[INFO] cloning repository https://github.com/niyiwei/rust-demo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/niyiwei/rust-demo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fniyiwei%2Frust-demo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fniyiwei%2Frust-demo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e91ccfb8f78e6609f3423d9c0a10d18648bfe8d9
[INFO] testing niyiwei/rust-demo against 1.69.0 for beta-1.70-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fniyiwei%2Frust-demo" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/niyiwei/rust-demo on toolchain 1.69.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/niyiwei/rust-demo
[INFO] finished tweaking git repo https://github.com/niyiwei/rust-demo
[INFO] tweaked toml for git repo https://github.com/niyiwei/rust-demo written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/niyiwei/rust-demo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1ee9ac362ecd75f7745df2bd993108d330b88c69e1c8dc129d33d68f787a3f19
[INFO] running `Command { std: "docker" "start" "-a" "1ee9ac362ecd75f7745df2bd993108d330b88c69e1c8dc129d33d68f787a3f19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1ee9ac362ecd75f7745df2bd993108d330b88c69e1c8dc129d33d68f787a3f19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ee9ac362ecd75f7745df2bd993108d330b88c69e1c8dc129d33d68f787a3f19", kill_on_drop: false }`
[INFO] [stdout] 1ee9ac362ecd75f7745df2bd993108d330b88c69e1c8dc129d33d68f787a3f19
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 78205df5716280e4b52ec2733884c98103bb132435c8e904baf5b6434aef9708
[INFO] running `Command { std: "docker" "start" "-a" "78205df5716280e4b52ec2733884c98103bb132435c8e904baf5b6434aef9708", kill_on_drop: false }`
[INFO] [stderr]    Compiling addr v0.1.0 (/opt/rustwide/workdir/addr)
[INFO] [stderr]    Compiling chapter15 v0.1.0 (/opt/rustwide/workdir/chapter15)
[INFO] [stderr]    Compiling chapter-1 v0.1.0 (/opt/rustwide/workdir/chapter-1)
[INFO] [stderr]    Compiling chapter16 v0.1.0 (/opt/rustwide/workdir/chapter16)
[INFO] [stderr]    Compiling chapter17 v0.1.0 (/opt/rustwide/workdir/chapter17)
[INFO] [stderr]    Compiling hello-demo v0.1.0 (/opt/rustwide/workdir/chapter10)
[INFO] [stderr]    Compiling chapter20 v0.1.0 (/opt/rustwide/workdir/chapter20)
[INFO] [stderr]    Compiling chapter18 v0.1.0 (/opt/rustwide/workdir/chapter18)
[INFO] [stdout] warning: unused import: `std::collections::hash_map::Entry::Vacant`
[INFO] [stdout]  --> chapter10/src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::hash_map::Entry::Vacant;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_coordinates` is never used
[INFO] [stdout]   --> chapter18/src/main.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |         fn print_coordinates(&(x, y): &(i32, i32)) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> chapter10/src/main.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 56 |         _ => Some(-1),
[INFO] [stdout]    |         ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `some_number`
[INFO] [stdout]   --> chapter10/src/main.rs:86:9
[INFO] [stdout]    |
[INFO] [stdout] 86 |     let some_number = Some(5);
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_number`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `some_string`
[INFO] [stdout]   --> chapter10/src/main.rs:87:9
[INFO] [stdout]    |
[INFO] [stdout] 87 |     let some_string = Some("a string");
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `none_value`
[INFO] [stdout]   --> chapter10/src/main.rs:89:9
[INFO] [stdout]    |
[INFO] [stdout] 89 |     let none_value: Option<i32> = None;
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_none_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Penny`, `Dine`, and `Quarter` are never constructed
[INFO] [stdout]   --> chapter10/src/main.rs:78:5
[INFO] [stdout]    |
[INFO] [stdout] 77 | enum Coin {
[INFO] [stdout]    |      ---- variants in this enum
[INFO] [stdout] 78 |     Penny,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 79 |     Nickel,
[INFO] [stdout] 80 |     Dine,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 81 |     Quarter,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `chapter6_1_4` is never used
[INFO] [stdout]   --> chapter10/src/main.rs:94:4
[INFO] [stdout]    |
[INFO] [stdout] 94 | fn chapter6_1_4() {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Quit`, `Write`, and `ChangeColor` are never constructed
[INFO] [stdout]    --> chapter10/src/main.rs:101:5
[INFO] [stdout]     |
[INFO] [stdout] 100 | enum Message {
[INFO] [stdout]     |      ------- variants in this enum
[INFO] [stdout] 101 |     Quit,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 102 |     Write(String),
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 103 |     ChangeColor(i32, i32, i32),
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `chapter6_1_3` is never used
[INFO] [stdout]    --> chapter10/src/main.rs:113:4
[INFO] [stdout]     |
[INFO] [stdout] 113 | fn chapter6_1_3() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `chapter6_1_2` is never used
[INFO] [stdout]    --> chapter10/src/main.rs:119:4
[INFO] [stdout]     |
[INFO] [stdout] 119 | fn chapter6_1_2() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `chapter6_1_1` is never used
[INFO] [stdout]    --> chapter10/src/main.rs:125:4
[INFO] [stdout]     |
[INFO] [stdout] 125 | fn chapter6_1_1() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `V4` and `V6` are never constructed
[INFO] [stdout]    --> chapter10/src/main.rs:142:5
[INFO] [stdout]     |
[INFO] [stdout] 141 | enum IpAddrKind3 {
[INFO] [stdout]     |      ----------- variants in this enum
[INFO] [stdout] 142 |     V4(u8, u8, u8, u8),
[INFO] [stdout]     |     ^^
[INFO] [stdout] 143 |     V6(String),
[INFO] [stdout]     |     ^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `IpAddrKind3` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `V4` and `V6` are never constructed
[INFO] [stdout]    --> chapter10/src/main.rs:148:5
[INFO] [stdout]     |
[INFO] [stdout] 147 | enum IpAddrKind2 {
[INFO] [stdout]     |      ----------- variants in this enum
[INFO] [stdout] 148 |     V4(String),
[INFO] [stdout]     |     ^^
[INFO] [stdout] 149 |     V6(String),
[INFO] [stdout]     |     ^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `IpAddrKind2` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `V4` and `V6` are never constructed
[INFO] [stdout]    --> chapter10/src/main.rs:154:5
[INFO] [stdout]     |
[INFO] [stdout] 153 | enum IpAddrKind1 {
[INFO] [stdout]     |      ----------- variants in this enum
[INFO] [stdout] 154 |     V4,
[INFO] [stdout]     |     ^^
[INFO] [stdout] 155 |     V6,
[INFO] [stdout]     |     ^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `IpAddrKind1` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `kind` and `address` are never read
[INFO] [stdout]    --> chapter10/src/main.rs:160:5
[INFO] [stdout]     |
[INFO] [stdout] 159 | struct IpAddr {
[INFO] [stdout]     |        ------ fields in this struct
[INFO] [stdout] 160 |     kind: IpAddrKind1,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 161 |     address: String,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `IpAddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `chapter5_2_2` is never used
[INFO] [stdout]    --> chapter10/src/main.rs:164:4
[INFO] [stdout]     |
[INFO] [stdout] 164 | fn chapter5_2_2() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `chapter5_2_3` is never used
[INFO] [stdout]    --> chapter10/src/main.rs:179:4
[INFO] [stdout]     |
[INFO] [stdout] 179 | fn chapter5_2_3() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `width` and `height` are never read
[INFO] [stdout]    --> chapter10/src/main.rs:190:5
[INFO] [stdout]     |
[INFO] [stdout] 189 | struct Rectangle {
[INFO] [stdout]     |        --------- fields in this struct
[INFO] [stdout] 190 |     width: i32,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 191 |     height: i32,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Rectangle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `chapter5_2_1` is never used
[INFO] [stdout]    --> chapter10/src/main.rs:214:4
[INFO] [stdout]     |
[INFO] [stdout] 214 | fn chapter5_2_1() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `chapter5_1_2` is never used
[INFO] [stdout]    --> chapter10/src/main.rs:224:4
[INFO] [stdout]     |
[INFO] [stdout] 224 | fn chapter5_1_2() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `chapter5_1_1` is never used
[INFO] [stdout]    --> chapter10/src/main.rs:233:4
[INFO] [stdout]     |
[INFO] [stdout] 233 | fn chapter5_1_1() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `area` is never used
[INFO] [stdout]    --> chapter10/src/main.rs:242:4
[INFO] [stdout]     |
[INFO] [stdout] 242 | fn area(rectangle: &Rectangle) -> i32 {
[INFO] [stdout]     |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `call` is never used
[INFO] [stdout]    --> chapter10/src/main.rs:108:8
[INFO] [stdout]     |
[INFO] [stdout] 108 |     fn call(&self) {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `area` is never used
[INFO] [stdout]    --> chapter10/src/main.rs:196:8
[INFO] [stdout]     |
[INFO] [stdout] 196 |     fn area(&self) -> i32 {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `can_hold` is never used
[INFO] [stdout]    --> chapter10/src/main.rs:200:8
[INFO] [stdout]     |
[INFO] [stdout] 200 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> chapter10/src/main.rs:205:8
[INFO] [stdout]     |
[INFO] [stdout] 205 |     fn new(width: i32, height: i32) -> Rectangle {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `age` are never read
[INFO] [stdout]   --> chapter-1/src/main.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     struct Person<'a> {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 27 |         name: &'a str,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 28 |         age: u8,
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Person` has a derived impl for the trait `Debug`, 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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 26 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `Command { std: "docker" "inspect" "78205df5716280e4b52ec2733884c98103bb132435c8e904baf5b6434aef9708", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78205df5716280e4b52ec2733884c98103bb132435c8e904baf5b6434aef9708", kill_on_drop: false }`
[INFO] [stdout] 78205df5716280e4b52ec2733884c98103bb132435c8e904baf5b6434aef9708
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8af2351d2eaafab15b99d47cf9e1b30d6098c801869f5bb0f759906845d5ca51
[INFO] running `Command { std: "docker" "start" "-a" "8af2351d2eaafab15b99d47cf9e1b30d6098c801869f5bb0f759906845d5ca51", kill_on_drop: false }`
[INFO] [stderr]    Compiling chapter-1 v0.1.0 (/opt/rustwide/workdir/chapter-1)
[INFO] [stderr]    Compiling chapter15 v0.1.0 (/opt/rustwide/workdir/chapter15)
[INFO] [stderr]    Compiling chapter17 v0.1.0 (/opt/rustwide/workdir/chapter17)
[INFO] [stderr]    Compiling chapter18 v0.1.0 (/opt/rustwide/workdir/chapter18)
[INFO] [stderr]    Compiling chapter20 v0.1.0 (/opt/rustwide/workdir/chapter20)
[INFO] [stderr]    Compiling hello-demo v0.1.0 (/opt/rustwide/workdir/chapter10)
[INFO] [stderr]    Compiling chapter16 v0.1.0 (/opt/rustwide/workdir/chapter16)
[INFO] [stderr]    Compiling addr v0.1.0 (/opt/rustwide/workdir/addr)
[INFO] [stdout] warning: unused import: `std::collections::hash_map::Entry::Vacant`
[INFO] [stdout]  --> chapter10/src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::hash_map::Entry::Vacant;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]   --> chapter16/src/lib.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |         use std::rc::Rc;
[INFO] [stdout]    |             ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> chapter10/src/main.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 56 |         _ => Some(-1),
[INFO] [stdout]    |         ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `some_number`
[INFO] [stdout]   --> chapter10/src/main.rs:86:9
[INFO] [stdout]    |
[INFO] [stdout] 86 |     let some_number = Some(5);
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_number`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `some_string`
[INFO] [stdout]   --> chapter10/src/main.rs:87:9
[INFO] [stdout]    |
[INFO] [stdout] 87 |     let some_string = Some("a string");
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `none_value`
[INFO] [stdout]   --> chapter10/src/main.rs:89:9
[INFO] [stdout]    |
[INFO] [stdout] 89 |     let none_value: Option<i32> = None;
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_none_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Penny`, `Dine`, and `Quarter` are never constructed
[INFO] [stdout]   --> chapter10/src/main.rs:78:5
[INFO] [stdout]    |
[INFO] [stdout] 77 | enum Coin {
[INFO] [stdout]    |      ---- variants in this enum
[INFO] [stdout] 78 |     Penny,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 79 |     Nickel,
[INFO] [stdout] 80 |     Dine,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 81 |     Quarter,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `chapter6_1_4` is never used
[INFO] [stdout]   --> chapter10/src/main.rs:94:4
[INFO] [stdout]    |
[INFO] [stdout] 94 | fn chapter6_1_4() {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Quit`, `Write`, and `ChangeColor` are never constructed
[INFO] [stdout]    --> chapter10/src/main.rs:101:5
[INFO] [stdout]     |
[INFO] [stdout] 100 | enum Message {
[INFO] [stdout]     |      ------- variants in this enum
[INFO] [stdout] 101 |     Quit,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 102 |     Write(String),
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 103 |     ChangeColor(i32, i32, i32),
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `chapter6_1_3` is never used
[INFO] [stdout]    --> chapter10/src/main.rs:113:4
[INFO] [stdout]     |
[INFO] [stdout] 113 | fn chapter6_1_3() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `chapter6_1_2` is never used
[INFO] [stdout]    --> chapter10/src/main.rs:119:4
[INFO] [stdout]     |
[INFO] [stdout] 119 | fn chapter6_1_2() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `chapter6_1_1` is never used
[INFO] [stdout]    --> chapter10/src/main.rs:125:4
[INFO] [stdout]     |
[INFO] [stdout] 125 | fn chapter6_1_1() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `V4` and `V6` are never constructed
[INFO] [stdout]    --> chapter10/src/main.rs:142:5
[INFO] [stdout]     |
[INFO] [stdout] 141 | enum IpAddrKind3 {
[INFO] [stdout]     |      ----------- variants in this enum
[INFO] [stdout] 142 |     V4(u8, u8, u8, u8),
[INFO] [stdout]     |     ^^
[INFO] [stdout] 143 |     V6(String),
[INFO] [stdout]     |     ^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `IpAddrKind3` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `V4` and `V6` are never constructed
[INFO] [stdout]    --> chapter10/src/main.rs:148:5
[INFO] [stdout]     |
[INFO] [stdout] 147 | enum IpAddrKind2 {
[INFO] [stdout]     |      ----------- variants in this enum
[INFO] [stdout] 148 |     V4(String),
[INFO] [stdout]     |     ^^
[INFO] [stdout] 149 |     V6(String),
[INFO] [stdout]     |     ^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `IpAddrKind2` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `V4` and `V6` are never constructed
[INFO] [stdout]    --> chapter10/src/main.rs:154:5
[INFO] [stdout]     |
[INFO] [stdout] 153 | enum IpAddrKind1 {
[INFO] [stdout]     |      ----------- variants in this enum
[INFO] [stdout] 154 |     V4,
[INFO] [stdout]     |     ^^
[INFO] [stdout] 155 |     V6,
[INFO] [stdout]     |     ^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `IpAddrKind1` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `kind` and `address` are never read
[INFO] [stdout]    --> chapter10/src/main.rs:160:5
[INFO] [stdout]     |
[INFO] [stdout] 159 | struct IpAddr {
[INFO] [stdout]     |        ------ fields in this struct
[INFO] [stdout] 160 |     kind: IpAddrKind1,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 161 |     address: String,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `IpAddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `chapter5_2_2` is never used
[INFO] [stdout]    --> chapter10/src/main.rs:164:4
[INFO] [stdout]     |
[INFO] [stdout] 164 | fn chapter5_2_2() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `chapter5_2_3` is never used
[INFO] [stdout]    --> chapter10/src/main.rs:179:4
[INFO] [stdout]     |
[INFO] [stdout] 179 | fn chapter5_2_3() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `width` and `height` are never read
[INFO] [stdout]    --> chapter10/src/main.rs:190:5
[INFO] [stdout]     |
[INFO] [stdout] 189 | struct Rectangle {
[INFO] [stdout]     |        --------- fields in this struct
[INFO] [stdout] 190 |     width: i32,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 191 |     height: i32,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Rectangle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `chapter5_2_1` is never used
[INFO] [stdout]    --> chapter10/src/main.rs:214:4
[INFO] [stdout]     |
[INFO] [stdout] 214 | fn chapter5_2_1() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `chapter5_1_2` is never used
[INFO] [stdout]    --> chapter10/src/main.rs:224:4
[INFO] [stdout]     |
[INFO] [stdout] 224 | fn chapter5_1_2() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `chapter5_1_1` is never used
[INFO] [stdout]    --> chapter10/src/main.rs:233:4
[INFO] [stdout]     |
[INFO] [stdout] 233 | fn chapter5_1_1() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `area` is never used
[INFO] [stdout]    --> chapter10/src/main.rs:242:4
[INFO] [stdout]     |
[INFO] [stdout] 242 | fn area(rectangle: &Rectangle) -> i32 {
[INFO] [stdout]     |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `call` is never used
[INFO] [stdout]    --> chapter10/src/main.rs:108:8
[INFO] [stdout]     |
[INFO] [stdout] 108 |     fn call(&self) {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `area` is never used
[INFO] [stdout]    --> chapter10/src/main.rs:196:8
[INFO] [stdout]     |
[INFO] [stdout] 196 |     fn area(&self) -> i32 {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `can_hold` is never used
[INFO] [stdout]    --> chapter10/src/main.rs:200:8
[INFO] [stdout]     |
[INFO] [stdout] 200 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> chapter10/src/main.rs:205:8
[INFO] [stdout]     |
[INFO] [stdout] 205 |     fn new(width: i32, height: i32) -> Rectangle {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Quit`, `Move`, and `Write` are never constructed
[INFO] [stdout]    --> chapter18/src/main.rs:149:17
[INFO] [stdout]     |
[INFO] [stdout] 148 |             enum Message {
[INFO] [stdout]     |                  ------- variants in this enum
[INFO] [stdout] 149 |                 Quit,
[INFO] [stdout]     |                 ^^^^
[INFO] [stdout] 150 |                 Move { x: i32, y: i32 },
[INFO] [stdout]     |                 ^^^^
[INFO] [stdout] 151 |                 Write(String),
[INFO] [stdout]     |                 ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 26 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.54s
[INFO] running `Command { std: "docker" "inspect" "8af2351d2eaafab15b99d47cf9e1b30d6098c801869f5bb0f759906845d5ca51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8af2351d2eaafab15b99d47cf9e1b30d6098c801869f5bb0f759906845d5ca51", kill_on_drop: false }`
[INFO] [stdout] 8af2351d2eaafab15b99d47cf9e1b30d6098c801869f5bb0f759906845d5ca51
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e124a50032c3a98228b8ba95eeca5b0ad54221675e2c9a50df31093fcf737ccc
[INFO] running `Command { std: "docker" "start" "-a" "e124a50032c3a98228b8ba95eeca5b0ad54221675e2c9a50df31093fcf737ccc", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `std::rc::Rc`
[INFO] [stderr]   --> chapter16/src/lib.rs:39:13
[INFO] [stderr]    |
[INFO] [stderr] 39 |         use std::rc::Rc;
[INFO] [stderr]    |             ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `chapter16` (lib test) generated 1 warning (run `cargo fix --lib -p chapter16 --tests` to apply 1 suggestion)
[INFO] [stderr] warning: variants `Quit`, `Move`, and `Write` are never constructed
[INFO] [stderr]    --> chapter18/src/main.rs:149:17
[INFO] [stderr]     |
[INFO] [stderr] 148 |             enum Message {
[INFO] [stderr]     |                  ------- variants in this enum
[INFO] [stderr] 149 |                 Quit,
[INFO] [stderr]     |                 ^^^^
[INFO] [stderr] 150 |                 Move { x: i32, y: i32 },
[INFO] [stderr]     |                 ^^^^
[INFO] [stderr] 151 |                 Write(String),
[INFO] [stderr]     |                 ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::hash_map::Entry::Vacant`
[INFO] [stderr]  --> chapter10/src/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::collections::hash_map::Entry::Vacant;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]   --> chapter10/src/main.rs:56:9
[INFO] [stderr]    |
[INFO] [stderr] 56 |         _ => Some(-1),
[INFO] [stderr]    |         ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `some_number`
[INFO] [stderr]   --> chapter10/src/main.rs:86:9
[INFO] [stderr]    |
[INFO] [stderr] 86 |     let some_number = Some(5);
[INFO] [stderr]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_number`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `some_string`
[INFO] [stderr]   --> chapter10/src/main.rs:87:9
[INFO] [stderr]    |
[INFO] [stderr] 87 |     let some_string = Some("a string");
[INFO] [stderr]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_string`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `none_value`
[INFO] [stderr]   --> chapter10/src/main.rs:89:9
[INFO] [stderr]    |
[INFO] [stderr] 89 |     let none_value: Option<i32> = None;
[INFO] [stderr]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_none_value`
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Penny`, `Dine`, and `Quarter` are never constructed
[INFO] [stderr]   --> chapter10/src/main.rs:78:5
[INFO] [stderr]    |
[INFO] [stderr] 77 | enum Coin {
[INFO] [stderr]    |      ---- variants in this enum
[INFO] [stderr] 78 |     Penny,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 79 |     Nickel,
[INFO] [stderr] 80 |     Dine,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 81 |     Quarter,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `chapter6_1_4` is never used
[INFO] [stderr]   --> chapter10/src/main.rs:94:4
[INFO] [stderr]    |
[INFO] [stderr] 94 | fn chapter6_1_4() {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Quit`, `Write`, and `ChangeColor` are never constructed
[INFO] [stderr]    --> chapter10/src/main.rs:101:5
[INFO] [stderr]     |
[INFO] [stderr] 100 | enum Message {
[INFO] [stderr]     |      ------- variants in this enum
[INFO] [stderr] 101 |     Quit,
[INFO] [stderr]     |     ^^^^
[INFO] [stderr] 102 |     Write(String),
[INFO] [stderr]     |     ^^^^^
[INFO] [stderr] 103 |     ChangeColor(i32, i32, i32),
[INFO] [stderr]     |     ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: function `chapter6_1_3` is never used
[INFO] [stderr]    --> chapter10/src/main.rs:113:4
[INFO] [stderr]     |
[INFO] [stderr] 113 | fn chapter6_1_3() {
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `chapter6_1_2` is never used
[INFO] [stderr]    --> chapter10/src/main.rs:119:4
[INFO] [stderr]     |
[INFO] [stderr] 119 | fn chapter6_1_2() {
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `chapter6_1_1` is never used
[INFO] [stderr]    --> chapter10/src/main.rs:125:4
[INFO] [stderr]     |
[INFO] [stderr] 125 | fn chapter6_1_1() {
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variants `V4` and `V6` are never constructed
[INFO] [stderr]    --> chapter10/src/main.rs:142:5
[INFO] [stderr]     |
[INFO] [stderr] 141 | enum IpAddrKind3 {
[INFO] [stderr]     |      ----------- variants in this enum
[INFO] [stderr] 142 |     V4(u8, u8, u8, u8),
[INFO] [stderr]     |     ^^
[INFO] [stderr] 143 |     V6(String),
[INFO] [stderr]     |     ^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `IpAddrKind3` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: variants `V4` and `V6` are never constructed
[INFO] [stderr]    --> chapter10/src/main.rs:148:5
[INFO] [stderr]     |
[INFO] [stderr] 147 | enum IpAddrKind2 {
[INFO] [stderr]     |      ----------- variants in this enum
[INFO] [stderr] 148 |     V4(String),
[INFO] [stderr]     |     ^^
[INFO] [stderr] 149 |     V6(String),
[INFO] [stderr]     |     ^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `IpAddrKind2` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: variants `V4` and `V6` are never constructed
[INFO] [stderr]    --> chapter10/src/main.rs:154:5
[INFO] [stderr]     |
[INFO] [stderr] 153 | enum IpAddrKind1 {
[INFO] [stderr]     |      ----------- variants in this enum
[INFO] [stderr] 154 |     V4,
[INFO] [stderr]     |     ^^
[INFO] [stderr] 155 |     V6,
[INFO] [stderr]     |     ^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `IpAddrKind1` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: fields `kind` and `address` are never read
[INFO] [stderr]    --> chapter10/src/main.rs:160:5
[INFO] [stderr]     |
[INFO] [stderr] 159 | struct IpAddr {
[INFO] [stderr]     |        ------ fields in this struct
[INFO] [stderr] 160 |     kind: IpAddrKind1,
[INFO] [stderr]     |     ^^^^
[INFO] [stderr] 161 |     address: String,
[INFO] [stderr]     |     ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `IpAddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: function `chapter5_2_2` is never used
[INFO] [stderr]    --> chapter10/src/main.rs:164:4
[INFO] [stderr]     |
[INFO] [stderr] 164 | fn chapter5_2_2() {
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `chapter5_2_3` is never used
[INFO] [stderr]    --> chapter10/src/main.rs:179:4
[INFO] [stderr]     |
[INFO] [stderr] 179 | fn chapter5_2_3() {
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: fields `width` and `height` are never read
[INFO] [stderr]    --> chapter10/src/main.rs:190:5
[INFO] [stderr]     |
[INFO] [stderr] 189 | struct Rectangle {
[INFO] [stderr]     |        --------- fields in this struct
[INFO] [stderr] 190 |     width: i32,
[INFO] [stderr]     |     ^^^^^
[INFO] [stderr] 191 |     height: i32,
[INFO] [stderr]     |     ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `Rectangle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: function `chapter5_2_1` is never used
[INFO] [stderr]    --> chapter10/src/main.rs:214:4
[INFO] [stderr]     |
[INFO] [stderr] 214 | fn chapter5_2_1() {
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `chapter5_1_2` is never used
[INFO] [stderr]    --> chapter10/src/main.rs:224:4
[INFO] [stderr]     |
[INFO] [stderr] 224 | fn chapter5_1_2() {
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `chapter5_1_1` is never used
[INFO] [stderr]    --> chapter10/src/main.rs:233:4
[INFO] [stderr]     |
[INFO] [stderr] 233 | fn chapter5_1_1() {
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `area` is never used
[INFO] [stderr]    --> chapter10/src/main.rs:242:4
[INFO] [stderr]     |
[INFO] [stderr] 242 | fn area(rectangle: &Rectangle) -> i32 {
[INFO] [stderr]     |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `call` is never used
[INFO] [stderr]    --> chapter10/src/main.rs:108:8
[INFO] [stderr]     |
[INFO] [stderr] 108 |     fn call(&self) {
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `area` is never used
[INFO] [stderr]    --> chapter10/src/main.rs:196:8
[INFO] [stderr]     |
[INFO] [stderr] 196 |     fn area(&self) -> i32 {
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `can_hold` is never used
[INFO] [stderr]    --> chapter10/src/main.rs:200:8
[INFO] [stderr]     |
[INFO] [stderr] 200 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stderr]     |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]    --> chapter10/src/main.rs:205:8
[INFO] [stderr]     |
[INFO] [stderr] 205 |     fn new(width: i32, height: i32) -> Rectangle {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `chapter18` (bin "chapter18" test) generated 1 warning
[INFO] [stderr] warning: `hello-demo` (bin "hello-demo" test) generated 26 warnings (run `cargo fix --bin "hello-demo" --tests` to apply 4 suggestions)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/addr-e7076a01356f5027)
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test tests::exploration ... ok
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] test tests::greater_than_100 - should panic ... FAILED
[INFO] [stdout] test tests::it_works_result ... ok
[INFO] [stdout] test tests::larger_can_hold_smaller ... ok
[INFO] [stdout] test tests::smaller_cannot_hold_larger ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- tests::greater_than_100 stdout ----
[INFO] [stdout] note: test did not panic as expected
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     tests::greater_than_100
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 5 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `-p addr --lib`
[INFO] running `Command { std: "docker" "inspect" "e124a50032c3a98228b8ba95eeca5b0ad54221675e2c9a50df31093fcf737ccc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e124a50032c3a98228b8ba95eeca5b0ad54221675e2c9a50df31093fcf737ccc", kill_on_drop: false }`
[INFO] [stdout] e124a50032c3a98228b8ba95eeca5b0ad54221675e2c9a50df31093fcf737ccc
