[INFO] cloning repository https://github.com/Sirotyann/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/Sirotyann/rust_hello_world" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSirotyann%2Frust_hello_world", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSirotyann%2Frust_hello_world'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4b8952ebe13a320cbe65799925cf85d91be6b627
[INFO] checking Sirotyann/rust_hello_world against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSirotyann%2Frust_hello_world" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Sirotyann/rust_hello_world on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Sirotyann/rust_hello_world
[INFO] finished tweaking git repo https://github.com/Sirotyann/rust_hello_world
[INFO] tweaked toml for git repo https://github.com/Sirotyann/rust_hello_world written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/Sirotyann/rust_hello_world already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2a11e7755ee1770e7accbed8929484eb10c9c132a970b2f1f69a05fec4dc9b6c
[INFO] running `Command { std: "docker" "start" "-a" "2a11e7755ee1770e7accbed8929484eb10c9c132a970b2f1f69a05fec4dc9b6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2a11e7755ee1770e7accbed8929484eb10c9c132a970b2f1f69a05fec4dc9b6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a11e7755ee1770e7accbed8929484eb10c9c132a970b2f1f69a05fec4dc9b6c", kill_on_drop: false }`
[INFO] [stdout] 2a11e7755ee1770e7accbed8929484eb10c9c132a970b2f1f69a05fec4dc9b6c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5cd5b92c8b6125201c056f04ded4dd6779257431127122ba4f95cf9f2570754b
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "5cd5b92c8b6125201c056f04ded4dd6779257431127122ba4f95cf9f2570754b", kill_on_drop: false }`
[INFO] [stderr]     Checking rust_hello_world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/basic/pointers.rs:146:9
[INFO] [stdout]     |
[INFO] [stdout] 146 |     let b = Cons(3, Rc::clone(&a));
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]    --> src/basic/pointers.rs:148:9
[INFO] [stdout]     |
[INFO] [stdout] 148 |     let c = 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: `j`
[INFO] [stdout]   --> src/basic/threads.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |     for j in 0..10 {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/basic/threads.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 57 |     let mut v = vec![1, 2, 3];
[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: constant is never used: `CON`
[INFO] [stdout]  --> src/basic/variables.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | const CON: &str = "I am a const string.";
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static is never used: `STA`
[INFO] [stdout]  --> src/basic/variables.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | static STA: &str = "I am a static string.";
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]   --> src/basic/variables.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn demo () {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]   --> src/basic/types.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |  pub fn demo() {
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_tuple`
[INFO] [stdout]   --> src/basic/types.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |  fn demo_tuple() {
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_array`
[INFO] [stdout]   --> src/basic/types.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |  fn demo_array() {
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]  --> src/basic/flow.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn demo() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_if`
[INFO] [stdout]   --> src/basic/flow.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn demo_if() {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_loop`
[INFO] [stdout]   --> src/basic/flow.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn demo_loop() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_while`
[INFO] [stdout]   --> src/basic/flow.rs:46:4
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn demo_while() {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_for`
[INFO] [stdout]   --> src/basic/flow.rs:54:4
[INFO] [stdout]    |
[INFO] [stdout] 54 | fn demo_for() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_match`
[INFO] [stdout]   --> src/basic/flow.rs:60:4
[INFO] [stdout]    |
[INFO] [stdout] 60 | fn demo_match (some_u8_value:u8) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]   --> src/basic/ownership.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub fn demo() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `takes_ownership`
[INFO] [stdout]   --> src/basic/ownership.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn takes_ownership(some_string: String) -> String { // some_string comes into scope
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `borrow_mut_ownership`
[INFO] [stdout]   --> src/basic/ownership.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn borrow_mut_ownership(some_string: &mut String) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_scope`
[INFO] [stdout]   --> src/basic/ownership.rs:43:4
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn demo_scope() {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_move`
[INFO] [stdout]   --> src/basic/ownership.rs:51:4
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn demo_move() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_clone`
[INFO] [stdout]   --> src/basic/ownership.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn demo_clone() {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_copy`
[INFO] [stdout]   --> src/basic/ownership.rs:64:4
[INFO] [stdout]    |
[INFO] [stdout] 64 | fn demo_copy() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]  --> src/basic/strings.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn demo() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]   --> src/basic/structs.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub fn demo() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_create`
[INFO] [stdout]   --> src/basic/structs.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn demo_create() -> User {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `age_plus`
[INFO] [stdout]   --> src/basic/structs.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn age_plus(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `build`
[INFO] [stdout]   --> src/basic/structs.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn build(name:String, age:u8) -> User{
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `x`
[INFO] [stdout]   --> src/basic/structs.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 62 |     fn x(&self) -> &T {
[INFO] [stdout]    |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_generic`
[INFO] [stdout]   --> src/basic/structs.rs:67:4
[INFO] [stdout]    |
[INFO] [stdout] 67 | fn demo_generic() {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]   --> src/basic/enums.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub fn demo() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `V4`
[INFO] [stdout]   --> src/basic/enums.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     V4(String),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `V6`
[INFO] [stdout]   --> src/basic/enums.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     V6(String),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_create`
[INFO] [stdout]   --> src/basic/enums.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn demo_create() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `MALE`
[INFO] [stdout]   --> src/basic/enums.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 43 |     MALE, FEMALE
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `FEMALE`
[INFO] [stdout]   --> src/basic/enums.rs:43:11
[INFO] [stdout]    |
[INFO] [stdout] 43 |     MALE, FEMALE
[INFO] [stdout]    |           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `prt`
[INFO] [stdout]   --> src/basic/enums.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 47 |     fn prt(&self) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_fun`
[INFO] [stdout]   --> src/basic/enums.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn demo_fun() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Person`
[INFO] [stdout]   --> src/basic/enums.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 61 | struct Person {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_option`
[INFO] [stdout]   --> src/basic/enums.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn demo_option() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Coin`
[INFO] [stdout]   --> src/basic/enums.rs:87:6
[INFO] [stdout]    |
[INFO] [stdout] 87 | enum Coin {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `value_in_cents`
[INFO] [stdout]   --> src/basic/enums.rs:94:4
[INFO] [stdout]    |
[INFO] [stdout] 94 | fn value_in_cents(coin: Coin) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_match`
[INFO] [stdout]    --> src/basic/enums.rs:103:4
[INFO] [stdout]     |
[INFO] [stdout] 103 | fn demo_match() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_if_let`
[INFO] [stdout]    --> src/basic/enums.rs:110:4
[INFO] [stdout]     |
[INFO] [stdout] 110 | fn demo_if_let(num:Option<u8>) {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]   --> src/basic/functions.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub fn demo () {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_closure`
[INFO] [stdout]   --> src/basic/functions.rs:40:4
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn demo_closure() {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Cacher`
[INFO] [stdout]   --> src/basic/functions.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 52 | struct Cacher<T>
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `value`
[INFO] [stdout]   --> src/basic/functions.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 62 |     fn value(&mut self, arg: u32) -> u32 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_closure_as_param`
[INFO] [stdout]   --> src/basic/functions.rs:74:4
[INFO] [stdout]    |
[INFO] [stdout] 74 | fn demo_closure_as_param() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_capture_env`
[INFO] [stdout]   --> src/basic/functions.rs:84:4
[INFO] [stdout]    |
[INFO] [stdout] 84 | fn demo_capture_env() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]   --> src/basic/traits.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub fn demo() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `create_art`
[INFO] [stdout]   --> src/basic/traits.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn create_art() -> NewsArticle {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `create_tw`
[INFO] [stdout]   --> src/basic/traits.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn create_tw() -> Tweet {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_create`
[INFO] [stdout]   --> src/basic/traits.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn demo_create() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `content`
[INFO] [stdout]   --> src/basic/traits.rs:62:5
[INFO] [stdout]    |
[INFO] [stdout] 62 |     pub content: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `notify`
[INFO] [stdout]   --> src/basic/traits.rs:87:4
[INFO] [stdout]    |
[INFO] [stdout] 87 | fn notify(item: impl Summary) {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_argument`
[INFO] [stdout]   --> src/basic/traits.rs:91:4
[INFO] [stdout]    |
[INFO] [stdout] 91 | fn demo_argument() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `show_summary_and_location`
[INFO] [stdout]    --> src/basic/traits.rs:111:4
[INFO] [stdout]     |
[INFO] [stdout] 111 | fn show_summary_and_location(item: impl Summary + Location) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_multiple_traits`
[INFO] [stdout]    --> src/basic/traits.rs:115:4
[INFO] [stdout]     |
[INFO] [stdout] 115 | fn demo_multiple_traits() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Screen`
[INFO] [stdout]    --> src/basic/traits.rs:125:12
[INFO] [stdout]     |
[INFO] [stdout] 125 | pub struct Screen {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `run`
[INFO] [stdout]    --> src/basic/traits.rs:130:12
[INFO] [stdout]     |
[INFO] [stdout] 130 |     pub fn run(&self) {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_trait_object`
[INFO] [stdout]    --> src/basic/traits.rs:152:4
[INFO] [stdout]     |
[INFO] [stdout] 152 | fn demo_trait_object() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]   --> src/basic/pointers.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub fn demo() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_life_time`
[INFO] [stdout]   --> src/basic/pointers.rs:50:4
[INFO] [stdout]    |
[INFO] [stdout] 50 | fn demo_life_time() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `longest`
[INFO] [stdout]   --> src/basic/pointers.rs:60:4
[INFO] [stdout]    |
[INFO] [stdout] 60 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_box_base`
[INFO] [stdout]   --> src/basic/pointers.rs:69:4
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn demo_box_base() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/basic/pointers.rs:87:8
[INFO] [stdout]    |
[INFO] [stdout] 87 |     fn new(x:T) -> MyBox<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_deref`
[INFO] [stdout]    --> src/basic/pointers.rs:102:4
[INFO] [stdout]     |
[INFO] [stdout] 102 | fn demo_deref() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `hello`
[INFO] [stdout]    --> src/basic/pointers.rs:109:4
[INFO] [stdout]     |
[INFO] [stdout] 109 | fn hello(word: &str) {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_deref_coercion`
[INFO] [stdout]    --> src/basic/pointers.rs:113:4
[INFO] [stdout]     |
[INFO] [stdout] 113 | fn demo_deref_coercion() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_drop`
[INFO] [stdout]    --> src/basic/pointers.rs:127:4
[INFO] [stdout]     |
[INFO] [stdout] 127 | fn demo_drop() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `List`
[INFO] [stdout]    --> src/basic/pointers.rs:138:6
[INFO] [stdout]     |
[INFO] [stdout] 138 | enum List {
[INFO] [stdout]     |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_rc`
[INFO] [stdout]    --> src/basic/pointers.rs:143:4
[INFO] [stdout]     |
[INFO] [stdout] 143 | fn demo_rc() {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]  --> src/basic/generics.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn demo() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `A`
[INFO] [stdout]   --> src/basic/generics.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct A<T> {
[INFO] [stdout]    |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `item`
[INFO] [stdout]   --> src/basic/generics.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn item(&self) -> &SomeTypeName {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_create`
[INFO] [stdout]   --> src/basic/threads.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn demo_create() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_join`
[INFO] [stdout]   --> src/basic/threads.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn demo_join() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_move_keyword`
[INFO] [stdout]   --> src/basic/threads.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn demo_move_keyword() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_channel`
[INFO] [stdout]   --> src/basic/threads.rs:71:4
[INFO] [stdout]    |
[INFO] [stdout] 71 | fn demo_channel() {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_channel_multi_producer`
[INFO] [stdout]   --> src/basic/threads.rs:85:4
[INFO] [stdout]    |
[INFO] [stdout] 85 | fn demo_channel_multi_producer() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]   --> src/collectors/vectors.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub fn demo() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_create`
[INFO] [stdout]   --> src/collectors/vectors.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn demo_create() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_loop`
[INFO] [stdout]   --> src/collectors/vectors.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn demo_loop() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Int`
[INFO] [stdout]   --> src/collectors/vectors.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 53 |     Int(i32),
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Text`
[INFO] [stdout]   --> src/collectors/vectors.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 54 |     Text(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_mul_types`
[INFO] [stdout]   --> src/collectors/vectors.rs:57:4
[INFO] [stdout]    |
[INFO] [stdout] 57 | fn demo_mul_types() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]  --> src/collectors/strings.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn demo() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_create`
[INFO] [stdout]   --> src/collectors/strings.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn demo_create() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_plus`
[INFO] [stdout]   --> src/collectors/strings.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn demo_plus() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_char`
[INFO] [stdout]   --> src/collectors/strings.rs:36:4
[INFO] [stdout]    |
[INFO] [stdout] 36 | fn demo_char() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]   --> src/collectors/maps.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn demo() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_create`
[INFO] [stdout]   --> src/collectors/maps.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn demo_create() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_loop`
[INFO] [stdout]   --> src/collectors/maps.rs:31:4
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn demo_loop() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]  --> src/collectors/linked_list.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn demo() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `List`
[INFO] [stdout]  --> src/feature/cons_list.rs:4:6
[INFO] [stdout]   |
[INFO] [stdout] 4 | enum List {
[INFO] [stdout]   |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/feature/cons_list.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn new() -> List {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `prepend`
[INFO] [stdout]   --> src/feature/cons_list.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn prepend(self, n:i32) -> List {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `stringify`
[INFO] [stdout]   --> src/feature/cons_list.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn stringify(&self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]   --> src/feature/cons_list.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub fn demo() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]  --> src/module_example.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn demo () {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/basic/threads.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 49 |         j.join();  // join up thread to main thread, so make main thread to wait for the current thread resolve
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/basic/threads.rs:67:5
[INFO] [stdout]    |
[INFO] [stdout] 67 |     handler.join();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 103 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/basic/pointers.rs:146:9
[INFO] [stdout]     |
[INFO] [stdout] 146 |     let b = Cons(3, Rc::clone(&a));
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]    --> src/basic/pointers.rs:148:9
[INFO] [stdout]     |
[INFO] [stdout] 148 |     let c = 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: `j`
[INFO] [stdout]   --> src/basic/threads.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |     for j in 0..10 {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/basic/threads.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 57 |     let mut v = vec![1, 2, 3];
[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: constant is never used: `CON`
[INFO] [stdout]  --> src/basic/variables.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | const CON: &str = "I am a const string.";
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static is never used: `STA`
[INFO] [stdout]  --> src/basic/variables.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | static STA: &str = "I am a static string.";
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]   --> src/basic/variables.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn demo () {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]   --> src/basic/types.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |  pub fn demo() {
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_tuple`
[INFO] [stdout]   --> src/basic/types.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |  fn demo_tuple() {
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_array`
[INFO] [stdout]   --> src/basic/types.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |  fn demo_array() {
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]  --> src/basic/flow.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn demo() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_if`
[INFO] [stdout]   --> src/basic/flow.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn demo_if() {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_loop`
[INFO] [stdout]   --> src/basic/flow.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn demo_loop() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_while`
[INFO] [stdout]   --> src/basic/flow.rs:46:4
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn demo_while() {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_for`
[INFO] [stdout]   --> src/basic/flow.rs:54:4
[INFO] [stdout]    |
[INFO] [stdout] 54 | fn demo_for() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_match`
[INFO] [stdout]   --> src/basic/flow.rs:60:4
[INFO] [stdout]    |
[INFO] [stdout] 60 | fn demo_match (some_u8_value:u8) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]   --> src/basic/ownership.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub fn demo() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `takes_ownership`
[INFO] [stdout]   --> src/basic/ownership.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn takes_ownership(some_string: String) -> String { // some_string comes into scope
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `borrow_mut_ownership`
[INFO] [stdout]   --> src/basic/ownership.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn borrow_mut_ownership(some_string: &mut String) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_scope`
[INFO] [stdout]   --> src/basic/ownership.rs:43:4
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn demo_scope() {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_move`
[INFO] [stdout]   --> src/basic/ownership.rs:51:4
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn demo_move() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_clone`
[INFO] [stdout]   --> src/basic/ownership.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn demo_clone() {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_copy`
[INFO] [stdout]   --> src/basic/ownership.rs:64:4
[INFO] [stdout]    |
[INFO] [stdout] 64 | fn demo_copy() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]  --> src/basic/strings.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn demo() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]   --> src/basic/structs.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub fn demo() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_create`
[INFO] [stdout]   --> src/basic/structs.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn demo_create() -> User {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `age_plus`
[INFO] [stdout]   --> src/basic/structs.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn age_plus(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `build`
[INFO] [stdout]   --> src/basic/structs.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn build(name:String, age:u8) -> User{
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `x`
[INFO] [stdout]   --> src/basic/structs.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 62 |     fn x(&self) -> &T {
[INFO] [stdout]    |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_generic`
[INFO] [stdout]   --> src/basic/structs.rs:67:4
[INFO] [stdout]    |
[INFO] [stdout] 67 | fn demo_generic() {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]   --> src/basic/enums.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub fn demo() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `V4`
[INFO] [stdout]   --> src/basic/enums.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     V4(String),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `V6`
[INFO] [stdout]   --> src/basic/enums.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     V6(String),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_create`
[INFO] [stdout]   --> src/basic/enums.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn demo_create() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `MALE`
[INFO] [stdout]   --> src/basic/enums.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 43 |     MALE, FEMALE
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `FEMALE`
[INFO] [stdout]   --> src/basic/enums.rs:43:11
[INFO] [stdout]    |
[INFO] [stdout] 43 |     MALE, FEMALE
[INFO] [stdout]    |           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `prt`
[INFO] [stdout]   --> src/basic/enums.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 47 |     fn prt(&self) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_fun`
[INFO] [stdout]   --> src/basic/enums.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn demo_fun() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Person`
[INFO] [stdout]   --> src/basic/enums.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 61 | struct Person {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_option`
[INFO] [stdout]   --> src/basic/enums.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn demo_option() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Coin`
[INFO] [stdout]   --> src/basic/enums.rs:87:6
[INFO] [stdout]    |
[INFO] [stdout] 87 | enum Coin {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `value_in_cents`
[INFO] [stdout]   --> src/basic/enums.rs:94:4
[INFO] [stdout]    |
[INFO] [stdout] 94 | fn value_in_cents(coin: Coin) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_match`
[INFO] [stdout]    --> src/basic/enums.rs:103:4
[INFO] [stdout]     |
[INFO] [stdout] 103 | fn demo_match() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_if_let`
[INFO] [stdout]    --> src/basic/enums.rs:110:4
[INFO] [stdout]     |
[INFO] [stdout] 110 | fn demo_if_let(num:Option<u8>) {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]   --> src/basic/functions.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub fn demo () {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_closure`
[INFO] [stdout]   --> src/basic/functions.rs:40:4
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn demo_closure() {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Cacher`
[INFO] [stdout]   --> src/basic/functions.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 52 | struct Cacher<T>
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `value`
[INFO] [stdout]   --> src/basic/functions.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 62 |     fn value(&mut self, arg: u32) -> u32 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_closure_as_param`
[INFO] [stdout]   --> src/basic/functions.rs:74:4
[INFO] [stdout]    |
[INFO] [stdout] 74 | fn demo_closure_as_param() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_capture_env`
[INFO] [stdout]   --> src/basic/functions.rs:84:4
[INFO] [stdout]    |
[INFO] [stdout] 84 | fn demo_capture_env() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]   --> src/basic/traits.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub fn demo() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `create_art`
[INFO] [stdout]   --> src/basic/traits.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn create_art() -> NewsArticle {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `create_tw`
[INFO] [stdout]   --> src/basic/traits.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn create_tw() -> Tweet {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_create`
[INFO] [stdout]   --> src/basic/traits.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn demo_create() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `content`
[INFO] [stdout]   --> src/basic/traits.rs:62:5
[INFO] [stdout]    |
[INFO] [stdout] 62 |     pub content: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `notify`
[INFO] [stdout]   --> src/basic/traits.rs:87:4
[INFO] [stdout]    |
[INFO] [stdout] 87 | fn notify(item: impl Summary) {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_argument`
[INFO] [stdout]   --> src/basic/traits.rs:91:4
[INFO] [stdout]    |
[INFO] [stdout] 91 | fn demo_argument() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `show_summary_and_location`
[INFO] [stdout]    --> src/basic/traits.rs:111:4
[INFO] [stdout]     |
[INFO] [stdout] 111 | fn show_summary_and_location(item: impl Summary + Location) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_multiple_traits`
[INFO] [stdout]    --> src/basic/traits.rs:115:4
[INFO] [stdout]     |
[INFO] [stdout] 115 | fn demo_multiple_traits() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Screen`
[INFO] [stdout]    --> src/basic/traits.rs:125:12
[INFO] [stdout]     |
[INFO] [stdout] 125 | pub struct Screen {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `run`
[INFO] [stdout]    --> src/basic/traits.rs:130:12
[INFO] [stdout]     |
[INFO] [stdout] 130 |     pub fn run(&self) {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_trait_object`
[INFO] [stdout]    --> src/basic/traits.rs:152:4
[INFO] [stdout]     |
[INFO] [stdout] 152 | fn demo_trait_object() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]   --> src/basic/pointers.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub fn demo() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_life_time`
[INFO] [stdout]   --> src/basic/pointers.rs:50:4
[INFO] [stdout]    |
[INFO] [stdout] 50 | fn demo_life_time() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `longest`
[INFO] [stdout]   --> src/basic/pointers.rs:60:4
[INFO] [stdout]    |
[INFO] [stdout] 60 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_box_base`
[INFO] [stdout]   --> src/basic/pointers.rs:69:4
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn demo_box_base() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/basic/pointers.rs:87:8
[INFO] [stdout]    |
[INFO] [stdout] 87 |     fn new(x:T) -> MyBox<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_deref`
[INFO] [stdout]    --> src/basic/pointers.rs:102:4
[INFO] [stdout]     |
[INFO] [stdout] 102 | fn demo_deref() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `hello`
[INFO] [stdout]    --> src/basic/pointers.rs:109:4
[INFO] [stdout]     |
[INFO] [stdout] 109 | fn hello(word: &str) {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_deref_coercion`
[INFO] [stdout]    --> src/basic/pointers.rs:113:4
[INFO] [stdout]     |
[INFO] [stdout] 113 | fn demo_deref_coercion() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_drop`
[INFO] [stdout]    --> src/basic/pointers.rs:127:4
[INFO] [stdout]     |
[INFO] [stdout] 127 | fn demo_drop() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `List`
[INFO] [stdout]    --> src/basic/pointers.rs:138:6
[INFO] [stdout]     |
[INFO] [stdout] 138 | enum List {
[INFO] [stdout]     |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_rc`
[INFO] [stdout]    --> src/basic/pointers.rs:143:4
[INFO] [stdout]     |
[INFO] [stdout] 143 | fn demo_rc() {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]  --> src/basic/generics.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn demo() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `A`
[INFO] [stdout]   --> src/basic/generics.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct A<T> {
[INFO] [stdout]    |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `item`
[INFO] [stdout]   --> src/basic/generics.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn item(&self) -> &SomeTypeName {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_create`
[INFO] [stdout]   --> src/basic/threads.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn demo_create() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_join`
[INFO] [stdout]   --> src/basic/threads.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn demo_join() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_move_keyword`
[INFO] [stdout]   --> src/basic/threads.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn demo_move_keyword() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_channel`
[INFO] [stdout]   --> src/basic/threads.rs:71:4
[INFO] [stdout]    |
[INFO] [stdout] 71 | fn demo_channel() {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_channel_multi_producer`
[INFO] [stdout]   --> src/basic/threads.rs:85:4
[INFO] [stdout]    |
[INFO] [stdout] 85 | fn demo_channel_multi_producer() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]   --> src/collectors/vectors.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub fn demo() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_create`
[INFO] [stdout]   --> src/collectors/vectors.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn demo_create() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_loop`
[INFO] [stdout]   --> src/collectors/vectors.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn demo_loop() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Int`
[INFO] [stdout]   --> src/collectors/vectors.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 53 |     Int(i32),
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Text`
[INFO] [stdout]   --> src/collectors/vectors.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 54 |     Text(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_mul_types`
[INFO] [stdout]   --> src/collectors/vectors.rs:57:4
[INFO] [stdout]    |
[INFO] [stdout] 57 | fn demo_mul_types() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]  --> src/collectors/strings.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn demo() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_create`
[INFO] [stdout]   --> src/collectors/strings.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn demo_create() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_plus`
[INFO] [stdout]   --> src/collectors/strings.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn demo_plus() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_char`
[INFO] [stdout]   --> src/collectors/strings.rs:36:4
[INFO] [stdout]    |
[INFO] [stdout] 36 | fn demo_char() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]   --> src/collectors/maps.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn demo() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_create`
[INFO] [stdout]   --> src/collectors/maps.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn demo_create() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo_loop`
[INFO] [stdout]   --> src/collectors/maps.rs:31:4
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn demo_loop() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]  --> src/collectors/linked_list.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn demo() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `List`
[INFO] [stdout]  --> src/feature/cons_list.rs:4:6
[INFO] [stdout]   |
[INFO] [stdout] 4 | enum List {
[INFO] [stdout]   |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/feature/cons_list.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn new() -> List {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `prepend`
[INFO] [stdout]   --> src/feature/cons_list.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn prepend(self, n:i32) -> List {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `stringify`
[INFO] [stdout]   --> src/feature/cons_list.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn stringify(&self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]   --> src/feature/cons_list.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub fn demo() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `demo`
[INFO] [stdout]  --> src/module_example.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn demo () {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/basic/threads.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 49 |         j.join();  // join up thread to main thread, so make main thread to wait for the current thread resolve
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/basic/threads.rs:67:5
[INFO] [stdout]    |
[INFO] [stdout] 67 |     handler.join();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.96s
[INFO] [stdout] warning: 103 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "5cd5b92c8b6125201c056f04ded4dd6779257431127122ba4f95cf9f2570754b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5cd5b92c8b6125201c056f04ded4dd6779257431127122ba4f95cf9f2570754b", kill_on_drop: false }`
[INFO] [stdout] 5cd5b92c8b6125201c056f04ded4dd6779257431127122ba4f95cf9f2570754b