[INFO] cloning repository https://github.com/ds1231h/RustSimpleCode
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ds1231h/RustSimpleCode" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fds1231h%2FRustSimpleCode", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fds1231h%2FRustSimpleCode'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 10c8e8b8d85f161504966b6dd1523ab16c8c3141
[INFO] testing ds1231h/RustSimpleCode against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fds1231h%2FRustSimpleCode" "/workspace/builds/worker-60/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-60/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ds1231h/RustSimpleCode on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ds1231h/RustSimpleCode
[INFO] finished tweaking git repo https://github.com/ds1231h/RustSimpleCode
[INFO] tweaked toml for git repo https://github.com/ds1231h/RustSimpleCode written to /workspace/builds/worker-60/source/Cargo.toml
[INFO] crate git repo https://github.com/ds1231h/RustSimpleCode already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-60/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-60/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] db118ddedde2927d1d9098f1b63c6ff9cf8fea01a49e7b60dbc26ab8e2d1725d
[INFO] running `Command { std: "docker" "start" "-a" "db118ddedde2927d1d9098f1b63c6ff9cf8fea01a49e7b60dbc26ab8e2d1725d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "db118ddedde2927d1d9098f1b63c6ff9cf8fea01a49e7b60dbc26ab8e2d1725d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db118ddedde2927d1d9098f1b63c6ff9cf8fea01a49e7b60dbc26ab8e2d1725d", kill_on_drop: false }`
[INFO] [stdout] db118ddedde2927d1d9098f1b63c6ff9cf8fea01a49e7b60dbc26ab8e2d1725d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-60/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-60/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7064d55df1637aedfbe2d3c0bcbc46378e002d8a58136408a38f54aeeecebf41
[INFO] running `Command { std: "docker" "start" "-a" "7064d55df1637aedfbe2d3c0bcbc46378e002d8a58136408a38f54aeeecebf41", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling rand_core v0.6.2
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling rand v0.8.3
[INFO] [stderr]    Compiling Rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `duplicate`
[INFO] [stdout]   --> src/common_concept.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let duplicate = [3; 5];
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_duplicate`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/common_concept.rs:44:10
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let (x, y, z) = tup;
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]   --> src/common_concept.rs:44:16
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let (x, y, z) = tup;
[INFO] [stdout]    |                ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s2`
[INFO] [stdout]   --> src/ownership.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let s2 = s1;
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s2`
[INFO] [stdout]   --> src/ownership.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let s2 = s1.clone();
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i2`
[INFO] [stdout]   --> src/ownership.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let i2 = &mut i;
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_i2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `unit_struct`
[INFO] [stdout]   --> src/structs.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let unit_struct = UnitStruct {};
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unit_struct`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `origin`
[INFO] [stdout]    --> src/structs.rs:105:9
[INFO] [stdout]     |
[INFO] [stdout] 105 |     let origin = Point(1, 2, 3);
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_origin`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `y` is never read
[INFO] [stdout]   --> src/enums.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let mut y: Option<i8> = None;
[INFO] [stdout]    |             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `XX`
[INFO] [stdout]  --> src/common_concept.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | const XX: u8 = 10;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `basic_syntax`
[INFO] [stdout]  --> src/common_concept.rs:7:15
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub(crate) fn basic_syntax() {
[INFO] [stdout]   |               ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `guess_game`
[INFO] [stdout]   --> src/common_concept.rs:54:15
[INFO] [stdout]    |
[INFO] [stdout] 54 | pub(crate) fn guess_game() {
[INFO] [stdout]    |               ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `function_test`
[INFO] [stdout]  --> src/functions.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub(crate) fn function_test() {
[INFO] [stdout]   |               ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_1`
[INFO] [stdout]  --> src/functions.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn test_1() {
[INFO] [stdout]   |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_func`
[INFO] [stdout]   --> src/functions.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn test_func(x: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_2`
[INFO] [stdout]   --> src/functions.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn test_2() {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `temperature_converter`
[INFO] [stdout]   --> src/functions.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn temperature_converter(fahrenheit: f64) -> f64 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_3`
[INFO] [stdout]   --> src/functions.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn test_3() {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fibonacci`
[INFO] [stdout]   --> src/functions.rs:45:4
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn fibonacci(num: i8) -> i8 {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ownership_test`
[INFO] [stdout]  --> src/ownership.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub(crate) fn ownership_test() {
[INFO] [stdout]   |               ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `takes_ownership`
[INFO] [stdout]   --> src/ownership.rs:70:4
[INFO] [stdout]    |
[INFO] [stdout] 70 | fn takes_ownership(some_string: String) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `make_copy`
[INFO] [stdout]   --> src/ownership.rs:74:4
[INFO] [stdout]    |
[INFO] [stdout] 74 | fn make_copy(some_integer: i32) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `change`
[INFO] [stdout]   --> src/ownership.rs:78:4
[INFO] [stdout]    |
[INFO] [stdout] 78 | fn change(some_string: &mut String) {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `first_word`
[INFO] [stdout]   --> src/ownership.rs:93:4
[INFO] [stdout]    |
[INFO] [stdout] 93 | fn first_word(s:& String) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `slice_first_word`
[INFO] [stdout]    --> src/ownership.rs:104:4
[INFO] [stdout]     |
[INFO] [stdout] 104 | fn slice_first_word(s: &mut String) -> &str {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `slice_second_word`
[INFO] [stdout]    --> src/ownership.rs:115:4
[INFO] [stdout]     |
[INFO] [stdout] 115 | fn slice_second_word(s: &mut String) -> &str {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `User`
[INFO] [stdout]  --> src/structs.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct User {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `structs_test`
[INFO] [stdout]  --> src/structs.rs:8:15
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub(crate) fn structs_test() {
[INFO] [stdout]   |               ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `area`
[INFO] [stdout]   --> src/structs.rs:65:8
[INFO] [stdout]    |
[INFO] [stdout] 65 |     fn area(&self) -> u32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `can_hold`
[INFO] [stdout]   --> src/structs.rs:70:8
[INFO] [stdout]    |
[INFO] [stdout] 70 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `square`
[INFO] [stdout]   --> src/structs.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 75 |     fn square(size: u32) -> Rectangle {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `build_user`
[INFO] [stdout]   --> src/structs.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn build_user(email: String, username: String) -> User {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `update_struct`
[INFO] [stdout]   --> src/structs.rs:92:4
[INFO] [stdout]    |
[INFO] [stdout] 92 | fn update_struct(user1: User, email: String, username: String) -> User {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `tuple_structs`
[INFO] [stdout]    --> src/structs.rs:100:4
[INFO] [stdout]     |
[INFO] [stdout] 100 | fn tuple_structs() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `StrV4`
[INFO] [stdout]   --> src/enums.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     StrV4(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `StrV6`
[INFO] [stdout]   --> src/enums.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     StrV6(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `VarV4`
[INFO] [stdout]   --> src/enums.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     VarV4(u8, u8, u8, u8),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `basic_test`
[INFO] [stdout]   --> src/enums.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn basic_test() {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `route`
[INFO] [stdout]   --> src/enums.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn route(ip_kind: IpAddrKind) {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Quit`
[INFO] [stdout]   --> src/enums.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     Quit, // has no data associated with it at all.
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Move`
[INFO] [stdout]   --> src/enums.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     Move { x: i32, y: i32}, // includes an anonymous struct inside it.
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Write`
[INFO] [stdout]   --> src/enums.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 36 |     Write(String),// includes a single String.
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ChangeColor`
[INFO] [stdout]   --> src/enums.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 37 |     ChangeColor(i32, i32, i32), // includes three i32 values.
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Nested`
[INFO] [stdout]   --> src/enums.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 |     Nested(Box<Message>), // insert some indirection (e.g., a `Box`, `Rc`, or `&`) to make `Message` representable
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `previous_message`
[INFO] [stdout]   --> src/enums.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 |     fn previous_message(&self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `message_test`
[INFO] [stdout]   --> src/enums.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn message_test() {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `Rust` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `rust`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 47 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.37s
[INFO] running `Command { std: "docker" "inspect" "7064d55df1637aedfbe2d3c0bcbc46378e002d8a58136408a38f54aeeecebf41", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7064d55df1637aedfbe2d3c0bcbc46378e002d8a58136408a38f54aeeecebf41", kill_on_drop: false }`
[INFO] [stdout] 7064d55df1637aedfbe2d3c0bcbc46378e002d8a58136408a38f54aeeecebf41
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-60/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-60/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 67d8f1dfdda279357f569b9203786fdc16891e96557af211631cdfb5ab0559be
[INFO] running `Command { std: "docker" "start" "-a" "67d8f1dfdda279357f569b9203786fdc16891e96557af211631cdfb5ab0559be", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling Rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `duplicate`
[INFO] [stdout]   --> src/common_concept.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let duplicate = [3; 5];
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_duplicate`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/common_concept.rs:44:10
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let (x, y, z) = tup;
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]   --> src/common_concept.rs:44:16
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let (x, y, z) = tup;
[INFO] [stdout]    |                ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s2`
[INFO] [stdout]   --> src/ownership.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let s2 = s1;
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s2`
[INFO] [stdout]   --> src/ownership.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let s2 = s1.clone();
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i2`
[INFO] [stdout]   --> src/ownership.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let i2 = &mut i;
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_i2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `unit_struct`
[INFO] [stdout]   --> src/structs.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let unit_struct = UnitStruct {};
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unit_struct`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `origin`
[INFO] [stdout]    --> src/structs.rs:105:9
[INFO] [stdout]     |
[INFO] [stdout] 105 |     let origin = Point(1, 2, 3);
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_origin`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `y` is never read
[INFO] [stdout]   --> src/enums.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let mut y: Option<i8> = None;
[INFO] [stdout]    |             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `XX`
[INFO] [stdout]  --> src/common_concept.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | const XX: u8 = 10;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `basic_syntax`
[INFO] [stdout]  --> src/common_concept.rs:7:15
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub(crate) fn basic_syntax() {
[INFO] [stdout]   |               ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `guess_game`
[INFO] [stdout]   --> src/common_concept.rs:54:15
[INFO] [stdout]    |
[INFO] [stdout] 54 | pub(crate) fn guess_game() {
[INFO] [stdout]    |               ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `function_test`
[INFO] [stdout]  --> src/functions.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub(crate) fn function_test() {
[INFO] [stdout]   |               ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_1`
[INFO] [stdout]  --> src/functions.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn test_1() {
[INFO] [stdout]   |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_func`
[INFO] [stdout]   --> src/functions.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn test_func(x: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_2`
[INFO] [stdout]   --> src/functions.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn test_2() {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `temperature_converter`
[INFO] [stdout]   --> src/functions.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn temperature_converter(fahrenheit: f64) -> f64 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_3`
[INFO] [stdout]   --> src/functions.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn test_3() {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fibonacci`
[INFO] [stdout]   --> src/functions.rs:45:4
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn fibonacci(num: i8) -> i8 {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ownership_test`
[INFO] [stdout]  --> src/ownership.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub(crate) fn ownership_test() {
[INFO] [stdout]   |               ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `takes_ownership`
[INFO] [stdout]   --> src/ownership.rs:70:4
[INFO] [stdout]    |
[INFO] [stdout] 70 | fn takes_ownership(some_string: String) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `make_copy`
[INFO] [stdout]   --> src/ownership.rs:74:4
[INFO] [stdout]    |
[INFO] [stdout] 74 | fn make_copy(some_integer: i32) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `change`
[INFO] [stdout]   --> src/ownership.rs:78:4
[INFO] [stdout]    |
[INFO] [stdout] 78 | fn change(some_string: &mut String) {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `first_word`
[INFO] [stdout]   --> src/ownership.rs:93:4
[INFO] [stdout]    |
[INFO] [stdout] 93 | fn first_word(s:& String) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `slice_first_word`
[INFO] [stdout]    --> src/ownership.rs:104:4
[INFO] [stdout]     |
[INFO] [stdout] 104 | fn slice_first_word(s: &mut String) -> &str {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `slice_second_word`
[INFO] [stdout]    --> src/ownership.rs:115:4
[INFO] [stdout]     |
[INFO] [stdout] 115 | fn slice_second_word(s: &mut String) -> &str {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `User`
[INFO] [stdout]  --> src/structs.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct User {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `structs_test`
[INFO] [stdout]  --> src/structs.rs:8:15
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub(crate) fn structs_test() {
[INFO] [stdout]   |               ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `area`
[INFO] [stdout]   --> src/structs.rs:65:8
[INFO] [stdout]    |
[INFO] [stdout] 65 |     fn area(&self) -> u32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `can_hold`
[INFO] [stdout]   --> src/structs.rs:70:8
[INFO] [stdout]    |
[INFO] [stdout] 70 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `square`
[INFO] [stdout]   --> src/structs.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 75 |     fn square(size: u32) -> Rectangle {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `build_user`
[INFO] [stdout]   --> src/structs.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn build_user(email: String, username: String) -> User {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `update_struct`
[INFO] [stdout]   --> src/structs.rs:92:4
[INFO] [stdout]    |
[INFO] [stdout] 92 | fn update_struct(user1: User, email: String, username: String) -> User {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `tuple_structs`
[INFO] [stdout]    --> src/structs.rs:100:4
[INFO] [stdout]     |
[INFO] [stdout] 100 | fn tuple_structs() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `StrV4`
[INFO] [stdout]   --> src/enums.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     StrV4(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `StrV6`
[INFO] [stdout]   --> src/enums.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     StrV6(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `VarV4`
[INFO] [stdout]   --> src/enums.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     VarV4(u8, u8, u8, u8),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `basic_test`
[INFO] [stdout]   --> src/enums.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn basic_test() {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `route`
[INFO] [stdout]   --> src/enums.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn route(ip_kind: IpAddrKind) {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Quit`
[INFO] [stdout]   --> src/enums.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     Quit, // has no data associated with it at all.
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Move`
[INFO] [stdout]   --> src/enums.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     Move { x: i32, y: i32}, // includes an anonymous struct inside it.
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Write`
[INFO] [stdout]   --> src/enums.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 36 |     Write(String),// includes a single String.
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ChangeColor`
[INFO] [stdout]   --> src/enums.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 37 |     ChangeColor(i32, i32, i32), // includes three i32 values.
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Nested`
[INFO] [stdout]   --> src/enums.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 |     Nested(Box<Message>), // insert some indirection (e.g., a `Box`, `Rc`, or `&`) to make `Message` representable
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `previous_message`
[INFO] [stdout]   --> src/enums.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 |     fn previous_message(&self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `message_test`
[INFO] [stdout]   --> src/enums.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn message_test() {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `Rust` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `rust`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 47 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.39s
[INFO] running `Command { std: "docker" "inspect" "67d8f1dfdda279357f569b9203786fdc16891e96557af211631cdfb5ab0559be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67d8f1dfdda279357f569b9203786fdc16891e96557af211631cdfb5ab0559be", kill_on_drop: false }`
[INFO] [stdout] 67d8f1dfdda279357f569b9203786fdc16891e96557af211631cdfb5ab0559be
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-60/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-60/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 412ab27e014f6ef1280e72142a520cf8c0730907bae301a742487eaf88e9d8ae
[INFO] running `Command { std: "docker" "start" "-a" "412ab27e014f6ef1280e72142a520cf8c0730907bae301a742487eaf88e9d8ae", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `duplicate`
[INFO] [stderr]   --> src/common_concept.rs:43:9
[INFO] [stderr]    |
[INFO] [stderr] 43 |     let duplicate = [3; 5];
[INFO] [stderr]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_duplicate`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/common_concept.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 |     let (x, y, z) = tup;
[INFO] [stderr]    |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `z`
[INFO] [stderr]   --> src/common_concept.rs:44:16
[INFO] [stderr]    |
[INFO] [stderr] 44 |     let (x, y, z) = tup;
[INFO] [stderr]    |                ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s2`
[INFO] [stderr]   --> src/ownership.rs:16:9
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let s2 = s1;
[INFO] [stderr]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s2`
[INFO] [stderr]   --> src/ownership.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let s2 = s1.clone();
[INFO] [stderr]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i2`
[INFO] [stderr]   --> src/ownership.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 46 |     let i2 = &mut i;
[INFO] [stderr]    |         ^^ help: if this is intentional, prefix it with an underscore: `_i2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `unit_struct`
[INFO] [stderr]   --> src/structs.rs:29:9
[INFO] [stderr]    |
[INFO] [stderr] 29 |     let unit_struct = UnitStruct {};
[INFO] [stderr]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unit_struct`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `origin`
[INFO] [stderr]    --> src/structs.rs:105:9
[INFO] [stderr]     |
[INFO] [stderr] 105 |     let origin = Point(1, 2, 3);
[INFO] [stderr]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_origin`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `y` is never read
[INFO] [stderr]   --> src/enums.rs:69:13
[INFO] [stderr]    |
[INFO] [stderr] 69 |     let mut y: Option<i8> = None;
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `XX`
[INFO] [stderr]  --> src/common_concept.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | const XX: u8 = 10;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `basic_syntax`
[INFO] [stderr]  --> src/common_concept.rs:7:15
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub(crate) fn basic_syntax() {
[INFO] [stderr]   |               ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `guess_game`
[INFO] [stderr]   --> src/common_concept.rs:54:15
[INFO] [stderr]    |
[INFO] [stderr] 54 | pub(crate) fn guess_game() {
[INFO] [stderr]    |               ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `function_test`
[INFO] [stderr]  --> src/functions.rs:1:15
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub(crate) fn function_test() {
[INFO] [stderr]   |               ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_1`
[INFO] [stderr]  --> src/functions.rs:7:4
[INFO] [stderr]   |
[INFO] [stderr] 7 | fn test_1() {
[INFO] [stderr]   |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_func`
[INFO] [stderr]   --> src/functions.rs:12:4
[INFO] [stderr]    |
[INFO] [stderr] 12 | fn test_func(x: i32) -> i32 {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_2`
[INFO] [stderr]   --> src/functions.rs:25:4
[INFO] [stderr]    |
[INFO] [stderr] 25 | fn test_2() {
[INFO] [stderr]    |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `temperature_converter`
[INFO] [stderr]   --> src/functions.rs:34:4
[INFO] [stderr]    |
[INFO] [stderr] 34 | fn temperature_converter(fahrenheit: f64) -> f64 {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_3`
[INFO] [stderr]   --> src/functions.rs:39:4
[INFO] [stderr]    |
[INFO] [stderr] 39 | fn test_3() {
[INFO] [stderr]    |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fibonacci`
[INFO] [stderr]   --> src/functions.rs:45:4
[INFO] [stderr]    |
[INFO] [stderr] 45 | fn fibonacci(num: i8) -> i8 {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `ownership_test`
[INFO] [stderr]  --> src/ownership.rs:3:15
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub(crate) fn ownership_test() {
[INFO] [stderr]   |               ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `takes_ownership`
[INFO] [stderr]   --> src/ownership.rs:70:4
[INFO] [stderr]    |
[INFO] [stderr] 70 | fn takes_ownership(some_string: String) {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `make_copy`
[INFO] [stderr]   --> src/ownership.rs:74:4
[INFO] [stderr]    |
[INFO] [stderr] 74 | fn make_copy(some_integer: i32) {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `change`
[INFO] [stderr]   --> src/ownership.rs:78:4
[INFO] [stderr]    |
[INFO] [stderr] 78 | fn change(some_string: &mut String) {
[INFO] [stderr]    |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `first_word`
[INFO] [stderr]   --> src/ownership.rs:93:4
[INFO] [stderr]    |
[INFO] [stderr] 93 | fn first_word(s:& String) -> usize {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `slice_first_word`
[INFO] [stderr]    --> src/ownership.rs:104:4
[INFO] [stderr]     |
[INFO] [stderr] 104 | fn slice_first_word(s: &mut String) -> &str {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `slice_second_word`
[INFO] [stderr]    --> src/ownership.rs:115:4
[INFO] [stderr]     |
[INFO] [stderr] 115 | fn slice_second_word(s: &mut String) -> &str {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `User`
[INFO] [stderr]  --> src/structs.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct User {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `structs_test`
[INFO] [stderr]  --> src/structs.rs:8:15
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub(crate) fn structs_test() {
[INFO] [stderr]   |               ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `area`
[INFO] [stderr]   --> src/structs.rs:65:8
[INFO] [stderr]    |
[INFO] [stderr] 65 |     fn area(&self) -> u32 {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `can_hold`
[INFO] [stderr]   --> src/structs.rs:70:8
[INFO] [stderr]    |
[INFO] [stderr] 70 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `square`
[INFO] [stderr]   --> src/structs.rs:75:8
[INFO] [stderr]    |
[INFO] [stderr] 75 |     fn square(size: u32) -> Rectangle {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `build_user`
[INFO] [stderr]   --> src/structs.rs:83:4
[INFO] [stderr]    |
[INFO] [stderr] 83 | fn build_user(email: String, username: String) -> User {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `update_struct`
[INFO] [stderr]   --> src/structs.rs:92:4
[INFO] [stderr]    |
[INFO] [stderr] 92 | fn update_struct(user1: User, email: String, username: String) -> User {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tuple_structs`
[INFO] [stderr]    --> src/structs.rs:100:4
[INFO] [stderr]     |
[INFO] [stderr] 100 | fn tuple_structs() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `StrV4`
[INFO] [stderr]   --> src/enums.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     StrV4(String),
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `StrV6`
[INFO] [stderr]   --> src/enums.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     StrV6(String),
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `VarV4`
[INFO] [stderr]   --> src/enums.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     VarV4(u8, u8, u8, u8),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `basic_test`
[INFO] [stderr]   --> src/enums.rs:19:4
[INFO] [stderr]    |
[INFO] [stderr] 19 | fn basic_test() {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `route`
[INFO] [stderr]   --> src/enums.rs:28:4
[INFO] [stderr]    |
[INFO] [stderr] 28 | fn route(ip_kind: IpAddrKind) {
[INFO] [stderr]    |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Quit`
[INFO] [stderr]   --> src/enums.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     Quit, // has no data associated with it at all.
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Move`
[INFO] [stderr]   --> src/enums.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     Move { x: i32, y: i32}, // includes an anonymous struct inside it.
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Write`
[INFO] [stderr]   --> src/enums.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     Write(String),// includes a single String.
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ChangeColor`
[INFO] [stderr]   --> src/enums.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     ChangeColor(i32, i32, i32), // includes three i32 values.
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Nested`
[INFO] [stderr]   --> src/enums.rs:38:5
[INFO] [stderr]    |
[INFO] [stderr] 38 |     Nested(Box<Message>), // insert some indirection (e.g., a `Box`, `Rc`, or `&`) to make `Message` representable
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `previous_message`
[INFO] [stderr]   --> src/enums.rs:42:8
[INFO] [stderr]    |
[INFO] [stderr] 42 |     fn previous_message(&self) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `message_test`
[INFO] [stderr]   --> src/enums.rs:47:4
[INFO] [stderr]    |
[INFO] [stderr] 47 | fn message_test() {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: crate `Rust` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `rust`
[INFO] [stderr] 
[INFO] [stderr] warning: `Rust` (bin "Rust" test) generated 47 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/Rust-63606e1c683fcbe3)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "412ab27e014f6ef1280e72142a520cf8c0730907bae301a742487eaf88e9d8ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "412ab27e014f6ef1280e72142a520cf8c0730907bae301a742487eaf88e9d8ae", kill_on_drop: false }`
[INFO] [stdout] 412ab27e014f6ef1280e72142a520cf8c0730907bae301a742487eaf88e9d8ae