[INFO] cloning repository https://github.com/Dyno-man/Os_Project_1
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Dyno-man/Os_Project_1" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDyno-man%2FOs_Project_1", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDyno-man%2FOs_Project_1'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9558f62e03c7ce036a0d355c952b0f773bd778b7
[INFO] checking Dyno-man/Os_Project_1/9558f62e03c7ce036a0d355c952b0f773bd778b7 against 0b63defc8fd68957c635fe61f097b84df8fd9611 for pr-154715
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDyno-man%2FOs_Project_1" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Dyno-man/Os_Project_1
[INFO] finished tweaking git repo https://github.com/Dyno-man/Os_Project_1
[INFO] tweaked toml for git repo https://github.com/Dyno-man/Os_Project_1 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Dyno-man/Os_Project_1 on toolchain 0b63defc8fd68957c635fe61f097b84df8fd9611
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0b63defc8fd68957c635fe61f097b84df8fd9611" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Dyno-man/Os_Project_1 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" "+0b63defc8fd68957c635fe61f097b84df8fd9611" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rand_core v0.9.0
[INFO] [stderr]   Downloaded wasi v0.13.3+wasi-0.2.2
[INFO] [stderr]   Downloaded wit-bindgen-rt v0.33.0
[INFO] [stderr]   Downloaded getrandom v0.3.1
[INFO] [stderr]   Downloaded zerocopy-derive v0.8.15
[INFO] [stderr]   Downloaded zerocopy v0.8.15
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:00c5645b54fe3ce5dae1417175e3c7fb6a6646c021d554ecd63a097b8b9f3602" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 330fbd3cab54292e3ed414ae1342abfa7e4a8654a1cb92cd5da67f374f9e4ad8
[INFO] running `Command { std: "docker" "start" "330fbd3cab54292e3ed414ae1342abfa7e4a8654a1cb92cd5da67f374f9e4ad8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "330fbd3cab54292e3ed414ae1342abfa7e4a8654a1cb92cd5da67f374f9e4ad8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "330fbd3cab54292e3ed414ae1342abfa7e4a8654a1cb92cd5da67f374f9e4ad8" "/opt/rustwide/cargo-home/bin/cargo" "+0b63defc8fd68957c635fe61f097b84df8fd9611" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "330fbd3cab54292e3ed414ae1342abfa7e4a8654a1cb92cd5da67f374f9e4ad8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "330fbd3cab54292e3ed414ae1342abfa7e4a8654a1cb92cd5da67f374f9e4ad8" "/opt/rustwide/cargo-home/bin/cargo" "+0b63defc8fd68957c635fe61f097b84df8fd9611" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-ident v1.0.16
[INFO] [stderr]    Compiling libc v0.2.169
[INFO] [stderr]    Compiling getrandom v0.3.1
[INFO] [stderr]    Compiling zerocopy v0.8.15
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.93
[INFO] [stderr]    Compiling quote v1.0.38
[INFO] [stderr]    Compiling syn v2.0.98
[INFO] [stderr]     Checking rand_core v0.9.0
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]     Checking zerocopy v0.7.35
[INFO] [stderr]     Checking ppv-lite86 v0.2.20
[INFO] [stderr]     Checking rand_chacha v0.9.0
[INFO] [stderr]     Checking rand v0.9.0
[INFO] [stderr]     Checking library-management-system v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Sender`
[INFO] [stdout]  --> src/book_action_logger.rs:3:29
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::sync::mpsc::{self, Sender};
[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: `std::time::Duration`
[INFO] [stdout]  --> src/book_action_logger.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::time::Duration;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::book::*`
[INFO] [stdout]  --> src/book_action_logger.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use crate::book::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `fill_book_data` and `fill_user_data`
[INFO] [stdout]   --> src/main.rs:35:24
[INFO] [stdout]    |
[INFO] [stdout] 35 | use book::{Book, User, fill_book_data, fill_user_data};
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `book_action_logger::*`
[INFO] [stdout]   --> src/main.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 37 | use book_action_logger::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `stdin`
[INFO] [stdout]   --> src/main.rs:40:15
[INFO] [stdout]    |
[INFO] [stdout] 40 | use std::io::{stdin};
[INFO] [stdout]    |               ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `rand::thread_rng`: renamed to `rng`
[INFO] [stdout]   --> src/main.rs:73:25
[INFO] [stdout]    |
[INFO] [stdout] 73 |     let mut rng = rand::thread_rng();
[INFO] [stdout]    |                         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Sender`
[INFO] [stdout]  --> src/book_action_logger.rs:3:29
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::sync::mpsc::{self, Sender};
[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: `std::time::Duration`
[INFO] [stdout]  --> src/book_action_logger.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::time::Duration;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::book::*`
[INFO] [stdout]  --> src/book_action_logger.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use crate::book::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `fill_book_data` and `fill_user_data`
[INFO] [stdout]   --> src/main.rs:35:24
[INFO] [stdout]    |
[INFO] [stdout] 35 | use book::{Book, User, fill_book_data, fill_user_data};
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `book_action_logger::*`
[INFO] [stdout]   --> src/main.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 37 | use book_action_logger::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `stdin`
[INFO] [stdout]   --> src/main.rs:40:15
[INFO] [stdout]    |
[INFO] [stdout] 40 | use std::io::{stdin};
[INFO] [stdout]    |               ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stdout]   --> src/main.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |     rng.gen_range(min..max)
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `rand::thread_rng`: renamed to `rng`
[INFO] [stdout]   --> src/main.rs:73:25
[INFO] [stdout]    |
[INFO] [stdout] 73 |     let mut rng = rand::thread_rng();
[INFO] [stdout]    |                         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/book_shipment_log.rs:48:17
[INFO] [stdout]    |
[INFO] [stdout] 48 |             let mut num = rng.random_range(0..2);
[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: unnecessary `unsafe` block
[INFO] [stdout]    --> src/main.rs:113:9
[INFO] [stdout]     |
[INFO] [stdout] 113 |         unsafe{
[INFO] [stdout]     |         ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_unsafe)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lib_guard`
[INFO] [stdout]    --> src/main.rs:298:17
[INFO] [stdout]     |
[INFO] [stdout] 298 |             let lib_guard = lib_b.lock().unwrap();
[INFO] [stdout]     |                 ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_lib_guard`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lib_guard`
[INFO] [stdout]    --> src/main.rs:288:17
[INFO] [stdout]     |
[INFO] [stdout] 288 |             let lib_guard = lib_a.lock().unwrap();
[INFO] [stdout]     |                 ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_lib_guard`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `print_book`, `borrow`, and `return_book` are never used
[INFO] [stdout]   --> src/book.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl Book {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 16 |     pub fn new(title: String, author: String, isbn: String, borrowed: bool) -> Book {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     pub fn print_book(&self){
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     pub fn borrow(&mut self){
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |     pub fn return_book(&mut self){
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `print_user` are never used
[INFO] [stdout]   --> src/book.rs:45:12
[INFO] [stdout]    |
[INFO] [stdout] 44 | impl User {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 45 |     pub fn new(username: String, loaned_books: Vec<Book>) -> User {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 52 |     pub fn print_user(&self) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fill_book_data` is never used
[INFO] [stdout]   --> src/book.rs:73:8
[INFO] [stdout]    |
[INFO] [stdout] 73 | pub fn fill_book_data(mut lib: Vec<Book>) -> Vec<Book> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fill_user_data` is never used
[INFO] [stdout]    --> src/book.rs:109:8
[INFO] [stdout]     |
[INFO] [stdout] 109 | pub fn fill_user_data(mut member: Vec<User>) -> Vec<User> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `LogEvent` is never used
[INFO] [stdout]  --> src/book_action_logger.rs:9:6
[INFO] [stdout]   |
[INFO] [stdout] 9 | enum LogEvent {
[INFO] [stdout]   |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `start_logger` is never used
[INFO] [stdout]   --> src/book_action_logger.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn start_logger(rx: mpsc::Receiver<LogEvent>) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/main.rs:79:12
[INFO] [stdout]    |
[INFO] [stdout] 79 |     mutex: &Mutex<T>,
[INFO] [stdout]    |            ^^^^^^^^^ the lifetime is elided here
[INFO] [stdout] 80 |     timeout: Duration
[INFO] [stdout] 81 | ) -> Option<std::sync::MutexGuard<T>> {
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 81 | ) -> Option<std::sync::MutexGuard<'_, T>> {
[INFO] [stdout]    |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stdout]   --> src/main.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |     rng.gen_range(min..max)
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/book_shipment_log.rs:48:17
[INFO] [stdout]    |
[INFO] [stdout] 48 |             let mut num = rng.random_range(0..2);
[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: unnecessary `unsafe` block
[INFO] [stdout]    --> src/main.rs:113:9
[INFO] [stdout]     |
[INFO] [stdout] 113 |         unsafe{
[INFO] [stdout]     |         ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_unsafe)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lib_guard`
[INFO] [stdout]    --> src/main.rs:298:17
[INFO] [stdout]     |
[INFO] [stdout] 298 |             let lib_guard = lib_b.lock().unwrap();
[INFO] [stdout]     |                 ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_lib_guard`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lib_guard`
[INFO] [stdout]    --> src/main.rs:288:17
[INFO] [stdout]     |
[INFO] [stdout] 288 |             let lib_guard = lib_a.lock().unwrap();
[INFO] [stdout]     |                 ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_lib_guard`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `print_book`, `borrow`, and `return_book` are never used
[INFO] [stdout]   --> src/book.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl Book {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 16 |     pub fn new(title: String, author: String, isbn: String, borrowed: bool) -> Book {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     pub fn print_book(&self){
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     pub fn borrow(&mut self){
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |     pub fn return_book(&mut self){
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `print_user` are never used
[INFO] [stdout]   --> src/book.rs:45:12
[INFO] [stdout]    |
[INFO] [stdout] 44 | impl User {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 45 |     pub fn new(username: String, loaned_books: Vec<Book>) -> User {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 52 |     pub fn print_user(&self) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fill_book_data` is never used
[INFO] [stdout]   --> src/book.rs:73:8
[INFO] [stdout]    |
[INFO] [stdout] 73 | pub fn fill_book_data(mut lib: Vec<Book>) -> Vec<Book> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fill_user_data` is never used
[INFO] [stdout]    --> src/book.rs:109:8
[INFO] [stdout]     |
[INFO] [stdout] 109 | pub fn fill_user_data(mut member: Vec<User>) -> Vec<User> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `LogEvent` is never used
[INFO] [stdout]  --> src/book_action_logger.rs:9:6
[INFO] [stdout]   |
[INFO] [stdout] 9 | enum LogEvent {
[INFO] [stdout]   |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `start_logger` is never used
[INFO] [stdout]   --> src/book_action_logger.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn start_logger(rx: mpsc::Receiver<LogEvent>) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/main.rs:79:12
[INFO] [stdout]    |
[INFO] [stdout] 79 |     mutex: &Mutex<T>,
[INFO] [stdout]    |            ^^^^^^^^^ the lifetime is elided here
[INFO] [stdout] 80 |     timeout: Duration
[INFO] [stdout] 81 | ) -> Option<std::sync::MutexGuard<T>> {
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 81 | ) -> Option<std::sync::MutexGuard<'_, T>> {
[INFO] [stdout]    |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.36s
[INFO] running `Command { std: "docker" "inspect" "330fbd3cab54292e3ed414ae1342abfa7e4a8654a1cb92cd5da67f374f9e4ad8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "330fbd3cab54292e3ed414ae1342abfa7e4a8654a1cb92cd5da67f374f9e4ad8", kill_on_drop: false }`
[INFO] [stdout] 330fbd3cab54292e3ed414ae1342abfa7e4a8654a1cb92cd5da67f374f9e4ad8
