[INFO] fetching crate learn_rust999999911111999 0.1.0...
[INFO] testing learn_rust999999911111999-0.1.0 against master#cdb45c87e2cd43495379f7e867e3cc15dcee9f93 for pr-145838-1
[INFO] extracting crate learn_rust999999911111999 0.1.0 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate learn_rust999999911111999 0.1.0
[INFO] finished tweaking crates.io crate learn_rust999999911111999 0.1.0
[INFO] tweaked toml for crates.io crate learn_rust999999911111999 0.1.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate learn_rust999999911111999 0.1.0 on toolchain cdb45c87e2cd43495379f7e867e3cc15dcee9f93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate learn_rust999999911111999 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded array_tool v1.0.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 227c9a947613fd2e2ed68f2e2a345beccbe0b229f8da5455e68031cbf3df4c06
[INFO] running `Command { std: "docker" "start" "-a" "227c9a947613fd2e2ed68f2e2a345beccbe0b229f8da5455e68031cbf3df4c06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "227c9a947613fd2e2ed68f2e2a345beccbe0b229f8da5455e68031cbf3df4c06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "227c9a947613fd2e2ed68f2e2a345beccbe0b229f8da5455e68031cbf3df4c06", kill_on_drop: false }`
[INFO] [stdout] 227c9a947613fd2e2ed68f2e2a345beccbe0b229f8da5455e68031cbf3df4c06
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b538df3aee4f395739c288bc6617a80478b80749dfe496e376bd17fa157ac6b3
[INFO] running `Command { std: "docker" "start" "-a" "b538df3aee4f395739c288bc6617a80478b80749dfe496e376bd17fa157ac6b3", kill_on_drop: false }`
[INFO] [stderr]    Compiling array_tool v1.0.3
[INFO] [stderr]    Compiling learn_rust999999911111999 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `id`, `name`, and `email` are never read
[INFO] [stdout]   --> src/lib.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub struct Customer {
[INFO] [stdout]    |                -------- fields in this struct
[INFO] [stdout] 58 |         id: u64,
[INFO] [stdout]    |         ^^
[INFO] [stdout] 59 |         name: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 60 |         email: String,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id` and `customer` are never read
[INFO] [stdout]   --> src/lib.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 73 |     pub struct Order {
[INFO] [stdout]    |                ----- fields in this struct
[INFO] [stdout] 74 |         id: u64,
[INFO] [stdout]    |         ^^
[INFO] [stdout] 75 |         product: Product,
[INFO] [stdout] 76 |         customer: Customer,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `CircleArea`, `RectangleArea`, and `Perimeter` are never constructed
[INFO] [stdout]  --> src/bin/optionTask.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | enum Measurement {
[INFO] [stdout]   |      ----------- variants in this enum
[INFO] [stdout] 4 |     CircleArea(f64),
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 5 |     RectangleArea(f64, f64),
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 6 |     TriangleArea(f64, f64),
[INFO] [stdout] 7 |     Perimeter(Vec<f64>),
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Monday`, `Tuesday`, `Wednesday`, `Thursday`, `Friday`, and `Saturday` are never constructed
[INFO] [stdout]  --> src/bin/enums.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum Days {
[INFO] [stdout]   |      ---- variants in this enum
[INFO] [stdout] 3 |     Monday,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 4 |     Tuesday,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 5 |     Wednesday,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 6 |     Thursday,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 7 |     Friday,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 8 |     Saturday,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Days` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Train` is never constructed
[INFO] [stdout]   --> src/bin/enums.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | enum TravelType {
[INFO] [stdout]    |      ---------- variant in this enum
[INFO] [stdout] 13 |     Car(f32),
[INFO] [stdout] 14 |     Train(f32),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `double` is never used
[INFO] [stdout]   --> src/bin/functionTask.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn double(x: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `triple` is never used
[INFO] [stdout]   --> src/bin/functionTask.rs:36:4
[INFO] [stdout]    |
[INFO] [stdout] 36 | fn triple(x: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Magazine` is never constructed
[INFO] [stdout]   --> src/bin/structTask.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | enum ItemType {
[INFO] [stdout]    |      -------- variant in this enum
[INFO] [stdout] 24 |     Book,
[INFO] [stdout] 25 |     Magazine,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ItemType` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id`, `title`, `year`, and `type_of_book` are never read
[INFO] [stdout]   --> src/bin/structTask.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct Item {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 30 |     id: u32,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 31 |     title: String,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 32 |     year: u32,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 33 |     type_of_book: ItemType,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Item` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `grade` is never read
[INFO] [stdout]   --> src/bin/conditionals.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let mut grade: char = 'F';
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `grade` is never read
[INFO] [stdout]   --> src/bin/conditionals.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     grade = if marks >= 90 {
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `Point_2D` should have an upper camel case name
[INFO] [stdout]   --> src/bin/struct.rs:57:12
[INFO] [stdout]    |
[INFO] [stdout] 57 |     struct Point_2D(i32, i32);
[INFO] [stdout]    |            ^^^^^^^^ help: convert the identifier to upper camel case: `Point2d`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `Point_3D` should have an upper camel case name
[INFO] [stdout]   --> src/bin/struct.rs:58:12
[INFO] [stdout]    |
[INFO] [stdout] 58 |     struct Point_3D(i32, i32, i32);
[INFO] [stdout]    |            ^^^^^^^^ help: convert the identifier to upper camel case: `Point3d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `extracted_owner`
[INFO] [stdout]   --> src/bin/struct.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let extracted_owner: String = my_car.owner.clone(); // fix use .clone() or  &String = &my_car.owner
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_extracted_owner`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `point_2D`
[INFO] [stdout]   --> src/bin/struct.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let point_2D = (1, 3);
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_point_2D`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `point_3D`
[INFO] [stdout]   --> src/bin/struct.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |     let point_3D = (12, 33, 12);
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_point_3D`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `point`
[INFO] [stdout]   --> src/bin/struct.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |     let point = Point_2D(1, 3);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_point`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `point`
[INFO] [stdout]   --> src/bin/struct.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |     let point = Point_3D(2, 33, 12);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_point`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_owner`
[INFO] [stdout]   --> src/bin/struct.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let new_owner = my_car.sell();
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_owner`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `monthly_insurance` and `selling_price` are never used
[INFO] [stdout]   --> src/bin/struct.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout]  8 | impl Car {
[INFO] [stdout]    | -------- associated items in this implementation
[INFO] [stdout]  9 |     // Associates functions
[INFO] [stdout] 10 |     fn monthly_insurance() -> u32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 14 |     fn selling_price(&self) -> u32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/bin/struct.rs:57:21
[INFO] [stdout]    |
[INFO] [stdout] 57 |     struct Point_2D(i32, i32);
[INFO] [stdout]    |            -------- ^^^  ^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            fields in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing these fields
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, and `2` are never read
[INFO] [stdout]   --> src/bin/struct.rs:58:21
[INFO] [stdout]    |
[INFO] [stdout] 58 |     struct Point_3D(i32, i32, i32);
[INFO] [stdout]    |            -------- ^^^  ^^^  ^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            fields in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing these fields
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ABC` is never constructed
[INFO] [stdout]   --> src/bin/struct.rs:64:12
[INFO] [stdout]    |
[INFO] [stdout] 64 |     struct ABC;
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hash::Hash`
[INFO] [stdout]  --> src/bin/hashMaps.rs:1:33
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::HashMap, hash::Hash, vec};
[INFO] [stdout]   |                                 ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `point_2D` should have a snake case name
[INFO] [stdout]   --> src/bin/struct.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let point_2D = (1, 3);
[INFO] [stdout]    |         ^^^^^^^^ help: convert the identifier to snake case: `point_2_d`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `point_3D` should have a snake case name
[INFO] [stdout]   --> src/bin/struct.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |     let point_3D = (12, 33, 12);
[INFO] [stdout]    |         ^^^^^^^^ help: convert the identifier to snake case: `point_3_d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/hashMapsTask.rs:70:5
[INFO] [stdout]    |
[INFO] [stdout] 70 | /     student_database.add_student(Student {
[INFO] [stdout] 71 | |         id: 1,
[INFO] [stdout] 72 | |         name: String::from("Victor"),
[INFO] [stdout] 73 | |         grade: 'A',
[INFO] [stdout] 74 | |     });
[INFO] [stdout]    | |______^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 70 |     let _ = student_database.add_student(Student {
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/bin/var.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let a: i32 = 5; // signed 32-bit integer
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]  --> src/bin/var.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let b: u32 = 5; // unsigned 32-bit integer
[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/bin/var.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let c: i64 = 5; // signed 64-bit integer
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d`
[INFO] [stdout]  --> src/bin/var.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let d: u64 = 5; // unsigned 64-bit integer
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]  --> src/bin/var.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let e: f32 = 5.0; // 32-bit floating point
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]  --> src/bin/var.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let f: f64 = 5.0; // 64-bit floating point
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `g`
[INFO] [stdout]  --> src/bin/var.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let g: bool = true; // boolean
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_g`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `h`
[INFO] [stdout]   --> src/bin/var.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let h: char = 'a'; // character
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_h`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/bin/var.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let i: &str = "Hello, World!"; // string slice
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/bin/var.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let j: String = String::from("Hello, World!"); // string
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]   --> src/bin/var.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let k: [i32; 5] = [1, 2, 3, 4, 5]; // array
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `l`
[INFO] [stdout]   --> src/bin/var.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let l: (i32, f64, u8) = (500, 6.4, 1); // tuple
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_l`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `h`
[INFO] [stdout]   --> src/bin/var.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let h: Vec<i32> = Vec::new(); // vector
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_h`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/bin/var.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let n: Option<i32> = Some(5); // option
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `o`
[INFO] [stdout]   --> src/bin/var.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let o: Result<i32, i32> = Ok(5); // result
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_o`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> src/bin/var.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let p: Box<i32> = Box::new(5); // box
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::primitive`
[INFO] [stdout]  --> src/bin/optionAndResult.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::primitive;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.63s
[INFO] running `Command { std: "docker" "inspect" "b538df3aee4f395739c288bc6617a80478b80749dfe496e376bd17fa157ac6b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b538df3aee4f395739c288bc6617a80478b80749dfe496e376bd17fa157ac6b3", kill_on_drop: false }`
[INFO] [stdout] b538df3aee4f395739c288bc6617a80478b80749dfe496e376bd17fa157ac6b3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 99588c1e717c8d4c5ca4b81cd91f09c675abdd7187a88b8c32531cb3e481175f
[INFO] running `Command { std: "docker" "start" "-a" "99588c1e717c8d4c5ca4b81cd91f09c675abdd7187a88b8c32531cb3e481175f", kill_on_drop: false }`
[INFO] [stdout] warning: fields `id`, `name`, and `email` are never read
[INFO] [stdout]   --> src/lib.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub struct Customer {
[INFO] [stdout]    |                -------- fields in this struct
[INFO] [stdout] 58 |         id: u64,
[INFO] [stdout]    |         ^^
[INFO] [stdout] 59 |         name: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 60 |         email: String,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id` and `customer` are never read
[INFO] [stdout]   --> src/lib.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 73 |     pub struct Order {
[INFO] [stdout]    |                ----- fields in this struct
[INFO] [stdout] 74 |         id: u64,
[INFO] [stdout]    |         ^^
[INFO] [stdout] 75 |         product: Product,
[INFO] [stdout] 76 |         customer: Customer,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling learn_rust999999911111999 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variants `Monday`, `Tuesday`, `Wednesday`, `Thursday`, `Friday`, and `Saturday` are never constructed
[INFO] [stdout]  --> src/bin/enums.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum Days {
[INFO] [stdout]   |      ---- variants in this enum
[INFO] [stdout] 3 |     Monday,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 4 |     Tuesday,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 5 |     Wednesday,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 6 |     Thursday,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 7 |     Friday,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 8 |     Saturday,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Days` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Train` is never constructed
[INFO] [stdout]   --> src/bin/enums.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | enum TravelType {
[INFO] [stdout]    |      ---------- variant in this enum
[INFO] [stdout] 13 |     Car(f32),
[INFO] [stdout] 14 |     Train(f32),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hash::Hash`
[INFO] [stdout]  --> src/bin/hashMaps.rs:1:33
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::HashMap, hash::Hash, vec};
[INFO] [stdout]   |                                 ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::primitive`
[INFO] [stdout]  --> src/bin/optionAndResult.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::primitive;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `CircleArea`, `RectangleArea`, and `Perimeter` are never constructed
[INFO] [stdout]  --> src/bin/optionTask.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | enum Measurement {
[INFO] [stdout]   |      ----------- variants in this enum
[INFO] [stdout] 4 |     CircleArea(f64),
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 5 |     RectangleArea(f64, f64),
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 6 |     TriangleArea(f64, f64),
[INFO] [stdout] 7 |     Perimeter(Vec<f64>),
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Magazine` is never constructed
[INFO] [stdout]   --> src/bin/structTask.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | enum ItemType {
[INFO] [stdout]    |      -------- variant in this enum
[INFO] [stdout] 24 |     Book,
[INFO] [stdout] 25 |     Magazine,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ItemType` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id`, `title`, `year`, and `type_of_book` are never read
[INFO] [stdout]   --> src/bin/structTask.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct Item {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 30 |     id: u32,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 31 |     title: String,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 32 |     year: u32,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 33 |     type_of_book: ItemType,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Item` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/hashMapsTask.rs:70:5
[INFO] [stdout]    |
[INFO] [stdout] 70 | /     student_database.add_student(Student {
[INFO] [stdout] 71 | |         id: 1,
[INFO] [stdout] 72 | |         name: String::from("Victor"),
[INFO] [stdout] 73 | |         grade: 'A',
[INFO] [stdout] 74 | |     });
[INFO] [stdout]    | |______^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 70 |     let _ = student_database.add_student(Student {
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `grade` is never read
[INFO] [stdout]   --> src/bin/conditionals.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let mut grade: char = 'F';
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `grade` is never read
[INFO] [stdout]   --> src/bin/conditionals.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     grade = if marks >= 90 {
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `double` is never used
[INFO] [stdout]   --> src/bin/functionTask.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn double(x: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `triple` is never used
[INFO] [stdout]   --> src/bin/functionTask.rs:36:4
[INFO] [stdout]    |
[INFO] [stdout] 36 | fn triple(x: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `Point_2D` should have an upper camel case name
[INFO] [stdout]   --> src/bin/struct.rs:57:12
[INFO] [stdout]    |
[INFO] [stdout] 57 |     struct Point_2D(i32, i32);
[INFO] [stdout]    |            ^^^^^^^^ help: convert the identifier to upper camel case: `Point2d`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `Point_3D` should have an upper camel case name
[INFO] [stdout]   --> src/bin/struct.rs:58:12
[INFO] [stdout]    |
[INFO] [stdout] 58 |     struct Point_3D(i32, i32, i32);
[INFO] [stdout]    |            ^^^^^^^^ help: convert the identifier to upper camel case: `Point3d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `extracted_owner`
[INFO] [stdout]   --> src/bin/struct.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let extracted_owner: String = my_car.owner.clone(); // fix use .clone() or  &String = &my_car.owner
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_extracted_owner`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `point_2D`
[INFO] [stdout]   --> src/bin/struct.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let point_2D = (1, 3);
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_point_2D`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `point_3D`
[INFO] [stdout]   --> src/bin/struct.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |     let point_3D = (12, 33, 12);
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_point_3D`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `point`
[INFO] [stdout]   --> src/bin/struct.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |     let point = Point_2D(1, 3);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_point`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `point`
[INFO] [stdout]   --> src/bin/struct.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |     let point = Point_3D(2, 33, 12);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_point`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_owner`
[INFO] [stdout]   --> src/bin/struct.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let new_owner = my_car.sell();
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_owner`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `monthly_insurance` and `selling_price` are never used
[INFO] [stdout]   --> src/bin/struct.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout]  8 | impl Car {
[INFO] [stdout]    | -------- associated items in this implementation
[INFO] [stdout]  9 |     // Associates functions
[INFO] [stdout] 10 |     fn monthly_insurance() -> u32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 14 |     fn selling_price(&self) -> u32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `point_2D` should have a snake case name
[INFO] [stdout]   --> src/bin/struct.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let point_2D = (1, 3);
[INFO] [stdout]    |         ^^^^^^^^ help: convert the identifier to snake case: `point_2_d`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `point_3D` should have a snake case name
[INFO] [stdout]   --> src/bin/struct.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |     let point_3D = (12, 33, 12);
[INFO] [stdout]    |         ^^^^^^^^ help: convert the identifier to snake case: `point_3_d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/bin/var.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let a: i32 = 5; // signed 32-bit integer
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]  --> src/bin/var.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let b: u32 = 5; // unsigned 32-bit integer
[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/bin/var.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let c: i64 = 5; // signed 64-bit integer
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d`
[INFO] [stdout]  --> src/bin/var.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let d: u64 = 5; // unsigned 64-bit integer
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]  --> src/bin/var.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let e: f32 = 5.0; // 32-bit floating point
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]  --> src/bin/var.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let f: f64 = 5.0; // 64-bit floating point
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `g`
[INFO] [stdout]  --> src/bin/var.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let g: bool = true; // boolean
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_g`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `h`
[INFO] [stdout]   --> src/bin/var.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let h: char = 'a'; // character
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_h`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/bin/var.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let i: &str = "Hello, World!"; // string slice
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/bin/var.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let j: String = String::from("Hello, World!"); // string
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]   --> src/bin/var.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let k: [i32; 5] = [1, 2, 3, 4, 5]; // array
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `l`
[INFO] [stdout]   --> src/bin/var.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let l: (i32, f64, u8) = (500, 6.4, 1); // tuple
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_l`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `h`
[INFO] [stdout]   --> src/bin/var.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let h: Vec<i32> = Vec::new(); // vector
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_h`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/bin/var.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let n: Option<i32> = Some(5); // option
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `o`
[INFO] [stdout]   --> src/bin/var.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let o: Result<i32, i32> = Ok(5); // result
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_o`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> src/bin/var.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let p: Box<i32> = Box::new(5); // box
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id`, `name`, and `email` are never read
[INFO] [stdout]   --> src/lib.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub struct Customer {
[INFO] [stdout]    |                -------- fields in this struct
[INFO] [stdout] 58 |         id: u64,
[INFO] [stdout]    |         ^^
[INFO] [stdout] 59 |         name: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 60 |         email: String,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id` and `customer` are never read
[INFO] [stdout]   --> src/lib.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 73 |     pub struct Order {
[INFO] [stdout]    |                ----- fields in this struct
[INFO] [stdout] 74 |         id: u64,
[INFO] [stdout]    |         ^^
[INFO] [stdout] 75 |         product: Product,
[INFO] [stdout] 76 |         customer: Customer,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.80s
[INFO] running `Command { std: "docker" "inspect" "99588c1e717c8d4c5ca4b81cd91f09c675abdd7187a88b8c32531cb3e481175f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99588c1e717c8d4c5ca4b81cd91f09c675abdd7187a88b8c32531cb3e481175f", kill_on_drop: false }`
[INFO] [stdout] 99588c1e717c8d4c5ca4b81cd91f09c675abdd7187a88b8c32531cb3e481175f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b975602fac3678532253112b522f155b8d2a431723f38b34897354c0336fda6b
[INFO] running `Command { std: "docker" "start" "-a" "b975602fac3678532253112b522f155b8d2a431723f38b34897354c0336fda6b", kill_on_drop: false }`
[INFO] [stderr] warning: fields `id`, `name`, and `email` are never read
[INFO] [stderr]   --> src/lib.rs:58:9
[INFO] [stderr]    |
[INFO] [stderr] 57 |     pub struct Customer {
[INFO] [stderr]    |                -------- fields in this struct
[INFO] [stderr] 58 |         id: u64,
[INFO] [stderr]    |         ^^
[INFO] [stderr] 59 |         name: String,
[INFO] [stderr]    |         ^^^^
[INFO] [stderr] 60 |         email: String,
[INFO] [stderr]    |         ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: fields `id` and `customer` are never read
[INFO] [stderr]   --> src/lib.rs:74:9
[INFO] [stderr]    |
[INFO] [stderr] 73 |     pub struct Order {
[INFO] [stderr]    |                ----- fields in this struct
[INFO] [stderr] 74 |         id: u64,
[INFO] [stderr]    |         ^^
[INFO] [stderr] 75 |         product: Product,
[INFO] [stderr] 76 |         customer: Customer,
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `learn_rust999999911111999` (lib) generated 2 warnings
[INFO] [stderr] warning: value assigned to `grade` is never read
[INFO] [stderr]   --> src/bin/conditionals.rs:11:13
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let mut grade: char = 'F';
[INFO] [stderr]    |             ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `grade` is never read
[INFO] [stderr]   --> src/bin/conditionals.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     grade = if marks >= 90 {
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variant `Magazine` is never constructed
[INFO] [stderr]   --> src/bin/structTask.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 23 | enum ItemType {
[INFO] [stderr]    |      -------- variant in this enum
[INFO] [stderr] 24 |     Book,
[INFO] [stderr] 25 |     Magazine,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `ItemType` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: fields `id`, `title`, `year`, and `type_of_book` are never read
[INFO] [stderr]   --> src/bin/structTask.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 29 | struct Item {
[INFO] [stderr]    |        ---- fields in this struct
[INFO] [stderr] 30 |     id: u32,
[INFO] [stderr]    |     ^^
[INFO] [stderr] 31 |     title: String,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 32 |     year: u32,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 33 |     type_of_book: ItemType,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Item` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: `learn_rust999999911111999` (bin "conditionals" test) generated 2 warnings
[INFO] [stderr] warning: `learn_rust999999911111999` (bin "structTask" test) generated 2 warnings
[INFO] [stderr] warning: variants `Monday`, `Tuesday`, `Wednesday`, `Thursday`, `Friday`, and `Saturday` are never constructed
[INFO] [stderr]  --> src/bin/enums.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | enum Days {
[INFO] [stderr]   |      ---- variants in this enum
[INFO] [stderr] 3 |     Monday,
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr] 4 |     Tuesday,
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 5 |     Wednesday,
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr] 6 |     Thursday,
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 7 |     Friday,
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr] 8 |     Saturday,
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `Days` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant `Train` is never constructed
[INFO] [stderr]   --> src/bin/enums.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | enum TravelType {
[INFO] [stderr]    |      ---------- variant in this enum
[INFO] [stderr] 13 |     Car(f32),
[INFO] [stderr] 14 |     Train(f32),
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/bin/hashMapsTask.rs:70:5
[INFO] [stderr]    |
[INFO] [stderr] 70 | /     student_database.add_student(Student {
[INFO] [stderr] 71 | |         id: 1,
[INFO] [stderr] 72 | |         name: String::from("Victor"),
[INFO] [stderr] 73 | |         grade: 'A',
[INFO] [stderr] 74 | |     });
[INFO] [stderr]    | |______^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 70 |     let _ = student_database.add_student(Student {
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: type `Point_2D` should have an upper camel case name
[INFO] [stderr]   --> src/bin/struct.rs:57:12
[INFO] [stderr]    |
[INFO] [stderr] 57 |     struct Point_2D(i32, i32);
[INFO] [stderr]    |            ^^^^^^^^ help: convert the identifier to upper camel case: `Point2d`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_camel_case_types)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `Point_3D` should have an upper camel case name
[INFO] [stderr]   --> src/bin/struct.rs:58:12
[INFO] [stderr]    |
[INFO] [stderr] 58 |     struct Point_3D(i32, i32, i32);
[INFO] [stderr]    |            ^^^^^^^^ help: convert the identifier to upper camel case: `Point3d`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `extracted_owner`
[INFO] [stderr]   --> src/bin/struct.rs:51:9
[INFO] [stderr]    |
[INFO] [stderr] 51 |     let extracted_owner: String = my_car.owner.clone(); // fix use .clone() or  &String = &my_car.owner
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_extracted_owner`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `point_2D`
[INFO] [stderr]   --> src/bin/struct.rs:54:9
[INFO] [stderr]    |
[INFO] [stderr] 54 |     let point_2D = (1, 3);
[INFO] [stderr]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_point_2D`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `point_3D`
[INFO] [stderr]   --> src/bin/struct.rs:55:9
[INFO] [stderr]    |
[INFO] [stderr] 55 |     let point_3D = (12, 33, 12);
[INFO] [stderr]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_point_3D`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `point`
[INFO] [stderr]   --> src/bin/struct.rs:60:9
[INFO] [stderr]    |
[INFO] [stderr] 60 |     let point = Point_2D(1, 3);
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_point`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `point`
[INFO] [stderr]   --> src/bin/struct.rs:61:9
[INFO] [stderr]    |
[INFO] [stderr] 61 |     let point = Point_3D(2, 33, 12);
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_point`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `new_owner`
[INFO] [stderr]   --> src/bin/struct.rs:69:9
[INFO] [stderr]    |
[INFO] [stderr] 69 |     let new_owner = my_car.sell();
[INFO] [stderr]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_owner`
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `monthly_insurance` and `selling_price` are never used
[INFO] [stderr]   --> src/bin/struct.rs:10:8
[INFO] [stderr]    |
[INFO] [stderr]  8 | impl Car {
[INFO] [stderr]    | -------- associated items in this implementation
[INFO] [stderr]  9 |     // Associates functions
[INFO] [stderr] 10 |     fn monthly_insurance() -> u32 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 14 |     fn selling_price(&self) -> u32 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `point_2D` should have a snake case name
[INFO] [stderr]   --> src/bin/struct.rs:54:9
[INFO] [stderr]    |
[INFO] [stderr] 54 |     let point_2D = (1, 3);
[INFO] [stderr]    |         ^^^^^^^^ help: convert the identifier to snake case: `point_2_d`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `point_3D` should have a snake case name
[INFO] [stderr]   --> src/bin/struct.rs:55:9
[INFO] [stderr]    |
[INFO] [stderr] 55 |     let point_3D = (12, 33, 12);
[INFO] [stderr]    |         ^^^^^^^^ help: convert the identifier to snake case: `point_3_d`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]  --> src/bin/var.rs:3:9
[INFO] [stderr]   |
[INFO] [stderr] 3 |     let a: i32 = 5; // signed 32-bit integer
[INFO] [stderr]   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]  --> src/bin/var.rs:4:9
[INFO] [stderr]   |
[INFO] [stderr] 4 |     let b: u32 = 5; // unsigned 32-bit integer
[INFO] [stderr]   |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]  --> src/bin/var.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let c: i64 = 5; // signed 64-bit integer
[INFO] [stderr]   |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d`
[INFO] [stderr]  --> src/bin/var.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let d: u64 = 5; // unsigned 64-bit integer
[INFO] [stderr]   |         ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]  --> src/bin/var.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let e: f32 = 5.0; // 32-bit floating point
[INFO] [stderr]   |         ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]  --> src/bin/var.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let f: f64 = 5.0; // 64-bit floating point
[INFO] [stderr]   |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `g`
[INFO] [stderr]  --> src/bin/var.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let g: bool = true; // boolean
[INFO] [stderr]   |         ^ help: if this is intentional, prefix it with an underscore: `_g`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `h`
[INFO] [stderr]   --> src/bin/var.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let h: char = 'a'; // character
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_h`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/bin/var.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 |     let i: &str = "Hello, World!"; // string slice
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `j`
[INFO] [stderr]   --> src/bin/var.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |     let j: String = String::from("Hello, World!"); // string
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `k`
[INFO] [stderr]   --> src/bin/var.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 |     let k: [i32; 5] = [1, 2, 3, 4, 5]; // array
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `l`
[INFO] [stderr]   --> src/bin/var.rs:16:9
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let l: (i32, f64, u8) = (500, 6.4, 1); // tuple
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_l`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `h`
[INFO] [stderr]   --> src/bin/var.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let h: Vec<i32> = Vec::new(); // vector
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_h`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]   --> src/bin/var.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |     let n: Option<i32> = Some(5); // option
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `o`
[INFO] [stderr]   --> src/bin/var.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let o: Result<i32, i32> = Ok(5); // result
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_o`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `p`
[INFO] [stderr]   --> src/bin/var.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |     let p: Box<i32> = Box::new(5); // box
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `hash::Hash`
[INFO] [stderr]  --> src/bin/hashMaps.rs:1:33
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::{collections::HashMap, hash::Hash, vec};
[INFO] [stderr]   |                                 ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `learn_rust999999911111999` (bin "enums" test) generated 2 warnings
[INFO] [stderr] warning: `learn_rust999999911111999` (bin "hashMapsTask" test) generated 1 warning
[INFO] [stderr] warning: `learn_rust999999911111999` (bin "struct" test) generated 11 warnings
[INFO] [stderr] warning: `learn_rust999999911111999` (bin "var" test) generated 16 warnings
[INFO] [stderr] warning: `learn_rust999999911111999` (bin "hashMaps" test) generated 1 warning (run `cargo fix --bin "hashMaps" --tests` to apply 1 suggestion)
[INFO] [stderr] warning: variants `CircleArea`, `RectangleArea`, and `Perimeter` are never constructed
[INFO] [stderr]  --> src/bin/optionTask.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | enum Measurement {
[INFO] [stderr]   |      ----------- variants in this enum
[INFO] [stderr] 4 |     CircleArea(f64),
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr] 5 |     RectangleArea(f64, f64),
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 6 |     TriangleArea(f64, f64),
[INFO] [stderr] 7 |     Perimeter(Vec<f64>),
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `double` is never used
[INFO] [stderr]   --> src/bin/functionTask.rs:32:4
[INFO] [stderr]    |
[INFO] [stderr] 32 | fn double(x: i32) -> i32 {
[INFO] [stderr]    |    ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `triple` is never used
[INFO] [stderr]   --> src/bin/functionTask.rs:36:4
[INFO] [stderr]    |
[INFO] [stderr] 36 | fn triple(x: i32) -> i32 {
[INFO] [stderr]    |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::primitive`
[INFO] [stderr]  --> src/bin/optionAndResult.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::primitive;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `learn_rust999999911111999` (bin "optionTask" test) generated 1 warning
[INFO] [stderr] warning: `learn_rust999999911111999` (bin "functionTask" test) generated 2 warnings
[INFO] [stderr] warning: `learn_rust999999911111999` (bin "optionAndResult" test) generated 1 warning (run `cargo fix --bin "optionAndResult" --tests` to apply 1 suggestion)
[INFO] [stderr] warning: `learn_rust999999911111999` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/learn_rust999999911111999-7100518a71fbe6cf)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/conditionals.rs (/opt/rustwide/target/debug/deps/conditionals-451f8afccfd892d4)
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running unittests src/bin/conditionalsTask.rs (/opt/rustwide/target/debug/deps/conditionalsTask-b0df3e88ef1ba86e)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/enums.rs (/opt/rustwide/target/debug/deps/enums-5adc9106cad6183f)
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/functionTask.rs (/opt/rustwide/target/debug/deps/functionTask-a5f89ccb5f05fe38)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/functions.rs (/opt/rustwide/target/debug/deps/functions-09d6b69e2ed29a75)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/hashMaps.rs (/opt/rustwide/target/debug/deps/hashMaps-567f6e0de2eaf92e)
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/hashMapsTask.rs (/opt/rustwide/target/debug/deps/hashMapsTask-5363f8625a94c06b)
[INFO] [stderr]      Running unittests src/bin/loop.rs (/opt/rustwide/target/debug/deps/loop-930d2d35f89a8918)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/main.rs (/opt/rustwide/target/debug/deps/main-fd177d07f7779c19)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/optionAndResult.rs (/opt/rustwide/target/debug/deps/optionAndResult-32d555071476f05f)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/optionTask.rs (/opt/rustwide/target/debug/deps/optionTask-7afc8a204e4c31c5)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/struct.rs (/opt/rustwide/target/debug/deps/struct-e70d15bf4fa5f71c)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/structTask.rs (/opt/rustwide/target/debug/deps/structTask-88f6e44d0979dbcd)
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]      Running unittests src/bin/var.rs (/opt/rustwide/target/debug/deps/var-a457e9d1c2e61fa4)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests learn_rust999999911111999
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - product::Product::new (line 22) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.31s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b975602fac3678532253112b522f155b8d2a431723f38b34897354c0336fda6b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b975602fac3678532253112b522f155b8d2a431723f38b34897354c0336fda6b", kill_on_drop: false }`
[INFO] [stdout] b975602fac3678532253112b522f155b8d2a431723f38b34897354c0336fda6b