[INFO] cloning repository https://github.com/lbfagioli/learning-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lbfagioli/learning-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flbfagioli%2Flearning-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flbfagioli%2Flearning-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a8da0e0347c59ab5f6459dc29221e0f915724bd0
[INFO] fixing lbfagioli/learning-rust against try#622891a4e29178280638a6b63a8908bde2c0c854+cargoflags=-Zfix-edition=start=2015 for pr-157817-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flbfagioli%2Flearning-rust" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/lbfagioli/learning-rust
[INFO] finished tweaking git repo https://github.com/lbfagioli/learning-rust
[INFO] tweaked toml for git repo https://github.com/lbfagioli/learning-rust written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/lbfagioli/learning-rust on toolchain 622891a4e29178280638a6b63a8908bde2c0c854
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/lbfagioli/learning-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" "+622891a4e29178280638a6b63a8908bde2c0c854" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3a6becf2bc8dde7f3fa57ede90e4f284e72d296796fc446bbb1e2c7cc0530151" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 1241f0e6778236cc9b0defa9355e6fc2c4f18152cf8f1eb4516aeed019a452f9
[INFO] running `Command { std: "docker" "start" "1241f0e6778236cc9b0defa9355e6fc2c4f18152cf8f1eb4516aeed019a452f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "1241f0e6778236cc9b0defa9355e6fc2c4f18152cf8f1eb4516aeed019a452f9" "/opt/rustwide/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1241f0e6778236cc9b0defa9355e6fc2c4f18152cf8f1eb4516aeed019a452f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=" "-e" "RUSTDOCFLAGS=" "-w" "/opt/rustwide/workdir" "--user" "0:0" "1241f0e6778236cc9b0defa9355e6fc2c4f18152cf8f1eb4516aeed019a452f9" "/opt/rustwide/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "fix" "--allow-no-vcs" "--allow-dirty" "--frozen" "--all" "--all-targets" "--message-format=json" "-Zfix-edition=start=2015", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-ident v1.0.17
[INFO] [stderr]    Compiling thiserror v2.0.11
[INFO] [stderr]    Compiling anyhow v1.0.96
[INFO] [stderr]    Compiling proc-macro2 v1.0.93
[INFO] [stderr]    Compiling quote v1.0.38
[INFO] [stderr]    Compiling syn v2.0.98
[INFO] [stderr]    Compiling thiserror-impl v2.0.11
[INFO] [stderr]     Checking tryrust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `while` condition
[INFO] [stdout]    --> src/day4/morning.rs:386:9
[INFO] [stdout]     |
[INFO] [stdout] 386 |   while (x < 700000) {
[INFO] [stdout]     |         ^          ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 386 -   while (x < 700000) {
[INFO] [stdout] 386 +   while x < 700000 {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `while` condition
[INFO] [stdout]    --> src/day4/morning.rs:386:9
[INFO] [stdout]     |
[INFO] [stdout] 386 |   while (x < 700000) {
[INFO] [stdout]     |         ^          ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 386 -   while (x < 700000) {
[INFO] [stdout] 386 +   while x < 700000 {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/day4/afternoon.rs:371:9
[INFO] [stdout]     |
[INFO] [stdout] 371 |     Err(err) => println!("error reading file")
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `metadata` is never read
[INFO] [stdout]   --> src/day2/afternoon.rs:44:3
[INFO] [stdout]    |
[INFO] [stdout] 42 | struct Key {
[INFO] [stdout]    |        --- field in this struct
[INFO] [stdout] 43 |   id: u32,
[INFO] [stdout] 44 |   metadata: Option<String>,
[INFO] [stdout]    |   ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x`, `y`, and `z` are never read
[INFO] [stdout]    --> src/day2/afternoon.rs:98:3
[INFO] [stdout]     |
[INFO] [stdout]  97 | struct Derived {
[INFO] [stdout]     |        ------- fields in this struct
[INFO] [stdout]  98 |   x: u32,
[INFO] [stdout]     |   ^
[INFO] [stdout]  99 |   y: String,
[INFO] [stdout]     |   ^
[INFO] [stdout] 100 |   z: Implemented,
[INFO] [stdout]     |   ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Derived` 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/day2/afternoon.rs:104:20
[INFO] [stdout]     |
[INFO] [stdout] 104 | struct Implemented(String);
[INFO] [stdout]     |        ----------- ^^^^^^
[INFO] [stdout]     |        |
[INFO] [stdout]     |        field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing this field
[INFO] [stdout]     = note: `Implemented` 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 `Add` and `Mul` are never constructed
[INFO] [stdout]   --> src/day2/morning.rs:66:3
[INFO] [stdout]    |
[INFO] [stdout] 65 | enum Operation {
[INFO] [stdout]    |      --------- variants in this enum
[INFO] [stdout] 66 |   Add,
[INFO] [stdout]    |   ^^^
[INFO] [stdout] 67 |   Sub,
[INFO] [stdout] 68 |   Mul,
[INFO] [stdout]    |   ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Operation` 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/day2/morning.rs:241:22
[INFO] [stdout]     |
[INFO] [stdout] 241 | struct MetersSquared(i32);
[INFO] [stdout]     |        ------------- ^^^
[INFO] [stdout]     |        |
[INFO] [stdout]     |        field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing this field
[INFO] [stdout]     = note: `MetersSquared` 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 `strength` and `hit_points` are never read
[INFO] [stdout]    --> src/day2/morning.rs:259:3
[INFO] [stdout]     |
[INFO] [stdout] 257 | struct Player {
[INFO] [stdout]     |        ------ fields in this struct
[INFO] [stdout] 258 |   name: String,
[INFO] [stdout] 259 |   strength: u8,
[INFO] [stdout]     |   ^^^^^^^^
[INFO] [stdout] 260 |   hit_points: u8,
[INFO] [stdout]     |   ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Player` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/day2/morning.rs:314:14
[INFO] [stdout]     |
[INFO] [stdout] 314 | struct Foofi(String);
[INFO] [stdout]     |        ----- ^^^^^^
[INFO] [stdout]     |        |
[INFO] [stdout]     |        field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing this field
[INFO] [stdout]     = note: `Foofi` 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 `lives` is never read
[INFO] [stdout]    --> src/day2/morning.rs:347:3
[INFO] [stdout]     |
[INFO] [stdout] 346 | struct Cat {
[INFO] [stdout]     |        --- field in this struct
[INFO] [stdout] 347 |   lives: i8,
[INFO] [stdout]     |   ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> src/day3/morning.rs:8:14
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct Point(i32, i32);
[INFO] [stdout]   |        ----- ^^^  ^^^
[INFO] [stdout]   |        |
[INFO] [stdout]   |        fields in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider removing these fields
[INFO] [stdout]   = note: `Point` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Java` and `Perl` are never constructed
[INFO] [stdout]   --> src/day3/morning.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | enum Language {
[INFO] [stdout]    |      -------- variants in this enum
[INFO] [stdout] 24 |     Rust,
[INFO] [stdout] 25 |     Java,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 26 |     Perl,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Language` 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 `version_expression` are never read
[INFO] [stdout]   --> src/day3/morning.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 30 | struct Dependency {
[INFO] [stdout]    |        ---------- fields in this struct
[INFO] [stdout] 31 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 32 |     version_expression: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Dependency` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]   --> src/day3/morning.rs:99:14
[INFO] [stdout]    |
[INFO] [stdout] 99 |   Element(T, Box<List<T>>),
[INFO] [stdout]    |   -------    ^^^^^^^^^^^^
[INFO] [stdout]    |   |
[INFO] [stdout]    |   field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `List` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 99 -   Element(T, Box<List<T>>),
[INFO] [stdout] 99 +   Element(T, ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `age` is never read
[INFO] [stdout]    --> src/day3/morning.rs:109:3
[INFO] [stdout]     |
[INFO] [stdout] 107 | struct Dog {
[INFO] [stdout]     |        --- field in this struct
[INFO] [stdout] 108 |   name: String,
[INFO] [stdout] 109 |   age: i8,
[INFO] [stdout]     |   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `lives` is never read
[INFO] [stdout]    --> src/day3/morning.rs:112:3
[INFO] [stdout]     |
[INFO] [stdout] 111 | struct Cat {
[INFO] [stdout]     |        --- field in this struct
[INFO] [stdout] 112 |   lives: i8,
[INFO] [stdout]     |   ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]    --> src/day3/morning.rs:133:8
[INFO] [stdout]     |
[INFO] [stdout] 133 | struct Node<T: Ord> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Subtree` is never constructed
[INFO] [stdout]    --> src/day3/morning.rs:140:8
[INFO] [stdout]     |
[INFO] [stdout] 140 | struct Subtree<T: Ord>(Option<Box<Node<T>>>);
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BinaryTree` is never constructed
[INFO] [stdout]    --> src/day3/morning.rs:143:8
[INFO] [stdout]     |
[INFO] [stdout] 143 | struct BinaryTree<T: Ord> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `insert`, `has`, and `len` are never used
[INFO] [stdout]    --> src/day3/morning.rs:148:6
[INFO] [stdout]     |
[INFO] [stdout] 147 | impl<T: Ord> Subtree<T> {
[INFO] [stdout]     | ----------------------- associated items in this implementation
[INFO] [stdout] 148 |   fn new() -> Self {
[INFO] [stdout]     |      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 152 |   fn insert(&mut self, value: T) {
[INFO] [stdout]     |      ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 170 |   fn has(&self, value: &T) -> bool {
[INFO] [stdout]     |      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 185 |   fn len(&self) -> usize {
[INFO] [stdout]     |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `insert`, `has`, and `len` are never used
[INFO] [stdout]    --> src/day3/morning.rs:200:6
[INFO] [stdout]     |
[INFO] [stdout] 199 | impl<T: Ord> BinaryTree<T> {
[INFO] [stdout]     | -------------------------- associated items in this implementation
[INFO] [stdout] 200 |   fn new() -> Self {
[INFO] [stdout]     |      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 204 |   fn insert(&mut self, value: T) {
[INFO] [stdout]     |      ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 208 |   fn has(&self, value: &T) -> bool {
[INFO] [stdout]     |      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 212 |   fn len(&self) -> usize {
[INFO] [stdout]     |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `height`, `visit_count`, and `last_blood_pressure` are never read
[INFO] [stdout]   --> src/day3/afternoon.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub struct User {
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 19 |     height: f32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 20 |     visit_count: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 21 |     last_blood_pressure: Option<(u32, u32)>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Measurements` is never constructed
[INFO] [stdout]   --> src/day3/afternoon.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct Measurements {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `HealthReport` is never constructed
[INFO] [stdout]   --> src/day3/afternoon.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct HealthReport<'a> {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `visit_doctor` is never used
[INFO] [stdout]   --> src/day3/afternoon.rs:41:10
[INFO] [stdout]    |
[INFO] [stdout] 36 | impl User {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 41 |   pub fn visit_doctor(&mut self, measurements: Measurements) -> HealthReport {
[INFO] [stdout]    |          ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `slice` and `color` are never read
[INFO] [stdout]    --> src/day3/afternoon.rs:117:3
[INFO] [stdout]     |
[INFO] [stdout] 116 | struct Highlight<'document> {
[INFO] [stdout]     |        --------- fields in this struct
[INFO] [stdout] 117 |   slice: &'document str,
[INFO] [stdout]     |   ^^^^^
[INFO] [stdout] 118 |   color: HighlightColor,
[INFO] [stdout]     |   ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Highlight` 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 `offset_differences` is never used
[INFO] [stdout]    --> src/day4/morning.rs:103:4
[INFO] [stdout]     |
[INFO] [stdout] 103 | fn offset_differences(offset: usize, values: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_word` is never used
[INFO] [stdout]    --> src/day4/morning.rs:204:4
[INFO] [stdout]     |
[INFO] [stdout] 204 | fn first_word(string: &str) -> &str {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `luhn` is never used
[INFO] [stdout]    --> src/day4/morning.rs:235:8
[INFO] [stdout]     |
[INFO] [stdout] 235 | pub fn luhn(cc_number: &str) -> bool {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `private` is never used
[INFO] [stdout]    --> src/day4/morning.rs:162:8
[INFO] [stdout]     |
[INFO] [stdout] 162 |     fn private() {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Operation` is never used
[INFO] [stdout]    --> src/day4/afternoon.rs:102:6
[INFO] [stdout]     |
[INFO] [stdout] 102 | enum Operation {
[INFO] [stdout]     |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Expression` is never used
[INFO] [stdout]    --> src/day4/afternoon.rs:111:6
[INFO] [stdout]     |
[INFO] [stdout] 111 | enum Expression {
[INFO] [stdout]     |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `DivideByZeroError` is never constructed
[INFO] [stdout]    --> src/day4/afternoon.rs:120:8
[INFO] [stdout]     |
[INFO] [stdout] 120 | struct DivideByZeroError;
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `eval` is never used
[INFO] [stdout]    --> src/day4/afternoon.rs:124:4
[INFO] [stdout]     |
[INFO] [stdout] 124 | fn eval(e: Expression) -> Result<i64, DivideByZeroError> {
[INFO] [stdout]     |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `sk` is never read
[INFO] [stdout]    --> src/day4/afternoon.rs:215:3
[INFO] [stdout]     |
[INFO] [stdout] 213 | struct KeyPair {
[INFO] [stdout]     |        ------- field in this struct
[INFO] [stdout] 214 |   pk: [u16; 4], // 2 * 4 bytes = 8 bytes
[INFO] [stdout] 215 |   sk: [u16; 4],
[INFO] [stdout]     |   ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `IntoBytes` is never used
[INFO] [stdout]    --> src/day4/afternoon.rs:231:18
[INFO] [stdout]     |
[INFO] [stdout] 231 | pub unsafe trait IntoBytes {
[INFO] [stdout]     |                  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `path` is never read
[INFO] [stdout]    --> src/day4/afternoon.rs:304:3
[INFO] [stdout]     |
[INFO] [stdout] 303 | struct DirectoryIterator {
[INFO] [stdout]     |        ----------------- field in this struct
[INFO] [stdout] 304 |   path: CString,
[INFO] [stdout]     |   ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `DirectoryIterator` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:21:3
[INFO] [stdout]    |
[INFO] [stdout] 21 |   day4::afternoon::run();
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 21 |   let _ = day4::afternoon::run();
[INFO] [stdout]    |   +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/day3/afternoon.rs:41:23
[INFO] [stdout]    |
[INFO] [stdout] 41 |   pub fn visit_doctor(&mut self, measurements: Measurements) -> HealthReport {
[INFO] [stdout]    |                       ^^^^^^^^^ the lifetime is elided here     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 41 |   pub fn visit_doctor(&mut self, measurements: Measurements) -> HealthReport<'_> {
[INFO] [stdout]    |                                                                             ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/day3/afternoon.rs:233:22
[INFO] [stdout]     |
[INFO] [stdout] 233 | fn parse_field(data: &[u8]) -> (Field, &[u8]) {
[INFO] [stdout]     |                      ^^^^^      ^^^^^  ^^^^^ the same lifetime is elided here
[INFO] [stdout]     |                      |          |
[INFO] [stdout]     |                      |          the same lifetime is hidden here
[INFO] [stdout]     |                      the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 233 | fn parse_field(data: &[u8]) -> (Field<'_>, &[u8]) {
[INFO] [stdout]     |                                      ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: creating a shared reference to mutable static
[INFO] [stdout]    --> src/day4/afternoon.rs:430:25
[INFO] [stdout]     |
[INFO] [stdout] 430 |     println!("counter: {COUNTER}");
[INFO] [stdout]     |                         ^^^^^^^ shared reference to mutable static
[INFO] [stdout]     |
[INFO] [stdout]     = note: shared references to mutable statics are dangerous; it's undefined behavior if the static is mutated or if a mutable reference is created for it while the shared reference lives
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/static-mut-references.html>
[INFO] [stdout]     = note: `#[warn(static_mut_refs)]` (part of `#[warn(rust_2024_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/day4/afternoon.rs:371:9
[INFO] [stdout]     |
[INFO] [stdout] 371 |     Err(err) => println!("error reading file")
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `metadata` is never read
[INFO] [stdout]   --> src/day2/afternoon.rs:44:3
[INFO] [stdout]    |
[INFO] [stdout] 42 | struct Key {
[INFO] [stdout]    |        --- field in this struct
[INFO] [stdout] 43 |   id: u32,
[INFO] [stdout] 44 |   metadata: Option<String>,
[INFO] [stdout]    |   ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x`, `y`, and `z` are never read
[INFO] [stdout]    --> src/day2/afternoon.rs:98:3
[INFO] [stdout]     |
[INFO] [stdout]  97 | struct Derived {
[INFO] [stdout]     |        ------- fields in this struct
[INFO] [stdout]  98 |   x: u32,
[INFO] [stdout]     |   ^
[INFO] [stdout]  99 |   y: String,
[INFO] [stdout]     |   ^
[INFO] [stdout] 100 |   z: Implemented,
[INFO] [stdout]     |   ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Derived` 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/day2/afternoon.rs:104:20
[INFO] [stdout]     |
[INFO] [stdout] 104 | struct Implemented(String);
[INFO] [stdout]     |        ----------- ^^^^^^
[INFO] [stdout]     |        |
[INFO] [stdout]     |        field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing this field
[INFO] [stdout]     = note: `Implemented` 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/day2/morning.rs:241:22
[INFO] [stdout]     |
[INFO] [stdout] 241 | struct MetersSquared(i32);
[INFO] [stdout]     |        ------------- ^^^
[INFO] [stdout]     |        |
[INFO] [stdout]     |        field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing this field
[INFO] [stdout]     = note: `MetersSquared` 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 `strength` and `hit_points` are never read
[INFO] [stdout]    --> src/day2/morning.rs:259:3
[INFO] [stdout]     |
[INFO] [stdout] 257 | struct Player {
[INFO] [stdout]     |        ------ fields in this struct
[INFO] [stdout] 258 |   name: String,
[INFO] [stdout] 259 |   strength: u8,
[INFO] [stdout]     |   ^^^^^^^^
[INFO] [stdout] 260 |   hit_points: u8,
[INFO] [stdout]     |   ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Player` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/day2/morning.rs:314:14
[INFO] [stdout]     |
[INFO] [stdout] 314 | struct Foofi(String);
[INFO] [stdout]     |        ----- ^^^^^^
[INFO] [stdout]     |        |
[INFO] [stdout]     |        field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing this field
[INFO] [stdout]     = note: `Foofi` 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 `lives` is never read
[INFO] [stdout]    --> src/day2/morning.rs:347:3
[INFO] [stdout]     |
[INFO] [stdout] 346 | struct Cat {
[INFO] [stdout]     |        --- field in this struct
[INFO] [stdout] 347 |   lives: i8,
[INFO] [stdout]     |   ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> src/day3/morning.rs:8:14
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct Point(i32, i32);
[INFO] [stdout]   |        ----- ^^^  ^^^
[INFO] [stdout]   |        |
[INFO] [stdout]   |        fields in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider removing these fields
[INFO] [stdout]   = note: `Point` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Java` and `Perl` are never constructed
[INFO] [stdout]   --> src/day3/morning.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | enum Language {
[INFO] [stdout]    |      -------- variants in this enum
[INFO] [stdout] 24 |     Rust,
[INFO] [stdout] 25 |     Java,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 26 |     Perl,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Language` 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 `version_expression` are never read
[INFO] [stdout]   --> src/day3/morning.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 30 | struct Dependency {
[INFO] [stdout]    |        ---------- fields in this struct
[INFO] [stdout] 31 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 32 |     version_expression: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Dependency` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]   --> src/day3/morning.rs:99:14
[INFO] [stdout]    |
[INFO] [stdout] 99 |   Element(T, Box<List<T>>),
[INFO] [stdout]    |   -------    ^^^^^^^^^^^^
[INFO] [stdout]    |   |
[INFO] [stdout]    |   field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `List` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 99 -   Element(T, Box<List<T>>),
[INFO] [stdout] 99 +   Element(T, ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `age` is never read
[INFO] [stdout]    --> src/day3/morning.rs:109:3
[INFO] [stdout]     |
[INFO] [stdout] 107 | struct Dog {
[INFO] [stdout]     |        --- field in this struct
[INFO] [stdout] 108 |   name: String,
[INFO] [stdout] 109 |   age: i8,
[INFO] [stdout]     |   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `lives` is never read
[INFO] [stdout]    --> src/day3/morning.rs:112:3
[INFO] [stdout]     |
[INFO] [stdout] 111 | struct Cat {
[INFO] [stdout]     |        --- field in this struct
[INFO] [stdout] 112 |   lives: i8,
[INFO] [stdout]     |   ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `slice` and `color` are never read
[INFO] [stdout]    --> src/day3/afternoon.rs:117:3
[INFO] [stdout]     |
[INFO] [stdout] 116 | struct Highlight<'document> {
[INFO] [stdout]     |        --------- fields in this struct
[INFO] [stdout] 117 |   slice: &'document str,
[INFO] [stdout]     |   ^^^^^
[INFO] [stdout] 118 |   color: HighlightColor,
[INFO] [stdout]     |   ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Highlight` 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 `private` is never used
[INFO] [stdout]    --> src/day4/morning.rs:162:8
[INFO] [stdout]     |
[INFO] [stdout] 162 |     fn private() {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Add` and `Mul` are never constructed
[INFO] [stdout]    --> src/day4/afternoon.rs:103:3
[INFO] [stdout]     |
[INFO] [stdout] 102 | enum Operation {
[INFO] [stdout]     |      --------- variants in this enum
[INFO] [stdout] 103 |   Add,
[INFO] [stdout]     |   ^^^
[INFO] [stdout] 104 |   Sub,
[INFO] [stdout] 105 |   Mul,
[INFO] [stdout]     |   ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Operation` 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 `sk` is never read
[INFO] [stdout]    --> src/day4/afternoon.rs:215:3
[INFO] [stdout]     |
[INFO] [stdout] 213 | struct KeyPair {
[INFO] [stdout]     |        ------- field in this struct
[INFO] [stdout] 214 |   pk: [u16; 4], // 2 * 4 bytes = 8 bytes
[INFO] [stdout] 215 |   sk: [u16; 4],
[INFO] [stdout]     |   ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `IntoBytes` is never used
[INFO] [stdout]    --> src/day4/afternoon.rs:231:18
[INFO] [stdout]     |
[INFO] [stdout] 231 | pub unsafe trait IntoBytes {
[INFO] [stdout]     |                  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `path` is never read
[INFO] [stdout]    --> src/day4/afternoon.rs:304:3
[INFO] [stdout]     |
[INFO] [stdout] 303 | struct DirectoryIterator {
[INFO] [stdout]     |        ----------------- field in this struct
[INFO] [stdout] 304 |   path: CString,
[INFO] [stdout]     |   ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `DirectoryIterator` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:21:3
[INFO] [stdout]    |
[INFO] [stdout] 21 |   day4::afternoon::run();
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 21 |   let _ = day4::afternoon::run();
[INFO] [stdout]    |   +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/day3/afternoon.rs:41:23
[INFO] [stdout]    |
[INFO] [stdout] 41 |   pub fn visit_doctor(&mut self, measurements: Measurements) -> HealthReport {
[INFO] [stdout]    |                       ^^^^^^^^^ the lifetime is elided here     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 41 |   pub fn visit_doctor(&mut self, measurements: Measurements) -> HealthReport<'_> {
[INFO] [stdout]    |                                                                             ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/day3/afternoon.rs:233:22
[INFO] [stdout]     |
[INFO] [stdout] 233 | fn parse_field(data: &[u8]) -> (Field, &[u8]) {
[INFO] [stdout]     |                      ^^^^^      ^^^^^  ^^^^^ the same lifetime is elided here
[INFO] [stdout]     |                      |          |
[INFO] [stdout]     |                      |          the same lifetime is hidden here
[INFO] [stdout]     |                      the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 233 | fn parse_field(data: &[u8]) -> (Field<'_>, &[u8]) {
[INFO] [stdout]     |                                      ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: creating a shared reference to mutable static
[INFO] [stdout]    --> src/day4/afternoon.rs:430:25
[INFO] [stdout]     |
[INFO] [stdout] 430 |     println!("counter: {COUNTER}");
[INFO] [stdout]     |                         ^^^^^^^ shared reference to mutable static
[INFO] [stdout]     |
[INFO] [stdout]     = note: shared references to mutable statics are dangerous; it's undefined behavior if the static is mutated or if a mutable reference is created for it while the shared reference lives
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/static-mut-references.html>
[INFO] [stdout]     = note: `#[warn(static_mut_refs)]` (part of `#[warn(rust_2024_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.64s
[INFO] [stderr] crater-edition-check: all finished
[INFO] running `Command { std: "docker" "inspect" "1241f0e6778236cc9b0defa9355e6fc2c4f18152cf8f1eb4516aeed019a452f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1241f0e6778236cc9b0defa9355e6fc2c4f18152cf8f1eb4516aeed019a452f9", kill_on_drop: false }`
[INFO] [stdout] 1241f0e6778236cc9b0defa9355e6fc2c4f18152cf8f1eb4516aeed019a452f9
