[INFO] cloning repository https://github.com/kigawas/examples-in-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kigawas/examples-in-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkigawas%2Fexamples-in-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkigawas%2Fexamples-in-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bc0ce30ca9ac369134ece5875ff23d60edc51da7
[INFO] testing kigawas/examples-in-rust against try#0abe69e6c16114311cc2700e972492e64d69c28f for pr-154065-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkigawas%2Fexamples-in-rust" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/kigawas/examples-in-rust
[INFO] finished tweaking git repo https://github.com/kigawas/examples-in-rust
[INFO] tweaked toml for git repo https://github.com/kigawas/examples-in-rust written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kigawas/examples-in-rust on toolchain 0abe69e6c16114311cc2700e972492e64d69c28f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/kigawas/examples-in-rust 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" "+0abe69e6c16114311cc2700e972492e64d69c28f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b27629a27380f1693f4cdcbc54af621ed576e24b0b20ebc80c6cf3ae090816c6
[INFO] running `Command { std: "docker" "start" "-a" "b27629a27380f1693f4cdcbc54af621ed576e24b0b20ebc80c6cf3ae090816c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b27629a27380f1693f4cdcbc54af621ed576e24b0b20ebc80c6cf3ae090816c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b27629a27380f1693f4cdcbc54af621ed576e24b0b20ebc80c6cf3ae090816c6", kill_on_drop: false }`
[INFO] [stdout] b27629a27380f1693f4cdcbc54af621ed576e24b0b20ebc80c6cf3ae090816c6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 359eb601eba00fca9dc16c3b075dbc79dfcff47a56af8cc8e1bf36d761ecf699
[INFO] running `Command { std: "docker" "start" "-a" "359eb601eba00fca9dc16c3b075dbc79dfcff47a56af8cc8e1bf36d761ecf699", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]    Compiling examples-in-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]    --> src/chap14/mod.rs:306:28
[INFO] [stdout]     |
[INFO] [stdout] 306 |         fn contains(&self, &A, &B) -> bool; // Explicitly requires `A` and `B`.
[INFO] [stdout]     |                            ^^ help: try naming the parameter or explicitly ignoring it: `_: &A`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2018/trait-fn-parameters.html>
[INFO] [stdout]     = note: `#[warn(anonymous_parameters)]` (part of `#[warn(rust_2018_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]    --> src/chap14/mod.rs:306:32
[INFO] [stdout]     |
[INFO] [stdout] 306 |         fn contains(&self, &A, &B) -> bool; // Explicitly requires `A` and `B`.
[INFO] [stdout]     |                                ^^ help: try naming the parameter or explicitly ignoring it: `_: &B`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2018/trait-fn-parameters.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]    --> src/chap14/mod.rs:364:28
[INFO] [stdout]     |
[INFO] [stdout] 364 |         fn contains(&self, &Self::A, &Self::B) -> bool;
[INFO] [stdout]     |                            ^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: &Self::A`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2018/trait-fn-parameters.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]    --> src/chap14/mod.rs:364:38
[INFO] [stdout]     |
[INFO] [stdout] 364 |         fn contains(&self, &Self::A, &Self::B) -> bool;
[INFO] [stdout]     |                                      ^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: &Self::B`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2018/trait-fn-parameters.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused label
[INFO] [stdout]   --> src/chap8/mod.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |         'inner: loop {
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_labels)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/chap8/mod.rs:185:11
[INFO] [stdout]     |
[INFO] [stdout] 185 |         13...19 => println!("A teen"),
[INFO] [stdout]     |           ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/chap8/mod.rs:362:14
[INFO] [stdout]     |
[INFO] [stdout] 362 |         n @ 1...12 => println!("I'm a child of age {:?}", n),
[INFO] [stdout]     |              ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/chap8/mod.rs:363:15
[INFO] [stdout]     |
[INFO] [stdout] 363 |         n @ 13...19 => println!("I'm a teen of age {:?}", n),
[INFO] [stdout]     |               ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/chap1/mod.rs:87:22
[INFO] [stdout]    |
[INFO] [stdout] 87 |     struct Structure(i32);
[INFO] [stdout]    |            --------- ^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `Structure` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/chap1/mod.rs:92:17
[INFO] [stdout]    |
[INFO] [stdout] 92 |     struct Deep(Structure);
[INFO] [stdout]    |            ---- ^^^^^^^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `Deep` 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 `name` and `age` are never read
[INFO] [stdout]    --> src/chap1/mod.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 111 |     struct Person<'a> {
[INFO] [stdout]     |            ------ fields in this struct
[INFO] [stdout] 112 |         name: &'a str,
[INFO] [stdout]     |         ^^^^
[INFO] [stdout] 113 |         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] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/chap15/mod.rs:453:25
[INFO] [stdout]     |
[INFO] [stdout] 453 |     struct Borrowed<'a>(&'a i32);
[INFO] [stdout]     |            --------     ^^^^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing this field
[INFO] [stdout]     = note: `Borrowed` 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 `x` and `y` are never read
[INFO] [stdout]    --> src/chap15/mod.rs:458:9
[INFO] [stdout]     |
[INFO] [stdout] 457 |     struct NamedBorrowed<'a> {
[INFO] [stdout]     |            ------------- fields in this struct
[INFO] [stdout] 458 |         x: &'a i32,
[INFO] [stdout]     |         ^
[INFO] [stdout] 459 |         y: &'a i32,
[INFO] [stdout]     |         ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `NamedBorrowed` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/chap15/mod.rs:465:13
[INFO] [stdout]     |
[INFO] [stdout] 465 |         Num(i32),
[INFO] [stdout]     |         --- ^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Either` 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] 465 -         Num(i32),
[INFO] [stdout] 465 +         Num(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/chap15/mod.rs:466:13
[INFO] [stdout]     |
[INFO] [stdout] 466 |         Ref(&'a i32),
[INFO] [stdout]     |         --- ^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Either` 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] 466 -         Ref(&'a i32),
[INFO] [stdout] 466 +         Ref(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/chap15/mod.rs:487:27
[INFO] [stdout]     |
[INFO] [stdout] 487 |     struct Ref<'a, T: 'a>(&'a T);
[INFO] [stdout]     |            ---            ^^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing this field
[INFO] [stdout]     = note: `Ref` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/chap16/mod.rs:94:20
[INFO] [stdout]    |
[INFO] [stdout] 94 |     struct Seconds(i32);
[INFO] [stdout]    |            ------- ^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `age` are never read
[INFO] [stdout]  --> src/chap3/mod.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     struct Person<'pl> {
[INFO] [stdout]   |            ------ fields in this struct
[INFO] [stdout] 4 |         // pl for person lifetime
[INFO] [stdout] 5 |         name: &'pl str,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout] 6 |         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] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `age` are never read
[INFO] [stdout]   --> src/chap3/mod.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     struct Child {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 11 |         // remove lifetime annotation
[INFO] [stdout] 12 |         name: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 13 |         age: u8,
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Child` 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 `father` and `kid` are never read
[INFO] [stdout]   --> src/chap3/mod.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     struct Family<'fl> {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 18 |         // fl for family lifetime
[INFO] [stdout] 19 |         father: Person<'fl>,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 20 |         kid: Child,
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Family` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]  --> src/chap6/mod.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     struct Number {
[INFO] [stdout]   |            ------ field in this struct
[INFO] [stdout] 6 |         value: i32,
[INFO] [stdout]   |         ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Number` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.73s
[INFO] running `Command { std: "docker" "inspect" "359eb601eba00fca9dc16c3b075dbc79dfcff47a56af8cc8e1bf36d761ecf699", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "359eb601eba00fca9dc16c3b075dbc79dfcff47a56af8cc8e1bf36d761ecf699", kill_on_drop: false }`
[INFO] [stdout] 359eb601eba00fca9dc16c3b075dbc79dfcff47a56af8cc8e1bf36d761ecf699
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 56c12d6e554950d4a0f42604b6a462fb1142263a40ed061b541c6a800b535614
[INFO] running `Command { std: "docker" "start" "-a" "56c12d6e554950d4a0f42604b6a462fb1142263a40ed061b541c6a800b535614", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]    Compiling examples-in-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]    --> src/chap14/mod.rs:306:28
[INFO] [stdout]     |
[INFO] [stdout] 306 |         fn contains(&self, &A, &B) -> bool; // Explicitly requires `A` and `B`.
[INFO] [stdout]     |                            ^^ help: try naming the parameter or explicitly ignoring it: `_: &A`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2018/trait-fn-parameters.html>
[INFO] [stdout]     = note: `#[warn(anonymous_parameters)]` (part of `#[warn(rust_2018_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]    --> src/chap14/mod.rs:306:32
[INFO] [stdout]     |
[INFO] [stdout] 306 |         fn contains(&self, &A, &B) -> bool; // Explicitly requires `A` and `B`.
[INFO] [stdout]     |                                ^^ help: try naming the parameter or explicitly ignoring it: `_: &B`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2018/trait-fn-parameters.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]    --> src/chap14/mod.rs:364:28
[INFO] [stdout]     |
[INFO] [stdout] 364 |         fn contains(&self, &Self::A, &Self::B) -> bool;
[INFO] [stdout]     |                            ^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: &Self::A`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2018/trait-fn-parameters.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]    --> src/chap14/mod.rs:364:38
[INFO] [stdout]     |
[INFO] [stdout] 364 |         fn contains(&self, &Self::A, &Self::B) -> bool;
[INFO] [stdout]     |                                      ^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: &Self::B`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2018/trait-fn-parameters.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused label
[INFO] [stdout]   --> src/chap8/mod.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |         'inner: loop {
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_labels)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/chap8/mod.rs:185:11
[INFO] [stdout]     |
[INFO] [stdout] 185 |         13...19 => println!("A teen"),
[INFO] [stdout]     |           ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/chap8/mod.rs:362:14
[INFO] [stdout]     |
[INFO] [stdout] 362 |         n @ 1...12 => println!("I'm a child of age {:?}", n),
[INFO] [stdout]     |              ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/chap8/mod.rs:363:15
[INFO] [stdout]     |
[INFO] [stdout] 363 |         n @ 13...19 => println!("I'm a teen of age {:?}", n),
[INFO] [stdout]     |               ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/chap1/mod.rs:87:22
[INFO] [stdout]    |
[INFO] [stdout] 87 |     struct Structure(i32);
[INFO] [stdout]    |            --------- ^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `Structure` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/chap1/mod.rs:92:17
[INFO] [stdout]    |
[INFO] [stdout] 92 |     struct Deep(Structure);
[INFO] [stdout]    |            ---- ^^^^^^^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `Deep` 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 `name` and `age` are never read
[INFO] [stdout]    --> src/chap1/mod.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 111 |     struct Person<'a> {
[INFO] [stdout]     |            ------ fields in this struct
[INFO] [stdout] 112 |         name: &'a str,
[INFO] [stdout]     |         ^^^^
[INFO] [stdout] 113 |         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] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/chap15/mod.rs:453:25
[INFO] [stdout]     |
[INFO] [stdout] 453 |     struct Borrowed<'a>(&'a i32);
[INFO] [stdout]     |            --------     ^^^^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing this field
[INFO] [stdout]     = note: `Borrowed` 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 `x` and `y` are never read
[INFO] [stdout]    --> src/chap15/mod.rs:458:9
[INFO] [stdout]     |
[INFO] [stdout] 457 |     struct NamedBorrowed<'a> {
[INFO] [stdout]     |            ------------- fields in this struct
[INFO] [stdout] 458 |         x: &'a i32,
[INFO] [stdout]     |         ^
[INFO] [stdout] 459 |         y: &'a i32,
[INFO] [stdout]     |         ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `NamedBorrowed` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/chap15/mod.rs:465:13
[INFO] [stdout]     |
[INFO] [stdout] 465 |         Num(i32),
[INFO] [stdout]     |         --- ^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Either` 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] 465 -         Num(i32),
[INFO] [stdout] 465 +         Num(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/chap15/mod.rs:466:13
[INFO] [stdout]     |
[INFO] [stdout] 466 |         Ref(&'a i32),
[INFO] [stdout]     |         --- ^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Either` 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] 466 -         Ref(&'a i32),
[INFO] [stdout] 466 +         Ref(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/chap15/mod.rs:487:27
[INFO] [stdout]     |
[INFO] [stdout] 487 |     struct Ref<'a, T: 'a>(&'a T);
[INFO] [stdout]     |            ---            ^^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing this field
[INFO] [stdout]     = note: `Ref` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/chap16/mod.rs:94:20
[INFO] [stdout]    |
[INFO] [stdout] 94 |     struct Seconds(i32);
[INFO] [stdout]    |            ------- ^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `age` are never read
[INFO] [stdout]  --> src/chap3/mod.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     struct Person<'pl> {
[INFO] [stdout]   |            ------ fields in this struct
[INFO] [stdout] 4 |         // pl for person lifetime
[INFO] [stdout] 5 |         name: &'pl str,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout] 6 |         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] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `age` are never read
[INFO] [stdout]   --> src/chap3/mod.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     struct Child {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 11 |         // remove lifetime annotation
[INFO] [stdout] 12 |         name: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 13 |         age: u8,
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Child` 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 `father` and `kid` are never read
[INFO] [stdout]   --> src/chap3/mod.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     struct Family<'fl> {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 18 |         // fl for family lifetime
[INFO] [stdout] 19 |         father: Person<'fl>,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 20 |         kid: Child,
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Family` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]  --> src/chap6/mod.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     struct Number {
[INFO] [stdout]   |            ------ field in this struct
[INFO] [stdout] 6 |         value: i32,
[INFO] [stdout]   |         ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Number` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `Command { std: "docker" "inspect" "56c12d6e554950d4a0f42604b6a462fb1142263a40ed061b541c6a800b535614", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56c12d6e554950d4a0f42604b6a462fb1142263a40ed061b541c6a800b535614", kill_on_drop: false }`
[INFO] [stdout] 56c12d6e554950d4a0f42604b6a462fb1142263a40ed061b541c6a800b535614
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c358f36d43492c461af04dce90742f6030d72ffa9181e60be63f6b3112c201ae
[INFO] running `Command { std: "docker" "start" "-a" "c358f36d43492c461af04dce90742f6030d72ffa9181e60be63f6b3112c201ae", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stderr]    --> src/chap14/mod.rs:306:28
[INFO] [stderr]     |
[INFO] [stderr] 306 |         fn contains(&self, &A, &B) -> bool; // Explicitly requires `A` and `B`.
[INFO] [stderr]     |                            ^^ help: try naming the parameter or explicitly ignoring it: `_: &A`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2018/trait-fn-parameters.html>
[INFO] [stderr]     = note: `#[warn(anonymous_parameters)]` (part of `#[warn(rust_2018_compatibility)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stderr]    --> src/chap14/mod.rs:306:32
[INFO] [stderr]     |
[INFO] [stderr] 306 |         fn contains(&self, &A, &B) -> bool; // Explicitly requires `A` and `B`.
[INFO] [stderr]     |                                ^^ help: try naming the parameter or explicitly ignoring it: `_: &B`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2018/trait-fn-parameters.html>
[INFO] [stderr] 
[INFO] [stderr] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stderr]    --> src/chap14/mod.rs:364:28
[INFO] [stderr]     |
[INFO] [stderr] 364 |         fn contains(&self, &Self::A, &Self::B) -> bool;
[INFO] [stderr]     |                            ^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: &Self::A`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2018/trait-fn-parameters.html>
[INFO] [stderr] 
[INFO] [stderr] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stderr]    --> src/chap14/mod.rs:364:38
[INFO] [stderr]     |
[INFO] [stderr] 364 |         fn contains(&self, &Self::A, &Self::B) -> bool;
[INFO] [stderr]     |                                      ^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: &Self::B`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2018/trait-fn-parameters.html>
[INFO] [stderr] 
[INFO] [stderr] warning: unused label
[INFO] [stderr]   --> src/chap8/mod.rs:62:9
[INFO] [stderr]    |
[INFO] [stderr] 62 |         'inner: loop {
[INFO] [stderr]    |         ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_labels)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/chap8/mod.rs:185:11
[INFO] [stderr]     |
[INFO] [stderr] 185 |         13...19 => println!("A teen"),
[INFO] [stderr]     |           ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/chap8/mod.rs:362:14
[INFO] [stderr]     |
[INFO] [stderr] 362 |         n @ 1...12 => println!("I'm a child of age {:?}", n),
[INFO] [stderr]     |              ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/chap8/mod.rs:363:15
[INFO] [stderr]     |
[INFO] [stderr] 363 |         n @ 13...19 => println!("I'm a teen of age {:?}", n),
[INFO] [stderr]     |               ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]   --> src/chap1/mod.rs:87:22
[INFO] [stderr]    |
[INFO] [stderr] 87 |     struct Structure(i32);
[INFO] [stderr]    |            --------- ^^^
[INFO] [stderr]    |            |
[INFO] [stderr]    |            field in this struct
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider removing this field
[INFO] [stderr]    = note: `Structure` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]   --> src/chap1/mod.rs:92:17
[INFO] [stderr]    |
[INFO] [stderr] 92 |     struct Deep(Structure);
[INFO] [stderr]    |            ---- ^^^^^^^^^
[INFO] [stderr]    |            |
[INFO] [stderr]    |            field in this struct
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider removing this field
[INFO] [stderr]    = note: `Deep` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: fields `name` and `age` are never read
[INFO] [stderr]    --> src/chap1/mod.rs:112:9
[INFO] [stderr]     |
[INFO] [stderr] 111 |     struct Person<'a> {
[INFO] [stderr]     |            ------ fields in this struct
[INFO] [stderr] 112 |         name: &'a str,
[INFO] [stderr]     |         ^^^^
[INFO] [stderr] 113 |         age: u8,
[INFO] [stderr]     |         ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `Person` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]    --> src/chap15/mod.rs:453:25
[INFO] [stderr]     |
[INFO] [stderr] 453 |     struct Borrowed<'a>(&'a i32);
[INFO] [stderr]     |            --------     ^^^^^^^
[INFO] [stderr]     |            |
[INFO] [stderr]     |            field in this struct
[INFO] [stderr]     |
[INFO] [stderr]     = help: consider removing this field
[INFO] [stderr]     = note: `Borrowed` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: fields `x` and `y` are never read
[INFO] [stderr]    --> src/chap15/mod.rs:458:9
[INFO] [stderr]     |
[INFO] [stderr] 457 |     struct NamedBorrowed<'a> {
[INFO] [stderr]     |            ------------- fields in this struct
[INFO] [stderr] 458 |         x: &'a i32,
[INFO] [stderr]     |         ^
[INFO] [stderr] 459 |         y: &'a i32,
[INFO] [stderr]     |         ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `NamedBorrowed` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]    --> src/chap15/mod.rs:465:13
[INFO] [stderr]     |
[INFO] [stderr] 465 |         Num(i32),
[INFO] [stderr]     |         --- ^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         field in this variant
[INFO] [stderr]     |
[INFO] [stderr]     = note: `Either` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]     |
[INFO] [stderr] 465 -         Num(i32),
[INFO] [stderr] 465 +         Num(()),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]    --> src/chap15/mod.rs:466:13
[INFO] [stderr]     |
[INFO] [stderr] 466 |         Ref(&'a i32),
[INFO] [stderr]     |         --- ^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         field in this variant
[INFO] [stderr]     |
[INFO] [stderr]     = note: `Either` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]     |
[INFO] [stderr] 466 -         Ref(&'a i32),
[INFO] [stderr] 466 +         Ref(()),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]    --> src/chap15/mod.rs:487:27
[INFO] [stderr]     |
[INFO] [stderr] 487 |     struct Ref<'a, T: 'a>(&'a T);
[INFO] [stderr]     |            ---            ^^^^^
[INFO] [stderr]     |            |
[INFO] [stderr]     |            field in this struct
[INFO] [stderr]     |
[INFO] [stderr]     = help: consider removing this field
[INFO] [stderr]     = note: `Ref` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]   --> src/chap16/mod.rs:94:20
[INFO] [stderr]    |
[INFO] [stderr] 94 |     struct Seconds(i32);
[INFO] [stderr]    |            ------- ^^^
[INFO] [stderr]    |            |
[INFO] [stderr]    |            field in this struct
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider removing this field
[INFO] [stderr] 
[INFO] [stderr] warning: fields `name` and `age` are never read
[INFO] [stderr]  --> src/chap3/mod.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 3 |     struct Person<'pl> {
[INFO] [stderr]   |            ------ fields in this struct
[INFO] [stderr] 4 |         // pl for person lifetime
[INFO] [stderr] 5 |         name: &'pl str,
[INFO] [stderr]   |         ^^^^
[INFO] [stderr] 6 |         age: u8,
[INFO] [stderr]   |         ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `Person` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: fields `name` and `age` are never read
[INFO] [stderr]   --> src/chap3/mod.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     struct Child {
[INFO] [stderr]    |            ----- fields in this struct
[INFO] [stderr] 11 |         // remove lifetime annotation
[INFO] [stderr] 12 |         name: String,
[INFO] [stderr]    |         ^^^^
[INFO] [stderr] 13 |         age: u8,
[INFO] [stderr]    |         ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Child` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: fields `father` and `kid` are never read
[INFO] [stderr]   --> src/chap3/mod.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     struct Family<'fl> {
[INFO] [stderr]    |            ------ fields in this struct
[INFO] [stderr] 18 |         // fl for family lifetime
[INFO] [stderr] 19 |         father: Person<'fl>,
[INFO] [stderr]    |         ^^^^^^
[INFO] [stderr] 20 |         kid: Child,
[INFO] [stderr]    |         ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Family` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: field `value` is never read
[INFO] [stderr]  --> src/chap6/mod.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |     struct Number {
[INFO] [stderr]   |            ------ field in this struct
[INFO] [stderr] 6 |         value: i32,
[INFO] [stderr]   |         ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `Number` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: `examples-in-rust` (bin "examples-in-rust" test) generated 21 warnings (run `cargo fix --bin "examples-in-rust" -p examples-in-rust --tests` to apply 7 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/examples_in_rust-14b807149fa2a101)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c358f36d43492c461af04dce90742f6030d72ffa9181e60be63f6b3112c201ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c358f36d43492c461af04dce90742f6030d72ffa9181e60be63f6b3112c201ae", kill_on_drop: false }`
[INFO] [stdout] c358f36d43492c461af04dce90742f6030d72ffa9181e60be63f6b3112c201ae
