[INFO] cloning repository https://github.com/CyberGA/HelloWorld
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/CyberGA/HelloWorld" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCyberGA%2FHelloWorld", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCyberGA%2FHelloWorld'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6a2534a460f6115c511bb8ee637822a7d0e68f41
[INFO] testing CyberGA/HelloWorld against master#1ef7943ee607160a564655b6596f83670ef95df5 for pr-146098-6
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCyberGA%2FHelloWorld" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/CyberGA/HelloWorld
[INFO] finished tweaking git repo https://github.com/CyberGA/HelloWorld
[INFO] tweaked toml for git repo https://github.com/CyberGA/HelloWorld written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/CyberGA/HelloWorld on toolchain 1ef7943ee607160a564655b6596f83670ef95df5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1ef7943ee607160a564655b6596f83670ef95df5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/CyberGA/HelloWorld already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1ef7943ee607160a564655b6596f83670ef95df5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1ef7943ee607160a564655b6596f83670ef95df5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 200494e39507bad8faba11724c13d05ea69ddd068f2a55ff6ebbac7132352a3c
[INFO] running `Command { std: "docker" "start" "-a" "200494e39507bad8faba11724c13d05ea69ddd068f2a55ff6ebbac7132352a3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "200494e39507bad8faba11724c13d05ea69ddd068f2a55ff6ebbac7132352a3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "200494e39507bad8faba11724c13d05ea69ddd068f2a55ff6ebbac7132352a3c", kill_on_drop: false }`
[INFO] [stdout] 200494e39507bad8faba11724c13d05ea69ddd068f2a55ff6ebbac7132352a3c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1ef7943ee607160a564655b6596f83670ef95df5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a4d7d679dcecdb8e5b259cfaef675590895804bb790724742d3dc6333d883245
[INFO] running `Command { std: "docker" "start" "-a" "a4d7d679dcecdb8e5b259cfaef675590895804bb790724742d3dc6333d883245", kill_on_drop: false }`
[INFO] [stderr]    Compiling HelloWorld v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `File`, `HashMap`, `OpenOptions`, `Read`, and `any`
[INFO] [stdout]  --> src/printer.rs:1:25
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::{HashMap, HashSet}, any, fs::{File, OpenOptions}, fmt::Display, io::{Write, Read}, i32};
[INFO] [stdout]   |                         ^^^^^^^            ^^^       ^^^^  ^^^^^^^^^^^                             ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `msg_state`
[INFO] [stdout]   --> src/printer.rs:95:7
[INFO] [stdout]    |
[INFO] [stdout] 95 |   let msg_state: Message = Message::Move { x: 2, y: 4 };
[INFO] [stdout]    |       ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_msg_state`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/printer.rs:115:7
[INFO] [stdout]     |
[INFO] [stdout] 115 |   let mut name = "Testing.......";
[INFO] [stdout]     |       ----^^^^
[INFO] [stdout]     |       |
[INFO] [stdout]     |       help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `arr` is never read
[INFO] [stdout]    --> src/printer.rs:143:5
[INFO] [stdout]     |
[INFO] [stdout] 143 |     arr[3] = 80;
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `student_age`
[INFO] [stdout]    --> src/printer.rs:268:7
[INFO] [stdout]     |
[INFO] [stdout] 268 |   let student_age: Ages = Ages(12, 16, 18);
[INFO] [stdout]     |       ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_student_age`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/printer.rs:473:7
[INFO] [stdout]     |
[INFO] [stdout] 473 |   let mut a = [10, 20, 30];
[INFO] [stdout]     |       ----^
[INFO] [stdout]     |       |
[INFO] [stdout]     |       help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/printer.rs:475:7
[INFO] [stdout]     |
[INFO] [stdout] 475 |   let mut iter = a.iter();
[INFO] [stdout]     |       ----^^^^
[INFO] [stdout]     |       |
[INFO] [stdout]     |       help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `LENGTH` is never used
[INFO] [stdout]  --> src/printer.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | const LENGTH: u32 = 20;
[INFO] [stdout]   |       ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `printer_fn` is never used
[INFO] [stdout]  --> src/printer.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn printer_fn() {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `machine_type` is never used
[INFO] [stdout]   --> src/printer.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn machine_type() {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `looping` is never used
[INFO] [stdout]   --> src/printer.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub fn looping() {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `loop_while` is never used
[INFO] [stdout]   --> src/printer.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub fn loop_while() {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `loop_for` is never used
[INFO] [stdout]   --> src/printer.rs:64:8
[INFO] [stdout]    |
[INFO] [stdout] 64 | pub fn loop_for() {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Days` is never used
[INFO] [stdout]   --> src/printer.rs:71:6
[INFO] [stdout]    |
[INFO] [stdout] 71 | enum Days {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `usin_enum` is never used
[INFO] [stdout]   --> src/printer.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub fn usin_enum() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `using_constants` is never used
[INFO] [stdout]   --> src/printer.rs:98:8
[INFO] [stdout]    |
[INFO] [stdout] 98 | pub fn using_constants() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `using_tuple` is never used
[INFO] [stdout]    --> src/printer.rs:104:8
[INFO] [stdout]     |
[INFO] [stdout] 104 | pub fn using_tuple() { // can store value of different data type
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_str` is never used
[INFO] [stdout]    --> src/printer.rs:114:8
[INFO] [stdout]     |
[INFO] [stdout] 114 | pub fn print_str() {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `using_array` is never used
[INFO] [stdout]    --> src/printer.rs:126:8
[INFO] [stdout]     |
[INFO] [stdout] 126 | pub fn using_array() { // can only store value of the same data time
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_arr` is never used
[INFO] [stdout]    --> src/printer.rs:158:8
[INFO] [stdout]     |
[INFO] [stdout] 158 | pub fn print_arr(arr: &mut[i32;4]) {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `using_borrowing` is never used
[INFO] [stdout]    --> src/printer.rs:166:9
[INFO] [stdout]     |
[INFO] [stdout] 166 |  pub fn using_borrowing() {
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `using_slice` is never used
[INFO] [stdout]    --> src/printer.rs:212:8
[INFO] [stdout]     |
[INFO] [stdout] 212 | pub fn using_slice() {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `using_struct` is never used
[INFO] [stdout]    --> src/printer.rs:231:8
[INFO] [stdout]     |
[INFO] [stdout] 231 | pub fn using_struct() {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `method_in_struct` is never used
[INFO] [stdout]    --> src/printer.rs:274:8
[INFO] [stdout]     |
[INFO] [stdout] 274 | pub fn method_in_struct() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `area` is never used
[INFO] [stdout]    --> src/printer.rs:279:10
[INFO] [stdout]     |
[INFO] [stdout] 278 |   impl  Rectangle {
[INFO] [stdout]     |   --------------- method in this implementation
[INFO] [stdout] 279 |       fn area(&self) {
[INFO] [stdout]     |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `static_struct_method` is never used
[INFO] [stdout]    --> src/printer.rs:287:8
[INFO] [stdout]     |
[INFO] [stdout] 287 | pub fn static_struct_method() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `areaInstance` and `area` are never used
[INFO] [stdout]    --> src/printer.rs:292:10
[INFO] [stdout]     |
[INFO] [stdout] 291 |   impl  Rectangle {
[INFO] [stdout]     |   --------------- associated items in this implementation
[INFO] [stdout] 292 |       fn areaInstance(w: u32, h: u32) -> Rectangle {
[INFO] [stdout]     |          ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 295 |       fn area(&self) {
[INFO] [stdout]     |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `option_enum` is never used
[INFO] [stdout]    --> src/printer.rs:303:8
[INFO] [stdout]     |
[INFO] [stdout] 303 | pub fn option_enum() {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `using_vector` is never used
[INFO] [stdout]    --> src/printer.rs:329:8
[INFO] [stdout]     |
[INFO] [stdout] 329 | pub fn using_vector() {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `using_hashmap` is never used
[INFO] [stdout]    --> src/printer.rs:345:8
[INFO] [stdout]     |
[INFO] [stdout] 345 | pub fn using_hashmap() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `working_on_errors` is never used
[INFO] [stdout]    --> src/printer.rs:377:8
[INFO] [stdout]     |
[INFO] [stdout] 377 | pub fn working_on_errors() -> Result<bool, String> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `using_generics` is never used
[INFO] [stdout]    --> src/printer.rs:385:8
[INFO] [stdout]     |
[INFO] [stdout] 385 | pub fn using_generics() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `using_traits` is never used
[INFO] [stdout]    --> src/printer.rs:400:8
[INFO] [stdout]     |
[INFO] [stdout] 400 | pub fn using_traits() {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_write` is never used
[INFO] [stdout]    --> src/printer.rs:429:8
[INFO] [stdout]     |
[INFO] [stdout] 429 | pub fn read_write() {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `working_with_file` is never used
[INFO] [stdout]    --> src/printer.rs:450:8
[INFO] [stdout]     |
[INFO] [stdout] 450 | pub fn working_with_file() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `working_with_iterators` is never used
[INFO] [stdout]    --> src/printer.rs:472:8
[INFO] [stdout]     |
[INFO] [stdout] 472 | pub fn working_with_iterators() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `using_closure` is never used
[INFO] [stdout]    --> src/printer.rs:491:8
[INFO] [stdout]     |
[INFO] [stdout] 491 | pub fn using_closure() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `using_smart_pointers` is never used
[INFO] [stdout]    --> src/printer.rs:499:8
[INFO] [stdout]     |
[INFO] [stdout] 499 | pub fn using_smart_pointers() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `areaInstance` should have a snake case name
[INFO] [stdout]    --> src/printer.rs:292:10
[INFO] [stdout]     |
[INFO] [stdout] 292 |       fn areaInstance(w: u32, h: u32) -> Rectangle {
[INFO] [stdout]     |          ^^^^^^^^^^^^ help: convert the identifier to snake case: `area_instance`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.29s
[INFO] running `Command { std: "docker" "inspect" "a4d7d679dcecdb8e5b259cfaef675590895804bb790724742d3dc6333d883245", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4d7d679dcecdb8e5b259cfaef675590895804bb790724742d3dc6333d883245", kill_on_drop: false }`
[INFO] [stdout] a4d7d679dcecdb8e5b259cfaef675590895804bb790724742d3dc6333d883245
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1ef7943ee607160a564655b6596f83670ef95df5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6f1b1605f5c91aaf67a6afb3efe9d1fe4590e42dd01952cb8a4b3d187fd10149
[INFO] running `Command { std: "docker" "start" "-a" "6f1b1605f5c91aaf67a6afb3efe9d1fe4590e42dd01952cb8a4b3d187fd10149", kill_on_drop: false }`
[INFO] [stderr]    Compiling HelloWorld v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `File`, `HashMap`, `OpenOptions`, `Read`, and `any`
[INFO] [stdout]  --> src/printer.rs:1:25
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::{HashMap, HashSet}, any, fs::{File, OpenOptions}, fmt::Display, io::{Write, Read}, i32};
[INFO] [stdout]   |                         ^^^^^^^            ^^^       ^^^^  ^^^^^^^^^^^                             ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `msg_state`
[INFO] [stdout]   --> src/printer.rs:95:7
[INFO] [stdout]    |
[INFO] [stdout] 95 |   let msg_state: Message = Message::Move { x: 2, y: 4 };
[INFO] [stdout]    |       ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_msg_state`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/printer.rs:115:7
[INFO] [stdout]     |
[INFO] [stdout] 115 |   let mut name = "Testing.......";
[INFO] [stdout]     |       ----^^^^
[INFO] [stdout]     |       |
[INFO] [stdout]     |       help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `arr` is never read
[INFO] [stdout]    --> src/printer.rs:143:5
[INFO] [stdout]     |
[INFO] [stdout] 143 |     arr[3] = 80;
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `student_age`
[INFO] [stdout]    --> src/printer.rs:268:7
[INFO] [stdout]     |
[INFO] [stdout] 268 |   let student_age: Ages = Ages(12, 16, 18);
[INFO] [stdout]     |       ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_student_age`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/printer.rs:473:7
[INFO] [stdout]     |
[INFO] [stdout] 473 |   let mut a = [10, 20, 30];
[INFO] [stdout]     |       ----^
[INFO] [stdout]     |       |
[INFO] [stdout]     |       help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/printer.rs:475:7
[INFO] [stdout]     |
[INFO] [stdout] 475 |   let mut iter = a.iter();
[INFO] [stdout]     |       ----^^^^
[INFO] [stdout]     |       |
[INFO] [stdout]     |       help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `LENGTH` is never used
[INFO] [stdout]  --> src/printer.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | const LENGTH: u32 = 20;
[INFO] [stdout]   |       ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `printer_fn` is never used
[INFO] [stdout]  --> src/printer.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn printer_fn() {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `machine_type` is never used
[INFO] [stdout]   --> src/printer.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn machine_type() {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `looping` is never used
[INFO] [stdout]   --> src/printer.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub fn looping() {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `loop_while` is never used
[INFO] [stdout]   --> src/printer.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub fn loop_while() {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `loop_for` is never used
[INFO] [stdout]   --> src/printer.rs:64:8
[INFO] [stdout]    |
[INFO] [stdout] 64 | pub fn loop_for() {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Days` is never used
[INFO] [stdout]   --> src/printer.rs:71:6
[INFO] [stdout]    |
[INFO] [stdout] 71 | enum Days {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `usin_enum` is never used
[INFO] [stdout]   --> src/printer.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub fn usin_enum() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `using_constants` is never used
[INFO] [stdout]   --> src/printer.rs:98:8
[INFO] [stdout]    |
[INFO] [stdout] 98 | pub fn using_constants() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `using_tuple` is never used
[INFO] [stdout]    --> src/printer.rs:104:8
[INFO] [stdout]     |
[INFO] [stdout] 104 | pub fn using_tuple() { // can store value of different data type
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_str` is never used
[INFO] [stdout]    --> src/printer.rs:114:8
[INFO] [stdout]     |
[INFO] [stdout] 114 | pub fn print_str() {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `using_array` is never used
[INFO] [stdout]    --> src/printer.rs:126:8
[INFO] [stdout]     |
[INFO] [stdout] 126 | pub fn using_array() { // can only store value of the same data time
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_arr` is never used
[INFO] [stdout]    --> src/printer.rs:158:8
[INFO] [stdout]     |
[INFO] [stdout] 158 | pub fn print_arr(arr: &mut[i32;4]) {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `using_borrowing` is never used
[INFO] [stdout]    --> src/printer.rs:166:9
[INFO] [stdout]     |
[INFO] [stdout] 166 |  pub fn using_borrowing() {
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `using_slice` is never used
[INFO] [stdout]    --> src/printer.rs:212:8
[INFO] [stdout]     |
[INFO] [stdout] 212 | pub fn using_slice() {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `using_struct` is never used
[INFO] [stdout]    --> src/printer.rs:231:8
[INFO] [stdout]     |
[INFO] [stdout] 231 | pub fn using_struct() {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `method_in_struct` is never used
[INFO] [stdout]    --> src/printer.rs:274:8
[INFO] [stdout]     |
[INFO] [stdout] 274 | pub fn method_in_struct() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `area` is never used
[INFO] [stdout]    --> src/printer.rs:279:10
[INFO] [stdout]     |
[INFO] [stdout] 278 |   impl  Rectangle {
[INFO] [stdout]     |   --------------- method in this implementation
[INFO] [stdout] 279 |       fn area(&self) {
[INFO] [stdout]     |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `static_struct_method` is never used
[INFO] [stdout]    --> src/printer.rs:287:8
[INFO] [stdout]     |
[INFO] [stdout] 287 | pub fn static_struct_method() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `areaInstance` and `area` are never used
[INFO] [stdout]    --> src/printer.rs:292:10
[INFO] [stdout]     |
[INFO] [stdout] 291 |   impl  Rectangle {
[INFO] [stdout]     |   --------------- associated items in this implementation
[INFO] [stdout] 292 |       fn areaInstance(w: u32, h: u32) -> Rectangle {
[INFO] [stdout]     |          ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 295 |       fn area(&self) {
[INFO] [stdout]     |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `option_enum` is never used
[INFO] [stdout]    --> src/printer.rs:303:8
[INFO] [stdout]     |
[INFO] [stdout] 303 | pub fn option_enum() {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `using_vector` is never used
[INFO] [stdout]    --> src/printer.rs:329:8
[INFO] [stdout]     |
[INFO] [stdout] 329 | pub fn using_vector() {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `using_hashmap` is never used
[INFO] [stdout]    --> src/printer.rs:345:8
[INFO] [stdout]     |
[INFO] [stdout] 345 | pub fn using_hashmap() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `working_on_errors` is never used
[INFO] [stdout]    --> src/printer.rs:377:8
[INFO] [stdout]     |
[INFO] [stdout] 377 | pub fn working_on_errors() -> Result<bool, String> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `using_generics` is never used
[INFO] [stdout]    --> src/printer.rs:385:8
[INFO] [stdout]     |
[INFO] [stdout] 385 | pub fn using_generics() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `using_traits` is never used
[INFO] [stdout]    --> src/printer.rs:400:8
[INFO] [stdout]     |
[INFO] [stdout] 400 | pub fn using_traits() {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_write` is never used
[INFO] [stdout]    --> src/printer.rs:429:8
[INFO] [stdout]     |
[INFO] [stdout] 429 | pub fn read_write() {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `working_with_file` is never used
[INFO] [stdout]    --> src/printer.rs:450:8
[INFO] [stdout]     |
[INFO] [stdout] 450 | pub fn working_with_file() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `working_with_iterators` is never used
[INFO] [stdout]    --> src/printer.rs:472:8
[INFO] [stdout]     |
[INFO] [stdout] 472 | pub fn working_with_iterators() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `using_closure` is never used
[INFO] [stdout]    --> src/printer.rs:491:8
[INFO] [stdout]     |
[INFO] [stdout] 491 | pub fn using_closure() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `using_smart_pointers` is never used
[INFO] [stdout]    --> src/printer.rs:499:8
[INFO] [stdout]     |
[INFO] [stdout] 499 | pub fn using_smart_pointers() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `areaInstance` should have a snake case name
[INFO] [stdout]    --> src/printer.rs:292:10
[INFO] [stdout]     |
[INFO] [stdout] 292 |       fn areaInstance(w: u32, h: u32) -> Rectangle {
[INFO] [stdout]     |          ^^^^^^^^^^^^ help: convert the identifier to snake case: `area_instance`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.52s
[INFO] running `Command { std: "docker" "inspect" "6f1b1605f5c91aaf67a6afb3efe9d1fe4590e42dd01952cb8a4b3d187fd10149", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f1b1605f5c91aaf67a6afb3efe9d1fe4590e42dd01952cb8a4b3d187fd10149", kill_on_drop: false }`
[INFO] [stdout] 6f1b1605f5c91aaf67a6afb3efe9d1fe4590e42dd01952cb8a4b3d187fd10149
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1ef7943ee607160a564655b6596f83670ef95df5" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 22c6b060ddbe6e92fc849a7911a425af4300db6cec7b709bfa957b97505e6c6d
[INFO] running `Command { std: "docker" "start" "-a" "22c6b060ddbe6e92fc849a7911a425af4300db6cec7b709bfa957b97505e6c6d", kill_on_drop: false }`
[INFO] [stderr] warning: unused imports: `File`, `HashMap`, `OpenOptions`, `Read`, and `any`
[INFO] [stderr]  --> src/printer.rs:1:25
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::{collections::{HashMap, HashSet}, any, fs::{File, OpenOptions}, fmt::Display, io::{Write, Read}, i32};
[INFO] [stderr]   |                         ^^^^^^^            ^^^       ^^^^  ^^^^^^^^^^^                             ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `msg_state`
[INFO] [stderr]   --> src/printer.rs:95:7
[INFO] [stderr]    |
[INFO] [stderr] 95 |   let msg_state: Message = Message::Move { x: 2, y: 4 };
[INFO] [stderr]    |       ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_msg_state`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/printer.rs:115:7
[INFO] [stderr]     |
[INFO] [stderr] 115 |   let mut name = "Testing.......";
[INFO] [stderr]     |       ----^^^^
[INFO] [stderr]     |       |
[INFO] [stderr]     |       help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `arr` is never read
[INFO] [stderr]    --> src/printer.rs:143:5
[INFO] [stderr]     |
[INFO] [stderr] 143 |     arr[3] = 80;
[INFO] [stderr]     |     ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `student_age`
[INFO] [stderr]    --> src/printer.rs:268:7
[INFO] [stderr]     |
[INFO] [stderr] 268 |   let student_age: Ages = Ages(12, 16, 18);
[INFO] [stderr]     |       ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_student_age`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/printer.rs:473:7
[INFO] [stderr]     |
[INFO] [stderr] 473 |   let mut a = [10, 20, 30];
[INFO] [stderr]     |       ----^
[INFO] [stderr]     |       |
[INFO] [stderr]     |       help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/printer.rs:475:7
[INFO] [stderr]     |
[INFO] [stderr] 475 |   let mut iter = a.iter();
[INFO] [stderr]     |       ----^^^^
[INFO] [stderr]     |       |
[INFO] [stderr]     |       help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: constant `LENGTH` is never used
[INFO] [stderr]  --> src/printer.rs:3:7
[INFO] [stderr]   |
[INFO] [stderr] 3 | const LENGTH: u32 = 20;
[INFO] [stderr]   |       ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `printer_fn` is never used
[INFO] [stderr]  --> src/printer.rs:9:8
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub fn printer_fn() {
[INFO] [stderr]   |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `machine_type` is never used
[INFO] [stderr]   --> src/printer.rs:30:8
[INFO] [stderr]    |
[INFO] [stderr] 30 | pub fn machine_type() {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `looping` is never used
[INFO] [stderr]   --> src/printer.rs:42:8
[INFO] [stderr]    |
[INFO] [stderr] 42 | pub fn looping() {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `loop_while` is never used
[INFO] [stderr]   --> src/printer.rs:55:8
[INFO] [stderr]    |
[INFO] [stderr] 55 | pub fn loop_while() {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `loop_for` is never used
[INFO] [stderr]   --> src/printer.rs:64:8
[INFO] [stderr]    |
[INFO] [stderr] 64 | pub fn loop_for() {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `Days` is never used
[INFO] [stderr]   --> src/printer.rs:71:6
[INFO] [stderr]    |
[INFO] [stderr] 71 | enum Days {
[INFO] [stderr]    |      ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `usin_enum` is never used
[INFO] [stderr]   --> src/printer.rs:75:8
[INFO] [stderr]    |
[INFO] [stderr] 75 | pub fn usin_enum() {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `using_constants` is never used
[INFO] [stderr]   --> src/printer.rs:98:8
[INFO] [stderr]    |
[INFO] [stderr] 98 | pub fn using_constants() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `using_tuple` is never used
[INFO] [stderr]    --> src/printer.rs:104:8
[INFO] [stderr]     |
[INFO] [stderr] 104 | pub fn using_tuple() { // can store value of different data type
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `print_str` is never used
[INFO] [stderr]    --> src/printer.rs:114:8
[INFO] [stderr]     |
[INFO] [stderr] 114 | pub fn print_str() {
[INFO] [stderr]     |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `using_array` is never used
[INFO] [stderr]    --> src/printer.rs:126:8
[INFO] [stderr]     |
[INFO] [stderr] 126 | pub fn using_array() { // can only store value of the same data time
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `print_arr` is never used
[INFO] [stderr]    --> src/printer.rs:158:8
[INFO] [stderr]     |
[INFO] [stderr] 158 | pub fn print_arr(arr: &mut[i32;4]) {
[INFO] [stderr]     |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `using_borrowing` is never used
[INFO] [stderr]    --> src/printer.rs:166:9
[INFO] [stderr]     |
[INFO] [stderr] 166 |  pub fn using_borrowing() {
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `using_slice` is never used
[INFO] [stderr]    --> src/printer.rs:212:8
[INFO] [stderr]     |
[INFO] [stderr] 212 | pub fn using_slice() {
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `using_struct` is never used
[INFO] [stderr]    --> src/printer.rs:231:8
[INFO] [stderr]     |
[INFO] [stderr] 231 | pub fn using_struct() {
[INFO] [stderr]     |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `method_in_struct` is never used
[INFO] [stderr]    --> src/printer.rs:274:8
[INFO] [stderr]     |
[INFO] [stderr] 274 | pub fn method_in_struct() {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `area` is never used
[INFO] [stderr]    --> src/printer.rs:279:10
[INFO] [stderr]     |
[INFO] [stderr] 278 |   impl  Rectangle {
[INFO] [stderr]     |   --------------- method in this implementation
[INFO] [stderr] 279 |       fn area(&self) {
[INFO] [stderr]     |          ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `static_struct_method` is never used
[INFO] [stderr]    --> src/printer.rs:287:8
[INFO] [stderr]     |
[INFO] [stderr] 287 | pub fn static_struct_method() {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `areaInstance` and `area` are never used
[INFO] [stderr]    --> src/printer.rs:292:10
[INFO] [stderr]     |
[INFO] [stderr] 291 |   impl  Rectangle {
[INFO] [stderr]     |   --------------- associated items in this implementation
[INFO] [stderr] 292 |       fn areaInstance(w: u32, h: u32) -> Rectangle {
[INFO] [stderr]     |          ^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 295 |       fn area(&self) {
[INFO] [stderr]     |          ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `option_enum` is never used
[INFO] [stderr]    --> src/printer.rs:303:8
[INFO] [stderr]     |
[INFO] [stderr] 303 | pub fn option_enum() {
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `using_vector` is never used
[INFO] [stderr]    --> src/printer.rs:329:8
[INFO] [stderr]     |
[INFO] [stderr] 329 | pub fn using_vector() {
[INFO] [stderr]     |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `using_hashmap` is never used
[INFO] [stderr]    --> src/printer.rs:345:8
[INFO] [stderr]     |
[INFO] [stderr] 345 | pub fn using_hashmap() {
[INFO] [stderr]     |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `working_on_errors` is never used
[INFO] [stderr]    --> src/printer.rs:377:8
[INFO] [stderr]     |
[INFO] [stderr] 377 | pub fn working_on_errors() -> Result<bool, String> {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `using_generics` is never used
[INFO] [stderr]    --> src/printer.rs:385:8
[INFO] [stderr]     |
[INFO] [stderr] 385 | pub fn using_generics() {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `using_traits` is never used
[INFO] [stderr]    --> src/printer.rs:400:8
[INFO] [stderr]     |
[INFO] [stderr] 400 | pub fn using_traits() {
[INFO] [stderr]     |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `read_write` is never used
[INFO] [stderr]    --> src/printer.rs:429:8
[INFO] [stderr]     |
[INFO] [stderr] 429 | pub fn read_write() {
[INFO] [stderr]     |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `working_with_file` is never used
[INFO] [stderr]    --> src/printer.rs:450:8
[INFO] [stderr]     |
[INFO] [stderr] 450 | pub fn working_with_file() {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `working_with_iterators` is never used
[INFO] [stderr]    --> src/printer.rs:472:8
[INFO] [stderr]     |
[INFO] [stderr] 472 | pub fn working_with_iterators() {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `using_closure` is never used
[INFO] [stderr]    --> src/printer.rs:491:8
[INFO] [stderr]     |
[INFO] [stderr] 491 | pub fn using_closure() {
[INFO] [stderr]     |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `using_smart_pointers` is never used
[INFO] [stderr]    --> src/printer.rs:499:8
[INFO] [stderr]     |
[INFO] [stderr] 499 | pub fn using_smart_pointers() {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `areaInstance` should have a snake case name
[INFO] [stderr]    --> src/printer.rs:292:10
[INFO] [stderr]     |
[INFO] [stderr] 292 |       fn areaInstance(w: u32, h: u32) -> Rectangle {
[INFO] [stderr]     |          ^^^^^^^^^^^^ help: convert the identifier to snake case: `area_instance`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `HelloWorld` (bin "HelloWorld" test) generated 39 warnings (run `cargo fix --bin "HelloWorld" -p HelloWorld --tests` to apply 6 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/HelloWorld-c90401f20425c364)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr] error: test failed, to rerun pass `--bin HelloWorld`
[INFO] [stdout] test should_fail ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- should_fail stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'should_fail' (17) panicked at src/main.rs:13:5:
[INFO] [stdout] not implemented
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x61af96875b02 - std::backtrace_rs::backtrace::libunwind::trace::h786de35fecf3582f
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x61af96875b02 - std::backtrace_rs::backtrace::trace_unsynchronized::h4a7da1a2a64387f1
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x61af96875b02 - std::sys::backtrace::_print_fmt::h6bd7d500070c788c
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x61af96875b02 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h6d82c1afff976903
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x61af9688593f - core::fmt::rt::Argument::fmt::hc4ce6d643d397690
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x61af9688593f - core::fmt::write::hb1e7ca88b6a3936e
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/core/src/fmt/mod.rs:1469:25
[INFO] [stdout]    6:     0x61af968434a3 - std::io::default_write_fmt::haffd49d96f1984a8
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x61af968434a3 - std::io::Write::write_fmt::h027871c57cf57c01
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/io/mod.rs:1954:13
[INFO] [stdout]    8:     0x61af9684f372 - std::sys::backtrace::BacktraceLock::print::ha2430613ee79d059
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x61af96853e4f - std::panicking::default_hook::{{closure}}::hdbd2db9e5c303cf6
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panicking.rs:301:27
[INFO] [stdout]   10:     0x61af96853ce1 - std::panicking::default_hook::hed93c70cba5fdcf0
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panicking.rs:325:9
[INFO] [stdout]   11:     0x61af96816eae - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hd0ee8b569efc6a07
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/alloc/src/boxed.rs:2099:9
[INFO] [stdout]   12:     0x61af96816eae - test::test_main_with_exit_callback::{{closure}}::hf10864b576ecd15d
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x61af9685445f - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h3a55ca34534c0d00
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/alloc/src/boxed.rs:2099:9
[INFO] [stdout]   14:     0x61af9685445f - std::panicking::panic_with_hook::h3862d766c2cec19b
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panicking.rs:842:13
[INFO] [stdout]   15:     0x61af96854286 - std::panicking::panic_handler::{{closure}}::hb95eb402b5e28ee1
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panicking.rs:700:13
[INFO] [stdout]   16:     0x61af9684f4a9 - std::sys::backtrace::__rust_end_short_backtrace::hf73a26dc1835d85a
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/sys/backtrace.rs:174:18
[INFO] [stdout]   17:     0x61af96837d9d - __rustc[6ed5915ee467787]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panicking.rs:698:5
[INFO] [stdout]   18:     0x61af9688d080 - core::panicking::panic_fmt::h3454303eb8e6f7cd
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/core/src/panicking.rs:80:14
[INFO] [stdout]   19:     0x61af9688d05c - core::panicking::panic::hb290d809a6d6b140
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/core/src/panicking.rs:150:5
[INFO] [stdout]   20:     0x61af967f597a - HelloWorld::should_fail::h0d644d171cd43510
[INFO] [stdout]                                at /opt/rustwide/workdir/src/main.rs:13:5
[INFO] [stdout]   21:     0x61af967f5997 - HelloWorld::should_fail::{{closure}}::h25492abb6fb065a0
[INFO] [stdout]                                at /opt/rustwide/workdir/src/main.rs:12:17
[INFO] [stdout]   22:     0x61af967f5b16 - core::ops::function::FnOnce::call_once::hfa0bc538fcb94a9b
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x61af96816c8b - core::ops::function::FnOnce::call_once::ha729ee35d2fab541
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x61af96816c8b - test::__rust_begin_short_backtrace::ha40f4db8207e1111
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/test/src/lib.rs:663:18
[INFO] [stdout]   25:     0x61af9682ad0d - test::run_test_in_process::{{closure}}::hc1b77cda5d44f0f3
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/test/src/lib.rs:686:74
[INFO] [stdout]   26:     0x61af9682ad0d - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h1dbea1de64785521
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   27:     0x61af9682ad0d - std::panicking::catch_unwind::do_call::hd5febe9affd5a1b3
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panicking.rs:590:40
[INFO] [stdout]   28:     0x61af9682ad0d - std::panicking::catch_unwind::h51ea89627559b6f4
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panicking.rs:553:19
[INFO] [stdout]   29:     0x61af9682ad0d - std::panic::catch_unwind::hb8b8c2367cae3d66
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panic.rs:359:14
[INFO] [stdout]   30:     0x61af9682ad0d - test::run_test_in_process::ha5b55801407ea100
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/test/src/lib.rs:686:27
[INFO] [stdout]   31:     0x61af9682ad0d - test::run_test::{{closure}}::h0b9d4072b527abf5
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/test/src/lib.rs:607:43
[INFO] [stdout]   32:     0x61af96804224 - test::run_test::{{closure}}::hb1056b5731205822
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/test/src/lib.rs:637:41
[INFO] [stdout]   33:     0x61af96804224 - std::sys::backtrace::__rust_begin_short_backtrace::hb61ff5a34023c7ef
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/sys/backtrace.rs:158:18
[INFO] [stdout]   34:     0x61af96807b5a - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hb0a83c0e8b353cff
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/thread/mod.rs:562:17
[INFO] [stdout]   35:     0x61af96807b5a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hb4f32cb008535298
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   36:     0x61af96807b5a - std::panicking::catch_unwind::do_call::h16d110e4fc35789a
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panicking.rs:590:40
[INFO] [stdout]   37:     0x61af96807b5a - std::panicking::catch_unwind::hea9118f355699c4b
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panicking.rs:553:19
[INFO] [stdout]   38:     0x61af96807b5a - std::panic::catch_unwind::hf4b3c2a06d3f42f5
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/panic.rs:359:14
[INFO] [stdout]   39:     0x61af96807b5a - std::thread::Builder::spawn_unchecked_::{{closure}}::h3f4cb733a52d53d5
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/thread/mod.rs:560:30
[INFO] [stdout]   40:     0x61af96807b5a - core::ops::function::FnOnce::call_once{{vtable.shim}}::h4052f0967b37caeb
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   41:     0x61af9684a8af - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h7ec433abd3f148b4
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/alloc/src/boxed.rs:2085:9
[INFO] [stdout]   42:     0x61af9684a8af - std::sys::thread::unix::Thread::new::thread_start::he514622d3d7ba65c
[INFO] [stdout]                                at /rustc/1ef7943ee607160a564655b6596f83670ef95df5/library/std/src/sys/thread/unix.rs:124:17
[INFO] [stdout]   43:     0x7c445c183aa4 - <unknown>
[INFO] [stdout]   44:     0x7c445c210a64 - clone
[INFO] [stdout]   45:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     should_fail
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "22c6b060ddbe6e92fc849a7911a425af4300db6cec7b709bfa957b97505e6c6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22c6b060ddbe6e92fc849a7911a425af4300db6cec7b709bfa957b97505e6c6d", kill_on_drop: false }`
[INFO] [stdout] 22c6b060ddbe6e92fc849a7911a425af4300db6cec7b709bfa957b97505e6c6d
