdout] 20 |             Color::Purple => Err("purple not allowed".to_owned()),
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected struct `ShirtColor`, found enum `Result`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected struct `ShirtColor`
[INFO] [stdout]                 found enum `Result<_, String>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `KitchenStaff`
[INFO] [stdout]  --> src/bin/a18b.rs:6:3
[INFO] [stdout]   |
[INFO] [stdout] 6 |   KitchenStaff,
[INFO] [stdout]   |   ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `AssemblyTech`
[INFO] [stdout]  --> src/bin/a18b.rs:7:3
[INFO] [stdout]   |
[INFO] [stdout] 7 |   AssemblyTech,
[INFO] [stdout]   |   ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Terminated`
[INFO] [stdout]   --> src/bin/a18b.rs:12:3
[INFO] [stdout]    |
[INFO] [stdout] 12 |   Terminated,
[INFO] [stdout]    |   ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `User`
[INFO] [stdout]  --> src/bin/a23.rs:4:3
[INFO] [stdout]   |
[INFO] [stdout] 4 |   User,
[INFO] [stdout]   |   ^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `Access` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/bin/a23.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[derive(Debug, Eq, PartialEq)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Guest`
[INFO] [stdout]  --> src/bin/a23.rs:5:3
[INFO] [stdout]   |
[INFO] [stdout] 5 |   Guest,
[INFO] [stdout]   |   ^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `Access` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/bin/a23.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[derive(Debug, Eq, PartialEq)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `maybe_access`
[INFO] [stdout]  --> src/bin/a23.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn maybe_access(name: &str) -> Option<Access> {
[INFO] [stdout]   |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `root`
[INFO] [stdout]   --> src/bin/a23.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn root() -> Option<Access> {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `part_1`
[INFO] [stdout]   --> src/bin/a23.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn part_1() -> bool {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `part_2`
[INFO] [stdout]   --> src/bin/a23.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn part_2() -> Option<Access> {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `part_3`
[INFO] [stdout]   --> src/bin/a23.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn part_3() -> Access {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]   --> src/bin/p2.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     name: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `Record` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/bin/p2.rs:8:10
[INFO] [stdout]    |
[INFO] [stdout] 8  | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `email`
[INFO] [stdout]   --> src/bin/p2.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     email: Option<String>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `Record` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/bin/p2.rs:8:10
[INFO] [stdout]    |
[INFO] [stdout] 8  | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `quis_2`
[INFO] [stdout]   --> src/bin/lifetimes.rs:25:41
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn get_first_quiz<'a>(quis_1: &'a Quiz, quis_2: &Quiz, quis_3: &Quiz) -> &'a Answer {
[INFO] [stdout]    |                                         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_quis_2`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `quis_3`
[INFO] [stdout]   --> src/bin/lifetimes.rs:25:56
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn get_first_quiz<'a>(quis_1: &'a Quiz, quis_2: &Quiz, quis_3: &Quiz) -> &'a Answer {
[INFO] [stdout]    |                                                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_quis_3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tasks` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]  --> src/bin/const.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 4 | /     if speed > MAX_SPEED {
[INFO] [stdout] 5 | |         MAX_SPEED
[INFO] [stdout]   | |         ^^^^^^^^^ expected `()`, found `i32`
[INFO] [stdout] 6 | |     }
[INFO] [stdout]   | |_____- expected this to be `()`
[INFO] [stdout]   |
[INFO] [stdout] help: you might have meant to return this value
[INFO] [stdout]   |
[INFO] [stdout] 5 |         return MAX_SPEED;
[INFO] [stdout]   |         ++++++          +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `No`
[INFO] [stdout]  --> src/bin/lifetimes.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     No,
[INFO] [stdout]   |     ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `Answer` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/bin/lifetimes.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[derive(Debug)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `question`
[INFO] [stdout]  --> src/bin/lifetimes.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     question: &'a Answer,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `Form` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/bin/lifetimes.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 | #[derive(Debug)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `question`
[INFO] [stdout]   --> src/bin/lifetimes.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     question: Answer,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `Quiz` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/bin/lifetimes.rs:20:10
[INFO] [stdout]    |
[INFO] [stdout] 20 | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_first_quiz`
[INFO] [stdout]   --> src/bin/lifetimes.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn get_first_quiz<'a>(quis_1: &'a Quiz, quis_2: &Quiz, quis_3: &Quiz) -> &'a Answer {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `user_id`
[INFO] [stdout]  --> src/bin/a21.rs:3:3
[INFO] [stdout]   |
[INFO] [stdout] 3 |   user_id: i32,
[INFO] [stdout]   |   ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `User` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/bin/a21.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[derive(Debug)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]  --> src/bin/a21.rs:4:3
[INFO] [stdout]   |
[INFO] [stdout] 4 |   name: String,
[INFO] [stdout]   |   ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `User` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/bin/a21.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[derive(Debug)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `all_caps`
[INFO] [stdout]  --> src/bin/testing.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn all_caps(word: &str) -> String {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected `;`, found keyword `let`
[INFO] [stdout]   --> src/bin/iterators.rs:11:63
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let find_me: Option<i32> = numbers.iter().find(|n| n == 3)
[INFO] [stdout]    |                                                               ^ help: add `;` here
[INFO] [stdout] 12 |     let count = numbers.iter().count();
[INFO] [stdout]    |     --- unexpected token
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `content`
[INFO] [stdout]  --> src/bin/hashmap.rs:5:3
[INFO] [stdout]   |
[INFO] [stdout] 5 |   content: String,
[INFO] [stdout]   |   ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `Contents` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/bin/hashmap.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | #[derive(Debug)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a_is_some`
[INFO] [stdout]  --> src/bin/opt_combinators.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 |   let a_is_some = a.is_some();
[INFO] [stdout]   |       ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_a_is_some`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a_is_none`
[INFO] [stdout]  --> src/bin/opt_combinators.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 |   let a_is_none = a.is_none();
[INFO] [stdout]   |       ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_a_is_none`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a_mapped`
[INFO] [stdout]  --> src/bin/opt_combinators.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 |   let a_mapped = a.map(|num| num + 1);
[INFO] [stdout]   |       ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_a_mapped`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a_filtered`
[INFO] [stdout]  --> src/bin/opt_combinators.rs:6:7
[INFO] [stdout]   |
[INFO] [stdout] 6 |   let a_filtered = a.filter(|num| num == &1);
[INFO] [stdout]   |       ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_a_filtered`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a_or_else`
[INFO] [stdout]  --> src/bin/opt_combinators.rs:7:7
[INFO] [stdout]   |
[INFO] [stdout] 7 |   let a_or_else = a.or_else(|| Some(5));
[INFO] [stdout]   |       ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_a_or_else`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `unwrapped`
[INFO] [stdout]  --> src/bin/opt_combinators.rs:8:7
[INFO] [stdout]   |
[INFO] [stdout] 8 |   let unwrapped = a.unwrap_or_else(|| 0);
[INFO] [stdout]   |       ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unwrapped`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: function `hi` is private
[INFO] [stdout]   --> src/bin/modules.rs:28:10
[INFO] [stdout]    |
[INFO] [stdout] 28 |   greet::hi();
[INFO] [stdout]    |          ^^ private function
[INFO] [stdout]    |
[INFO] [stdout] note: the function `hi` is defined here
[INFO] [stdout]   --> src/bin/modules.rs:6:3
[INFO] [stdout]    |
[INFO] [stdout] 6  |   fn hi() {
[INFO] [stdout]    |   ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: function `add` is private
[INFO] [stdout]   --> src/bin/modules.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |   math::add(3, 6);
[INFO] [stdout]    |         ^^^ private function
[INFO] [stdout]    |
[INFO] [stdout] note: the function `add` is defined here
[INFO] [stdout]   --> src/bin/modules.rs:16:3
[INFO] [stdout]    |
[INFO] [stdout] 16 |   fn add(a: i32, b: i32) -> i32 {
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/bin/modules.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/bin/modules.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 |   use std::collections::HashMap;
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0603`.
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> src/bin/default-trait.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let p = Package::default();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `position`
[INFO] [stdout]   --> src/bin/derive.rs:10:3
[INFO] [stdout]    |
[INFO] [stdout] 10 |   position: Position,
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `Employee` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/bin/derive.rs:8:10
[INFO] [stdout]    |
[INFO] [stdout] 8  | #[derive(Debug, Clone, Copy)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `work_hours`
[INFO] [stdout]   --> src/bin/derive.rs:11:3
[INFO] [stdout]    |
[INFO] [stdout] 11 |   work_hours: i64,
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `Employee` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/bin/derive.rs:8:10
[INFO] [stdout]    |
[INFO] [stdout] 8  | #[derive(Debug, Clone, Copy)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `SqlError` in this scope
[INFO] [stdout]  --> src/bin/custom-errors.rs:6:27
[INFO] [stdout]   |
[INFO] [stdout] 6 |     DatabaseError(#[from] SqlError),
[INFO] [stdout]   |                           ^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/bin/iterators.rs:10:62
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let new_numbers: Vec<_> = numbers.iter().filter(|n| n >= 3).collect();
[INFO] [stdout]    |                                                              ^ expected `&&_`, found integer
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected reference `&&_`
[INFO] [stdout]                    found type `{integer}`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `weight`
[INFO] [stdout]  --> src/bin/default-trait.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     weight: f64,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]  --> src/bin/default-trait.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 |     fn new(weight: f64) -> Self {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: can't compare `&&{integer}` with `{integer}`
[INFO] [stdout]   --> src/bin/iterators.rs:11:58
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let find_me: Option<i32> = numbers.iter().find(|n| n == 3)
[INFO] [stdout]    |                                                          ^^ no implementation for `&&{integer} == {integer}`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `PartialEq<{integer}>` is not implemented for `&&{integer}`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `SqlError` in this scope
[INFO] [stdout]  --> src/bin/custom-errors.rs:6:27
[INFO] [stdout]   |
[INFO] [stdout] 3 | #[derive(Error, Debug)]
[INFO] [stdout]   |               - help: you might be missing a type parameter: `<SqlError>`
[INFO] [stdout] ...
[INFO] [stdout] 6 |     DatabaseError(#[from] SqlError),
[INFO] [stdout]   |                           ^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Connection` in this scope
[INFO] [stdout]   --> src/bin/custom-errors.rs:22:28
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn login(user: &str, password: &str) -> Result<String, LoginError> {
[INFO] [stdout]    |         - help: you might be missing a type parameter: `<Connection>`
[INFO] [stdout] 22 |     let connection: Result<Connection, std::io::Error> = connect()?;
[INFO] [stdout]    |                            ^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `connect` in this scope
[INFO] [stdout]   --> src/bin/custom-errors.rs:22:58
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let connection: Result<Connection, std::io::Error> = connect()?;
[INFO] [stdout]    |                                                          ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `get_user_id` in this scope
[INFO] [stdout]   --> src/bin/custom-errors.rs:23:19
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let user_id = get_user_id();
[INFO] [stdout]    |                   ^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `try_password` in this scope
[INFO] [stdout]   --> src/bin/custom-errors.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 |     if try_password(user_id, password)? {
[INFO] [stdout]    |        ^^^^^^^^^^^^ help: a local variable with a similar name exists: `password`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `SqlError` in this scope
[INFO] [stdout]   --> src/bin/custom-errors.rs:26:37
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn login(user: &str, password: &str) -> Result<String, LoginError> {
[INFO] [stdout]    |         - help: you might be missing a type parameter: `<SqlError>`
[INFO] [stdout] ...
[INFO] [stdout] 26 |         let session: Result<String, SqlError> = get_session(user_id);
[INFO] [stdout]    |                                     ^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `get_session` in this scope
[INFO] [stdout]   --> src/bin/custom-errors.rs:26:49
[INFO] [stdout]    |
[INFO] [stdout] 26 |         let session: Result<String, SqlError> = get_session(user_id);
[INFO] [stdout]    |                                                 ^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/bin/iterators.rs:11:32
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let find_me: Option<i32> = numbers.iter().find(|n| n == 3)
[INFO] [stdout]    |                  -----------   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `i32`, found `&{integer}`
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  expected due to this
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected enum `Option<i32>`
[INFO] [stdout]               found enum `Option<&{integer}>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Blue`
[INFO] [stdout]  --> src/bin/if-let-else.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     Blue,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Green`
[INFO] [stdout]  --> src/bin/if-let-else.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     Green,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `add`
[INFO] [stdout]  --> src/bin/closure.rs:6:7
[INFO] [stdout]   |
[INFO] [stdout] 6 |   let add = |a: i32, b: i32| -> i32 { a + b };
[INFO] [stdout]   |       ^^^ help: if this is intentional, prefix it with an underscore: `_add`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sum`
[INFO] [stdout]  --> src/bin/closure.rs:8:7
[INFO] [stdout]   |
[INFO] [stdout] 8 |   let sum = add(1, 2);
[INFO] [stdout]   |       ^^^ help: if this is intentional, prefix it with an underscore: `_sum`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 8 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0412, E0425.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0412`.
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "1ddfff522c64984e09ca3b270868d53f763ab14d91e5f5d9b03ac2315070affa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ddfff522c64984e09ca3b270868d53f763ab14d91e5f5d9b03ac2315070affa", kill_on_drop: false }`
[INFO] [stdout] 1ddfff522c64984e09ca3b270868d53f763ab14d91e5f5d9b03ac2315070affa