[INFO] cloning repository https://github.com/aoiku/grep
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/aoiku/grep" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faoiku%2Fgrep", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faoiku%2Fgrep'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ab5f477eb057cd399443e0854df7f29d8c9f9432
[INFO] checking aoiku/grep against master#e9182f195b8505c87c4bd055b9f6e114ccda0981 for pr-144098
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faoiku%2Fgrep" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/aoiku/grep
[INFO] finished tweaking git repo https://github.com/aoiku/grep
[INFO] tweaked toml for git repo https://github.com/aoiku/grep written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/aoiku/grep on toolchain e9182f195b8505c87c4bd055b9f6e114ccda0981
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e9182f195b8505c87c4bd055b9f6e114ccda0981" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/aoiku/grep 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" "+e9182f195b8505c87c4bd055b9f6e114ccda0981" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+e9182f195b8505c87c4bd055b9f6e114ccda0981" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9f80e68cdb948674c0c68eb346f2ba3fe2b27b5722180b0cb7545490b451fe8e
[INFO] running `Command { std: "docker" "start" "-a" "9f80e68cdb948674c0c68eb346f2ba3fe2b27b5722180b0cb7545490b451fe8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9f80e68cdb948674c0c68eb346f2ba3fe2b27b5722180b0cb7545490b451fe8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f80e68cdb948674c0c68eb346f2ba3fe2b27b5722180b0cb7545490b451fe8e", kill_on_drop: false }`
[INFO] [stdout] 9f80e68cdb948674c0c68eb346f2ba3fe2b27b5722180b0cb7545490b451fe8e
[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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+e9182f195b8505c87c4bd055b9f6e114ccda0981" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f0d6b746500fe7d5da169ce9f938daa79c1ebd8b73fa447befe360cc27c0f552
[INFO] running `Command { std: "docker" "start" "-a" "f0d6b746500fe7d5da169ce9f938daa79c1ebd8b73fa447befe360cc27c0f552", kill_on_drop: false }`
[INFO] [stderr]     Checking single-threaded v0.1.0 (/opt/rustwide/workdir/single-threaded)
[INFO] [stderr]     Checking functional-language-features v0.1.0 (/opt/rustwide/workdir/functional-language-features)
[INFO] [stderr]     Checking minigrep v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking advanced-features v0.1.0 (/opt/rustwide/workdir/advanced-features)
[INFO] [stderr]     Checking fearless-concurrency v0.1.0 (/opt/rustwide/workdir/fearless-concurrency)
[INFO] [stderr]     Checking object-oriented v0.1.0 (/opt/rustwide/workdir/object-oriented)
[INFO] [stderr]     Checking adder v0.1.0 (/opt/rustwide/workdir/adder)
[INFO] [stderr]     Checking smart-pointers v0.1.0 (/opt/rustwide/workdir/smart-pointers)
[INFO] [stderr]     Checking patterns-matching v0.1.0 (/opt/rustwide/workdir/patterns-matching)
[INFO] [stdout] warning: unused import: `std::sync::mpsc`
[INFO] [stdout]  --> fearless-concurrency/src/lib.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::sync::mpsc;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Arc` and `Mutex`
[INFO] [stdout]  --> fearless-concurrency/src/lib.rs:2:17
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::sync::{Arc, Mutex};
[INFO] [stdout]   |                 ^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]  --> fearless-concurrency/src/lib.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::thread;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time::Duration`
[INFO] [stdout]  --> fearless-concurrency/src/lib.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::time::Duration;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::future::Pending`
[INFO] [stdout]  --> object-oriented/src/lib.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::future::Pending;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Color` is never used
[INFO] [stdout]  --> patterns-matching/src/lib.rs:1:6
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum Color {
[INFO] [stdout]   |      ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Message` is never used
[INFO] [stdout]  --> patterns-matching/src/lib.rs:6:6
[INFO] [stdout]   |
[INFO] [stdout] 6 | enum Message {
[INFO] [stdout]   |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Shoe` is never constructed
[INFO] [stdout]  --> functional-language-features/src/lib.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Shoe {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Add` is never used
[INFO] [stdout]   --> advanced-features/src/lib.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 | trait Add<Rhs = Self> {
[INFO] [stdout]    |       ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]   --> advanced-features/src/lib.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct Point {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `box` is never used
[INFO] [stdout]  --> smart-pointers/src/lib.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn r#box() {
[INFO] [stdout]   |    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]  --> adder/src/lib.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Rectangle {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List` is never used
[INFO] [stdout]   --> smart-pointers/src/lib.rs:20:6
[INFO] [stdout]    |
[INFO] [stdout] 20 | enum List {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]   --> smart-pointers/src/lib.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | struct Node {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `can_hold` is never used
[INFO] [stdout]  --> adder/src/lib.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | impl Rectangle {
[INFO] [stdout]   | -------------- method in this implementation
[INFO] [stdout] 8 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `tail` is never used
[INFO] [stdout]   --> smart-pointers/src/lib.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | impl List {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] 33 |     fn tail(&self) -> Option<&RefCell<Rc<List>>> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Message` is never used
[INFO] [stdout]   --> smart-pointers/src/lib.rs:41:6
[INFO] [stdout]    |
[INFO] [stdout] 41 | enum Message {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]   --> adder/src/lib.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct Guess {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 14 |     value: i32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyBox` is never constructed
[INFO] [stdout]   --> smart-pointers/src/lib.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | struct MyBox<T>(T);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `prints_and_returns_10` is never used
[INFO] [stdout]   --> adder/src/lib.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn prints_and_returns_10(a: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> smart-pointers/src/lib.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 50 | impl<T> MyBox<T> {
[INFO] [stdout]    | ---------------- associated function in this implementation
[INFO] [stdout] 51 |     fn new(x: T) -> MyBox<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `shoes_in_size` is never used
[INFO] [stdout]  --> functional-language-features/src/lib.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn shoes_in_size(shoes: Vec<Shoe>, shoe_size: u32) -> Vec<Shoe> {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]  --> functional-language-features/src/lib.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | #[warn(dead_code)]
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CustomSmartPointer` is never constructed
[INFO] [stdout]   --> smart-pointers/src/lib.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 63 | struct CustomSmartPointer {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Counter` is never constructed
[INFO] [stdout]   --> functional-language-features/src/lib.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct Counter {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> smart-pointers/src/lib.rs:87:27
[INFO] [stdout]    |
[INFO] [stdout] 87 |     pub fn new(messenger: &T, max: usize) -> LimitTracker<T> {
[INFO] [stdout]    |                           ^^                 --------------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                           |
[INFO] [stdout]    |                           this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 87 |     pub fn new(messenger: &T, max: usize) -> LimitTracker<'_, T> {
[INFO] [stdout]    |                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> functional-language-features/src/lib.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl Counter {
[INFO] [stdout]    | ------------ associated function in this implementation
[INFO] [stdout] 17 |     #[warn(dead_code)]
[INFO] [stdout] 18 |     fn new() -> Counter {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> functional-language-features/src/lib.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     #[warn(dead_code)]
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0046]: not all trait items implemented, missing: `request_review`, `approve`
[INFO] [stdout]    --> object-oriented/src/lib.rs:132:1
[INFO] [stdout]     |
[INFO] [stdout] 99  |     fn request_review(self: Box<Self>) -> Box<dyn State>;
[INFO] [stdout]     |     ----------------------------------------------------- `request_review` from trait
[INFO] [stdout] 100 |     fn approve(self: Box<Self>) -> Box<dyn State>;
[INFO] [stdout]     |     ---------------------------------------------- `approve` from trait
[INFO] [stdout] ...
[INFO] [stdout] 132 | impl State for Published {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^ missing `request_review`, `approve` in implementation
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0063]: missing field `state` in initializer of `Post`
[INFO] [stdout]    --> object-oriented/src/lib.rs:160:9
[INFO] [stdout]     |
[INFO] [stdout] 160 |         Post {
[INFO] [stdout]     |         ^^^^ missing `state`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `post`
[INFO] [stdout]    --> object-oriented/src/lib.rs:101:27
[INFO] [stdout]     |
[INFO] [stdout] 101 |     fn content<'a>(&self, post: &'a Post) -> &'a str {
[INFO] [stdout]     |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_post`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0422]: cannot find struct, variant or union type `SelectBox` in this scope
[INFO] [stdout]    --> object-oriented/src/lib.rs:177:26
[INFO] [stdout]     |
[INFO] [stdout] 177 |                 Box::new(SelectBox {
[INFO] [stdout]     |                          ^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0422]: cannot find struct, variant or union type `Button` in this scope
[INFO] [stdout]    --> object-oriented/src/lib.rs:186:26
[INFO] [stdout]     |
[INFO] [stdout] 186 |                 Box::new(Button {
[INFO] [stdout]     |                          ^^^^^^ not found in this scope
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]     |
[INFO] [stdout] 168 +     use crate::Button;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0046, E0063.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0046`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `object-oriented` (lib) due to 2 previous errors; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused import: `std::future::Pending`
[INFO] [stdout]  --> object-oriented/src/lib.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::future::Pending;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `box` is never used
[INFO] [stdout]  --> smart-pointers/src/lib.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn r#box() {
[INFO] [stdout]   |    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> smart-pointers/src/lib.rs:21:10
[INFO] [stdout]    |
[INFO] [stdout] 21 |     Cons(i32, RefCell<Rc<List>>),
[INFO] [stdout]    |     ---- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `List` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 21 -     Cons(i32, RefCell<Rc<List>>),
[INFO] [stdout] 21 +     Cons((), RefCell<Rc<List>>),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value` and `children` are never read
[INFO] [stdout]   --> smart-pointers/src/lib.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | struct Node {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 27 |     value: i32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 28 |     parent: RefCell<Weak<Node>>,
[INFO] [stdout] 29 |     children: RefCell<Vec<Rc<Node>>>,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Message` is never used
[INFO] [stdout]   --> smart-pointers/src/lib.rs:41:6
[INFO] [stdout]    |
[INFO] [stdout] 41 | enum Message {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> smart-pointers/src/lib.rs:87:27
[INFO] [stdout]    |
[INFO] [stdout] 87 |     pub fn new(messenger: &T, max: usize) -> LimitTracker<T> {
[INFO] [stdout]    |                           ^^                 --------------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                           |
[INFO] [stdout]    |                           this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 87 |     pub fn new(messenger: &T, max: usize) -> LimitTracker<'_, T> {
[INFO] [stdout]    |                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0046]: not all trait items implemented, missing: `request_review`, `approve`
[INFO] [stdout]    --> object-oriented/src/lib.rs:132:1
[INFO] [stdout]     |
[INFO] [stdout] 99  |     fn request_review(self: Box<Self>) -> Box<dyn State>;
[INFO] [stdout]     |     ----------------------------------------------------- `request_review` from trait
[INFO] [stdout] 100 |     fn approve(self: Box<Self>) -> Box<dyn State>;
[INFO] [stdout]     |     ---------------------------------------------- `approve` from trait
[INFO] [stdout] ...
[INFO] [stdout] 132 | impl State for Published {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^ missing `request_review`, `approve` in implementation
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]   --> adder/src/lib.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct Guess {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 14 |     value: i32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0063]: missing field `state` in initializer of `Post`
[INFO] [stdout]    --> object-oriented/src/lib.rs:160:9
[INFO] [stdout]     |
[INFO] [stdout] 160 |         Post {
[INFO] [stdout]     |         ^^^^ missing `state`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0369]: cannot add `Point` to `Point`
[INFO] [stdout]   --> advanced-features/src/lib.rs:43:34
[INFO] [stdout]    |
[INFO] [stdout] 43 |             Point { x: 1, y: 0 } + Point { x: 2, y: 3 },
[INFO] [stdout]    |             -------------------- ^ -------------------- Point
[INFO] [stdout]    |             |
[INFO] [stdout]    |             Point
[INFO] [stdout]    |
[INFO] [stdout] note: an implementation of `std::ops::Add` might be missing for `Point`
[INFO] [stdout]   --> advanced-features/src/lib.rs:20:1
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct Point {
[INFO] [stdout]    | ^^^^^^^^^^^^ must implement `std::ops::Add`
[INFO] [stdout] note: the trait `std::ops::Add` must be implemented
[INFO] [stdout]   --> /rustc/e9182f195b8505c87c4bd055b9f6e114ccda0981/library/core/src/ops/arith.rs:78:1
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `post`
[INFO] [stdout]    --> object-oriented/src/lib.rs:101:27
[INFO] [stdout]     |
[INFO] [stdout] 101 |     fn content<'a>(&self, post: &'a Post) -> &'a str {
[INFO] [stdout]     |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_post`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0046, E0063, E0422.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0046`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0369`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `advanced-features` (lib test) due to 1 previous error
[INFO] [stdout] warning: variant `Rgb` is never constructed
[INFO] [stdout]  --> patterns-matching/src/lib.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum Color {
[INFO] [stdout]   |      ----- variant in this enum
[INFO] [stdout] 2 |     Rgb(i32, i32, i32),
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `object-oriented` (lib test) due to 4 previous errors; 2 warnings emitted
[INFO] [stdout] warning: variants `Quit`, `Move`, and `Write` are never constructed
[INFO] [stdout]  --> patterns-matching/src/lib.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | enum Message {
[INFO] [stdout]   |      ------- variants in this enum
[INFO] [stdout] 7 |     Quit,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 8 |     Move { x: i32, y: i32 },
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 9 |     Write(String),
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `simulated_expensive_calculation` is never used
[INFO] [stdout]  --> functional-language-features/src/main.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn simulated_expensive_calculation(intensity: u32) -> u32 {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `simulated_expensive_calculation` is never used
[INFO] [stdout]  --> functional-language-features/src/main.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn simulated_expensive_calculation(intensity: u32) -> u32 {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f0d6b746500fe7d5da169ce9f938daa79c1ebd8b73fa447befe360cc27c0f552", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f0d6b746500fe7d5da169ce9f938daa79c1ebd8b73fa447befe360cc27c0f552", kill_on_drop: false }`
[INFO] [stdout] f0d6b746500fe7d5da169ce9f938daa79c1ebd8b73fa447befe360cc27c0f552