[INFO] cloning repository https://github.com/pahlavaubivca/rust_hello_world
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pahlavaubivca/rust_hello_world" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpahlavaubivca%2Frust_hello_world", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpahlavaubivca%2Frust_hello_world'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4390d6090c9404481aafb3a0f0541c780daa2793
[INFO] testing pahlavaubivca/rust_hello_world against beta-2026-03-05 for beta-1.95-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpahlavaubivca%2Frust_hello_world" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/pahlavaubivca/rust_hello_world
[INFO] finished tweaking git repo https://github.com/pahlavaubivca/rust_hello_world
[INFO] tweaked toml for git repo https://github.com/pahlavaubivca/rust_hello_world written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/pahlavaubivca/rust_hello_world on toolchain beta-2026-03-05
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-03-05" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/pahlavaubivca/rust_hello_world already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-03-05" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7557c66b82909ea1cace57222f3977f8010146c2f538a4ce85328d549909fd25
[INFO] running `Command { std: "docker" "start" "-a" "7557c66b82909ea1cace57222f3977f8010146c2f538a4ce85328d549909fd25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7557c66b82909ea1cace57222f3977f8010146c2f538a4ce85328d549909fd25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7557c66b82909ea1cace57222f3977f8010146c2f538a4ce85328d549909fd25", kill_on_drop: false }`
[INFO] [stdout] 7557c66b82909ea1cace57222f3977f8010146c2f538a4ce85328d549909fd25
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d4fb2f237cec9db9b4835372d68f78bebc67fa10556e8ab99a58d5545feae734
[INFO] running `Command { std: "docker" "start" "-a" "d4fb2f237cec9db9b4835372d68f78bebc67fa10556e8ab99a58d5545feae734", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.150
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling log v0.4.20
[INFO] [stderr]    Compiling getrandom v0.2.11
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling hello-world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Stdio`
[INFO] [stdout]  --> src/main.rs:3:29
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::process::{Command, Stdio};
[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: `crate::borrow::borrow_checker`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crate::borrow::borrow_checker;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::ownership::example_ownership`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use crate::ownership::example_ownership;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::references_with_lifetime::rwl`
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use crate::references_with_lifetime::rwl;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Cons` and `Nil`
[INFO] [stdout]  --> src/main.rs:9:36
[INFO] [stdout]   |
[INFO] [stdout] 9 | use crate::pointers::r#box::List::{Cons, Nil};
[INFO] [stdout]   |                                    ^^^^  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Cons as RcCons` and `Nil as RcNil`
[INFO] [stdout]   --> src/main.rs:10:37
[INFO] [stdout]    |
[INFO] [stdout] 10 | use crate::pointers::r#rc::RcList::{Cons as RcCons, Nil as RcNil};
[INFO] [stdout]    |                                     ^^^^^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ll_proto_1_1` and `ll_proto_1`
[INFO] [stdout]   --> src/main.rs:11:49
[INFO] [stdout]    |
[INFO] [stdout] 11 | use crate::training::linked_list::prototype_1::{ll_proto_1, ll_proto_1_1};
[INFO] [stdout]    |                                                 ^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::training::linked_list::prototype_2::ll_proto_2`
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use crate::training::linked_list::prototype_2::ll_proto_2;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::Display`
[INFO] [stdout]  --> src/basic_variable_and_types.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::Display;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::env::SplitPaths`
[INFO] [stdout]  --> src/generic.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::env::SplitPaths;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]  --> src/pointers/box.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ops::Deref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `RefMut`
[INFO] [stdout]  --> src/training/linked_list/prototype_1.rs:1:26
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cell::{RefCell, RefMut};
[INFO] [stdout]   |                          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `DerefMut` and `Deref`
[INFO] [stdout]  --> src/training/linked_list/prototype_2.rs:2:16
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::ops::{Deref, DerefMut};
[INFO] [stdout]   |                ^^^^^  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::training::linked_list::prototype_1::Node`
[INFO] [stdout]  --> src/training/linked_list/prototype_2.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::training::linked_list::prototype_1::Node;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `log::info`
[INFO] [stdout]  --> src/training/sum_2_nums/sum_2_nums.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use log::info;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/main.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 54 |     return;
[INFO] [stdout]    |     ------ any code following this expression is unreachable
[INFO] [stdout] 55 |     let fifo_path = "/tmp/xterm_fifo";
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `asd`
[INFO] [stdout]  --> src/basic_variable_and_types.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let asd = 89;
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_asd`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `asd`
[INFO] [stdout]   --> src/basic_variable_and_types.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |         let asd = asd.to_string();
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_asd`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `asd` is assigned to, but never used
[INFO] [stdout]   --> src/basic_variable_and_types.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let mut asd = 89;
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_asd` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `asd` is never read
[INFO] [stdout]   --> src/basic_variable_and_types.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     asd = 4;
[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: unused variable: `num`
[INFO] [stdout]   --> src/basic_variable_and_types.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let num: i32 = str_number.parse().expect("");
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_num`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `qwe`
[INFO] [stdout]   --> src/basic_variable_and_types.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let qwe = if asd == 1 { -1 } else { 0 };
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_qwe`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]   --> src/basic_variable_and_types.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let result = loop {
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/ownership.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let b = a.clone();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/ownership.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let b = a.clone();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `asd`
[INFO] [stdout]   --> src/struct.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let asd = vec![1,2,3];
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_asd`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/trait.rs:59:30
[INFO] [stdout]    |
[INFO] [stdout] 59 | pub fn notify_multiple_trait(item: &(impl Summary + Display)) {}
[INFO] [stdout]    |                              ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/trait.rs:61:60
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub fn notify_multiple_trait_generic<T: Summary + Display>(item: &T) {}
[INFO] [stdout]    |                                                            ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/trait.rs:64:34
[INFO] [stdout]    |
[INFO] [stdout] 64 | pub fn notify_mtg_alternative<T>(item: &T)
[INFO] [stdout]    |                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str1`
[INFO] [stdout]   --> src/references_with_lifetime.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let str1 = String::from("long string");
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_str1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str2`
[INFO] [stdout]   --> src/references_with_lifetime.rs:36:13
[INFO] [stdout]    |
[INFO] [stdout] 36 |         let str2 = String::from("shrt str");
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_str2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/references_with_lifetime.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let i = ImportantExcerpt {//hold ref to the first sentence of the String owned by `novel` variable.
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/references_with_lifetime.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |     let s: &'static str = "static lifetime 🙄";
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/pointers/rc.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let b = RcList::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/pointers/rc.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let c = RcList::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: `list`
[INFO] [stdout]   --> src/pointers/box.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let list = Cons(1,
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_list`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/pointers/drop_trait.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let c = CustomSmartPointer {
[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/pointers/drop_trait.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let d = CustomSmartPointer {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]   --> src/training/linked_list/prototype_2.rs:75:30
[INFO] [stdout]    |
[INFO] [stdout] 75 |     pub fn remove(&mut self, index: usize) {}
[INFO] [stdout]    |                              ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example_of_shadowing` is never used
[INFO] [stdout]  --> src/basic_variable_and_types.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn example_of_shadowing() {
[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 `example_of_mut` is never used
[INFO] [stdout]   --> src/basic_variable_and_types.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn example_of_mut() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example_of_converting_from_string` is never used
[INFO] [stdout]   --> src/basic_variable_and_types.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub fn example_of_converting_from_string() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example_of_assigning` is never used
[INFO] [stdout]   --> src/basic_variable_and_types.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn example_of_assigning() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example_of_loop` is never used
[INFO] [stdout]   --> src/basic_variable_and_types.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub fn example_of_loop() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `loop_through_collection` is never used
[INFO] [stdout]   --> src/basic_variable_and_types.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub fn loop_through_collection() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example_ownership` is never used
[INFO] [stdout]   --> src/ownership.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub fn example_ownership() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example_ownership_clone` is never used
[INFO] [stdout]   --> src/ownership.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub fn example_ownership_clone() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Some` is never constructed
[INFO] [stdout]   --> src/ownership.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | struct Some {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `display` is never used
[INFO] [stdout]   --> src/ownership.rs:38:12
[INFO] [stdout]    |
[INFO] [stdout] 37 | impl Some {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] 38 |     pub fn display(&self) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `borrow_checker` is never used
[INFO] [stdout]  --> src/borrow.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn borrow_checker() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `slice` is never used
[INFO] [stdout]  --> src/slice.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn slice() {}
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_word_index_of_end` is never used
[INFO] [stdout]  --> src/slice.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn first_word_index_of_end(s: &String) -> usize {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `string_slices` is never used
[INFO] [stdout]   --> src/slice.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn string_slices(s: &String) -> &str {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]  --> src/struct.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Rectangle {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `work_with_struct` is never used
[INFO] [stdout]  --> src/struct.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn work_with_struct() {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `largest` is never used
[INFO] [stdout]  --> src/generic.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn largest<T: PartialOrd>(list: &[T]) -> &T {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `generic_example_run` is never used
[INFO] [stdout]   --> src/generic.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn generic_example_run() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]   --> src/generic.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | struct Point<T> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `x` is never used
[INFO] [stdout]   --> src/generic.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl<T> Point<T> {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] 28 |     fn x(&self) -> &T {
[INFO] [stdout]    |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example_of_use_point` is never used
[INFO] [stdout]   --> src/generic.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn example_of_use_point() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Summary` is never used
[INFO] [stdout]  --> src/trait.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub trait Summary {
[INFO] [stdout]   |           ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `NewsArticle` is never constructed
[INFO] [stdout]   --> src/trait.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct NewsArticle {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Tweet` is never constructed
[INFO] [stdout]   --> src/trait.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub struct Tweet {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify` is never used
[INFO] [stdout]   --> src/trait.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub fn notify(item: &impl Summary) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_bound_syntax` is never used
[INFO] [stdout]   --> src/trait.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub fn notify_bound_syntax<T: Summary>(item: &T) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_multiple_trait` is never used
[INFO] [stdout]   --> src/trait.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | pub fn notify_multiple_trait(item: &(impl Summary + Display)) {}
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_multiple_trait_generic` is never used
[INFO] [stdout]   --> src/trait.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub fn notify_multiple_trait_generic<T: Summary + Display>(item: &T) {}
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_mtg_alternative` is never used
[INFO] [stdout]   --> src/trait.rs:64:8
[INFO] [stdout]    |
[INFO] [stdout] 64 | pub fn notify_mtg_alternative<T>(item: &T)
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `returns_summarizable` is never used
[INFO] [stdout]   --> src/trait.rs:70:4
[INFO] [stdout]    |
[INFO] [stdout] 70 | fn returns_summarizable() -> impl Summary {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `S1` is never constructed
[INFO] [stdout]   --> src/trait.rs:82:8
[INFO] [stdout]    |
[INFO] [stdout] 82 | struct S1 {
[INFO] [stdout]    |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `S2` is never constructed
[INFO] [stdout]   --> src/trait.rs:86:8
[INFO] [stdout]    |
[INFO] [stdout] 86 | struct S2 {
[INFO] [stdout]    |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `S1S2Using` is never used
[INFO] [stdout]    --> src/trait.rs:102:4
[INFO] [stdout]     |
[INFO] [stdout] 102 | fn S1S2Using() -> Box<dyn Summary> {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]    --> src/trait.rs:119:8
[INFO] [stdout]     |
[INFO] [stdout] 119 | struct Pair<T> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/trait.rs:125:8
[INFO] [stdout]     |
[INFO] [stdout] 124 | impl<T> Pair<T> {
[INFO] [stdout]     | --------------- associated function in this implementation
[INFO] [stdout] 125 |     fn new(x: T, y: T) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `cmp_display` is never used
[INFO] [stdout]    --> src/trait.rs:133:8
[INFO] [stdout]     |
[INFO] [stdout] 132 | impl<T: Display + PartialOrd> Pair<T> {
[INFO] [stdout]     | ------------------------------------- method in this implementation
[INFO] [stdout] 133 |     fn cmp_display(&self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rwl` is never used
[INFO] [stdout]   --> src/references_with_lifetime.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub fn rwl<'a>(str1: &'a str, str2: &'a str) -> &'a str {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rwlResult` is never used
[INFO] [stdout]   --> src/references_with_lifetime.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub fn rwlResult() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ImportantExcerpt` is never constructed
[INFO] [stdout]   --> src/references_with_lifetime.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 43 | struct ImportantExcerpt<'a> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `asdf` is never used
[INFO] [stdout]   --> src/references_with_lifetime.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn asdf() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `static_lifetime` is never used
[INFO] [stdout]   --> src/references_with_lifetime.rs:59:4
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn static_lifetime() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest_with_an_announcement` is never used
[INFO] [stdout]   --> src/references_with_lifetime.rs:64:4
[INFO] [stdout]    |
[INFO] [stdout] 64 | fn longest_with_an_announcement<'a, T>(
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `e` is never used
[INFO] [stdout]   --> src/pointers/mod.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn e() {}
[INFO] [stdout]    |    ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `RcList` is never used
[INFO] [stdout]   --> src/pointers/rc.rs:16:10
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub enum RcList {
[INFO] [stdout]    |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rc_example` is never used
[INFO] [stdout]   --> src/pointers/rc.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn rc_example() {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List` is never used
[INFO] [stdout]   --> src/pointers/box.rs:16:10
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub enum List {
[INFO] [stdout]    |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `nested_list` is never used
[INFO] [stdout]   --> src/pointers/box.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn nested_list() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyBox` is never constructed
[INFO] [stdout]  --> src/pointers/defer_trait.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct MyBox<T>(T);
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> src/pointers/defer_trait.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | impl<T> MyBox<T> {
[INFO] [stdout]   | ---------------- associated function in this implementation
[INFO] [stdout] 7 |     fn new(x: T) -> MyBox<T> {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hello` is never used
[INFO] [stdout]   --> src/pointers/defer_trait.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn hello(name: &str) {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `deref_coercion_example` is never used
[INFO] [stdout]   --> src/pointers/defer_trait.rs:45:4
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn deref_coercion_example() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `no_deref_coercion_example` is never used
[INFO] [stdout]   --> src/pointers/defer_trait.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn no_deref_coercion_example() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CustomSmartPointer` is never constructed
[INFO] [stdout]  --> src/pointers/drop_trait.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct CustomSmartPointer {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `drop_usage_example` is never used
[INFO] [stdout]   --> src/pointers/drop_trait.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn drop_usage_example() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `drop_example` is never used
[INFO] [stdout]   --> src/pointers/drop_trait.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn drop_example() {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Messenger` is never used
[INFO] [stdout]   --> src/pointers/refcell.rs:15:11
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub trait Messenger {
[INFO] [stdout]    |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LimitTracker` is never constructed
[INFO] [stdout]   --> src/pointers/refcell.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct LimitTracker<'a, T: Messenger> {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `set_value` are never used
[INFO] [stdout]   --> src/pointers/refcell.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 25 | / impl<'a, T> LimitTracker<'a, T>
[INFO] [stdout] 26 | |     where
[INFO] [stdout] 27 | |         T: Messenger,
[INFO] [stdout]    | |_____________________- associated items in this implementation
[INFO] [stdout] 28 |   {
[INFO] [stdout] 29 |       pub fn new(messenger: &'a T, max: usize) -> LimitTracker<'a, T> {
[INFO] [stdout]    |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 36 |       pub fn set_value(&mut self, value: usize) {
[INFO] [stdout]    |              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List` is never used
[INFO] [stdout]    --> src/pointers/refcell.rs:115:6
[INFO] [stdout]     |
[INFO] [stdout] 115 | enum List {
[INFO] [stdout]     |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rc_rccell_list_usage` is never used
[INFO] [stdout]    --> src/pointers/refcell.rs:120:4
[INFO] [stdout]     |
[INFO] [stdout] 120 | fn rc_rccell_list_usage() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `MmList` is never used
[INFO] [stdout]  --> src/pointers/memory_leak.rs:5:6
[INFO] [stdout]   |
[INFO] [stdout] 5 | enum MmList {
[INFO] [stdout]   |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `tail` is never used
[INFO] [stdout]   --> src/pointers/memory_leak.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl MmList {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] 11 |     fn tail(&self) -> Option<&RefCell<Rc<MmList>>> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `mem_leak` is never used
[INFO] [stdout]   --> src/pointers/memory_leak.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn mem_leak() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/training/linked_list/prototype_1.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Node<T> {
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/training/linked_list/prototype_1.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl<T> Node<T> {
[INFO] [stdout]    | --------------- associated function in this implementation
[INFO] [stdout] 12 |     pub fn new(value: T) -> Node<T> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ll_proto_1` is never used
[INFO] [stdout]   --> src/training/linked_list/prototype_1.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn ll_proto_1() {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `NodeV2` is never constructed
[INFO] [stdout]   --> src/training/linked_list/prototype_1.rs:64:12
[INFO] [stdout]    |
[INFO] [stdout] 64 | pub struct NodeV2<T> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `set_next`, and `get_value` are never used
[INFO] [stdout]   --> src/training/linked_list/prototype_1.rs:71:12
[INFO] [stdout]    |
[INFO] [stdout] 70 | impl<T> NodeV2<T> {
[INFO] [stdout]    | ----------------- associated items in this implementation
[INFO] [stdout] 71 |     pub fn new(value: T) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 79 |     pub fn set_next(&mut self, node: NodeV2<T>) {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 83 |     pub fn get_value(&self)->&T{
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ll_proto_1_1` is never used
[INFO] [stdout]   --> src/training/linked_list/prototype_1.rs:92:8
[INFO] [stdout]    |
[INFO] [stdout] 92 | pub fn ll_proto_1_1() {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `NodeV2` is never constructed
[INFO] [stdout]  --> src/training/linked_list/prototype_2.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct NodeV2<T> {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LinkedList` is never constructed
[INFO] [stdout]   --> src/training/linked_list/prototype_2.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct LinkedList<T> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `add`, `move_next`, `move_prev`, and `remove` are never used
[INFO] [stdout]   --> src/training/linked_list/prototype_2.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl<T> LinkedList<T> {
[INFO] [stdout]    | --------------------- associated items in this implementation
[INFO] [stdout] 20 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |     pub fn add(&mut self, value: T) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 47 |     pub fn move_next(&mut self) -> Option<Ref<NodeV2<T>>> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 71 |     pub fn move_prev() -> Option<Rc<RefCell<NodeV2<T>>>> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 75 |     pub fn remove(&mut self, index: usize) {}
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ll_proto_2` is never used
[INFO] [stdout]   --> src/training/linked_list/prototype_2.rs:78:8
[INFO] [stdout]    |
[INFO] [stdout] 78 | pub fn ll_proto_2() {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `S1S2Using` should have a snake case name
[INFO] [stdout]    --> src/trait.rs:102:4
[INFO] [stdout]     |
[INFO] [stdout] 102 | fn S1S2Using() -> Box<dyn Summary> {
[INFO] [stdout]     |    ^^^^^^^^^ help: convert the identifier to snake case: `s1_s2_using`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rwlResult` should have a snake case name
[INFO] [stdout]   --> src/references_with_lifetime.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub fn rwlResult() {
[INFO] [stdout]    |        ^^^^^^^^^ help: convert the identifier to snake case: `rwl_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/training/linked_list/prototype_2.rs:47:22
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn move_next(&mut self) -> Option<Ref<NodeV2<T>>> {
[INFO] [stdout]    |                      ^^^^^^^^^            ^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn move_next(&mut self) -> Option<Ref<'_, NodeV2<T>>> {
[INFO] [stdout]    |                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.30s
[INFO] running `Command { std: "docker" "inspect" "d4fb2f237cec9db9b4835372d68f78bebc67fa10556e8ab99a58d5545feae734", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4fb2f237cec9db9b4835372d68f78bebc67fa10556e8ab99a58d5545feae734", kill_on_drop: false }`
[INFO] [stdout] d4fb2f237cec9db9b4835372d68f78bebc67fa10556e8ab99a58d5545feae734
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f467cf0c1556d14d11e0abc6215f0d51b1cf2ce5f36dc0d3bae11c588a6520ec
[INFO] running `Command { std: "docker" "start" "-a" "f467cf0c1556d14d11e0abc6215f0d51b1cf2ce5f36dc0d3bae11c588a6520ec", kill_on_drop: false }`
[INFO] [stderr]    Compiling hello-world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Stdio`
[INFO] [stdout]  --> src/main.rs:3:29
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::process::{Command, Stdio};
[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: `crate::borrow::borrow_checker`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crate::borrow::borrow_checker;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::ownership::example_ownership`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use crate::ownership::example_ownership;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::references_with_lifetime::rwl`
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use crate::references_with_lifetime::rwl;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Cons` and `Nil`
[INFO] [stdout]  --> src/main.rs:9:36
[INFO] [stdout]   |
[INFO] [stdout] 9 | use crate::pointers::r#box::List::{Cons, Nil};
[INFO] [stdout]   |                                    ^^^^  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Cons as RcCons` and `Nil as RcNil`
[INFO] [stdout]   --> src/main.rs:10:37
[INFO] [stdout]    |
[INFO] [stdout] 10 | use crate::pointers::r#rc::RcList::{Cons as RcCons, Nil as RcNil};
[INFO] [stdout]    |                                     ^^^^^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ll_proto_1_1` and `ll_proto_1`
[INFO] [stdout]   --> src/main.rs:11:49
[INFO] [stdout]    |
[INFO] [stdout] 11 | use crate::training::linked_list::prototype_1::{ll_proto_1, ll_proto_1_1};
[INFO] [stdout]    |                                                 ^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::training::linked_list::prototype_2::ll_proto_2`
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use crate::training::linked_list::prototype_2::ll_proto_2;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::Display`
[INFO] [stdout]  --> src/basic_variable_and_types.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::Display;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::env::SplitPaths`
[INFO] [stdout]  --> src/generic.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::env::SplitPaths;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]  --> src/pointers/box.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ops::Deref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `RefMut`
[INFO] [stdout]  --> src/training/linked_list/prototype_1.rs:1:26
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cell::{RefCell, RefMut};
[INFO] [stdout]   |                          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `DerefMut` and `Deref`
[INFO] [stdout]  --> src/training/linked_list/prototype_2.rs:2:16
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::ops::{Deref, DerefMut};
[INFO] [stdout]   |                ^^^^^  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::training::linked_list::prototype_1::Node`
[INFO] [stdout]  --> src/training/linked_list/prototype_2.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::training::linked_list::prototype_1::Node;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `log::info`
[INFO] [stdout]  --> src/training/sum_2_nums/sum_2_nums.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use log::info;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/main.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 54 |     return;
[INFO] [stdout]    |     ------ any code following this expression is unreachable
[INFO] [stdout] 55 |     let fifo_path = "/tmp/xterm_fifo";
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `asd`
[INFO] [stdout]  --> src/basic_variable_and_types.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let asd = 89;
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_asd`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `asd`
[INFO] [stdout]   --> src/basic_variable_and_types.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |         let asd = asd.to_string();
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_asd`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `asd` is assigned to, but never used
[INFO] [stdout]   --> src/basic_variable_and_types.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let mut asd = 89;
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_asd` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `asd` is never read
[INFO] [stdout]   --> src/basic_variable_and_types.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     asd = 4;
[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: unused variable: `num`
[INFO] [stdout]   --> src/basic_variable_and_types.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let num: i32 = str_number.parse().expect("");
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_num`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `qwe`
[INFO] [stdout]   --> src/basic_variable_and_types.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let qwe = if asd == 1 { -1 } else { 0 };
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_qwe`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]   --> src/basic_variable_and_types.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let result = loop {
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/ownership.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let b = a.clone();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/ownership.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let b = a.clone();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `asd`
[INFO] [stdout]   --> src/struct.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let asd = vec![1,2,3];
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_asd`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/trait.rs:59:30
[INFO] [stdout]    |
[INFO] [stdout] 59 | pub fn notify_multiple_trait(item: &(impl Summary + Display)) {}
[INFO] [stdout]    |                              ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/trait.rs:61:60
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub fn notify_multiple_trait_generic<T: Summary + Display>(item: &T) {}
[INFO] [stdout]    |                                                            ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/trait.rs:64:34
[INFO] [stdout]    |
[INFO] [stdout] 64 | pub fn notify_mtg_alternative<T>(item: &T)
[INFO] [stdout]    |                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str1`
[INFO] [stdout]   --> src/references_with_lifetime.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let str1 = String::from("long string");
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_str1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str2`
[INFO] [stdout]   --> src/references_with_lifetime.rs:36:13
[INFO] [stdout]    |
[INFO] [stdout] 36 |         let str2 = String::from("shrt str");
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_str2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/references_with_lifetime.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let i = ImportantExcerpt {//hold ref to the first sentence of the String owned by `novel` variable.
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/references_with_lifetime.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |     let s: &'static str = "static lifetime 🙄";
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/pointers/rc.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let b = RcList::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/pointers/rc.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let c = RcList::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: `list`
[INFO] [stdout]   --> src/pointers/box.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let list = Cons(1,
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_list`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/pointers/drop_trait.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let c = CustomSmartPointer {
[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/pointers/drop_trait.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let d = CustomSmartPointer {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]   --> src/training/linked_list/prototype_2.rs:75:30
[INFO] [stdout]    |
[INFO] [stdout] 75 |     pub fn remove(&mut self, index: usize) {}
[INFO] [stdout]    |                              ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example_of_shadowing` is never used
[INFO] [stdout]  --> src/basic_variable_and_types.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn example_of_shadowing() {
[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 `example_of_mut` is never used
[INFO] [stdout]   --> src/basic_variable_and_types.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn example_of_mut() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example_of_converting_from_string` is never used
[INFO] [stdout]   --> src/basic_variable_and_types.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub fn example_of_converting_from_string() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example_of_assigning` is never used
[INFO] [stdout]   --> src/basic_variable_and_types.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn example_of_assigning() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example_of_loop` is never used
[INFO] [stdout]   --> src/basic_variable_and_types.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub fn example_of_loop() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `loop_through_collection` is never used
[INFO] [stdout]   --> src/basic_variable_and_types.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub fn loop_through_collection() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example_ownership` is never used
[INFO] [stdout]   --> src/ownership.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub fn example_ownership() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example_ownership_clone` is never used
[INFO] [stdout]   --> src/ownership.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub fn example_ownership_clone() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Some` is never constructed
[INFO] [stdout]   --> src/ownership.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | struct Some {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `display` is never used
[INFO] [stdout]   --> src/ownership.rs:38:12
[INFO] [stdout]    |
[INFO] [stdout] 37 | impl Some {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] 38 |     pub fn display(&self) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `borrow_checker` is never used
[INFO] [stdout]  --> src/borrow.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn borrow_checker() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `slice` is never used
[INFO] [stdout]  --> src/slice.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn slice() {}
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_word_index_of_end` is never used
[INFO] [stdout]  --> src/slice.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn first_word_index_of_end(s: &String) -> usize {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `string_slices` is never used
[INFO] [stdout]   --> src/slice.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn string_slices(s: &String) -> &str {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]  --> src/struct.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Rectangle {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `work_with_struct` is never used
[INFO] [stdout]  --> src/struct.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn work_with_struct() {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `largest` is never used
[INFO] [stdout]  --> src/generic.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn largest<T: PartialOrd>(list: &[T]) -> &T {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `generic_example_run` is never used
[INFO] [stdout]   --> src/generic.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn generic_example_run() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]   --> src/generic.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | struct Point<T> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `x` is never used
[INFO] [stdout]   --> src/generic.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl<T> Point<T> {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] 28 |     fn x(&self) -> &T {
[INFO] [stdout]    |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example_of_use_point` is never used
[INFO] [stdout]   --> src/generic.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn example_of_use_point() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Summary` is never used
[INFO] [stdout]  --> src/trait.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub trait Summary {
[INFO] [stdout]   |           ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `NewsArticle` is never constructed
[INFO] [stdout]   --> src/trait.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct NewsArticle {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Tweet` is never constructed
[INFO] [stdout]   --> src/trait.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub struct Tweet {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify` is never used
[INFO] [stdout]   --> src/trait.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub fn notify(item: &impl Summary) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_bound_syntax` is never used
[INFO] [stdout]   --> src/trait.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub fn notify_bound_syntax<T: Summary>(item: &T) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_multiple_trait` is never used
[INFO] [stdout]   --> src/trait.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | pub fn notify_multiple_trait(item: &(impl Summary + Display)) {}
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_multiple_trait_generic` is never used
[INFO] [stdout]   --> src/trait.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub fn notify_multiple_trait_generic<T: Summary + Display>(item: &T) {}
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify_mtg_alternative` is never used
[INFO] [stdout]   --> src/trait.rs:64:8
[INFO] [stdout]    |
[INFO] [stdout] 64 | pub fn notify_mtg_alternative<T>(item: &T)
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `returns_summarizable` is never used
[INFO] [stdout]   --> src/trait.rs:70:4
[INFO] [stdout]    |
[INFO] [stdout] 70 | fn returns_summarizable() -> impl Summary {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `S1` is never constructed
[INFO] [stdout]   --> src/trait.rs:82:8
[INFO] [stdout]    |
[INFO] [stdout] 82 | struct S1 {
[INFO] [stdout]    |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `S2` is never constructed
[INFO] [stdout]   --> src/trait.rs:86:8
[INFO] [stdout]    |
[INFO] [stdout] 86 | struct S2 {
[INFO] [stdout]    |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `S1S2Using` is never used
[INFO] [stdout]    --> src/trait.rs:102:4
[INFO] [stdout]     |
[INFO] [stdout] 102 | fn S1S2Using() -> Box<dyn Summary> {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]    --> src/trait.rs:119:8
[INFO] [stdout]     |
[INFO] [stdout] 119 | struct Pair<T> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/trait.rs:125:8
[INFO] [stdout]     |
[INFO] [stdout] 124 | impl<T> Pair<T> {
[INFO] [stdout]     | --------------- associated function in this implementation
[INFO] [stdout] 125 |     fn new(x: T, y: T) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `cmp_display` is never used
[INFO] [stdout]    --> src/trait.rs:133:8
[INFO] [stdout]     |
[INFO] [stdout] 132 | impl<T: Display + PartialOrd> Pair<T> {
[INFO] [stdout]     | ------------------------------------- method in this implementation
[INFO] [stdout] 133 |     fn cmp_display(&self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rwl` is never used
[INFO] [stdout]   --> src/references_with_lifetime.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub fn rwl<'a>(str1: &'a str, str2: &'a str) -> &'a str {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rwlResult` is never used
[INFO] [stdout]   --> src/references_with_lifetime.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub fn rwlResult() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ImportantExcerpt` is never constructed
[INFO] [stdout]   --> src/references_with_lifetime.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 43 | struct ImportantExcerpt<'a> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `asdf` is never used
[INFO] [stdout]   --> src/references_with_lifetime.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn asdf() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `static_lifetime` is never used
[INFO] [stdout]   --> src/references_with_lifetime.rs:59:4
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn static_lifetime() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest_with_an_announcement` is never used
[INFO] [stdout]   --> src/references_with_lifetime.rs:64:4
[INFO] [stdout]    |
[INFO] [stdout] 64 | fn longest_with_an_announcement<'a, T>(
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `e` is never used
[INFO] [stdout]   --> src/pointers/mod.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn e() {}
[INFO] [stdout]    |    ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `RcList` is never used
[INFO] [stdout]   --> src/pointers/rc.rs:16:10
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub enum RcList {
[INFO] [stdout]    |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rc_example` is never used
[INFO] [stdout]   --> src/pointers/rc.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn rc_example() {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List` is never used
[INFO] [stdout]   --> src/pointers/box.rs:16:10
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub enum List {
[INFO] [stdout]    |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `nested_list` is never used
[INFO] [stdout]   --> src/pointers/box.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn nested_list() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyBox` is never constructed
[INFO] [stdout]  --> src/pointers/defer_trait.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct MyBox<T>(T);
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> src/pointers/defer_trait.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | impl<T> MyBox<T> {
[INFO] [stdout]   | ---------------- associated function in this implementation
[INFO] [stdout] 7 |     fn new(x: T) -> MyBox<T> {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hello` is never used
[INFO] [stdout]   --> src/pointers/defer_trait.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn hello(name: &str) {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `deref_coercion_example` is never used
[INFO] [stdout]   --> src/pointers/defer_trait.rs:45:4
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn deref_coercion_example() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `no_deref_coercion_example` is never used
[INFO] [stdout]   --> src/pointers/defer_trait.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn no_deref_coercion_example() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CustomSmartPointer` is never constructed
[INFO] [stdout]  --> src/pointers/drop_trait.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct CustomSmartPointer {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `drop_usage_example` is never used
[INFO] [stdout]   --> src/pointers/drop_trait.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn drop_usage_example() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `drop_example` is never used
[INFO] [stdout]   --> src/pointers/drop_trait.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn drop_example() {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Messenger` is never used
[INFO] [stdout]   --> src/pointers/refcell.rs:15:11
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub trait Messenger {
[INFO] [stdout]    |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LimitTracker` is never constructed
[INFO] [stdout]   --> src/pointers/refcell.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct LimitTracker<'a, T: Messenger> {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `set_value` are never used
[INFO] [stdout]   --> src/pointers/refcell.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 25 | / impl<'a, T> LimitTracker<'a, T>
[INFO] [stdout] 26 | |     where
[INFO] [stdout] 27 | |         T: Messenger,
[INFO] [stdout]    | |_____________________- associated items in this implementation
[INFO] [stdout] 28 |   {
[INFO] [stdout] 29 |       pub fn new(messenger: &'a T, max: usize) -> LimitTracker<'a, T> {
[INFO] [stdout]    |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 36 |       pub fn set_value(&mut self, value: usize) {
[INFO] [stdout]    |              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List` is never used
[INFO] [stdout]    --> src/pointers/refcell.rs:115:6
[INFO] [stdout]     |
[INFO] [stdout] 115 | enum List {
[INFO] [stdout]     |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rc_rccell_list_usage` is never used
[INFO] [stdout]    --> src/pointers/refcell.rs:120:4
[INFO] [stdout]     |
[INFO] [stdout] 120 | fn rc_rccell_list_usage() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `MmList` is never used
[INFO] [stdout]  --> src/pointers/memory_leak.rs:5:6
[INFO] [stdout]   |
[INFO] [stdout] 5 | enum MmList {
[INFO] [stdout]   |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `tail` is never used
[INFO] [stdout]   --> src/pointers/memory_leak.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl MmList {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] 11 |     fn tail(&self) -> Option<&RefCell<Rc<MmList>>> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `mem_leak` is never used
[INFO] [stdout]   --> src/pointers/memory_leak.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn mem_leak() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/training/linked_list/prototype_1.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Node<T> {
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/training/linked_list/prototype_1.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl<T> Node<T> {
[INFO] [stdout]    | --------------- associated function in this implementation
[INFO] [stdout] 12 |     pub fn new(value: T) -> Node<T> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ll_proto_1` is never used
[INFO] [stdout]   --> src/training/linked_list/prototype_1.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn ll_proto_1() {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `NodeV2` is never constructed
[INFO] [stdout]   --> src/training/linked_list/prototype_1.rs:64:12
[INFO] [stdout]    |
[INFO] [stdout] 64 | pub struct NodeV2<T> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `set_next`, and `get_value` are never used
[INFO] [stdout]   --> src/training/linked_list/prototype_1.rs:71:12
[INFO] [stdout]    |
[INFO] [stdout] 70 | impl<T> NodeV2<T> {
[INFO] [stdout]    | ----------------- associated items in this implementation
[INFO] [stdout] 71 |     pub fn new(value: T) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 79 |     pub fn set_next(&mut self, node: NodeV2<T>) {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 83 |     pub fn get_value(&self)->&T{
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ll_proto_1_1` is never used
[INFO] [stdout]   --> src/training/linked_list/prototype_1.rs:92:8
[INFO] [stdout]    |
[INFO] [stdout] 92 | pub fn ll_proto_1_1() {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `NodeV2` is never constructed
[INFO] [stdout]  --> src/training/linked_list/prototype_2.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct NodeV2<T> {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LinkedList` is never constructed
[INFO] [stdout]   --> src/training/linked_list/prototype_2.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct LinkedList<T> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `add`, `move_next`, `move_prev`, and `remove` are never used
[INFO] [stdout]   --> src/training/linked_list/prototype_2.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl<T> LinkedList<T> {
[INFO] [stdout]    | --------------------- associated items in this implementation
[INFO] [stdout] 20 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |     pub fn add(&mut self, value: T) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 47 |     pub fn move_next(&mut self) -> Option<Ref<NodeV2<T>>> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 71 |     pub fn move_prev() -> Option<Rc<RefCell<NodeV2<T>>>> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 75 |     pub fn remove(&mut self, index: usize) {}
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ll_proto_2` is never used
[INFO] [stdout]   --> src/training/linked_list/prototype_2.rs:78:8
[INFO] [stdout]    |
[INFO] [stdout] 78 | pub fn ll_proto_2() {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `S1S2Using` should have a snake case name
[INFO] [stdout]    --> src/trait.rs:102:4
[INFO] [stdout]     |
[INFO] [stdout] 102 | fn S1S2Using() -> Box<dyn Summary> {
[INFO] [stdout]     |    ^^^^^^^^^ help: convert the identifier to snake case: `s1_s2_using`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rwlResult` should have a snake case name
[INFO] [stdout]   --> src/references_with_lifetime.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub fn rwlResult() {
[INFO] [stdout]    |        ^^^^^^^^^ help: convert the identifier to snake case: `rwl_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/training/linked_list/prototype_2.rs:47:22
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn move_next(&mut self) -> Option<Ref<NodeV2<T>>> {
[INFO] [stdout]    |                      ^^^^^^^^^            ^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn move_next(&mut self) -> Option<Ref<'_, NodeV2<T>>> {
[INFO] [stdout]    |                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `Command { std: "docker" "inspect" "f467cf0c1556d14d11e0abc6215f0d51b1cf2ce5f36dc0d3bae11c588a6520ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f467cf0c1556d14d11e0abc6215f0d51b1cf2ce5f36dc0d3bae11c588a6520ec", kill_on_drop: false }`
[INFO] [stdout] f467cf0c1556d14d11e0abc6215f0d51b1cf2ce5f36dc0d3bae11c588a6520ec
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e86a95053e1b1d7a3e91501ec03357ab69ba6eaa75f7a9deee3e997b9966feaa
[INFO] running `Command { std: "docker" "start" "-a" "e86a95053e1b1d7a3e91501ec03357ab69ba6eaa75f7a9deee3e997b9966feaa", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr] warning: unused import: `Stdio`
[INFO] [stderr]  --> src/main.rs:3:29
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::process::{Command, Stdio};
[INFO] [stderr]   |                             ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::borrow::borrow_checker`
[INFO] [stderr]  --> src/main.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use crate::borrow::borrow_checker;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::ownership::example_ownership`
[INFO] [stderr]  --> src/main.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use crate::ownership::example_ownership;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::references_with_lifetime::rwl`
[INFO] [stderr]  --> src/main.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use crate::references_with_lifetime::rwl;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Cons` and `Nil`
[INFO] [stderr]  --> src/main.rs:9:36
[INFO] [stderr]   |
[INFO] [stderr] 9 | use crate::pointers::r#box::List::{Cons, Nil};
[INFO] [stderr]   |                                    ^^^^  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Cons as RcCons` and `Nil as RcNil`
[INFO] [stderr]   --> src/main.rs:10:37
[INFO] [stderr]    |
[INFO] [stderr] 10 | use crate::pointers::r#rc::RcList::{Cons as RcCons, Nil as RcNil};
[INFO] [stderr]    |                                     ^^^^^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `ll_proto_1_1` and `ll_proto_1`
[INFO] [stderr]   --> src/main.rs:11:49
[INFO] [stderr]    |
[INFO] [stderr] 11 | use crate::training::linked_list::prototype_1::{ll_proto_1, ll_proto_1_1};
[INFO] [stderr]    |                                                 ^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::training::linked_list::prototype_2::ll_proto_2`
[INFO] [stderr]   --> src/main.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | use crate::training::linked_list::prototype_2::ll_proto_2;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt::Display`
[INFO] [stderr]  --> src/basic_variable_and_types.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fmt::Display;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::env::SplitPaths`
[INFO] [stderr]  --> src/generic.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::env::SplitPaths;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Deref`
[INFO] [stderr]  --> src/pointers/box.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::ops::Deref;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `RefMut`
[INFO] [stderr]  --> src/training/linked_list/prototype_1.rs:1:26
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::cell::{RefCell, RefMut};
[INFO] [stderr]   |                          ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `DerefMut` and `Deref`
[INFO] [stderr]  --> src/training/linked_list/prototype_2.rs:2:16
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::ops::{Deref, DerefMut};
[INFO] [stderr]   |                ^^^^^  ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::training::linked_list::prototype_1::Node`
[INFO] [stderr]  --> src/training/linked_list/prototype_2.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use crate::training::linked_list::prototype_1::Node;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `log::info`
[INFO] [stderr]  --> src/training/sum_2_nums/sum_2_nums.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use log::info;
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]   --> src/main.rs:55:5
[INFO] [stderr]    |
[INFO] [stderr] 54 |     return;
[INFO] [stderr]    |     ------ any code following this expression is unreachable
[INFO] [stderr] 55 |     let fifo_path = "/tmp/xterm_fifo";
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `asd`
[INFO] [stderr]  --> src/basic_variable_and_types.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let asd = 89;
[INFO] [stderr]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_asd`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `asd`
[INFO] [stderr]   --> src/basic_variable_and_types.rs:12:13
[INFO] [stderr]    |
[INFO] [stderr] 12 |         let asd = asd.to_string();
[INFO] [stderr]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_asd`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `asd` is assigned to, but never used
[INFO] [stderr]   --> src/basic_variable_and_types.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let mut asd = 89;
[INFO] [stderr]    |         ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_asd` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `asd` is never read
[INFO] [stderr]   --> src/basic_variable_and_types.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     asd = 4;
[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: unused variable: `num`
[INFO] [stderr]   --> src/basic_variable_and_types.rs:26:9
[INFO] [stderr]    |
[INFO] [stderr] 26 |     let num: i32 = str_number.parse().expect("");
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_num`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `qwe`
[INFO] [stderr]   --> src/basic_variable_and_types.rs:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 |     let qwe = if asd == 1 { -1 } else { 0 };
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_qwe`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `result`
[INFO] [stderr]   --> src/basic_variable_and_types.rs:38:9
[INFO] [stderr]    |
[INFO] [stderr] 38 |     let result = loop {
[INFO] [stderr]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/ownership.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let b = a.clone();
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/ownership.rs:27:9
[INFO] [stderr]    |
[INFO] [stderr] 27 |     let b = a.clone();
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `asd`
[INFO] [stderr]   --> src/struct.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |     let asd = vec![1,2,3];
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_asd`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item`
[INFO] [stderr]   --> src/trait.rs:59:30
[INFO] [stderr]    |
[INFO] [stderr] 59 | pub fn notify_multiple_trait(item: &(impl Summary + Display)) {}
[INFO] [stderr]    |                              ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item`
[INFO] [stderr]   --> src/trait.rs:61:60
[INFO] [stderr]    |
[INFO] [stderr] 61 | pub fn notify_multiple_trait_generic<T: Summary + Display>(item: &T) {}
[INFO] [stderr]    |                                                            ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item`
[INFO] [stderr]   --> src/trait.rs:64:34
[INFO] [stderr]    |
[INFO] [stderr] 64 | pub fn notify_mtg_alternative<T>(item: &T)
[INFO] [stderr]    |                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `str1`
[INFO] [stderr]   --> src/references_with_lifetime.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |     let str1 = String::from("long string");
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_str1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `str2`
[INFO] [stderr]   --> src/references_with_lifetime.rs:36:13
[INFO] [stderr]    |
[INFO] [stderr] 36 |         let str2 = String::from("shrt str");
[INFO] [stderr]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_str2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/references_with_lifetime.rs:50:9
[INFO] [stderr]    |
[INFO] [stderr] 50 |     let i = ImportantExcerpt {//hold ref to the first sentence of the String owned by `novel` variable.
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]   --> src/references_with_lifetime.rs:60:9
[INFO] [stderr]    |
[INFO] [stderr] 60 |     let s: &'static str = "static lifetime 🙄";
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/pointers/rc.rs:25:9
[INFO] [stderr]    |
[INFO] [stderr] 25 |     let b = RcList::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/pointers/rc.rs:26:9
[INFO] [stderr]    |
[INFO] [stderr] 26 |     let c = RcList::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: `list`
[INFO] [stderr]   --> src/pointers/box.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let list = Cons(1,
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_list`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]   --> src/pointers/drop_trait.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |     let c = CustomSmartPointer {
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d`
[INFO] [stderr]   --> src/pointers/drop_trait.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let d = CustomSmartPointer {
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `index`
[INFO] [stderr]   --> src/training/linked_list/prototype_2.rs:75:30
[INFO] [stderr]    |
[INFO] [stderr] 75 |     pub fn remove(&mut self, index: usize) {}
[INFO] [stderr]    |                              ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stderr] 
[INFO] [stderr] warning: function `example_of_shadowing` is never used
[INFO] [stderr]  --> src/basic_variable_and_types.rs:8:8
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub fn example_of_shadowing() {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `example_of_mut` is never used
[INFO] [stderr]   --> src/basic_variable_and_types.rs:19:8
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub fn example_of_mut() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `example_of_converting_from_string` is never used
[INFO] [stderr]   --> src/basic_variable_and_types.rs:24:8
[INFO] [stderr]    |
[INFO] [stderr] 24 | pub fn example_of_converting_from_string() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `example_of_assigning` is never used
[INFO] [stderr]   --> src/basic_variable_and_types.rs:29:8
[INFO] [stderr]    |
[INFO] [stderr] 29 | pub fn example_of_assigning() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `example_of_loop` is never used
[INFO] [stderr]   --> src/basic_variable_and_types.rs:47:8
[INFO] [stderr]    |
[INFO] [stderr] 47 | pub fn example_of_loop() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `loop_through_collection` is never used
[INFO] [stderr]   --> src/basic_variable_and_types.rs:69:8
[INFO] [stderr]    |
[INFO] [stderr] 69 | pub fn loop_through_collection() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `example_ownership` is never used
[INFO] [stderr]   --> src/ownership.rs:16:8
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub fn example_ownership() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `example_ownership_clone` is never used
[INFO] [stderr]   --> src/ownership.rs:22:8
[INFO] [stderr]    |
[INFO] [stderr] 22 | pub fn example_ownership_clone() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Some` is never constructed
[INFO] [stderr]   --> src/ownership.rs:33:8
[INFO] [stderr]    |
[INFO] [stderr] 33 | struct Some {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `display` is never used
[INFO] [stderr]   --> src/ownership.rs:38:12
[INFO] [stderr]    |
[INFO] [stderr] 37 | impl Some {
[INFO] [stderr]    | --------- method in this implementation
[INFO] [stderr] 38 |     pub fn display(&self) {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `borrow_checker` is never used
[INFO] [stderr]  --> src/borrow.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn borrow_checker() {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `slice` is never used
[INFO] [stderr]  --> src/slice.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn slice() {}
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `first_word_index_of_end` is never used
[INFO] [stderr]  --> src/slice.rs:8:4
[INFO] [stderr]   |
[INFO] [stderr] 8 | fn first_word_index_of_end(s: &String) -> usize {
[INFO] [stderr]   |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `string_slices` is never used
[INFO] [stderr]   --> src/slice.rs:19:4
[INFO] [stderr]    |
[INFO] [stderr] 19 | fn string_slices(s: &String) -> &str {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Rectangle` is never constructed
[INFO] [stderr]  --> src/struct.rs:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 | struct Rectangle {
[INFO] [stderr]   |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `work_with_struct` is never used
[INFO] [stderr]  --> src/struct.rs:7:4
[INFO] [stderr]   |
[INFO] [stderr] 7 | fn work_with_struct() {
[INFO] [stderr]   |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `largest` is never used
[INFO] [stderr]  --> src/generic.rs:3:4
[INFO] [stderr]   |
[INFO] [stderr] 3 | fn largest<T: PartialOrd>(list: &[T]) -> &T {
[INFO] [stderr]   |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `generic_example_run` is never used
[INFO] [stderr]   --> src/generic.rs:13:8
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub fn generic_example_run() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Point` is never constructed
[INFO] [stderr]   --> src/generic.rs:22:8
[INFO] [stderr]    |
[INFO] [stderr] 22 | struct Point<T> {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `x` is never used
[INFO] [stderr]   --> src/generic.rs:28:8
[INFO] [stderr]    |
[INFO] [stderr] 27 | impl<T> Point<T> {
[INFO] [stderr]    | ---------------- method in this implementation
[INFO] [stderr] 28 |     fn x(&self) -> &T {
[INFO] [stderr]    |        ^
[INFO] [stderr] 
[INFO] [stderr] warning: function `example_of_use_point` is never used
[INFO] [stderr]   --> src/generic.rs:33:4
[INFO] [stderr]    |
[INFO] [stderr] 33 | fn example_of_use_point() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Summary` is never used
[INFO] [stderr]  --> src/trait.rs:7:11
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub trait Summary {
[INFO] [stderr]   |           ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `NewsArticle` is never constructed
[INFO] [stderr]   --> src/trait.rs:14:12
[INFO] [stderr]    |
[INFO] [stderr] 14 | pub struct NewsArticle {
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Tweet` is never constructed
[INFO] [stderr]   --> src/trait.rs:27:12
[INFO] [stderr]    |
[INFO] [stderr] 27 | pub struct Tweet {
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notify` is never used
[INFO] [stderr]   --> src/trait.rs:46:8
[INFO] [stderr]    |
[INFO] [stderr] 46 | pub fn notify(item: &impl Summary) {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notify_bound_syntax` is never used
[INFO] [stderr]   --> src/trait.rs:55:8
[INFO] [stderr]    |
[INFO] [stderr] 55 | pub fn notify_bound_syntax<T: Summary>(item: &T) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notify_multiple_trait` is never used
[INFO] [stderr]   --> src/trait.rs:59:8
[INFO] [stderr]    |
[INFO] [stderr] 59 | pub fn notify_multiple_trait(item: &(impl Summary + Display)) {}
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notify_multiple_trait_generic` is never used
[INFO] [stderr]   --> src/trait.rs:61:8
[INFO] [stderr]    |
[INFO] [stderr] 61 | pub fn notify_multiple_trait_generic<T: Summary + Display>(item: &T) {}
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notify_mtg_alternative` is never used
[INFO] [stderr]   --> src/trait.rs:64:8
[INFO] [stderr]    |
[INFO] [stderr] 64 | pub fn notify_mtg_alternative<T>(item: &T)
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `returns_summarizable` is never used
[INFO] [stderr]   --> src/trait.rs:70:4
[INFO] [stderr]    |
[INFO] [stderr] 70 | fn returns_summarizable() -> impl Summary {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `S1` is never constructed
[INFO] [stderr]   --> src/trait.rs:82:8
[INFO] [stderr]    |
[INFO] [stderr] 82 | struct S1 {
[INFO] [stderr]    |        ^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `S2` is never constructed
[INFO] [stderr]   --> src/trait.rs:86:8
[INFO] [stderr]    |
[INFO] [stderr] 86 | struct S2 {
[INFO] [stderr]    |        ^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `S1S2Using` is never used
[INFO] [stderr]    --> src/trait.rs:102:4
[INFO] [stderr]     |
[INFO] [stderr] 102 | fn S1S2Using() -> Box<dyn Summary> {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Pair` is never constructed
[INFO] [stderr]    --> src/trait.rs:119:8
[INFO] [stderr]     |
[INFO] [stderr] 119 | struct Pair<T> {
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]    --> src/trait.rs:125:8
[INFO] [stderr]     |
[INFO] [stderr] 124 | impl<T> Pair<T> {
[INFO] [stderr]     | --------------- associated function in this implementation
[INFO] [stderr] 125 |     fn new(x: T, y: T) -> Self {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `cmp_display` is never used
[INFO] [stderr]    --> src/trait.rs:133:8
[INFO] [stderr]     |
[INFO] [stderr] 132 | impl<T: Display + PartialOrd> Pair<T> {
[INFO] [stderr]     | ------------------------------------- method in this implementation
[INFO] [stderr] 133 |     fn cmp_display(&self) {
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `rwl` is never used
[INFO] [stderr]   --> src/references_with_lifetime.rs:18:8
[INFO] [stderr]    |
[INFO] [stderr] 18 | pub fn rwl<'a>(str1: &'a str, str2: &'a str) -> &'a str {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `rwlResult` is never used
[INFO] [stderr]   --> src/references_with_lifetime.rs:32:8
[INFO] [stderr]    |
[INFO] [stderr] 32 | pub fn rwlResult() {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `ImportantExcerpt` is never constructed
[INFO] [stderr]   --> src/references_with_lifetime.rs:43:8
[INFO] [stderr]    |
[INFO] [stderr] 43 | struct ImportantExcerpt<'a> {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `asdf` is never used
[INFO] [stderr]   --> src/references_with_lifetime.rs:47:4
[INFO] [stderr]    |
[INFO] [stderr] 47 | fn asdf() {
[INFO] [stderr]    |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `static_lifetime` is never used
[INFO] [stderr]   --> src/references_with_lifetime.rs:59:4
[INFO] [stderr]    |
[INFO] [stderr] 59 | fn static_lifetime() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `longest_with_an_announcement` is never used
[INFO] [stderr]   --> src/references_with_lifetime.rs:64:4
[INFO] [stderr]    |
[INFO] [stderr] 64 | fn longest_with_an_announcement<'a, T>(
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `e` is never used
[INFO] [stderr]   --> src/pointers/mod.rs:17:4
[INFO] [stderr]    |
[INFO] [stderr] 17 | fn e() {}
[INFO] [stderr]    |    ^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `RcList` is never used
[INFO] [stderr]   --> src/pointers/rc.rs:16:10
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub enum RcList {
[INFO] [stderr]    |          ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `rc_example` is never used
[INFO] [stderr]   --> src/pointers/rc.rs:21:4
[INFO] [stderr]    |
[INFO] [stderr] 21 | fn rc_example() {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `List` is never used
[INFO] [stderr]   --> src/pointers/box.rs:16:10
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub enum List {
[INFO] [stderr]    |          ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `nested_list` is never used
[INFO] [stderr]   --> src/pointers/box.rs:23:4
[INFO] [stderr]    |
[INFO] [stderr] 23 | fn nested_list() {
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `MyBox` is never constructed
[INFO] [stderr]  --> src/pointers/defer_trait.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | struct MyBox<T>(T);
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]  --> src/pointers/defer_trait.rs:7:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | impl<T> MyBox<T> {
[INFO] [stderr]   | ---------------- associated function in this implementation
[INFO] [stderr] 7 |     fn new(x: T) -> MyBox<T> {
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `hello` is never used
[INFO] [stderr]   --> src/pointers/defer_trait.rs:35:4
[INFO] [stderr]    |
[INFO] [stderr] 35 | fn hello(name: &str) {
[INFO] [stderr]    |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `deref_coercion_example` is never used
[INFO] [stderr]   --> src/pointers/defer_trait.rs:45:4
[INFO] [stderr]    |
[INFO] [stderr] 45 | fn deref_coercion_example() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `no_deref_coercion_example` is never used
[INFO] [stderr]   --> src/pointers/defer_trait.rs:58:4
[INFO] [stderr]    |
[INFO] [stderr] 58 | fn no_deref_coercion_example() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `CustomSmartPointer` is never constructed
[INFO] [stderr]  --> src/pointers/drop_trait.rs:8:8
[INFO] [stderr]   |
[INFO] [stderr] 8 | struct CustomSmartPointer {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `drop_usage_example` is never used
[INFO] [stderr]   --> src/pointers/drop_trait.rs:18:4
[INFO] [stderr]    |
[INFO] [stderr] 18 | fn drop_usage_example() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `drop_example` is never used
[INFO] [stderr]   --> src/pointers/drop_trait.rs:33:4
[INFO] [stderr]    |
[INFO] [stderr] 33 | fn drop_example() {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Messenger` is never used
[INFO] [stderr]   --> src/pointers/refcell.rs:15:11
[INFO] [stderr]    |
[INFO] [stderr] 15 | pub trait Messenger {
[INFO] [stderr]    |           ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `LimitTracker` is never constructed
[INFO] [stderr]   --> src/pointers/refcell.rs:19:12
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub struct LimitTracker<'a, T: Messenger> {
[INFO] [stderr]    |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new` and `set_value` are never used
[INFO] [stderr]   --> src/pointers/refcell.rs:29:12
[INFO] [stderr]    |
[INFO] [stderr] 25 | / impl<'a, T> LimitTracker<'a, T>
[INFO] [stderr] 26 | |     where
[INFO] [stderr] 27 | |         T: Messenger,
[INFO] [stderr]    | |_____________________- associated items in this implementation
[INFO] [stderr] 28 |   {
[INFO] [stderr] 29 |       pub fn new(messenger: &'a T, max: usize) -> LimitTracker<'a, T> {
[INFO] [stderr]    |              ^^^
[INFO] [stderr] ...
[INFO] [stderr] 36 |       pub fn set_value(&mut self, value: usize) {
[INFO] [stderr]    |              ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `List` is never used
[INFO] [stderr]    --> src/pointers/refcell.rs:115:6
[INFO] [stderr]     |
[INFO] [stderr] 115 | enum List {
[INFO] [stderr]     |      ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `rc_rccell_list_usage` is never used
[INFO] [stderr]    --> src/pointers/refcell.rs:120:4
[INFO] [stderr]     |
[INFO] [stderr] 120 | fn rc_rccell_list_usage() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `MmList` is never used
[INFO] [stderr]  --> src/pointers/memory_leak.rs:5:6
[INFO] [stderr]   |
[INFO] [stderr] 5 | enum MmList {
[INFO] [stderr]   |      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `tail` is never used
[INFO] [stderr]   --> src/pointers/memory_leak.rs:11:8
[INFO] [stderr]    |
[INFO] [stderr] 10 | impl MmList {
[INFO] [stderr]    | ----------- method in this implementation
[INFO] [stderr] 11 |     fn tail(&self) -> Option<&RefCell<Rc<MmList>>> {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `mem_leak` is never used
[INFO] [stderr]   --> src/pointers/memory_leak.rs:19:4
[INFO] [stderr]    |
[INFO] [stderr] 19 | fn mem_leak() {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Node` is never constructed
[INFO] [stderr]  --> src/training/linked_list/prototype_1.rs:4:12
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub struct Node<T> {
[INFO] [stderr]   |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/training/linked_list/prototype_1.rs:12:12
[INFO] [stderr]    |
[INFO] [stderr] 11 | impl<T> Node<T> {
[INFO] [stderr]    | --------------- associated function in this implementation
[INFO] [stderr] 12 |     pub fn new(value: T) -> Node<T> {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `ll_proto_1` is never used
[INFO] [stderr]   --> src/training/linked_list/prototype_1.rs:23:8
[INFO] [stderr]    |
[INFO] [stderr] 23 | pub fn ll_proto_1() {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `NodeV2` is never constructed
[INFO] [stderr]   --> src/training/linked_list/prototype_1.rs:64:12
[INFO] [stderr]    |
[INFO] [stderr] 64 | pub struct NodeV2<T> {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `set_next`, and `get_value` are never used
[INFO] [stderr]   --> src/training/linked_list/prototype_1.rs:71:12
[INFO] [stderr]    |
[INFO] [stderr] 70 | impl<T> NodeV2<T> {
[INFO] [stderr]    | ----------------- associated items in this implementation
[INFO] [stderr] 71 |     pub fn new(value: T) -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 79 |     pub fn set_next(&mut self, node: NodeV2<T>) {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 83 |     pub fn get_value(&self)->&T{
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `ll_proto_1_1` is never used
[INFO] [stderr]   --> src/training/linked_list/prototype_1.rs:92:8
[INFO] [stderr]    |
[INFO] [stderr] 92 | pub fn ll_proto_1_1() {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `NodeV2` is never constructed
[INFO] [stderr]  --> src/training/linked_list/prototype_2.rs:6:12
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct NodeV2<T> {
[INFO] [stderr]   |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `LinkedList` is never constructed
[INFO] [stderr]   --> src/training/linked_list/prototype_2.rs:12:12
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub struct LinkedList<T> {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `add`, `move_next`, `move_prev`, and `remove` are never used
[INFO] [stderr]   --> src/training/linked_list/prototype_2.rs:20:12
[INFO] [stderr]    |
[INFO] [stderr] 19 | impl<T> LinkedList<T> {
[INFO] [stderr]    | --------------------- associated items in this implementation
[INFO] [stderr] 20 |     pub fn new() -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 28 |     pub fn add(&mut self, value: T) {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 47 |     pub fn move_next(&mut self) -> Option<Ref<NodeV2<T>>> {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 71 |     pub fn move_prev() -> Option<Rc<RefCell<NodeV2<T>>>> {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 75 |     pub fn remove(&mut self, index: usize) {}
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `ll_proto_2` is never used
[INFO] [stderr]   --> src/training/linked_list/prototype_2.rs:78:8
[INFO] [stderr]    |
[INFO] [stderr] 78 | pub fn ll_proto_2() {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `S1S2Using` should have a snake case name
[INFO] [stderr]    --> src/trait.rs:102:4
[INFO] [stderr]     |
[INFO] [stderr] 102 | fn S1S2Using() -> Box<dyn Summary> {
[INFO] [stderr]     |    ^^^^^^^^^ help: convert the identifier to snake case: `s1_s2_using`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `rwlResult` should have a snake case name
[INFO] [stderr]   --> src/references_with_lifetime.rs:32:8
[INFO] [stderr]    |
[INFO] [stderr] 32 | pub fn rwlResult() {
[INFO] [stderr]    |        ^^^^^^^^^ help: convert the identifier to snake case: `rwl_result`
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/training/linked_list/prototype_2.rs:47:22
[INFO] [stderr]    |
[INFO] [stderr] 47 |     pub fn move_next(&mut self) -> Option<Ref<NodeV2<T>>> {
[INFO] [stderr]    |                      ^^^^^^^^^            ^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |                      |
[INFO] [stderr]    |                      the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 47 |     pub fn move_next(&mut self) -> Option<Ref<'_, NodeV2<T>>> {
[INFO] [stderr]    |                                               +++
[INFO] [stderr] 
[INFO] [stderr] warning: `hello-world` (bin "hello-world" test) generated 115 warnings (run `cargo fix --bin "hello-world" -p hello-world --tests` to apply 37 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/hello_world-19a3d613deac329f)
[INFO] [stdout] test pointers::refcell::tests::it_sends_an_over_75_percent_warning_message ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- pointers::refcell::tests::it_sends_an_over_75_percent_warning_message stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'pointers::refcell::tests::it_sends_an_over_75_percent_warning_message' (24) panicked at src/pointers/refcell.rs:91:9:
[INFO] [stdout] assertion `left == right` failed
[INFO] [stdout]   left: 0
[INFO] [stdout]  right: 1
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5858161d1e1a - std[b80a194dd3c418bb]::backtrace_rs::backtrace::libunwind::trace
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x5858161d1e1a - std[b80a194dd3c418bb]::backtrace_rs::backtrace::trace_unsynchronized::<std[b80a194dd3c418bb]::sys::backtrace::_print_fmt::{closure#1}>
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x5858161d1e1a - std[b80a194dd3c418bb]::sys::backtrace::_print_fmt
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/sys/backtrace.rs:74:9
[INFO] [stdout]    3:     0x5858161d1e1a - <<std[b80a194dd3c418bb]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[10b6fa85044e1869]::fmt::Display>::fmt
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/sys/backtrace.rs:44:26
[INFO] [stdout]    4:     0x5858161e5aba - <core[10b6fa85044e1869]::fmt::rt::Argument>::fmt
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/core/src/fmt/rt.rs:152:76
[INFO] [stdout]    5:     0x5858161e5aba - core[10b6fa85044e1869]::fmt::write
[INFO] [stdout]    6:     0x5858161d66a2 - std[b80a194dd3c418bb]::io::default_write_fmt::<alloc[dd269455e567d8e9]::vec::Vec<u8>>
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x5858161d66a2 - <alloc[dd269455e567d8e9]::vec::Vec<u8> as std[b80a194dd3c418bb]::io::Write>::write_fmt
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/io/mod.rs:1994:13
[INFO] [stdout]    8:     0x5858161b102f - <std[b80a194dd3c418bb]::sys::backtrace::BacktraceLock>::print
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/sys/backtrace.rs:47:9
[INFO] [stdout]    9:     0x5858161b102f - std[b80a194dd3c418bb]::panicking::default_hook::{closure#0}
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/panicking.rs:292:27
[INFO] [stdout]   10:     0x5858161ca389 - std[b80a194dd3c418bb]::panicking::default_hook
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/panicking.rs:316:9
[INFO] [stdout]   11:     0x58581616731c - <alloc[dd269455e567d8e9]::boxed::Box<dyn for<'a, 'b> core[10b6fa85044e1869]::ops::function::Fn<(&'a std[b80a194dd3c418bb]::panic::PanicHookInfo<'b>,), Output = ()> + core[10b6fa85044e1869]::marker::Sync + core[10b6fa85044e1869]::marker::Send> as core[10b6fa85044e1869]::ops::function::Fn<(&std[b80a194dd3c418bb]::panic::PanicHookInfo,)>>::call
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/alloc/src/boxed.rs:2254:9
[INFO] [stdout]   12:     0x58581616731c - test[826cbc6ef54ab466]::test_main_with_exit_callback::<test[826cbc6ef54ab466]::test_main::{closure#0}>::{closure#0}
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x5858161ca542 - <alloc[dd269455e567d8e9]::boxed::Box<dyn for<'a, 'b> core[10b6fa85044e1869]::ops::function::Fn<(&'a std[b80a194dd3c418bb]::panic::PanicHookInfo<'b>,), Output = ()> + core[10b6fa85044e1869]::marker::Sync + core[10b6fa85044e1869]::marker::Send> as core[10b6fa85044e1869]::ops::function::Fn<(&std[b80a194dd3c418bb]::panic::PanicHookInfo,)>>::call
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/alloc/src/boxed.rs:2254:9
[INFO] [stdout]   14:     0x5858161ca542 - std[b80a194dd3c418bb]::panicking::panic_with_hook
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/panicking.rs:833:13
[INFO] [stdout]   15:     0x5858161b10e8 - std[b80a194dd3c418bb]::panicking::panic_handler::{closure#0}
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/panicking.rs:698:13
[INFO] [stdout]   16:     0x5858161a8a89 - std[b80a194dd3c418bb]::sys::backtrace::__rust_end_short_backtrace::<std[b80a194dd3c418bb]::panicking::panic_handler::{closure#0}, !>
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/sys/backtrace.rs:182:18
[INFO] [stdout]   17:     0x5858161b1dfd - __rustc[9698a3e60dd14283]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/panicking.rs:689:5
[INFO] [stdout]   18:     0x5858161e62fc - core[10b6fa85044e1869]::panicking::panic_fmt
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/core/src/panicking.rs:80:14
[INFO] [stdout]   19:     0x5858161e6213 - core[10b6fa85044e1869]::panicking::assert_failed_inner
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/core/src/panicking.rs:439:17
[INFO] [stdout]   20:     0x5858161e2898 - core[10b6fa85044e1869]::panicking::assert_failed::<usize, usize>
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/core/src/panicking.rs:394:5
[INFO] [stdout]   21:     0x58581615a4a8 - hello_world::pointers::refcell::tests::it_sends_an_over_75_percent_warning_message::h1c8200ae158e1762
[INFO] [stdout]                                at /opt/rustwide/workdir/src/pointers/refcell.rs:91:9
[INFO] [stdout]   22:     0x58581615a4f7 - hello_world::pointers::refcell::tests::it_sends_an_over_75_percent_warning_message::{{closure}}::h4cca58995091677a
[INFO] [stdout]                                at /opt/rustwide/workdir/src/pointers/refcell.rs:89:53
[INFO] [stdout]   23:     0x58581615a656 - core::ops::function::FnOnce::call_once::hbaecb0d5239d96e4
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x58581615b3fb - <fn() -> core[10b6fa85044e1869]::result::Result<(), alloc[dd269455e567d8e9]::string::String> as core[10b6fa85044e1869]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x58581615b3fb - test[826cbc6ef54ab466]::__rust_begin_short_backtrace::<core[10b6fa85044e1869]::result::Result<(), alloc[dd269455e567d8e9]::string::String>, fn() -> core[10b6fa85044e1869]::result::Result<(), alloc[dd269455e567d8e9]::string::String>>
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/test/src/lib.rs:663:18
[INFO] [stdout]   26:     0x585816167deb - test[826cbc6ef54ab466]::run_test_in_process::{closure#0}
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/test/src/lib.rs:686:74
[INFO] [stdout]   27:     0x585816167deb - <core[10b6fa85044e1869]::panic::unwind_safe::AssertUnwindSafe<test[826cbc6ef54ab466]::run_test_in_process::{closure#0}> as core[10b6fa85044e1869]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   28:     0x585816167deb - std[b80a194dd3c418bb]::panicking::catch_unwind::do_call::<core[10b6fa85044e1869]::panic::unwind_safe::AssertUnwindSafe<test[826cbc6ef54ab466]::run_test_in_process::{closure#0}>, core[10b6fa85044e1869]::result::Result<(), alloc[dd269455e567d8e9]::string::String>>
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/panicking.rs:581:40
[INFO] [stdout]   29:     0x585816167deb - std[b80a194dd3c418bb]::panicking::catch_unwind::<core[10b6fa85044e1869]::result::Result<(), alloc[dd269455e567d8e9]::string::String>, core[10b6fa85044e1869]::panic::unwind_safe::AssertUnwindSafe<test[826cbc6ef54ab466]::run_test_in_process::{closure#0}>>
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/panicking.rs:544:19
[INFO] [stdout]   30:     0x585816167deb - std[b80a194dd3c418bb]::panic::catch_unwind::<core[10b6fa85044e1869]::panic::unwind_safe::AssertUnwindSafe<test[826cbc6ef54ab466]::run_test_in_process::{closure#0}>, core[10b6fa85044e1869]::result::Result<(), alloc[dd269455e567d8e9]::string::String>>
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/panic.rs:359:14
[INFO] [stdout]   31:     0x585816167deb - test[826cbc6ef54ab466]::run_test_in_process
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/test/src/lib.rs:686:27
[INFO] [stdout]   32:     0x585816167deb - test[826cbc6ef54ab466]::run_test::{closure#0}
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/test/src/lib.rs:607:43
[INFO] [stdout]   33:     0x585816163504 - test[826cbc6ef54ab466]::run_test::{closure#1}
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/test/src/lib.rs:637:41
[INFO] [stdout]   34:     0x585816163504 - std[b80a194dd3c418bb]::sys::backtrace::__rust_begin_short_backtrace::<test[826cbc6ef54ab466]::run_test::{closure#1}, ()>
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/sys/backtrace.rs:166:18
[INFO] [stdout]   35:     0x58581616a9f2 - std[b80a194dd3c418bb]::thread::lifecycle::spawn_unchecked::<test[826cbc6ef54ab466]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/thread/lifecycle.rs:91:13
[INFO] [stdout]   36:     0x58581616a9f2 - <core[10b6fa85044e1869]::panic::unwind_safe::AssertUnwindSafe<std[b80a194dd3c418bb]::thread::lifecycle::spawn_unchecked<test[826cbc6ef54ab466]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}> as core[10b6fa85044e1869]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   37:     0x58581616a9f2 - std[b80a194dd3c418bb]::panicking::catch_unwind::do_call::<core[10b6fa85044e1869]::panic::unwind_safe::AssertUnwindSafe<std[b80a194dd3c418bb]::thread::lifecycle::spawn_unchecked<test[826cbc6ef54ab466]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/panicking.rs:581:40
[INFO] [stdout]   38:     0x58581616a9f2 - std[b80a194dd3c418bb]::panicking::catch_unwind::<(), core[10b6fa85044e1869]::panic::unwind_safe::AssertUnwindSafe<std[b80a194dd3c418bb]::thread::lifecycle::spawn_unchecked<test[826cbc6ef54ab466]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>>
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/panicking.rs:544:19
[INFO] [stdout]   39:     0x58581616a9f2 - std[b80a194dd3c418bb]::panic::catch_unwind::<core[10b6fa85044e1869]::panic::unwind_safe::AssertUnwindSafe<std[b80a194dd3c418bb]::thread::lifecycle::spawn_unchecked<test[826cbc6ef54ab466]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/panic.rs:359:14
[INFO] [stdout]   40:     0x58581616a9f2 - std[b80a194dd3c418bb]::thread::lifecycle::spawn_unchecked::<test[826cbc6ef54ab466]::run_test::{closure#1}, ()>::{closure#1}
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/thread/lifecycle.rs:89:26
[INFO] [stdout]   41:     0x58581616a9f2 - <std[b80a194dd3c418bb]::thread::lifecycle::spawn_unchecked<test[826cbc6ef54ab466]::run_test::{closure#1}, ()>::{closure#1} as core[10b6fa85044e1869]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x5858161d172f - <alloc[dd269455e567d8e9]::boxed::Box<dyn core[10b6fa85044e1869]::ops::function::FnOnce<(), Output = ()> + core[10b6fa85044e1869]::marker::Send> as core[10b6fa85044e1869]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/alloc/src/boxed.rs:2240:9
[INFO] [stdout]   43:     0x5858161d172f - <std[b80a194dd3c418bb]::sys::thread::unix::Thread>::new::thread_start
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/sys/thread/unix.rs:118:17
[INFO] [stdout]   44:     0x70f8616fcaa4 - <unknown>
[INFO] [stdout]   45:     0x70f861789a64 - clone
[INFO] [stdout]   46:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     pointers::refcell::tests::it_sends_an_over_75_percent_warning_message
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin hello-world`
[INFO] running `Command { std: "docker" "inspect" "e86a95053e1b1d7a3e91501ec03357ab69ba6eaa75f7a9deee3e997b9966feaa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e86a95053e1b1d7a3e91501ec03357ab69ba6eaa75f7a9deee3e997b9966feaa", kill_on_drop: false }`
[INFO] [stdout] e86a95053e1b1d7a3e91501ec03357ab69ba6eaa75f7a9deee3e997b9966feaa
