[INFO] cloning repository https://github.com/Legend101Zz/rust-bot
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Legend101Zz/rust-bot" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLegend101Zz%2Frust-bot", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLegend101Zz%2Frust-bot'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 00cd374209285847dc2861af717d47b913038ad4
[INFO] testing Legend101Zz/rust-bot against master#1871252fc8bb672d40787e67404e6eaae7059369 for pr-125151
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLegend101Zz%2Frust-bot" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Legend101Zz/rust-bot on toolchain 1871252fc8bb672d40787e67404e6eaae7059369
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Legend101Zz/rust-bot
[INFO] finished tweaking git repo https://github.com/Legend101Zz/rust-bot
[INFO] tweaked toml for git repo https://github.com/Legend101Zz/rust-bot written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Legend101Zz/rust-bot already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ed845d9a514dc5ba5c0985af9001c0f653ac5cf653dda2d9ebf720082de5b167
[INFO] running `Command { std: "docker" "start" "-a" "ed845d9a514dc5ba5c0985af9001c0f653ac5cf653dda2d9ebf720082de5b167", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ed845d9a514dc5ba5c0985af9001c0f653ac5cf653dda2d9ebf720082de5b167", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed845d9a514dc5ba5c0985af9001c0f653ac5cf653dda2d9ebf720082de5b167", kill_on_drop: false }`
[INFO] [stdout] ed845d9a514dc5ba5c0985af9001c0f653ac5cf653dda2d9ebf720082de5b167
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
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[INFO] [stdout] warning: type `linked_list` should have an upper camel case name
[INFO] [stdout]  --> src/m12_linked_list.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct linked_list {
[INFO] [stdout]   |        ^^^^^^^^^^^ help: convert the identifier to upper camel case: `LinkedList`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `pointer` should have an upper camel case name
[INFO] [stdout]   --> src/m12_linked_list.rs:12:6
[INFO] [stdout]    |
[INFO] [stdout] 12 | type pointer = Option<Box<Node>>;
[INFO] [stdout]    |      ^^^^^^^ help: convert the identifier to upper camel case: `Pointer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Cons`, `Nil`
[INFO] [stdout]  --> src/m12_reference_counting_pointer.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | use List::{Cons, Nil};
[INFO] [stdout]   |            ^^^^  ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition: `mad_skills`
[INFO] [stdout]  --> src/m14_macros.rs:1:14
[INFO] [stdout]   |
[INFO] [stdout] 1 | macro_rules! mad_skills {
[INFO] [stdout]   |              ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition: `string_concat`
[INFO] [stdout]   --> src/m14_macros.rs:14:14
[INFO] [stdout]    |
[INFO] [stdout] 14 | macro_rules! string_concat {
[INFO] [stdout]    |              ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition: `input`
[INFO] [stdout]   --> src/m14_macros.rs:25:14
[INFO] [stdout]    |
[INFO] [stdout] 25 | macro_rules! input {
[INFO] [stdout]    |              ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition: `my_vec`
[INFO] [stdout]   --> src/m14_macros.rs:38:14
[INFO] [stdout]    |
[INFO] [stdout] 38 | macro_rules! my_vec {
[INFO] [stdout]    |              ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `HashMap`, `HashSet`
[INFO] [stdout]  --> src/m8_collections.rs:1:24
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::{HashMap, HashSet};
[INFO] [stdout]   |                        ^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `alice_check`
[INFO] [stdout]   --> src/m5_lifetimes.rs:19:13
[INFO] [stdout]    |
[INFO] [stdout] 19 |         let alice_check = largest(&check_ag, alice.points);
[INFO] [stdout]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_alice_check`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `travel_1`
[INFO] [stdout]   --> src/m9_mods.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let travel_1 = travel_history::Conveyance::Car;
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_travel_1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `travel_2`
[INFO] [stdout]   --> src/m9_mods.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let travel_2 = travel_history::Conveyance::Air;
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_travel_2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `area_rect1`
[INFO] [stdout]   --> src/main.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 99 |     let area_rect1 = math_funcs::rect_area(&rect1.length, &rect1.width);
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_area_rect1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:79:9
[INFO] [stdout]    |
[INFO] [stdout] 79 |     let mut f = min;
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:80:9
[INFO] [stdout]    |
[INFO] [stdout] 80 |     let mut m = max;
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List` is never used
[INFO] [stdout]  --> src/m10_smart_pointers.rs:2:6
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum List {
[INFO] [stdout]   |      ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List` is never used
[INFO] [stdout]   --> src/m11_custom_smart_pointers.rs:61:6
[INFO] [stdout]    |
[INFO] [stdout] 61 | enum List {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MySmartPointer` is never constructed
[INFO] [stdout]   --> src/m11_custom_smart_pointers.rs:65:8
[INFO] [stdout]    |
[INFO] [stdout] 65 | struct MySmartPointer<T: std::fmt::Debug> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/m11_custom_smart_pointers.rs:70:8
[INFO] [stdout]    |
[INFO] [stdout] 69 | impl<T: std::fmt::Debug> MySmartPointer<T> {
[INFO] [stdout]    | ------------------------------------------ associated function in this implementation
[INFO] [stdout] 70 |     fn new(x: T) -> MySmartPointer<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `my_fn` is never used
[INFO] [stdout]   --> src/m11_custom_smart_pointers.rs:88:4
[INFO] [stdout]    |
[INFO] [stdout] 88 | fn my_fn(str: &str) {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `linked_list` is never constructed
[INFO] [stdout]  --> src/m12_linked_list.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct linked_list {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/m12_linked_list.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Node {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `pointer` is never used
[INFO] [stdout]   --> src/m12_linked_list.rs:12:6
[INFO] [stdout]    |
[INFO] [stdout] 12 | type pointer = Option<Box<Node>>;
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `create_empty_list`, `add`, and `remove` are never used
[INFO] [stdout]   --> src/m12_linked_list.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl linked_list {
[INFO] [stdout]    | ---------------- associated items in this implementation
[INFO] [stdout] 15 |     fn create_empty_list() -> linked_list {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     fn add(&mut self, element: i32) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 41 |     fn remove(&mut self) -> Option<i32> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List` is never used
[INFO] [stdout]  --> src/m12_reference_counting_pointer.rs:3:6
[INFO] [stdout]   |
[INFO] [stdout] 3 | enum List {
[INFO] [stdout]   |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `List` is never constructed
[INFO] [stdout]  --> src/m13_double_linked_list.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct List<T> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/m13_double_linked_list.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Node<T> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Pointer` is never used
[INFO] [stdout]   --> src/m13_double_linked_list.rs:15:6
[INFO] [stdout]    |
[INFO] [stdout] 15 | type Pointer<T> = Option<Rc<RefCell<Node<T>>>>;
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/m13_double_linked_list.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl<T: std::fmt::Display> Node<T> {
[INFO] [stdout]    | ---------------------------------- associated function in this implementation
[INFO] [stdout] 18 |     fn new(element: T) -> Rc<RefCell<Node<T>>> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `push_front` are never used
[INFO] [stdout]   --> src/m13_double_linked_list.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl<T: std::fmt::Display> List<T> {
[INFO] [stdout]    | ---------------------------------- associated items in this implementation
[INFO] [stdout] 28 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     fn push_front(&mut self, element: T) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `CarColour` is never used
[INFO] [stdout]  --> src/m1_enums.rs:2:6
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum CarColour {
[INFO] [stdout]   |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `GivenResult` is never used
[INFO] [stdout]   --> src/m1_enums.rs:10:6
[INFO] [stdout]    |
[INFO] [stdout] 10 | enum GivenResult<T, E> {
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `GivenOptions` is never used
[INFO] [stdout]   --> src/m1_enums.rs:17:6
[INFO] [stdout]    |
[INFO] [stdout] 17 | enum GivenOptions<T> {
[INFO] [stdout]    |      ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Conveyance` is never used
[INFO] [stdout]   --> src/m1_enums.rs:24:6
[INFO] [stdout]    |
[INFO] [stdout] 24 | enum Conveyance {
[INFO] [stdout]    |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `travel_allowance` is never used
[INFO] [stdout]   --> src/m1_enums.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | impl Conveyance {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 31 |     fn travel_allowance(&self, miles: i32) -> f32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `check_under_five` is never used
[INFO] [stdout]   --> src/m1_enums.rs:42:4
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn check_under_five(num_check: u8) -> GivenResult<u8, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `check_under_five_built_in` is never used
[INFO] [stdout]   --> src/m1_enums.rs:50:4
[INFO] [stdout]    |
[INFO] [stdout] 50 | fn check_under_five_built_in(num_check: u8) -> Result<u8, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `remainder_zero` is never used
[INFO] [stdout]   --> src/m1_enums.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn remainder_zero(num_check: f32) -> GivenOptions<f32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `handle_car_colour_red` is never used
[INFO] [stdout]   --> src/m1_enums.rs:67:4
[INFO] [stdout]    |
[INFO] [stdout] 67 | fn handle_car_colour_red() -> CarColour {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]  --> src/m2_structs.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct User {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `square` is never used
[INFO] [stdout]  --> src/m2_structs.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn square<T>(num: T) -> T
[INFO] [stdout]   |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `increment_signin_count`, `change_email`, and `change_username` are never used
[INFO] [stdout]   --> src/m2_structs.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl User {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 17 |     fn increment_signin_count(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |     fn change_email(&mut self, new_email: &str) {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     fn change_username(user: &mut User, new_username: &str) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `change_username` is never used
[INFO] [stdout]   --> src/m2_structs.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn change_username(user: &mut User, new_username: &str) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Attacker` is never used
[INFO] [stdout]  --> src/m3_trait.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | trait Attacker {
[INFO] [stdout]   |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `BasicStats` is never used
[INFO] [stdout]  --> src/m3_trait.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | trait BasicStats {
[INFO] [stdout]   |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Character` is never used
[INFO] [stdout]   --> src/m3_trait.rs:11:6
[INFO] [stdout]    |
[INFO] [stdout] 11 | enum Character {
[INFO] [stdout]    |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Data` is never constructed
[INFO] [stdout]   --> src/m3_trait.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Data {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `EthereumAddress` is never used
[INFO] [stdout]  --> src/m4_polymorphism.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | trait EthereumAddress {
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_ethereum_data` is never used
[INFO] [stdout]   --> src/m4_polymorphism.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn get_ethereum_data<T: EthereumAddress>(address: T) -> Address {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_lifetime` is never used
[INFO] [stdout]  --> src/m5_lifetimes.rs:2:4
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn test_lifetime() {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `largest` is never used
[INFO] [stdout]   --> src/m5_lifetimes.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn largest<'a, T: PartialOrd>(compare_1: &'a T, compare_2: &'a T) -> &'a T {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]   --> src/m5_lifetimes.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | struct Person<'b> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Message` is never used
[INFO] [stdout]  --> src/m6_patterns.rs:2:6
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum Message {
[INFO] [stdout]   |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process_message` is never used
[INFO] [stdout]  --> src/m6_patterns.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn process_message(msg: Message) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `my_async_call` is never used
[INFO] [stdout]  --> src/m7_async.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | async fn my_async_call(url: &str) -> Result<serde_json::Value, Error> {
[INFO] [stdout]   |          ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `allowance` is never used
[INFO] [stdout]  --> src/m9_mods.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn allowance() {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Conveyance` is never used
[INFO] [stdout]  --> src/m9_mods.rs:2:14
[INFO] [stdout]   |
[INFO] [stdout] 2 |     pub enum Conveyance {
[INFO] [stdout]   |              ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 56 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2m 23s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: wasm-bindgen v0.2.87
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "fa60004b4c74b32526dade58e43173e319645a2ac48e54a6a563e22aa16ff1b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa60004b4c74b32526dade58e43173e319645a2ac48e54a6a563e22aa16ff1b7", kill_on_drop: false }`
[INFO] [stdout] fa60004b4c74b32526dade58e43173e319645a2ac48e54a6a563e22aa16ff1b7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a3d16319c62a9bd3f5a9aea3103154e3db0383c0c9b4242449ad59e386bf6b74
[INFO] running `Command { std: "docker" "start" "-a" "a3d16319c62a9bd3f5a9aea3103154e3db0383c0c9b4242449ad59e386bf6b74", kill_on_drop: false }`
[INFO] [stderr]    Compiling playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `List::Cons`
[INFO] [stdout]   --> src/m11_custom_smart_pointers.rs:95:9
[INFO] [stdout]    |
[INFO] [stdout] 95 |     use List::Cons;
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `linked_list` should have an upper camel case name
[INFO] [stdout]  --> src/m12_linked_list.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct linked_list {
[INFO] [stdout]   |        ^^^^^^^^^^^ help: convert the identifier to upper camel case: `LinkedList`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `pointer` should have an upper camel case name
[INFO] [stdout]   --> src/m12_linked_list.rs:12:6
[INFO] [stdout]    |
[INFO] [stdout] 12 | type pointer = Option<Box<Node>>;
[INFO] [stdout]    |      ^^^^^^^ help: convert the identifier to upper camel case: `Pointer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition: `input`
[INFO] [stdout]   --> src/m14_macros.rs:25:14
[INFO] [stdout]    |
[INFO] [stdout] 25 | macro_rules! input {
[INFO] [stdout]    |              ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/m14_macros.rs:20:38
[INFO] [stdout]    |
[INFO] [stdout] 20 |     $(temp_str.push_str($some_str);)*;
[INFO] [stdout]    |                                      ^ help: remove this semicolon
[INFO] [stdout] ...
[INFO] [stdout] 72 |         let str_null = string_concat!();
[INFO] [stdout]    |                        ---------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `string_concat` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/m14_macros.rs:20:38
[INFO] [stdout]    |
[INFO] [stdout] 20 |     $(temp_str.push_str($some_str);)*;
[INFO] [stdout]    |                                      ^ help: remove this semicolon
[INFO] [stdout] ...
[INFO] [stdout] 73 |         let str_single = string_concat!("First");
[INFO] [stdout]    |                          ----------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `string_concat` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/m14_macros.rs:20:38
[INFO] [stdout]    |
[INFO] [stdout] 20 |     $(temp_str.push_str($some_str);)*;
[INFO] [stdout]    |                                      ^ help: remove this semicolon
[INFO] [stdout] ...
[INFO] [stdout] 75 |         let str_multiple = string_concat!("Firts","Second");
[INFO] [stdout]    |                            -------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `string_concat` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ethers::types::Res`
[INFO] [stdout]   --> src/m7_async.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     use ethers::types::Res;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack_ref`
[INFO] [stdout]   --> src/m10_smart_pointers.rs:20:13
[INFO] [stdout]    |
[INFO] [stdout] 20 |         let stack_ref = &stack_var;
[INFO] [stdout]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_stack_ref`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `heap_var`
[INFO] [stdout]   --> src/m10_smart_pointers.rs:28:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |         let heap_var = Box::new(stack_var);
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_heap_var`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/m12_reference_counting_pointer.rs:20:13
[INFO] [stdout]    |
[INFO] [stdout] 20 |         let b = Rc::new(Cons(3, Rc::clone(&a)));
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/m12_reference_counting_pointer.rs:22:13
[INFO] [stdout]    |
[INFO] [stdout] 22 |         let c = Rc::new(Cons(4, Rc::clone(&a)));
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `list1`
[INFO] [stdout]   --> src/m13_double_linked_list.rs:59:17
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let mut list1: List<i32> = List::new();
[INFO] [stdout]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_list1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/m13_double_linked_list.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let mut list1: List<i32> = List::new();
[INFO] [stdout]    |             ----^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str_null`
[INFO] [stdout]   --> src/m14_macros.rs:72:13
[INFO] [stdout]    |
[INFO] [stdout] 72 |         let str_null = string_concat!();
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_str_null`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str_single`
[INFO] [stdout]   --> src/m14_macros.rs:73:13
[INFO] [stdout]    |
[INFO] [stdout] 73 |         let str_single = string_concat!("First");
[INFO] [stdout]    |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_str_single`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str_multiple`
[INFO] [stdout]   --> src/m14_macros.rs:75:13
[INFO] [stdout]    |
[INFO] [stdout] 75 |         let str_multiple = string_concat!("Firts","Second");
[INFO] [stdout]    |             ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_str_multiple`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `some_var`
[INFO] [stdout]   --> src/m14_macros.rs:77:13
[INFO] [stdout]    |
[INFO] [stdout] 77 |         let some_var = mad_skills!(i32);
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_var`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/m14_macros.rs:78:17
[INFO] [stdout]    |
[INFO] [stdout] 78 |         let mut x: Vec<i32>  = vec!();
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/m14_macros.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 |         let mut temp_str = String::new();
[INFO] [stdout]    |             ----^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 72 |         let str_null = string_concat!();
[INFO] [stdout]    |                        ---------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `string_concat` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/m14_macros.rs:78:13
[INFO] [stdout]    |
[INFO] [stdout] 78 |         let mut x: Vec<i32>  = vec!();
[INFO] [stdout]    |             ----^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/m14_macros.rs:79:13
[INFO] [stdout]    |
[INFO] [stdout] 79 |         let mut y = my_vec!(1,2,3,4);
[INFO] [stdout]    |             ----^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `addr`
[INFO] [stdout]   --> src/m4_polymorphism.rs:35:13
[INFO] [stdout]    |
[INFO] [stdout] 35 |         let addr: Address =
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_addr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `alice_check`
[INFO] [stdout]   --> src/m5_lifetimes.rs:19:13
[INFO] [stdout]    |
[INFO] [stdout] 19 |         let alice_check = largest(&check_ag, alice.points);
[INFO] [stdout]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_alice_check`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `prob_none`
[INFO] [stdout]   --> src/m6_patterns.rs:46:13
[INFO] [stdout]    |
[INFO] [stdout] 46 |         let prob_none: Option<i32> = None;
[INFO] [stdout]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_prob_none`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `person1`
[INFO] [stdout]   --> src/m8_collections.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |         let person1 = "alice";
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_person1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `person2`
[INFO] [stdout]   --> src/m8_collections.rs:13:13
[INFO] [stdout]    |
[INFO] [stdout] 13 |         let person2 = "bob";
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_person2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `travel_1`
[INFO] [stdout]   --> src/m9_mods.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let travel_1 = travel_history::Conveyance::Car;
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_travel_1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `travel_2`
[INFO] [stdout]   --> src/m9_mods.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let travel_2 = travel_history::Conveyance::Air;
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_travel_2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `area_rect1`
[INFO] [stdout]   --> src/main.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 99 |     let area_rect1 = math_funcs::rect_area(&rect1.length, &rect1.width);
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_area_rect1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:79:9
[INFO] [stdout]    |
[INFO] [stdout] 79 |     let mut f = min;
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:80:9
[INFO] [stdout]    |
[INFO] [stdout] 80 |     let mut m = max;
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> src/m10_smart_pointers.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 |     Cons(i32, Box<List>),
[INFO] [stdout]   |     ---- ^^^  ^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     fields in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]   |
[INFO] [stdout] 3 |     Cons((), ()),
[INFO] [stdout]   |          ~~  ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List` is never used
[INFO] [stdout]   --> src/m11_custom_smart_pointers.rs:61:6
[INFO] [stdout]    |
[INFO] [stdout] 61 | enum List {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> src/m12_reference_counting_pointer.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 |     Cons(i32, Rc<List>),
[INFO] [stdout]   |     ---- ^^^  ^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     fields in this variant
[INFO] [stdout]   |
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]   |
[INFO] [stdout] 4 |     Cons((), ()),
[INFO] [stdout]   |          ~~  ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `head` and `tail` are never read
[INFO] [stdout]  --> src/m13_double_linked_list.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct List<T> {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] 5 |     head: Pointer<T>,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 6 |     tail: Pointer<T>,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `element`, `next`, and `prev` are never read
[INFO] [stdout]   --> src/m13_double_linked_list.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 9  | struct Node<T> {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 10 |     element: T,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 11 |     next: Pointer<T>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 12 |     prev: Pointer<T>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/m13_double_linked_list.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl<T: std::fmt::Display> Node<T> {
[INFO] [stdout]    | ---------------------------------- associated function in this implementation
[INFO] [stdout] 18 |     fn new(element: T) -> Rc<RefCell<Node<T>>> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `push_front` is never used
[INFO] [stdout]   --> src/m13_double_linked_list.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl<T: std::fmt::Display> List<T> {
[INFO] [stdout]    | ---------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 35 |     fn push_front(&mut self, element: T) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Green`, `Blue`, and `Silver` are never constructed
[INFO] [stdout]  --> src/m1_enums.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum CarColour {
[INFO] [stdout]   |      --------- variants in this enum
[INFO] [stdout] 3 |     Red,
[INFO] [stdout] 4 |     Green,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 5 |     Blue,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 6 |     Silver,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `CarColour` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Train` and `Air` are never constructed
[INFO] [stdout]   --> src/m1_enums.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | enum Conveyance {
[INFO] [stdout]    |      ---------- variants in this enum
[INFO] [stdout] 25 |     Car = 15,
[INFO] [stdout] 26 |     Train = 20,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 27 |     Air = 30,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Conveyance` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `email` and `active` are never read
[INFO] [stdout]  --> src/m2_structs.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct User {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] 3 |     username: String,
[INFO] [stdout] 4 |     email: String,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 5 |     sign_in_count: u64,
[INFO] [stdout] 6 |     active: bool,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `User` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `change_email` and `change_username` are never used
[INFO] [stdout]   --> src/m2_structs.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl User {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 21 |     fn change_email(&mut self, new_email: &str) {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     fn change_username(user: &mut User, new_username: &str) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `BasicStats` is never used
[INFO] [stdout]  --> src/m3_trait.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | trait BasicStats {
[INFO] [stdout]   |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Warrior` and `Wizard` are never constructed
[INFO] [stdout]   --> src/m3_trait.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | enum Character {
[INFO] [stdout]    |      --------- variants in this enum
[INFO] [stdout] 12 |     Warrior,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 13 |     Archer,
[INFO] [stdout] 14 |     Wizard,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Character` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Data` is never constructed
[INFO] [stdout]   --> src/m3_trait.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Data {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_lifetime` is never used
[INFO] [stdout]  --> src/m5_lifetimes.rs:2:4
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn test_lifetime() {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `largest` is never used
[INFO] [stdout]   --> src/m5_lifetimes.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn largest<'a, T: PartialOrd>(compare_1: &'a T, compare_2: &'a T) -> &'a T {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]   --> src/m5_lifetimes.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | struct Person<'b> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `allowance` is never used
[INFO] [stdout]  --> src/m9_mods.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn allowance() {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Conveyance` is never used
[INFO] [stdout]  --> src/m9_mods.rs:2:14
[INFO] [stdout]   |
[INFO] [stdout] 2 |     pub enum Conveyance {
[INFO] [stdout]   |              ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/m1_enums.rs:94:9
[INFO] [stdout]    |
[INFO] [stdout] 94 |         dbg!(is_under_five_res_buil_in);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 52 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 9.32s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: wasm-bindgen v0.2.87
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "a3d16319c62a9bd3f5a9aea3103154e3db0383c0c9b4242449ad59e386bf6b74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3d16319c62a9bd3f5a9aea3103154e3db0383c0c9b4242449ad59e386bf6b74", kill_on_drop: false }`
[INFO] [stdout] a3d16319c62a9bd3f5a9aea3103154e3db0383c0c9b4242449ad59e386bf6b74
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 66ffb22bbdce6463850e11ed467e9f61f62c387dd99acbe722fc2ed39f0f22ef
[INFO] running `Command { std: "docker" "start" "-a" "66ffb22bbdce6463850e11ed467e9f61f62c387dd99acbe722fc2ed39f0f22ef", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `List::Cons`
[INFO] [stderr]   --> src/m11_custom_smart_pointers.rs:95:9
[INFO] [stderr]    |
[INFO] [stderr] 95 |     use List::Cons;
[INFO] [stderr]    |         ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `linked_list` should have an upper camel case name
[INFO] [stderr]  --> src/m12_linked_list.rs:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 | struct linked_list {
[INFO] [stderr]   |        ^^^^^^^^^^^ help: convert the identifier to upper camel case: `LinkedList`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `pointer` should have an upper camel case name
[INFO] [stderr]   --> src/m12_linked_list.rs:12:6
[INFO] [stderr]    |
[INFO] [stderr] 12 | type pointer = Option<Box<Node>>;
[INFO] [stderr]    |      ^^^^^^^ help: convert the identifier to upper camel case: `Pointer`
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition: `input`
[INFO] [stderr]   --> src/m14_macros.rs:25:14
[INFO] [stderr]    |
[INFO] [stderr] 25 | macro_rules! input {
[INFO] [stderr]    |              ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_macros)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]   --> src/m14_macros.rs:20:38
[INFO] [stderr]    |
[INFO] [stderr] 20 |     $(temp_str.push_str($some_str);)*;
[INFO] [stderr]    |                                      ^ help: remove this semicolon
[INFO] [stderr] ...
[INFO] [stderr] 72 |         let str_null = string_concat!();
[INFO] [stderr]    |                        ---------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stderr]    = note: this warning originates in the macro `string_concat` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]   --> src/m14_macros.rs:20:38
[INFO] [stderr]    |
[INFO] [stderr] 20 |     $(temp_str.push_str($some_str);)*;
[INFO] [stderr]    |                                      ^ help: remove this semicolon
[INFO] [stderr] ...
[INFO] [stderr] 73 |         let str_single = string_concat!("First");
[INFO] [stderr]    |                          ----------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `string_concat` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]   --> src/m14_macros.rs:20:38
[INFO] [stderr]    |
[INFO] [stderr] 20 |     $(temp_str.push_str($some_str);)*;
[INFO] [stderr]    |                                      ^ help: remove this semicolon
[INFO] [stderr] ...
[INFO] [stderr] 75 |         let str_multiple = string_concat!("Firts","Second");
[INFO] [stderr]    |                            -------------------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `string_concat` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ethers::types::Res`
[INFO] [stderr]   --> src/m7_async.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |     use ethers::types::Res;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `stack_ref`
[INFO] [stderr]   --> src/m10_smart_pointers.rs:20:13
[INFO] [stderr]    |
[INFO] [stderr] 20 |         let stack_ref = &stack_var;
[INFO] [stderr]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_stack_ref`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `heap_var`
[INFO] [stderr]   --> src/m10_smart_pointers.rs:28:13
[INFO] [stderr]    |
[INFO] [stderr] 28 |         let heap_var = Box::new(stack_var);
[INFO] [stderr]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_heap_var`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/m12_reference_counting_pointer.rs:20:13
[INFO] [stderr]    |
[INFO] [stderr] 20 |         let b = Rc::new(Cons(3, Rc::clone(&a)));
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]   --> src/m12_reference_counting_pointer.rs:22:13
[INFO] [stderr]    |
[INFO] [stderr] 22 |         let c = Rc::new(Cons(4, Rc::clone(&a)));
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `list1`
[INFO] [stderr]   --> src/m13_double_linked_list.rs:59:17
[INFO] [stderr]    |
[INFO] [stderr] 59 |         let mut list1: List<i32> = List::new();
[INFO] [stderr]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_list1`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/m13_double_linked_list.rs:59:13
[INFO] [stderr]    |
[INFO] [stderr] 59 |         let mut list1: List<i32> = List::new();
[INFO] [stderr]    |             ----^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `str_null`
[INFO] [stderr]   --> src/m14_macros.rs:72:13
[INFO] [stderr]    |
[INFO] [stderr] 72 |         let str_null = string_concat!();
[INFO] [stderr]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_str_null`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `str_single`
[INFO] [stderr]   --> src/m14_macros.rs:73:13
[INFO] [stderr]    |
[INFO] [stderr] 73 |         let str_single = string_concat!("First");
[INFO] [stderr]    |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_str_single`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `str_multiple`
[INFO] [stderr]   --> src/m14_macros.rs:75:13
[INFO] [stderr]    |
[INFO] [stderr] 75 |         let str_multiple = string_concat!("Firts","Second");
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_str_multiple`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `some_var`
[INFO] [stderr]   --> src/m14_macros.rs:77:13
[INFO] [stderr]    |
[INFO] [stderr] 77 |         let some_var = mad_skills!(i32);
[INFO] [stderr]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_var`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/m14_macros.rs:78:17
[INFO] [stderr]    |
[INFO] [stderr] 78 |         let mut x: Vec<i32>  = vec!();
[INFO] [stderr]    |                 ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/m14_macros.rs:18:13
[INFO] [stderr]    |
[INFO] [stderr] 18 |         let mut temp_str = String::new();
[INFO] [stderr]    |             ----^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] ...
[INFO] [stderr] 72 |         let str_null = string_concat!();
[INFO] [stderr]    |                        ---------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `string_concat` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/m14_macros.rs:78:13
[INFO] [stderr]    |
[INFO] [stderr] 78 |         let mut x: Vec<i32>  = vec!();
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/m14_macros.rs:79:13
[INFO] [stderr]    |
[INFO] [stderr] 79 |         let mut y = my_vec!(1,2,3,4);
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `addr`
[INFO] [stderr]   --> src/m4_polymorphism.rs:35:13
[INFO] [stderr]    |
[INFO] [stderr] 35 |         let addr: Address =
[INFO] [stderr]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_addr`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `alice_check`
[INFO] [stderr]   --> src/m5_lifetimes.rs:19:13
[INFO] [stderr]    |
[INFO] [stderr] 19 |         let alice_check = largest(&check_ag, alice.points);
[INFO] [stderr]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_alice_check`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `prob_none`
[INFO] [stderr]   --> src/m6_patterns.rs:46:13
[INFO] [stderr]    |
[INFO] [stderr] 46 |         let prob_none: Option<i32> = None;
[INFO] [stderr]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_prob_none`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `person1`
[INFO] [stderr]   --> src/m8_collections.rs:12:13
[INFO] [stderr]    |
[INFO] [stderr] 12 |         let person1 = "alice";
[INFO] [stderr]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_person1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `person2`
[INFO] [stderr]   --> src/m8_collections.rs:13:13
[INFO] [stderr]    |
[INFO] [stderr] 13 |         let person2 = "bob";
[INFO] [stderr]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_person2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `travel_1`
[INFO] [stderr]   --> src/m9_mods.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let travel_1 = travel_history::Conveyance::Car;
[INFO] [stderr]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_travel_1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `travel_2`
[INFO] [stderr]   --> src/m9_mods.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let travel_2 = travel_history::Conveyance::Air;
[INFO] [stderr]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_travel_2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `area_rect1`
[INFO] [stderr]   --> src/main.rs:99:9
[INFO] [stderr]    |
[INFO] [stderr] 99 |     let area_rect1 = math_funcs::rect_area(&rect1.length, &rect1.width);
[INFO] [stderr]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_area_rect1`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:79:9
[INFO] [stderr]    |
[INFO] [stderr] 79 |     let mut f = min;
[INFO] [stderr]    |         ----^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:80:9
[INFO] [stderr]    |
[INFO] [stderr] 80 |     let mut m = max;
[INFO] [stderr]    |         ----^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: fields `0` and `1` are never read
[INFO] [stderr]  --> src/m10_smart_pointers.rs:3:10
[INFO] [stderr]   |
[INFO] [stderr] 3 |     Cons(i32, Box<List>),
[INFO] [stderr]   |     ---- ^^^  ^^^^^^^^^
[INFO] [stderr]   |     |
[INFO] [stderr]   |     fields in this variant
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stderr]   |
[INFO] [stderr] 3 |     Cons((), ()),
[INFO] [stderr]   |          ~~  ~~
[INFO] [stderr] 
[INFO] [stderr] warning: enum `List` is never used
[INFO] [stderr]   --> src/m11_custom_smart_pointers.rs:61:6
[INFO] [stderr]    |
[INFO] [stderr] 61 | enum List {
[INFO] [stderr]    |      ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: fields `0` and `1` are never read
[INFO] [stderr]  --> src/m12_reference_counting_pointer.rs:4:10
[INFO] [stderr]   |
[INFO] [stderr] 4 |     Cons(i32, Rc<List>),
[INFO] [stderr]   |     ---- ^^^  ^^^^^^^^
[INFO] [stderr]   |     |
[INFO] [stderr]   |     fields in this variant
[INFO] [stderr]   |
[INFO] [stderr] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stderr]   |
[INFO] [stderr] 4 |     Cons((), ()),
[INFO] [stderr]   |          ~~  ~~
[INFO] [stderr] 
[INFO] [stderr] warning: fields `head` and `tail` are never read
[INFO] [stderr]  --> src/m13_double_linked_list.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | struct List<T> {
[INFO] [stderr]   |        ---- fields in this struct
[INFO] [stderr] 5 |     head: Pointer<T>,
[INFO] [stderr]   |     ^^^^
[INFO] [stderr] 6 |     tail: Pointer<T>,
[INFO] [stderr]   |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: fields `element`, `next`, and `prev` are never read
[INFO] [stderr]   --> src/m13_double_linked_list.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 9  | struct Node<T> {
[INFO] [stderr]    |        ---- fields in this struct
[INFO] [stderr] 10 |     element: T,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 11 |     next: Pointer<T>,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 12 |     prev: Pointer<T>,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/m13_double_linked_list.rs:18:8
[INFO] [stderr]    |
[INFO] [stderr] 17 | impl<T: std::fmt::Display> Node<T> {
[INFO] [stderr]    | ---------------------------------- associated function in this implementation
[INFO] [stderr] 18 |     fn new(element: T) -> Rc<RefCell<Node<T>>> {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `push_front` is never used
[INFO] [stderr]   --> src/m13_double_linked_list.rs:35:8
[INFO] [stderr]    |
[INFO] [stderr] 27 | impl<T: std::fmt::Display> List<T> {
[INFO] [stderr]    | ---------------------------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 35 |     fn push_front(&mut self, element: T) {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Green`, `Blue`, and `Silver` are never constructed
[INFO] [stderr]  --> src/m1_enums.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | enum CarColour {
[INFO] [stderr]   |      --------- variants in this enum
[INFO] [stderr] 3 |     Red,
[INFO] [stderr] 4 |     Green,
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr] 5 |     Blue,
[INFO] [stderr]   |     ^^^^
[INFO] [stderr] 6 |     Silver,
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `CarColour` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Train` and `Air` are never constructed
[INFO] [stderr]   --> src/m1_enums.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 24 | enum Conveyance {
[INFO] [stderr]    |      ---------- variants in this enum
[INFO] [stderr] 25 |     Car = 15,
[INFO] [stderr] 26 |     Train = 20,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 27 |     Air = 30,
[INFO] [stderr]    |     ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Conveyance` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: fields `email` and `active` are never read
[INFO] [stderr]  --> src/m2_structs.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | struct User {
[INFO] [stderr]   |        ---- fields in this struct
[INFO] [stderr] 3 |     username: String,
[INFO] [stderr] 4 |     email: String,
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr] 5 |     sign_in_count: u64,
[INFO] [stderr] 6 |     active: bool,
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `User` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `change_email` and `change_username` are never used
[INFO] [stderr]   --> src/m2_structs.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 16 | impl User {
[INFO] [stderr]    | --------- associated items in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 21 |     fn change_email(&mut self, new_email: &str) {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 25 |     fn change_username(user: &mut User, new_username: &str) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `BasicStats` is never used
[INFO] [stderr]  --> src/m3_trait.rs:5:7
[INFO] [stderr]   |
[INFO] [stderr] 5 | trait BasicStats {
[INFO] [stderr]   |       ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Warrior` and `Wizard` are never constructed
[INFO] [stderr]   --> src/m3_trait.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | enum Character {
[INFO] [stderr]    |      --------- variants in this enum
[INFO] [stderr] 12 |     Warrior,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 13 |     Archer,
[INFO] [stderr] 14 |     Wizard,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Character` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Data` is never constructed
[INFO] [stderr]   --> src/m3_trait.rs:19:8
[INFO] [stderr]    |
[INFO] [stderr] 19 | struct Data {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_lifetime` is never used
[INFO] [stderr]  --> src/m5_lifetimes.rs:2:4
[INFO] [stderr]   |
[INFO] [stderr] 2 | fn test_lifetime() {
[INFO] [stderr]   |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `largest` is never used
[INFO] [stderr]   --> src/m5_lifetimes.rs:26:4
[INFO] [stderr]    |
[INFO] [stderr] 26 | fn largest<'a, T: PartialOrd>(compare_1: &'a T, compare_2: &'a T) -> &'a T {
[INFO] [stderr]    |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Person` is never constructed
[INFO] [stderr]   --> src/m5_lifetimes.rs:34:8
[INFO] [stderr]    |
[INFO] [stderr] 34 | struct Person<'b> {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `allowance` is never used
[INFO] [stderr]  --> src/m9_mods.rs:9:8
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub fn allowance() {
[INFO] [stderr]   |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `Conveyance` is never used
[INFO] [stderr]  --> src/m9_mods.rs:2:14
[INFO] [stderr]   |
[INFO] [stderr] 2 |     pub enum Conveyance {
[INFO] [stderr]   |              ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/m1_enums.rs:94:9
[INFO] [stderr]    |
[INFO] [stderr] 94 |         dbg!(is_under_five_res_buil_in);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this warning originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `playground` (bin "playground" test) generated 52 warnings (run `cargo fix --bin "playground" --tests` to apply 8 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.30s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: wasm-bindgen v0.2.87
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/playground-9fcacd252cd6ca63)
[INFO] [stdout] 
[INFO] [stdout] running 16 tests
[INFO] [stdout] test m10_smart_pointers::test::test_smart_pointer ... ok
[INFO] [stdout] test m12_linked_list::test::test_linked_list ... ok
[INFO] [stdout] test m12_reference_counting_pointer::test::test_rc_pointer ... ok
[INFO] [stdout] test m13_double_linked_list::test::test_dbl_list ... ok
[INFO] [stdout] test m14_macros::test::test_macro ... ok
[INFO] [stdout] test m2_structs::test::tests_struct ... ok
[INFO] [stdout] test m4_polymorphism::test::test_poly ... ok
[INFO] [stdout] test m6_patterns::test::test_match_literals ... ok
[INFO] [stdout] test m3_trait::test::test_traits ... ok
[INFO] [stdout] test m11_custom_smart_pointers::test::test_custom_smart_pointer_2 ... ok
[INFO] [stdout] test m6_patterns::test::test_large_enum ... ok
[INFO] [stdout] test m8_collections::test::tests_hashset ... ok
[INFO] [stdout] test m1_enums::test::test_enums ... ok
[INFO] [stdout] test m8_collections::test::tests_hashmap ... ok
[INFO] [stdout] test m6_patterns::test::test_match_option ... ok
[INFO] [stdout] test m7_async::tests::test_calls_async_fn ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- m7_async::tests::test_calls_async_fn stdout ----
[INFO] [stdout] thread 'm7_async::tests::test_calls_async_fn' panicked at src/m7_async.rs:34:17:
[INFO] [stdout] failed to make api request
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x556985e91765 - std::backtrace_rs::backtrace::libunwind::trace::h59d96bdb08384354
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
[INFO] [stdout]    1:     0x556985e91765 - std::backtrace_rs::backtrace::trace_unsynchronized::h9cf5becacfc93fba
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x556985e91765 - std::sys_common::backtrace::_print_fmt::h10b76d10405dbd48
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stdout]    3:     0x556985e91765 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h6ed9e62a156d84e4
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x556985ebc3bb - core::fmt::rt::Argument::fmt::h645c680983f03c9f
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/fmt/rt.rs:165:63
[INFO] [stdout]    5:     0x556985ebc3bb - core::fmt::write::h8bcd80919a02be29
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/fmt/mod.rs:1169:21
[INFO] [stdout]    6:     0x556985e8e43f - std::io::Write::write_fmt::h8d0c47c662cad79c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/io/mod.rs:1835:15
[INFO] [stdout]    7:     0x556985e9153e - std::sys_common::backtrace::_print::h6306f131a28d62b0
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    8:     0x556985e9153e - std::sys_common::backtrace::print::h7079288e0a26dfcc
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    9:     0x556985e92f69 - std::panicking::default_hook::{{closure}}::hb063ecec81a736ba
[INFO] [stdout]   10:     0x556985e92c2e - std::panicking::default_hook::hd56ee406bf547b5c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:295:9
[INFO] [stdout]   11:     0x556985893b6a - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::he5eacdef44c8728f
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2036:9
[INFO] [stdout]   12:     0x556985893b6a - test::test_main::{{closure}}::h0ec9aed229e79095
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:137:21
[INFO] [stdout]   13:     0x556985e9356b - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hcbd0d80e1ad4e4f9
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2036:9
[INFO] [stdout]   14:     0x556985e9356b - std::panicking::rust_panic_with_hook::h624aa3ca42ebb8f2
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:799:13
[INFO] [stdout]   15:     0x556985e932ab - std::panicking::begin_panic_handler::{{closure}}::hbc4e76194a5e287c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:656:13
[INFO] [stdout]   16:     0x556985e91c29 - std::sys_common::backtrace::__rust_end_short_backtrace::h847fedc9d1ff7b6d
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:171:18
[INFO] [stdout]   17:     0x556985e93017 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:652:5
[INFO] [stdout]   18:     0x55698584d0e3 - core::panicking::panic_fmt::hec11a924b87ce965
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/panicking.rs:72:14
[INFO] [stdout]   19:     0x556985855806 - playground::m7_async::tests::test_calls_async_fn::{{closure}}::hc0078f95c28a74fd
[INFO] [stdout]                                at /opt/rustwide/workdir/src/m7_async.rs:34:17
[INFO] [stdout]   20:     0x5569858517c2 - <core::pin::Pin<P> as core::future::future::Future>::poll::hac886fb2c736dc24
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/future/future.rs:123:9
[INFO] [stdout]   21:     0x55698585177d - <core::pin::Pin<P> as core::future::future::Future>::poll::h222e59bd31d76099
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/future/future.rs:123:9
[INFO] [stdout]   22:     0x55698585a37f - tokio::runtime::scheduler::current_thread::CoreGuard::block_on::{{closure}}::{{closure}}::{{closure}}::h28af30822d409f57
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/scheduler/current_thread/mod.rs:665:57
[INFO] [stdout]   23:     0x55698585a2b5 - tokio::runtime::coop::with_budget::hb46ae867da3256f1
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/coop.rs:107:5
[INFO] [stdout]   24:     0x55698585a2b5 - tokio::runtime::coop::budget::hf6360ca5d5b33c7c
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/coop.rs:73:5
[INFO] [stdout]   25:     0x55698585a2b5 - tokio::runtime::scheduler::current_thread::CoreGuard::block_on::{{closure}}::{{closure}}::h74f61c004469c94a
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/scheduler/current_thread/mod.rs:665:25
[INFO] [stdout]   26:     0x556985858d70 - tokio::runtime::scheduler::current_thread::Context::enter::h322bd5cc7a9c51ee
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/scheduler/current_thread/mod.rs:410:19
[INFO] [stdout]   27:     0x556985859b1e - tokio::runtime::scheduler::current_thread::CoreGuard::block_on::{{closure}}::h90deaa57673215b2
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/scheduler/current_thread/mod.rs:664:36
[INFO] [stdout]   28:     0x556985859894 - tokio::runtime::scheduler::current_thread::CoreGuard::enter::{{closure}}::hd0089037bc0cfe5b
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/scheduler/current_thread/mod.rs:743:68
[INFO] [stdout]   29:     0x556985857dcb - tokio::runtime::context::scoped::Scoped<T>::set::hc10aadaea9574571
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/context/scoped.rs:40:9
[INFO] [stdout]   30:     0x556985850c69 - tokio::runtime::context::set_scheduler::{{closure}}::h5d1636f8d36eed9f
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/context.rs:176:26
[INFO] [stdout]   31:     0x55698584e0c0 - std::thread::local::LocalKey<T>::try_with::h0dc13a07d28331c6
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/thread/local.rs:286:12
[INFO] [stdout]   32:     0x55698584dfba - std::thread::local::LocalKey<T>::with::had095409c7bedc75
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/thread/local.rs:262:9
[INFO] [stdout]   33:     0x556985850c1d - tokio::runtime::context::set_scheduler::h4fed85f64c39f218
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/context.rs:176:9
[INFO] [stdout]   34:     0x556985859640 - tokio::runtime::scheduler::current_thread::CoreGuard::enter::h527157ae5f734f66
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/scheduler/current_thread/mod.rs:743:27
[INFO] [stdout]   35:     0x5569858598b3 - tokio::runtime::scheduler::current_thread::CoreGuard::block_on::hb272415ac5219257
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/scheduler/current_thread/mod.rs:652:19
[INFO] [stdout]   36:     0x5569858588ad - tokio::runtime::scheduler::current_thread::CurrentThread::block_on::{{closure}}::hb6feba188a1bd98e
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/scheduler/current_thread/mod.rs:175:28
[INFO] [stdout]   37:     0x556985857f46 - tokio::runtime::context::runtime::enter_runtime::hf98ab0906fb9fd12
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/context/runtime.rs:65:16
[INFO] [stdout]   38:     0x5569858587c1 - tokio::runtime::scheduler::current_thread::CurrentThread::block_on::h2ad009f3256e6dc0
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/scheduler/current_thread/mod.rs:167:9
[INFO] [stdout]   39:     0x55698585861d - tokio::runtime::runtime::Runtime::block_on::hede6a9cdcf6954ca
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/runtime.rs:347:47
[INFO] [stdout]   40:     0x556985855221 - playground::m7_async::tests::test_calls_async_fn::hc6dec6e32a1b5a8e
[INFO] [stdout]                                at /opt/rustwide/workdir/src/m7_async.rs:29:9
[INFO] [stdout]   41:     0x5569858550c7 - playground::m7_async::tests::test_calls_async_fn::{{closure}}::h6f53418ed2a6872c
[INFO] [stdout]                                at /opt/rustwide/workdir/src/m7_async.rs:24:35
[INFO] [stdout]   42:     0x5569858564a6 - core::ops::function::FnOnce::call_once::h979eaab6afb6639b
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   43:     0x55698589854b - core::ops::function::FnOnce::call_once::h2e43a8f6f3d94b99
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   44:     0x55698589854b - test::__rust_begin_short_backtrace::h214c9f2d2d3fee90
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:625:18
[INFO] [stdout]   45:     0x556985897c51 - test::run_test_in_process::{{closure}}::h510b7ba7990692a5
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:648:60
[INFO] [stdout]   46:     0x556985897c51 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h4157186197a93871
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   47:     0x556985897c51 - std::panicking::try::do_call::h1bf2463bccd4b28c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:559:40
[INFO] [stdout]   48:     0x556985897c51 - std::panicking::try::hd6d4808c9fab4fa5
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:523:19
[INFO] [stdout]   49:     0x556985897c51 - std::panic::catch_unwind::hd5641d97d123f9f2
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panic.rs:149:14
[INFO] [stdout]   50:     0x556985897c51 - test::run_test_in_process::hc273b71c8b878a4c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:648:27
[INFO] [stdout]   51:     0x556985897c51 - test::run_test::{{closure}}::h6838df834eb8467e
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:569:43
[INFO] [stdout]   52:     0x556985860614 - test::run_test::{{closure}}::h608b98ecff5665fb
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:599:41
[INFO] [stdout]   53:     0x556985860614 - std::sys_common::backtrace::__rust_begin_short_backtrace::hdc4182b97d1042e9
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:155:18
[INFO] [stdout]   54:     0x556985865042 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h571773fd21d674c8
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/thread/mod.rs:542:17
[INFO] [stdout]   55:     0x556985865042 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hdcd384cf2fa70ba3
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   56:     0x556985865042 - std::panicking::try::do_call::h4f1a44bd81423be1
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:559:40
[INFO] [stdout]   57:     0x556985865042 - std::panicking::try::h5e02afcb81dcd361
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:523:19
[INFO] [stdout]   58:     0x556985865042 - std::panic::catch_unwind::h022f75775bfd8c45
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panic.rs:149:14
[INFO] [stdout]   59:     0x556985865042 - std::thread::Builder::spawn_unchecked_::{{closure}}::hf5a62e9e4e6df1f8
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/thread/mod.rs:541:30
[INFO] [stdout]   60:     0x556985865042 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h6d56360aeb9509a7
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   61:     0x556985e97b6b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h7a343dc551c06baa
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2022:9
[INFO] [stdout]   62:     0x556985e97b6b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h30b8111cbaa644f3
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2022:9
[INFO] [stdout]   63:     0x556985e97b6b - std::sys::pal::unix::thread::Thread::new::thread_start::h7404e134e61e7a11
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys/pal/unix/thread.rs:108:17
[INFO] [stdout]   64:     0x7f71b7712ac3 - <unknown>
[INFO] [stdout]   65:     0x7f71b77a3a04 - __clone
[INFO] [stdout]   66:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     m7_async::tests::test_calls_async_fn
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 15 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.15s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin playground`
[INFO] running `Command { std: "docker" "inspect" "66ffb22bbdce6463850e11ed467e9f61f62c387dd99acbe722fc2ed39f0f22ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66ffb22bbdce6463850e11ed467e9f61f62c387dd99acbe722fc2ed39f0f22ef", kill_on_drop: false }`
[INFO] [stdout] 66ffb22bbdce6463850e11ed467e9f61f62c387dd99acbe722fc2ed39f0f22ef
[INFO] testing Legend101Zz/rust-bot against try#b642703cf9526da1e72c0b6755753b939a9c6b6d for pr-125151
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLegend101Zz%2Frust-bot" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Legend101Zz/rust-bot on toolchain b642703cf9526da1e72c0b6755753b939a9c6b6d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Legend101Zz/rust-bot
[INFO] finished tweaking git repo https://github.com/Legend101Zz/rust-bot
[INFO] tweaked toml for git repo https://github.com/Legend101Zz/rust-bot written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Legend101Zz/rust-bot already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 99322d73d698b318b9b23524d607f949025adedc6b62425f768d7bcd11adc04e
[INFO] running `Command { std: "docker" "start" "-a" "99322d73d698b318b9b23524d607f949025adedc6b62425f768d7bcd11adc04e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "99322d73d698b318b9b23524d607f949025adedc6b62425f768d7bcd11adc04e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99322d73d698b318b9b23524d607f949025adedc6b62425f768d7bcd11adc04e", kill_on_drop: false }`
[INFO] [stdout] 99322d73d698b318b9b23524d607f949025adedc6b62425f768d7bcd11adc04e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c1cd227ebec4ec5504c29e5fffa52e9d4eace80d8052e0f7ffd25bec20b7221e
[INFO] running `Command { std: "docker" "start" "-a" "c1cd227ebec4ec5504c29e5fffa52e9d4eace80d8052e0f7ffd25bec20b7221e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.68
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling once_cell v1.18.0
[INFO] [stderr]    Compiling typenum v1.17.0
[INFO] [stderr]    Compiling libc v0.2.148
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling subtle v2.5.0
[INFO] [stderr]    Compiling const-oid v0.9.5
[INFO] [stderr]    Compiling zeroize v1.6.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling hashbrown v0.14.1
[INFO] [stderr]    Compiling equivalent v1.0.1
[INFO] [stderr]    Compiling winnow v0.5.16
[INFO] [stderr]    Compiling cpufeatures v0.2.9
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling rustc-hex v2.1.0
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling indexmap v2.0.2
[INFO] [stderr]    Compiling static_assertions v1.1.0
[INFO] [stderr]    Compiling thiserror v1.0.49
[INFO] [stderr]    Compiling syn v2.0.38
[INFO] [stderr]    Compiling getrandom v0.2.10
[INFO] [stderr]    Compiling arrayvec v0.7.4
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[INFO] [stdout] warning: type `linked_list` should have an upper camel case name
[INFO] [stdout]  --> src/m12_linked_list.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct linked_list {
[INFO] [stdout]   |        ^^^^^^^^^^^ help: convert the identifier to upper camel case: `LinkedList`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `pointer` should have an upper camel case name
[INFO] [stdout]   --> src/m12_linked_list.rs:12:6
[INFO] [stdout]    |
[INFO] [stdout] 12 | type pointer = Option<Box<Node>>;
[INFO] [stdout]    |      ^^^^^^^ help: convert the identifier to upper camel case: `Pointer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Cons`, `Nil`
[INFO] [stdout]  --> src/m12_reference_counting_pointer.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | use List::{Cons, Nil};
[INFO] [stdout]   |            ^^^^  ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition: `mad_skills`
[INFO] [stdout]  --> src/m14_macros.rs:1:14
[INFO] [stdout]   |
[INFO] [stdout] 1 | macro_rules! mad_skills {
[INFO] [stdout]   |              ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition: `string_concat`
[INFO] [stdout]   --> src/m14_macros.rs:14:14
[INFO] [stdout]    |
[INFO] [stdout] 14 | macro_rules! string_concat {
[INFO] [stdout]    |              ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition: `input`
[INFO] [stdout]   --> src/m14_macros.rs:25:14
[INFO] [stdout]    |
[INFO] [stdout] 25 | macro_rules! input {
[INFO] [stdout]    |              ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition: `my_vec`
[INFO] [stdout]   --> src/m14_macros.rs:38:14
[INFO] [stdout]    |
[INFO] [stdout] 38 | macro_rules! my_vec {
[INFO] [stdout]    |              ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `HashMap`, `HashSet`
[INFO] [stdout]  --> src/m8_collections.rs:1:24
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::{HashMap, HashSet};
[INFO] [stdout]   |                        ^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `alice_check`
[INFO] [stdout]   --> src/m5_lifetimes.rs:19:13
[INFO] [stdout]    |
[INFO] [stdout] 19 |         let alice_check = largest(&check_ag, alice.points);
[INFO] [stdout]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_alice_check`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `travel_1`
[INFO] [stdout]   --> src/m9_mods.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let travel_1 = travel_history::Conveyance::Car;
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_travel_1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `travel_2`
[INFO] [stdout]   --> src/m9_mods.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let travel_2 = travel_history::Conveyance::Air;
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_travel_2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `area_rect1`
[INFO] [stdout]   --> src/main.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 99 |     let area_rect1 = math_funcs::rect_area(&rect1.length, &rect1.width);
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_area_rect1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:79:9
[INFO] [stdout]    |
[INFO] [stdout] 79 |     let mut f = min;
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:80:9
[INFO] [stdout]    |
[INFO] [stdout] 80 |     let mut m = max;
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List` is never used
[INFO] [stdout]  --> src/m10_smart_pointers.rs:2:6
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum List {
[INFO] [stdout]   |      ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List` is never used
[INFO] [stdout]   --> src/m11_custom_smart_pointers.rs:61:6
[INFO] [stdout]    |
[INFO] [stdout] 61 | enum List {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MySmartPointer` is never constructed
[INFO] [stdout]   --> src/m11_custom_smart_pointers.rs:65:8
[INFO] [stdout]    |
[INFO] [stdout] 65 | struct MySmartPointer<T: std::fmt::Debug> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/m11_custom_smart_pointers.rs:70:8
[INFO] [stdout]    |
[INFO] [stdout] 69 | impl<T: std::fmt::Debug> MySmartPointer<T> {
[INFO] [stdout]    | ------------------------------------------ associated function in this implementation
[INFO] [stdout] 70 |     fn new(x: T) -> MySmartPointer<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `my_fn` is never used
[INFO] [stdout]   --> src/m11_custom_smart_pointers.rs:88:4
[INFO] [stdout]    |
[INFO] [stdout] 88 | fn my_fn(str: &str) {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `linked_list` is never constructed
[INFO] [stdout]  --> src/m12_linked_list.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct linked_list {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/m12_linked_list.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Node {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `pointer` is never used
[INFO] [stdout]   --> src/m12_linked_list.rs:12:6
[INFO] [stdout]    |
[INFO] [stdout] 12 | type pointer = Option<Box<Node>>;
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `create_empty_list`, `add`, and `remove` are never used
[INFO] [stdout]   --> src/m12_linked_list.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl linked_list {
[INFO] [stdout]    | ---------------- associated items in this implementation
[INFO] [stdout] 15 |     fn create_empty_list() -> linked_list {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     fn add(&mut self, element: i32) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 41 |     fn remove(&mut self) -> Option<i32> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List` is never used
[INFO] [stdout]  --> src/m12_reference_counting_pointer.rs:3:6
[INFO] [stdout]   |
[INFO] [stdout] 3 | enum List {
[INFO] [stdout]   |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `List` is never constructed
[INFO] [stdout]  --> src/m13_double_linked_list.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct List<T> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/m13_double_linked_list.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Node<T> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Pointer` is never used
[INFO] [stdout]   --> src/m13_double_linked_list.rs:15:6
[INFO] [stdout]    |
[INFO] [stdout] 15 | type Pointer<T> = Option<Rc<RefCell<Node<T>>>>;
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/m13_double_linked_list.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl<T: std::fmt::Display> Node<T> {
[INFO] [stdout]    | ---------------------------------- associated function in this implementation
[INFO] [stdout] 18 |     fn new(element: T) -> Rc<RefCell<Node<T>>> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `push_front` are never used
[INFO] [stdout]   --> src/m13_double_linked_list.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl<T: std::fmt::Display> List<T> {
[INFO] [stdout]    | ---------------------------------- associated items in this implementation
[INFO] [stdout] 28 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     fn push_front(&mut self, element: T) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `CarColour` is never used
[INFO] [stdout]  --> src/m1_enums.rs:2:6
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum CarColour {
[INFO] [stdout]   |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `GivenResult` is never used
[INFO] [stdout]   --> src/m1_enums.rs:10:6
[INFO] [stdout]    |
[INFO] [stdout] 10 | enum GivenResult<T, E> {
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `GivenOptions` is never used
[INFO] [stdout]   --> src/m1_enums.rs:17:6
[INFO] [stdout]    |
[INFO] [stdout] 17 | enum GivenOptions<T> {
[INFO] [stdout]    |      ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Conveyance` is never used
[INFO] [stdout]   --> src/m1_enums.rs:24:6
[INFO] [stdout]    |
[INFO] [stdout] 24 | enum Conveyance {
[INFO] [stdout]    |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `travel_allowance` is never used
[INFO] [stdout]   --> src/m1_enums.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | impl Conveyance {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 31 |     fn travel_allowance(&self, miles: i32) -> f32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `check_under_five` is never used
[INFO] [stdout]   --> src/m1_enums.rs:42:4
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn check_under_five(num_check: u8) -> GivenResult<u8, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `check_under_five_built_in` is never used
[INFO] [stdout]   --> src/m1_enums.rs:50:4
[INFO] [stdout]    |
[INFO] [stdout] 50 | fn check_under_five_built_in(num_check: u8) -> Result<u8, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `remainder_zero` is never used
[INFO] [stdout]   --> src/m1_enums.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn remainder_zero(num_check: f32) -> GivenOptions<f32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `handle_car_colour_red` is never used
[INFO] [stdout]   --> src/m1_enums.rs:67:4
[INFO] [stdout]    |
[INFO] [stdout] 67 | fn handle_car_colour_red() -> CarColour {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]  --> src/m2_structs.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct User {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `square` is never used
[INFO] [stdout]  --> src/m2_structs.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn square<T>(num: T) -> T
[INFO] [stdout]   |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `increment_signin_count`, `change_email`, and `change_username` are never used
[INFO] [stdout]   --> src/m2_structs.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl User {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 17 |     fn increment_signin_count(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |     fn change_email(&mut self, new_email: &str) {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     fn change_username(user: &mut User, new_username: &str) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `change_username` is never used
[INFO] [stdout]   --> src/m2_structs.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn change_username(user: &mut User, new_username: &str) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Attacker` is never used
[INFO] [stdout]  --> src/m3_trait.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | trait Attacker {
[INFO] [stdout]   |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `BasicStats` is never used
[INFO] [stdout]  --> src/m3_trait.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | trait BasicStats {
[INFO] [stdout]   |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Character` is never used
[INFO] [stdout]   --> src/m3_trait.rs:11:6
[INFO] [stdout]    |
[INFO] [stdout] 11 | enum Character {
[INFO] [stdout]    |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Data` is never constructed
[INFO] [stdout]   --> src/m3_trait.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Data {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `EthereumAddress` is never used
[INFO] [stdout]  --> src/m4_polymorphism.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | trait EthereumAddress {
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_ethereum_data` is never used
[INFO] [stdout]   --> src/m4_polymorphism.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn get_ethereum_data<T: EthereumAddress>(address: T) -> Address {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_lifetime` is never used
[INFO] [stdout]  --> src/m5_lifetimes.rs:2:4
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn test_lifetime() {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `largest` is never used
[INFO] [stdout]   --> src/m5_lifetimes.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn largest<'a, T: PartialOrd>(compare_1: &'a T, compare_2: &'a T) -> &'a T {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]   --> src/m5_lifetimes.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | struct Person<'b> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Message` is never used
[INFO] [stdout]  --> src/m6_patterns.rs:2:6
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum Message {
[INFO] [stdout]   |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process_message` is never used
[INFO] [stdout]  --> src/m6_patterns.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn process_message(msg: Message) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `my_async_call` is never used
[INFO] [stdout]  --> src/m7_async.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | async fn my_async_call(url: &str) -> Result<serde_json::Value, Error> {
[INFO] [stdout]   |          ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `allowance` is never used
[INFO] [stdout]  --> src/m9_mods.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn allowance() {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Conveyance` is never used
[INFO] [stdout]  --> src/m9_mods.rs:2:14
[INFO] [stdout]   |
[INFO] [stdout] 2 |     pub enum Conveyance {
[INFO] [stdout]   |              ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 56 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2m 03s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: wasm-bindgen v0.2.87
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "c1cd227ebec4ec5504c29e5fffa52e9d4eace80d8052e0f7ffd25bec20b7221e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1cd227ebec4ec5504c29e5fffa52e9d4eace80d8052e0f7ffd25bec20b7221e", kill_on_drop: false }`
[INFO] [stdout] c1cd227ebec4ec5504c29e5fffa52e9d4eace80d8052e0f7ffd25bec20b7221e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 71b82c138761ee496de117011cb14c4605b9ccc2b30350ec8a2a220e898c34be
[INFO] running `Command { std: "docker" "start" "-a" "71b82c138761ee496de117011cb14c4605b9ccc2b30350ec8a2a220e898c34be", kill_on_drop: false }`
[INFO] [stderr]    Compiling playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `List::Cons`
[INFO] [stdout]   --> src/m11_custom_smart_pointers.rs:95:9
[INFO] [stdout]    |
[INFO] [stdout] 95 |     use List::Cons;
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `linked_list` should have an upper camel case name
[INFO] [stdout]  --> src/m12_linked_list.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct linked_list {
[INFO] [stdout]   |        ^^^^^^^^^^^ help: convert the identifier to upper camel case: `LinkedList`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `pointer` should have an upper camel case name
[INFO] [stdout]   --> src/m12_linked_list.rs:12:6
[INFO] [stdout]    |
[INFO] [stdout] 12 | type pointer = Option<Box<Node>>;
[INFO] [stdout]    |      ^^^^^^^ help: convert the identifier to upper camel case: `Pointer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition: `input`
[INFO] [stdout]   --> src/m14_macros.rs:25:14
[INFO] [stdout]    |
[INFO] [stdout] 25 | macro_rules! input {
[INFO] [stdout]    |              ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/m14_macros.rs:20:38
[INFO] [stdout]    |
[INFO] [stdout] 20 |     $(temp_str.push_str($some_str);)*;
[INFO] [stdout]    |                                      ^ help: remove this semicolon
[INFO] [stdout] ...
[INFO] [stdout] 72 |         let str_null = string_concat!();
[INFO] [stdout]    |                        ---------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `string_concat` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/m14_macros.rs:20:38
[INFO] [stdout]    |
[INFO] [stdout] 20 |     $(temp_str.push_str($some_str);)*;
[INFO] [stdout]    |                                      ^ help: remove this semicolon
[INFO] [stdout] ...
[INFO] [stdout] 73 |         let str_single = string_concat!("First");
[INFO] [stdout]    |                          ----------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `string_concat` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/m14_macros.rs:20:38
[INFO] [stdout]    |
[INFO] [stdout] 20 |     $(temp_str.push_str($some_str);)*;
[INFO] [stdout]    |                                      ^ help: remove this semicolon
[INFO] [stdout] ...
[INFO] [stdout] 75 |         let str_multiple = string_concat!("Firts","Second");
[INFO] [stdout]    |                            -------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `string_concat` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ethers::types::Res`
[INFO] [stdout]   --> src/m7_async.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     use ethers::types::Res;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack_ref`
[INFO] [stdout]   --> src/m10_smart_pointers.rs:20:13
[INFO] [stdout]    |
[INFO] [stdout] 20 |         let stack_ref = &stack_var;
[INFO] [stdout]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_stack_ref`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `heap_var`
[INFO] [stdout]   --> src/m10_smart_pointers.rs:28:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |         let heap_var = Box::new(stack_var);
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_heap_var`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/m12_reference_counting_pointer.rs:20:13
[INFO] [stdout]    |
[INFO] [stdout] 20 |         let b = Rc::new(Cons(3, Rc::clone(&a)));
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/m12_reference_counting_pointer.rs:22:13
[INFO] [stdout]    |
[INFO] [stdout] 22 |         let c = Rc::new(Cons(4, Rc::clone(&a)));
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `list1`
[INFO] [stdout]   --> src/m13_double_linked_list.rs:59:17
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let mut list1: List<i32> = List::new();
[INFO] [stdout]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_list1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/m13_double_linked_list.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let mut list1: List<i32> = List::new();
[INFO] [stdout]    |             ----^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str_null`
[INFO] [stdout]   --> src/m14_macros.rs:72:13
[INFO] [stdout]    |
[INFO] [stdout] 72 |         let str_null = string_concat!();
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_str_null`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str_single`
[INFO] [stdout]   --> src/m14_macros.rs:73:13
[INFO] [stdout]    |
[INFO] [stdout] 73 |         let str_single = string_concat!("First");
[INFO] [stdout]    |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_str_single`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str_multiple`
[INFO] [stdout]   --> src/m14_macros.rs:75:13
[INFO] [stdout]    |
[INFO] [stdout] 75 |         let str_multiple = string_concat!("Firts","Second");
[INFO] [stdout]    |             ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_str_multiple`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `some_var`
[INFO] [stdout]   --> src/m14_macros.rs:77:13
[INFO] [stdout]    |
[INFO] [stdout] 77 |         let some_var = mad_skills!(i32);
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_var`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/m14_macros.rs:78:17
[INFO] [stdout]    |
[INFO] [stdout] 78 |         let mut x: Vec<i32>  = vec!();
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/m14_macros.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 |         let mut temp_str = String::new();
[INFO] [stdout]    |             ----^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 72 |         let str_null = string_concat!();
[INFO] [stdout]    |                        ---------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `string_concat` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/m14_macros.rs:78:13
[INFO] [stdout]    |
[INFO] [stdout] 78 |         let mut x: Vec<i32>  = vec!();
[INFO] [stdout]    |             ----^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/m14_macros.rs:79:13
[INFO] [stdout]    |
[INFO] [stdout] 79 |         let mut y = my_vec!(1,2,3,4);
[INFO] [stdout]    |             ----^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `addr`
[INFO] [stdout]   --> src/m4_polymorphism.rs:35:13
[INFO] [stdout]    |
[INFO] [stdout] 35 |         let addr: Address =
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_addr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `alice_check`
[INFO] [stdout]   --> src/m5_lifetimes.rs:19:13
[INFO] [stdout]    |
[INFO] [stdout] 19 |         let alice_check = largest(&check_ag, alice.points);
[INFO] [stdout]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_alice_check`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `prob_none`
[INFO] [stdout]   --> src/m6_patterns.rs:46:13
[INFO] [stdout]    |
[INFO] [stdout] 46 |         let prob_none: Option<i32> = None;
[INFO] [stdout]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_prob_none`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `person1`
[INFO] [stdout]   --> src/m8_collections.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |         let person1 = "alice";
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_person1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `person2`
[INFO] [stdout]   --> src/m8_collections.rs:13:13
[INFO] [stdout]    |
[INFO] [stdout] 13 |         let person2 = "bob";
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_person2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `travel_1`
[INFO] [stdout]   --> src/m9_mods.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let travel_1 = travel_history::Conveyance::Car;
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_travel_1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `travel_2`
[INFO] [stdout]   --> src/m9_mods.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let travel_2 = travel_history::Conveyance::Air;
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_travel_2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `area_rect1`
[INFO] [stdout]   --> src/main.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 99 |     let area_rect1 = math_funcs::rect_area(&rect1.length, &rect1.width);
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_area_rect1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:79:9
[INFO] [stdout]    |
[INFO] [stdout] 79 |     let mut f = min;
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:80:9
[INFO] [stdout]    |
[INFO] [stdout] 80 |     let mut m = max;
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> src/m10_smart_pointers.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 |     Cons(i32, Box<List>),
[INFO] [stdout]   |     ---- ^^^  ^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     fields in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]   |
[INFO] [stdout] 3 |     Cons((), ()),
[INFO] [stdout]   |          ~~  ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List` is never used
[INFO] [stdout]   --> src/m11_custom_smart_pointers.rs:61:6
[INFO] [stdout]    |
[INFO] [stdout] 61 | enum List {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> src/m12_reference_counting_pointer.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 |     Cons(i32, Rc<List>),
[INFO] [stdout]   |     ---- ^^^  ^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     fields in this variant
[INFO] [stdout]   |
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]   |
[INFO] [stdout] 4 |     Cons((), ()),
[INFO] [stdout]   |          ~~  ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `head` and `tail` are never read
[INFO] [stdout]  --> src/m13_double_linked_list.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct List<T> {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] 5 |     head: Pointer<T>,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 6 |     tail: Pointer<T>,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `element`, `next`, and `prev` are never read
[INFO] [stdout]   --> src/m13_double_linked_list.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 9  | struct Node<T> {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 10 |     element: T,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 11 |     next: Pointer<T>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 12 |     prev: Pointer<T>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/m13_double_linked_list.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl<T: std::fmt::Display> Node<T> {
[INFO] [stdout]    | ---------------------------------- associated function in this implementation
[INFO] [stdout] 18 |     fn new(element: T) -> Rc<RefCell<Node<T>>> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `push_front` is never used
[INFO] [stdout]   --> src/m13_double_linked_list.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl<T: std::fmt::Display> List<T> {
[INFO] [stdout]    | ---------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 35 |     fn push_front(&mut self, element: T) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Green`, `Blue`, and `Silver` are never constructed
[INFO] [stdout]  --> src/m1_enums.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum CarColour {
[INFO] [stdout]   |      --------- variants in this enum
[INFO] [stdout] 3 |     Red,
[INFO] [stdout] 4 |     Green,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 5 |     Blue,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 6 |     Silver,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `CarColour` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Train` and `Air` are never constructed
[INFO] [stdout]   --> src/m1_enums.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | enum Conveyance {
[INFO] [stdout]    |      ---------- variants in this enum
[INFO] [stdout] 25 |     Car = 15,
[INFO] [stdout] 26 |     Train = 20,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 27 |     Air = 30,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Conveyance` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `email` and `active` are never read
[INFO] [stdout]  --> src/m2_structs.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct User {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] 3 |     username: String,
[INFO] [stdout] 4 |     email: String,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 5 |     sign_in_count: u64,
[INFO] [stdout] 6 |     active: bool,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `User` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `change_email` and `change_username` are never used
[INFO] [stdout]   --> src/m2_structs.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl User {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 21 |     fn change_email(&mut self, new_email: &str) {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     fn change_username(user: &mut User, new_username: &str) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `BasicStats` is never used
[INFO] [stdout]  --> src/m3_trait.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | trait BasicStats {
[INFO] [stdout]   |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Warrior` and `Wizard` are never constructed
[INFO] [stdout]   --> src/m3_trait.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | enum Character {
[INFO] [stdout]    |      --------- variants in this enum
[INFO] [stdout] 12 |     Warrior,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 13 |     Archer,
[INFO] [stdout] 14 |     Wizard,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Character` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Data` is never constructed
[INFO] [stdout]   --> src/m3_trait.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Data {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_lifetime` is never used
[INFO] [stdout]  --> src/m5_lifetimes.rs:2:4
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn test_lifetime() {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `largest` is never used
[INFO] [stdout]   --> src/m5_lifetimes.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn largest<'a, T: PartialOrd>(compare_1: &'a T, compare_2: &'a T) -> &'a T {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]   --> src/m5_lifetimes.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | struct Person<'b> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `allowance` is never used
[INFO] [stdout]  --> src/m9_mods.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn allowance() {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Conveyance` is never used
[INFO] [stdout]  --> src/m9_mods.rs:2:14
[INFO] [stdout]   |
[INFO] [stdout] 2 |     pub enum Conveyance {
[INFO] [stdout]   |              ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/m1_enums.rs:94:9
[INFO] [stdout]    |
[INFO] [stdout] 94 |         dbg!(is_under_five_res_buil_in);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 52 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 7.91s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: wasm-bindgen v0.2.87
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "71b82c138761ee496de117011cb14c4605b9ccc2b30350ec8a2a220e898c34be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71b82c138761ee496de117011cb14c4605b9ccc2b30350ec8a2a220e898c34be", kill_on_drop: false }`
[INFO] [stdout] 71b82c138761ee496de117011cb14c4605b9ccc2b30350ec8a2a220e898c34be
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ab4ee032cdec174afa9c7a2d4807d4e3cd34eb72cf1fa643e7153e6e72e10d96
[INFO] running `Command { std: "docker" "start" "-a" "ab4ee032cdec174afa9c7a2d4807d4e3cd34eb72cf1fa643e7153e6e72e10d96", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `List::Cons`
[INFO] [stderr]   --> src/m11_custom_smart_pointers.rs:95:9
[INFO] [stderr]    |
[INFO] [stderr] 95 |     use List::Cons;
[INFO] [stderr]    |         ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `linked_list` should have an upper camel case name
[INFO] [stderr]  --> src/m12_linked_list.rs:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 | struct linked_list {
[INFO] [stderr]   |        ^^^^^^^^^^^ help: convert the identifier to upper camel case: `LinkedList`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `pointer` should have an upper camel case name
[INFO] [stderr]   --> src/m12_linked_list.rs:12:6
[INFO] [stderr]    |
[INFO] [stderr] 12 | type pointer = Option<Box<Node>>;
[INFO] [stderr]    |      ^^^^^^^ help: convert the identifier to upper camel case: `Pointer`
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition: `input`
[INFO] [stderr]   --> src/m14_macros.rs:25:14
[INFO] [stderr]    |
[INFO] [stderr] 25 | macro_rules! input {
[INFO] [stderr]    |              ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_macros)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]   --> src/m14_macros.rs:20:38
[INFO] [stderr]    |
[INFO] [stderr] 20 |     $(temp_str.push_str($some_str);)*;
[INFO] [stderr]    |                                      ^ help: remove this semicolon
[INFO] [stderr] ...
[INFO] [stderr] 72 |         let str_null = string_concat!();
[INFO] [stderr]    |                        ---------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stderr]    = note: this warning originates in the macro `string_concat` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]   --> src/m14_macros.rs:20:38
[INFO] [stderr]    |
[INFO] [stderr] 20 |     $(temp_str.push_str($some_str);)*;
[INFO] [stderr]    |                                      ^ help: remove this semicolon
[INFO] [stderr] ...
[INFO] [stderr] 73 |         let str_single = string_concat!("First");
[INFO] [stderr]    |                          ----------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `string_concat` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]   --> src/m14_macros.rs:20:38
[INFO] [stderr]    |
[INFO] [stderr] 20 |     $(temp_str.push_str($some_str);)*;
[INFO] [stderr]    |                                      ^ help: remove this semicolon
[INFO] [stderr] ...
[INFO] [stderr] 75 |         let str_multiple = string_concat!("Firts","Second");
[INFO] [stderr]    |                            -------------------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `string_concat` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ethers::types::Res`
[INFO] [stderr]   --> src/m7_async.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |     use ethers::types::Res;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `stack_ref`
[INFO] [stderr]   --> src/m10_smart_pointers.rs:20:13
[INFO] [stderr]    |
[INFO] [stderr] 20 |         let stack_ref = &stack_var;
[INFO] [stderr]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_stack_ref`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `heap_var`
[INFO] [stderr]   --> src/m10_smart_pointers.rs:28:13
[INFO] [stderr]    |
[INFO] [stderr] 28 |         let heap_var = Box::new(stack_var);
[INFO] [stderr]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_heap_var`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/m12_reference_counting_pointer.rs:20:13
[INFO] [stderr]    |
[INFO] [stderr] 20 |         let b = Rc::new(Cons(3, Rc::clone(&a)));
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]   --> src/m12_reference_counting_pointer.rs:22:13
[INFO] [stderr]    |
[INFO] [stderr] 22 |         let c = Rc::new(Cons(4, Rc::clone(&a)));
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `list1`
[INFO] [stderr]   --> src/m13_double_linked_list.rs:59:17
[INFO] [stderr]    |
[INFO] [stderr] 59 |         let mut list1: List<i32> = List::new();
[INFO] [stderr]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_list1`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/m13_double_linked_list.rs:59:13
[INFO] [stderr]    |
[INFO] [stderr] 59 |         let mut list1: List<i32> = List::new();
[INFO] [stderr]    |             ----^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `str_null`
[INFO] [stderr]   --> src/m14_macros.rs:72:13
[INFO] [stderr]    |
[INFO] [stderr] 72 |         let str_null = string_concat!();
[INFO] [stderr]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_str_null`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `str_single`
[INFO] [stderr]   --> src/m14_macros.rs:73:13
[INFO] [stderr]    |
[INFO] [stderr] 73 |         let str_single = string_concat!("First");
[INFO] [stderr]    |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_str_single`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `str_multiple`
[INFO] [stderr]   --> src/m14_macros.rs:75:13
[INFO] [stderr]    |
[INFO] [stderr] 75 |         let str_multiple = string_concat!("Firts","Second");
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_str_multiple`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `some_var`
[INFO] [stderr]   --> src/m14_macros.rs:77:13
[INFO] [stderr]    |
[INFO] [stderr] 77 |         let some_var = mad_skills!(i32);
[INFO] [stderr]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_var`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/m14_macros.rs:78:17
[INFO] [stderr]    |
[INFO] [stderr] 78 |         let mut x: Vec<i32>  = vec!();
[INFO] [stderr]    |                 ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/m14_macros.rs:18:13
[INFO] [stderr]    |
[INFO] [stderr] 18 |         let mut temp_str = String::new();
[INFO] [stderr]    |             ----^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] ...
[INFO] [stderr] 72 |         let str_null = string_concat!();
[INFO] [stderr]    |                        ---------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `string_concat` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/m14_macros.rs:78:13
[INFO] [stderr]    |
[INFO] [stderr] 78 |         let mut x: Vec<i32>  = vec!();
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/m14_macros.rs:79:13
[INFO] [stderr]    |
[INFO] [stderr] 79 |         let mut y = my_vec!(1,2,3,4);
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `addr`
[INFO] [stderr]   --> src/m4_polymorphism.rs:35:13
[INFO] [stderr]    |
[INFO] [stderr] 35 |         let addr: Address =
[INFO] [stderr]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_addr`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `alice_check`
[INFO] [stderr]   --> src/m5_lifetimes.rs:19:13
[INFO] [stderr]    |
[INFO] [stderr] 19 |         let alice_check = largest(&check_ag, alice.points);
[INFO] [stderr]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_alice_check`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `prob_none`
[INFO] [stderr]   --> src/m6_patterns.rs:46:13
[INFO] [stderr]    |
[INFO] [stderr] 46 |         let prob_none: Option<i32> = None;
[INFO] [stderr]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_prob_none`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `person1`
[INFO] [stderr]   --> src/m8_collections.rs:12:13
[INFO] [stderr]    |
[INFO] [stderr] 12 |         let person1 = "alice";
[INFO] [stderr]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_person1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `person2`
[INFO] [stderr]   --> src/m8_collections.rs:13:13
[INFO] [stderr]    |
[INFO] [stderr] 13 |         let person2 = "bob";
[INFO] [stderr]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_person2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `travel_1`
[INFO] [stderr]   --> src/m9_mods.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let travel_1 = travel_history::Conveyance::Car;
[INFO] [stderr]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_travel_1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `travel_2`
[INFO] [stderr]   --> src/m9_mods.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let travel_2 = travel_history::Conveyance::Air;
[INFO] [stderr]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_travel_2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `area_rect1`
[INFO] [stderr]   --> src/main.rs:99:9
[INFO] [stderr]    |
[INFO] [stderr] 99 |     let area_rect1 = math_funcs::rect_area(&rect1.length, &rect1.width);
[INFO] [stderr]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_area_rect1`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:79:9
[INFO] [stderr]    |
[INFO] [stderr] 79 |     let mut f = min;
[INFO] [stderr]    |         ----^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:80:9
[INFO] [stderr]    |
[INFO] [stderr] 80 |     let mut m = max;
[INFO] [stderr]    |         ----^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: fields `0` and `1` are never read
[INFO] [stderr]  --> src/m10_smart_pointers.rs:3:10
[INFO] [stderr]   |
[INFO] [stderr] 3 |     Cons(i32, Box<List>),
[INFO] [stderr]   |     ---- ^^^  ^^^^^^^^^
[INFO] [stderr]   |     |
[INFO] [stderr]   |     fields in this variant
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stderr]   |
[INFO] [stderr] 3 |     Cons((), ()),
[INFO] [stderr]   |          ~~  ~~
[INFO] [stderr] 
[INFO] [stderr] warning: enum `List` is never used
[INFO] [stderr]   --> src/m11_custom_smart_pointers.rs:61:6
[INFO] [stderr]    |
[INFO] [stderr] 61 | enum List {
[INFO] [stderr]    |      ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: fields `0` and `1` are never read
[INFO] [stderr]  --> src/m12_reference_counting_pointer.rs:4:10
[INFO] [stderr]   |
[INFO] [stderr] 4 |     Cons(i32, Rc<List>),
[INFO] [stderr]   |     ---- ^^^  ^^^^^^^^
[INFO] [stderr]   |     |
[INFO] [stderr]   |     fields in this variant
[INFO] [stderr]   |
[INFO] [stderr] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stderr]   |
[INFO] [stderr] 4 |     Cons((), ()),
[INFO] [stderr]   |          ~~  ~~
[INFO] [stderr] 
[INFO] [stderr] warning: fields `head` and `tail` are never read
[INFO] [stderr]  --> src/m13_double_linked_list.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | struct List<T> {
[INFO] [stderr]   |        ---- fields in this struct
[INFO] [stderr] 5 |     head: Pointer<T>,
[INFO] [stderr]   |     ^^^^
[INFO] [stderr] 6 |     tail: Pointer<T>,
[INFO] [stderr]   |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: fields `element`, `next`, and `prev` are never read
[INFO] [stderr]   --> src/m13_double_linked_list.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 9  | struct Node<T> {
[INFO] [stderr]    |        ---- fields in this struct
[INFO] [stderr] 10 |     element: T,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 11 |     next: Pointer<T>,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 12 |     prev: Pointer<T>,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/m13_double_linked_list.rs:18:8
[INFO] [stderr]    |
[INFO] [stderr] 17 | impl<T: std::fmt::Display> Node<T> {
[INFO] [stderr]    | ---------------------------------- associated function in this implementation
[INFO] [stderr] 18 |     fn new(element: T) -> Rc<RefCell<Node<T>>> {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `push_front` is never used
[INFO] [stderr]   --> src/m13_double_linked_list.rs:35:8
[INFO] [stderr]    |
[INFO] [stderr] 27 | impl<T: std::fmt::Display> List<T> {
[INFO] [stderr]    | ---------------------------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 35 |     fn push_front(&mut self, element: T) {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Green`, `Blue`, and `Silver` are never constructed
[INFO] [stderr]  --> src/m1_enums.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | enum CarColour {
[INFO] [stderr]   |      --------- variants in this enum
[INFO] [stderr] 3 |     Red,
[INFO] [stderr] 4 |     Green,
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr] 5 |     Blue,
[INFO] [stderr]   |     ^^^^
[INFO] [stderr] 6 |     Silver,
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `CarColour` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Train` and `Air` are never constructed
[INFO] [stderr]   --> src/m1_enums.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 24 | enum Conveyance {
[INFO] [stderr]    |      ---------- variants in this enum
[INFO] [stderr] 25 |     Car = 15,
[INFO] [stderr] 26 |     Train = 20,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 27 |     Air = 30,
[INFO] [stderr]    |     ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Conveyance` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: fields `email` and `active` are never read
[INFO] [stderr]  --> src/m2_structs.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | struct User {
[INFO] [stderr]   |        ---- fields in this struct
[INFO] [stderr] 3 |     username: String,
[INFO] [stderr] 4 |     email: String,
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr] 5 |     sign_in_count: u64,
[INFO] [stderr] 6 |     active: bool,
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `User` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `change_email` and `change_username` are never used
[INFO] [stderr]   --> src/m2_structs.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 16 | impl User {
[INFO] [stderr]    | --------- associated items in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 21 |     fn change_email(&mut self, new_email: &str) {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 25 |     fn change_username(user: &mut User, new_username: &str) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `BasicStats` is never used
[INFO] [stderr]  --> src/m3_trait.rs:5:7
[INFO] [stderr]   |
[INFO] [stderr] 5 | trait BasicStats {
[INFO] [stderr]   |       ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Warrior` and `Wizard` are never constructed
[INFO] [stderr]   --> src/m3_trait.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | enum Character {
[INFO] [stderr]    |      --------- variants in this enum
[INFO] [stderr] 12 |     Warrior,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 13 |     Archer,
[INFO] [stderr] 14 |     Wizard,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Character` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Data` is never constructed
[INFO] [stderr]   --> src/m3_trait.rs:19:8
[INFO] [stderr]    |
[INFO] [stderr] 19 | struct Data {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_lifetime` is never used
[INFO] [stderr]  --> src/m5_lifetimes.rs:2:4
[INFO] [stderr]   |
[INFO] [stderr] 2 | fn test_lifetime() {
[INFO] [stderr]   |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `largest` is never used
[INFO] [stderr]   --> src/m5_lifetimes.rs:26:4
[INFO] [stderr]    |
[INFO] [stderr] 26 | fn largest<'a, T: PartialOrd>(compare_1: &'a T, compare_2: &'a T) -> &'a T {
[INFO] [stderr]    |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Person` is never constructed
[INFO] [stderr]   --> src/m5_lifetimes.rs:34:8
[INFO] [stderr]    |
[INFO] [stderr] 34 | struct Person<'b> {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `allowance` is never used
[INFO] [stderr]  --> src/m9_mods.rs:9:8
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub fn allowance() {
[INFO] [stderr]   |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `Conveyance` is never used
[INFO] [stderr]  --> src/m9_mods.rs:2:14
[INFO] [stderr]   |
[INFO] [stderr] 2 |     pub enum Conveyance {
[INFO] [stderr]   |              ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/m1_enums.rs:94:9
[INFO] [stderr]    |
[INFO] [stderr] 94 |         dbg!(is_under_five_res_buil_in);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this warning originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `playground` (bin "playground" test) generated 52 warnings (run `cargo fix --bin "playground" --tests` to apply 8 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.32s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: wasm-bindgen v0.2.87
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/playground-9fcacd252cd6ca63)
[INFO] [stdout] 
[INFO] [stdout] running 16 tests
[INFO] [stdout] test m2_structs::test::tests_struct ... ok
[INFO] [stdout] test m13_double_linked_list::test::test_dbl_list ... ok
[INFO] [stdout] test m1_enums::test::test_enums ... ok
[INFO] [stdout] test m14_macros::test::test_macro ... ok
[INFO] [stdout] test m12_reference_counting_pointer::test::test_rc_pointer ... ok
[INFO] [stdout] test m12_linked_list::test::test_linked_list ... ok
[INFO] [stdout] test m3_trait::test::test_traits ... ok
[INFO] [stdout] test m11_custom_smart_pointers::test::test_custom_smart_pointer_2 ... ok
[INFO] [stdout] test m10_smart_pointers::test::test_smart_pointer ... ok
[INFO] [stdout] test m4_polymorphism::test::test_poly ... ok
[INFO] [stdout] test m8_collections::test::tests_hashmap ... ok
[INFO] [stdout] test m8_collections::test::tests_hashset ... ok
[INFO] [stdout] test m6_patterns::test::test_match_option ... ok
[INFO] [stdout] test m6_patterns::test::test_match_literals ... ok
[INFO] [stdout] test m6_patterns::test::test_large_enum ... ok
[INFO] [stdout] test m7_async::tests::test_calls_async_fn ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- m7_async::tests::test_calls_async_fn stdout ----
[INFO] [stdout] thread 'm7_async::tests::test_calls_async_fn' panicked at src/m7_async.rs:34:17:
[INFO] [stdout] failed to make api request
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x56488cd7e785 - std::backtrace_rs::backtrace::libunwind::trace::he49dc9a9e3164223
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
[INFO] [stdout]    1:     0x56488cd7e785 - std::backtrace_rs::backtrace::trace_unsynchronized::h3a3e77c68030aa6b
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x56488cd7e785 - std::sys_common::backtrace::_print_fmt::h9479ad2f99afd5d4
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stdout]    3:     0x56488cd7e785 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hfb01aa1fa3fb1821
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x56488cda937b - core::fmt::rt::Argument::fmt::h125e56152abbc1c3
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/fmt/rt.rs:165:63
[INFO] [stdout]    5:     0x56488cda937b - core::fmt::write::hb0ab4ff05ccfe741
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/fmt/mod.rs:1169:21
[INFO] [stdout]    6:     0x56488cd7b50f - std::io::Write::write_fmt::hea6336dbf2fa00b8
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/io/mod.rs:1835:15
[INFO] [stdout]    7:     0x56488cd7e55e - std::sys_common::backtrace::_print::h79ca548f3a2adf4b
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    8:     0x56488cd7e55e - std::sys_common::backtrace::print::h9aebf997b2fea2d3
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    9:     0x56488cd7fec9 - std::panicking::default_hook::{{closure}}::h68a0954af2694526
[INFO] [stdout]   10:     0x56488cd7fc1c - std::panicking::default_hook::h5be50cc6849ffb00
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:295:9
[INFO] [stdout]   11:     0x56488c782aef - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hd874405dcbd1d3ed
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/alloc/src/boxed.rs:2036:9
[INFO] [stdout]   12:     0x56488c782aef - test::test_main::{{closure}}::h4f26a9df34a84b94
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:137:21
[INFO] [stdout]   13:     0x56488cd804cb - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h00e96d9c62aa9a12
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/alloc/src/boxed.rs:2036:9
[INFO] [stdout]   14:     0x56488cd804cb - std::panicking::rust_panic_with_hook::h3c0df6036729334c
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:799:13
[INFO] [stdout]   15:     0x56488cd8020b - std::panicking::begin_panic_handler::{{closure}}::ha3a21e93c4cfd807
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:656:13
[INFO] [stdout]   16:     0x56488cd7ec49 - std::sys_common::backtrace::__rust_end_short_backtrace::h19508a8f8ae71dc9
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:171:18
[INFO] [stdout]   17:     0x56488cd7ff77 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:652:5
[INFO] [stdout]   18:     0x56488c73c0c3 - core::panicking::panic_fmt::h2ba8af99174d83ea
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/panicking.rs:72:14
[INFO] [stdout]   19:     0x56488c74c3d6 - playground::m7_async::tests::test_calls_async_fn::{{closure}}::h2d553b38d38d3573
[INFO] [stdout]                                at /opt/rustwide/workdir/src/m7_async.rs:34:17
[INFO] [stdout]   20:     0x56488c747ef2 - <core::pin::Pin<P> as core::future::future::Future>::poll::he3df29135b5a208c
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/future/future.rs:123:9
[INFO] [stdout]   21:     0x56488c747ead - <core::pin::Pin<P> as core::future::future::Future>::poll::hda3b91e2f48fbe42
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/future/future.rs:123:9
[INFO] [stdout]   22:     0x56488c74218f - tokio::runtime::scheduler::current_thread::CoreGuard::block_on::{{closure}}::{{closure}}::{{closure}}::h5d1f9c205aea5c72
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/scheduler/current_thread/mod.rs:665:57
[INFO] [stdout]   23:     0x56488c7420c5 - tokio::runtime::coop::with_budget::ha75028a1c2491267
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/coop.rs:107:5
[INFO] [stdout]   24:     0x56488c7420c5 - tokio::runtime::coop::budget::he91c83ad146f5199
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/coop.rs:73:5
[INFO] [stdout]   25:     0x56488c7420c5 - tokio::runtime::scheduler::current_thread::CoreGuard::block_on::{{closure}}::{{closure}}::hb6f6fe15945e07e4
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/scheduler/current_thread/mod.rs:665:25
[INFO] [stdout]   26:     0x56488c740e70 - tokio::runtime::scheduler::current_thread::Context::enter::hf8dd2951ce5bf612
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/scheduler/current_thread/mod.rs:410:19
[INFO] [stdout]   27:     0x56488c74192e - tokio::runtime::scheduler::current_thread::CoreGuard::block_on::{{closure}}::hd0686449fa1ad8bc
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/scheduler/current_thread/mod.rs:664:36
[INFO] [stdout]   28:     0x56488c7416a4 - tokio::runtime::scheduler::current_thread::CoreGuard::enter::{{closure}}::h89acce1e5424d34a
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/scheduler/current_thread/mod.rs:743:68
[INFO] [stdout]   29:     0x56488c73fd2b - tokio::runtime::context::scoped::Scoped<T>::set::h07f38b6a9ac9fdb6
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/context/scoped.rs:40:9
[INFO] [stdout]   30:     0x56488c747639 - tokio::runtime::context::set_scheduler::{{closure}}::h6783c691a9427274
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/context.rs:176:26
[INFO] [stdout]   31:     0x56488c745610 - std::thread::local::LocalKey<T>::try_with::h9047f0e7a75cc9af
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/thread/local.rs:286:12
[INFO] [stdout]   32:     0x56488c7452ca - std::thread::local::LocalKey<T>::with::h2979799d65a827e5
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/thread/local.rs:262:9
[INFO] [stdout]   33:     0x56488c7475ed - tokio::runtime::context::set_scheduler::h299c22c3b77d308d
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/context.rs:176:9
[INFO] [stdout]   34:     0x56488c741450 - tokio::runtime::scheduler::current_thread::CoreGuard::enter::had9888883802dfb8
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/scheduler/current_thread/mod.rs:743:27
[INFO] [stdout]   35:     0x56488c7416c3 - tokio::runtime::scheduler::current_thread::CoreGuard::block_on::hab1e95ed11f25c5d
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/scheduler/current_thread/mod.rs:652:19
[INFO] [stdout]   36:     0x56488c7407c3 - tokio::runtime::scheduler::current_thread::CurrentThread::block_on::{{closure}}::h0d8caaf2b925358f
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/scheduler/current_thread/mod.rs:175:28
[INFO] [stdout]   37:     0x56488c740076 - tokio::runtime::context::runtime::enter_runtime::hb37c85c34cf7b4b6
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/context/runtime.rs:65:16
[INFO] [stdout]   38:     0x56488c740721 - tokio::runtime::scheduler::current_thread::CurrentThread::block_on::h0768347b94674581
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/scheduler/current_thread/mod.rs:167:9
[INFO] [stdout]   39:     0x56488c74057d - tokio::runtime::runtime::Runtime::block_on::h313a7c1b9369966e
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/runtime.rs:347:47
[INFO] [stdout]   40:     0x56488c74bdf1 - playground::m7_async::tests::test_calls_async_fn::hd32c6f5ff1a11f2d
[INFO] [stdout]                                at /opt/rustwide/workdir/src/m7_async.rs:29:9
[INFO] [stdout]   41:     0x56488c74bc97 - playground::m7_async::tests::test_calls_async_fn::{{closure}}::h903179863d9baa1e
[INFO] [stdout]                                at /opt/rustwide/workdir/src/m7_async.rs:24:35
[INFO] [stdout]   42:     0x56488c73d5b6 - core::ops::function::FnOnce::call_once::h34f382171c2a7316
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   43:     0x56488c78740b - core::ops::function::FnOnce::call_once::h18c6bf92212b87a4
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   44:     0x56488c78740b - test::__rust_begin_short_backtrace::hdcf0edcfa9080086
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:625:18
[INFO] [stdout]   45:     0x56488c786ad1 - test::run_test_in_process::{{closure}}::heac2c4eb375d2d10
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:648:60
[INFO] [stdout]   46:     0x56488c786ad1 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h0289bafc8a1cc004
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   47:     0x56488c786ad1 - std::panicking::try::do_call::h5e158f1ad8a5f983
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:559:40
[INFO] [stdout]   48:     0x56488c786ad1 - std::panicking::try::hea3411d60321c4de
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:523:19
[INFO] [stdout]   49:     0x56488c786ad1 - std::panic::catch_unwind::hafb7bb18bc47bbc7
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panic.rs:149:14
[INFO] [stdout]   50:     0x56488c786ad1 - test::run_test_in_process::h74dd138dc7762d99
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:648:27
[INFO] [stdout]   51:     0x56488c786ad1 - test::run_test::{{closure}}::h6b390822e63606cf
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:569:43
[INFO] [stdout]   52:     0x56488c74f4a4 - test::run_test::{{closure}}::h6e11dba8131d354b
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:599:41
[INFO] [stdout]   53:     0x56488c74f4a4 - std::sys_common::backtrace::__rust_begin_short_backtrace::ha71b3541b59bdbbb
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:155:18
[INFO] [stdout]   54:     0x56488c753f72 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hef92127c5ef9e53c
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/thread/mod.rs:542:17
[INFO] [stdout]   55:     0x56488c753f72 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h859c109f9d11c92b
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   56:     0x56488c753f72 - std::panicking::try::do_call::hbf534c458cd858f0
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:559:40
[INFO] [stdout]   57:     0x56488c753f72 - std::panicking::try::h65c18365a7b9ad90
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:523:19
[INFO] [stdout]   58:     0x56488c753f72 - std::panic::catch_unwind::h21b25d4c69478c39
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panic.rs:149:14
[INFO] [stdout]   59:     0x56488c753f72 - std::thread::Builder::spawn_unchecked_::{{closure}}::h23335f620275a9bf
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/thread/mod.rs:541:30
[INFO] [stdout]   60:     0x56488c753f72 - core::ops::function::FnOnce::call_once{{vtable.shim}}::hb491dc55513e9b7c
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   61:     0x56488cd84abb - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h41b39260afcffdc9
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/alloc/src/boxed.rs:2022:9
[INFO] [stdout]   62:     0x56488cd84abb - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h6694c8dc6dd010c4
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/alloc/src/boxed.rs:2022:9
[INFO] [stdout]   63:     0x56488cd84abb - std::sys::pal::unix::thread::Thread::new::thread_start::hf16038e1c8e19c99
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys/pal/unix/thread.rs:108:17
[INFO] [stdout]   64:     0x7f9943b6fac3 - <unknown>
[INFO] [stdout]   65:     0x7f9943c00a04 - __clone
[INFO] [stdout]   66:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     m7_async::tests::test_calls_async_fn
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 15 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.28s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin playground`
[INFO] running `Command { std: "docker" "inspect" "ab4ee032cdec174afa9c7a2d4807d4e3cd34eb72cf1fa643e7153e6e72e10d96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab4ee032cdec174afa9c7a2d4807d4e3cd34eb72cf1fa643e7153e6e72e10d96", kill_on_drop: false }`
[INFO] [stdout] ab4ee032cdec174afa9c7a2d4807d4e3cd34eb72cf1fa643e7153e6e72e10d96
