[INFO] fetching crate rust_project_demo 0.1.0...
[INFO] testing rust_project_demo-0.1.0 against master#1871252fc8bb672d40787e67404e6eaae7059369 for pr-125151
[INFO] extracting crate rust_project_demo 0.1.0 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate rust_project_demo 0.1.0 on toolchain 1871252fc8bb672d40787e67404e6eaae7059369
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-3-tc1/source/Cargo.toml
[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" "+1871252fc8bb672d40787e67404e6eaae7059369" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rust_tutorials v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 899b79c3d97277c5d0c14d3926de77dd456a81924e16766377de027218000a11
[INFO] running `Command { std: "docker" "start" "-a" "899b79c3d97277c5d0c14d3926de77dd456a81924e16766377de027218000a11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "899b79c3d97277c5d0c14d3926de77dd456a81924e16766377de027218000a11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "899b79c3d97277c5d0c14d3926de77dd456a81924e16766377de027218000a11", kill_on_drop: false }`
[INFO] [stdout] 899b79c3d97277c5d0c14d3926de77dd456a81924e16766377de027218000a11
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] de3633e6805d05e806b44176ee967523abbb828e292f68fb1736da30cff0b58b
[INFO] running `Command { std: "docker" "start" "-a" "de3633e6805d05e806b44176ee967523abbb828e292f68fb1736da30cff0b58b", 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)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[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)]` 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)]` 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)]` 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)]` 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] 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((), (), (), ()),
[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] 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(()),
[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)]` 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)]` 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: 50 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [optimized + debuginfo] target(s) in 2.49s
[INFO] running `Command { std: "docker" "inspect" "de3633e6805d05e806b44176ee967523abbb828e292f68fb1736da30cff0b58b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de3633e6805d05e806b44176ee967523abbb828e292f68fb1736da30cff0b58b", kill_on_drop: false }`
[INFO] [stdout] de3633e6805d05e806b44176ee967523abbb828e292f68fb1736da30cff0b58b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2b9ee8c336349d92d3d05eca2faffa0a1e4a50e93e070accc9b1626bd29d058a
[INFO] running `Command { std: "docker" "start" "-a" "2b9ee8c336349d92d3d05eca2faffa0a1e4a50e93e070accc9b1626bd29d058a", 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)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rust_project_demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 1 warning emitted
[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)]` 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)]` 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)]` 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)]` 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] 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((), (), (), ()),
[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] 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(()),
[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)]` 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)]` 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: 50 warnings emitted
[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)]` on by default
[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)]` 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)]` 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: `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)]` 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)]` on by default
[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)]` 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)]` 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: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]   |
[INFO] [stdout] 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] 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(()),
[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)]` 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)]` 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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 46 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [optimized + debuginfo] target(s) in 0.55s
[INFO] running `Command { std: "docker" "inspect" "2b9ee8c336349d92d3d05eca2faffa0a1e4a50e93e070accc9b1626bd29d058a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b9ee8c336349d92d3d05eca2faffa0a1e4a50e93e070accc9b1626bd29d058a", kill_on_drop: false }`
[INFO] [stdout] 2b9ee8c336349d92d3d05eca2faffa0a1e4a50e93e070accc9b1626bd29d058a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 1e34e633d59b90c00e4546fcd6c18abc33066eae3390f88239a4ff4087655f2f
[INFO] running `Command { std: "docker" "start" "-a" "1e34e633d59b90c00e4546fcd6c18abc33066eae3390f88239a4ff4087655f2f", 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)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_project_demo` (lib) generated 1 warning
[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)]` 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)]` 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)]` 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: 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)]` 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] 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((), (), (), ()),
[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] 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(()),
[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` 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: 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: 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: 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)]` 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)]` 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: 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)]` 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)]` on by default
[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)]` on by default
[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: `#[warn(dead_code)]` 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((), (), (), ()),
[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: `rust_project_demo` (bin "rust_project_demo") generated 50 warnings (run `cargo fix --bin "rust_project_demo"` to apply 7 suggestions)
[INFO] [stderr] warning: `rust_project_demo` (test "integration_test") generated 1 warning (run `cargo fix --test "integration_test"` to apply 1 suggestion)
[INFO] [stderr] warning: `rust_project_demo` (test "another_integration_test") generated 1 warning (run `cargo fix --test "another_integration_test"` to apply 1 suggestion)
[INFO] [stderr] warning: `rust_project_demo` (test "result_test") generated 1 warning
[INFO] [stderr] warning: `rust_project_demo` (bin "rust_project_demo" test) generated 46 warnings (44 duplicates)
[INFO] [stderr]     Finished `test` profile [optimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rust_project_demo-edf31e6949988984)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_project_demo-e47467b8cfad64be)
[INFO] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stdout] test accepting_command_line_arguments::tests::one_result ... ok
[INFO] [stdout] test function_closures::tests::call_with_different_vaules ... ok
[INFO] [stdout] test function_closures::tests::iterator_sum ... 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::using_iterator_trait_method ... ok
[INFO] [stdout] test r#struct::tests::larger_can_hold_smaller ... ignored
[INFO] [stdout] test r#struct::tests::it_adds_two ... ok
[INFO] [stdout] test r#struct::tests::it_works ... ok
[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] thread 'r#struct::tests::another' panicked at src/struct.rs:69:9:
[INFO] [stdout] Make this test fail
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x558f8aa610a5 - std::backtrace_rs::backtrace::libunwind::trace::h59d96bdb08384354
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
[INFO] [stdout]    1:     0x558f8aa610a5 - std::backtrace_rs::backtrace::trace_unsynchronized::h9cf5becacfc93fba
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x558f8aa610a5 - std::sys_common::backtrace::_print_fmt::h10b76d10405dbd48
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stdout]    3:     0x558f8aa610a5 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h6ed9e62a156d84e4
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x558f8aa878eb - core::fmt::rt::Argument::fmt::h645c680983f03c9f
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/fmt/rt.rs:165:63
[INFO] [stdout]    5:     0x558f8aa878eb - core::fmt::write::h8bcd80919a02be29
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/fmt/mod.rs:1169:21
[INFO] [stdout]    6:     0x558f8aa5e8df - std::io::Write::write_fmt::h8d0c47c662cad79c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/io/mod.rs:1835:15
[INFO] [stdout]    7:     0x558f8aa60e7e - std::sys_common::backtrace::_print::h6306f131a28d62b0
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    8:     0x558f8aa60e7e - std::sys_common::backtrace::print::h7079288e0a26dfcc
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    9:     0x558f8aa628a9 - std::panicking::default_hook::{{closure}}::hb063ecec81a736ba
[INFO] [stdout]   10:     0x558f8aa6256e - std::panicking::default_hook::hd56ee406bf547b5c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:295:9
[INFO] [stdout]   11:     0x558f8aa3363a - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::he5eacdef44c8728f
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2036:9
[INFO] [stdout]   12:     0x558f8aa3363a - test::test_main::{{closure}}::h0ec9aed229e79095
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:137:21
[INFO] [stdout]   13:     0x558f8aa62eab - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hcbd0d80e1ad4e4f9
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2036:9
[INFO] [stdout]   14:     0x558f8aa62eab - std::panicking::rust_panic_with_hook::h624aa3ca42ebb8f2
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:799:13
[INFO] [stdout]   15:     0x558f8aa62beb - std::panicking::begin_panic_handler::{{closure}}::hbc4e76194a5e287c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:656:13
[INFO] [stdout]   16:     0x558f8aa61569 - std::sys_common::backtrace::__rust_end_short_backtrace::h847fedc9d1ff7b6d
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:171:18
[INFO] [stdout]   17:     0x558f8aa62957 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:652:5
[INFO] [stdout]   18:     0x558f8a9fdbc3 - core::panicking::panic_fmt::hec11a924b87ce965
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/panicking.rs:72:14
[INFO] [stdout]   19:     0x558f8a9ff00c - rust_project_demo::struct::tests::another::hee887c69d0770950
[INFO] [stdout]                                at /opt/rustwide/workdir/src/struct.rs:69:9
[INFO] [stdout]   20:     0x558f8a9ffbc6 - rust_project_demo::struct::tests::another::{{closure}}::h0016477e42059071
[INFO] [stdout]                                at /opt/rustwide/workdir/src/struct.rs:68:17
[INFO] [stdout]   21:     0x558f8a9ffbc6 - core::ops::function::FnOnce::call_once::h8952f8a94c0833ac
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   22:     0x558f8aa3801b - core::ops::function::FnOnce::call_once::h2e43a8f6f3d94b99
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x558f8aa3801b - test::__rust_begin_short_backtrace::h214c9f2d2d3fee90
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:625:18
[INFO] [stdout]   24:     0x558f8aa37721 - test::run_test_in_process::{{closure}}::h510b7ba7990692a5
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:648:60
[INFO] [stdout]   25:     0x558f8aa37721 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h4157186197a93871
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   26:     0x558f8aa37721 - std::panicking::try::do_call::h1bf2463bccd4b28c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:559:40
[INFO] [stdout]   27:     0x558f8aa37721 - std::panicking::try::hd6d4808c9fab4fa5
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:523:19
[INFO] [stdout]   28:     0x558f8aa37721 - std::panic::catch_unwind::hd5641d97d123f9f2
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panic.rs:149:14
[INFO] [stdout]   29:     0x558f8aa37721 - test::run_test_in_process::hc273b71c8b878a4c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:648:27
[INFO] [stdout]   30:     0x558f8aa37721 - test::run_test::{{closure}}::h6838df834eb8467e
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:569:43
[INFO] [stdout]   31:     0x558f8aa000e4 - test::run_test::{{closure}}::h608b98ecff5665fb
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:599:41
[INFO] [stdout]   32:     0x558f8aa000e4 - std::sys_common::backtrace::__rust_begin_short_backtrace::hdc4182b97d1042e9
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:155:18
[INFO] [stdout]   33:     0x558f8aa04b12 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h571773fd21d674c8
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/thread/mod.rs:542:17
[INFO] [stdout]   34:     0x558f8aa04b12 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hdcd384cf2fa70ba3
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   35:     0x558f8aa04b12 - std::panicking::try::do_call::h4f1a44bd81423be1
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:559:40
[INFO] [stdout]   36:     0x558f8aa04b12 - std::panicking::try::h5e02afcb81dcd361
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:523:19
[INFO] [stdout]   37:     0x558f8aa04b12 - std::panic::catch_unwind::h022f75775bfd8c45
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panic.rs:149:14
[INFO] [stdout]   38:     0x558f8aa04b12 - std::thread::Builder::spawn_unchecked_::{{closure}}::hf5a62e9e4e6df1f8
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/thread/mod.rs:541:30
[INFO] [stdout]   39:     0x558f8aa04b12 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h6d56360aeb9509a7
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   40:     0x558f8aa6708b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h7a343dc551c06baa
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2022:9
[INFO] [stdout]   41:     0x558f8aa6708b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h30b8111cbaa644f3
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2022:9
[INFO] [stdout]   42:     0x558f8aa6708b - std::sys::pal::unix::thread::Thread::new::thread_start::h7404e134e61e7a11
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys/pal/unix/thread.rs:108:17
[INFO] [stdout]   43:     0x7fe55dfefac3 - <unknown>
[INFO] [stdout]   44:     0x7fe55e080a04 - __clone
[INFO] [stdout]   45:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- r#struct::tests::greeting_contains_name stdout ----
[INFO] [stdout] thread 'r#struct::tests::greeting_contains_name' panicked at src/struct.rs:100:9:
[INFO] [stdout] Greeting did not contain name, value was `Hello!`
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x558f8aa610a5 - std::backtrace_rs::backtrace::libunwind::trace::h59d96bdb08384354
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
[INFO] [stdout]    1:     0x558f8aa610a5 - std::backtrace_rs::backtrace::trace_unsynchronized::h9cf5becacfc93fba
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x558f8aa610a5 - std::sys_common::backtrace::_print_fmt::h10b76d10405dbd48
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stdout]    3:     0x558f8aa610a5 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h6ed9e62a156d84e4
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x558f8aa878eb - core::fmt::rt::Argument::fmt::h645c680983f03c9f
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/fmt/rt.rs:165:63
[INFO] [stdout]    5:     0x558f8aa878eb - core::fmt::write::h8bcd80919a02be29
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/fmt/mod.rs:1169:21
[INFO] [stdout]    6:     0x558f8aa5e8df - std::io::Write::write_fmt::h8d0c47c662cad79c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/io/mod.rs:1835:15
[INFO] [stdout]    7:     0x558f8aa60e7e - std::sys_common::backtrace::_print::h6306f131a28d62b0
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    8:     0x558f8aa60e7e - std::sys_common::backtrace::print::h7079288e0a26dfcc
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    9:     0x558f8aa628a9 - std::panicking::default_hook::{{closure}}::hb063ecec81a736ba
[INFO] [stdout]   10:     0x558f8aa6256e - std::panicking::default_hook::hd56ee406bf547b5c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:295:9
[INFO] [stdout]   11:     0x558f8aa3363a - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::he5eacdef44c8728f
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2036:9
[INFO] [stdout]   12:     0x558f8aa3363a - test::test_main::{{closure}}::h0ec9aed229e79095
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:137:21
[INFO] [stdout]   13:     0x558f8aa62eab - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hcbd0d80e1ad4e4f9
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2036:9
[INFO] [stdout]   14:     0x558f8aa62eab - std::panicking::rust_panic_with_hook::h624aa3ca42ebb8f2
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:799:13
[INFO] [stdout]   15:     0x558f8aa62c24 - std::panicking::begin_panic_handler::{{closure}}::hbc4e76194a5e287c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:664:13
[INFO] [stdout]   16:     0x558f8aa61569 - std::sys_common::backtrace::__rust_end_short_backtrace::h847fedc9d1ff7b6d
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:171:18
[INFO] [stdout]   17:     0x558f8aa62957 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:652:5
[INFO] [stdout]   18:     0x558f8a9fdbc3 - core::panicking::panic_fmt::hec11a924b87ce965
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/panicking.rs:72:14
[INFO] [stdout]   19:     0x558f8a9ff160 - rust_project_demo::struct::tests::greeting_contains_name::h85f67ff8b2d89e19
[INFO] [stdout]                                at /opt/rustwide/workdir/src/struct.rs:100:9
[INFO] [stdout]   20:     0x558f8a9ffc49 - rust_project_demo::struct::tests::greeting_contains_name::{{closure}}::h4ac944991deca406
[INFO] [stdout]                                at /opt/rustwide/workdir/src/struct.rs:98:32
[INFO] [stdout]   21:     0x558f8a9ffc49 - core::ops::function::FnOnce::call_once::hec5dd9c09b8de048
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   22:     0x558f8aa3801b - core::ops::function::FnOnce::call_once::h2e43a8f6f3d94b99
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x558f8aa3801b - test::__rust_begin_short_backtrace::h214c9f2d2d3fee90
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:625:18
[INFO] [stdout]   24:     0x558f8aa37721 - test::run_test_in_process::{{closure}}::h510b7ba7990692a5
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:648:60
[INFO] [stdout]   25:     0x558f8aa37721 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h4157186197a93871
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   26:     0x558f8aa37721 - std::panicking::try::do_call::h1bf2463bccd4b28c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:559:40
[INFO] [stdout]   27:     0x558f8aa37721 - std::panicking::try::hd6d4808c9fab4fa5
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:523:19
[INFO] [stdout]   28:     0x558f8aa37721 - std::panic::catch_unwind::hd5641d97d123f9f2
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panic.rs:149:14
[INFO] [stdout]   29:     0x558f8aa37721 - test::run_test_in_process::hc273b71c8b878a4c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:648:27
[INFO] [stdout]   30:     0x558f8aa37721 - test::run_test::{{closure}}::h6838df834eb8467e
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:569:43
[INFO] [stdout]   31:     0x558f8aa000e4 - test::run_test::{{closure}}::h608b98ecff5665fb
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:599:41
[INFO] [stdout]   32:     0x558f8aa000e4 - std::sys_common::backtrace::__rust_begin_short_backtrace::hdc4182b97d1042e9
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:155:18
[INFO] [stdout]   33:     0x558f8aa04b12 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h571773fd21d674c8
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/thread/mod.rs:542:17
[INFO] [stdout]   34:     0x558f8aa04b12 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hdcd384cf2fa70ba3
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   35:     0x558f8aa04b12 - std::panicking::try::do_call::h4f1a44bd81423be1
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:559:40
[INFO] [stdout]   36:     0x558f8aa04b12 - std::panicking::try::h5e02afcb81dcd361
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:523:19
[INFO] [stdout]   37:     0x558f8aa04b12 - std::panic::catch_unwind::h022f75775bfd8c45
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panic.rs:149:14
[INFO] [stdout]   38:     0x558f8aa04b12 - std::thread::Builder::spawn_unchecked_::{{closure}}::hf5a62e9e4e6df1f8
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/thread/mod.rs:541:30
[INFO] [stdout]   39:     0x558f8aa04b12 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h6d56360aeb9509a7
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   40:     0x558f8aa6708b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h7a343dc551c06baa
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2022:9
[INFO] [stdout]   41:     0x558f8aa6708b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h30b8111cbaa644f3
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2022:9
[INFO] [stdout]   42:     0x558f8aa6708b - std::sys::pal::unix::thread::Thread::new::thread_start::h7404e134e61e7a11
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys/pal/unix/thread.rs:108:17
[INFO] [stdout]   43:     0x7fe55dfefac3 - <unknown>
[INFO] [stdout]   44:     0x7fe55e080a04 - __clone
[INFO] [stdout]   45:                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 0.01s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin rust_project_demo`
[INFO] running `Command { std: "docker" "inspect" "1e34e633d59b90c00e4546fcd6c18abc33066eae3390f88239a4ff4087655f2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e34e633d59b90c00e4546fcd6c18abc33066eae3390f88239a4ff4087655f2f", kill_on_drop: false }`
[INFO] [stdout] 1e34e633d59b90c00e4546fcd6c18abc33066eae3390f88239a4ff4087655f2f
[INFO] testing rust_project_demo-0.1.0 against try#b642703cf9526da1e72c0b6755753b939a9c6b6d for pr-125151
[INFO] extracting crate rust_project_demo 0.1.0 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate rust_project_demo 0.1.0 on toolchain b642703cf9526da1e72c0b6755753b939a9c6b6d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-3-tc2/source/Cargo.toml
[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" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 38c5d4acc28ea13c61850e87303e27fb3e1b10ac48f5624a4b37472de4a791bd
[INFO] running `Command { std: "docker" "start" "-a" "38c5d4acc28ea13c61850e87303e27fb3e1b10ac48f5624a4b37472de4a791bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "38c5d4acc28ea13c61850e87303e27fb3e1b10ac48f5624a4b37472de4a791bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38c5d4acc28ea13c61850e87303e27fb3e1b10ac48f5624a4b37472de4a791bd", kill_on_drop: false }`
[INFO] [stdout] 38c5d4acc28ea13c61850e87303e27fb3e1b10ac48f5624a4b37472de4a791bd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e946a16b48d716d54c6d79abad44bace88311e8de4a476bf6a7866283bd09318
[INFO] running `Command { std: "docker" "start" "-a" "e946a16b48d716d54c6d79abad44bace88311e8de4a476bf6a7866283bd09318", 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)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[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)]` 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)]` 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)]` 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)]` 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] 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((), (), (), ()),
[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] 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(()),
[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)]` 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)]` 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: 50 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [optimized + debuginfo] target(s) in 2.24s
[INFO] running `Command { std: "docker" "inspect" "e946a16b48d716d54c6d79abad44bace88311e8de4a476bf6a7866283bd09318", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e946a16b48d716d54c6d79abad44bace88311e8de4a476bf6a7866283bd09318", kill_on_drop: false }`
[INFO] [stdout] e946a16b48d716d54c6d79abad44bace88311e8de4a476bf6a7866283bd09318
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 844ede32e209d72cabb4487bd90779ca9c0f54c4562e8d8f512653cc36bc8d93
[INFO] running `Command { std: "docker" "start" "-a" "844ede32e209d72cabb4487bd90779ca9c0f54c4562e8d8f512653cc36bc8d93", 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)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rust_project_demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 1 warning emitted
[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)]` 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)]` 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)]` 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)]` 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] 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((), (), (), ()),
[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] 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(()),
[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)]` 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)]` 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: 50 warnings emitted
[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)]` on by default
[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)]` 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)]` 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: `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)]` 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)]` on by default
[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)]` 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)]` 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: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]   |
[INFO] [stdout] 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] 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(()),
[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)]` 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)]` 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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 46 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [optimized + debuginfo] target(s) in 0.62s
[INFO] running `Command { std: "docker" "inspect" "844ede32e209d72cabb4487bd90779ca9c0f54c4562e8d8f512653cc36bc8d93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "844ede32e209d72cabb4487bd90779ca9c0f54c4562e8d8f512653cc36bc8d93", kill_on_drop: false }`
[INFO] [stdout] 844ede32e209d72cabb4487bd90779ca9c0f54c4562e8d8f512653cc36bc8d93
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 116f73c76c6e2929ec506240e5b93a2d4422a3dc46107e13261d34ddc76221b4
[INFO] running `Command { std: "docker" "start" "-a" "116f73c76c6e2929ec506240e5b93a2d4422a3dc46107e13261d34ddc76221b4", 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)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_project_demo` (lib) generated 1 warning
[INFO] [stderr] warning: `rust_project_demo` (lib test) generated 1 warning (1 duplicate)
[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)]` on by default
[INFO] [stderr] 
[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)]` 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)]` 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)]` 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: 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)]` 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] 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((), (), (), ()),
[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] 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(()),
[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` 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: 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: 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: 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)]` 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)]` 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: 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)]` on by default
[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: `#[warn(dead_code)]` 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((), (), (), ()),
[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: 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)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_project_demo` (test "result_test") generated 1 warning
[INFO] [stderr] warning: `rust_project_demo` (bin "rust_project_demo") generated 50 warnings (run `cargo fix --bin "rust_project_demo"` to apply 7 suggestions)
[INFO] [stderr] warning: `rust_project_demo` (test "another_integration_test") generated 1 warning (run `cargo fix --test "another_integration_test"` to apply 1 suggestion)
[INFO] [stderr] warning: `rust_project_demo` (bin "rust_project_demo" test) generated 46 warnings (44 duplicates)
[INFO] [stderr] warning: `rust_project_demo` (test "integration_test") generated 1 warning (run `cargo fix --test "integration_test"` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [optimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rust_project_demo-edf31e6949988984)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_project_demo-e47467b8cfad64be)
[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::iterator_sum ... 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 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] [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] thread 'r#struct::tests::another' panicked at src/struct.rs:69:9:
[INFO] [stdout] Make this test fail
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x55f9fcb22135 - std::backtrace_rs::backtrace::libunwind::trace::he49dc9a9e3164223
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
[INFO] [stdout]    1:     0x55f9fcb22135 - std::backtrace_rs::backtrace::trace_unsynchronized::h3a3e77c68030aa6b
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x55f9fcb22135 - std::sys_common::backtrace::_print_fmt::h9479ad2f99afd5d4
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stdout]    3:     0x55f9fcb22135 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hfb01aa1fa3fb1821
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x55f9fcb4891b - core::fmt::rt::Argument::fmt::h125e56152abbc1c3
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/fmt/rt.rs:165:63
[INFO] [stdout]    5:     0x55f9fcb4891b - core::fmt::write::hb0ab4ff05ccfe741
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/fmt/mod.rs:1169:21
[INFO] [stdout]    6:     0x55f9fcb1fa1f - std::io::Write::write_fmt::hea6336dbf2fa00b8
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/io/mod.rs:1835:15
[INFO] [stdout]    7:     0x55f9fcb21f0e - std::sys_common::backtrace::_print::h79ca548f3a2adf4b
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    8:     0x55f9fcb21f0e - std::sys_common::backtrace::print::h9aebf997b2fea2d3
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    9:     0x55f9fcb23879 - std::panicking::default_hook::{{closure}}::h68a0954af2694526
[INFO] [stdout]   10:     0x55f9fcb235cc - std::panicking::default_hook::h5be50cc6849ffb00
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:295:9
[INFO] [stdout]   11:     0x55f9fcaf46ff - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hd874405dcbd1d3ed
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/alloc/src/boxed.rs:2036:9
[INFO] [stdout]   12:     0x55f9fcaf46ff - test::test_main::{{closure}}::h4f26a9df34a84b94
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:137:21
[INFO] [stdout]   13:     0x55f9fcb23e7b - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h00e96d9c62aa9a12
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/alloc/src/boxed.rs:2036:9
[INFO] [stdout]   14:     0x55f9fcb23e7b - std::panicking::rust_panic_with_hook::h3c0df6036729334c
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:799:13
[INFO] [stdout]   15:     0x55f9fcb23bbb - std::panicking::begin_panic_handler::{{closure}}::ha3a21e93c4cfd807
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:656:13
[INFO] [stdout]   16:     0x55f9fcb225f9 - std::sys_common::backtrace::__rust_end_short_backtrace::h19508a8f8ae71dc9
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:171:18
[INFO] [stdout]   17:     0x55f9fcb23927 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:652:5
[INFO] [stdout]   18:     0x55f9fcabeba3 - core::panicking::panic_fmt::h2ba8af99174d83ea
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/panicking.rs:72:14
[INFO] [stdout]   19:     0x55f9fcabffec - rust_project_demo::struct::tests::another::h4b48f173f392d682
[INFO] [stdout]                                at /opt/rustwide/workdir/src/struct.rs:69:9
[INFO] [stdout]   20:     0x55f9fcac0b46 - rust_project_demo::struct::tests::another::{{closure}}::h1aa27a1a52ce87ce
[INFO] [stdout]                                at /opt/rustwide/workdir/src/struct.rs:68:17
[INFO] [stdout]   21:     0x55f9fcac0b46 - core::ops::function::FnOnce::call_once::h7adad93826c4a058
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   22:     0x55f9fcaf901b - core::ops::function::FnOnce::call_once::h18c6bf92212b87a4
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x55f9fcaf901b - test::__rust_begin_short_backtrace::hdcf0edcfa9080086
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:625:18
[INFO] [stdout]   24:     0x55f9fcaf86e1 - test::run_test_in_process::{{closure}}::heac2c4eb375d2d10
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:648:60
[INFO] [stdout]   25:     0x55f9fcaf86e1 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h0289bafc8a1cc004
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   26:     0x55f9fcaf86e1 - std::panicking::try::do_call::h5e158f1ad8a5f983
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:559:40
[INFO] [stdout]   27:     0x55f9fcaf86e1 - std::panicking::try::hea3411d60321c4de
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:523:19
[INFO] [stdout]   28:     0x55f9fcaf86e1 - std::panic::catch_unwind::hafb7bb18bc47bbc7
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panic.rs:149:14
[INFO] [stdout]   29:     0x55f9fcaf86e1 - test::run_test_in_process::h74dd138dc7762d99
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:648:27
[INFO] [stdout]   30:     0x55f9fcaf86e1 - test::run_test::{{closure}}::h6b390822e63606cf
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:569:43
[INFO] [stdout]   31:     0x55f9fcac10b4 - test::run_test::{{closure}}::h6e11dba8131d354b
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:599:41
[INFO] [stdout]   32:     0x55f9fcac10b4 - std::sys_common::backtrace::__rust_begin_short_backtrace::ha71b3541b59bdbbb
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:155:18
[INFO] [stdout]   33:     0x55f9fcac5b82 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hef92127c5ef9e53c
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/thread/mod.rs:542:17
[INFO] [stdout]   34:     0x55f9fcac5b82 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h859c109f9d11c92b
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   35:     0x55f9fcac5b82 - std::panicking::try::do_call::hbf534c458cd858f0
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:559:40
[INFO] [stdout]   36:     0x55f9fcac5b82 - std::panicking::try::h65c18365a7b9ad90
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:523:19
[INFO] [stdout]   37:     0x55f9fcac5b82 - std::panic::catch_unwind::h21b25d4c69478c39
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panic.rs:149:14
[INFO] [stdout]   38:     0x55f9fcac5b82 - std::thread::Builder::spawn_unchecked_::{{closure}}::h23335f620275a9bf
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/thread/mod.rs:541:30
[INFO] [stdout]   39:     0x55f9fcac5b82 - core::ops::function::FnOnce::call_once{{vtable.shim}}::hb491dc55513e9b7c
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   40:     0x55f9fcb2804b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h41b39260afcffdc9
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/alloc/src/boxed.rs:2022:9
[INFO] [stdout]   41:     0x55f9fcb2804b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h6694c8dc6dd010c4
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/alloc/src/boxed.rs:2022:9
[INFO] [stdout]   42:     0x55f9fcb2804b - std::sys::pal::unix::thread::Thread::new::thread_start::hf16038e1c8e19c99
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys/pal/unix/thread.rs:108:17
[INFO] [stdout]   43:     0x7f99e73d7ac3 - <unknown>
[INFO] [stdout]   44:     0x7f99e7468a04 - __clone
[INFO] [stdout]   45:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- r#struct::tests::greeting_contains_name stdout ----
[INFO] [stdout] thread 'r#struct::tests::greeting_contains_name' panicked at src/struct.rs:100:9:
[INFO] [stdout] Greeting did not contain name, value was `Hello!`
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x55f9fcb22135 - std::backtrace_rs::backtrace::libunwind::trace::he49dc9a9e3164223
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
[INFO] [stdout]    1:     0x55f9fcb22135 - std::backtrace_rs::backtrace::trace_unsynchronized::h3a3e77c68030aa6b
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x55f9fcb22135 - std::sys_common::backtrace::_print_fmt::h9479ad2f99afd5d4
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stdout]    3:     0x55f9fcb22135 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hfb01aa1fa3fb1821
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x55f9fcb4891b - core::fmt::rt::Argument::fmt::h125e56152abbc1c3
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/fmt/rt.rs:165:63
[INFO] [stdout]    5:     0x55f9fcb4891b - core::fmt::write::hb0ab4ff05ccfe741
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/fmt/mod.rs:1169:21
[INFO] [stdout]    6:     0x55f9fcb1fa1f - std::io::Write::write_fmt::hea6336dbf2fa00b8
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/io/mod.rs:1835:15
[INFO] [stdout]    7:     0x55f9fcb21f0e - std::sys_common::backtrace::_print::h79ca548f3a2adf4b
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    8:     0x55f9fcb21f0e - std::sys_common::backtrace::print::h9aebf997b2fea2d3
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    9:     0x55f9fcb23879 - std::panicking::default_hook::{{closure}}::h68a0954af2694526
[INFO] [stdout]   10:     0x55f9fcb235cc - std::panicking::default_hook::h5be50cc6849ffb00
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:295:9
[INFO] [stdout]   11:     0x55f9fcaf46ff - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hd874405dcbd1d3ed
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/alloc/src/boxed.rs:2036:9
[INFO] [stdout]   12:     0x55f9fcaf46ff - test::test_main::{{closure}}::h4f26a9df34a84b94
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:137:21
[INFO] [stdout]   13:     0x55f9fcb23e7b - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h00e96d9c62aa9a12
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/alloc/src/boxed.rs:2036:9
[INFO] [stdout]   14:     0x55f9fcb23e7b - std::panicking::rust_panic_with_hook::h3c0df6036729334c
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:799:13
[INFO] [stdout]   15:     0x55f9fcb23bf4 - std::panicking::begin_panic_handler::{{closure}}::ha3a21e93c4cfd807
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:664:13
[INFO] [stdout]   16:     0x55f9fcb225f9 - std::sys_common::backtrace::__rust_end_short_backtrace::h19508a8f8ae71dc9
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:171:18
[INFO] [stdout]   17:     0x55f9fcb23927 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:652:5
[INFO] [stdout]   18:     0x55f9fcabeba3 - core::panicking::panic_fmt::h2ba8af99174d83ea
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/panicking.rs:72:14
[INFO] [stdout]   19:     0x55f9fcac0140 - rust_project_demo::struct::tests::greeting_contains_name::hc353f73716a20c8d
[INFO] [stdout]                                at /opt/rustwide/workdir/src/struct.rs:100:9
[INFO] [stdout]   20:     0x55f9fcac0ae9 - rust_project_demo::struct::tests::greeting_contains_name::{{closure}}::h386350eb8face68a
[INFO] [stdout]                                at /opt/rustwide/workdir/src/struct.rs:98:32
[INFO] [stdout]   21:     0x55f9fcac0ae9 - core::ops::function::FnOnce::call_once::h2e811d3870b5a339
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   22:     0x55f9fcaf901b - core::ops::function::FnOnce::call_once::h18c6bf92212b87a4
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x55f9fcaf901b - test::__rust_begin_short_backtrace::hdcf0edcfa9080086
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:625:18
[INFO] [stdout]   24:     0x55f9fcaf86e1 - test::run_test_in_process::{{closure}}::heac2c4eb375d2d10
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:648:60
[INFO] [stdout]   25:     0x55f9fcaf86e1 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h0289bafc8a1cc004
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   26:     0x55f9fcaf86e1 - std::panicking::try::do_call::h5e158f1ad8a5f983
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:559:40
[INFO] [stdout]   27:     0x55f9fcaf86e1 - std::panicking::try::hea3411d60321c4de
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:523:19
[INFO] [stdout]   28:     0x55f9fcaf86e1 - std::panic::catch_unwind::hafb7bb18bc47bbc7
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panic.rs:149:14
[INFO] [stdout]   29:     0x55f9fcaf86e1 - test::run_test_in_process::h74dd138dc7762d99
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:648:27
[INFO] [stdout]   30:     0x55f9fcaf86e1 - test::run_test::{{closure}}::h6b390822e63606cf
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:569:43
[INFO] [stdout]   31:     0x55f9fcac10b4 - test::run_test::{{closure}}::h6e11dba8131d354b
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:599:41
[INFO] [stdout]   32:     0x55f9fcac10b4 - std::sys_common::backtrace::__rust_begin_short_backtrace::ha71b3541b59bdbbb
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:155:18
[INFO] [stdout]   33:     0x55f9fcac5b82 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hef92127c5ef9e53c
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/thread/mod.rs:542:17
[INFO] [stdout]   34:     0x55f9fcac5b82 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h859c109f9d11c92b
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   35:     0x55f9fcac5b82 - std::panicking::try::do_call::hbf534c458cd858f0
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:559:40
[INFO] [stdout]   36:     0x55f9fcac5b82 - std::panicking::try::h65c18365a7b9ad90
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:523:19
[INFO] [stdout]   37:     0x55f9fcac5b82 - std::panic::catch_unwind::h21b25d4c69478c39
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panic.rs:149:14
[INFO] [stdout]   38:     0x55f9fcac5b82 - std::thread::Builder::spawn_unchecked_::{{closure}}::h23335f620275a9bf
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/thread/mod.rs:541:30
[INFO] [stdout]   39:     0x55f9fcac5b82 - core::ops::function::FnOnce::call_once{{vtable.shim}}::hb491dc55513e9b7c
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   40:     0x55f9fcb2804b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h41b39260afcffdc9
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/alloc/src/boxed.rs:2022:9
[INFO] [stdout]   41:     0x55f9fcb2804b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h6694c8dc6dd010c4
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/alloc/src/boxed.rs:2022:9
[INFO] [stdout]   42:     0x55f9fcb2804b - std::sys::pal::unix::thread::Thread::new::thread_start::hf16038e1c8e19c99
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys/pal/unix/thread.rs:108:17
[INFO] [stdout]   43:     0x7f99e73d7ac3 - <unknown>
[INFO] [stdout]   44:     0x7f99e7468a04 - __clone
[INFO] [stdout]   45:                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 0.01s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin rust_project_demo`
[INFO] running `Command { std: "docker" "inspect" "116f73c76c6e2929ec506240e5b93a2d4422a3dc46107e13261d34ddc76221b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "116f73c76c6e2929ec506240e5b93a2d4422a3dc46107e13261d34ddc76221b4", kill_on_drop: false }`
[INFO] [stdout] 116f73c76c6e2929ec506240e5b93a2d4422a3dc46107e13261d34ddc76221b4
