[INFO] cloning repository https://github.com/timothyjulian/rust-refresh
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/timothyjulian/rust-refresh" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftimothyjulian%2Frust-refresh", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftimothyjulian%2Frust-refresh'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 31908168feb36266ed60197084ff6a2d90109175
[INFO] checking timothyjulian/rust-refresh against try#349c4bfa6ac87b818f6fd19d4869c0b24790ac6a for pr-152856
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftimothyjulian%2Frust-refresh" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/timothyjulian/rust-refresh
[INFO] finished tweaking git repo https://github.com/timothyjulian/rust-refresh
[INFO] tweaked toml for git repo https://github.com/timothyjulian/rust-refresh written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/timothyjulian/rust-refresh on toolchain 349c4bfa6ac87b818f6fd19d4869c0b24790ac6a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+349c4bfa6ac87b818f6fd19d4869c0b24790ac6a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/timothyjulian/rust-refresh 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" "+349c4bfa6ac87b818f6fd19d4869c0b24790ac6a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking timothyjulian/rust-refresh against try#349c4bfa6ac87b818f6fd19d4869c0b24790ac6a for pr-152856
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftimothyjulian%2Frust-refresh" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/timothyjulian/rust-refresh
[INFO] finished tweaking git repo https://github.com/timothyjulian/rust-refresh
[INFO] tweaked toml for git repo https://github.com/timothyjulian/rust-refresh written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/timothyjulian/rust-refresh on toolchain 349c4bfa6ac87b818f6fd19d4869c0b24790ac6a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+349c4bfa6ac87b818f6fd19d4869c0b24790ac6a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/timothyjulian/rust-refresh 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" "+349c4bfa6ac87b818f6fd19d4869c0b24790ac6a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+349c4bfa6ac87b818f6fd19d4869c0b24790ac6a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] efdcf8ff5bd9f80e971c88f197a5d7a46f2c5d9eea8a80427391d7ab96391cec
[INFO] running `Command { std: "docker" "start" "-a" "efdcf8ff5bd9f80e971c88f197a5d7a46f2c5d9eea8a80427391d7ab96391cec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "efdcf8ff5bd9f80e971c88f197a5d7a46f2c5d9eea8a80427391d7ab96391cec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "efdcf8ff5bd9f80e971c88f197a5d7a46f2c5d9eea8a80427391d7ab96391cec", kill_on_drop: false }`
[INFO] [stdout] efdcf8ff5bd9f80e971c88f197a5d7a46f2c5d9eea8a80427391d7ab96391cec
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+349c4bfa6ac87b818f6fd19d4869c0b24790ac6a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2147db50287c554f92a3a203537c55e71086eadea77e4d1bc76406bef6921791
[INFO] running `Command { std: "docker" "start" "-a" "2147db50287c554f92a3a203537c55e71086eadea77e4d1bc76406bef6921791", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-refresh v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::struct_type::GeoPoint`
[INFO] [stdout]  --> src/enumer.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::struct_type::GeoPoint;
[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 import: `crate::struct_type::Person`
[INFO] [stdout]  --> src/enumer.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::struct_type::Person;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `SimplePerson`
[INFO] [stdout]  --> src/generic.rs:1:36
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::traits::{CanSayGoodbye, SimplePerson};
[INFO] [stdout]   |                                    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition: `hi`
[INFO] [stdout]  --> src/macros.rs:1:14
[INFO] [stdout]   |
[INFO] [stdout] 1 | macro_rules! hi {
[INFO] [stdout]   |              ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_macros)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition: `iterate`
[INFO] [stdout]   --> src/macros.rs:10:14
[INFO] [stdout]    |
[INFO] [stdout] 10 | macro_rules! iterate {
[INFO] [stdout]    |              ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BTreeMap` and `HashMap`
[INFO] [stdout]  --> src/maps.rs:1:24
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::{BTreeMap, HashMap};
[INFO] [stdout]   |                        ^^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `LinkedList` and `VecDeque`
[INFO] [stdout]  --> src/sequences.rs:1:24
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::{LinkedList, VecDeque};
[INFO] [stdout]   |                        ^^^^^^^^^^  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BTreeSet` and `HashSet`
[INFO] [stdout]  --> src/sets.rs:1:24
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::{BTreeSet, HashSet};
[INFO] [stdout]   |                        ^^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `unit` is never used
[INFO] [stdout]   --> src/main.rs:54:4
[INFO] [stdout]    |
[INFO] [stdout] 54 | fn unit() {
[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 `say_goodbye` is never used
[INFO] [stdout]    --> src/main.rs:165:4
[INFO] [stdout]     |
[INFO] [stdout] 165 | fn say_goodbye(first_name: &str, last_name: &str) {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `factorial_loop` is never used
[INFO] [stdout]    --> src/main.rs:176:4
[INFO] [stdout]     |
[INFO] [stdout] 176 | fn factorial_loop(n: i32) -> i32 {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Company` is never constructed
[INFO] [stdout]  --> src/attributes.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Company {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_map` is never used
[INFO] [stdout]  --> src/closure.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn print_map(value: &String, map_fn: fn(&String) -> String) {
[INFO] [stdout]   |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `to_uppercase` is never used
[INFO] [stdout]   --> src/closure.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn to_uppercase(value: &String) -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Apple` is never constructed
[INFO] [stdout]  --> src/comparing.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Apple {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Book` is never constructed
[INFO] [stdout]  --> src/drop.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Book {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Level` is never used
[INFO] [stdout]  --> src/enumer.rs:4:6
[INFO] [stdout]   |
[INFO] [stdout] 4 | enum Level {
[INFO] [stdout]   |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Payment` is never used
[INFO] [stdout]   --> src/enumer.rs:10:6
[INFO] [stdout]    |
[INFO] [stdout] 10 | enum Payment {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `pay` is never used
[INFO] [stdout]   --> src/enumer.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl Payment {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] 17 |     fn pay(&self, amount: u32) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Category` is never constructed
[INFO] [stdout]  --> src/format.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Category {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]  --> src/generic.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Point<T = i32> {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get_x` and `get_y` are never used
[INFO] [stdout]   --> src/generic.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl<T> Point<T> {
[INFO] [stdout]    | ---------------- methods in this implementation
[INFO] [stdout] 10 |     fn get_x(&self) -> &T {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 13 |     fn get_y(&self) -> &T {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `GetValue` is never used
[INFO] [stdout]   --> src/generic.rs:18:7
[INFO] [stdout]    |
[INFO] [stdout] 18 | trait GetValue<T>
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Hi` is never constructed
[INFO] [stdout]   --> src/generic.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | struct Hi<T: CanSayGoodbye> {
[INFO] [stdout]    |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Value` is never used
[INFO] [stdout]   --> src/generic.rs:38:6
[INFO] [stdout]    |
[INFO] [stdout] 38 | enum Value<T> {
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `min` is never used
[INFO] [stdout]   --> src/generic.rs:43:4
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn min<T: PartialOrd>(value1: T, value2: T) -> T {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Student` is never constructed
[INFO] [stdout]  --> src/lifetimes.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Student<'a, 'b, T>
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `longest_name` is never used
[INFO] [stdout]   --> src/lifetimes.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | / impl<'a, 'b, T> Student<'a, 'b, T>
[INFO] [stdout] 11 | | where
[INFO] [stdout] 12 | |     T: Ord,
[INFO] [stdout]    | |___________- method in this implementation
[INFO] [stdout] 13 |   {
[INFO] [stdout] 14 |       fn longest_name(&self, student: &Student<'a, 'b, T>) -> &'a str {
[INFO] [stdout]    |          ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest` is never used
[INFO] [stdout]   --> src/lifetimes.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn longest<'a>(value1: &'a str, value2: &'a str) -> &'a str {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest_name_student` is never used
[INFO] [stdout]   --> src/lifetimes.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn longest_name_student<'a, 'b, T>(
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `double` is never used
[INFO] [stdout]  --> src/options.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn double(x: Option<i32>) -> Option<i32> {
[INFO] [stdout]   |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Apple` is never constructed
[INFO] [stdout]  --> src/overload_operator.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Apple {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_ownership` is never used
[INFO] [stdout]   --> src/ownership.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn print_ownership(name: String) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `return_ownership` is never used
[INFO] [stdout]   --> src/ownership.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn return_ownership(first_name: String, second_name: String) -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `return_borrow` is never used
[INFO] [stdout]   --> src/ownership.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn return_borrow(first_name: &String, second_name: &String) -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `mutable_reference` is never used
[INFO] [stdout]   --> src/ownership.rs:50:4
[INFO] [stdout]    |
[INFO] [stdout] 50 | fn mutable_reference(first_name: &mut String) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_text` is never used
[INFO] [stdout]  --> src/recursive.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn print_text(value: String, times: u32) {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `factorial_recursive` is never used
[INFO] [stdout]   --> src/recursive.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn factorial_recursive(n: u32) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ProductCategory` is never used
[INFO] [stdout]  --> src/smart_pointer.rs:4:6
[INFO] [stdout]   |
[INFO] [stdout] 4 | enum ProductCategory {
[INFO] [stdout]   |      ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyValue` is never constructed
[INFO] [stdout]  --> src/smart_pointer.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct MyValue<T> {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Seller` is never constructed
[INFO] [stdout]   --> src/smart_pointer.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | struct Seller {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Brand` is never used
[INFO] [stdout]   --> src/smart_pointer.rs:28:6
[INFO] [stdout]    |
[INFO] [stdout] 28 | enum Brand {
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `display_number` is never used
[INFO] [stdout]   --> src/smart_pointer.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn display_number(value: i32) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `display_number_reference` is never used
[INFO] [stdout]   --> src/smart_pointer.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn display_number_reference(value: &i32) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_category` is never used
[INFO] [stdout]   --> src/smart_pointer.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn print_category(category: &ProductCategory) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `say_hello` is never used
[INFO] [stdout]   --> src/smart_pointer.rs:45:4
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn say_hello(name: &String) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `APPLICATION` is never used
[INFO] [stdout]  --> src/statics.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | static APPLICATION: &str = "My Application";
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `COUNTER` is never used
[INFO] [stdout]  --> src/statics.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | static mut COUNTER: u32 = 0;
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `increment` is never used
[INFO] [stdout]  --> src/statics.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 | unsafe fn increment() {
[INFO] [stdout]   |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]  --> src/struct_type.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Person {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `GeoPoint` is never constructed
[INFO] [stdout]  --> src/struct_type.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct GeoPoint(pub f64, pub f64);
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_person` is never used
[INFO] [stdout]  --> src/struct_type.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn print_person(person: &Person) {
[INFO] [stdout]   |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `say_hello` is never used
[INFO] [stdout]   --> src/struct_type.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl Person {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] 16 |     pub fn say_hello(&self, name: &str) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/struct_type.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl GeoPoint {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 22 |     pub fn new(long: f64, lat: f64) -> GeoPoint {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SimplePerson` is never constructed
[INFO] [stdout]  --> src/traits.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct SimplePerson {
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `CanSayHello` is never used
[INFO] [stdout]  --> src/traits.rs:7:7
[INFO] [stdout]   |
[INFO] [stdout] 7 | trait CanSayHello {
[INFO] [stdout]   |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `CanSayGoodbye` is never used
[INFO] [stdout]   --> src/traits.rs:16:11
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub trait CanSayGoodbye {
[INFO] [stdout]    |           ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `CanSay` is never used
[INFO] [stdout]   --> src/traits.rs:22:7
[INFO] [stdout]    |
[INFO] [stdout] 22 | trait CanSay: CanSayHello + CanSayGoodbye {
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `say_hello_trait` is never used
[INFO] [stdout]   --> src/traits.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn say_hello_trait(value: &impl CanSayHello) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `say_goodbye_and_hello` is never used
[INFO] [stdout]   --> src/traits.rs:67:4
[INFO] [stdout]    |
[INFO] [stdout] 67 | fn say_goodbye_and_hello(value: &(impl CanSayHello + CanSayGoodbye)) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_simple_person` is never used
[INFO] [stdout]   --> src/traits.rs:72:4
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn create_simple_person(name: String) -> impl CanSayGoodbye {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `connect_database` is never used
[INFO] [stdout]  --> src/error_handling.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn connect_database(host: Option<String>) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `connect_cache` is never used
[INFO] [stdout]  --> src/error_handling.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn connect_cache(host: &Option<String>) -> Result<String, String> {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `connect_mq` is never used
[INFO] [stdout]   --> src/error_handling.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn connect_mq(host: &Option<String>) -> Result<String, String> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `connect_app` is never used
[INFO] [stdout]   --> src/error_handling.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn connect_app(host: Option<String>) -> Result<String, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ownership.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let mut first_name = String::from("Tim");
[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 `b` is never read
[INFO] [stdout]    --> src/main.rs:113:17
[INFO] [stdout]     |
[INFO] [stdout] 113 |     let mut b = a; //copy data
[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: variants `Regular` and `Premium` are never constructed
[INFO] [stdout]  --> src/enumer.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | enum Level {
[INFO] [stdout]   |      ----- variants in this enum
[INFO] [stdout] 5 |     Regular,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 6 |     Premium,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `CreditCard` and `EWallet` are never constructed
[INFO] [stdout]   --> src/enumer.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | enum Payment {
[INFO] [stdout]    |      ------- variants in this enum
[INFO] [stdout] 11 |     CreditCard(String),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 12 |     BankTransfer(String, String),
[INFO] [stdout] 13 |     EWallet(String, String),
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `NONE` is never constructed
[INFO] [stdout]   --> src/generic.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 38 | enum Value<T> {
[INFO] [stdout]    |      ----- variant in this enum
[INFO] [stdout] 39 |     NONE,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `last_name` is never read
[INFO] [stdout]  --> src/lifetimes.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Student<'a, 'b, T>
[INFO] [stdout]   |        ------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 6 |     last_name: &'b str,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> src/smart_pointer.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Of(String, Box<ProductCategory>),
[INFO] [stdout]   |     -- ^^^^^^  ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     fields in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `ProductCategory` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]   |
[INFO] [stdout] 5 -     Of(String, Box<ProductCategory>),
[INFO] [stdout] 5 +     Of((), ()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `active` is never read
[INFO] [stdout]   --> src/smart_pointer.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | struct Seller {
[INFO] [stdout]    |        ------ field in this struct
[INFO] [stdout] 23 |     name: RefCell<String>,
[INFO] [stdout] 24 |     active: RefCell<bool>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Seller` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/smart_pointer.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 |     Of(String, Rc<Brand>),
[INFO] [stdout]    |     -- ^^^^^^  ^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Brand` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 29 -     Of(String, Rc<Brand>),
[INFO] [stdout] 29 +     Of((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `say_goodbye_to` is never used
[INFO] [stdout]   --> src/traits.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub trait CanSayGoodbye {
[INFO] [stdout]    |           ------------- method in this trait
[INFO] [stdout] 17 |     fn say_goodbye(&self) -> String;
[INFO] [stdout] 18 |     fn say_goodbye_to(&self, name: &str) -> String;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `CanSay` is never used
[INFO] [stdout]   --> src/traits.rs:22:7
[INFO] [stdout]    |
[INFO] [stdout] 22 | trait CanSay: CanSayHello + CanSayGoodbye {
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test__student` should have a snake case name
[INFO] [stdout]   --> src/lifetimes.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn test__student() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^ help: convert the identifier to snake case: `test_student`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: creating a shared reference to mutable static
[INFO] [stdout]   --> src/statics.rs:19:33
[INFO] [stdout]    |
[INFO] [stdout] 19 |         println!("Counter: {}", COUNTER);
[INFO] [stdout]    |                                 ^^^^^^^ shared reference to mutable static
[INFO] [stdout]    |
[INFO] [stdout]    = note: shared references to mutable statics are dangerous; it's undefined behavior if the static is mutated or if a mutable reference is created for it while the shared reference lives
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/static-mut-references.html>
[INFO] [stdout]    = note: `#[warn(static_mut_refs)]` (part of `#[warn(rust_2024_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.20s
[INFO] running `Command { std: "docker" "inspect" "2147db50287c554f92a3a203537c55e71086eadea77e4d1bc76406bef6921791", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2147db50287c554f92a3a203537c55e71086eadea77e4d1bc76406bef6921791", kill_on_drop: false }`
[INFO] [stdout] 2147db50287c554f92a3a203537c55e71086eadea77e4d1bc76406bef6921791