[INFO] updating cached repository https://github.com/Delorus/rust_learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 85e9ac89dac5dca12156acf98619a6a7add91951
[INFO] testing Delorus/rust_learning against master#8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e for pr-74409
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDelorus%2Frust_learning" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Delorus/rust_learning on toolchain 8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Delorus/rust_learning
[INFO] finished tweaking git repo https://github.com/Delorus/rust_learning
[INFO] tweaked toml for git repo https://github.com/Delorus/rust_learning written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/Delorus/rust_learning already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ed3853dc874444719e6996817807cd8f6d6dffdf89d71130159e04067a5f8400
[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" "ed3853dc874444719e6996817807cd8f6d6dffdf89d71130159e04067a5f8400", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ed3853dc874444719e6996817807cd8f6d6dffdf89d71130159e04067a5f8400", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed3853dc874444719e6996817807cd8f6d6dffdf89d71130159e04067a5f8400", kill_on_drop: false }`
[INFO] [stdout] ed3853dc874444719e6996817807cd8f6d6dffdf89d71130159e04067a5f8400
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 70f63932bce55b9503c4088e1cbc1156fac3a02aa3d4c59a4a91c16fd83b8693
[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" "70f63932bce55b9503c4088e1cbc1156fac3a02aa3d4c59a4a91c16fd83b8693", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/bin/borrow_checker_ref_and_copy.rs:76:9
[INFO] [stdout]    |
[INFO] [stdout] 76 |     let y = &x;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/borrow_checker_ref_and_copy.rs:77:9
[INFO] [stdout]    |
[INFO] [stdout] 77 |     let mut z = &mut x;
[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: function is never used: `change_string`
[INFO] [stdout]  --> src/bin/borrow_checker_ref_and_copy.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn change_string() {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `move_string_borrowed`
[INFO] [stdout]   --> src/bin/borrow_checker_ref_and_copy.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn move_string_borrowed() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `move_ownership`
[INFO] [stdout]   --> src/bin/borrow_checker_ref_and_copy.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn move_ownership() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `takes_ownership`
[INFO] [stdout]   --> src/bin/borrow_checker_ref_and_copy.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn takes_ownership(s: String) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `return_ownership`
[INFO] [stdout]   --> src/bin/borrow_checker_ref_and_copy.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn return_ownership() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `return_ownership_via_ref`
[INFO] [stdout]   --> src/bin/borrow_checker_ref_and_copy.rs:51:4
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn return_ownership_via_ref() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ref_and_ownership`
[INFO] [stdout]   --> src/bin/borrow_checker_ref_and_copy.rs:62:4
[INFO] [stdout]    |
[INFO] [stdout] 62 | fn ref_and_ownership() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `return_closures`
[INFO] [stdout]  --> src/bin/adv_functions.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn return_closures() -> Box<dyn Fn(i32) -> i32> {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `connect`
[INFO] [stdout]  --> src/bin/modules/network/mod.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn connect() {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `use_module`
[INFO] [stdout]  --> src/bin/modules/network/mod.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn use_module() {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `connect`
[INFO] [stdout]   --> src/bin/modules/network/mod.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn connect() {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `use_pub_modules`
[INFO] [stdout]   --> src/bin/modules_main.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn use_pub_modules() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/bin/multithreads.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `return_value`
[INFO] [stdout]  --> src/bin/functions.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn return_value() -> i32 {
[INFO] [stdout]   |    ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `not_return_value`
[INFO] [stdout]   --> src/bin/functions.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn not_return_value() -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Debug`
[INFO] [stdout]  --> src/bin/traits.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::{Debug, Display};
[INFO] [stdout]   |                ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ip4`
[INFO] [stdout]   --> src/bin/enums.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let ip4 = IpAddrKind::IPv4;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_ip4`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ip6`
[INFO] [stdout]   --> src/bin/enums.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let ip6 = IpAddrKind::IPv6;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_ip6`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `loopback`
[INFO] [stdout]   --> src/bin/enums.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let loopback = IpAddr {
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_loopback`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `T` in this scope
[INFO] [stdout]   --> src/bin/adv_types.rs:18:30
[INFO] [stdout]    |
[INFO] [stdout] 18 | type Result = result::Result<T, io::Error>;
[INFO] [stdout]    |                              ^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/bin/state_pattern.rs:47:41
[INFO] [stdout]    |
[INFO] [stdout] 47 |         pub fn request_preview(self) -> PendingReviewPost {
[INFO] [stdout]    |                ---------------          ^^^^^^^^^^^^^^^^^ expected struct `blog::PendingReviewPost`, found `()`
[INFO] [stdout]    |                |
[INFO] [stdout]    |                implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `IpAddrKind`
[INFO] [stdout]  --> src/bin/enums.rs:6:6
[INFO] [stdout]   |
[INFO] [stdout] 6 | enum IpAddrKind {
[INFO] [stdout]   |      ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `create_enum`
[INFO] [stdout]   --> src/bin/enums.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn create_enum() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `IpAddr`
[INFO] [stdout]   --> src/bin/enums.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct IpAddr {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `create_struct_with_enum`
[INFO] [stdout]   --> src/bin/enums.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn create_struct_with_enum() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Quit`
[INFO] [stdout]   --> src/bin/enums.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     Quit,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Move`
[INFO] [stdout]   --> src/bin/enums.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     Move { x: i32, y: i32 },
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Write`
[INFO] [stdout]   --> src/bin/enums.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     Write(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ChangeColor`
[INFO] [stdout]   --> src/bin/enums.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     ChangeColor(i32, i32, i32),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `call`
[INFO] [stdout]   --> src/bin/enums.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn call(&self) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `call_message`
[INFO] [stdout]   --> src/bin/enums.rs:44:4
[INFO] [stdout]    |
[INFO] [stdout] 44 | fn call_message() {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Alabama`
[INFO] [stdout]   --> src/bin/enums.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     Alabama,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Alaska`
[INFO] [stdout]   --> src/bin/enums.rs:52:5
[INFO] [stdout]    |
[INFO] [stdout] 52 |     Alaska
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Coin`
[INFO] [stdout]   --> src/bin/enums.rs:55:6
[INFO] [stdout]    |
[INFO] [stdout] 55 | enum Coin {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `mutable_var`
[INFO] [stdout]  --> src/bin/variables.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn mutable_var() {
[INFO] [stdout]   |    ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `constant`
[INFO] [stdout]   --> src/bin/variables.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn constant() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `const_in_func`
[INFO] [stdout]   --> src/bin/variables.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn const_in_func() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `MAX_POINTS`
[INFO] [stdout]   --> src/bin/variables.rs:24:1
[INFO] [stdout]    |
[INFO] [stdout] 24 | const MAX_POINTS: u32 = 200_000;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `multiple_vars`
[INFO] [stdout]   --> src/bin/variables.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn multiple_vars() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `value_in_cents`
[INFO] [stdout]   --> src/bin/enums.rs:62:4
[INFO] [stdout]    |
[INFO] [stdout] 62 | fn value_in_cents(coin: Coin) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_plus_one`
[INFO] [stdout]   --> src/bin/enums.rs:74:4
[INFO] [stdout]    |
[INFO] [stdout] 74 | fn get_plus_one() {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `learning`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: struct is never constructed: `Guess`
[INFO] [stdout]   --> src/bin/tests.rs:60:8
[INFO] [stdout]    |
[INFO] [stdout] 60 | struct Guess {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]   --> src/bin/data_types.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let z = x as u32 + y;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/bin/tests.rs:65:12
[INFO] [stdout]    |
[INFO] [stdout] 65 |     pub fn new(value: u32) -> Guess {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/bin/adv_types.rs:20:22
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn never_return() -> ! {
[INFO] [stdout]    |    ------------      ^ expected `!`, found `()`
[INFO] [stdout]    |    |
[INFO] [stdout]    |    implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout]    |
[INFO] [stdout]    = note:   expected type `!`
[INFO] [stdout]            found unit type `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `reply`
[INFO] [stdout]  --> src/bin/traits.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     reply: bool,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `retweet`
[INFO] [stdout]  --> src/bin/traits.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     retweet: bool,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `content`
[INFO] [stdout]   --> src/bin/traits.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     content: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `tweet_summ`
[INFO] [stdout]   --> src/bin/traits.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn tweet_summ() {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Pair`
[INFO] [stdout]   --> src/bin/traits.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 | struct Pair<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/bin/traits.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fn new(x: T, y: T) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `cmp_display`
[INFO] [stdout]   --> src/bin/traits.rs:65:8
[INFO] [stdout]    |
[INFO] [stdout] 65 |     fn cmp_display(&self) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Screen`
[INFO] [stdout]   --> src/bin/traits.rs:78:8
[INFO] [stdout]    |
[INFO] [stdout] 78 | struct Screen {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `run`
[INFO] [stdout]   --> src/bin/traits.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 |     fn run(&self) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `width`
[INFO] [stdout]   --> src/bin/traits.rs:91:5
[INFO] [stdout]    |
[INFO] [stdout] 91 |     width: u32,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `height`
[INFO] [stdout]   --> src/bin/traits.rs:92:5
[INFO] [stdout]    |
[INFO] [stdout] 92 |     height: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `label`
[INFO] [stdout]   --> src/bin/traits.rs:93:5
[INFO] [stdout]    |
[INFO] [stdout] 93 |     label: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `use_trait_object`
[INFO] [stdout]    --> src/bin/traits.rs:102:4
[INFO] [stdout]     |
[INFO] [stdout] 102 | fn use_trait_object() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0308, E0412.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `cast_to_unsigned`
[INFO] [stdout]  --> src/bin/data_types.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn cast_to_unsigned() {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `representation_of_number`
[INFO] [stdout]   --> src/bin/data_types.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn representation_of_number() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `implicit_cast`
[INFO] [stdout]   --> src/bin/data_types.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn implicit_cast() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `std_f32`
[INFO] [stdout]   --> src/bin/data_types.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn std_f32() {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `logic_op`
[INFO] [stdout]   --> src/bin/data_types.rs:71:4
[INFO] [stdout]    |
[INFO] [stdout] 71 | fn logic_op() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `chars`
[INFO] [stdout]   --> src/bin/data_types.rs:87:4
[INFO] [stdout]    |
[INFO] [stdout] 87 | fn chars() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `tuples`
[INFO] [stdout]   --> src/bin/data_types.rs:97:4
[INFO] [stdout]    |
[INFO] [stdout] 97 | fn tuples() {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `square`
[INFO] [stdout]   --> src/bin/methods.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn square(size: u32) -> Rectangle {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `can_hold`
[INFO] [stdout]   --> src/bin/methods.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `create_new_thread`
[INFO] [stdout]   --> src/bin/multithreads.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn create_new_thread() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `wait_new_thread`
[INFO] [stdout]   --> src/bin/multithreads.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn wait_new_thread() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `move_closure_with_new_thread`
[INFO] [stdout]   --> src/bin/multithreads.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn move_closure_with_new_thread() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `create_channel`
[INFO] [stdout]   --> src/bin/multithreads.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn create_channel() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `sending_multiple_values_in_channels`
[INFO] [stdout]   --> src/bin/multithreads.rs:50:4
[INFO] [stdout]    |
[INFO] [stdout] 50 | fn sending_multiple_values_in_channels() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `mutex`
[INFO] [stdout]   --> src/bin/multithreads.rs:87:4
[INFO] [stdout]    |
[INFO] [stdout] 87 | fn mutex() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/bin/multithreads.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     handle.join();
[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 `std::result::Result` that must be used
[INFO] [stdout]   --> src/bin/multithreads.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     handle.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: function is never used: `override_plus`
[INFO] [stdout]   --> src/bin/adv_traits.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn override_plus() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `fly`
[INFO] [stdout]   --> src/bin/adv_traits.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 67 |     fn fly(&self) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `several_realisation`
[INFO] [stdout]   --> src/bin/adv_traits.rs:72:4
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn several_realisation() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Dog`
[INFO] [stdout]   --> src/bin/adv_traits.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 | struct Dog;
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `baby_name`
[INFO] [stdout]   --> src/bin/adv_traits.rs:86:8
[INFO] [stdout]    |
[INFO] [stdout] 86 |     fn baby_name() -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `several_static_realisation`
[INFO] [stdout]   --> src/bin/adv_traits.rs:97:4
[INFO] [stdout]    |
[INFO] [stdout] 97 | fn several_static_realisation() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `newtype`
[INFO] [stdout]    --> src/bin/adv_traits.rs:142:4
[INFO] [stdout]     |
[INFO] [stdout] 142 | fn newtype() {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "70f63932bce55b9503c4088e1cbc1156fac3a02aa3d4c59a4a91c16fd83b8693", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70f63932bce55b9503c4088e1cbc1156fac3a02aa3d4c59a4a91c16fd83b8693", kill_on_drop: false }`
[INFO] [stdout] 70f63932bce55b9503c4088e1cbc1156fac3a02aa3d4c59a4a91c16fd83b8693