[INFO] cloning repository https://github.com/h3ndr4kw/mydemo-rust-dasar
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/h3ndr4kw/mydemo-rust-dasar" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fh3ndr4kw%2Fmydemo-rust-dasar", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fh3ndr4kw%2Fmydemo-rust-dasar'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6b7125ba5fb476c2e9541ee31e8a244ebca23b89
[INFO] checking h3ndr4kw/mydemo-rust-dasar against master#82310651b93a594a3fd69015e1562186a080d94c for pr-145770
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fh3ndr4kw%2Fmydemo-rust-dasar" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/h3ndr4kw/mydemo-rust-dasar
[INFO] finished tweaking git repo https://github.com/h3ndr4kw/mydemo-rust-dasar
[INFO] tweaked toml for git repo https://github.com/h3ndr4kw/mydemo-rust-dasar written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/h3ndr4kw/mydemo-rust-dasar on toolchain 82310651b93a594a3fd69015e1562186a080d94c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+82310651b93a594a3fd69015e1562186a080d94c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/h3ndr4kw/mydemo-rust-dasar 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" "+82310651b93a594a3fd69015e1562186a080d94c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+82310651b93a594a3fd69015e1562186a080d94c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5dfd4729692e28a3928e915ebf33ae7ff447acf9f8733e0ea80c949ad3e55b65
[INFO] running `Command { std: "docker" "start" "-a" "5dfd4729692e28a3928e915ebf33ae7ff447acf9f8733e0ea80c949ad3e55b65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5dfd4729692e28a3928e915ebf33ae7ff447acf9f8733e0ea80c949ad3e55b65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5dfd4729692e28a3928e915ebf33ae7ff447acf9f8733e0ea80c949ad3e55b65", kill_on_drop: false }`
[INFO] [stdout] 5dfd4729692e28a3928e915ebf33ae7ff447acf9f8733e0ea80c949ad3e55b65
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+82310651b93a594a3fd69015e1562186a080d94c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cf7d5211d90edc5ceaeacf78aac92240f225175aa29995aded1bb0e2ea652083
[INFO] running `Command { std: "docker" "start" "-a" "cf7d5211d90edc5ceaeacf78aac92240f225175aa29995aded1bb0e2ea652083", kill_on_drop: false }`
[INFO] [stderr]     Checking mydemo-rust-dasar v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::os::linux::raw::stat`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::os::linux::raw::stat;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated struct `std::os::linux::raw::stat`: these type aliases are no longer supported by the standard library, the `libc` crate on crates.io should be used instead for the correct definitions
[INFO] [stdout]  --> src/main.rs:1:26
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::os::linux::raw::stat;
[INFO] [stdout]   |                          ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::os::linux::raw::stat`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::os::linux::raw::stat;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated struct `std::os::linux::raw::stat`: these type aliases are no longer supported by the standard library, the `libc` crate on crates.io should be used instead for the correct definitions
[INFO] [stdout]  --> src/main.rs:1:26
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::os::linux::raw::stat;
[INFO] [stdout]   |                          ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/iterator_demo.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let mut iterator = array.iter();
[INFO] [stdout]   |         ----^^^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `r` is assigned to, but never used
[INFO] [stdout]  --> src/lifetime_demo.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let r; // r tidak diinisialisasi
[INFO] [stdout]   |         ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: consider using `_r` instead
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `r` is never read
[INFO] [stdout]  --> src/lifetime_demo.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |         r = &x; // r mencoba mereferensikan x
[INFO] [stdout]   |         ^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/pattern_matching_demo.rs:93:9
[INFO] [stdout]    |
[INFO] [stdout] 90 |         GeoPoint(lat, long) => {
[INFO] [stdout]    |         ------------------- matches any value
[INFO] [stdout] ...
[INFO] [stdout] 93 |         _ => {
[INFO] [stdout]    |         ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `laptop`
[INFO] [stdout]   --> src/multiple_ownership_demo.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let laptop: Brand = Brand::Of(
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_laptop`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `smartphone`
[INFO] [stdout]   --> src/multiple_ownership_demo.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |         let smartphone: Brand = Brand::Of(
[INFO] [stdout]    |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_smartphone`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_closure` is never used
[INFO] [stdout]  --> src/closure_demo.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn test_closure() {
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_with_filter` is never used
[INFO] [stdout]  --> src/closure_demo.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn print_with_filter(value: String, filter: fn(String) -> String) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_closure_with_filter` is never used
[INFO] [stdout]   --> src/closure_demo.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn test_closure_with_filter() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `to_uppercase` is never used
[INFO] [stdout]   --> src/closure_demo.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn to_uppercase(value: String) -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_function_as_closure` is never used
[INFO] [stdout]   --> src/closure_demo.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub fn test_function_as_closure() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_closure_scope` is never used
[INFO] [stdout]   --> src/closure_demo.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn test_closure_scope() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Counter` is never constructed
[INFO] [stdout]   --> src/closure_demo.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 47 | struct Counter {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `increment` are never used
[INFO] [stdout]   --> src/closure_demo.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 51 | impl Counter {
[INFO] [stdout]    | ------------ associated items in this implementation
[INFO] [stdout] 52 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 56 |     fn increment(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_closure_scope_with_struct` is never used
[INFO] [stdout]   --> src/closure_demo.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub fn test_closure_scope_with_struct() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Apple` is never constructed
[INFO] [stdout]  --> src/comparing_demo.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Apple {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/comparing_demo.rs:64:8
[INFO] [stdout]    |
[INFO] [stdout] 64 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Level` is never used
[INFO] [stdout]  --> src/enum_demo.rs:2:6
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum Level {
[INFO] [stdout]   |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Payment` is never used
[INFO] [stdout]  --> src/enum_demo.rs:8:6
[INFO] [stdout]   |
[INFO] [stdout] 8 | enum Payment {
[INFO] [stdout]   |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `pay` is never used
[INFO] [stdout]   --> src/enum_demo.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl Payment  {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] 15 |     fn pay(&self, amount: u32) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_enum` is never used
[INFO] [stdout]   --> src/enum_demo.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub fn test_enum() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_payment` is never used
[INFO] [stdout]   --> src/enum_demo.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn test_payment() {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `connect_database` is never used
[INFO] [stdout]  --> src/error_handling_demo.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn connect_database(host: Option<String>) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_unrecoverable_error` is never used
[INFO] [stdout]  --> src/error_handling_demo.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn test_unrecoverable_error() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `connect_cache` is never used
[INFO] [stdout]   --> src/error_handling_demo.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn connect_cache(host: Option<String>) -> Result<String, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_recoverable_error` is never used
[INFO] [stdout]   --> src/error_handling_demo.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn test_recoverable_error() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `connect_email` is never used
[INFO] [stdout]   --> src/error_handling_demo.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn connect_email(host: Option<String>) -> Result<String, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `connect_application` is never used
[INFO] [stdout]   --> src/error_handling_demo.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn connect_application(host: Option<String>) -> Result<String, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_connect_application` is never used
[INFO] [stdout]   --> src/error_handling_demo.rs:64:8
[INFO] [stdout]    |
[INFO] [stdout] 64 | pub fn test_connect_application() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Category` is never constructed
[INFO] [stdout]  --> src/formating_demo.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Category {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_formating_demo` is never used
[INFO] [stdout]   --> src/formating_demo.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn test_formating_demo() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]  --> src/generic_demo.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Point<T> {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]  --> src/generic_demo.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_iterator` is never used
[INFO] [stdout]  --> src/iterator_demo.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn test_iterator() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_iterator_method` is never used
[INFO] [stdout]   --> src/iterator_demo.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub fn test_iterator_method() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_dangling_reference` is never used
[INFO] [stdout]  --> src/lifetime_demo.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn test_dangling_reference() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest` is never used
[INFO] [stdout]   --> src/lifetime_demo.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn longest<'a>(value1: &'a str, value2: &'a str) -> &'a str {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_longest` is never used
[INFO] [stdout]   --> src/lifetime_demo.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub fn test_longest() {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_lifetime_annotation_dangling_reference` is never used
[INFO] [stdout]   --> src/lifetime_demo.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn test_lifetime_annotation_dangling_reference() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest_student_name` is never used
[INFO] [stdout]   --> src/lifetime_demo.rs:42:4
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn longest_student_name<'a, 'b>(student1: &Student<'a, 'b>, student2: &Student<'a, 'b>) -> &'a str {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Student` is never constructed
[INFO] [stdout]   --> src/lifetime_demo.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 50 | struct Student<'a, 'b> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `longest_name` is never used
[INFO] [stdout]   --> src/lifetime_demo.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | impl<'a, 'b> Student<'a, 'b> {
[INFO] [stdout]    | ---------------------------- method in this implementation
[INFO] [stdout] 56 |     fn longest_name(&self, other: &Student<'a, 'b>) -> &'a str {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_student` is never used
[INFO] [stdout]   --> src/lifetime_demo.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub fn test_student() {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Teacher` is never constructed
[INFO] [stdout]   --> src/lifetime_demo.rs:86:8
[INFO] [stdout]    |
[INFO] [stdout] 86 | struct Teacher<'a, ID> where ID: Ord {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_lifetime_annotation_generic_struct` is never used
[INFO] [stdout]   --> src/lifetime_demo.rs:91:8
[INFO] [stdout]    |
[INFO] [stdout] 91 | pub fn test_lifetime_annotation_generic_struct() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_hash_map` is never used
[INFO] [stdout]  --> src/maps_demo.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn test_hash_map() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_btree_map` is never used
[INFO] [stdout]   --> src/maps_demo.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn test_btree_map() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `double` is never used
[INFO] [stdout]  --> src/option_values_demo.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn double(x: Option<i32>) -> Option<i32> {
[INFO] [stdout]   |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]  --> src/option_values_demo.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `another_double` is never used
[INFO] [stdout]   --> src/option_values_demo.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn another_double(x: Option<i32>) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Apple` is never constructed
[INFO] [stdout]  --> src/overloadable_operator_demo.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Apple {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/overloadable_operator_demo.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Level` is never used
[INFO] [stdout]  --> src/pattern_matching_demo.rs:2:6
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum Level {
[INFO] [stdout]   |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Payment` is never used
[INFO] [stdout]  --> src/pattern_matching_demo.rs:8:6
[INFO] [stdout]   |
[INFO] [stdout] 8 | enum Payment {
[INFO] [stdout]   |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `pay` is never used
[INFO] [stdout]   --> src/pattern_matching_demo.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl Payment  {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] 15 |     fn pay(&self, amount: u32) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_enum` is never used
[INFO] [stdout]   --> src/pattern_matching_demo.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn test_enum() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_payment` is never used
[INFO] [stdout]   --> src/pattern_matching_demo.rs:40:8
[INFO] [stdout]    |
[INFO] [stdout] 40 | pub fn test_payment() {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_match_value` is never used
[INFO] [stdout]   --> src/pattern_matching_demo.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | pub fn test_match_value() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_multiple_patterns` is never used
[INFO] [stdout]   --> src/pattern_matching_demo.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 58 | pub fn test_multiple_patterns() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_range_pattern` is never used
[INFO] [stdout]   --> src/pattern_matching_demo.rs:68:8
[INFO] [stdout]    |
[INFO] [stdout] 68 | pub fn test_range_pattern() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `GeoPoint` is never constructed
[INFO] [stdout]   --> src/pattern_matching_demo.rs:78:8
[INFO] [stdout]    |
[INFO] [stdout] 78 | struct GeoPoint(f64, f64);
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/pattern_matching_demo.rs:81:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | impl GeoPoint {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 81 |     fn new(long: f64, lat: f64) -> GeoPoint {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_destruct_pattern` is never used
[INFO] [stdout]   --> src/pattern_matching_demo.rs:86:8
[INFO] [stdout]    |
[INFO] [stdout] 86 | pub fn test_destruct_pattern() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]   --> src/pattern_matching_demo.rs:99:8
[INFO] [stdout]    |
[INFO] [stdout] 99 | struct Person {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_destruct_pattern2` is never used
[INFO] [stdout]    --> src/pattern_matching_demo.rs:106:8
[INFO] [stdout]     |
[INFO] [stdout] 106 | pub fn test_destruct_pattern2() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_match_expression` is never used
[INFO] [stdout]    --> src/pattern_matching_demo.rs:120:8
[INFO] [stdout]     |
[INFO] [stdout] 120 | pub fn test_match_expression() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_vector` is never used
[INFO] [stdout]  --> src/sequences_demo.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn test_vector() {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_vec_deque` is never used
[INFO] [stdout]   --> src/sequences_demo.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub fn test_vec_deque() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_linked_list` is never used
[INFO] [stdout]   --> src/sequences_demo.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub fn test_linked_list() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_hash_set` is never used
[INFO] [stdout]  --> src/sets_demo.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn test_hash_set() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_btree_set` is never used
[INFO] [stdout]   --> src/sets_demo.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn test_btree_set() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_string_manipulation` is never used
[INFO] [stdout]  --> src/string_manipulation_demo.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn test_string_manipulation() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]  --> src/struct_demo.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Person {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `say_hello` is never used
[INFO] [stdout]  --> src/struct_demo.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | impl Person {
[INFO] [stdout]   | ----------- method in this implementation
[INFO] [stdout] 8 |     fn say_hello(&self) {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_person` is never used
[INFO] [stdout]   --> src/struct_demo.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn print_person(person: &Person) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `struct_person` is never used
[INFO] [stdout]   --> src/struct_demo.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn struct_person() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/struct_demo.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `GeoPoint` is never constructed
[INFO] [stdout]   --> src/struct_demo.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | struct GeoPoint(f64, f64);
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/struct_demo.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | impl GeoPoint {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 57 |     fn new(long: f64, lat: f64) -> GeoPoint {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `tuple_struct` is never used
[INFO] [stdout]   --> src/struct_demo.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub fn tuple_struct() {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Nothing` is never constructed
[INFO] [stdout]   --> src/struct_demo.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 67 | struct Nothing;
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_nothing` is never used
[INFO] [stdout]   --> src/struct_demo.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub fn test_nothing() {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_method` is never used
[INFO] [stdout]   --> src/struct_demo.rs:74:8
[INFO] [stdout]    |
[INFO] [stdout] 74 | pub fn test_method() {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_method_new` is never used
[INFO] [stdout]   --> src/struct_demo.rs:84:8
[INFO] [stdout]    |
[INFO] [stdout] 84 | pub fn test_method_new() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `CanSayHello` is never used
[INFO] [stdout]  --> src/trait_demo.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | trait CanSayHello {
[INFO] [stdout]   |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `CanSayGoodbye` is never used
[INFO] [stdout]  --> src/trait_demo.rs:6:7
[INFO] [stdout]   |
[INFO] [stdout] 6 | trait CanSayGoodbye {
[INFO] [stdout]   |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]   --> src/trait_demo.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Person {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/trait_demo.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 50 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Company` is never constructed
[INFO] [stdout]  --> src/attributes_demo.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Company {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_attribute_debug` is never used
[INFO] [stdout]  --> src/attributes_demo.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn test_attribute_debug() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `text_box` is never used
[INFO] [stdout]  --> src/smart_pointer_demo.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn text_box() {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `display_number` is never used
[INFO] [stdout]  --> src/smart_pointer_demo.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn display_number(value: i32) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `display_number_reference` is never used
[INFO] [stdout]   --> src/smart_pointer_demo.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn display_number_reference(value: &i32) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ProductCategory` is never used
[INFO] [stdout]   --> src/smart_pointer_demo.rs:18:6
[INFO] [stdout]    |
[INFO] [stdout] 18 | enum ProductCategory {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_box_enum` is never used
[INFO] [stdout]   --> src/smart_pointer_demo.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn test_box_enum() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_dereference` is never used
[INFO] [stdout]  --> src/dereference_demo.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn test_dereference() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyValue` is never constructed
[INFO] [stdout]   --> src/dereference_demo.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct MyValue<T> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_deref` is never used
[INFO] [stdout]   --> src/dereference_demo.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub fn test_deref() {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `say_hello` is never used
[INFO] [stdout]   --> src/dereference_demo.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn say_hello(name: &String) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_deref_coercion` is never used
[INFO] [stdout]   --> src/dereference_demo.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub fn test_deref_coercion() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Book` is never constructed
[INFO] [stdout]  --> src/cleanup_demo.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Book {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_drop` is never used
[INFO] [stdout]   --> src/cleanup_demo.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub fn test_drop() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> src/multiple_ownership_demo.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 |     Of(String, Rc<Brand>),
[INFO] [stdout]   |     -- ^^^^^^  ^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     fields in this variant
[INFO] [stdout]   |
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]   |
[INFO] [stdout] 9 -     Of(String, Rc<Brand>),
[INFO] [stdout] 9 +     Of((), ()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/iterator_demo.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let mut iterator = array.iter();
[INFO] [stdout]   |         ----^^^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `r` is assigned to, but never used
[INFO] [stdout]  --> src/lifetime_demo.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let r; // r tidak diinisialisasi
[INFO] [stdout]   |         ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: consider using `_r` instead
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `r` is never read
[INFO] [stdout]  --> src/lifetime_demo.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |         r = &x; // r mencoba mereferensikan x
[INFO] [stdout]   |         ^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/pattern_matching_demo.rs:93:9
[INFO] [stdout]    |
[INFO] [stdout] 90 |         GeoPoint(lat, long) => {
[INFO] [stdout]    |         ------------------- matches any value
[INFO] [stdout] ...
[INFO] [stdout] 93 |         _ => {
[INFO] [stdout]    |         ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `laptop`
[INFO] [stdout]   --> src/multiple_ownership_demo.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let laptop: Brand = Brand::Of(
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_laptop`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `smartphone`
[INFO] [stdout]   --> src/multiple_ownership_demo.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |         let smartphone: Brand = Brand::Of(
[INFO] [stdout]    |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_smartphone`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_closure` is never used
[INFO] [stdout]  --> src/closure_demo.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn test_closure() {
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_with_filter` is never used
[INFO] [stdout]  --> src/closure_demo.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn print_with_filter(value: String, filter: fn(String) -> String) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_closure_with_filter` is never used
[INFO] [stdout]   --> src/closure_demo.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn test_closure_with_filter() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `to_uppercase` is never used
[INFO] [stdout]   --> src/closure_demo.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn to_uppercase(value: String) -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_function_as_closure` is never used
[INFO] [stdout]   --> src/closure_demo.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub fn test_function_as_closure() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_closure_scope` is never used
[INFO] [stdout]   --> src/closure_demo.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn test_closure_scope() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Counter` is never constructed
[INFO] [stdout]   --> src/closure_demo.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 47 | struct Counter {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `increment` are never used
[INFO] [stdout]   --> src/closure_demo.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 51 | impl Counter {
[INFO] [stdout]    | ------------ associated items in this implementation
[INFO] [stdout] 52 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 56 |     fn increment(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_closure_scope_with_struct` is never used
[INFO] [stdout]   --> src/closure_demo.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub fn test_closure_scope_with_struct() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Apple` is never constructed
[INFO] [stdout]  --> src/comparing_demo.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Apple {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/comparing_demo.rs:64:8
[INFO] [stdout]    |
[INFO] [stdout] 64 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Level` is never used
[INFO] [stdout]  --> src/enum_demo.rs:2:6
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum Level {
[INFO] [stdout]   |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Payment` is never used
[INFO] [stdout]  --> src/enum_demo.rs:8:6
[INFO] [stdout]   |
[INFO] [stdout] 8 | enum Payment {
[INFO] [stdout]   |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `pay` is never used
[INFO] [stdout]   --> src/enum_demo.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl Payment  {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] 15 |     fn pay(&self, amount: u32) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_enum` is never used
[INFO] [stdout]   --> src/enum_demo.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub fn test_enum() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_payment` is never used
[INFO] [stdout]   --> src/enum_demo.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn test_payment() {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `connect_database` is never used
[INFO] [stdout]  --> src/error_handling_demo.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn connect_database(host: Option<String>) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_unrecoverable_error` is never used
[INFO] [stdout]  --> src/error_handling_demo.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn test_unrecoverable_error() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `connect_cache` is never used
[INFO] [stdout]   --> src/error_handling_demo.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn connect_cache(host: Option<String>) -> Result<String, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_recoverable_error` is never used
[INFO] [stdout]   --> src/error_handling_demo.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn test_recoverable_error() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `connect_email` is never used
[INFO] [stdout]   --> src/error_handling_demo.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn connect_email(host: Option<String>) -> Result<String, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `connect_application` is never used
[INFO] [stdout]   --> src/error_handling_demo.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn connect_application(host: Option<String>) -> Result<String, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_connect_application` is never used
[INFO] [stdout]   --> src/error_handling_demo.rs:64:8
[INFO] [stdout]    |
[INFO] [stdout] 64 | pub fn test_connect_application() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Category` is never constructed
[INFO] [stdout]  --> src/formating_demo.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Category {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_formating_demo` is never used
[INFO] [stdout]   --> src/formating_demo.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn test_formating_demo() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]  --> src/generic_demo.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Point<T> {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]  --> src/generic_demo.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_iterator` is never used
[INFO] [stdout]  --> src/iterator_demo.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn test_iterator() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_iterator_method` is never used
[INFO] [stdout]   --> src/iterator_demo.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub fn test_iterator_method() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_dangling_reference` is never used
[INFO] [stdout]  --> src/lifetime_demo.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn test_dangling_reference() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest` is never used
[INFO] [stdout]   --> src/lifetime_demo.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn longest<'a>(value1: &'a str, value2: &'a str) -> &'a str {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_longest` is never used
[INFO] [stdout]   --> src/lifetime_demo.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub fn test_longest() {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_lifetime_annotation_dangling_reference` is never used
[INFO] [stdout]   --> src/lifetime_demo.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn test_lifetime_annotation_dangling_reference() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest_student_name` is never used
[INFO] [stdout]   --> src/lifetime_demo.rs:42:4
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn longest_student_name<'a, 'b>(student1: &Student<'a, 'b>, student2: &Student<'a, 'b>) -> &'a str {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Student` is never constructed
[INFO] [stdout]   --> src/lifetime_demo.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 50 | struct Student<'a, 'b> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `longest_name` is never used
[INFO] [stdout]   --> src/lifetime_demo.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | impl<'a, 'b> Student<'a, 'b> {
[INFO] [stdout]    | ---------------------------- method in this implementation
[INFO] [stdout] 56 |     fn longest_name(&self, other: &Student<'a, 'b>) -> &'a str {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_student` is never used
[INFO] [stdout]   --> src/lifetime_demo.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub fn test_student() {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Teacher` is never constructed
[INFO] [stdout]   --> src/lifetime_demo.rs:86:8
[INFO] [stdout]    |
[INFO] [stdout] 86 | struct Teacher<'a, ID> where ID: Ord {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_lifetime_annotation_generic_struct` is never used
[INFO] [stdout]   --> src/lifetime_demo.rs:91:8
[INFO] [stdout]    |
[INFO] [stdout] 91 | pub fn test_lifetime_annotation_generic_struct() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_hash_map` is never used
[INFO] [stdout]  --> src/maps_demo.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn test_hash_map() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_btree_map` is never used
[INFO] [stdout]   --> src/maps_demo.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn test_btree_map() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `double` is never used
[INFO] [stdout]  --> src/option_values_demo.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn double(x: Option<i32>) -> Option<i32> {
[INFO] [stdout]   |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]  --> src/option_values_demo.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `another_double` is never used
[INFO] [stdout]   --> src/option_values_demo.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn another_double(x: Option<i32>) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Apple` is never constructed
[INFO] [stdout]  --> src/overloadable_operator_demo.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Apple {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/overloadable_operator_demo.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Level` is never used
[INFO] [stdout]  --> src/pattern_matching_demo.rs:2:6
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum Level {
[INFO] [stdout]   |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Payment` is never used
[INFO] [stdout]  --> src/pattern_matching_demo.rs:8:6
[INFO] [stdout]   |
[INFO] [stdout] 8 | enum Payment {
[INFO] [stdout]   |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `pay` is never used
[INFO] [stdout]   --> src/pattern_matching_demo.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl Payment  {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] 15 |     fn pay(&self, amount: u32) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_enum` is never used
[INFO] [stdout]   --> src/pattern_matching_demo.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn test_enum() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_payment` is never used
[INFO] [stdout]   --> src/pattern_matching_demo.rs:40:8
[INFO] [stdout]    |
[INFO] [stdout] 40 | pub fn test_payment() {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_match_value` is never used
[INFO] [stdout]   --> src/pattern_matching_demo.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | pub fn test_match_value() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_multiple_patterns` is never used
[INFO] [stdout]   --> src/pattern_matching_demo.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 58 | pub fn test_multiple_patterns() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_range_pattern` is never used
[INFO] [stdout]   --> src/pattern_matching_demo.rs:68:8
[INFO] [stdout]    |
[INFO] [stdout] 68 | pub fn test_range_pattern() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `GeoPoint` is never constructed
[INFO] [stdout]   --> src/pattern_matching_demo.rs:78:8
[INFO] [stdout]    |
[INFO] [stdout] 78 | struct GeoPoint(f64, f64);
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/pattern_matching_demo.rs:81:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | impl GeoPoint {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 81 |     fn new(long: f64, lat: f64) -> GeoPoint {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_destruct_pattern` is never used
[INFO] [stdout]   --> src/pattern_matching_demo.rs:86:8
[INFO] [stdout]    |
[INFO] [stdout] 86 | pub fn test_destruct_pattern() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]   --> src/pattern_matching_demo.rs:99:8
[INFO] [stdout]    |
[INFO] [stdout] 99 | struct Person {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_destruct_pattern2` is never used
[INFO] [stdout]    --> src/pattern_matching_demo.rs:106:8
[INFO] [stdout]     |
[INFO] [stdout] 106 | pub fn test_destruct_pattern2() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_match_expression` is never used
[INFO] [stdout]    --> src/pattern_matching_demo.rs:120:8
[INFO] [stdout]     |
[INFO] [stdout] 120 | pub fn test_match_expression() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_vector` is never used
[INFO] [stdout]  --> src/sequences_demo.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn test_vector() {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_vec_deque` is never used
[INFO] [stdout]   --> src/sequences_demo.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub fn test_vec_deque() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_linked_list` is never used
[INFO] [stdout]   --> src/sequences_demo.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub fn test_linked_list() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_hash_set` is never used
[INFO] [stdout]  --> src/sets_demo.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn test_hash_set() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_btree_set` is never used
[INFO] [stdout]   --> src/sets_demo.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn test_btree_set() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_string_manipulation` is never used
[INFO] [stdout]  --> src/string_manipulation_demo.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn test_string_manipulation() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]  --> src/struct_demo.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Person {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `say_hello` is never used
[INFO] [stdout]  --> src/struct_demo.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | impl Person {
[INFO] [stdout]   | ----------- method in this implementation
[INFO] [stdout] 8 |     fn say_hello(&self) {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_person` is never used
[INFO] [stdout]   --> src/struct_demo.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn print_person(person: &Person) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `struct_person` is never used
[INFO] [stdout]   --> src/struct_demo.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn struct_person() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/struct_demo.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `GeoPoint` is never constructed
[INFO] [stdout]   --> src/struct_demo.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | struct GeoPoint(f64, f64);
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/struct_demo.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | impl GeoPoint {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 57 |     fn new(long: f64, lat: f64) -> GeoPoint {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `tuple_struct` is never used
[INFO] [stdout]   --> src/struct_demo.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub fn tuple_struct() {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Nothing` is never constructed
[INFO] [stdout]   --> src/struct_demo.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 67 | struct Nothing;
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_nothing` is never used
[INFO] [stdout]   --> src/struct_demo.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub fn test_nothing() {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_method` is never used
[INFO] [stdout]   --> src/struct_demo.rs:74:8
[INFO] [stdout]    |
[INFO] [stdout] 74 | pub fn test_method() {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_method_new` is never used
[INFO] [stdout]   --> src/struct_demo.rs:84:8
[INFO] [stdout]    |
[INFO] [stdout] 84 | pub fn test_method_new() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `CanSayHello` is never used
[INFO] [stdout]  --> src/trait_demo.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | trait CanSayHello {
[INFO] [stdout]   |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `CanSayGoodbye` is never used
[INFO] [stdout]  --> src/trait_demo.rs:6:7
[INFO] [stdout]   |
[INFO] [stdout] 6 | trait CanSayGoodbye {
[INFO] [stdout]   |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]   --> src/trait_demo.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Person {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/trait_demo.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 50 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Company` is never constructed
[INFO] [stdout]  --> src/attributes_demo.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Company {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_attribute_debug` is never used
[INFO] [stdout]  --> src/attributes_demo.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn test_attribute_debug() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `text_box` is never used
[INFO] [stdout]  --> src/smart_pointer_demo.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn text_box() {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `display_number` is never used
[INFO] [stdout]  --> src/smart_pointer_demo.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn display_number(value: i32) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `display_number_reference` is never used
[INFO] [stdout]   --> src/smart_pointer_demo.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn display_number_reference(value: &i32) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ProductCategory` is never used
[INFO] [stdout]   --> src/smart_pointer_demo.rs:18:6
[INFO] [stdout]    |
[INFO] [stdout] 18 | enum ProductCategory {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_box_enum` is never used
[INFO] [stdout]   --> src/smart_pointer_demo.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn test_box_enum() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_dereference` is never used
[INFO] [stdout]  --> src/dereference_demo.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn test_dereference() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyValue` is never constructed
[INFO] [stdout]   --> src/dereference_demo.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct MyValue<T> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_deref` is never used
[INFO] [stdout]   --> src/dereference_demo.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub fn test_deref() {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `say_hello` is never used
[INFO] [stdout]   --> src/dereference_demo.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn say_hello(name: &String) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_deref_coercion` is never used
[INFO] [stdout]   --> src/dereference_demo.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub fn test_deref_coercion() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Book` is never constructed
[INFO] [stdout]  --> src/cleanup_demo.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Book {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_drop` is never used
[INFO] [stdout]   --> src/cleanup_demo.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub fn test_drop() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> src/multiple_ownership_demo.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 |     Of(String, Rc<Brand>),
[INFO] [stdout]   |     -- ^^^^^^  ^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     fields in this variant
[INFO] [stdout]   |
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]   |
[INFO] [stdout] 9 -     Of(String, Rc<Brand>),
[INFO] [stdout] 9 +     Of((), ()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.70s
[INFO] running `Command { std: "docker" "inspect" "cf7d5211d90edc5ceaeacf78aac92240f225175aa29995aded1bb0e2ea652083", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf7d5211d90edc5ceaeacf78aac92240f225175aa29995aded1bb0e2ea652083", kill_on_drop: false }`
[INFO] [stdout] cf7d5211d90edc5ceaeacf78aac92240f225175aa29995aded1bb0e2ea652083
