[INFO] fetching crate rust_project_demo 0.1.0...
[INFO] testing rust_project_demo-0.1.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate rust_project_demo 0.1.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate rust_project_demo 0.1.0
[INFO] finished tweaking crates.io crate rust_project_demo 0.1.0
[INFO] tweaked toml for crates.io crate rust_project_demo 0.1.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rust_project_demo 0.1.0 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rust_project_demo 0.1.0 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" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2476f6f82b1a9cbb00d313e7b8aea954173a01b50bced21b6f58b57c7c64e601
[INFO] running `Command { std: "docker" "start" "-a" "2476f6f82b1a9cbb00d313e7b8aea954173a01b50bced21b6f58b57c7c64e601", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2476f6f82b1a9cbb00d313e7b8aea954173a01b50bced21b6f58b57c7c64e601", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2476f6f82b1a9cbb00d313e7b8aea954173a01b50bced21b6f58b57c7c64e601", kill_on_drop: false }`
[INFO] [stdout] 2476f6f82b1a9cbb00d313e7b8aea954173a01b50bced21b6f58b57c7c64e601
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2afd9fff322dc30fbf6016e628c5309b8f2d49e75cd337d00589d871f8c2d91b
[INFO] running `Command { std: "docker" "start" "-a" "2afd9fff322dc30fbf6016e628c5309b8f2d49e75cd337d00589d871f8c2d91b", kill_on_drop: false }`
[INFO] [stderr] warning: rust_project_demo v0.1.0 (/opt/rustwide/workdir) ignoring invalid dependency `rust_tutorials` which is missing a lib target
[INFO] [stderr]    Compiling libc v0.2.132
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling rust_project_demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `item2`
[INFO] [stdout]   --> src/lib.rs:53:32
[INFO] [stdout]    |
[INFO] [stdout] 53 | pub fn notify3<T, U>(item1: T, item2: U)
[INFO] [stdout]    |                                ^^^^^ help: if this is intentional, prefix it with an underscore: `_item2`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::format`
[INFO] [stdout]  --> src/string.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::format;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::error::Error`
[INFO] [stdout]  --> src/result_enum.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::error::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rust_project_demo::Summary`
[INFO] [stdout]   --> src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | use rust_project_demo::Summary;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `array`
[INFO] [stdout]  --> src/array_type.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let array: [i32; 5] = [1, 2, 3, 4, 5];
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_array`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `var`
[INFO] [stdout]   --> src/stack_heap.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let var = 5;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_var`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/stack_heap.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let y = x;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/reference_borrowing.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let mut s = String::from("hello");
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]   --> src/struct.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let res=Rectangle::square(20);
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/struct.rs:112:17
[INFO] [stdout]     |
[INFO] [stdout] 112 | pub fn greeting(name: &str) -> String {
[INFO] [stdout]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `four`
[INFO] [stdout]   --> src/enum.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let four = Ipaddrtype::V4;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_four`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `six`
[INFO] [stdout]   --> src/enum.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let six = Ipaddrtype::V6;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_six`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `Ipaddr6`
[INFO] [stdout]   --> src/enum.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let Ipaddr6 = Ipaddr {
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Ipaddr6`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `call`
[INFO] [stdout]   --> src/enum.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let call = Ipaddr4.iptype.call();
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_call`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `Ipaddri`
[INFO] [stdout]   --> src/enum.rs:59:14
[INFO] [stdout]    |
[INFO] [stdout] 59 |         Some(Ipaddri) => Some(a.unwrap() + 1),
[INFO] [stdout]    |              ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Ipaddri`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `row`
[INFO] [stdout]   --> src/vector.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let row=vec![
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_row`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hashmap`
[INFO] [stdout]  --> src/hashmap.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let hashmap: HashMap<_, _> = teams.iter().zip(scores.iter()).collect();
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_hashmap`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/result_enum.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut array = vec![1, 20, 3, 4, 0];
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/result_enum.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let mut array = vec![10, 20, 30, 4, 100];
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/result_enum.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let mut array = vec![String::from("hello"),String::from("world")];
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/result_enum.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let f = File::open("hello.txt").unwrap_or_else(|error| {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/result_enum.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 56 |     let f = match f {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `importantExcerpt`
[INFO] [stdout]   --> src/life_time.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let importantExcerpt = ImportantExcerpt {
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_importantExcerpt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]    --> src/function_closures.rs:126:9
[INFO] [stdout]     |
[INFO] [stdout] 126 |     let s = example_closure(String::from("hello"));
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_two` is never used
[INFO] [stdout]    --> src/struct.rs:108:8
[INFO] [stdout]     |
[INFO] [stdout] 108 | pub fn add_two(a: i32) -> i32 {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `greeting` is never used
[INFO] [stdout]    --> src/struct.rs:112:8
[INFO] [stdout]     |
[INFO] [stdout] 112 | pub fn greeting(name: &str) -> String {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, `2`, and `3` are never read
[INFO] [stdout]  --> src/enum.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 |     V4(i8, i8, i8, i8),
[INFO] [stdout]   |     -- ^^  ^^  ^^  ^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     fields in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Ipaddrtype` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[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] 4 -     V4(i8, i8, i8, i8),
[INFO] [stdout] 4 +     V4((), (), (), ()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/enum.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 |     V6(String),
[INFO] [stdout]   |     -- ^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Ipaddrtype` 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] 5 -     V6(String),
[INFO] [stdout] 5 +     V6(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `address` is never read
[INFO] [stdout]   --> src/enum.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Ipaddr {
[INFO] [stdout]    |        ------ field in this struct
[INFO] [stdout] 14 |     iptype: Ipaddrtype,
[INFO] [stdout] 15 |     address: String,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Ipaddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `SpreadsheetCell` is never used
[INFO] [stdout]   --> src/vector.rs:37:6
[INFO] [stdout]    |
[INFO] [stdout] 37 | enum SpreadsheetCell{
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `vector_enum` is never used
[INFO] [stdout]   --> src/vector.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub fn vector_enum() {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `mix` is never used
[INFO] [stdout]   --> src/generic.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl<T: Display, U: Debug> Point<T, U> {
[INFO] [stdout]    | -------------------------------------- method in this implementation
[INFO] [stdout] 19 |     fn mix<V, W>(self, other: Point<V, W>) -> Point<T, W> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `part` is never read
[INFO] [stdout]   --> src/life_time.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 39 | struct ImportantExcerpt<'a> {
[INFO] [stdout]    |        ---------------- field in this struct
[INFO] [stdout] 40 |     part: &'a str,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `level` and `announce_and_return_part` are never used
[INFO] [stdout]   --> src/life_time.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | impl<'a> ImportantExcerpt<'a> {
[INFO] [stdout]    | ----------------------------- methods in this implementation
[INFO] [stdout] 45 |     fn level(&self) -> i32 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |     fn announce_and_return_part(&self, announcement: &str) -> &str {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest_with_an_announcement` is never used
[INFO] [stdout]   --> src/life_time.rs:69:4
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn longest_with_an_announcement<'a, T>(
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/accepting_command_line_arguments.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn main() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/accepting_command_line_arguments.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn run(config: Config) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Config` is never constructed
[INFO] [stdout]   --> src/accepting_command_line_arguments.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | struct Config {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/accepting_command_line_arguments.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 47 | impl Config {
[INFO] [stdout]    | ----------- associated function in this implementation
[INFO] [stdout] 48 |     // fn new(args: &[String]) -> Result<Config, &'static str> {
[INFO] [stdout] 49 |     fn new(mut args: std::env::Args) -> Result<Config, &'static str> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `search` is never used
[INFO] [stdout]   --> src/accepting_command_line_arguments.rs:82:8
[INFO] [stdout]    |
[INFO] [stdout] 82 | pub fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `search_case_insensitive` is never used
[INFO] [stdout]   --> src/accepting_command_line_arguments.rs:95:8
[INFO] [stdout]    |
[INFO] [stdout] 95 | pub fn search_case_insensitive<'a>(
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]    --> src/function_closures.rs:176:8
[INFO] [stdout]     |
[INFO] [stdout] 176 | struct Rectangle {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sort_by_key` is never used
[INFO] [stdout]    --> src/function_closures.rs:181:8
[INFO] [stdout]     |
[INFO] [stdout] 181 | pub fn sort_by_key() {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `produce_new_iterators` is never used
[INFO] [stdout]    --> src/function_closures.rs:272:8
[INFO] [stdout]     |
[INFO] [stdout] 272 | pub fn produce_new_iterators() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Counter` is never constructed
[INFO] [stdout]    --> src/function_closures.rs:282:8
[INFO] [stdout]     |
[INFO] [stdout] 282 | struct Counter {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/function_closures.rs:287:8
[INFO] [stdout]     |
[INFO] [stdout] 286 | impl Counter {
[INFO] [stdout]     | ------------ associated function in this implementation
[INFO] [stdout] 287 |     fn new() -> Counter {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Ipaddr4` should have a snake case name
[INFO] [stdout]   --> src/enum.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let Ipaddr4 = Ipaddr {
[INFO] [stdout]    |         ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `ipaddr4`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Ipaddr6` should have a snake case name
[INFO] [stdout]   --> src/enum.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let Ipaddr6 = Ipaddr {
[INFO] [stdout]    |         ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `ipaddr6`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Ipaddri` should have a snake case name
[INFO] [stdout]   --> src/enum.rs:59:14
[INFO] [stdout]    |
[INFO] [stdout] 59 |         Some(Ipaddri) => Some(a.unwrap() + 1),
[INFO] [stdout]    |              ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `ipaddri`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/result_enum.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     read_username_from_file();
[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] 16 |     let _ = read_username_from_file();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `importantExcerpt` should have a snake case name
[INFO] [stdout]   --> src/life_time.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let importantExcerpt = ImportantExcerpt {
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `important_excerpt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [optimized + debuginfo] target(s) in 4.71s
[INFO] running `Command { std: "docker" "inspect" "2afd9fff322dc30fbf6016e628c5309b8f2d49e75cd337d00589d871f8c2d91b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2afd9fff322dc30fbf6016e628c5309b8f2d49e75cd337d00589d871f8c2d91b", kill_on_drop: false }`
[INFO] [stdout] 2afd9fff322dc30fbf6016e628c5309b8f2d49e75cd337d00589d871f8c2d91b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a70fd1024333ac2ffe0cbcd6675e3e46c58157b4b9eaf98c55d474df2f5c3169
[INFO] running `Command { std: "docker" "start" "-a" "a70fd1024333ac2ffe0cbcd6675e3e46c58157b4b9eaf98c55d474df2f5c3169", kill_on_drop: false }`
[INFO] [stderr] warning: rust_project_demo v0.1.0 (/opt/rustwide/workdir) ignoring invalid dependency `rust_tutorials` which is missing a lib target
[INFO] [stdout] warning: unused variable: `item2`
[INFO] [stdout]   --> src/lib.rs:53:32
[INFO] [stdout]    |
[INFO] [stdout] 53 | pub fn notify3<T, U>(item1: T, item2: U)
[INFO] [stdout]    |                                ^^^^^ help: if this is intentional, prefix it with an underscore: `_item2`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rust_project_demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::fmt::format`
[INFO] [stdout]  --> src/string.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::format;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::error::Error`
[INFO] [stdout]  --> src/result_enum.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::error::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rust_project_demo::Summary`
[INFO] [stdout]   --> src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | use rust_project_demo::Summary;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `array`
[INFO] [stdout]  --> src/array_type.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let array: [i32; 5] = [1, 2, 3, 4, 5];
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_array`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `var`
[INFO] [stdout]   --> src/stack_heap.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let var = 5;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_var`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/stack_heap.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let y = x;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/reference_borrowing.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let mut s = String::from("hello");
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]   --> src/struct.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let res=Rectangle::square(20);
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/struct.rs:112:17
[INFO] [stdout]     |
[INFO] [stdout] 112 | pub fn greeting(name: &str) -> String {
[INFO] [stdout]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `four`
[INFO] [stdout]   --> src/enum.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let four = Ipaddrtype::V4;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_four`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `six`
[INFO] [stdout]   --> src/enum.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let six = Ipaddrtype::V6;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_six`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `Ipaddr6`
[INFO] [stdout]   --> src/enum.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let Ipaddr6 = Ipaddr {
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Ipaddr6`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `call`
[INFO] [stdout]   --> src/enum.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let call = Ipaddr4.iptype.call();
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_call`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `Ipaddri`
[INFO] [stdout]   --> src/enum.rs:59:14
[INFO] [stdout]    |
[INFO] [stdout] 59 |         Some(Ipaddri) => Some(a.unwrap() + 1),
[INFO] [stdout]    |              ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Ipaddri`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `row`
[INFO] [stdout]   --> src/vector.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let row=vec![
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_row`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hashmap`
[INFO] [stdout]  --> src/hashmap.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let hashmap: HashMap<_, _> = teams.iter().zip(scores.iter()).collect();
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_hashmap`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/result_enum.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut array = vec![1, 20, 3, 4, 0];
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/result_enum.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let mut array = vec![10, 20, 30, 4, 100];
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/result_enum.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let mut array = vec![String::from("hello"),String::from("world")];
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/result_enum.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let f = File::open("hello.txt").unwrap_or_else(|error| {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/result_enum.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 56 |     let f = match f {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `importantExcerpt`
[INFO] [stdout]   --> src/life_time.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let importantExcerpt = ImportantExcerpt {
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_importantExcerpt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]    --> src/function_closures.rs:126:9
[INFO] [stdout]     |
[INFO] [stdout] 126 |     let s = example_closure(String::from("hello"));
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_two` is never used
[INFO] [stdout]    --> src/struct.rs:108:8
[INFO] [stdout]     |
[INFO] [stdout] 108 | pub fn add_two(a: i32) -> i32 {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `greeting` is never used
[INFO] [stdout]    --> src/struct.rs:112:8
[INFO] [stdout]     |
[INFO] [stdout] 112 | pub fn greeting(name: &str) -> String {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, `2`, and `3` are never read
[INFO] [stdout]  --> src/enum.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 |     V4(i8, i8, i8, i8),
[INFO] [stdout]   |     -- ^^  ^^  ^^  ^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     fields in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Ipaddrtype` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[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] 4 -     V4(i8, i8, i8, i8),
[INFO] [stdout] 4 +     V4((), (), (), ()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/enum.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 |     V6(String),
[INFO] [stdout]   |     -- ^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Ipaddrtype` 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] 5 -     V6(String),
[INFO] [stdout] 5 +     V6(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `address` is never read
[INFO] [stdout]   --> src/enum.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Ipaddr {
[INFO] [stdout]    |        ------ field in this struct
[INFO] [stdout] 14 |     iptype: Ipaddrtype,
[INFO] [stdout] 15 |     address: String,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Ipaddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `SpreadsheetCell` is never used
[INFO] [stdout]   --> src/vector.rs:37:6
[INFO] [stdout]    |
[INFO] [stdout] 37 | enum SpreadsheetCell{
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `vector_enum` is never used
[INFO] [stdout]   --> src/vector.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub fn vector_enum() {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `mix` is never used
[INFO] [stdout]   --> src/generic.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl<T: Display, U: Debug> Point<T, U> {
[INFO] [stdout]    | -------------------------------------- method in this implementation
[INFO] [stdout] 19 |     fn mix<V, W>(self, other: Point<V, W>) -> Point<T, W> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `part` is never read
[INFO] [stdout]   --> src/life_time.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 39 | struct ImportantExcerpt<'a> {
[INFO] [stdout]    |        ---------------- field in this struct
[INFO] [stdout] 40 |     part: &'a str,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `level` and `announce_and_return_part` are never used
[INFO] [stdout]   --> src/life_time.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | impl<'a> ImportantExcerpt<'a> {
[INFO] [stdout]    | ----------------------------- methods in this implementation
[INFO] [stdout] 45 |     fn level(&self) -> i32 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |     fn announce_and_return_part(&self, announcement: &str) -> &str {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest_with_an_announcement` is never used
[INFO] [stdout]   --> src/life_time.rs:69:4
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn longest_with_an_announcement<'a, T>(
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/accepting_command_line_arguments.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn main() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/accepting_command_line_arguments.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn run(config: Config) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Config` is never constructed
[INFO] [stdout]   --> src/accepting_command_line_arguments.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | struct Config {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/accepting_command_line_arguments.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 47 | impl Config {
[INFO] [stdout]    | ----------- associated function in this implementation
[INFO] [stdout] 48 |     // fn new(args: &[String]) -> Result<Config, &'static str> {
[INFO] [stdout] 49 |     fn new(mut args: std::env::Args) -> Result<Config, &'static str> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `search` is never used
[INFO] [stdout]   --> src/accepting_command_line_arguments.rs:82:8
[INFO] [stdout]    |
[INFO] [stdout] 82 | pub fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `search_case_insensitive` is never used
[INFO] [stdout]   --> src/accepting_command_line_arguments.rs:95:8
[INFO] [stdout]    |
[INFO] [stdout] 95 | pub fn search_case_insensitive<'a>(
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]    --> src/function_closures.rs:176:8
[INFO] [stdout]     |
[INFO] [stdout] 176 | struct Rectangle {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sort_by_key` is never used
[INFO] [stdout]    --> src/function_closures.rs:181:8
[INFO] [stdout]     |
[INFO] [stdout] 181 | pub fn sort_by_key() {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `produce_new_iterators` is never used
[INFO] [stdout]    --> src/function_closures.rs:272:8
[INFO] [stdout]     |
[INFO] [stdout] 272 | pub fn produce_new_iterators() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Counter` is never constructed
[INFO] [stdout]    --> src/function_closures.rs:282:8
[INFO] [stdout]     |
[INFO] [stdout] 282 | struct Counter {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/function_closures.rs:287:8
[INFO] [stdout]     |
[INFO] [stdout] 286 | impl Counter {
[INFO] [stdout]     | ------------ associated function in this implementation
[INFO] [stdout] 287 |     fn new() -> Counter {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Ipaddr4` should have a snake case name
[INFO] [stdout]   --> src/enum.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let Ipaddr4 = Ipaddr {
[INFO] [stdout]    |         ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `ipaddr4`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Ipaddr6` should have a snake case name
[INFO] [stdout]   --> src/enum.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let Ipaddr6 = Ipaddr {
[INFO] [stdout]    |         ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `ipaddr6`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Ipaddri` should have a snake case name
[INFO] [stdout]   --> src/enum.rs:59:14
[INFO] [stdout]    |
[INFO] [stdout] 59 |         Some(Ipaddri) => Some(a.unwrap() + 1),
[INFO] [stdout]    |              ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `ipaddri`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/result_enum.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     read_username_from_file();
[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] 16 |     let _ = read_username_from_file();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `importantExcerpt` should have a snake case name
[INFO] [stdout]   --> src/life_time.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let importantExcerpt = ImportantExcerpt {
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `important_excerpt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rust_project_demo`
[INFO] [stdout]  --> tests/integration_test.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rust_project_demo;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item2`
[INFO] [stdout]   --> src/lib.rs:53:32
[INFO] [stdout]    |
[INFO] [stdout] 53 | pub fn notify3<T, U>(item1: T, item2: U)
[INFO] [stdout]    |                                ^^^^^ help: if this is intentional, prefix it with an underscore: `_item2`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rust_project_demo`
[INFO] [stdout]  --> tests/another_integration_test.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rust_project_demo;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]   --> tests/result_test.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub struct Guess {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 27 |     value: i32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::format`
[INFO] [stdout]  --> src/string.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::format;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::error::Error`
[INFO] [stdout]  --> src/result_enum.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::error::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rust_project_demo::Summary`
[INFO] [stdout]   --> src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | use rust_project_demo::Summary;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `array`
[INFO] [stdout]  --> src/array_type.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let array: [i32; 5] = [1, 2, 3, 4, 5];
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_array`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `var`
[INFO] [stdout]   --> src/stack_heap.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let var = 5;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_var`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/stack_heap.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let y = x;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/reference_borrowing.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let mut s = String::from("hello");
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]   --> src/struct.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let res=Rectangle::square(20);
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/struct.rs:112:17
[INFO] [stdout]     |
[INFO] [stdout] 112 | pub fn greeting(name: &str) -> String {
[INFO] [stdout]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `four`
[INFO] [stdout]   --> src/enum.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let four = Ipaddrtype::V4;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_four`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `six`
[INFO] [stdout]   --> src/enum.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let six = Ipaddrtype::V6;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_six`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `Ipaddr6`
[INFO] [stdout]   --> src/enum.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let Ipaddr6 = Ipaddr {
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Ipaddr6`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `call`
[INFO] [stdout]   --> src/enum.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let call = Ipaddr4.iptype.call();
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_call`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `Ipaddri`
[INFO] [stdout]   --> src/enum.rs:59:14
[INFO] [stdout]    |
[INFO] [stdout] 59 |         Some(Ipaddri) => Some(a.unwrap() + 1),
[INFO] [stdout]    |              ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Ipaddri`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `row`
[INFO] [stdout]   --> src/vector.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let row=vec![
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_row`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hashmap`
[INFO] [stdout]  --> src/hashmap.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let hashmap: HashMap<_, _> = teams.iter().zip(scores.iter()).collect();
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_hashmap`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/result_enum.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut array = vec![1, 20, 3, 4, 0];
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/result_enum.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let mut array = vec![10, 20, 30, 4, 100];
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/result_enum.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let mut array = vec![String::from("hello"),String::from("world")];
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/result_enum.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let f = File::open("hello.txt").unwrap_or_else(|error| {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/result_enum.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 56 |     let f = match f {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `importantExcerpt`
[INFO] [stdout]   --> src/life_time.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let importantExcerpt = ImportantExcerpt {
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_importantExcerpt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]    --> src/function_closures.rs:126:9
[INFO] [stdout]     |
[INFO] [stdout] 126 |     let s = example_closure(String::from("hello"));
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, `2`, and `3` are never read
[INFO] [stdout]  --> src/enum.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 |     V4(i8, i8, i8, i8),
[INFO] [stdout]   |     -- ^^  ^^  ^^  ^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     fields in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Ipaddrtype` 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] 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] 4 -     V4(i8, i8, i8, i8),
[INFO] [stdout] 4 +     V4((), (), (), ()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/enum.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 |     V6(String),
[INFO] [stdout]   |     -- ^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Ipaddrtype` 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] 5 -     V6(String),
[INFO] [stdout] 5 +     V6(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `address` is never read
[INFO] [stdout]   --> src/enum.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Ipaddr {
[INFO] [stdout]    |        ------ field in this struct
[INFO] [stdout] 14 |     iptype: Ipaddrtype,
[INFO] [stdout] 15 |     address: String,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Ipaddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `SpreadsheetCell` is never used
[INFO] [stdout]   --> src/vector.rs:37:6
[INFO] [stdout]    |
[INFO] [stdout] 37 | enum SpreadsheetCell{
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `vector_enum` is never used
[INFO] [stdout]   --> src/vector.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub fn vector_enum() {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `mix` is never used
[INFO] [stdout]   --> src/generic.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl<T: Display, U: Debug> Point<T, U> {
[INFO] [stdout]    | -------------------------------------- method in this implementation
[INFO] [stdout] 19 |     fn mix<V, W>(self, other: Point<V, W>) -> Point<T, W> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `part` is never read
[INFO] [stdout]   --> src/life_time.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 39 | struct ImportantExcerpt<'a> {
[INFO] [stdout]    |        ---------------- field in this struct
[INFO] [stdout] 40 |     part: &'a str,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `level` and `announce_and_return_part` are never used
[INFO] [stdout]   --> src/life_time.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | impl<'a> ImportantExcerpt<'a> {
[INFO] [stdout]    | ----------------------------- methods in this implementation
[INFO] [stdout] 45 |     fn level(&self) -> i32 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |     fn announce_and_return_part(&self, announcement: &str) -> &str {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest_with_an_announcement` is never used
[INFO] [stdout]   --> src/life_time.rs:69:4
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn longest_with_an_announcement<'a, T>(
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/accepting_command_line_arguments.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn main() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/accepting_command_line_arguments.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn run(config: Config) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Config` is never constructed
[INFO] [stdout]   --> src/accepting_command_line_arguments.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | struct Config {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/accepting_command_line_arguments.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 47 | impl Config {
[INFO] [stdout]    | ----------- associated function in this implementation
[INFO] [stdout] 48 |     // fn new(args: &[String]) -> Result<Config, &'static str> {
[INFO] [stdout] 49 |     fn new(mut args: std::env::Args) -> Result<Config, &'static str> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `search_case_insensitive` is never used
[INFO] [stdout]   --> src/accepting_command_line_arguments.rs:95:8
[INFO] [stdout]    |
[INFO] [stdout] 95 | pub fn search_case_insensitive<'a>(
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]    --> src/function_closures.rs:176:8
[INFO] [stdout]     |
[INFO] [stdout] 176 | struct Rectangle {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sort_by_key` is never used
[INFO] [stdout]    --> src/function_closures.rs:181:8
[INFO] [stdout]     |
[INFO] [stdout] 181 | pub fn sort_by_key() {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `produce_new_iterators` is never used
[INFO] [stdout]    --> src/function_closures.rs:272:8
[INFO] [stdout]     |
[INFO] [stdout] 272 | pub fn produce_new_iterators() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `use_iterators` is never used
[INFO] [stdout]    --> src/function_closures.rs:207:12
[INFO] [stdout]     |
[INFO] [stdout] 207 |     pub fn use_iterators() {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Ipaddr4` should have a snake case name
[INFO] [stdout]   --> src/enum.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let Ipaddr4 = Ipaddr {
[INFO] [stdout]    |         ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `ipaddr4`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Ipaddr6` should have a snake case name
[INFO] [stdout]   --> src/enum.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let Ipaddr6 = Ipaddr {
[INFO] [stdout]    |         ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `ipaddr6`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Ipaddri` should have a snake case name
[INFO] [stdout]   --> src/enum.rs:59:14
[INFO] [stdout]    |
[INFO] [stdout] 59 |         Some(Ipaddri) => Some(a.unwrap() + 1),
[INFO] [stdout]    |              ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `ipaddri`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/result_enum.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     read_username_from_file();
[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] 16 |     let _ = read_username_from_file();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `importantExcerpt` should have a snake case name
[INFO] [stdout]   --> src/life_time.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let importantExcerpt = ImportantExcerpt {
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `important_excerpt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [optimized + debuginfo] target(s) in 1.09s
[INFO] running `Command { std: "docker" "inspect" "a70fd1024333ac2ffe0cbcd6675e3e46c58157b4b9eaf98c55d474df2f5c3169", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a70fd1024333ac2ffe0cbcd6675e3e46c58157b4b9eaf98c55d474df2f5c3169", kill_on_drop: false }`
[INFO] [stdout] a70fd1024333ac2ffe0cbcd6675e3e46c58157b4b9eaf98c55d474df2f5c3169
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 8078a3f169a81038886d832aea4605587e634929100b74ea2dbb01b70d13b810
[INFO] running `Command { std: "docker" "start" "-a" "8078a3f169a81038886d832aea4605587e634929100b74ea2dbb01b70d13b810", kill_on_drop: false }`
[INFO] [stderr] warning: rust_project_demo v0.1.0 (/opt/rustwide/workdir) ignoring invalid dependency `rust_tutorials` which is missing a lib target
[INFO] [stderr] warning: unused variable: `item2`
[INFO] [stderr]   --> src/lib.rs:53:32
[INFO] [stderr]    |
[INFO] [stderr] 53 | pub fn notify3<T, U>(item1: T, item2: U)
[INFO] [stderr]    |                                ^^^^^ help: if this is intentional, prefix it with an underscore: `_item2`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_project_demo` (lib) generated 1 warning (run `cargo fix --lib -p rust_project_demo` to apply 1 suggestion)
[INFO] [stderr] warning: `rust_project_demo` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr] warning: unused import: `std::fmt::format`
[INFO] [stderr]  --> src/string.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fmt::format;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::error::Error`
[INFO] [stderr]  --> src/result_enum.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::error::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rust_project_demo::Summary`
[INFO] [stderr]   --> src/main.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 | use rust_project_demo::Summary;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `array`
[INFO] [stderr]  --> src/array_type.rs:4:9
[INFO] [stderr]   |
[INFO] [stderr] 4 |     let array: [i32; 5] = [1, 2, 3, 4, 5];
[INFO] [stderr]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_array`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `var`
[INFO] [stderr]   --> src/stack_heap.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 |     let var = 5;
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_var`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `y`
[INFO] [stderr]   --> src/stack_heap.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |     let y = x;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/reference_borrowing.rs:34:9
[INFO] [stderr]    |
[INFO] [stderr] 34 |     let mut s = String::from("hello");
[INFO] [stderr]    |         ----^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `res`
[INFO] [stderr]   --> src/struct.rs:54:9
[INFO] [stderr]    |
[INFO] [stderr] 54 |     let res=Rectangle::square(20);
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `name`
[INFO] [stderr]    --> src/struct.rs:112:17
[INFO] [stderr]     |
[INFO] [stderr] 112 | pub fn greeting(name: &str) -> String {
[INFO] [stderr]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `four`
[INFO] [stderr]   --> src/enum.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |     let four = Ipaddrtype::V4;
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_four`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `six`
[INFO] [stderr]   --> src/enum.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let six = Ipaddrtype::V6;
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_six`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `Ipaddr6`
[INFO] [stderr]   --> src/enum.rs:27:9
[INFO] [stderr]    |
[INFO] [stderr] 27 |     let Ipaddr6 = Ipaddr {
[INFO] [stderr]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Ipaddr6`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `call`
[INFO] [stderr]   --> src/enum.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let call = Ipaddr4.iptype.call();
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_call`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `Ipaddri`
[INFO] [stderr]   --> src/enum.rs:59:14
[INFO] [stderr]    |
[INFO] [stderr] 59 |         Some(Ipaddri) => Some(a.unwrap() + 1),
[INFO] [stderr]    |              ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Ipaddri`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `row`
[INFO] [stderr]   --> src/vector.rs:44:9
[INFO] [stderr]    |
[INFO] [stderr] 44 |     let row=vec![
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_row`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `hashmap`
[INFO] [stderr]  --> src/hashmap.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let hashmap: HashMap<_, _> = teams.iter().zip(scores.iter()).collect();
[INFO] [stderr]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_hashmap`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/result_enum.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let mut array = vec![1, 20, 3, 4, 0];
[INFO] [stderr]    |         ----^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/result_enum.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let mut array = vec![10, 20, 30, 4, 100];
[INFO] [stderr]    |         ----^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/result_enum.rs:26:9
[INFO] [stderr]    |
[INFO] [stderr] 26 |     let mut array = vec![String::from("hello"),String::from("world")];
[INFO] [stderr]    |         ----^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/result_enum.rs:43:9
[INFO] [stderr]    |
[INFO] [stderr] 43 |     let f = File::open("hello.txt").unwrap_or_else(|error| {
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/result_enum.rs:56:9
[INFO] [stderr]    |
[INFO] [stderr] 56 |     let f = match f {
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `importantExcerpt`
[INFO] [stderr]   --> src/life_time.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let importantExcerpt = ImportantExcerpt {
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_importantExcerpt`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]    --> src/function_closures.rs:126:9
[INFO] [stderr]     |
[INFO] [stderr] 126 |     let s = example_closure(String::from("hello"));
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: fields `0`, `1`, `2`, and `3` are never read
[INFO] [stderr]  --> src/enum.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 |     V4(i8, i8, i8, i8),
[INFO] [stderr]   |     -- ^^  ^^  ^^  ^^
[INFO] [stderr]   |     |
[INFO] [stderr]   |     fields in this variant
[INFO] [stderr]   |
[INFO] [stderr]   = note: `Ipaddrtype` 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] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stderr]   |
[INFO] [stderr] 4 -     V4(i8, i8, i8, i8),
[INFO] [stderr] 4 +     V4((), (), (), ()),
[INFO] [stderr]   |
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]  --> src/enum.rs:5:8
[INFO] [stderr]   |
[INFO] [stderr] 5 |     V6(String),
[INFO] [stderr]   |     -- ^^^^^^
[INFO] [stderr]   |     |
[INFO] [stderr]   |     field in this variant
[INFO] [stderr]   |
[INFO] [stderr]   = note: `Ipaddrtype` 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] 5 -     V6(String),
[INFO] [stderr] 5 +     V6(()),
[INFO] [stderr]   |
[INFO] [stderr] 
[INFO] [stderr] warning: field `address` is never read
[INFO] [stderr]   --> src/enum.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 13 | struct Ipaddr {
[INFO] [stderr]    |        ------ field in this struct
[INFO] [stderr] 14 |     iptype: Ipaddrtype,
[INFO] [stderr] 15 |     address: String,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Ipaddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: enum `SpreadsheetCell` is never used
[INFO] [stderr]   --> src/vector.rs:37:6
[INFO] [stderr]    |
[INFO] [stderr] 37 | enum SpreadsheetCell{
[INFO] [stderr]    |      ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `vector_enum` is never used
[INFO] [stderr]   --> src/vector.rs:43:8
[INFO] [stderr]    |
[INFO] [stderr] 43 | pub fn vector_enum() {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `mix` is never used
[INFO] [stderr]   --> src/generic.rs:19:8
[INFO] [stderr]    |
[INFO] [stderr] 18 | impl<T: Display, U: Debug> Point<T, U> {
[INFO] [stderr]    | -------------------------------------- method in this implementation
[INFO] [stderr] 19 |     fn mix<V, W>(self, other: Point<V, W>) -> Point<T, W> {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `part` is never read
[INFO] [stderr]   --> src/life_time.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 39 | struct ImportantExcerpt<'a> {
[INFO] [stderr]    |        ---------------- field in this struct
[INFO] [stderr] 40 |     part: &'a str,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: methods `level` and `announce_and_return_part` are never used
[INFO] [stderr]   --> src/life_time.rs:45:8
[INFO] [stderr]    |
[INFO] [stderr] 44 | impl<'a> ImportantExcerpt<'a> {
[INFO] [stderr]    | ----------------------------- methods in this implementation
[INFO] [stderr] 45 |     fn level(&self) -> i32 {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 49 |     fn announce_and_return_part(&self, announcement: &str) -> &str {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `longest_with_an_announcement` is never used
[INFO] [stderr]   --> src/life_time.rs:69:4
[INFO] [stderr]    |
[INFO] [stderr] 69 | fn longest_with_an_announcement<'a, T>(
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `main` is never used
[INFO] [stderr]  --> src/accepting_command_line_arguments.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn main() {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/accepting_command_line_arguments.rs:26:4
[INFO] [stderr]    |
[INFO] [stderr] 26 | fn run(config: Config) -> Result<(), Box<dyn Error>> {
[INFO] [stderr]    |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Config` is never constructed
[INFO] [stderr]   --> src/accepting_command_line_arguments.rs:41:8
[INFO] [stderr]    |
[INFO] [stderr] 41 | struct Config {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/accepting_command_line_arguments.rs:49:8
[INFO] [stderr]    |
[INFO] [stderr] 47 | impl Config {
[INFO] [stderr]    | ----------- associated function in this implementation
[INFO] [stderr] 48 |     // fn new(args: &[String]) -> Result<Config, &'static str> {
[INFO] [stderr] 49 |     fn new(mut args: std::env::Args) -> Result<Config, &'static str> {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `search_case_insensitive` is never used
[INFO] [stderr]   --> src/accepting_command_line_arguments.rs:95:8
[INFO] [stderr]    |
[INFO] [stderr] 95 | pub fn search_case_insensitive<'a>(
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Rectangle` is never constructed
[INFO] [stderr]    --> src/function_closures.rs:176:8
[INFO] [stderr]     |
[INFO] [stderr] 176 | struct Rectangle {
[INFO] [stderr]     |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `sort_by_key` is never used
[INFO] [stderr]    --> src/function_closures.rs:181:8
[INFO] [stderr]     |
[INFO] [stderr] 181 | pub fn sort_by_key() {
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `produce_new_iterators` is never used
[INFO] [stderr]    --> src/function_closures.rs:272:8
[INFO] [stderr]     |
[INFO] [stderr] 272 | pub fn produce_new_iterators() {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `use_iterators` is never used
[INFO] [stderr]    --> src/function_closures.rs:207:12
[INFO] [stderr]     |
[INFO] [stderr] 207 |     pub fn use_iterators() {
[INFO] [stderr]     |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable `Ipaddr4` should have a snake case name
[INFO] [stderr]   --> src/enum.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let Ipaddr4 = Ipaddr {
[INFO] [stderr]    |         ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `ipaddr4`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `Ipaddr6` should have a snake case name
[INFO] [stderr]   --> src/enum.rs:27:9
[INFO] [stderr]    |
[INFO] [stderr] 27 |     let Ipaddr6 = Ipaddr {
[INFO] [stderr]    |         ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `ipaddr6`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `Ipaddri` should have a snake case name
[INFO] [stderr]   --> src/enum.rs:59:14
[INFO] [stderr]    |
[INFO] [stderr] 59 |         Some(Ipaddri) => Some(a.unwrap() + 1),
[INFO] [stderr]    |              ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `ipaddri`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/result_enum.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     read_username_from_file();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let _ = read_username_from_file();
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: variable `importantExcerpt` should have a snake case name
[INFO] [stderr]   --> src/life_time.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let importantExcerpt = ImportantExcerpt {
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `important_excerpt`
[INFO] [stderr] 
[INFO] [stderr] warning: function `add_two` is never used
[INFO] [stderr]    --> src/struct.rs:108:8
[INFO] [stderr]     |
[INFO] [stderr] 108 | pub fn add_two(a: i32) -> i32 {
[INFO] [stderr]     |        ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `greeting` is never used
[INFO] [stderr]    --> src/struct.rs:112:8
[INFO] [stderr]     |
[INFO] [stderr] 112 | pub fn greeting(name: &str) -> String {
[INFO] [stderr]     |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: fields `0`, `1`, `2`, and `3` are never read
[INFO] [stderr]  --> src/enum.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 |     V4(i8, i8, i8, i8),
[INFO] [stderr]   |     -- ^^  ^^  ^^  ^^
[INFO] [stderr]   |     |
[INFO] [stderr]   |     fields in this variant
[INFO] [stderr]   |
[INFO] [stderr]   = note: `Ipaddrtype` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stderr]   |
[INFO] [stderr] 4 -     V4(i8, i8, i8, i8),
[INFO] [stderr] 4 +     V4((), (), (), ()),
[INFO] [stderr]   |
[INFO] [stderr] 
[INFO] [stderr] warning: function `search` is never used
[INFO] [stderr]   --> src/accepting_command_line_arguments.rs:82:8
[INFO] [stderr]    |
[INFO] [stderr] 82 | pub fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Counter` is never constructed
[INFO] [stderr]    --> src/function_closures.rs:282:8
[INFO] [stderr]     |
[INFO] [stderr] 282 | struct Counter {
[INFO] [stderr]     |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]    --> src/function_closures.rs:287:8
[INFO] [stderr]     |
[INFO] [stderr] 286 | impl Counter {
[INFO] [stderr]     | ------------ associated function in this implementation
[INFO] [stderr] 287 |     fn new() -> Counter {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `value` is never read
[INFO] [stderr]   --> tests/result_test.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 26 | pub struct Guess {
[INFO] [stderr]    |            ----- field in this struct
[INFO] [stderr] 27 |     value: i32,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rust_project_demo`
[INFO] [stderr]  --> tests/another_integration_test.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use rust_project_demo;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rust_project_demo`
[INFO] [stderr]  --> tests/integration_test.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use rust_project_demo;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_project_demo` (bin "rust_project_demo" test) generated 46 warnings (run `cargo fix --bin "rust_project_demo" -p rust_project_demo --tests` to apply 23 suggestions)
[INFO] [stderr] warning: `rust_project_demo` (bin "rust_project_demo") generated 50 warnings (44 duplicates)
[INFO] [stderr] warning: `rust_project_demo` (test "result_test") generated 1 warning
[INFO] [stderr] warning: `rust_project_demo` (test "another_integration_test") generated 1 warning (run `cargo fix --test "another_integration_test" -p rust_project_demo` to apply 1 suggestion)
[INFO] [stderr] warning: `rust_project_demo` (test "integration_test") generated 1 warning (run `cargo fix --test "integration_test" -p rust_project_demo` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [optimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rust_project_demo-e3a6752956b0d1ab)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_project_demo-29334d97419ab563)
[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] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stdout] test accepting_command_line_arguments::tests::one_result ... ok
[INFO] [stdout] test function_closures::tests::consumer_iterator ... ok
[INFO] [stdout] test function_closures::tests::iterator_demonstration ... ok
[INFO] [stdout] test function_closures::tests::call_with_different_vaules ... ok
[INFO] [stdout] test function_closures::tests::using_iterator_trait_method ... ok
[INFO] [stdout] test function_closures::tests::iterator_sum ... ok
[INFO] [stdout] test r#struct::tests::it_adds_two ... ok
[INFO] [stdout] test r#struct::tests::larger_can_hold_smaller ... ignored
[INFO] [stdout] test r#struct::tests::it_works ... ok
[INFO] [stderr] error: test failed, to rerun pass `--bin rust_project_demo`
[INFO] [stdout] test r#struct::tests::another ... FAILED
[INFO] [stdout] test r#struct::tests::greeting_contains_name ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- r#struct::tests::another stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'r#struct::tests::another' (24) panicked at src/struct.rs:69:9:
[INFO] [stdout] Make this test fail
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x614dc0759f4a - std[128c3efe2914e152]::backtrace_rs::backtrace::libunwind::trace
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x614dc0759f4a - std[128c3efe2914e152]::backtrace_rs::backtrace::trace_unsynchronized::<std[128c3efe2914e152]::sys::backtrace::_print_fmt::{closure#1}>
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x614dc0759f4a - std[128c3efe2914e152]::sys::backtrace::_print_fmt
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/sys/backtrace.rs:74:9
[INFO] [stdout]    3:     0x614dc0759f4a - <<std[128c3efe2914e152]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[6771d259883166e6]::fmt::Display>::fmt
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/sys/backtrace.rs:44:26
[INFO] [stdout]    4:     0x614dc076dbba - <core[6771d259883166e6]::fmt::rt::Argument>::fmt
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/core/src/fmt/rt.rs:152:76
[INFO] [stdout]    5:     0x614dc076dbba - core[6771d259883166e6]::fmt::write
[INFO] [stdout]    6:     0x614dc075e7c2 - std[128c3efe2914e152]::io::default_write_fmt::<alloc[fef50e8eecedd288]::vec::Vec<u8>>
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/io/mod.rs:621:11
[INFO] [stdout]    7:     0x614dc075e7c2 - <alloc[fef50e8eecedd288]::vec::Vec<u8> as std[128c3efe2914e152]::io::Write>::write_fmt
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/io/mod.rs:1976:13
[INFO] [stdout]    8:     0x614dc07390df - <std[128c3efe2914e152]::sys::backtrace::BacktraceLock>::print
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/sys/backtrace.rs:47:9
[INFO] [stdout]    9:     0x614dc07390df - std[128c3efe2914e152]::panicking::default_hook::{closure#0}
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panicking.rs:292:27
[INFO] [stdout]   10:     0x614dc07523a9 - std[128c3efe2914e152]::panicking::default_hook
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panicking.rs:316:9
[INFO] [stdout]   11:     0x614dc06ef63c - <alloc[fef50e8eecedd288]::boxed::Box<dyn for<'a, 'b> core[6771d259883166e6]::ops::function::Fn<(&'a std[128c3efe2914e152]::panic::PanicHookInfo<'b>,), Output = ()> + core[6771d259883166e6]::marker::Sync + core[6771d259883166e6]::marker::Send> as core[6771d259883166e6]::ops::function::Fn<(&std[128c3efe2914e152]::panic::PanicHookInfo,)>>::call
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/alloc/src/boxed.rs:2263:9
[INFO] [stdout]   12:     0x614dc06ef63c - test[b137923399915ecf]::test_main_with_exit_callback::<test[b137923399915ecf]::test_main::{closure#0}>::{closure#0}
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x614dc0752562 - <alloc[fef50e8eecedd288]::boxed::Box<dyn for<'a, 'b> core[6771d259883166e6]::ops::function::Fn<(&'a std[128c3efe2914e152]::panic::PanicHookInfo<'b>,), Output = ()> + core[6771d259883166e6]::marker::Sync + core[6771d259883166e6]::marker::Send> as core[6771d259883166e6]::ops::function::Fn<(&std[128c3efe2914e152]::panic::PanicHookInfo,)>>::call
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/alloc/src/boxed.rs:2263:9
[INFO] [stdout]   14:     0x614dc0752562 - std[128c3efe2914e152]::panicking::panic_with_hook
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panicking.rs:833:13
[INFO] [stdout]   15:     0x614dc07391ca - std[128c3efe2914e152]::panicking::panic_handler::{closure#0}
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panicking.rs:691:13
[INFO] [stdout]   16:     0x614dc072e3a9 - std[128c3efe2914e152]::sys::backtrace::__rust_end_short_backtrace::<std[128c3efe2914e152]::panicking::panic_handler::{closure#0}, !>
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/sys/backtrace.rs:182:18
[INFO] [stdout]   17:     0x614dc0739ead - __rustc[752cc74e29381ccc]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panicking.rs:689:5
[INFO] [stdout]   18:     0x614dc076e2ac - core[6771d259883166e6]::panicking::panic_fmt
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/core/src/panicking.rs:80:14
[INFO] [stdout]   19:     0x614dc06e342a - rust_project_demo::struct::tests::another::h8f317bc40111340a
[INFO] [stdout]                                at /opt/rustwide/workdir/src/struct.rs:69:9
[INFO] [stdout]   20:     0x614dc06e1866 - rust_project_demo::struct::tests::another::{{closure}}::h3d1008dfc3243264
[INFO] [stdout]                                at /opt/rustwide/workdir/src/struct.rs:68:17
[INFO] [stdout]   21:     0x614dc06e1866 - core::ops::function::FnOnce::call_once::h4f0b3c305abd55d5
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   22:     0x614dc06e373b - <fn() -> core[6771d259883166e6]::result::Result<(), alloc[fef50e8eecedd288]::string::String> as core[6771d259883166e6]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x614dc06e373b - test[b137923399915ecf]::__rust_begin_short_backtrace::<core[6771d259883166e6]::result::Result<(), alloc[fef50e8eecedd288]::string::String>, fn() -> core[6771d259883166e6]::result::Result<(), alloc[fef50e8eecedd288]::string::String>>
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/test/src/lib.rs:663:18
[INFO] [stdout]   24:     0x614dc06f010b - test[b137923399915ecf]::run_test_in_process::{closure#0}
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/test/src/lib.rs:686:74
[INFO] [stdout]   25:     0x614dc06f010b - <core[6771d259883166e6]::panic::unwind_safe::AssertUnwindSafe<test[b137923399915ecf]::run_test_in_process::{closure#0}> as core[6771d259883166e6]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/core/src/panic/unwind_safe.rs:275:9
[INFO] [stdout]   26:     0x614dc06f010b - std[128c3efe2914e152]::panicking::catch_unwind::do_call::<core[6771d259883166e6]::panic::unwind_safe::AssertUnwindSafe<test[b137923399915ecf]::run_test_in_process::{closure#0}>, core[6771d259883166e6]::result::Result<(), alloc[fef50e8eecedd288]::string::String>>
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panicking.rs:581:40
[INFO] [stdout]   27:     0x614dc06f010b - std[128c3efe2914e152]::panicking::catch_unwind::<core[6771d259883166e6]::result::Result<(), alloc[fef50e8eecedd288]::string::String>, core[6771d259883166e6]::panic::unwind_safe::AssertUnwindSafe<test[b137923399915ecf]::run_test_in_process::{closure#0}>>
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panicking.rs:544:19
[INFO] [stdout]   28:     0x614dc06f010b - std[128c3efe2914e152]::panic::catch_unwind::<core[6771d259883166e6]::panic::unwind_safe::AssertUnwindSafe<test[b137923399915ecf]::run_test_in_process::{closure#0}>, core[6771d259883166e6]::result::Result<(), alloc[fef50e8eecedd288]::string::String>>
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panic.rs:359:14
[INFO] [stdout]   29:     0x614dc06f010b - test[b137923399915ecf]::run_test_in_process
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/test/src/lib.rs:686:27
[INFO] [stdout]   30:     0x614dc06f010b - test[b137923399915ecf]::run_test::{closure#0}
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/test/src/lib.rs:607:43
[INFO] [stdout]   31:     0x614dc06ea564 - test[b137923399915ecf]::run_test::{closure#1}
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/test/src/lib.rs:637:41
[INFO] [stdout]   32:     0x614dc06ea564 - std[128c3efe2914e152]::sys::backtrace::__rust_begin_short_backtrace::<test[b137923399915ecf]::run_test::{closure#1}, ()>
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/sys/backtrace.rs:166:18
[INFO] [stdout]   33:     0x614dc06f2d12 - std[128c3efe2914e152]::thread::lifecycle::spawn_unchecked::<test[b137923399915ecf]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/thread/lifecycle.rs:91:13
[INFO] [stdout]   34:     0x614dc06f2d12 - <core[6771d259883166e6]::panic::unwind_safe::AssertUnwindSafe<std[128c3efe2914e152]::thread::lifecycle::spawn_unchecked<test[b137923399915ecf]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}> as core[6771d259883166e6]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/core/src/panic/unwind_safe.rs:275:9
[INFO] [stdout]   35:     0x614dc06f2d12 - std[128c3efe2914e152]::panicking::catch_unwind::do_call::<core[6771d259883166e6]::panic::unwind_safe::AssertUnwindSafe<std[128c3efe2914e152]::thread::lifecycle::spawn_unchecked<test[b137923399915ecf]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panicking.rs:581:40
[INFO] [stdout]   36:     0x614dc06f2d12 - std[128c3efe2914e152]::panicking::catch_unwind::<(), core[6771d259883166e6]::panic::unwind_safe::AssertUnwindSafe<std[128c3efe2914e152]::thread::lifecycle::spawn_unchecked<test[b137923399915ecf]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>>
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panicking.rs:544:19
[INFO] [stdout]   37:     0x614dc06f2d12 - std[128c3efe2914e152]::panic::catch_unwind::<core[6771d259883166e6]::panic::unwind_safe::AssertUnwindSafe<std[128c3efe2914e152]::thread::lifecycle::spawn_unchecked<test[b137923399915ecf]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panic.rs:359:14
[INFO] [stdout]   38:     0x614dc06f2d12 - std[128c3efe2914e152]::thread::lifecycle::spawn_unchecked::<test[b137923399915ecf]::run_test::{closure#1}, ()>::{closure#1}
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/thread/lifecycle.rs:89:26
[INFO] [stdout]   39:     0x614dc06f2d12 - <std[128c3efe2914e152]::thread::lifecycle::spawn_unchecked<test[b137923399915ecf]::run_test::{closure#1}, ()>::{closure#1} as core[6771d259883166e6]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   40:     0x614dc075985f - <alloc[fef50e8eecedd288]::boxed::Box<dyn core[6771d259883166e6]::ops::function::FnOnce<(), Output = ()> + core[6771d259883166e6]::marker::Send> as core[6771d259883166e6]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/alloc/src/boxed.rs:2249:9
[INFO] [stdout]   41:     0x614dc075985f - <std[128c3efe2914e152]::sys::thread::unix::Thread>::new::thread_start
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/sys/thread/unix.rs:118:17
[INFO] [stdout]   42:     0x79bf1a107aa4 - <unknown>
[INFO] [stdout]   43:     0x79bf1a194a64 - clone
[INFO] [stdout]   44:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- r#struct::tests::greeting_contains_name stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'r#struct::tests::greeting_contains_name' (25) panicked at src/struct.rs:100:9:
[INFO] [stdout] Greeting did not contain name, value was `Hello!`
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x614dc0759f4a - std[128c3efe2914e152]::backtrace_rs::backtrace::libunwind::trace
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x614dc0759f4a - std[128c3efe2914e152]::backtrace_rs::backtrace::trace_unsynchronized::<std[128c3efe2914e152]::sys::backtrace::_print_fmt::{closure#1}>
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x614dc0759f4a - std[128c3efe2914e152]::sys::backtrace::_print_fmt
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/sys/backtrace.rs:74:9
[INFO] [stdout]    3:     0x614dc0759f4a - <<std[128c3efe2914e152]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[6771d259883166e6]::fmt::Display>::fmt
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/sys/backtrace.rs:44:26
[INFO] [stdout]    4:     0x614dc076dbba - <core[6771d259883166e6]::fmt::rt::Argument>::fmt
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/core/src/fmt/rt.rs:152:76
[INFO] [stdout]    5:     0x614dc076dbba - core[6771d259883166e6]::fmt::write
[INFO] [stdout]    6:     0x614dc075e7c2 - std[128c3efe2914e152]::io::default_write_fmt::<alloc[fef50e8eecedd288]::vec::Vec<u8>>
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/io/mod.rs:621:11
[INFO] [stdout]    7:     0x614dc075e7c2 - <alloc[fef50e8eecedd288]::vec::Vec<u8> as std[128c3efe2914e152]::io::Write>::write_fmt
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/io/mod.rs:1976:13
[INFO] [stdout]    8:     0x614dc07390df - <std[128c3efe2914e152]::sys::backtrace::BacktraceLock>::print
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/sys/backtrace.rs:47:9
[INFO] [stdout]    9:     0x614dc07390df - std[128c3efe2914e152]::panicking::default_hook::{closure#0}
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panicking.rs:292:27
[INFO] [stdout]   10:     0x614dc07523a9 - std[128c3efe2914e152]::panicking::default_hook
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panicking.rs:316:9
[INFO] [stdout]   11:     0x614dc06ef63c - <alloc[fef50e8eecedd288]::boxed::Box<dyn for<'a, 'b> core[6771d259883166e6]::ops::function::Fn<(&'a std[128c3efe2914e152]::panic::PanicHookInfo<'b>,), Output = ()> + core[6771d259883166e6]::marker::Sync + core[6771d259883166e6]::marker::Send> as core[6771d259883166e6]::ops::function::Fn<(&std[128c3efe2914e152]::panic::PanicHookInfo,)>>::call
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/alloc/src/boxed.rs:2263:9
[INFO] [stdout]   12:     0x614dc06ef63c - test[b137923399915ecf]::test_main_with_exit_callback::<test[b137923399915ecf]::test_main::{closure#0}>::{closure#0}
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x614dc0752562 - <alloc[fef50e8eecedd288]::boxed::Box<dyn for<'a, 'b> core[6771d259883166e6]::ops::function::Fn<(&'a std[128c3efe2914e152]::panic::PanicHookInfo<'b>,), Output = ()> + core[6771d259883166e6]::marker::Sync + core[6771d259883166e6]::marker::Send> as core[6771d259883166e6]::ops::function::Fn<(&std[128c3efe2914e152]::panic::PanicHookInfo,)>>::call
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/alloc/src/boxed.rs:2263:9
[INFO] [stdout]   14:     0x614dc0752562 - std[128c3efe2914e152]::panicking::panic_with_hook
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panicking.rs:833:13
[INFO] [stdout]   15:     0x614dc0739198 - std[128c3efe2914e152]::panicking::panic_handler::{closure#0}
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panicking.rs:698:13
[INFO] [stdout]   16:     0x614dc072e3a9 - std[128c3efe2914e152]::sys::backtrace::__rust_end_short_backtrace::<std[128c3efe2914e152]::panicking::panic_handler::{closure#0}, !>
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/sys/backtrace.rs:182:18
[INFO] [stdout]   17:     0x614dc0739ead - __rustc[752cc74e29381ccc]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panicking.rs:689:5
[INFO] [stdout]   18:     0x614dc076e2ac - core[6771d259883166e6]::panicking::panic_fmt
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/core/src/panicking.rs:80:14
[INFO] [stdout]   19:     0x614dc06e33b2 - rust_project_demo::struct::tests::greeting_contains_name::hbbbfa38f27c8d227
[INFO] [stdout]                                at /opt/rustwide/workdir/src/struct.rs:100:9
[INFO] [stdout]   20:     0x614dc06e1979 - rust_project_demo::struct::tests::greeting_contains_name::{{closure}}::h62f77c8a28c03e9f
[INFO] [stdout]                                at /opt/rustwide/workdir/src/struct.rs:98:32
[INFO] [stdout]   21:     0x614dc06e1979 - core::ops::function::FnOnce::call_once::hb2cf7302a00b7de6
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   22:     0x614dc06e373b - <fn() -> core[6771d259883166e6]::result::Result<(), alloc[fef50e8eecedd288]::string::String> as core[6771d259883166e6]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x614dc06e373b - test[b137923399915ecf]::__rust_begin_short_backtrace::<core[6771d259883166e6]::result::Result<(), alloc[fef50e8eecedd288]::string::String>, fn() -> core[6771d259883166e6]::result::Result<(), alloc[fef50e8eecedd288]::string::String>>
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/test/src/lib.rs:663:18
[INFO] [stdout]   24:     0x614dc06f010b - test[b137923399915ecf]::run_test_in_process::{closure#0}
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/test/src/lib.rs:686:74
[INFO] [stdout]   25:     0x614dc06f010b - <core[6771d259883166e6]::panic::unwind_safe::AssertUnwindSafe<test[b137923399915ecf]::run_test_in_process::{closure#0}> as core[6771d259883166e6]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/core/src/panic/unwind_safe.rs:275:9
[INFO] [stdout]   26:     0x614dc06f010b - std[128c3efe2914e152]::panicking::catch_unwind::do_call::<core[6771d259883166e6]::panic::unwind_safe::AssertUnwindSafe<test[b137923399915ecf]::run_test_in_process::{closure#0}>, core[6771d259883166e6]::result::Result<(), alloc[fef50e8eecedd288]::string::String>>
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panicking.rs:581:40
[INFO] [stdout]   27:     0x614dc06f010b - std[128c3efe2914e152]::panicking::catch_unwind::<core[6771d259883166e6]::result::Result<(), alloc[fef50e8eecedd288]::string::String>, core[6771d259883166e6]::panic::unwind_safe::AssertUnwindSafe<test[b137923399915ecf]::run_test_in_process::{closure#0}>>
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panicking.rs:544:19
[INFO] [stdout]   28:     0x614dc06f010b - std[128c3efe2914e152]::panic::catch_unwind::<core[6771d259883166e6]::panic::unwind_safe::AssertUnwindSafe<test[b137923399915ecf]::run_test_in_process::{closure#0}>, core[6771d259883166e6]::result::Result<(), alloc[fef50e8eecedd288]::string::String>>
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panic.rs:359:14
[INFO] [stdout]   29:     0x614dc06f010b - test[b137923399915ecf]::run_test_in_process
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/test/src/lib.rs:686:27
[INFO] [stdout]   30:     0x614dc06f010b - test[b137923399915ecf]::run_test::{closure#0}
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/test/src/lib.rs:607:43
[INFO] [stdout]   31:     0x614dc06ea564 - test[b137923399915ecf]::run_test::{closure#1}
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/test/src/lib.rs:637:41
[INFO] [stdout]   32:     0x614dc06ea564 - std[128c3efe2914e152]::sys::backtrace::__rust_begin_short_backtrace::<test[b137923399915ecf]::run_test::{closure#1}, ()>
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/sys/backtrace.rs:166:18
[INFO] [stdout]   33:     0x614dc06f2d12 - std[128c3efe2914e152]::thread::lifecycle::spawn_unchecked::<test[b137923399915ecf]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/thread/lifecycle.rs:91:13
[INFO] [stdout]   34:     0x614dc06f2d12 - <core[6771d259883166e6]::panic::unwind_safe::AssertUnwindSafe<std[128c3efe2914e152]::thread::lifecycle::spawn_unchecked<test[b137923399915ecf]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}> as core[6771d259883166e6]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/core/src/panic/unwind_safe.rs:275:9
[INFO] [stdout]   35:     0x614dc06f2d12 - std[128c3efe2914e152]::panicking::catch_unwind::do_call::<core[6771d259883166e6]::panic::unwind_safe::AssertUnwindSafe<std[128c3efe2914e152]::thread::lifecycle::spawn_unchecked<test[b137923399915ecf]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panicking.rs:581:40
[INFO] [stdout]   36:     0x614dc06f2d12 - std[128c3efe2914e152]::panicking::catch_unwind::<(), core[6771d259883166e6]::panic::unwind_safe::AssertUnwindSafe<std[128c3efe2914e152]::thread::lifecycle::spawn_unchecked<test[b137923399915ecf]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>>
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panicking.rs:544:19
[INFO] [stdout]   37:     0x614dc06f2d12 - std[128c3efe2914e152]::panic::catch_unwind::<core[6771d259883166e6]::panic::unwind_safe::AssertUnwindSafe<std[128c3efe2914e152]::thread::lifecycle::spawn_unchecked<test[b137923399915ecf]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/panic.rs:359:14
[INFO] [stdout]   38:     0x614dc06f2d12 - std[128c3efe2914e152]::thread::lifecycle::spawn_unchecked::<test[b137923399915ecf]::run_test::{closure#1}, ()>::{closure#1}
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/thread/lifecycle.rs:89:26
[INFO] [stdout]   39:     0x614dc06f2d12 - <std[128c3efe2914e152]::thread::lifecycle::spawn_unchecked<test[b137923399915ecf]::run_test::{closure#1}, ()>::{closure#1} as core[6771d259883166e6]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   40:     0x614dc075985f - <alloc[fef50e8eecedd288]::boxed::Box<dyn core[6771d259883166e6]::ops::function::FnOnce<(), Output = ()> + core[6771d259883166e6]::marker::Send> as core[6771d259883166e6]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/alloc/src/boxed.rs:2249:9
[INFO] [stdout]   41:     0x614dc075985f - <std[128c3efe2914e152]::sys::thread::unix::Thread>::new::thread_start
[INFO] [stdout]                                at /rustc/8489f1adbe1c8f8921cf18b9962cf565237a5489/library/std/src/sys/thread/unix.rs:118:17
[INFO] [stdout]   42:     0x79bf1a107aa4 - <unknown>
[INFO] [stdout]   43:     0x79bf1a194a64 - clone
[INFO] [stdout]   44:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     r#struct::tests::another
[INFO] [stdout]     r#struct::tests::greeting_contains_name
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 8 passed; 2 failed; 1 ignored; 0 measured; 0 filtered out; finished in 0.05s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8078a3f169a81038886d832aea4605587e634929100b74ea2dbb01b70d13b810", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8078a3f169a81038886d832aea4605587e634929100b74ea2dbb01b70d13b810", kill_on_drop: false }`
[INFO] [stdout] 8078a3f169a81038886d832aea4605587e634929100b74ea2dbb01b70d13b810
