[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] 0ba8b97f79664bbdf148d8b35fdb8fdddb7c4f81
[INFO] testing happychameleon/rust_practice against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhappychameleon%2Frust_practice" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/happychameleon/rust_practice on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/happychameleon/rust_practice
[INFO] finished tweaking git repo https://github.com/happychameleon/rust_practice
[INFO] tweaked toml for git repo https://github.com/happychameleon/rust_practice written to /workspace/builds/worker-7/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" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e817f324a7f8165f63295eb34a07640226a064f3d0a1908b7f7391aad8a61e69
[INFO] running `"docker" "start" "-a" "e817f324a7f8165f63295eb34a07640226a064f3d0a1908b7f7391aad8a61e69"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling 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:1088:6
[INFO] [stderr]      |
[INFO] [stderr] 1088 | 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:1150:9
[INFO] [stderr]      |
[INFO] [stderr] 1150 |         'inner: loop {
[INFO] [stderr]      |         ^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_labels)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `Point_new` should have an upper camel case name
[INFO] [stderr]     --> src/main.rs:1551:8
[INFO] [stderr]      |
[INFO] [stderr] 1551 | struct Point_new {
[INFO] [stderr]      |        ^^^^^^^^^ help: convert the identifier to upper camel case: `PointNew`
[INFO] [stderr] 
[INFO] [stderr] warning: type `Rectangle_new` should have an upper camel case name
[INFO] [stderr]     --> src/main.rs:1571:8
[INFO] [stderr]      |
[INFO] [stderr] 1571 | struct Rectangle_new {
[INFO] [stderr]      |        ^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `RectangleNew`
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> src/main.rs:1587:9
[INFO] [stderr]      |
[INFO] [stderr] 1587 |         ((x1 - x2).abs() + (y1 - y2).abs())
[INFO] [stderr]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `Pair_new` should have an upper camel case name
[INFO] [stderr]     --> src/main.rs:1609:8
[INFO] [stderr]      |
[INFO] [stderr] 1609 | struct Pair_new(Box<i32>, Box<i32>);
[INFO] [stderr]      |        ^^^^^^^^ help: convert the identifier to upper camel case: `PairNew`
[INFO] [stderr] 
[INFO] [stderr] warning: the item `mem` is imported redundantly
[INFO] [stderr]     --> src/main.rs:1734:9
[INFO] [stderr]      |
[INFO] [stderr] 406  | use std::mem;
[INFO] [stderr]      |     -------- the item `mem` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 1734 |     use std::mem;
[INFO] [stderr]      |         ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `logical`
[INFO] [stderr]    --> src/main.rs:287:9
[INFO] [stderr]     |
[INFO] [stderr] 287 |     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:289:9
[INFO] [stderr]     |
[INFO] [stderr] 289 |     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:290:9
[INFO] [stderr]     |
[INFO] [stderr] 290 |     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:293:9
[INFO] [stderr]     |
[INFO] [stderr] 293 |     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:294:9
[INFO] [stderr]     |
[INFO] [stderr] 294 |     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:297:9
[INFO] [stderr]     |
[INFO] [stderr] 297 |     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:298:5
[INFO] [stderr]     |
[INFO] [stderr] 298 |     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:301:9
[INFO] [stderr]     |
[INFO] [stderr] 301 |     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:302:5
[INFO] [stderr]     |
[INFO] [stderr] 302 |     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:308:9
[INFO] [stderr]     |
[INFO] [stderr] 308 |     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:617:9
[INFO] [stderr]     |
[INFO] [stderr] 617 |     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:1475:25
[INFO] [stderr]      |
[INFO] [stderr] 1475 |     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:48:4
[INFO] [stderr]    |
[INFO] [stderr] 48 | 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:97:4
[INFO] [stderr]    |
[INFO] [stderr] 97 | fn debug(){
[INFO] [stderr]    |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `display`
[INFO] [stderr]    --> src/main.rs:199:4
[INFO] [stderr]     |
[INFO] [stderr] 199 | fn display(){
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `formatting`
[INFO] [stderr]    --> src/main.rs:266:4
[INFO] [stderr]     |
[INFO] [stderr] 266 | fn formatting() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `primitives`
[INFO] [stderr]    --> src/main.rs:285:4
[INFO] [stderr]     |
[INFO] [stderr] 285 | fn primitives() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `lit_op`
[INFO] [stderr]    --> src/main.rs:313:4
[INFO] [stderr]     |
[INFO] [stderr] 313 | fn lit_op() {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `reverse`
[INFO] [stderr]    --> src/main.rs:339:4
[INFO] [stderr]     |
[INFO] [stderr] 339 | fn reverse(pair: (i32, bool)) -> (bool, i32) {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `transpose`
[INFO] [stderr]    --> src/main.rs:347:4
[INFO] [stderr]     |
[INFO] [stderr] 347 | fn transpose(matrix: Matrix) -> Matrix {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tuples`
[INFO] [stderr]    --> src/main.rs:367:4
[INFO] [stderr]     |
[INFO] [stderr] 367 | fn tuples() {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `analyze_slice`
[INFO] [stderr]    --> src/main.rs:409:4
[INFO] [stderr]     |
[INFO] [stderr] 409 | fn analyze_slice(slice: &[i32]) {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `arsli`
[INFO] [stderr]    --> src/main.rs:414:4
[INFO] [stderr]     |
[INFO] [stderr] 414 | fn arsli() {
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `NilOne`
[INFO] [stderr]    --> src/main.rs:457:8
[INFO] [stderr]     |
[INFO] [stderr] 457 | struct NilOne;
[INFO] [stderr]     |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Pair`
[INFO] [stderr]    --> src/main.rs:460:8
[INFO] [stderr]     |
[INFO] [stderr] 460 | struct Pair(i32, f32);
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `rect_area`
[INFO] [stderr]    --> src/main.rs:479:4
[INFO] [stderr]     |
[INFO] [stderr] 479 | fn rect_area (rect: &Rectangle) -> f32 {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `square`
[INFO] [stderr]    --> src/main.rs:487:4
[INFO] [stderr]     |
[INFO] [stderr] 487 | fn square(point: &Point, l: f32) -> Rectangle {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `structures`
[INFO] [stderr]    --> src/main.rs:495:4
[INFO] [stderr]     |
[INFO] [stderr] 495 | fn structures() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `WebEvent`
[INFO] [stderr]    --> src/main.rs:557:6
[INFO] [stderr]     |
[INFO] [stderr] 557 | enum WebEvent {
[INFO] [stderr]     |      ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `VeryVerboseEnumOfThingsToDoWithNumbers`
[INFO] [stderr]    --> src/main.rs:568:6
[INFO] [stderr]     |
[INFO] [stderr] 568 | enum VeryVerboseEnumOfThingsToDoWithNumbers {
[INFO] [stderr]     |      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `run`
[INFO] [stderr]    --> src/main.rs:574:5
[INFO] [stderr]     |
[INFO] [stderr] 574 |     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:583:1
[INFO] [stderr]     |
[INFO] [stderr] 583 | type Operations = VeryVerboseEnumOfThingsToDoWithNumbers;
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `inspect`
[INFO] [stderr]    --> src/main.rs:587:4
[INFO] [stderr]     |
[INFO] [stderr] 587 | fn inspect(event: WebEvent) {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `enums`
[INFO] [stderr]    --> src/main.rs:601:4
[INFO] [stderr]     |
[INFO] [stderr] 601 | fn enums() {
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Status`
[INFO] [stderr]    --> src/main.rs:623:6
[INFO] [stderr]     |
[INFO] [stderr] 623 | enum Status {
[INFO] [stderr]     |      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Work`
[INFO] [stderr]    --> src/main.rs:628:6
[INFO] [stderr]     |
[INFO] [stderr] 628 | enum Work {
[INFO] [stderr]     |      ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `enumUse`
[INFO] [stderr]    --> src/main.rs:633:4
[INFO] [stderr]     |
[INFO] [stderr] 633 | fn enumUse() {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Number`
[INFO] [stderr]    --> src/main.rs:661:6
[INFO] [stderr]     |
[INFO] [stderr] 661 | enum Number {
[INFO] [stderr]     |      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `ColorTwo`
[INFO] [stderr]    --> src/main.rs:668:6
[INFO] [stderr]     |
[INFO] [stderr] 668 | enum ColorTwo {
[INFO] [stderr]     |      ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `clike`
[INFO] [stderr]    --> src/main.rs:674:4
[INFO] [stderr]     |
[INFO] [stderr] 674 | fn clike() {
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `ListNew`
[INFO] [stderr]    --> src/main.rs:687:6
[INFO] [stderr]     |
[INFO] [stderr] 687 | enum ListNew {
[INFO] [stderr]     |      ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/main.rs:697:5
[INFO] [stderr]     |
[INFO] [stderr] 697 |     fn new() -> ListNew {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `prepend`
[INFO] [stderr]    --> src/main.rs:703:5
[INFO] [stderr]     |
[INFO] [stderr] 703 |     fn prepend(self, elem: u32) -> ListNew {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `len`
[INFO] [stderr]    --> src/main.rs:709:5
[INFO] [stderr]     |
[INFO] [stderr] 709 |     fn len(&self) -> u32 {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `stringify`
[INFO] [stderr]    --> src/main.rs:724:5
[INFO] [stderr]     |
[INFO] [stderr] 724 |     fn stringify(&self) -> String {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `enum_testcase`
[INFO] [stderr]    --> src/main.rs:738:4
[INFO] [stderr]     |
[INFO] [stderr] 738 | fn enum_testcase() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `LANGUAGE`
[INFO] [stderr]    --> src/main.rs:756:1
[INFO] [stderr]     |
[INFO] [stderr] 756 | static LANGUAGE: &str = "Rust";
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `THRESHOLD`
[INFO] [stderr]    --> src/main.rs:757:1
[INFO] [stderr]     |
[INFO] [stderr] 757 | const THRESHOLD: i32 = 10;
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_big`
[INFO] [stderr]    --> src/main.rs:759:4
[INFO] [stderr]     |
[INFO] [stderr] 759 | fn is_big(n: i32) -> bool {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `constants`
[INFO] [stderr]    --> src/main.rs:764:4
[INFO] [stderr]     |
[INFO] [stderr] 764 | fn constants() {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `varbind`
[INFO] [stderr]    --> src/main.rs:778:4
[INFO] [stderr]     |
[INFO] [stderr] 778 | fn varbind() {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `mutability`
[INFO] [stderr]    --> src/main.rs:799:4
[INFO] [stderr]     |
[INFO] [stderr] 799 | fn mutability() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `scope_shadow`
[INFO] [stderr]    --> src/main.rs:817:4
[INFO] [stderr]     |
[INFO] [stderr] 817 | fn scope_shadow() {
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `declare_first`
[INFO] [stderr]    --> src/main.rs:848:4
[INFO] [stderr]     |
[INFO] [stderr] 848 | fn declare_first() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `casting`
[INFO] [stderr]    --> src/main.rs:877:4
[INFO] [stderr]     |
[INFO] [stderr] 877 | fn casting() {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `literals`
[INFO] [stderr]    --> src/main.rs:924:4
[INFO] [stderr]     |
[INFO] [stderr] 924 | fn literals() {
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `inference`
[INFO] [stderr]    --> src/main.rs:944:4
[INFO] [stderr]     |
[INFO] [stderr] 944 | fn inference() {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `NanoSecond`
[INFO] [stderr]    --> src/main.rs:962:1
[INFO] [stderr]     |
[INFO] [stderr] 962 | type NanoSecond = u64;
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `Inch`
[INFO] [stderr]    --> src/main.rs:963:1
[INFO] [stderr]     |
[INFO] [stderr] 963 | type Inch = u64;
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `aliasing`
[INFO] [stderr]    --> src/main.rs:967:4
[INFO] [stderr]     |
[INFO] [stderr] 967 | fn aliasing() {
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `from_and_into`
[INFO] [stderr]    --> src/main.rs:994:4
[INFO] [stderr]     |
[INFO] [stderr] 994 | fn from_and_into() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tryfrom_tryinto`
[INFO] [stderr]     --> src/main.rs:1024:4
[INFO] [stderr]      |
[INFO] [stderr] 1024 | fn tryfrom_tryinto() {
[INFO] [stderr]      |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `to_from_strings`
[INFO] [stderr]     --> src/main.rs:1052:4
[INFO] [stderr]      |
[INFO] [stderr] 1052 | fn to_from_strings() {
[INFO] [stderr]      |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Color3`
[INFO] [stderr]     --> src/main.rs:1066:6
[INFO] [stderr]      |
[INFO] [stderr] 1066 | enum Color3 {
[INFO] [stderr]      |      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `age`
[INFO] [stderr]     --> src/main.rs:1080:4
[INFO] [stderr]      |
[INFO] [stderr] 1080 | fn age() -> u32 {
[INFO] [stderr]      |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `some_number`
[INFO] [stderr]     --> src/main.rs:1084:4
[INFO] [stderr]      |
[INFO] [stderr] 1084 | fn some_number() -> Option<u32> {
[INFO] [stderr]      |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Foo_two`
[INFO] [stderr]     --> src/main.rs:1088:6
[INFO] [stderr]      |
[INFO] [stderr] 1088 | enum Foo_two {
[INFO] [stderr]      |      ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `flow_control`
[INFO] [stderr]     --> src/main.rs:1094:4
[INFO] [stderr]      |
[INFO] [stderr] 1094 | fn flow_control() {
[INFO] [stderr]      |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `functioned_fizzbuzz`
[INFO] [stderr]     --> src/main.rs:1510:4
[INFO] [stderr]      |
[INFO] [stderr] 1510 | fn functioned_fizzbuzz() {
[INFO] [stderr]      |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_divisible_by`
[INFO] [stderr]     --> src/main.rs:1516:4
[INFO] [stderr]      |
[INFO] [stderr] 1516 | fn is_divisible_by(lhs: u32, rhs: u32) -> bool {
[INFO] [stderr]      |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fizzbuzz`
[INFO] [stderr]     --> src/main.rs:1527:4
[INFO] [stderr]      |
[INFO] [stderr] 1527 | fn fizzbuzz(n: u32) -> () {
[INFO] [stderr]      |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fizzbuzz_to`
[INFO] [stderr]     --> src/main.rs:1541:4
[INFO] [stderr]      |
[INFO] [stderr] 1541 | fn fizzbuzz_to(n: u32) {
[INFO] [stderr]      |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Point_new`
[INFO] [stderr]     --> src/main.rs:1551:8
[INFO] [stderr]      |
[INFO] [stderr] 1551 | struct Point_new {
[INFO] [stderr]      |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `origin`
[INFO] [stderr]     --> src/main.rs:1561:5
[INFO] [stderr]      |
[INFO] [stderr] 1561 |     fn origin() -> Point_new {
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]     --> src/main.rs:1566:5
[INFO] [stderr]      |
[INFO] [stderr] 1566 |     fn new( x: f64, y: f64 ) -> Point_new {
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Rectangle_new`
[INFO] [stderr]     --> src/main.rs:1571:8
[INFO] [stderr]      |
[INFO] [stderr] 1571 | struct Rectangle_new {
[INFO] [stderr]      |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `area`
[INFO] [stderr]     --> src/main.rs:1580:5
[INFO] [stderr]      |
[INFO] [stderr] 1580 |     fn area(&self) -> f64 {
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `perimeter`
[INFO] [stderr]     --> src/main.rs:1590:5
[INFO] [stderr]      |
[INFO] [stderr] 1590 |     fn perimeter(&self) -> f64 {
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `translate`
[INFO] [stderr]     --> src/main.rs:1599:5
[INFO] [stderr]      |
[INFO] [stderr] 1599 |     fn translate(&mut self, x: f64, y: f64) {
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Pair_new`
[INFO] [stderr]     --> src/main.rs:1609:8
[INFO] [stderr]      |
[INFO] [stderr] 1609 | struct Pair_new(Box<i32>, Box<i32>);
[INFO] [stderr]      |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `destroy`
[INFO] [stderr]     --> src/main.rs:1614:5
[INFO] [stderr]      |
[INFO] [stderr] 1614 |     fn destroy(self) {
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `methods`
[INFO] [stderr]     --> src/main.rs:1624:4
[INFO] [stderr]      |
[INFO] [stderr] 1624 | fn methods() {
[INFO] [stderr]      |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `apply`
[INFO] [stderr]     --> src/main.rs:1653:4
[INFO] [stderr]      |
[INFO] [stderr] 1653 | fn apply<F>(f: F) where
[INFO] [stderr]      |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `apply_to_3`
[INFO] [stderr]     --> src/main.rs:1661:4
[INFO] [stderr]      |
[INFO] [stderr] 1661 | fn apply_to_3<F>(f: F) -> i32 where
[INFO] [stderr]      |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `apply_fn`
[INFO] [stderr]     --> src/main.rs:1670:4
[INFO] [stderr]      |
[INFO] [stderr] 1670 | fn apply_fn<F>(f: F) where
[INFO] [stderr]      |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `call_me`
[INFO] [stderr]     --> src/main.rs:1677:4
[INFO] [stderr]      |
[INFO] [stderr] 1677 | fn call_me<F: Fn()>(f: F) {
[INFO] [stderr]      |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `example_function`
[INFO] [stderr]     --> src/main.rs:1682:4
[INFO] [stderr]      |
[INFO] [stderr] 1682 | fn example_function() {
[INFO] [stderr]      |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `create_fn`
[INFO] [stderr]     --> src/main.rs:1686:4
[INFO] [stderr]      |
[INFO] [stderr] 1686 | fn create_fn() -> impl Fn() {
[INFO] [stderr]      |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `create_fnmut`
[INFO] [stderr]     --> src/main.rs:1692:4
[INFO] [stderr]      |
[INFO] [stderr] 1692 | fn create_fnmut() -> impl FnMut() {
[INFO] [stderr]      |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `create_fnonce`
[INFO] [stderr]     --> src/main.rs:1698:4
[INFO] [stderr]      |
[INFO] [stderr] 1698 | fn create_fnonce() -> impl FnOnce() {
[INFO] [stderr]      |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `closures`
[INFO] [stderr]     --> src/main.rs:1704:4
[INFO] [stderr]      |
[INFO] [stderr] 1704 | fn closures() {
[INFO] [stderr]      |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_odd`
[INFO] [stderr]     --> src/main.rs:1929:4
[INFO] [stderr]      |
[INFO] [stderr] 1929 | fn is_odd(n: u32) -> bool {
[INFO] [stderr]      |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `hof`
[INFO] [stderr]     --> src/main.rs:1933:4
[INFO] [stderr]      |
[INFO] [stderr] 1933 | fn hof() {
[INFO] [stderr]      |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stderr]     --> src/main.rs:1890:40
[INFO] [stderr]      |
[INFO] [stderr] 1890 |     println!("2 in array2: {}", array2.into_iter().any(|&x| x == 2));
[INFO] [stderr]      |                                        ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(array_into_iter)]` on by default
[INFO] [stderr]      = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]      = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stderr] 
[INFO] [stderr] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stderr]     --> src/main.rs:1915:47
[INFO] [stderr]      |
[INFO] [stderr] 1915 |     println!("Find 2 in array4: {:?}", array4.into_iter().find(|&&x| x == 2));
[INFO] [stderr]      |                                               ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stderr]      |
[INFO] [stderr]      = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]      = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stderr] 
[INFO] [stderr] warning: function `enumUse` should have a snake case name
[INFO] [stderr]    --> src/main.rs:633:4
[INFO] [stderr]     |
[INFO] [stderr] 633 | 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: 103 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.22s
[INFO] running `"docker" "inspect" "e817f324a7f8165f63295eb34a07640226a064f3d0a1908b7f7391aad8a61e69"`
[INFO] running `"docker" "rm" "-f" "e817f324a7f8165f63295eb34a07640226a064f3d0a1908b7f7391aad8a61e69"`
[INFO] [stdout] e817f324a7f8165f63295eb34a07640226a064f3d0a1908b7f7391aad8a61e69
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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" "+1.44.0" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 3759ad9bed5a3242079ae3b02826b650e8c54ae6afef9d363e7b9f41fdf2e5a7
[INFO] running `"docker" "start" "-a" "3759ad9bed5a3242079ae3b02826b650e8c54ae6afef9d363e7b9f41fdf2e5a7"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling 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:1088:6
[INFO] [stderr]      |
[INFO] [stderr] 1088 | 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:1150:9
[INFO] [stderr]      |
[INFO] [stderr] 1150 |         'inner: loop {
[INFO] [stderr]      |         ^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_labels)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `Point_new` should have an upper camel case name
[INFO] [stderr]     --> src/main.rs:1551:8
[INFO] [stderr]      |
[INFO] [stderr] 1551 | struct Point_new {
[INFO] [stderr]      |        ^^^^^^^^^ help: convert the identifier to upper camel case: `PointNew`
[INFO] [stderr] 
[INFO] [stderr] warning: type `Rectangle_new` should have an upper camel case name
[INFO] [stderr]     --> src/main.rs:1571:8
[INFO] [stderr]      |
[INFO] [stderr] 1571 | struct Rectangle_new {
[INFO] [stderr]      |        ^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `RectangleNew`
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> src/main.rs:1587:9
[INFO] [stderr]      |
[INFO] [stderr] 1587 |         ((x1 - x2).abs() + (y1 - y2).abs())
[INFO] [stderr]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `Pair_new` should have an upper camel case name
[INFO] [stderr]     --> src/main.rs:1609:8
[INFO] [stderr]      |
[INFO] [stderr] 1609 | struct Pair_new(Box<i32>, Box<i32>);
[INFO] [stderr]      |        ^^^^^^^^ help: convert the identifier to upper camel case: `PairNew`
[INFO] [stderr] 
[INFO] [stderr] warning: the item `mem` is imported redundantly
[INFO] [stderr]     --> src/main.rs:1734:9
[INFO] [stderr]      |
[INFO] [stderr] 406  | use std::mem;
[INFO] [stderr]      |     -------- the item `mem` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 1734 |     use std::mem;
[INFO] [stderr]      |         ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `logical`
[INFO] [stderr]    --> src/main.rs:287:9
[INFO] [stderr]     |
[INFO] [stderr] 287 |     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:289:9
[INFO] [stderr]     |
[INFO] [stderr] 289 |     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:290:9
[INFO] [stderr]     |
[INFO] [stderr] 290 |     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:293:9
[INFO] [stderr]     |
[INFO] [stderr] 293 |     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:294:9
[INFO] [stderr]     |
[INFO] [stderr] 294 |     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:297:9
[INFO] [stderr]     |
[INFO] [stderr] 297 |     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:298:5
[INFO] [stderr]     |
[INFO] [stderr] 298 |     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:301:9
[INFO] [stderr]     |
[INFO] [stderr] 301 |     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:302:5
[INFO] [stderr]     |
[INFO] [stderr] 302 |     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:308:9
[INFO] [stderr]     |
[INFO] [stderr] 308 |     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:617:9
[INFO] [stderr]     |
[INFO] [stderr] 617 |     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:1475:25
[INFO] [stderr]      |
[INFO] [stderr] 1475 |     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:48:4
[INFO] [stderr]    |
[INFO] [stderr] 48 | 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:97:4
[INFO] [stderr]    |
[INFO] [stderr] 97 | fn debug(){
[INFO] [stderr]    |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `display`
[INFO] [stderr]    --> src/main.rs:199:4
[INFO] [stderr]     |
[INFO] [stderr] 199 | fn display(){
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `formatting`
[INFO] [stderr]    --> src/main.rs:266:4
[INFO] [stderr]     |
[INFO] [stderr] 266 | fn formatting() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `primitives`
[INFO] [stderr]    --> src/main.rs:285:4
[INFO] [stderr]     |
[INFO] [stderr] 285 | fn primitives() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `lit_op`
[INFO] [stderr]    --> src/main.rs:313:4
[INFO] [stderr]     |
[INFO] [stderr] 313 | fn lit_op() {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `reverse`
[INFO] [stderr]    --> src/main.rs:339:4
[INFO] [stderr]     |
[INFO] [stderr] 339 | fn reverse(pair: (i32, bool)) -> (bool, i32) {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `transpose`
[INFO] [stderr]    --> src/main.rs:347:4
[INFO] [stderr]     |
[INFO] [stderr] 347 | fn transpose(matrix: Matrix) -> Matrix {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tuples`
[INFO] [stderr]    --> src/main.rs:367:4
[INFO] [stderr]     |
[INFO] [stderr] 367 | fn tuples() {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `analyze_slice`
[INFO] [stderr]    --> src/main.rs:409:4
[INFO] [stderr]     |
[INFO] [stderr] 409 | fn analyze_slice(slice: &[i32]) {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `arsli`
[INFO] [stderr]    --> src/main.rs:414:4
[INFO] [stderr]     |
[INFO] [stderr] 414 | fn arsli() {
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `NilOne`
[INFO] [stderr]    --> src/main.rs:457:8
[INFO] [stderr]     |
[INFO] [stderr] 457 | struct NilOne;
[INFO] [stderr]     |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Pair`
[INFO] [stderr]    --> src/main.rs:460:8
[INFO] [stderr]     |
[INFO] [stderr] 460 | struct Pair(i32, f32);
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `rect_area`
[INFO] [stderr]    --> src/main.rs:479:4
[INFO] [stderr]     |
[INFO] [stderr] 479 | fn rect_area (rect: &Rectangle) -> f32 {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `square`
[INFO] [stderr]    --> src/main.rs:487:4
[INFO] [stderr]     |
[INFO] [stderr] 487 | fn square(point: &Point, l: f32) -> Rectangle {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `structures`
[INFO] [stderr]    --> src/main.rs:495:4
[INFO] [stderr]     |
[INFO] [stderr] 495 | fn structures() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `WebEvent`
[INFO] [stderr]    --> src/main.rs:557:6
[INFO] [stderr]     |
[INFO] [stderr] 557 | enum WebEvent {
[INFO] [stderr]     |      ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `VeryVerboseEnumOfThingsToDoWithNumbers`
[INFO] [stderr]    --> src/main.rs:568:6
[INFO] [stderr]     |
[INFO] [stderr] 568 | enum VeryVerboseEnumOfThingsToDoWithNumbers {
[INFO] [stderr]     |      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `run`
[INFO] [stderr]    --> src/main.rs:574:5
[INFO] [stderr]     |
[INFO] [stderr] 574 |     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:583:1
[INFO] [stderr]     |
[INFO] [stderr] 583 | type Operations = VeryVerboseEnumOfThingsToDoWithNumbers;
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `inspect`
[INFO] [stderr]    --> src/main.rs:587:4
[INFO] [stderr]     |
[INFO] [stderr] 587 | fn inspect(event: WebEvent) {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `enums`
[INFO] [stderr]    --> src/main.rs:601:4
[INFO] [stderr]     |
[INFO] [stderr] 601 | fn enums() {
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Status`
[INFO] [stderr]    --> src/main.rs:623:6
[INFO] [stderr]     |
[INFO] [stderr] 623 | enum Status {
[INFO] [stderr]     |      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Work`
[INFO] [stderr]    --> src/main.rs:628:6
[INFO] [stderr]     |
[INFO] [stderr] 628 | enum Work {
[INFO] [stderr]     |      ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `enumUse`
[INFO] [stderr]    --> src/main.rs:633:4
[INFO] [stderr]     |
[INFO] [stderr] 633 | fn enumUse() {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Number`
[INFO] [stderr]    --> src/main.rs:661:6
[INFO] [stderr]     |
[INFO] [stderr] 661 | enum Number {
[INFO] [stderr]     |      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `ColorTwo`
[INFO] [stderr]    --> src/main.rs:668:6
[INFO] [stderr]     |
[INFO] [stderr] 668 | enum ColorTwo {
[INFO] [stderr]     |      ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `clike`
[INFO] [stderr]    --> src/main.rs:674:4
[INFO] [stderr]     |
[INFO] [stderr] 674 | fn clike() {
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `ListNew`
[INFO] [stderr]    --> src/main.rs:687:6
[INFO] [stderr]     |
[INFO] [stderr] 687 | enum ListNew {
[INFO] [stderr]     |      ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/main.rs:697:5
[INFO] [stderr]     |
[INFO] [stderr] 697 |     fn new() -> ListNew {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `prepend`
[INFO] [stderr]    --> src/main.rs:703:5
[INFO] [stderr]     |
[INFO] [stderr] 703 |     fn prepend(self, elem: u32) -> ListNew {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `len`
[INFO] [stderr]    --> src/main.rs:709:5
[INFO] [stderr]     |
[INFO] [stderr] 709 |     fn len(&self) -> u32 {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `stringify`
[INFO] [stderr]    --> src/main.rs:724:5
[INFO] [stderr]     |
[INFO] [stderr] 724 |     fn stringify(&self) -> String {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `enum_testcase`
[INFO] [stderr]    --> src/main.rs:738:4
[INFO] [stderr]     |
[INFO] [stderr] 738 | fn enum_testcase() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `LANGUAGE`
[INFO] [stderr]    --> src/main.rs:756:1
[INFO] [stderr]     |
[INFO] [stderr] 756 | static LANGUAGE: &str = "Rust";
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `THRESHOLD`
[INFO] [stderr]    --> src/main.rs:757:1
[INFO] [stderr]     |
[INFO] [stderr] 757 | const THRESHOLD: i32 = 10;
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_big`
[INFO] [stderr]    --> src/main.rs:759:4
[INFO] [stderr]     |
[INFO] [stderr] 759 | fn is_big(n: i32) -> bool {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `constants`
[INFO] [stderr]    --> src/main.rs:764:4
[INFO] [stderr]     |
[INFO] [stderr] 764 | fn constants() {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `varbind`
[INFO] [stderr]    --> src/main.rs:778:4
[INFO] [stderr]     |
[INFO] [stderr] 778 | fn varbind() {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `mutability`
[INFO] [stderr]    --> src/main.rs:799:4
[INFO] [stderr]     |
[INFO] [stderr] 799 | fn mutability() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `scope_shadow`
[INFO] [stderr]    --> src/main.rs:817:4
[INFO] [stderr]     |
[INFO] [stderr] 817 | fn scope_shadow() {
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `declare_first`
[INFO] [stderr]    --> src/main.rs:848:4
[INFO] [stderr]     |
[INFO] [stderr] 848 | fn declare_first() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `casting`
[INFO] [stderr]    --> src/main.rs:877:4
[INFO] [stderr]     |
[INFO] [stderr] 877 | fn casting() {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `literals`
[INFO] [stderr]    --> src/main.rs:924:4
[INFO] [stderr]     |
[INFO] [stderr] 924 | fn literals() {
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `inference`
[INFO] [stderr]    --> src/main.rs:944:4
[INFO] [stderr]     |
[INFO] [stderr] 944 | fn inference() {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `NanoSecond`
[INFO] [stderr]    --> src/main.rs:962:1
[INFO] [stderr]     |
[INFO] [stderr] 962 | type NanoSecond = u64;
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `Inch`
[INFO] [stderr]    --> src/main.rs:963:1
[INFO] [stderr]     |
[INFO] [stderr] 963 | type Inch = u64;
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `aliasing`
[INFO] [stderr]    --> src/main.rs:967:4
[INFO] [stderr]     |
[INFO] [stderr] 967 | fn aliasing() {
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `from_and_into`
[INFO] [stderr]    --> src/main.rs:994:4
[INFO] [stderr]     |
[INFO] [stderr] 994 | fn from_and_into() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tryfrom_tryinto`
[INFO] [stderr]     --> src/main.rs:1024:4
[INFO] [stderr]      |
[INFO] [stderr] 1024 | fn tryfrom_tryinto() {
[INFO] [stderr]      |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `to_from_strings`
[INFO] [stderr]     --> src/main.rs:1052:4
[INFO] [stderr]      |
[INFO] [stderr] 1052 | fn to_from_strings() {
[INFO] [stderr]      |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Color3`
[INFO] [stderr]     --> src/main.rs:1066:6
[INFO] [stderr]      |
[INFO] [stderr] 1066 | enum Color3 {
[INFO] [stderr]      |      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `age`
[INFO] [stderr]     --> src/main.rs:1080:4
[INFO] [stderr]      |
[INFO] [stderr] 1080 | fn age() -> u32 {
[INFO] [stderr]      |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `some_number`
[INFO] [stderr]     --> src/main.rs:1084:4
[INFO] [stderr]      |
[INFO] [stderr] 1084 | fn some_number() -> Option<u32> {
[INFO] [stderr]      |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Foo_two`
[INFO] [stderr]     --> src/main.rs:1088:6
[INFO] [stderr]      |
[INFO] [stderr] 1088 | enum Foo_two {
[INFO] [stderr]      |      ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `flow_control`
[INFO] [stderr]     --> src/main.rs:1094:4
[INFO] [stderr]      |
[INFO] [stderr] 1094 | fn flow_control() {
[INFO] [stderr]      |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `functioned_fizzbuzz`
[INFO] [stderr]     --> src/main.rs:1510:4
[INFO] [stderr]      |
[INFO] [stderr] 1510 | fn functioned_fizzbuzz() {
[INFO] [stderr]      |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_divisible_by`
[INFO] [stderr]     --> src/main.rs:1516:4
[INFO] [stderr]      |
[INFO] [stderr] 1516 | fn is_divisible_by(lhs: u32, rhs: u32) -> bool {
[INFO] [stderr]      |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fizzbuzz`
[INFO] [stderr]     --> src/main.rs:1527:4
[INFO] [stderr]      |
[INFO] [stderr] 1527 | fn fizzbuzz(n: u32) -> () {
[INFO] [stderr]      |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fizzbuzz_to`
[INFO] [stderr]     --> src/main.rs:1541:4
[INFO] [stderr]      |
[INFO] [stderr] 1541 | fn fizzbuzz_to(n: u32) {
[INFO] [stderr]      |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Point_new`
[INFO] [stderr]     --> src/main.rs:1551:8
[INFO] [stderr]      |
[INFO] [stderr] 1551 | struct Point_new {
[INFO] [stderr]      |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `origin`
[INFO] [stderr]     --> src/main.rs:1561:5
[INFO] [stderr]      |
[INFO] [stderr] 1561 |     fn origin() -> Point_new {
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]     --> src/main.rs:1566:5
[INFO] [stderr]      |
[INFO] [stderr] 1566 |     fn new( x: f64, y: f64 ) -> Point_new {
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Rectangle_new`
[INFO] [stderr]     --> src/main.rs:1571:8
[INFO] [stderr]      |
[INFO] [stderr] 1571 | struct Rectangle_new {
[INFO] [stderr]      |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `area`
[INFO] [stderr]     --> src/main.rs:1580:5
[INFO] [stderr]      |
[INFO] [stderr] 1580 |     fn area(&self) -> f64 {
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `perimeter`
[INFO] [stderr]     --> src/main.rs:1590:5
[INFO] [stderr]      |
[INFO] [stderr] 1590 |     fn perimeter(&self) -> f64 {
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `translate`
[INFO] [stderr]     --> src/main.rs:1599:5
[INFO] [stderr]      |
[INFO] [stderr] 1599 |     fn translate(&mut self, x: f64, y: f64) {
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Pair_new`
[INFO] [stderr]     --> src/main.rs:1609:8
[INFO] [stderr]      |
[INFO] [stderr] 1609 | struct Pair_new(Box<i32>, Box<i32>);
[INFO] [stderr]      |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `destroy`
[INFO] [stderr]     --> src/main.rs:1614:5
[INFO] [stderr]      |
[INFO] [stderr] 1614 |     fn destroy(self) {
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `methods`
[INFO] [stderr]     --> src/main.rs:1624:4
[INFO] [stderr]      |
[INFO] [stderr] 1624 | fn methods() {
[INFO] [stderr]      |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `apply`
[INFO] [stderr]     --> src/main.rs:1653:4
[INFO] [stderr]      |
[INFO] [stderr] 1653 | fn apply<F>(f: F) where
[INFO] [stderr]      |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `apply_to_3`
[INFO] [stderr]     --> src/main.rs:1661:4
[INFO] [stderr]      |
[INFO] [stderr] 1661 | fn apply_to_3<F>(f: F) -> i32 where
[INFO] [stderr]      |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `apply_fn`
[INFO] [stderr]     --> src/main.rs:1670:4
[INFO] [stderr]      |
[INFO] [stderr] 1670 | fn apply_fn<F>(f: F) where
[INFO] [stderr]      |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `call_me`
[INFO] [stderr]     --> src/main.rs:1677:4
[INFO] [stderr]      |
[INFO] [stderr] 1677 | fn call_me<F: Fn()>(f: F) {
[INFO] [stderr]      |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `example_function`
[INFO] [stderr]     --> src/main.rs:1682:4
[INFO] [stderr]      |
[INFO] [stderr] 1682 | fn example_function() {
[INFO] [stderr]      |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `create_fn`
[INFO] [stderr]     --> src/main.rs:1686:4
[INFO] [stderr]      |
[INFO] [stderr] 1686 | fn create_fn() -> impl Fn() {
[INFO] [stderr]      |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `create_fnmut`
[INFO] [stderr]     --> src/main.rs:1692:4
[INFO] [stderr]      |
[INFO] [stderr] 1692 | fn create_fnmut() -> impl FnMut() {
[INFO] [stderr]      |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `create_fnonce`
[INFO] [stderr]     --> src/main.rs:1698:4
[INFO] [stderr]      |
[INFO] [stderr] 1698 | fn create_fnonce() -> impl FnOnce() {
[INFO] [stderr]      |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `closures`
[INFO] [stderr]     --> src/main.rs:1704:4
[INFO] [stderr]      |
[INFO] [stderr] 1704 | fn closures() {
[INFO] [stderr]      |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_odd`
[INFO] [stderr]     --> src/main.rs:1929:4
[INFO] [stderr]      |
[INFO] [stderr] 1929 | fn is_odd(n: u32) -> bool {
[INFO] [stderr]      |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `hof`
[INFO] [stderr]     --> src/main.rs:1933:4
[INFO] [stderr]      |
[INFO] [stderr] 1933 | fn hof() {
[INFO] [stderr]      |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stderr]     --> src/main.rs:1890:40
[INFO] [stderr]      |
[INFO] [stderr] 1890 |     println!("2 in array2: {}", array2.into_iter().any(|&x| x == 2));
[INFO] [stderr]      |                                        ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(array_into_iter)]` on by default
[INFO] [stderr]      = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]      = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stderr] 
[INFO] [stderr] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stderr]     --> src/main.rs:1915:47
[INFO] [stderr]      |
[INFO] [stderr] 1915 |     println!("Find 2 in array4: {:?}", array4.into_iter().find(|&&x| x == 2));
[INFO] [stderr]      |                                               ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stderr]      |
[INFO] [stderr]      = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]      = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stderr] 
[INFO] [stderr] warning: function `enumUse` should have a snake case name
[INFO] [stderr]    --> src/main.rs:633:4
[INFO] [stderr]     |
[INFO] [stderr] 633 | 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: 103 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.23s
[INFO] running `"docker" "inspect" "3759ad9bed5a3242079ae3b02826b650e8c54ae6afef9d363e7b9f41fdf2e5a7"`
[INFO] running `"docker" "rm" "-f" "3759ad9bed5a3242079ae3b02826b650e8c54ae6afef9d363e7b9f41fdf2e5a7"`
[INFO] [stdout] 3759ad9bed5a3242079ae3b02826b650e8c54ae6afef9d363e7b9f41fdf2e5a7
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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" "+1.44.0" "test" "--frozen"`
[INFO] [stdout] 72db0d201e60fe90c10cd9c9751f12d38e381eeaab114bd4c6840194ccaffbda
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "72db0d201e60fe90c10cd9c9751f12d38e381eeaab114bd4c6840194ccaffbda"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: type `Foo_two` should have an upper camel case name
[INFO] [stderr]     --> src/main.rs:1088:6
[INFO] [stderr]      |
[INFO] [stderr] 1088 | 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:1150:9
[INFO] [stderr]      |
[INFO] [stderr] 1150 |         'inner: loop {
[INFO] [stderr]      |         ^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_labels)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `Point_new` should have an upper camel case name
[INFO] [stderr]     --> src/main.rs:1551:8
[INFO] [stderr]      |
[INFO] [stderr] 1551 | struct Point_new {
[INFO] [stderr]      |        ^^^^^^^^^ help: convert the identifier to upper camel case: `PointNew`
[INFO] [stderr] 
[INFO] [stderr] warning: type `Rectangle_new` should have an upper camel case name
[INFO] [stderr]     --> src/main.rs:1571:8
[INFO] [stderr]      |
[INFO] [stderr] 1571 | struct Rectangle_new {
[INFO] [stderr]      |        ^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `RectangleNew`
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> src/main.rs:1587:9
[INFO] [stderr]      |
[INFO] [stderr] 1587 |         ((x1 - x2).abs() + (y1 - y2).abs())
[INFO] [stderr]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `Pair_new` should have an upper camel case name
[INFO] [stderr]     --> src/main.rs:1609:8
[INFO] [stderr]      |
[INFO] [stderr] 1609 | struct Pair_new(Box<i32>, Box<i32>);
[INFO] [stderr]      |        ^^^^^^^^ help: convert the identifier to upper camel case: `PairNew`
[INFO] [stderr] 
[INFO] [stderr] warning: the item `mem` is imported redundantly
[INFO] [stderr]     --> src/main.rs:1734:9
[INFO] [stderr]      |
[INFO] [stderr] 406  | use std::mem;
[INFO] [stderr]      |     -------- the item `mem` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 1734 |     use std::mem;
[INFO] [stderr]      |         ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `logical`
[INFO] [stderr]    --> src/main.rs:287:9
[INFO] [stderr]     |
[INFO] [stderr] 287 |     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:289:9
[INFO] [stderr]     |
[INFO] [stderr] 289 |     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:290:9
[INFO] [stderr]     |
[INFO] [stderr] 290 |     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:293:9
[INFO] [stderr]     |
[INFO] [stderr] 293 |     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:294:9
[INFO] [stderr]     |
[INFO] [stderr] 294 |     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:297:9
[INFO] [stderr]     |
[INFO] [stderr] 297 |     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:298:5
[INFO] [stderr]     |
[INFO] [stderr] 298 |     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:301:9
[INFO] [stderr]     |
[INFO] [stderr] 301 |     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:302:5
[INFO] [stderr]     |
[INFO] [stderr] 302 |     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:308:9
[INFO] [stderr]     |
[INFO] [stderr] 308 |     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:617:9
[INFO] [stderr]     |
[INFO] [stderr] 617 |     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:1475:25
[INFO] [stderr]      |
[INFO] [stderr] 1475 |     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:48:4
[INFO] [stderr]    |
[INFO] [stderr] 48 | 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:97:4
[INFO] [stderr]    |
[INFO] [stderr] 97 | fn debug(){
[INFO] [stderr]    |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `display`
[INFO] [stderr]    --> src/main.rs:199:4
[INFO] [stderr]     |
[INFO] [stderr] 199 | fn display(){
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `formatting`
[INFO] [stderr]    --> src/main.rs:266:4
[INFO] [stderr]     |
[INFO] [stderr] 266 | fn formatting() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `primitives`
[INFO] [stderr]    --> src/main.rs:285:4
[INFO] [stderr]     |
[INFO] [stderr] 285 | fn primitives() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `lit_op`
[INFO] [stderr]    --> src/main.rs:313:4
[INFO] [stderr]     |
[INFO] [stderr] 313 | fn lit_op() {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `reverse`
[INFO] [stderr]    --> src/main.rs:339:4
[INFO] [stderr]     |
[INFO] [stderr] 339 | fn reverse(pair: (i32, bool)) -> (bool, i32) {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `transpose`
[INFO] [stderr]    --> src/main.rs:347:4
[INFO] [stderr]     |
[INFO] [stderr] 347 | fn transpose(matrix: Matrix) -> Matrix {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tuples`
[INFO] [stderr]    --> src/main.rs:367:4
[INFO] [stderr]     |
[INFO] [stderr] 367 | fn tuples() {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `analyze_slice`
[INFO] [stderr]    --> src/main.rs:409:4
[INFO] [stderr]     |
[INFO] [stderr] 409 | fn analyze_slice(slice: &[i32]) {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `arsli`
[INFO] [stderr]    --> src/main.rs:414:4
[INFO] [stderr]     |
[INFO] [stderr] 414 | fn arsli() {
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `NilOne`
[INFO] [stderr]    --> src/main.rs:457:8
[INFO] [stderr]     |
[INFO] [stderr] 457 | struct NilOne;
[INFO] [stderr]     |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Pair`
[INFO] [stderr]    --> src/main.rs:460:8
[INFO] [stderr]     |
[INFO] [stderr] 460 | struct Pair(i32, f32);
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `rect_area`
[INFO] [stderr]    --> src/main.rs:479:4
[INFO] [stderr]     |
[INFO] [stderr] 479 | fn rect_area (rect: &Rectangle) -> f32 {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `square`
[INFO] [stderr]    --> src/main.rs:487:4
[INFO] [stderr]     |
[INFO] [stderr] 487 | fn square(point: &Point, l: f32) -> Rectangle {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `structures`
[INFO] [stderr]    --> src/main.rs:495:4
[INFO] [stderr]     |
[INFO] [stderr] 495 | fn structures() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `WebEvent`
[INFO] [stderr]    --> src/main.rs:557:6
[INFO] [stderr]     |
[INFO] [stderr] 557 | enum WebEvent {
[INFO] [stderr]     |      ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `VeryVerboseEnumOfThingsToDoWithNumbers`
[INFO] [stderr]    --> src/main.rs:568:6
[INFO] [stderr]     |
[INFO] [stderr] 568 | enum VeryVerboseEnumOfThingsToDoWithNumbers {
[INFO] [stderr]     |      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `run`
[INFO] [stderr]    --> src/main.rs:574:5
[INFO] [stderr]     |
[INFO] [stderr] 574 |     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:583:1
[INFO] [stderr]     |
[INFO] [stderr] 583 | type Operations = VeryVerboseEnumOfThingsToDoWithNumbers;
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `inspect`
[INFO] [stderr]    --> src/main.rs:587:4
[INFO] [stderr]     |
[INFO] [stderr] 587 | fn inspect(event: WebEvent) {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `enums`
[INFO] [stderr]    --> src/main.rs:601:4
[INFO] [stderr]     |
[INFO] [stderr] 601 | fn enums() {
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Status`
[INFO] [stderr]    --> src/main.rs:623:6
[INFO] [stderr]     |
[INFO] [stderr] 623 | enum Status {
[INFO] [stderr]     |      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Work`
[INFO] [stderr]    --> src/main.rs:628:6
[INFO] [stderr]     |
[INFO] [stderr] 628 | enum Work {
[INFO] [stderr]     |      ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `enumUse`
[INFO] [stderr]    --> src/main.rs:633:4
[INFO] [stderr]     |
[INFO] [stderr] 633 | fn enumUse() {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Number`
[INFO] [stderr]    --> src/main.rs:661:6
[INFO] [stderr]     |
[INFO] [stderr] 661 | enum Number {
[INFO] [stderr]     |      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `ColorTwo`
[INFO] [stderr]    --> src/main.rs:668:6
[INFO] [stderr]     |
[INFO] [stderr] 668 | enum ColorTwo {
[INFO] [stderr]     |      ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `clike`
[INFO] [stderr]    --> src/main.rs:674:4
[INFO] [stderr]     |
[INFO] [stderr] 674 | fn clike() {
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `ListNew`
[INFO] [stderr]    --> src/main.rs:687:6
[INFO] [stderr]     |
[INFO] [stderr] 687 | enum ListNew {
[INFO] [stderr]     |      ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/main.rs:697:5
[INFO] [stderr]     |
[INFO] [stderr] 697 |     fn new() -> ListNew {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `prepend`
[INFO] [stderr]    --> src/main.rs:703:5
[INFO] [stderr]     |
[INFO] [stderr] 703 |     fn prepend(self, elem: u32) -> ListNew {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `len`
[INFO] [stderr]    --> src/main.rs:709:5
[INFO] [stderr]     |
[INFO] [stderr] 709 |     fn len(&self) -> u32 {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `stringify`
[INFO] [stderr]    --> src/main.rs:724:5
[INFO] [stderr]     |
[INFO] [stderr] 724 |     fn stringify(&self) -> String {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `enum_testcase`
[INFO] [stderr]    --> src/main.rs:738:4
[INFO] [stderr]     |
[INFO] [stderr] 738 | fn enum_testcase() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `LANGUAGE`
[INFO] [stderr]    --> src/main.rs:756:1
[INFO] [stderr]     |
[INFO] [stderr] 756 | static LANGUAGE: &str = "Rust";
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `THRESHOLD`
[INFO] [stderr]    --> src/main.rs:757:1
[INFO] [stderr]     |
[INFO] [stderr] 757 | const THRESHOLD: i32 = 10;
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_big`
[INFO] [stderr]    --> src/main.rs:759:4
[INFO] [stderr]     |
[INFO] [stderr] 759 | fn is_big(n: i32) -> bool {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `constants`
[INFO] [stderr]    --> src/main.rs:764:4
[INFO] [stderr]     |
[INFO] [stderr] 764 | fn constants() {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `varbind`
[INFO] [stderr]    --> src/main.rs:778:4
[INFO] [stderr]     |
[INFO] [stderr] 778 | fn varbind() {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `mutability`
[INFO] [stderr]    --> src/main.rs:799:4
[INFO] [stderr]     |
[INFO] [stderr] 799 | fn mutability() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `scope_shadow`
[INFO] [stderr]    --> src/main.rs:817:4
[INFO] [stderr]     |
[INFO] [stderr] 817 | fn scope_shadow() {
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `declare_first`
[INFO] [stderr]    --> src/main.rs:848:4
[INFO] [stderr]     |
[INFO] [stderr] 848 | fn declare_first() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `casting`
[INFO] [stderr]    --> src/main.rs:877:4
[INFO] [stderr]     |
[INFO] [stderr] 877 | fn casting() {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `literals`
[INFO] [stderr]    --> src/main.rs:924:4
[INFO] [stderr]     |
[INFO] [stderr] 924 | fn literals() {
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `inference`
[INFO] [stderr]    --> src/main.rs:944:4
[INFO] [stderr]     |
[INFO] [stderr] 944 | fn inference() {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `NanoSecond`
[INFO] [stderr]    --> src/main.rs:962:1
[INFO] [stderr]     |
[INFO] [stderr] 962 | type NanoSecond = u64;
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `Inch`
[INFO] [stderr]    --> src/main.rs:963:1
[INFO] [stderr]     |
[INFO] [stderr] 963 | type Inch = u64;
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `aliasing`
[INFO] [stderr]    --> src/main.rs:967:4
[INFO] [stderr]     |
[INFO] [stderr] 967 | fn aliasing() {
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `from_and_into`
[INFO] [stderr]    --> src/main.rs:994:4
[INFO] [stderr]     |
[INFO] [stderr] 994 | fn from_and_into() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tryfrom_tryinto`
[INFO] [stderr]     --> src/main.rs:1024:4
[INFO] [stderr]      |
[INFO] [stderr] 1024 | fn tryfrom_tryinto() {
[INFO] [stderr]      |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `to_from_strings`
[INFO] [stderr]     --> src/main.rs:1052:4
[INFO] [stderr]      |
[INFO] [stderr] 1052 | fn to_from_strings() {
[INFO] [stderr]      |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Color3`
[INFO] [stderr]     --> src/main.rs:1066:6
[INFO] [stderr]      |
[INFO] [stderr] 1066 | enum Color3 {
[INFO] [stderr]      |      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `age`
[INFO] [stderr]     --> src/main.rs:1080:4
[INFO] [stderr]      |
[INFO] [stderr] 1080 | fn age() -> u32 {
[INFO] [stderr]      |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `some_number`
[INFO] [stderr]     --> src/main.rs:1084:4
[INFO] [stderr]      |
[INFO] [stderr] 1084 | fn some_number() -> Option<u32> {
[INFO] [stderr]      |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Foo_two`
[INFO] [stderr]     --> src/main.rs:1088:6
[INFO] [stderr]      |
[INFO] [stderr] 1088 | enum Foo_two {
[INFO] [stderr]      |      ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `flow_control`
[INFO] [stderr]     --> src/main.rs:1094:4
[INFO] [stderr]      |
[INFO] [stderr] 1094 | fn flow_control() {
[INFO] [stderr]      |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `functioned_fizzbuzz`
[INFO] [stderr]     --> src/main.rs:1510:4
[INFO] [stderr]      |
[INFO] [stderr] 1510 | fn functioned_fizzbuzz() {
[INFO] [stderr]      |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_divisible_by`
[INFO] [stderr]     --> src/main.rs:1516:4
[INFO] [stderr]      |
[INFO] [stderr] 1516 | fn is_divisible_by(lhs: u32, rhs: u32) -> bool {
[INFO] [stderr]      |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fizzbuzz`
[INFO] [stderr]     --> src/main.rs:1527:4
[INFO] [stderr]      |
[INFO] [stderr] 1527 | fn fizzbuzz(n: u32) -> () {
[INFO] [stderr]      |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fizzbuzz_to`
[INFO] [stderr]     --> src/main.rs:1541:4
[INFO] [stderr]      |
[INFO] [stderr] 1541 | fn fizzbuzz_to(n: u32) {
[INFO] [stderr]      |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Point_new`
[INFO] [stderr]     --> src/main.rs:1551:8
[INFO] [stderr]      |
[INFO] [stderr] 1551 | struct Point_new {
[INFO] [stderr]      |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `origin`
[INFO] [stderr]     --> src/main.rs:1561:5
[INFO] [stderr]      |
[INFO] [stderr] 1561 |     fn origin() -> Point_new {
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]     --> src/main.rs:1566:5
[INFO] [stderr]      |
[INFO] [stderr] 1566 |     fn new( x: f64, y: f64 ) -> Point_new {
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Rectangle_new`
[INFO] [stderr]     --> src/main.rs:1571:8
[INFO] [stderr]      |
[INFO] [stderr] 1571 | struct Rectangle_new {
[INFO] [stderr]      |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `area`
[INFO] [stderr]     --> src/main.rs:1580:5
[INFO] [stderr]      |
[INFO] [stderr] 1580 |     fn area(&self) -> f64 {
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `perimeter`
[INFO] [stderr]     --> src/main.rs:1590:5
[INFO] [stderr]      |
[INFO] [stderr] 1590 |     fn perimeter(&self) -> f64 {
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `translate`
[INFO] [stderr]     --> src/main.rs:1599:5
[INFO] [stderr]      |
[INFO] [stderr] 1599 |     fn translate(&mut self, x: f64, y: f64) {
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Pair_new`
[INFO] [stderr]     --> src/main.rs:1609:8
[INFO] [stderr]      |
[INFO] [stderr] 1609 | struct Pair_new(Box<i32>, Box<i32>);
[INFO] [stderr]      |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `destroy`
[INFO] [stderr]     --> src/main.rs:1614:5
[INFO] [stderr]      |
[INFO] [stderr] 1614 |     fn destroy(self) {
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `methods`
[INFO] [stderr]     --> src/main.rs:1624:4
[INFO] [stderr]      |
[INFO] [stderr] 1624 | fn methods() {
[INFO] [stderr]      |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `apply`
[INFO] [stderr]     --> src/main.rs:1653:4
[INFO] [stderr]      |
[INFO] [stderr] 1653 | fn apply<F>(f: F) where
[INFO] [stderr]      |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `apply_to_3`
[INFO] [stderr]     --> src/main.rs:1661:4
[INFO] [stderr]      |
[INFO] [stderr] 1661 | fn apply_to_3<F>(f: F) -> i32 where
[INFO] [stderr]      |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `apply_fn`
[INFO] [stderr]     --> src/main.rs:1670:4
[INFO] [stderr]      |
[INFO] [stderr] 1670 | fn apply_fn<F>(f: F) where
[INFO] [stderr]      |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `call_me`
[INFO] [stderr]     --> src/main.rs:1677:4
[INFO] [stderr]      |
[INFO] [stderr] 1677 | fn call_me<F: Fn()>(f: F) {
[INFO] [stderr]      |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `example_function`
[INFO] [stderr]     --> src/main.rs:1682:4
[INFO] [stderr]      |
[INFO] [stderr] 1682 | fn example_function() {
[INFO] [stderr]      |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `create_fn`
[INFO] [stderr]     --> src/main.rs:1686:4
[INFO] [stderr]      |
[INFO] [stderr] 1686 | fn create_fn() -> impl Fn() {
[INFO] [stderr]      |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `create_fnmut`
[INFO] [stderr]     --> src/main.rs:1692:4
[INFO] [stderr]      |
[INFO] [stderr] 1692 | fn create_fnmut() -> impl FnMut() {
[INFO] [stderr]      |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `create_fnonce`
[INFO] [stderr]     --> src/main.rs:1698:4
[INFO] [stderr]      |
[INFO] [stderr] 1698 | fn create_fnonce() -> impl FnOnce() {
[INFO] [stderr]      |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `closures`
[INFO] [stderr]     --> src/main.rs:1704:4
[INFO] [stderr]      |
[INFO] [stderr] 1704 | fn closures() {
[INFO] [stderr]      |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_odd`
[INFO] [stderr]     --> src/main.rs:1929:4
[INFO] [stderr]      |
[INFO] [stderr] 1929 | fn is_odd(n: u32) -> bool {
[INFO] [stderr]      |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `hof`
[INFO] [stderr]     --> src/main.rs:1933:4
[INFO] [stderr]      |
[INFO] [stderr] 1933 | fn hof() {
[INFO] [stderr]      |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stderr]     --> src/main.rs:1890:40
[INFO] [stderr]      |
[INFO] [stderr] 1890 |     println!("2 in array2: {}", array2.into_iter().any(|&x| x == 2));
[INFO] [stderr]      |                                        ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(array_into_iter)]` on by default
[INFO] [stderr]      = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]      = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stderr] 
[INFO] [stderr] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stderr]     --> src/main.rs:1915:47
[INFO] [stderr]      |
[INFO] [stderr] 1915 |     println!("Find 2 in array4: {:?}", array4.into_iter().find(|&&x| x == 2));
[INFO] [stderr]      |                                               ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stderr]      |
[INFO] [stderr]      = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]      = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stderr] 
[INFO] [stderr] warning: function `enumUse` should have a snake case name
[INFO] [stderr]    --> src/main.rs:633:4
[INFO] [stderr]     |
[INFO] [stderr] 633 | 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: 103 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rust_by_example-4b6ea11100328d16
[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
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "72db0d201e60fe90c10cd9c9751f12d38e381eeaab114bd4c6840194ccaffbda"`
[INFO] running `"docker" "rm" "-f" "72db0d201e60fe90c10cd9c9751f12d38e381eeaab114bd4c6840194ccaffbda"`
[INFO] [stdout] 72db0d201e60fe90c10cd9c9751f12d38e381eeaab114bd4c6840194ccaffbda