[INFO] cloning repository https://github.com/sfyr111/rcrash
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sfyr111/rcrash" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsfyr111%2Frcrash", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsfyr111%2Frcrash'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8a119063caf99c8cf01ff1de0aef9ff11f2a9ccb
[INFO] checking sfyr111/rcrash against try#a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d for pr-145342-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsfyr111%2Frcrash" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/sfyr111/rcrash
[INFO] finished tweaking git repo https://github.com/sfyr111/rcrash
[INFO] tweaked toml for git repo https://github.com/sfyr111/rcrash written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/sfyr111/rcrash on toolchain a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/sfyr111/rcrash 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" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d383db2f6c74d44873057a0951e465fb3ea452f046f98dc6526540ca6c98f2ac
[INFO] running `Command { std: "docker" "start" "-a" "d383db2f6c74d44873057a0951e465fb3ea452f046f98dc6526540ca6c98f2ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d383db2f6c74d44873057a0951e465fb3ea452f046f98dc6526540ca6c98f2ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d383db2f6c74d44873057a0951e465fb3ea452f046f98dc6526540ca6c98f2ac", kill_on_drop: false }`
[INFO] [stdout] d383db2f6c74d44873057a0951e465fb3ea452f046f98dc6526540ca6c98f2ac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c2fb4885b356a9e2a17c59d30c224879ae52466bb2f97722ff71c26e32f131cc
[INFO] running `Command { std: "docker" "start" "-a" "c2fb4885b356a9e2a17c59d30c224879ae52466bb2f97722ff71c26e32f131cc", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.172
[INFO] [stderr]    Compiling zerocopy v0.8.25
[INFO] [stderr]    Compiling getrandom v0.3.2
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking rand_core v0.9.3
[INFO] [stderr]     Checking ppv-lite86 v0.2.21
[INFO] [stderr]     Checking rand_chacha v0.9.0
[INFO] [stderr]     Checking rand v0.9.1
[INFO] [stderr]     Checking rcrash v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `never_returns` is never used
[INFO] [stdout]  --> src/bin/ch04_14_never.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn never_returns() -> ! {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `infinite_loop` is never used
[INFO] [stdout]  --> src/bin/ch04_14_never.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn infinite_loop() -> ! {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/bin/ch08_03_recoverable.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | /     /// This example demonstrates how to use `match` to handle the `Result` returned by `File::open`.
[INFO] [stdout] 28 | |     /// It's a good practice to handle errors explicitly, rather than using `unwrap` or `expect`.
[INFO] [stdout]    | |_________________________________________________________________________________________________^
[INFO] [stdout] 29 | /     match File::open("hello.txt") {
[INFO] [stdout] 30 | |         Ok(mut file) => {
[INFO] [stdout] 31 | |             let mut contents = String::new();
[INFO] [stdout] 32 | |             file.read_to_string(&mut contents).unwrap_or(0);
[INFO] [stdout] ...  |
[INFO] [stdout] 38 | |     }
[INFO] [stdout]    | |_____- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `private_fn` is never used
[INFO] [stdout]  --> src/bin/ch05_03_pub.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 |     fn private_fn() {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `only_inner` is never used
[INFO] [stdout]   --> src/bin/ch05_03_pub.rs:19:22
[INFO] [stdout]    |
[INFO] [stdout] 19 |         pub(self) fn only_inner() {
[INFO] [stdout]    |                      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `visible_to_outer` is never used
[INFO] [stdout]   --> src/bin/ch05_03_pub.rs:24:23
[INFO] [stdout]    |
[INFO] [stdout] 24 |         pub(super) fn visible_to_outer() {
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `inner_private_fn` is never used
[INFO] [stdout]   --> src/bin/ch05_03_pub.rs:39:12
[INFO] [stdout]    |
[INFO] [stdout] 39 |         fn inner_private_fn() {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary transmute
[INFO] [stdout]   --> src/bin/ch03_14_cast.rs:60:31
[INFO] [stdout]    |
[INFO] [stdout] 60 |     let b: [u8; 4] = unsafe { transmute(a) };
[INFO] [stdout]    |                               ---------^^^
[INFO] [stdout]    |                               |
[INFO] [stdout]    |                               help: replace this with: `u32::to_ne_bytes`
[INFO] [stdout]    |
[INFO] [stdout]    = help: there's also `to_le_bytes` and `to_be_bytes` if you expect a particular byte order
[INFO] [stdout]    = note: `#[warn(unnecessary_transmutes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PrivateStruct` is never constructed
[INFO] [stdout]   --> src/bin/ch05_04_struct_visibility.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 37 |     struct PrivateStruct {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/bin/ch03_11_enum.rs:60:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |             _ => println!("Message: Unknown"),
[INFO] [stdout]    |             ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> src/bin/ch03_11_enum.rs:60:13
[INFO] [stdout]    |
[INFO] [stdout] 56 |             Message::Quit => println!("Message: Quit"),
[INFO] [stdout]    |             ------------- matches some of the same values
[INFO] [stdout] 57 |             Message::Move { x, y } => println!("Message: Move to x={}, y={}", x, y),
[INFO] [stdout]    |             ---------------------- matches some of the same values
[INFO] [stdout] 58 |             Message::Write(s) => println!("Message: Write '{}'", s),
[INFO] [stdout]    |             ----------------- matches some of the same values
[INFO] [stdout] 59 |             Message::ChangeColor(r, g, b) => println!("Message: ChangeColor({}, {}, {})", r, g, b),
[INFO] [stdout]    |             ----------------------------- matches some of the same values
[INFO] [stdout] 60 |             _ => println!("Message: Unknown"),
[INFO] [stdout]    |             ^ collectively making this unreachable
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/bin/ch08_03_recoverable.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | /     /// This example demonstrates how to use `match` to handle the `Result` returned by `File::open`.
[INFO] [stdout] 28 | |     /// It's a good practice to handle errors explicitly, rather than using `unwrap` or `expect`.
[INFO] [stdout]    | |_________________________________________________________________________________________________^
[INFO] [stdout] 29 | /     match File::open("hello.txt") {
[INFO] [stdout] 30 | |         Ok(mut file) => {
[INFO] [stdout] 31 | |             let mut contents = String::new();
[INFO] [stdout] 32 | |             file.read_to_string(&mut contents).unwrap_or(0);
[INFO] [stdout] ...  |
[INFO] [stdout] 38 | |     }
[INFO] [stdout]    | |_____- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Error` is never constructed
[INFO] [stdout]   --> src/bin/ch04_8_if_let.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     enum Status {
[INFO] [stdout]    |          ------ variant in this enum
[INFO] [stdout] 12 |         Ok(u32),
[INFO] [stdout] 13 |         Error(String),
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/bin/ch03_11_enum.rs:60:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |             _ => println!("Message: Unknown"),
[INFO] [stdout]    |             ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> src/bin/ch03_11_enum.rs:60:13
[INFO] [stdout]    |
[INFO] [stdout] 56 |             Message::Quit => println!("Message: Quit"),
[INFO] [stdout]    |             ------------- matches some of the same values
[INFO] [stdout] 57 |             Message::Move { x, y } => println!("Message: Move to x={}, y={}", x, y),
[INFO] [stdout]    |             ---------------------- matches some of the same values
[INFO] [stdout] 58 |             Message::Write(s) => println!("Message: Write '{}'", s),
[INFO] [stdout]    |             ----------------- matches some of the same values
[INFO] [stdout] 59 |             Message::ChangeColor(r, g, b) => println!("Message: ChangeColor({}, {}, {})", r, g, b),
[INFO] [stdout]    |             ----------------------------- matches some of the same values
[INFO] [stdout] 60 |             _ => println!("Message: Unknown"),
[INFO] [stdout]    |             ^ collectively making this unreachable
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `North`, `South`, and `West` are never constructed
[INFO] [stdout]  --> src/bin/ch03_11_enum.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     enum Direction {
[INFO] [stdout]   |          --------- variants in this enum
[INFO] [stdout] 4 |         North,
[INFO] [stdout]   |         ^^^^^
[INFO] [stdout] 5 |         East,
[INFO] [stdout] 6 |         South,
[INFO] [stdout]   |         ^^^^^
[INFO] [stdout] 7 |         West,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Ok` and `InternalError` are never constructed
[INFO] [stdout]   --> src/bin/ch03_11_enum.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     enum Status {
[INFO] [stdout]    |          ------ variants in this enum
[INFO] [stdout] 24 |         Ok = 200,
[INFO] [stdout]    |         ^^
[INFO] [stdout] 25 |         NotFound = 404,
[INFO] [stdout] 26 |         InternalError = 500,
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `never_returns` is never used
[INFO] [stdout]  --> src/bin/ch04_14_never.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn never_returns() -> ! {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `infinite_loop` is never used
[INFO] [stdout]  --> src/bin/ch04_14_never.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn infinite_loop() -> ! {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary transmute
[INFO] [stdout]   --> src/bin/ch03_14_cast.rs:60:31
[INFO] [stdout]    |
[INFO] [stdout] 60 |     let b: [u8; 4] = unsafe { transmute(a) };
[INFO] [stdout]    |                               ---------^^^
[INFO] [stdout]    |                               |
[INFO] [stdout]    |                               help: replace this with: `u32::to_ne_bytes`
[INFO] [stdout]    |
[INFO] [stdout]    = help: there's also `to_le_bytes` and `to_be_bytes` if you expect a particular byte order
[INFO] [stdout]    = note: `#[warn(unnecessary_transmutes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Red` and `Blue` are never constructed
[INFO] [stdout]   --> src/bin/ch04_7_match.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     enum Color {
[INFO] [stdout]    |          ----- variants in this enum
[INFO] [stdout] 13 |         Red,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 14 |         Green,
[INFO] [stdout] 15 |         Blue,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/bin/ch09_03_rc.rs:24:14
[INFO] [stdout]    |
[INFO] [stdout] 24 |         Cons(i32, Rc<List>),
[INFO] [stdout]    |         ---- ^^^  ^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         fields 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]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 24 -         Cons(i32, Rc<List>),
[INFO] [stdout] 24 +         Cons((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/bin/ch08_02_unrecoverable.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let v = vec![1, 2, 3];
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `always_fails` is never used
[INFO] [stdout]   --> src/bin/ch08_02_unrecoverable.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn always_fails() {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/bin/ch08_02_unrecoverable.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let v = vec![1, 2, 3];
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `always_fails` is never used
[INFO] [stdout]   --> src/bin/ch08_02_unrecoverable.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn always_fails() {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Red` and `Blue` are never constructed
[INFO] [stdout]   --> src/bin/ch04_2_expr.rs:38:18
[INFO] [stdout]    |
[INFO] [stdout] 38 |     enum Color { Red, Green, Blue }
[INFO] [stdout]    |          -----   ^^^         ^^^^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          variants in this enum
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/bin/ch09_02_box.rs:21:14
[INFO] [stdout]    |
[INFO] [stdout] 21 |         Cons(i32, Box<List>),
[INFO] [stdout]    |         ---- ^^^  ^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         fields 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]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 21 -         Cons(i32, Box<List>),
[INFO] [stdout] 21 +         Cons((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PrivateStruct` is never constructed
[INFO] [stdout]   --> src/bin/ch05_04_struct_visibility.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 37 |     struct PrivateStruct {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `private_fn` is never used
[INFO] [stdout]  --> src/bin/ch05_03_pub.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 |     fn private_fn() {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `only_inner` is never used
[INFO] [stdout]   --> src/bin/ch05_03_pub.rs:19:22
[INFO] [stdout]    |
[INFO] [stdout] 19 |         pub(self) fn only_inner() {
[INFO] [stdout]    |                      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `visible_to_outer` is never used
[INFO] [stdout]   --> src/bin/ch05_03_pub.rs:24:23
[INFO] [stdout]    |
[INFO] [stdout] 24 |         pub(super) fn visible_to_outer() {
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `inner_private_fn` is never used
[INFO] [stdout]   --> src/bin/ch05_03_pub.rs:39:12
[INFO] [stdout]    |
[INFO] [stdout] 39 |         fn inner_private_fn() {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.76s
[INFO] running `Command { std: "docker" "inspect" "c2fb4885b356a9e2a17c59d30c224879ae52466bb2f97722ff71c26e32f131cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c2fb4885b356a9e2a17c59d30c224879ae52466bb2f97722ff71c26e32f131cc", kill_on_drop: false }`
[INFO] [stdout] c2fb4885b356a9e2a17c59d30c224879ae52466bb2f97722ff71c26e32f131cc