[INFO] cloning repository https://github.com/Medsko/study-crate
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Medsko/study-crate" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMedsko%2Fstudy-crate", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMedsko%2Fstudy-crate'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a11285a06e1b2a2e0b07f581d6e672072c061222
[INFO] testing Medsko/study-crate against try#db823df02fd0c2cf67b43025ac3fef3f2d743245 for pr-150681
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMedsko%2Fstudy-crate" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Medsko/study-crate
[INFO] finished tweaking git repo https://github.com/Medsko/study-crate
[INFO] tweaked toml for git repo https://github.com/Medsko/study-crate written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Medsko/study-crate on toolchain db823df02fd0c2cf67b43025ac3fef3f2d743245
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Medsko/study-crate 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" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: package.licence
[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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bf941a7766985ab2571b1664df15972a06b35cf52e6e784494d1dee5b208c226
[INFO] running `Command { std: "docker" "start" "-a" "bf941a7766985ab2571b1664df15972a06b35cf52e6e784494d1dee5b208c226", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bf941a7766985ab2571b1664df15972a06b35cf52e6e784494d1dee5b208c226", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf941a7766985ab2571b1664df15972a06b35cf52e6e784494d1dee5b208c226", kill_on_drop: false }`
[INFO] [stdout] bf941a7766985ab2571b1664df15972a06b35cf52e6e784494d1dee5b208c226
[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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ca380c76022cb531c4f7e1238a17f4cbe1278af91ce53f05502a755442853e82
[INFO] running `Command { std: "docker" "start" "-a" "ca380c76022cb531c4f7e1238a17f4cbe1278af91ce53f05502a755442853e82", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: package.licence
[INFO] [stderr]    Compiling libc v0.2.74
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling ppv-lite86 v0.2.8
[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 study-crate v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `exercise` is never used
[INFO] [stdout]  --> src/collections/exercises.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn exercise() {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `employee_registration` is never used
[INFO] [stdout]   --> src/collections/exercises.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub fn employee_registration() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `remove_employee` is never used
[INFO] [stdout]   --> src/collections/exercises.rs:70:4
[INFO] [stdout]    |
[INFO] [stdout] 70 | fn remove_employee(register: &mut HashMap<String, Vec<String>>, other_words: &mut SplitWhitespace) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `extract_full_name` is never used
[INFO] [stdout]   --> src/collections/exercises.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn extract_full_name(words: &mut SplitWhitespace, stop: &str) -> Result<String, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `register_employee` is never used
[INFO] [stdout]    --> src/collections/exercises.rs:108:4
[INFO] [stdout]     |
[INFO] [stdout] 108 | fn register_employee(register: &mut HashMap<String, Vec<String>>, other_words: &mut SplitWhitespace) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_register` is never used
[INFO] [stdout]    --> src/collections/exercises.rs:119:4
[INFO] [stdout]     |
[INFO] [stdout] 119 | fn print_register(register: &HashMap<String, Vec<String>>) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hash_it_up` is never used
[INFO] [stdout]  --> src/collections/hashmaps.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn hash_it_up() {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `string_stuff` is never used
[INFO] [stdout]  --> src/collections/strings.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn string_stuff() {
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `got_game` is never used
[INFO] [stdout]   --> src/collections/strings.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn got_game() -> String {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `to_pig_latin` is never used
[INFO] [stdout]   --> src/collections/strings.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn to_pig_latin(kosher: &String) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_vowel` is never used
[INFO] [stdout]   --> src/collections/strings.rs:53:4
[INFO] [stdout]    |
[INFO] [stdout] 53 | fn is_vowel(maybe_vowel: &char) -> bool {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Guess` is never constructed
[INFO] [stdout]  --> src/prepackages/gg.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Guess {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `value` are never used
[INFO] [stdout]   --> src/prepackages/gg.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl Guess {
[INFO] [stdout]    | ---------- associated items in this implementation
[INFO] [stdout] 11 |     pub fn new(value: i32) -> Guess {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub fn value(&self) -> i32 {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `play_the_guessing_game` is never used
[INFO] [stdout]   --> src/prepackages/gg.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub fn play_the_guessing_game() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `own` is never used
[INFO] [stdout]  --> src/prepackages/ownership.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn own() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `takes_ownership` is never used
[INFO] [stdout]   --> src/prepackages/ownership.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn takes_ownership(val: String) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `makes_copy` is never used
[INFO] [stdout]   --> src/prepackages/ownership.rs:51:4
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn makes_copy(number: i32) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `references_and_borrowing` is never used
[INFO] [stdout]   --> src/prepackages/ownership.rs:56:4
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn references_and_borrowing() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `calculate_length` is never used
[INFO] [stdout]   --> src/prepackages/ownership.rs:87:4
[INFO] [stdout]    |
[INFO] [stdout] 87 | fn calculate_length(s: &String) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `string_to_length` is never used
[INFO] [stdout]   --> src/prepackages/ownership.rs:91:4
[INFO] [stdout]    |
[INFO] [stdout] 91 | fn string_to_length(s: String) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_length` is never used
[INFO] [stdout]   --> src/prepackages/ownership.rs:95:4
[INFO] [stdout]    |
[INFO] [stdout] 95 | fn print_length(s: &String) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `legalized_modification` is never used
[INFO] [stdout]    --> src/prepackages/ownership.rs:103:4
[INFO] [stdout]     |
[INFO] [stdout] 103 | fn legalized_modification(s: &mut String) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `slice_stuff` is never used
[INFO] [stdout]    --> src/prepackages/ownership.rs:108:4
[INFO] [stdout]     |
[INFO] [stdout] 108 | fn slice_stuff() {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `slice_first_word` is never used
[INFO] [stdout]    --> src/prepackages/ownership.rs:124:4
[INFO] [stdout]     |
[INFO] [stdout] 124 | fn slice_first_word(s: &String) -> &str {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_word` is never used
[INFO] [stdout]    --> src/prepackages/ownership.rs:140:4
[INFO] [stdout]     |
[INFO] [stdout] 140 | fn first_word(s: &String) -> usize {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]  --> src/prepackages/structs.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct User {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Color` is never constructed
[INFO] [stdout]  --> src/prepackages/structs.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Color(i32, i32, i32);
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]   --> src/prepackages/structs.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Point(i32, i32, i32);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `structure` is never used
[INFO] [stdout]   --> src/prepackages/structs.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub fn structure() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_structs` is never used
[INFO] [stdout]   --> src/prepackages/structs.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn first_structs() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `build_user` is never used
[INFO] [stdout]   --> src/prepackages/structs.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn build_user(email: String, username1: String) -> User {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]   --> src/prepackages/structs.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | struct Rectangle {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Circle` is never constructed
[INFO] [stdout]   --> src/prepackages/structs.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | struct Circle {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]   --> src/prepackages/structs.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | impl Rectangle {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 60 |
[INFO] [stdout] 61 |     fn area(&self) -> u32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 65 |     fn longest_side(&self) -> u32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 72 |     fn is_square(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 77 |     fn transform_to_circle(self) -> Circle {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 81 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 85 |     fn stretch(&mut self, add_height: u32, add_width: u32) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 91 |     fn square(size: u32) -> Rectangle {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `shrink` is never used
[INFO] [stdout]    --> src/prepackages/structs.rs:101:8
[INFO] [stdout]     |
[INFO] [stdout] 100 | impl Rectangle {
[INFO] [stdout]     | -------------- method in this implementation
[INFO] [stdout] 101 |     fn shrink(&mut self, take_height: u32, take_width: u32) {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rectangles` is never used
[INFO] [stdout]    --> src/prepackages/structs.rs:107:4
[INFO] [stdout]     |
[INFO] [stdout] 107 | fn rectangles() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `area` is never used
[INFO] [stdout]    --> src/prepackages/structs.rs:131:4
[INFO] [stdout]     |
[INFO] [stdout] 131 | fn area(rectangle: &Rectangle) -> u32 {
[INFO] [stdout]     |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `variate` is never used
[INFO] [stdout]  --> src/prepackages/variables.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn variate() {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `function_stuff` is never used
[INFO] [stdout]   --> src/prepackages/variables.rs:44:4
[INFO] [stdout]    |
[INFO] [stdout] 44 | fn function_stuff() -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `returns_one` is never used
[INFO] [stdout]   --> src/prepackages/variables.rs:56:4
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn returns_one() -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fizz_buzz` is never used
[INFO] [stdout]   --> src/prepackages/variables.rs:60:4
[INFO] [stdout]    |
[INFO] [stdout] 60 | fn fizz_buzz(x: i32) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `loop_return` is never used
[INFO] [stdout]   --> src/prepackages/variables.rs:71:4
[INFO] [stdout]    |
[INFO] [stdout] 71 | fn loop_return(x: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `countdown` is never used
[INFO] [stdout]   --> src/prepackages/variables.rs:81:4
[INFO] [stdout]    |
[INFO] [stdout] 81 | fn countdown(loops: i32) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `for_loop` is never used
[INFO] [stdout]   --> src/prepackages/variables.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn for_loop(placement: i32) {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `range_for_loop` is never used
[INFO] [stdout]   --> src/prepackages/variables.rs:98:4
[INFO] [stdout]    |
[INFO] [stdout] 98 | fn range_for_loop(until: i32) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `reverse_range_for_loop` is never used
[INFO] [stdout]    --> src/prepackages/variables.rs:104:4
[INFO] [stdout]     |
[INFO] [stdout] 104 | fn reverse_range_for_loop(from: i32) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `IpAddrKind` is never used
[INFO] [stdout]  --> src/prepackages/enums/enums.rs:5:6
[INFO] [stdout]   |
[INFO] [stdout] 5 | enum IpAddrKind {
[INFO] [stdout]   |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ConciseIpAddr` is never used
[INFO] [stdout]   --> src/prepackages/enums/enums.rs:10:6
[INFO] [stdout]    |
[INFO] [stdout] 10 | enum ConciseIpAddr {
[INFO] [stdout]    |      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `call` is never used
[INFO] [stdout]   --> src/prepackages/enums/enums.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | impl Message {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] 25 |     fn call(&self) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `IpAddr` is never constructed
[INFO] [stdout]   --> src/prepackages/enums/enums.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | struct IpAddr {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enumerate` is never used
[INFO] [stdout]   --> src/prepackages/enums/enums.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub fn enumerate() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `UsState` is never used
[INFO] [stdout]  --> src/prepackages/enums/matching.rs:3:6
[INFO] [stdout]   |
[INFO] [stdout] 3 | enum UsState {
[INFO] [stdout]   |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Coin` is never used
[INFO] [stdout]  --> src/prepackages/enums/matching.rs:9:6
[INFO] [stdout]   |
[INFO] [stdout] 9 | enum Coin {
[INFO] [stdout]   |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `value_in_cents` is never used
[INFO] [stdout]   --> src/prepackages/enums/matching.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl Coin {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] 17 |     fn value_in_cents(&self) -> u8 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `match_stuff` is never used
[INFO] [stdout]   --> src/prepackages/enums/matching.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn match_stuff() {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `find_someone` is never used
[INFO] [stdout]   --> src/prepackages/enums/matching.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn find_someone(optionals: &[Option<i32>]) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `plus_one` is never used
[INFO] [stdout]   --> src/prepackages/enums/matching.rs:49:4
[INFO] [stdout]    |
[INFO] [stdout] 49 | fn plus_one(x: Option<i32>) -> Option<i32> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `options` is never used
[INFO] [stdout]  --> src/prepackages/enums/options.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn options() {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/lib.rs:42:21
[INFO] [stdout]    |
[INFO] [stdout] 42 |         let copy = i.clone();
[INFO] [stdout]    |                     ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `T` does not implement `Clone`, so calling `clone` on `&T` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.99s
[INFO] running `Command { std: "docker" "inspect" "ca380c76022cb531c4f7e1238a17f4cbe1278af91ce53f05502a755442853e82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca380c76022cb531c4f7e1238a17f4cbe1278af91ce53f05502a755442853e82", kill_on_drop: false }`
[INFO] [stdout] ca380c76022cb531c4f7e1238a17f4cbe1278af91ce53f05502a755442853e82
[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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3978c5d94e0d3bc4eedfcb60a94efd362cdc09e9646f22eafb5f0b07a9a4db16
[INFO] running `Command { std: "docker" "start" "-a" "3978c5d94e0d3bc4eedfcb60a94efd362cdc09e9646f22eafb5f0b07a9a4db16", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: package.licence
[INFO] [stdout] warning: function `exercise` is never used
[INFO] [stdout]  --> src/collections/exercises.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn exercise() {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `employee_registration` is never used
[INFO] [stdout]   --> src/collections/exercises.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub fn employee_registration() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `remove_employee` is never used
[INFO] [stdout]   --> src/collections/exercises.rs:70:4
[INFO] [stdout]    |
[INFO] [stdout] 70 | fn remove_employee(register: &mut HashMap<String, Vec<String>>, other_words: &mut SplitWhitespace) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `extract_full_name` is never used
[INFO] [stdout]   --> src/collections/exercises.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn extract_full_name(words: &mut SplitWhitespace, stop: &str) -> Result<String, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `register_employee` is never used
[INFO] [stdout]    --> src/collections/exercises.rs:108:4
[INFO] [stdout]     |
[INFO] [stdout] 108 | fn register_employee(register: &mut HashMap<String, Vec<String>>, other_words: &mut SplitWhitespace) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_register` is never used
[INFO] [stdout]    --> src/collections/exercises.rs:119:4
[INFO] [stdout]     |
[INFO] [stdout] 119 | fn print_register(register: &HashMap<String, Vec<String>>) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hash_it_up` is never used
[INFO] [stdout]  --> src/collections/hashmaps.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn hash_it_up() {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `string_stuff` is never used
[INFO] [stdout]  --> src/collections/strings.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn string_stuff() {
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `got_game` is never used
[INFO] [stdout]   --> src/collections/strings.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn got_game() -> String {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `to_pig_latin` is never used
[INFO] [stdout]   --> src/collections/strings.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn to_pig_latin(kosher: &String) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_vowel` is never used
[INFO] [stdout]   --> src/collections/strings.rs:53:4
[INFO] [stdout]    |
[INFO] [stdout] 53 | fn is_vowel(maybe_vowel: &char) -> bool {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Guess` is never constructed
[INFO] [stdout]  --> src/prepackages/gg.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Guess {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `value` are never used
[INFO] [stdout]   --> src/prepackages/gg.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl Guess {
[INFO] [stdout]    | ---------- associated items in this implementation
[INFO] [stdout] 11 |     pub fn new(value: i32) -> Guess {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub fn value(&self) -> i32 {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `play_the_guessing_game` is never used
[INFO] [stdout]   --> src/prepackages/gg.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub fn play_the_guessing_game() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `own` is never used
[INFO] [stdout]  --> src/prepackages/ownership.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn own() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `takes_ownership` is never used
[INFO] [stdout]   --> src/prepackages/ownership.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn takes_ownership(val: String) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `makes_copy` is never used
[INFO] [stdout]   --> src/prepackages/ownership.rs:51:4
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn makes_copy(number: i32) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `references_and_borrowing` is never used
[INFO] [stdout]   --> src/prepackages/ownership.rs:56:4
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn references_and_borrowing() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `calculate_length` is never used
[INFO] [stdout]   --> src/prepackages/ownership.rs:87:4
[INFO] [stdout]    |
[INFO] [stdout] 87 | fn calculate_length(s: &String) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `string_to_length` is never used
[INFO] [stdout]   --> src/prepackages/ownership.rs:91:4
[INFO] [stdout]    |
[INFO] [stdout] 91 | fn string_to_length(s: String) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_length` is never used
[INFO] [stdout]   --> src/prepackages/ownership.rs:95:4
[INFO] [stdout]    |
[INFO] [stdout] 95 | fn print_length(s: &String) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `legalized_modification` is never used
[INFO] [stdout]    --> src/prepackages/ownership.rs:103:4
[INFO] [stdout]     |
[INFO] [stdout] 103 | fn legalized_modification(s: &mut String) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `slice_stuff` is never used
[INFO] [stdout]    --> src/prepackages/ownership.rs:108:4
[INFO] [stdout]     |
[INFO] [stdout] 108 | fn slice_stuff() {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `slice_first_word` is never used
[INFO] [stdout]    --> src/prepackages/ownership.rs:124:4
[INFO] [stdout]     |
[INFO] [stdout] 124 | fn slice_first_word(s: &String) -> &str {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_word` is never used
[INFO] [stdout]    --> src/prepackages/ownership.rs:140:4
[INFO] [stdout]     |
[INFO] [stdout] 140 | fn first_word(s: &String) -> usize {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]  --> src/prepackages/structs.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct User {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Color` is never constructed
[INFO] [stdout]  --> src/prepackages/structs.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Color(i32, i32, i32);
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]   --> src/prepackages/structs.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Point(i32, i32, i32);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `structure` is never used
[INFO] [stdout]   --> src/prepackages/structs.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub fn structure() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_structs` is never used
[INFO] [stdout]   --> src/prepackages/structs.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn first_structs() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `build_user` is never used
[INFO] [stdout]   --> src/prepackages/structs.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn build_user(email: String, username1: String) -> User {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]   --> src/prepackages/structs.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | struct Rectangle {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Circle` is never constructed
[INFO] [stdout]   --> src/prepackages/structs.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | struct Circle {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]   --> src/prepackages/structs.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | impl Rectangle {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 60 |
[INFO] [stdout] 61 |     fn area(&self) -> u32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 65 |     fn longest_side(&self) -> u32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 72 |     fn is_square(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 77 |     fn transform_to_circle(self) -> Circle {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 81 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 85 |     fn stretch(&mut self, add_height: u32, add_width: u32) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 91 |     fn square(size: u32) -> Rectangle {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling study-crate v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `shrink` is never used
[INFO] [stdout]    --> src/prepackages/structs.rs:101:8
[INFO] [stdout]     |
[INFO] [stdout] 100 | impl Rectangle {
[INFO] [stdout]     | -------------- method in this implementation
[INFO] [stdout] 101 |     fn shrink(&mut self, take_height: u32, take_width: u32) {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rectangles` is never used
[INFO] [stdout]    --> src/prepackages/structs.rs:107:4
[INFO] [stdout]     |
[INFO] [stdout] 107 | fn rectangles() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `area` is never used
[INFO] [stdout]    --> src/prepackages/structs.rs:131:4
[INFO] [stdout]     |
[INFO] [stdout] 131 | fn area(rectangle: &Rectangle) -> u32 {
[INFO] [stdout]     |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `variate` is never used
[INFO] [stdout]  --> src/prepackages/variables.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn variate() {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `function_stuff` is never used
[INFO] [stdout]   --> src/prepackages/variables.rs:44:4
[INFO] [stdout]    |
[INFO] [stdout] 44 | fn function_stuff() -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `returns_one` is never used
[INFO] [stdout]   --> src/prepackages/variables.rs:56:4
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn returns_one() -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fizz_buzz` is never used
[INFO] [stdout]   --> src/prepackages/variables.rs:60:4
[INFO] [stdout]    |
[INFO] [stdout] 60 | fn fizz_buzz(x: i32) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `loop_return` is never used
[INFO] [stdout]   --> src/prepackages/variables.rs:71:4
[INFO] [stdout]    |
[INFO] [stdout] 71 | fn loop_return(x: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `countdown` is never used
[INFO] [stdout]   --> src/prepackages/variables.rs:81:4
[INFO] [stdout]    |
[INFO] [stdout] 81 | fn countdown(loops: i32) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `for_loop` is never used
[INFO] [stdout]   --> src/prepackages/variables.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn for_loop(placement: i32) {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `range_for_loop` is never used
[INFO] [stdout]   --> src/prepackages/variables.rs:98:4
[INFO] [stdout]    |
[INFO] [stdout] 98 | fn range_for_loop(until: i32) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `reverse_range_for_loop` is never used
[INFO] [stdout]    --> src/prepackages/variables.rs:104:4
[INFO] [stdout]     |
[INFO] [stdout] 104 | fn reverse_range_for_loop(from: i32) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `IpAddrKind` is never used
[INFO] [stdout]  --> src/prepackages/enums/enums.rs:5:6
[INFO] [stdout]   |
[INFO] [stdout] 5 | enum IpAddrKind {
[INFO] [stdout]   |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ConciseIpAddr` is never used
[INFO] [stdout]   --> src/prepackages/enums/enums.rs:10:6
[INFO] [stdout]    |
[INFO] [stdout] 10 | enum ConciseIpAddr {
[INFO] [stdout]    |      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `call` is never used
[INFO] [stdout]   --> src/prepackages/enums/enums.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | impl Message {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] 25 |     fn call(&self) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `IpAddr` is never constructed
[INFO] [stdout]   --> src/prepackages/enums/enums.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | struct IpAddr {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enumerate` is never used
[INFO] [stdout]   --> src/prepackages/enums/enums.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub fn enumerate() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `UsState` is never used
[INFO] [stdout]  --> src/prepackages/enums/matching.rs:3:6
[INFO] [stdout]   |
[INFO] [stdout] 3 | enum UsState {
[INFO] [stdout]   |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Coin` is never used
[INFO] [stdout]  --> src/prepackages/enums/matching.rs:9:6
[INFO] [stdout]   |
[INFO] [stdout] 9 | enum Coin {
[INFO] [stdout]   |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `value_in_cents` is never used
[INFO] [stdout]   --> src/prepackages/enums/matching.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl Coin {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] 17 |     fn value_in_cents(&self) -> u8 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `match_stuff` is never used
[INFO] [stdout]   --> src/prepackages/enums/matching.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn match_stuff() {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `find_someone` is never used
[INFO] [stdout]   --> src/prepackages/enums/matching.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn find_someone(optionals: &[Option<i32>]) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `plus_one` is never used
[INFO] [stdout]   --> src/prepackages/enums/matching.rs:49:4
[INFO] [stdout]    |
[INFO] [stdout] 49 | fn plus_one(x: Option<i32>) -> Option<i32> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `options` is never used
[INFO] [stdout]  --> src/prepackages/enums/options.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn options() {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/lib.rs:42:21
[INFO] [stdout]    |
[INFO] [stdout] 42 |         let copy = i.clone();
[INFO] [stdout]    |                     ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `T` does not implement `Clone`, so calling `clone` on `&T` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `exercise` is never used
[INFO] [stdout]  --> src/collections/exercises.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn exercise() {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `employee_registration` is never used
[INFO] [stdout]   --> src/collections/exercises.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub fn employee_registration() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `remove_employee` is never used
[INFO] [stdout]   --> src/collections/exercises.rs:70:4
[INFO] [stdout]    |
[INFO] [stdout] 70 | fn remove_employee(register: &mut HashMap<String, Vec<String>>, other_words: &mut SplitWhitespace) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `extract_full_name` is never used
[INFO] [stdout]   --> src/collections/exercises.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn extract_full_name(words: &mut SplitWhitespace, stop: &str) -> Result<String, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `register_employee` is never used
[INFO] [stdout]    --> src/collections/exercises.rs:108:4
[INFO] [stdout]     |
[INFO] [stdout] 108 | fn register_employee(register: &mut HashMap<String, Vec<String>>, other_words: &mut SplitWhitespace) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_register` is never used
[INFO] [stdout]    --> src/collections/exercises.rs:119:4
[INFO] [stdout]     |
[INFO] [stdout] 119 | fn print_register(register: &HashMap<String, Vec<String>>) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hash_it_up` is never used
[INFO] [stdout]  --> src/collections/hashmaps.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn hash_it_up() {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `string_stuff` is never used
[INFO] [stdout]  --> src/collections/strings.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn string_stuff() {
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `got_game` is never used
[INFO] [stdout]   --> src/collections/strings.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn got_game() -> String {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]  --> src/prepackages/gg.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Guess {
[INFO] [stdout]   |        ----- field in this struct
[INFO] [stdout] 7 |     value: i32
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `value` is never used
[INFO] [stdout]   --> src/prepackages/gg.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl Guess {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub fn value(&self) -> i32 {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `play_the_guessing_game` is never used
[INFO] [stdout]   --> src/prepackages/gg.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub fn play_the_guessing_game() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `own` is never used
[INFO] [stdout]  --> src/prepackages/ownership.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn own() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `takes_ownership` is never used
[INFO] [stdout]   --> src/prepackages/ownership.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn takes_ownership(val: String) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `makes_copy` is never used
[INFO] [stdout]   --> src/prepackages/ownership.rs:51:4
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn makes_copy(number: i32) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `references_and_borrowing` is never used
[INFO] [stdout]   --> src/prepackages/ownership.rs:56:4
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn references_and_borrowing() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `calculate_length` is never used
[INFO] [stdout]   --> src/prepackages/ownership.rs:87:4
[INFO] [stdout]    |
[INFO] [stdout] 87 | fn calculate_length(s: &String) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `string_to_length` is never used
[INFO] [stdout]   --> src/prepackages/ownership.rs:91:4
[INFO] [stdout]    |
[INFO] [stdout] 91 | fn string_to_length(s: String) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_length` is never used
[INFO] [stdout]   --> src/prepackages/ownership.rs:95:4
[INFO] [stdout]    |
[INFO] [stdout] 95 | fn print_length(s: &String) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `legalized_modification` is never used
[INFO] [stdout]    --> src/prepackages/ownership.rs:103:4
[INFO] [stdout]     |
[INFO] [stdout] 103 | fn legalized_modification(s: &mut String) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `slice_stuff` is never used
[INFO] [stdout]    --> src/prepackages/ownership.rs:108:4
[INFO] [stdout]     |
[INFO] [stdout] 108 | fn slice_stuff() {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_word` is never used
[INFO] [stdout]    --> src/prepackages/ownership.rs:140:4
[INFO] [stdout]     |
[INFO] [stdout] 140 | fn first_word(s: &String) -> usize {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]  --> src/prepackages/structs.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct User {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Color` is never constructed
[INFO] [stdout]  --> src/prepackages/structs.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Color(i32, i32, i32);
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]   --> src/prepackages/structs.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Point(i32, i32, i32);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `structure` is never used
[INFO] [stdout]   --> src/prepackages/structs.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub fn structure() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_structs` is never used
[INFO] [stdout]   --> src/prepackages/structs.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn first_structs() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `build_user` is never used
[INFO] [stdout]   --> src/prepackages/structs.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn build_user(email: String, username1: String) -> User {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]   --> src/prepackages/structs.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | struct Rectangle {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Circle` is never constructed
[INFO] [stdout]   --> src/prepackages/structs.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | struct Circle {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]   --> src/prepackages/structs.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | impl Rectangle {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 60 |
[INFO] [stdout] 61 |     fn area(&self) -> u32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 65 |     fn longest_side(&self) -> u32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 72 |     fn is_square(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 77 |     fn transform_to_circle(self) -> Circle {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 81 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 85 |     fn stretch(&mut self, add_height: u32, add_width: u32) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 91 |     fn square(size: u32) -> Rectangle {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `shrink` is never used
[INFO] [stdout]    --> src/prepackages/structs.rs:101:8
[INFO] [stdout]     |
[INFO] [stdout] 100 | impl Rectangle {
[INFO] [stdout]     | -------------- method in this implementation
[INFO] [stdout] 101 |     fn shrink(&mut self, take_height: u32, take_width: u32) {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rectangles` is never used
[INFO] [stdout]    --> src/prepackages/structs.rs:107:4
[INFO] [stdout]     |
[INFO] [stdout] 107 | fn rectangles() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `area` is never used
[INFO] [stdout]    --> src/prepackages/structs.rs:131:4
[INFO] [stdout]     |
[INFO] [stdout] 131 | fn area(rectangle: &Rectangle) -> u32 {
[INFO] [stdout]     |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `variate` is never used
[INFO] [stdout]  --> src/prepackages/variables.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn variate() {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `function_stuff` is never used
[INFO] [stdout]   --> src/prepackages/variables.rs:44:4
[INFO] [stdout]    |
[INFO] [stdout] 44 | fn function_stuff() -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `returns_one` is never used
[INFO] [stdout]   --> src/prepackages/variables.rs:56:4
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn returns_one() -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fizz_buzz` is never used
[INFO] [stdout]   --> src/prepackages/variables.rs:60:4
[INFO] [stdout]    |
[INFO] [stdout] 60 | fn fizz_buzz(x: i32) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `loop_return` is never used
[INFO] [stdout]   --> src/prepackages/variables.rs:71:4
[INFO] [stdout]    |
[INFO] [stdout] 71 | fn loop_return(x: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `countdown` is never used
[INFO] [stdout]   --> src/prepackages/variables.rs:81:4
[INFO] [stdout]    |
[INFO] [stdout] 81 | fn countdown(loops: i32) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `for_loop` is never used
[INFO] [stdout]   --> src/prepackages/variables.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn for_loop(placement: i32) {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `range_for_loop` is never used
[INFO] [stdout]   --> src/prepackages/variables.rs:98:4
[INFO] [stdout]    |
[INFO] [stdout] 98 | fn range_for_loop(until: i32) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `reverse_range_for_loop` is never used
[INFO] [stdout]    --> src/prepackages/variables.rs:104:4
[INFO] [stdout]     |
[INFO] [stdout] 104 | fn reverse_range_for_loop(from: i32) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `IpAddrKind` is never used
[INFO] [stdout]  --> src/prepackages/enums/enums.rs:5:6
[INFO] [stdout]   |
[INFO] [stdout] 5 | enum IpAddrKind {
[INFO] [stdout]   |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ConciseIpAddr` is never used
[INFO] [stdout]   --> src/prepackages/enums/enums.rs:10:6
[INFO] [stdout]    |
[INFO] [stdout] 10 | enum ConciseIpAddr {
[INFO] [stdout]    |      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `call` is never used
[INFO] [stdout]   --> src/prepackages/enums/enums.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | impl Message {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] 25 |     fn call(&self) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `IpAddr` is never constructed
[INFO] [stdout]   --> src/prepackages/enums/enums.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | struct IpAddr {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enumerate` is never used
[INFO] [stdout]   --> src/prepackages/enums/enums.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub fn enumerate() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `UsState` is never used
[INFO] [stdout]  --> src/prepackages/enums/matching.rs:3:6
[INFO] [stdout]   |
[INFO] [stdout] 3 | enum UsState {
[INFO] [stdout]   |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Coin` is never used
[INFO] [stdout]  --> src/prepackages/enums/matching.rs:9:6
[INFO] [stdout]   |
[INFO] [stdout] 9 | enum Coin {
[INFO] [stdout]   |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `value_in_cents` is never used
[INFO] [stdout]   --> src/prepackages/enums/matching.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl Coin {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] 17 |     fn value_in_cents(&self) -> u8 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `match_stuff` is never used
[INFO] [stdout]   --> src/prepackages/enums/matching.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn match_stuff() {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `find_someone` is never used
[INFO] [stdout]   --> src/prepackages/enums/matching.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn find_someone(optionals: &[Option<i32>]) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `plus_one` is never used
[INFO] [stdout]   --> src/prepackages/enums/matching.rs:49:4
[INFO] [stdout]    |
[INFO] [stdout] 49 | fn plus_one(x: Option<i32>) -> Option<i32> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `options` is never used
[INFO] [stdout]  --> src/prepackages/enums/options.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn options() {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/lib.rs:42:21
[INFO] [stdout]    |
[INFO] [stdout] 42 |         let copy = i.clone();
[INFO] [stdout]    |                     ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `T` does not implement `Clone`, so calling `clone` on `&T` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.39s
[INFO] running `Command { std: "docker" "inspect" "3978c5d94e0d3bc4eedfcb60a94efd362cdc09e9646f22eafb5f0b07a9a4db16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3978c5d94e0d3bc4eedfcb60a94efd362cdc09e9646f22eafb5f0b07a9a4db16", kill_on_drop: false }`
[INFO] [stdout] 3978c5d94e0d3bc4eedfcb60a94efd362cdc09e9646f22eafb5f0b07a9a4db16
[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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 99858ce20419d19398e00d70f7661a8a67268d2bdace389254d003f3228f18bd
[INFO] running `Command { std: "docker" "start" "-a" "99858ce20419d19398e00d70f7661a8a67268d2bdace389254d003f3228f18bd", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: package.licence
[INFO] [stderr] warning: function `exercise` is never used
[INFO] [stderr]  --> src/collections/exercises.rs:7:8
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn exercise() {
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `employee_registration` is never used
[INFO] [stderr]   --> src/collections/exercises.rs:35:8
[INFO] [stderr]    |
[INFO] [stderr] 35 | pub fn employee_registration() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `remove_employee` is never used
[INFO] [stderr]   --> src/collections/exercises.rs:70:4
[INFO] [stderr]    |
[INFO] [stderr] 70 | fn remove_employee(register: &mut HashMap<String, Vec<String>>, other_words: &mut SplitWhitespace) {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `extract_full_name` is never used
[INFO] [stderr]   --> src/collections/exercises.rs:90:4
[INFO] [stderr]    |
[INFO] [stderr] 90 | fn extract_full_name(words: &mut SplitWhitespace, stop: &str) -> Result<String, String> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `register_employee` is never used
[INFO] [stderr]    --> src/collections/exercises.rs:108:4
[INFO] [stderr]     |
[INFO] [stderr] 108 | fn register_employee(register: &mut HashMap<String, Vec<String>>, other_words: &mut SplitWhitespace) {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `print_register` is never used
[INFO] [stderr]    --> src/collections/exercises.rs:119:4
[INFO] [stderr]     |
[INFO] [stderr] 119 | fn print_register(register: &HashMap<String, Vec<String>>) {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `hash_it_up` is never used
[INFO] [stderr]  --> src/collections/hashmaps.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn hash_it_up() {
[INFO] [stderr]   |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `string_stuff` is never used
[INFO] [stderr]  --> src/collections/strings.rs:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub fn string_stuff() {
[INFO] [stderr]   |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `got_game` is never used
[INFO] [stderr]   --> src/collections/strings.rs:22:4
[INFO] [stderr]    |
[INFO] [stderr] 22 | fn got_game() -> String {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `to_pig_latin` is never used
[INFO] [stderr]   --> src/collections/strings.rs:33:8
[INFO] [stderr]    |
[INFO] [stderr] 33 | pub fn to_pig_latin(kosher: &String) -> String {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `is_vowel` is never used
[INFO] [stderr]   --> src/collections/strings.rs:53:4
[INFO] [stderr]    |
[INFO] [stderr] 53 | fn is_vowel(maybe_vowel: &char) -> bool {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Guess` is never constructed
[INFO] [stderr]  --> src/prepackages/gg.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | struct Guess {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new` and `value` are never used
[INFO] [stderr]   --> src/prepackages/gg.rs:11:12
[INFO] [stderr]    |
[INFO] [stderr] 10 | impl Guess {
[INFO] [stderr]    | ---------- associated items in this implementation
[INFO] [stderr] 11 |     pub fn new(value: i32) -> Guess {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 19 |     pub fn value(&self) -> i32 {
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `play_the_guessing_game` is never used
[INFO] [stderr]   --> src/prepackages/gg.rs:24:8
[INFO] [stderr]    |
[INFO] [stderr] 24 | pub fn play_the_guessing_game() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `own` is never used
[INFO] [stderr]  --> src/prepackages/ownership.rs:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub fn own() {
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `takes_ownership` is never used
[INFO] [stderr]   --> src/prepackages/ownership.rs:47:4
[INFO] [stderr]    |
[INFO] [stderr] 47 | fn takes_ownership(val: String) {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `makes_copy` is never used
[INFO] [stderr]   --> src/prepackages/ownership.rs:51:4
[INFO] [stderr]    |
[INFO] [stderr] 51 | fn makes_copy(number: i32) {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `references_and_borrowing` is never used
[INFO] [stderr]   --> src/prepackages/ownership.rs:56:4
[INFO] [stderr]    |
[INFO] [stderr] 56 | fn references_and_borrowing() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `calculate_length` is never used
[INFO] [stderr]   --> src/prepackages/ownership.rs:87:4
[INFO] [stderr]    |
[INFO] [stderr] 87 | fn calculate_length(s: &String) -> usize {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `string_to_length` is never used
[INFO] [stderr]   --> src/prepackages/ownership.rs:91:4
[INFO] [stderr]    |
[INFO] [stderr] 91 | fn string_to_length(s: String) -> usize {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `print_length` is never used
[INFO] [stderr]   --> src/prepackages/ownership.rs:95:4
[INFO] [stderr]    |
[INFO] [stderr] 95 | fn print_length(s: &String) {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `legalized_modification` is never used
[INFO] [stderr]    --> src/prepackages/ownership.rs:103:4
[INFO] [stderr]     |
[INFO] [stderr] 103 | fn legalized_modification(s: &mut String) {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `slice_stuff` is never used
[INFO] [stderr]    --> src/prepackages/ownership.rs:108:4
[INFO] [stderr]     |
[INFO] [stderr] 108 | fn slice_stuff() {
[INFO] [stderr]     |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `slice_first_word` is never used
[INFO] [stderr]    --> src/prepackages/ownership.rs:124:4
[INFO] [stderr]     |
[INFO] [stderr] 124 | fn slice_first_word(s: &String) -> &str {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `first_word` is never used
[INFO] [stderr]    --> src/prepackages/ownership.rs:140:4
[INFO] [stderr]     |
[INFO] [stderr] 140 | fn first_word(s: &String) -> usize {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `User` is never constructed
[INFO] [stderr]  --> src/prepackages/structs.rs:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 | struct User {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Color` is never constructed
[INFO] [stderr]  --> src/prepackages/structs.rs:9:8
[INFO] [stderr]   |
[INFO] [stderr] 9 | struct Color(i32, i32, i32);
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Point` is never constructed
[INFO] [stderr]   --> src/prepackages/structs.rs:10:8
[INFO] [stderr]    |
[INFO] [stderr] 10 | struct Point(i32, i32, i32);
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `structure` is never used
[INFO] [stderr]   --> src/prepackages/structs.rs:12:8
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub fn structure() {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `first_structs` is never used
[INFO] [stderr]   --> src/prepackages/structs.rs:19:4
[INFO] [stderr]    |
[INFO] [stderr] 19 | fn first_structs() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `build_user` is never used
[INFO] [stderr]   --> src/prepackages/structs.rs:39:4
[INFO] [stderr]    |
[INFO] [stderr] 39 | fn build_user(email: String, username1: String) -> User {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Rectangle` is never constructed
[INFO] [stderr]   --> src/prepackages/structs.rs:49:8
[INFO] [stderr]    |
[INFO] [stderr] 49 | struct Rectangle {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Circle` is never constructed
[INFO] [stderr]   --> src/prepackages/structs.rs:55:8
[INFO] [stderr]    |
[INFO] [stderr] 55 | struct Circle {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: multiple associated items are never used
[INFO] [stderr]   --> src/prepackages/structs.rs:61:8
[INFO] [stderr]    |
[INFO] [stderr] 59 | impl Rectangle {
[INFO] [stderr]    | -------------- associated items in this implementation
[INFO] [stderr] 60 |
[INFO] [stderr] 61 |     fn area(&self) -> u32 {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 65 |     fn longest_side(&self) -> u32 {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 72 |     fn is_square(&self) -> bool {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 77 |     fn transform_to_circle(self) -> Circle {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 81 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 85 |     fn stretch(&mut self, add_height: u32, add_width: u32) {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 91 |     fn square(size: u32) -> Rectangle {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `shrink` is never used
[INFO] [stderr]    --> src/prepackages/structs.rs:101:8
[INFO] [stderr]     |
[INFO] [stderr] 100 | impl Rectangle {
[INFO] [stderr]     | -------------- method in this implementation
[INFO] [stderr] 101 |     fn shrink(&mut self, take_height: u32, take_width: u32) {
[INFO] [stderr]     |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `rectangles` is never used
[INFO] [stderr]    --> src/prepackages/structs.rs:107:4
[INFO] [stderr]     |
[INFO] [stderr] 107 | fn rectangles() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `area` is never used
[INFO] [stderr]    --> src/prepackages/structs.rs:131:4
[INFO] [stderr]     |
[INFO] [stderr] 131 | fn area(rectangle: &Rectangle) -> u32 {
[INFO] [stderr]     |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `variate` is never used
[INFO] [stderr]  --> src/prepackages/variables.rs:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub fn variate() {
[INFO] [stderr]   |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `function_stuff` is never used
[INFO] [stderr]   --> src/prepackages/variables.rs:44:4
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn function_stuff() -> i32 {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `returns_one` is never used
[INFO] [stderr]   --> src/prepackages/variables.rs:56:4
[INFO] [stderr]    |
[INFO] [stderr] 56 | fn returns_one() -> i32 {
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `fizz_buzz` is never used
[INFO] [stderr]   --> src/prepackages/variables.rs:60:4
[INFO] [stderr]    |
[INFO] [stderr] 60 | fn fizz_buzz(x: i32) {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `loop_return` is never used
[INFO] [stderr]   --> src/prepackages/variables.rs:71:4
[INFO] [stderr]    |
[INFO] [stderr] 71 | fn loop_return(x: i32) -> i32 {
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `countdown` is never used
[INFO] [stderr]   --> src/prepackages/variables.rs:81:4
[INFO] [stderr]    |
[INFO] [stderr] 81 | fn countdown(loops: i32) {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `for_loop` is never used
[INFO] [stderr]   --> src/prepackages/variables.rs:90:4
[INFO] [stderr]    |
[INFO] [stderr] 90 | fn for_loop(placement: i32) {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `range_for_loop` is never used
[INFO] [stderr]   --> src/prepackages/variables.rs:98:4
[INFO] [stderr]    |
[INFO] [stderr] 98 | fn range_for_loop(until: i32) {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `reverse_range_for_loop` is never used
[INFO] [stderr]    --> src/prepackages/variables.rs:104:4
[INFO] [stderr]     |
[INFO] [stderr] 104 | fn reverse_range_for_loop(from: i32) {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `IpAddrKind` is never used
[INFO] [stderr]  --> src/prepackages/enums/enums.rs:5:6
[INFO] [stderr]   |
[INFO] [stderr] 5 | enum IpAddrKind {
[INFO] [stderr]   |      ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `ConciseIpAddr` is never used
[INFO] [stderr]   --> src/prepackages/enums/enums.rs:10:6
[INFO] [stderr]    |
[INFO] [stderr] 10 | enum ConciseIpAddr {
[INFO] [stderr]    |      ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `call` is never used
[INFO] [stderr]   --> src/prepackages/enums/enums.rs:25:8
[INFO] [stderr]    |
[INFO] [stderr] 24 | impl Message {
[INFO] [stderr]    | ------------ method in this implementation
[INFO] [stderr] 25 |     fn call(&self) {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `IpAddr` is never constructed
[INFO] [stderr]   --> src/prepackages/enums/enums.rs:37:8
[INFO] [stderr]    |
[INFO] [stderr] 37 | struct IpAddr {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `enumerate` is never used
[INFO] [stderr]   --> src/prepackages/enums/enums.rs:42:8
[INFO] [stderr]    |
[INFO] [stderr] 42 | pub fn enumerate() {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `UsState` is never used
[INFO] [stderr]  --> src/prepackages/enums/matching.rs:3:6
[INFO] [stderr]   |
[INFO] [stderr] 3 | enum UsState {
[INFO] [stderr]   |      ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `Coin` is never used
[INFO] [stderr]  --> src/prepackages/enums/matching.rs:9:6
[INFO] [stderr]   |
[INFO] [stderr] 9 | enum Coin {
[INFO] [stderr]   |      ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `value_in_cents` is never used
[INFO] [stderr]   --> src/prepackages/enums/matching.rs:17:8
[INFO] [stderr]    |
[INFO] [stderr] 16 | impl Coin {
[INFO] [stderr]    | --------- method in this implementation
[INFO] [stderr] 17 |     fn value_in_cents(&self) -> u8 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `match_stuff` is never used
[INFO] [stderr]   --> src/prepackages/enums/matching.rs:33:8
[INFO] [stderr]    |
[INFO] [stderr] 33 | pub fn match_stuff() {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `find_someone` is never used
[INFO] [stderr]   --> src/prepackages/enums/matching.rs:41:4
[INFO] [stderr]    |
[INFO] [stderr] 41 | fn find_someone(optionals: &[Option<i32>]) {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `plus_one` is never used
[INFO] [stderr]   --> src/prepackages/enums/matching.rs:49:4
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn plus_one(x: Option<i32>) -> Option<i32> {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `options` is never used
[INFO] [stderr]  --> src/prepackages/enums/options.rs:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub fn options() {
[INFO] [stderr]   |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stderr]   --> src/lib.rs:42:21
[INFO] [stderr]    |
[INFO] [stderr] 42 |         let copy = i.clone();
[INFO] [stderr]    |                     ^^^^^^^^ help: remove this redundant call
[INFO] [stderr]    |
[INFO] [stderr]    = note: the type `T` does not implement `Clone`, so calling `clone` on `&T` copies the reference, which does not do anything and can be removed
[INFO] [stderr]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `value` is never read
[INFO] [stderr]  --> src/prepackages/gg.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | struct Guess {
[INFO] [stderr]   |        ----- field in this struct
[INFO] [stderr] 7 |     value: i32
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `value` is never used
[INFO] [stderr]   --> src/prepackages/gg.rs:19:12
[INFO] [stderr]    |
[INFO] [stderr] 10 | impl Guess {
[INFO] [stderr]    | ---------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 19 |     pub fn value(&self) -> i32 {
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `study-crate` (lib) generated 59 warnings (run `cargo fix --lib -p study-crate` to apply 1 suggestion)
[INFO] [stderr] warning: `study-crate` (lib test) generated 56 warnings (54 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/study_crate-5515efd2054a794d)
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test collections::strings::tests::to_pig_latin_identifies_consonant ... ok
[INFO] [stdout] test prepackages::ownership::tests::slice_first_word_returns_entire_word ... ok
[INFO] [stdout] test collections::strings::tests::to_pig_latin_identifies_vowel ... ok
[INFO] [stdout] test collections::strings::tests::to_pig_latin_identifies_pseudo_vowel ... ok
[INFO] [stdout] test prepackages::ownership::tests::slice_first_word_returns_first ... ok
[INFO] [stdout] test tests::find_mode_chars ... ok
[INFO] [stdout] test prepackages::gg::tests::panics_on_smaller_than_1 - should panic ... ok
[INFO] [stdout] test prepackages::gg::tests::panics_on_greater_than_100 - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.06s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/study_crate-02312b5c7c11da9a)
[INFO] [stdout] 
[INFO] [stdout] running 36 tests
[INFO] [stdout] test collections::strings::tests::to_pig_latin_identifies_consonant ... ok
[INFO] [stdout] test collections::strings::tests::to_pig_latin_identifies_pseudo_vowel ... ok
[INFO] [stdout] test collections::strings::tests::to_pig_latin_identifies_vowel ... ok
[INFO] [stdout] test concurrent::channel::tests::test_the_waters ... ok
[INFO] [stdout] test concurrent::lock::tests::test_get_that_lock ... ok
[INFO] [stdout] test fp::closures::tests::move_value_closure ... ok
[INFO] [stdout] test fp::patterns::tests::be_unintuitive ... ok
[INFO] [stdout] test concurrent::classic::tests::vec_moves ... ok
[INFO] [stdout] test generics::functions::tests::test_find_largest ... ok
[INFO] [stdout] test oop::rust_states_lib::tests::test_private_constructor ... ok
[INFO] [stdout] test oop::states::tests::test_blog_lifecycle ... ok
[INFO] [stdout] test oop::rust_states_lib::tests::test_blog_lifecycle ... ok
[INFO] [stdout] test pointers::smart::tests::create_cons_list ... ok
[INFO] [stdout] test fp::patterns::tests::destructure_tuple ... ok
[INFO] [stdout] test pointers::smart::tests::diy_box ... ok
[INFO] [stdout] test pointers::smart::tests::box_vs_pointer ... ok
[INFO] [stdout] test fp::closures::tests::call_with_different_values ... ok
[INFO] [stdout] test fp::patterns::tests::call_destructuring_function ... ok
[INFO] [stdout] test pointers::smart::tests::multiple_references_cons ... ok
[INFO] [stdout] test pointers::smart::tests::say_hello ... ok
[INFO] [stdout] test pointers::smart::tests::early_drop ... ok
[INFO] [stdout] test pointers::smart::tests::first_box ... ok
[INFO] [stdout] test prepackages::ownership::tests::slice_first_word_returns_entire_word ... ok
[INFO] [stdout] test pointers::smart::tests::drop_it_like_it_is_out_of_scope ... ok
[INFO] [stdout] test concurrent::classic::tests::concurrency_is_black_magic ... ok
[INFO] [stdout] test concurrent::lock::tests::test_contested_lock ... ok
[INFO] [stdout] test exceptions::tests::test_succinct_read ... FAILED
[INFO] [stdout] test prepackages::gg::tests::panics_on_greater_than_100 - should panic ... ok
[INFO] [stdout] test prepackages::gg::tests::panics_on_smaller_than_1 - should panic ... ok
[INFO] [stdout] test prepackages::ownership::tests::slice_first_word_returns_first ... ok
[INFO] [stdout] test exceptions::tests::test_read_username_from_file ... FAILED
[INFO] [stdout] test fp::closures::tests::returns_cached_value ... ok
[INFO] [stdout] test fp::closures::tests::simulated_expensive_calculation_closure ... ok
[INFO] [stdout] test fp::closures::tests::insanity_is_accepted ... ok
[INFO] [stdout] test concurrent::channel::tests::get_out_to_sea ... ok
[INFO] [stdout] test concurrent::channel::tests::get_far_out ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- exceptions::tests::test_succinct_read stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'exceptions::tests::test_succinct_read' (48) panicked at src/exceptions.rs:85:9:
[INFO] [stdout] assertion failed: result.is_ok()
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x55ead638ecc2 - std[3f03f8b59f91bef1]::backtrace_rs::backtrace::libunwind::trace
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x55ead638ecc2 - std[3f03f8b59f91bef1]::backtrace_rs::backtrace::trace_unsynchronized::<std[3f03f8b59f91bef1]::sys::backtrace::_print_fmt::{closure#1}>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x55ead638ecc2 - std[3f03f8b59f91bef1]::sys::backtrace::_print_fmt
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/sys/backtrace.rs:74:9
[INFO] [stdout]    3:     0x55ead638ecc2 - <<std[3f03f8b59f91bef1]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[585f66e14d78f9ba]::fmt::Display>::fmt
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/sys/backtrace.rs:44:26
[INFO] [stdout]    4:     0x55ead63a35ca - <core[585f66e14d78f9ba]::fmt::rt::Argument>::fmt
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/fmt/rt.rs:152:76
[INFO] [stdout]    5:     0x55ead63a35ca - core[585f66e14d78f9ba]::fmt::write
[INFO] [stdout]    6:     0x55ead6393ae6 - std[3f03f8b59f91bef1]::io::default_write_fmt::<alloc[15e7b27aba85d2e2]::vec::Vec<u8>>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x55ead6393ae6 - <alloc[15e7b27aba85d2e2]::vec::Vec<u8> as std[3f03f8b59f91bef1]::io::Write>::write_fmt
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/io/mod.rs:1994:13
[INFO] [stdout]    8:     0x55ead636cfef - <std[3f03f8b59f91bef1]::sys::backtrace::BacktraceLock>::print
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/sys/backtrace.rs:47:9
[INFO] [stdout]    9:     0x55ead636cfef - std[3f03f8b59f91bef1]::panicking::default_hook::{closure#0}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:292:27
[INFO] [stdout]   10:     0x55ead6386b89 - std[3f03f8b59f91bef1]::panicking::default_hook
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:316:9
[INFO] [stdout]   11:     0x55ead632101e - <alloc[15e7b27aba85d2e2]::boxed::Box<dyn for<'a, 'b> core[585f66e14d78f9ba]::ops::function::Fn<(&'a std[3f03f8b59f91bef1]::panic::PanicHookInfo<'b>,), Output = ()> + core[585f66e14d78f9ba]::marker::Sync + core[585f66e14d78f9ba]::marker::Send> as core[585f66e14d78f9ba]::ops::function::Fn<(&std[3f03f8b59f91bef1]::panic::PanicHookInfo,)>>::call
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/alloc/src/boxed.rs:2220:9
[INFO] [stdout]   12:     0x55ead632101e - test[30224e0cb089acd2]::test_main_with_exit_callback::<test[30224e0cb089acd2]::test_main::{closure#0}>::{closure#0}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x55ead6386d42 - <alloc[15e7b27aba85d2e2]::boxed::Box<dyn for<'a, 'b> core[585f66e14d78f9ba]::ops::function::Fn<(&'a std[3f03f8b59f91bef1]::panic::PanicHookInfo<'b>,), Output = ()> + core[585f66e14d78f9ba]::marker::Sync + core[585f66e14d78f9ba]::marker::Send> as core[585f66e14d78f9ba]::ops::function::Fn<(&std[3f03f8b59f91bef1]::panic::PanicHookInfo,)>>::call
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/alloc/src/boxed.rs:2220:9
[INFO] [stdout]   14:     0x55ead6386d42 - std[3f03f8b59f91bef1]::panicking::panic_with_hook
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:833:13
[INFO] [stdout]   15:     0x55ead636d0da - std[3f03f8b59f91bef1]::panicking::panic_handler::{closure#0}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:691:13
[INFO] [stdout]   16:     0x55ead6362199 - std[3f03f8b59f91bef1]::sys::backtrace::__rust_end_short_backtrace::<std[3f03f8b59f91bef1]::panicking::panic_handler::{closure#0}, !>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/sys/backtrace.rs:182:18
[INFO] [stdout]   17:     0x55ead636defd - __rustc[caa99d26c7bae192]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:689:5
[INFO] [stdout]   18:     0x55ead63a3cdc - core[585f66e14d78f9ba]::panicking::panic_fmt
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/panicking.rs:80:14
[INFO] [stdout]   19:     0x55ead63a3ca2 - core[585f66e14d78f9ba]::panicking::panic
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/panicking.rs:150:5
[INFO] [stdout]   20:     0x55ead62fc4f9 - study_crate[99ece95526e67108]::exceptions::tests::test_succinct_read
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exceptions.rs:85:9
[INFO] [stdout]   21:     0x55ead62fae77 - study_crate[99ece95526e67108]::exceptions::tests::test_succinct_read::{closure#0}
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exceptions.rs:83:28
[INFO] [stdout]   22:     0x55ead63030e6 - <study_crate[99ece95526e67108]::exceptions::tests::test_succinct_read::{closure#0} as core[585f66e14d78f9ba]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x55ead63153cb - <fn() -> core[585f66e14d78f9ba]::result::Result<(), alloc[15e7b27aba85d2e2]::string::String> as core[585f66e14d78f9ba]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x55ead63153cb - test[30224e0cb089acd2]::__rust_begin_short_backtrace::<core[585f66e14d78f9ba]::result::Result<(), alloc[15e7b27aba85d2e2]::string::String>, fn() -> core[585f66e14d78f9ba]::result::Result<(), alloc[15e7b27aba85d2e2]::string::String>>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/test/src/lib.rs:663:18
[INFO] [stdout]   25:     0x55ead6321c2a - test[30224e0cb089acd2]::run_test_in_process::{closure#0}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/test/src/lib.rs:686:74
[INFO] [stdout]   26:     0x55ead6321c2a - <core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<test[30224e0cb089acd2]::run_test_in_process::{closure#0}> as core[585f66e14d78f9ba]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   27:     0x55ead6321c2a - std[3f03f8b59f91bef1]::panicking::catch_unwind::do_call::<core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<test[30224e0cb089acd2]::run_test_in_process::{closure#0}>, core[585f66e14d78f9ba]::result::Result<(), alloc[15e7b27aba85d2e2]::string::String>>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:581:40
[INFO] [stdout]   28:     0x55ead6321c2a - std[3f03f8b59f91bef1]::panicking::catch_unwind::<core[585f66e14d78f9ba]::result::Result<(), alloc[15e7b27aba85d2e2]::string::String>, core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<test[30224e0cb089acd2]::run_test_in_process::{closure#0}>>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:544:19
[INFO] [stdout]   29:     0x55ead6321c2a - std[3f03f8b59f91bef1]::panic::catch_unwind::<core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<test[30224e0cb089acd2]::run_test_in_process::{closure#0}>, core[585f66e14d78f9ba]::result::Result<(), alloc[15e7b27aba85d2e2]::string::String>>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panic.rs:359:14
[INFO] [stdout]   30:     0x55ead6321c2a - test[30224e0cb089acd2]::run_test_in_process
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/test/src/lib.rs:686:27
[INFO] [stdout]   31:     0x55ead6321c2a - test[30224e0cb089acd2]::run_test::{closure#0}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/test/src/lib.rs:607:43
[INFO] [stdout]   32:     0x55ead631c0f4 - test[30224e0cb089acd2]::run_test::{closure#1}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/test/src/lib.rs:637:41
[INFO] [stdout]   33:     0x55ead631c0f4 - std[3f03f8b59f91bef1]::sys::backtrace::__rust_begin_short_backtrace::<test[30224e0cb089acd2]::run_test::{closure#1}, ()>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/sys/backtrace.rs:166:18
[INFO] [stdout]   34:     0x55ead6324722 - std[3f03f8b59f91bef1]::thread::lifecycle::spawn_unchecked::<test[30224e0cb089acd2]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/thread/lifecycle.rs:91:13
[INFO] [stdout]   35:     0x55ead6324722 - <core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<std[3f03f8b59f91bef1]::thread::lifecycle::spawn_unchecked<test[30224e0cb089acd2]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}> as core[585f66e14d78f9ba]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   36:     0x55ead6324722 - std[3f03f8b59f91bef1]::panicking::catch_unwind::do_call::<core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<std[3f03f8b59f91bef1]::thread::lifecycle::spawn_unchecked<test[30224e0cb089acd2]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:581:40
[INFO] [stdout]   37:     0x55ead6324722 - std[3f03f8b59f91bef1]::panicking::catch_unwind::<(), core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<std[3f03f8b59f91bef1]::thread::lifecycle::spawn_unchecked<test[30224e0cb089acd2]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:544:19
[INFO] [stdout]   38:     0x55ead6324722 - std[3f03f8b59f91bef1]::panic::catch_unwind::<core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<std[3f03f8b59f91bef1]::thread::lifecycle::spawn_unchecked<test[30224e0cb089acd2]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panic.rs:359:14
[INFO] [stdout]   39:     0x55ead6324722 - std[3f03f8b59f91bef1]::thread::lifecycle::spawn_unchecked::<test[30224e0cb089acd2]::run_test::{closure#1}, ()>::{closure#1}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/thread/lifecycle.rs:89:26
[INFO] [stdout]   40:     0x55ead6324722 - <std[3f03f8b59f91bef1]::thread::lifecycle::spawn_unchecked<test[30224e0cb089acd2]::run_test::{closure#1}, ()>::{closure#1} as core[585f66e14d78f9ba]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   41:     0x55ead638e1cf - <alloc[15e7b27aba85d2e2]::boxed::Box<dyn core[585f66e14d78f9ba]::ops::function::FnOnce<(), Output = ()> + core[585f66e14d78f9ba]::marker::Send> as core[585f66e14d78f9ba]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/alloc/src/boxed.rs:2206:9
[INFO] [stdout]   42:     0x55ead638e1cf - <std[3f03f8b59f91bef1]::sys::thread::unix::Thread>::new::thread_start
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/sys/thread/unix.rs:119:17
[INFO] [stdout]   43:     0x7cc766ebcaa4 - <unknown>
[INFO] [stdout]   44:     0x7cc766f49a64 - clone
[INFO] [stdout]   45:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- exceptions::tests::test_read_username_from_file stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'exceptions::tests::test_read_username_from_file' (47) panicked at src/exceptions.rs:78:9:
[INFO] [stdout] assertion failed: result.is_ok()
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x55ead638ecc2 - std[3f03f8b59f91bef1]::backtrace_rs::backtrace::libunwind::trace
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x55ead638ecc2 - std[3f03f8b59f91bef1]::backtrace_rs::backtrace::trace_unsynchronized::<std[3f03f8b59f91bef1]::sys::backtrace::_print_fmt::{closure#1}>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x55ead638ecc2 - std[3f03f8b59f91bef1]::sys::backtrace::_print_fmt
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/sys/backtrace.rs:74:9
[INFO] [stdout]    3:     0x55ead638ecc2 - <<std[3f03f8b59f91bef1]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[585f66e14d78f9ba]::fmt::Display>::fmt
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/sys/backtrace.rs:44:26
[INFO] [stdout]    4:     0x55ead63a35ca - <core[585f66e14d78f9ba]::fmt::rt::Argument>::fmt
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/fmt/rt.rs:152:76
[INFO] [stdout]    5:     0x55ead63a35ca - core[585f66e14d78f9ba]::fmt::write
[INFO] [stdout]    6:     0x55ead6393ae6 - std[3f03f8b59f91bef1]::io::default_write_fmt::<alloc[15e7b27aba85d2e2]::vec::Vec<u8>>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x55ead6393ae6 - <alloc[15e7b27aba85d2e2]::vec::Vec<u8> as std[3f03f8b59f91bef1]::io::Write>::write_fmt
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/io/mod.rs:1994:13
[INFO] [stdout]    8:     0x55ead636cfef - <std[3f03f8b59f91bef1]::sys::backtrace::BacktraceLock>::print
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/sys/backtrace.rs:47:9
[INFO] [stdout]    9:     0x55ead636cfef - std[3f03f8b59f91bef1]::panicking::default_hook::{closure#0}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:292:27
[INFO] [stdout]   10:     0x55ead6386b89 - std[3f03f8b59f91bef1]::panicking::default_hook
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:316:9
[INFO] [stdout]   11:     0x55ead632101e - <alloc[15e7b27aba85d2e2]::boxed::Box<dyn for<'a, 'b> core[585f66e14d78f9ba]::ops::function::Fn<(&'a std[3f03f8b59f91bef1]::panic::PanicHookInfo<'b>,), Output = ()> + core[585f66e14d78f9ba]::marker::Sync + core[585f66e14d78f9ba]::marker::Send> as core[585f66e14d78f9ba]::ops::function::Fn<(&std[3f03f8b59f91bef1]::panic::PanicHookInfo,)>>::call
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/alloc/src/boxed.rs:2220:9
[INFO] [stdout]   12:     0x55ead632101e - test[30224e0cb089acd2]::test_main_with_exit_callback::<test[30224e0cb089acd2]::test_main::{closure#0}>::{closure#0}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x55ead6386d42 - <alloc[15e7b27aba85d2e2]::boxed::Box<dyn for<'a, 'b> core[585f66e14d78f9ba]::ops::function::Fn<(&'a std[3f03f8b59f91bef1]::panic::PanicHookInfo<'b>,), Output = ()> + core[585f66e14d78f9ba]::marker::Sync + core[585f66e14d78f9ba]::marker::Send> as core[585f66e14d78f9ba]::ops::function::Fn<(&std[3f03f8b59f91bef1]::panic::PanicHookInfo,)>>::call
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/alloc/src/boxed.rs:2220:9
[INFO] [stdout]   14:     0x55ead6386d42 - std[3f03f8b59f91bef1]::panicking::panic_with_hook
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:833:13
[INFO] [stdout]   15:     0x55ead636d0da - std[3f03f8b59f91bef1]::panicking::panic_handler::{closure#0}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:691:13
[INFO] [stdout]   16:     0x55ead6362199 - std[3f03f8b59f91bef1]::sys::backtrace::__rust_end_short_backtrace::<std[3f03f8b59f91bef1]::panicking::panic_handler::{closure#0}, !>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/sys/backtrace.rs:182:18
[INFO] [stdout]   17:     0x55ead636defd - __rustc[caa99d26c7bae192]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:689:5
[INFO] [stdout]   18:     0x55ead63a3cdc - core[585f66e14d78f9ba]::panicking::panic_fmt
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/panicking.rs:80:14
[INFO] [stdout]   19:     0x55ead63a3ca2 - core[585f66e14d78f9ba]::panicking::panic
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/panicking.rs:150:5
[INFO] [stdout]   20:     0x55ead62fc739 - study_crate[99ece95526e67108]::exceptions::tests::test_read_username_from_file
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exceptions.rs:78:9
[INFO] [stdout]   21:     0x55ead62faea7 - study_crate[99ece95526e67108]::exceptions::tests::test_read_username_from_file::{closure#0}
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exceptions.rs:76:38
[INFO] [stdout]   22:     0x55ead6303126 - <study_crate[99ece95526e67108]::exceptions::tests::test_read_username_from_file::{closure#0} as core[585f66e14d78f9ba]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x55ead63153cb - <fn() -> core[585f66e14d78f9ba]::result::Result<(), alloc[15e7b27aba85d2e2]::string::String> as core[585f66e14d78f9ba]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x55ead63153cb - test[30224e0cb089acd2]::__rust_begin_short_backtrace::<core[585f66e14d78f9ba]::result::Result<(), alloc[15e7b27aba85d2e2]::string::String>, fn() -> core[585f66e14d78f9ba]::result::Result<(), alloc[15e7b27aba85d2e2]::string::String>>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/test/src/lib.rs:663:18
[INFO] [stdout]   25:     0x55ead6321c2a - test[30224e0cb089acd2]::run_test_in_process::{closure#0}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/test/src/lib.rs:686:74
[INFO] [stdout]   26:     0x55ead6321c2a - <core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<test[30224e0cb089acd2]::run_test_in_process::{closure#0}> as core[585f66e14d78f9ba]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   27:     0x55ead6321c2a - std[3f03f8b59f91bef1]::panicking::catch_unwind::do_call::<core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<test[30224e0cb089acd2]::run_test_in_process::{closure#0}>, core[585f66e14d78f9ba]::result::Result<(), alloc[15e7b27aba85d2e2]::string::String>>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:581:40
[INFO] [stdout]   28:     0x55ead6321c2a - std[3f03f8b59f91bef1]::panicking::catch_unwind::<core[585f66e14d78f9ba]::result::Result<(), alloc[15e7b27aba85d2e2]::string::String>, core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<test[30224e0cb089acd2]::run_test_in_process::{closure#0}>>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:544:19
[INFO] [stdout]   29:     0x55ead6321c2a - std[3f03f8b59f91bef1]::panic::catch_unwind::<core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<test[30224e0cb089acd2]::run_test_in_process::{closure#0}>, core[585f66e14d78f9ba]::result::Result<(), alloc[15e7b27aba85d2e2]::string::String>>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panic.rs:359:14
[INFO] [stdout]   30:     0x55ead6321c2a - test[30224e0cb089acd2]::run_test_in_process
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/test/src/lib.rs:686:27
[INFO] [stdout]   31:     0x55ead6321c2a - test[30224e0cb089acd2]::run_test::{closure#0}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/test/src/lib.rs:607:43
[INFO] [stdout]   32:     0x55ead631c0f4 - test[30224e0cb089acd2]::run_test::{closure#1}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/test/src/lib.rs:637:41
[INFO] [stdout]   33:     0x55ead631c0f4 - std[3f03f8b59f91bef1]::sys::backtrace::__rust_begin_short_backtrace::<test[30224e0cb089acd2]::run_test::{closure#1}, ()>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/sys/backtrace.rs:166:18
[INFO] [stdout]   34:     0x55ead6324722 - std[3f03f8b59f91bef1]::thread::lifecycle::spawn_unchecked::<test[30224e0cb089acd2]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/thread/lifecycle.rs:91:13
[INFO] [stdout]   35:     0x55ead6324722 - <core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<std[3f03f8b59f91bef1]::thread::lifecycle::spawn_unchecked<test[30224e0cb089acd2]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}> as core[585f66e14d78f9ba]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   36:     0x55ead6324722 - std[3f03f8b59f91bef1]::panicking::catch_unwind::do_call::<core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<std[3f03f8b59f91bef1]::thread::lifecycle::spawn_unchecked<test[30224e0cb089acd2]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:581:40
[INFO] [stdout]   37:     0x55ead6324722 - std[3f03f8b59f91bef1]::panicking::catch_unwind::<(), core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<std[3f03f8b59f91bef1]::thread::lifecycle::spawn_unchecked<test[30224e0cb089acd2]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:544:19
[INFO] [stdout]   38:     0x55ead6324722 - std[3f03f8b59f91bef1]::panic::catch_unwind::<core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<std[3f03f8b59f91bef1]::thread::lifecycle::spawn_unchecked<test[30224e0cb089acd2]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panic.rs:359:14
[INFO] [stdout]   39:     0x55ead6324722 - std[3f03f8b59f91bef1]::thread::lifecycle::spawn_unchecked::<test[30224e0cb089acd2]::run_test::{closure#1}, ()>::{closure#1}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/thread/lifecycle.rs:89:26
[INFO] [stdout]   40:     0x55ead6324722 - <std[3f03f8b59f91bef1]::thread::lifecycle::spawn_unchecked<test[30224e0cb089acd2]::run_test::{closure#1}, ()>::{closure#1} as core[585f66e14d78f9ba]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   41:     0x55ead638e1cf - <alloc[15e7b27aba85d2e2]::boxed::Box<dyn core[585f66e14d78f9ba]::ops::function::FnOnce<(), Output = ()> + core[585f66e14d78f9ba]::marker::Send> as core[585f66e14d78f9ba]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/alloc/src/boxed.rs:2206:9
[INFO] [stdout]   42:     0x55ead638e1cf - <std[3f03f8b59f91bef1]::sys::thread::unix::Thread>::new::thread_start
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/sys/thread/unix.rs:119:17
[INFO] [stdout]   43:     0x7cc766ebcaa4 - <unknown>
[INFO] [stdout]   44:     0x7cc766f49a64 - clone
[INFO] [stdout]   45:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     exceptions::tests::test_read_username_from_file
[INFO] [stdout]     exceptions::tests::test_succinct_read
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 34 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 4.03s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin study-crate`
[INFO] running `Command { std: "docker" "inspect" "99858ce20419d19398e00d70f7661a8a67268d2bdace389254d003f3228f18bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99858ce20419d19398e00d70f7661a8a67268d2bdace389254d003f3228f18bd", kill_on_drop: false }`
[INFO] [stdout] 99858ce20419d19398e00d70f7661a8a67268d2bdace389254d003f3228f18bd
