[INFO] updating cached repository https://github.com/happychameleon/rust_practice
[INFO] running `"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"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4a9cb7b11618bd3801355e8b7130058f06c5cd6f
[INFO] checking happychameleon/rust_practice against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhappychameleon%2Frust_practice" "/workspace/builds/worker-5/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/happychameleon/rust_practice on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/happychameleon/rust_practice
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[INFO] tweaked toml for git repo https://github.com/happychameleon/rust_practice written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/happychameleon/rust_practice already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "/opt/rustwide/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b47adb2bb7c939bc893c3c98ffa7c082818f3d6ce2b7cedc2279e20a7639183c
[INFO] running `"docker" "start" "-a" "b47adb2bb7c939bc893c3c98ffa7c082818f3d6ce2b7cedc2279e20a7639183c"`
[INFO] [stderr]     Checking rust_by_example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: type `Foo_two` should have an upper camel case name
[INFO] [stderr]     --> src/main.rs:1084:6
[INFO] [stderr]      |
[INFO] [stderr] 1084 | enum Foo_two {
[INFO] [stderr]      |      ^^^^^^^ help: convert the identifier to upper camel case: `FooTwo`
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused label
[INFO] [stderr]     --> src/main.rs:1146:9
[INFO] [stderr]      |
[INFO] [stderr] 1146 |         'inner: loop {
[INFO] [stderr]      |         ^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_labels)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `Foo_two` should have an upper camel case name
[INFO] [stderr]     --> src/main.rs:1084:6
[INFO] [stderr]      |
[INFO] [stderr] 1084 | enum Foo_two {
[INFO] [stderr]      |      ^^^^^^^ help: convert the identifier to upper camel case: `FooTwo`
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused label
[INFO] [stderr]     --> src/main.rs:1146:9
[INFO] [stderr]      |
[INFO] [stderr] 1146 |         'inner: loop {
[INFO] [stderr]      |         ^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_labels)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `logical`
[INFO] [stderr]    --> src/main.rs:283:9
[INFO] [stderr]     |
[INFO] [stderr] 283 |     let logical: bool = true;
[INFO] [stderr]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_logical`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a_float`
[INFO] [stderr]    --> src/main.rs:285:9
[INFO] [stderr]     |
[INFO] [stderr] 285 |     let a_float: f64 = 1.0; // Regualr annotation
[INFO] [stderr]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_a_float`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `an_integer`
[INFO] [stderr]    --> src/main.rs:286:9
[INFO] [stderr]     |
[INFO] [stderr] 286 |     let an_integer = 5i32; // Suffix annotation
[INFO] [stderr]     |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_an_integer`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `default_float`
[INFO] [stderr]    --> src/main.rs:289:9
[INFO] [stderr]     |
[INFO] [stderr] 289 |     let default_float = 3.0; // `f64`
[INFO] [stderr]     |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_default_float`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `default_intager`
[INFO] [stderr]    --> src/main.rs:290:9
[INFO] [stderr]     |
[INFO] [stderr] 290 |     let default_intager = 7; // `i32`
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_default_intager`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `inferred_type` is assigned to, but never used
[INFO] [stderr]    --> src/main.rs:293:9
[INFO] [stderr]     |
[INFO] [stderr] 293 |     let mut inferred_type =  12; // Type i64 is inferred from another line
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: consider using `_inferred_type` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `inferred_type` is never read
[INFO] [stderr]    --> src/main.rs:294:5
[INFO] [stderr]     |
[INFO] [stderr] 294 |     inferred_type = 4294967296i64;
[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: variable `mutable` is assigned to, but never used
[INFO] [stderr]    --> src/main.rs:297:9
[INFO] [stderr]     |
[INFO] [stderr] 297 |     let mut mutable = 12; // Mutable `i32`
[INFO] [stderr]     |         ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: consider using `_mutable` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `mutable` is never read
[INFO] [stderr]    --> src/main.rs:298:5
[INFO] [stderr]     |
[INFO] [stderr] 298 |     mutable = 21;
[INFO] [stderr]     |     ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `mutable`
[INFO] [stderr]    --> src/main.rs:304:9
[INFO] [stderr]     |
[INFO] [stderr] 304 |     let mutable = true;
[INFO] [stderr]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mutable`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]    --> src/main.rs:613:9
[INFO] [stderr]     |
[INFO] [stderr] 613 |     let x = Operations::Add;
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]     --> src/main.rs:1471:25
[INFO] [stderr]      |
[INFO] [stderr] 1471 |     if let Foo_two::Qux(value @ 100) = c {
[INFO] [stderr]      |                         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `logical`
[INFO] [stderr]    --> src/main.rs:283:9
[INFO] [stderr]     |
[INFO] [stderr] 283 |     let logical: bool = true;
[INFO] [stderr]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_logical`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a_float`
[INFO] [stderr]    --> src/main.rs:285:9
[INFO] [stderr]     |
[INFO] [stderr] 285 |     let a_float: f64 = 1.0; // Regualr annotation
[INFO] [stderr]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_a_float`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `an_integer`
[INFO] [stderr]    --> src/main.rs:286:9
[INFO] [stderr]     |
[INFO] [stderr] 286 |     let an_integer = 5i32; // Suffix annotation
[INFO] [stderr]     |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_an_integer`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `default_float`
[INFO] [stderr]    --> src/main.rs:289:9
[INFO] [stderr]     |
[INFO] [stderr] 289 |     let default_float = 3.0; // `f64`
[INFO] [stderr]     |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_default_float`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `default_intager`
[INFO] [stderr]    --> src/main.rs:290:9
[INFO] [stderr]     |
[INFO] [stderr] 290 |     let default_intager = 7; // `i32`
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_default_intager`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `inferred_type` is assigned to, but never used
[INFO] [stderr]    --> src/main.rs:293:9
[INFO] [stderr]     |
[INFO] [stderr] 293 |     let mut inferred_type =  12; // Type i64 is inferred from another line
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: consider using `_inferred_type` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `inferred_type` is never read
[INFO] [stderr]    --> src/main.rs:294:5
[INFO] [stderr]     |
[INFO] [stderr] 294 |     inferred_type = 4294967296i64;
[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: variable `mutable` is assigned to, but never used
[INFO] [stderr]    --> src/main.rs:297:9
[INFO] [stderr]     |
[INFO] [stderr] 297 |     let mut mutable = 12; // Mutable `i32`
[INFO] [stderr]     |         ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: consider using `_mutable` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `mutable` is never read
[INFO] [stderr]    --> src/main.rs:298:5
[INFO] [stderr]     |
[INFO] [stderr] 298 |     mutable = 21;
[INFO] [stderr]     |     ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `mutable`
[INFO] [stderr]    --> src/main.rs:304:9
[INFO] [stderr]     |
[INFO] [stderr] 304 |     let mutable = true;
[INFO] [stderr]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mutable`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]    --> src/main.rs:613:9
[INFO] [stderr]     |
[INFO] [stderr] 613 |     let x = Operations::Add;
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]     --> src/main.rs:1471:25
[INFO] [stderr]      |
[INFO] [stderr] 1471 |     if let Foo_two::Qux(value @ 100) = c {
[INFO] [stderr]      |                         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `formatted`
[INFO] [stderr]   --> src/main.rs:44:4
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn formatted(){
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `debug`
[INFO] [stderr]   --> src/main.rs:93:4
[INFO] [stderr]    |
[INFO] [stderr] 93 | fn debug(){
[INFO] [stderr]    |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `display`
[INFO] [stderr]    --> src/main.rs:195:4
[INFO] [stderr]     |
[INFO] [stderr] 195 | fn display(){
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `formatting`
[INFO] [stderr]    --> src/main.rs:262:4
[INFO] [stderr]     |
[INFO] [stderr] 262 | fn formatting() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `primitives`
[INFO] [stderr]    --> src/main.rs:281:4
[INFO] [stderr]     |
[INFO] [stderr] 281 | fn primitives() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `lit_op`
[INFO] [stderr]    --> src/main.rs:309:4
[INFO] [stderr]     |
[INFO] [stderr] 309 | fn lit_op() {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `reverse`
[INFO] [stderr]    --> src/main.rs:335:4
[INFO] [stderr]     |
[INFO] [stderr] 335 | fn reverse(pair: (i32, bool)) -> (bool, i32) {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `transpose`
[INFO] [stderr]    --> src/main.rs:343:4
[INFO] [stderr]     |
[INFO] [stderr] 343 | fn transpose(matrix: Matrix) -> Matrix {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tuples`
[INFO] [stderr]    --> src/main.rs:363:4
[INFO] [stderr]     |
[INFO] [stderr] 363 | fn tuples() {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `analyze_slice`
[INFO] [stderr]    --> src/main.rs:405:4
[INFO] [stderr]     |
[INFO] [stderr] 405 | fn analyze_slice(slice: &[i32]) {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `arsli`
[INFO] [stderr]    --> src/main.rs:410:4
[INFO] [stderr]     |
[INFO] [stderr] 410 | fn arsli() {
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `NilOne`
[INFO] [stderr]    --> src/main.rs:453:8
[INFO] [stderr]     |
[INFO] [stderr] 453 | struct NilOne;
[INFO] [stderr]     |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Pair`
[INFO] [stderr]    --> src/main.rs:456:8
[INFO] [stderr]     |
[INFO] [stderr] 456 | struct Pair(i32, f32);
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `rect_area`
[INFO] [stderr]    --> src/main.rs:475:4
[INFO] [stderr]     |
[INFO] [stderr] 475 | fn rect_area (rect: &Rectangle) -> f32 {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `square`
[INFO] [stderr]    --> src/main.rs:483:4
[INFO] [stderr]     |
[INFO] [stderr] 483 | fn square(point: &Point, l: f32) -> Rectangle {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `structures`
[INFO] [stderr]    --> src/main.rs:491:4
[INFO] [stderr]     |
[INFO] [stderr] 491 | fn structures() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `WebEvent`
[INFO] [stderr]    --> src/main.rs:553:6
[INFO] [stderr]     |
[INFO] [stderr] 553 | enum WebEvent {
[INFO] [stderr]     |      ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `VeryVerboseEnumOfThingsToDoWithNumbers`
[INFO] [stderr]    --> src/main.rs:564:6
[INFO] [stderr]     |
[INFO] [stderr] 564 | enum VeryVerboseEnumOfThingsToDoWithNumbers {
[INFO] [stderr]     |      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `run`
[INFO] [stderr]    --> src/main.rs:570:5
[INFO] [stderr]     |
[INFO] [stderr] 570 |     fn run(&self, x: i32, y: i32) -> i32 {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `Operations`
[INFO] [stderr]    --> src/main.rs:579:1
[INFO] [stderr]     |
[INFO] [stderr] 579 | type Operations = VeryVerboseEnumOfThingsToDoWithNumbers;
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `inspect`
[INFO] [stderr]    --> src/main.rs:583:4
[INFO] [stderr]     |
[INFO] [stderr] 583 | fn inspect(event: WebEvent) {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `enums`
[INFO] [stderr]    --> src/main.rs:597:4
[INFO] [stderr]     |
[INFO] [stderr] 597 | fn enums() {
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Status`
[INFO] [stderr]    --> src/main.rs:619:6
[INFO] [stderr]     |
[INFO] [stderr] 619 | enum Status {
[INFO] [stderr]     |      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Work`
[INFO] [stderr]    --> src/main.rs:624:6
[INFO] [stderr]     |
[INFO] [stderr] 624 | enum Work {
[INFO] [stderr]     |      ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `enumUse`
[INFO] [stderr]    --> src/main.rs:629:4
[INFO] [stderr]     |
[INFO] [stderr] 629 | fn enumUse() {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Number`
[INFO] [stderr]    --> src/main.rs:657:6
[INFO] [stderr]     |
[INFO] [stderr] 657 | enum Number {
[INFO] [stderr]     |      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `ColorTwo`
[INFO] [stderr]    --> src/main.rs:664:6
[INFO] [stderr]     |
[INFO] [stderr] 664 | enum ColorTwo {
[INFO] [stderr]     |      ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `clike`
[INFO] [stderr]    --> src/main.rs:670:4
[INFO] [stderr]     |
[INFO] [stderr] 670 | fn clike() {
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `ListNew`
[INFO] [stderr]    --> src/main.rs:683:6
[INFO] [stderr]     |
[INFO] [stderr] 683 | enum ListNew {
[INFO] [stderr]     |      ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/main.rs:693:5
[INFO] [stderr]     |
[INFO] [stderr] 693 |     fn new() -> ListNew {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `prepend`
[INFO] [stderr]    --> src/main.rs:699:5
[INFO] [stderr]     |
[INFO] [stderr] 699 |     fn prepend(self, elem: u32) -> ListNew {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `len`
[INFO] [stderr]    --> src/main.rs:705:5
[INFO] [stderr]     |
[INFO] [stderr] 705 |     fn len(&self) -> u32 {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `stringify`
[INFO] [stderr]    --> src/main.rs:720:5
[INFO] [stderr]     |
[INFO] [stderr] 720 |     fn stringify(&self) -> String {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `enum_testcase`
[INFO] [stderr]    --> src/main.rs:734:4
[INFO] [stderr]     |
[INFO] [stderr] 734 | fn enum_testcase() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `LANGUAGE`
[INFO] [stderr]    --> src/main.rs:752:1
[INFO] [stderr]     |
[INFO] [stderr] 752 | static LANGUAGE: &str = "Rust";
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `THRESHOLD`
[INFO] [stderr]    --> src/main.rs:753:1
[INFO] [stderr]     |
[INFO] [stderr] 753 | const THRESHOLD: i32 = 10;
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_big`
[INFO] [stderr]    --> src/main.rs:755:4
[INFO] [stderr]     |
[INFO] [stderr] 755 | fn is_big(n: i32) -> bool {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `constants`
[INFO] [stderr]    --> src/main.rs:760:4
[INFO] [stderr]     |
[INFO] [stderr] 760 | fn constants() {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `varbind`
[INFO] [stderr]    --> src/main.rs:774:4
[INFO] [stderr]     |
[INFO] [stderr] 774 | fn varbind() {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `mutability`
[INFO] [stderr]    --> src/main.rs:795:4
[INFO] [stderr]     |
[INFO] [stderr] 795 | fn mutability() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `scope_shadow`
[INFO] [stderr]    --> src/main.rs:813:4
[INFO] [stderr]     |
[INFO] [stderr] 813 | fn scope_shadow() {
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `declare_first`
[INFO] [stderr]    --> src/main.rs:844:4
[INFO] [stderr]     |
[INFO] [stderr] 844 | fn declare_first() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `casting`
[INFO] [stderr]    --> src/main.rs:873:4
[INFO] [stderr]     |
[INFO] [stderr] 873 | fn casting() {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `literals`
[INFO] [stderr]    --> src/main.rs:920:4
[INFO] [stderr]     |
[INFO] [stderr] 920 | fn literals() {
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `inference`
[INFO] [stderr]    --> src/main.rs:940:4
[INFO] [stderr]     |
[INFO] [stderr] 940 | fn inference() {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `NanoSecond`
[INFO] [stderr]    --> src/main.rs:958:1
[INFO] [stderr]     |
[INFO] [stderr] 958 | type NanoSecond = u64;
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `Inch`
[INFO] [stderr]    --> src/main.rs:959:1
[INFO] [stderr]     |
[INFO] [stderr] 959 | type Inch = u64;
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `aliasing`
[INFO] [stderr]    --> src/main.rs:963:4
[INFO] [stderr]     |
[INFO] [stderr] 963 | fn aliasing() {
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `from_and_into`
[INFO] [stderr]    --> src/main.rs:990:4
[INFO] [stderr]     |
[INFO] [stderr] 990 | fn from_and_into() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tryfrom_tryinto`
[INFO] [stderr]     --> src/main.rs:1020:4
[INFO] [stderr]      |
[INFO] [stderr] 1020 | fn tryfrom_tryinto() {
[INFO] [stderr]      |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `to_from_strings`
[INFO] [stderr]     --> src/main.rs:1048:4
[INFO] [stderr]      |
[INFO] [stderr] 1048 | fn to_from_strings() {
[INFO] [stderr]      |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Color3`
[INFO] [stderr]     --> src/main.rs:1062:6
[INFO] [stderr]      |
[INFO] [stderr] 1062 | enum Color3 {
[INFO] [stderr]      |      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `age`
[INFO] [stderr]     --> src/main.rs:1076:4
[INFO] [stderr]      |
[INFO] [stderr] 1076 | fn age() -> u32 {
[INFO] [stderr]      |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `some_number`
[INFO] [stderr]     --> src/main.rs:1080:4
[INFO] [stderr]      |
[INFO] [stderr] 1080 | fn some_number() -> Option<u32> {
[INFO] [stderr]      |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Foo_two`
[INFO] [stderr]     --> src/main.rs:1084:6
[INFO] [stderr]      |
[INFO] [stderr] 1084 | enum Foo_two {
[INFO] [stderr]      |      ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `flow_control`
[INFO] [stderr]     --> src/main.rs:1090:4
[INFO] [stderr]      |
[INFO] [stderr] 1090 | fn flow_control() {
[INFO] [stderr]      |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `enumUse` should have a snake case name
[INFO] [stderr]    --> src/main.rs:629:4
[INFO] [stderr]     |
[INFO] [stderr] 629 | fn enumUse() {
[INFO] [stderr]     |    ^^^^^^^ help: convert the identifier to snake case: `enum_use`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 71 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `formatted`
[INFO] [stderr]   --> src/main.rs:44:4
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn formatted(){
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `debug`
[INFO] [stderr]   --> src/main.rs:93:4
[INFO] [stderr]    |
[INFO] [stderr] 93 | fn debug(){
[INFO] [stderr]    |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `display`
[INFO] [stderr]    --> src/main.rs:195:4
[INFO] [stderr]     |
[INFO] [stderr] 195 | fn display(){
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `formatting`
[INFO] [stderr]    --> src/main.rs:262:4
[INFO] [stderr]     |
[INFO] [stderr] 262 | fn formatting() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `primitives`
[INFO] [stderr]    --> src/main.rs:281:4
[INFO] [stderr]     |
[INFO] [stderr] 281 | fn primitives() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `lit_op`
[INFO] [stderr]    --> src/main.rs:309:4
[INFO] [stderr]     |
[INFO] [stderr] 309 | fn lit_op() {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `reverse`
[INFO] [stderr]    --> src/main.rs:335:4
[INFO] [stderr]     |
[INFO] [stderr] 335 | fn reverse(pair: (i32, bool)) -> (bool, i32) {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `transpose`
[INFO] [stderr]    --> src/main.rs:343:4
[INFO] [stderr]     |
[INFO] [stderr] 343 | fn transpose(matrix: Matrix) -> Matrix {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tuples`
[INFO] [stderr]    --> src/main.rs:363:4
[INFO] [stderr]     |
[INFO] [stderr] 363 | fn tuples() {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `analyze_slice`
[INFO] [stderr]    --> src/main.rs:405:4
[INFO] [stderr]     |
[INFO] [stderr] 405 | fn analyze_slice(slice: &[i32]) {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `arsli`
[INFO] [stderr]    --> src/main.rs:410:4
[INFO] [stderr]     |
[INFO] [stderr] 410 | fn arsli() {
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `NilOne`
[INFO] [stderr]    --> src/main.rs:453:8
[INFO] [stderr]     |
[INFO] [stderr] 453 | struct NilOne;
[INFO] [stderr]     |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Pair`
[INFO] [stderr]    --> src/main.rs:456:8
[INFO] [stderr]     |
[INFO] [stderr] 456 | struct Pair(i32, f32);
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `rect_area`
[INFO] [stderr]    --> src/main.rs:475:4
[INFO] [stderr]     |
[INFO] [stderr] 475 | fn rect_area (rect: &Rectangle) -> f32 {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `square`
[INFO] [stderr]    --> src/main.rs:483:4
[INFO] [stderr]     |
[INFO] [stderr] 483 | fn square(point: &Point, l: f32) -> Rectangle {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `structures`
[INFO] [stderr]    --> src/main.rs:491:4
[INFO] [stderr]     |
[INFO] [stderr] 491 | fn structures() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `WebEvent`
[INFO] [stderr]    --> src/main.rs:553:6
[INFO] [stderr]     |
[INFO] [stderr] 553 | enum WebEvent {
[INFO] [stderr]     |      ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `VeryVerboseEnumOfThingsToDoWithNumbers`
[INFO] [stderr]    --> src/main.rs:564:6
[INFO] [stderr]     |
[INFO] [stderr] 564 | enum VeryVerboseEnumOfThingsToDoWithNumbers {
[INFO] [stderr]     |      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `run`
[INFO] [stderr]    --> src/main.rs:570:5
[INFO] [stderr]     |
[INFO] [stderr] 570 |     fn run(&self, x: i32, y: i32) -> i32 {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `Operations`
[INFO] [stderr]    --> src/main.rs:579:1
[INFO] [stderr]     |
[INFO] [stderr] 579 | type Operations = VeryVerboseEnumOfThingsToDoWithNumbers;
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `inspect`
[INFO] [stderr]    --> src/main.rs:583:4
[INFO] [stderr]     |
[INFO] [stderr] 583 | fn inspect(event: WebEvent) {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `enums`
[INFO] [stderr]    --> src/main.rs:597:4
[INFO] [stderr]     |
[INFO] [stderr] 597 | fn enums() {
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Status`
[INFO] [stderr]    --> src/main.rs:619:6
[INFO] [stderr]     |
[INFO] [stderr] 619 | enum Status {
[INFO] [stderr]     |      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Work`
[INFO] [stderr]    --> src/main.rs:624:6
[INFO] [stderr]     |
[INFO] [stderr] 624 | enum Work {
[INFO] [stderr]     |      ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `enumUse`
[INFO] [stderr]    --> src/main.rs:629:4
[INFO] [stderr]     |
[INFO] [stderr] 629 | fn enumUse() {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Number`
[INFO] [stderr]    --> src/main.rs:657:6
[INFO] [stderr]     |
[INFO] [stderr] 657 | enum Number {
[INFO] [stderr]     |      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `ColorTwo`
[INFO] [stderr]    --> src/main.rs:664:6
[INFO] [stderr]     |
[INFO] [stderr] 664 | enum ColorTwo {
[INFO] [stderr]     |      ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `clike`
[INFO] [stderr]    --> src/main.rs:670:4
[INFO] [stderr]     |
[INFO] [stderr] 670 | fn clike() {
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `ListNew`
[INFO] [stderr]    --> src/main.rs:683:6
[INFO] [stderr]     |
[INFO] [stderr] 683 | enum ListNew {
[INFO] [stderr]     |      ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/main.rs:693:5
[INFO] [stderr]     |
[INFO] [stderr] 693 |     fn new() -> ListNew {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `prepend`
[INFO] [stderr]    --> src/main.rs:699:5
[INFO] [stderr]     |
[INFO] [stderr] 699 |     fn prepend(self, elem: u32) -> ListNew {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `len`
[INFO] [stderr]    --> src/main.rs:705:5
[INFO] [stderr]     |
[INFO] [stderr] 705 |     fn len(&self) -> u32 {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `stringify`
[INFO] [stderr]    --> src/main.rs:720:5
[INFO] [stderr]     |
[INFO] [stderr] 720 |     fn stringify(&self) -> String {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `enum_testcase`
[INFO] [stderr]    --> src/main.rs:734:4
[INFO] [stderr]     |
[INFO] [stderr] 734 | fn enum_testcase() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `LANGUAGE`
[INFO] [stderr]    --> src/main.rs:752:1
[INFO] [stderr]     |
[INFO] [stderr] 752 | static LANGUAGE: &str = "Rust";
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `THRESHOLD`
[INFO] [stderr]    --> src/main.rs:753:1
[INFO] [stderr]     |
[INFO] [stderr] 753 | const THRESHOLD: i32 = 10;
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_big`
[INFO] [stderr]    --> src/main.rs:755:4
[INFO] [stderr]     |
[INFO] [stderr] 755 | fn is_big(n: i32) -> bool {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `constants`
[INFO] [stderr]    --> src/main.rs:760:4
[INFO] [stderr]     |
[INFO] [stderr] 760 | fn constants() {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `varbind`
[INFO] [stderr]    --> src/main.rs:774:4
[INFO] [stderr]     |
[INFO] [stderr] 774 | fn varbind() {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `mutability`
[INFO] [stderr]    --> src/main.rs:795:4
[INFO] [stderr]     |
[INFO] [stderr] 795 | fn mutability() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `scope_shadow`
[INFO] [stderr]    --> src/main.rs:813:4
[INFO] [stderr]     |
[INFO] [stderr] 813 | fn scope_shadow() {
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `declare_first`
[INFO] [stderr]    --> src/main.rs:844:4
[INFO] [stderr]     |
[INFO] [stderr] 844 | fn declare_first() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `casting`
[INFO] [stderr]    --> src/main.rs:873:4
[INFO] [stderr]     |
[INFO] [stderr] 873 | fn casting() {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `literals`
[INFO] [stderr]    --> src/main.rs:920:4
[INFO] [stderr]     |
[INFO] [stderr] 920 | fn literals() {
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `inference`
[INFO] [stderr]    --> src/main.rs:940:4
[INFO] [stderr]     |
[INFO] [stderr] 940 | fn inference() {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `NanoSecond`
[INFO] [stderr]    --> src/main.rs:958:1
[INFO] [stderr]     |
[INFO] [stderr] 958 | type NanoSecond = u64;
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `Inch`
[INFO] [stderr]    --> src/main.rs:959:1
[INFO] [stderr]     |
[INFO] [stderr] 959 | type Inch = u64;
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `aliasing`
[INFO] [stderr]    --> src/main.rs:963:4
[INFO] [stderr]     |
[INFO] [stderr] 963 | fn aliasing() {
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `from_and_into`
[INFO] [stderr]    --> src/main.rs:990:4
[INFO] [stderr]     |
[INFO] [stderr] 990 | fn from_and_into() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tryfrom_tryinto`
[INFO] [stderr]     --> src/main.rs:1020:4
[INFO] [stderr]      |
[INFO] [stderr] 1020 | fn tryfrom_tryinto() {
[INFO] [stderr]      |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `to_from_strings`
[INFO] [stderr]     --> src/main.rs:1048:4
[INFO] [stderr]      |
[INFO] [stderr] 1048 | fn to_from_strings() {
[INFO] [stderr]      |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Color3`
[INFO] [stderr]     --> src/main.rs:1062:6
[INFO] [stderr]      |
[INFO] [stderr] 1062 | enum Color3 {
[INFO] [stderr]      |      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `age`
[INFO] [stderr]     --> src/main.rs:1076:4
[INFO] [stderr]      |
[INFO] [stderr] 1076 | fn age() -> u32 {
[INFO] [stderr]      |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `some_number`
[INFO] [stderr]     --> src/main.rs:1080:4
[INFO] [stderr]      |
[INFO] [stderr] 1080 | fn some_number() -> Option<u32> {
[INFO] [stderr]      |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Foo_two`
[INFO] [stderr]     --> src/main.rs:1084:6
[INFO] [stderr]      |
[INFO] [stderr] 1084 | enum Foo_two {
[INFO] [stderr]      |      ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `flow_control`
[INFO] [stderr]     --> src/main.rs:1090:4
[INFO] [stderr]      |
[INFO] [stderr] 1090 | fn flow_control() {
[INFO] [stderr]      |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `enumUse` should have a snake case name
[INFO] [stderr]    --> src/main.rs:629:4
[INFO] [stderr]     |
[INFO] [stderr] 629 | fn enumUse() {
[INFO] [stderr]     |    ^^^^^^^ help: convert the identifier to snake case: `enum_use`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 71 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.44s
[INFO] running `"docker" "inspect" "b47adb2bb7c939bc893c3c98ffa7c082818f3d6ce2b7cedc2279e20a7639183c"`
[INFO] running `"docker" "rm" "-f" "b47adb2bb7c939bc893c3c98ffa7c082818f3d6ce2b7cedc2279e20a7639183c"`
[INFO] [stdout] b47adb2bb7c939bc893c3c98ffa7c082818f3d6ce2b7cedc2279e20a7639183c