[INFO] updating cached repository https://github.com/Guang1234567/minigrep
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ebf1c9da65374dbf50c51521d82a50ac9a8d16d8
[INFO] testing Guang1234567/minigrep against beta-2020-06-03 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGuang1234567%2Fminigrep" "/workspace/builds/worker-5/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Guang1234567/minigrep on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Guang1234567/minigrep
[INFO] finished tweaking git repo https://github.com/Guang1234567/minigrep
[INFO] tweaked toml for git repo https://github.com/Guang1234567/minigrep written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/Guang1234567/minigrep already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a0931da5037ce2ec66fbbb5266f48013093b0035bee9276c2aaab9ea31a19118
[INFO] running `"docker" "start" "-a" "a0931da5037ce2ec66fbbb5266f48013093b0035bee9276c2aaab9ea31a19118"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling futures-core-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling futures-io-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling tokio-trace-core v0.1.0
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling crossbeam-deque v0.7.1
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling tokio-threadpool v0.1.16
[INFO] [stderr]    Compiling futures-sink-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling futures-channel-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling tokio-io v0.1.12
[INFO] [stderr]    Compiling http v0.1.19
[INFO] [stderr]    Compiling string v0.2.1
[INFO] [stderr]    Compiling tokio-buf v0.1.1
[INFO] [stderr]    Compiling futures-util-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling tokio-reactor v0.1.10
[INFO] [stderr]    Compiling tokio v0.1.19
[INFO] [stderr]    Compiling tokio-tcp v0.1.3
[INFO] [stderr]    Compiling http-body v0.1.0
[INFO] [stderr]    Compiling h2 v0.1.26
[INFO] [stderr]    Compiling futures-executor-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling futures-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling hyper v0.12.35
[INFO] [stderr]    Compiling minigrep v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::error::Error`
[INFO] [stderr]  --> src/thread_pool/mod.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::error::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::future::Future`
[INFO] [stderr]  --> src/thread_pool/mod.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::future::Future;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `self`
[INFO] [stderr]  --> src/print/mod.rs:2:15
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io::{self, Write};
[INFO] [stderr]   |               ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Write`
[INFO] [stderr]  --> src/print/mod.rs:2:21
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io::{self, Write};
[INFO] [stderr]   |                     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `post`
[INFO] [stderr]  --> src/oop_demo/mod.rs:9:27
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn content<'a>(&self, post: &'a Post) -> &'a str {
[INFO] [stderr]   |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_post`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Cacher`
[INFO] [stderr]  --> src/cache/mod.rs:5:8
[INFO] [stderr]   |
[INFO] [stderr] 5 | struct Cacher<T, R>
[INFO] [stderr]   |        ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/cache/mod.rs:12:8
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn new(calculation: T) -> Self {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `value`
[INFO] [stderr]   --> src/cache/mod.rs:20:8
[INFO] [stderr]    |
[INFO] [stderr] 20 |     fn value<U>(&mut self, arg: U) -> &R
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `value2`
[INFO] [stderr]   --> src/cache/mod.rs:36:8
[INFO] [stderr]    |
[INFO] [stderr] 36 |     fn value2<U>(&mut self, arg: U) -> &R
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `value3`
[INFO] [stderr]   --> src/cache/mod.rs:47:8
[INFO] [stderr]    |
[INFO] [stderr] 47 |     fn value3<U>(&mut self, arg: U) -> &R
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `is_some`
[INFO] [stderr]   --> src/cache/mod.rs:57:8
[INFO] [stderr]    |
[INFO] [stderr] 57 |     fn is_some(&self) -> bool {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `is_none`
[INFO] [stderr]   --> src/cache/mod.rs:64:8
[INFO] [stderr]    |
[INFO] [stderr] 64 |     fn is_none(&self) -> bool {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]  --> src/iterator/mod.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 |     fn new() -> Counter {
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]  --> src/deref/mod.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 |     fn new(x: T) -> MyBox<T> {
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `List`
[INFO] [stderr]  --> src/memory/mod.rs:4:6
[INFO] [stderr]   |
[INFO] [stderr] 4 | enum List {
[INFO] [stderr]   |      ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Cons`
[INFO] [stderr]   --> src/memory/mod.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     Cons(T, RefCell<Rc<ListMemoryLeak<T>>>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Nil`
[INFO] [stderr]   --> src/memory/mod.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     Nil,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `tail`
[INFO] [stderr]   --> src/memory/mod.rs:16:8
[INFO] [stderr]    |
[INFO] [stderr] 16 |     fn tail(&self) -> Option<&RefCell<Rc<ListMemoryLeak<T>>>> {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Cons`
[INFO] [stderr]  --> src/rc/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     Cons(T, &'a Box<ListRefVersion<'a, T>>),
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Nil`
[INFO] [stderr]  --> src/rc/mod.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     Nil,
[INFO] [stderr]   |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Cons`
[INFO] [stderr]   --> src/rc/mod.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     Cons(T, Rc<ListRcVersion<T>>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Nil`
[INFO] [stderr]   --> src/rc/mod.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     Nil,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Cons`
[INFO] [stderr]   --> src/rc/mod.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     Cons(Rc<RefCell<T>>, Rc<ListRcRefVersion<T>>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Nil`
[INFO] [stderr]   --> src/rc/mod.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     Nil,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `LimitTracker`
[INFO] [stderr]  --> src/ref_demo/mod.rs:5:12
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub struct LimitTracker<'a, T>
[INFO] [stderr]   |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/ref_demo/mod.rs:16:12
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn new(messenger: &'a T, max: usize) -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `set_value`
[INFO] [stderr]   --> src/ref_demo/mod.rs:24:12
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn set_value(&mut self, value: usize) {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/oop_demo/mod.rs:24:8
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn new() -> Self {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/oop_demo/mod.rs:88:8
[INFO] [stderr]    |
[INFO] [stderr] 88 |     fn new() -> Self {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `add_text`
[INFO] [stderr]   --> src/oop_demo/mod.rs:95:12
[INFO] [stderr]    |
[INFO] [stderr] 95 |     pub fn add_text(&mut self, text: &str) {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `content`
[INFO] [stderr]   --> src/oop_demo/mod.rs:99:12
[INFO] [stderr]    |
[INFO] [stderr] 99 |     pub fn content(&self) -> &str {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `request_review`
[INFO] [stderr]    --> src/oop_demo/mod.rs:103:12
[INFO] [stderr]     |
[INFO] [stderr] 103 |     pub fn request_review(&mut self) {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `approve`
[INFO] [stderr]    --> src/oop_demo/mod.rs:109:12
[INFO] [stderr]     |
[INFO] [stderr] 109 |     pub fn approve(&mut self) {
[INFO] [stderr]     |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `id`
[INFO] [stderr]   --> src/thread_pool/mod.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     id: usize,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 34 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::env`
[INFO] [stderr]  --> src/main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::env;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::process`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::process;
[INFO] [stderr]   |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 30.27s
[INFO] running `"docker" "inspect" "a0931da5037ce2ec66fbbb5266f48013093b0035bee9276c2aaab9ea31a19118"`
[INFO] running `"docker" "rm" "-f" "a0931da5037ce2ec66fbbb5266f48013093b0035bee9276c2aaab9ea31a19118"`
[INFO] [stdout] a0931da5037ce2ec66fbbb5266f48013093b0035bee9276c2aaab9ea31a19118
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "test" "--frozen" "--no-run"`
[INFO] [stdout] 255b1cdbb95fbff7afaa420f5a837666d5331dadba0c4c0f97f02ba446d326a7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "255b1cdbb95fbff7afaa420f5a837666d5331dadba0c4c0f97f02ba446d326a7"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling minigrep v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::error::Error`
[INFO] [stderr]  --> src/thread_pool/mod.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::error::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::future::Future`
[INFO] [stderr]  --> src/thread_pool/mod.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::future::Future;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `self`
[INFO] [stderr]  --> src/print/mod.rs:2:15
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io::{self, Write};
[INFO] [stderr]   |               ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Write`
[INFO] [stderr]  --> src/print/mod.rs:2:21
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io::{self, Write};
[INFO] [stderr]   |                     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `post`
[INFO] [stderr]  --> src/oop_demo/mod.rs:9:27
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn content<'a>(&self, post: &'a Post) -> &'a str {
[INFO] [stderr]   |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_post`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Cacher`
[INFO] [stderr]  --> src/cache/mod.rs:5:8
[INFO] [stderr]   |
[INFO] [stderr] 5 | struct Cacher<T, R>
[INFO] [stderr]   |        ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/cache/mod.rs:12:8
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn new(calculation: T) -> Self {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `value`
[INFO] [stderr]   --> src/cache/mod.rs:20:8
[INFO] [stderr]    |
[INFO] [stderr] 20 |     fn value<U>(&mut self, arg: U) -> &R
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `value2`
[INFO] [stderr]   --> src/cache/mod.rs:36:8
[INFO] [stderr]    |
[INFO] [stderr] 36 |     fn value2<U>(&mut self, arg: U) -> &R
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `value3`
[INFO] [stderr]   --> src/cache/mod.rs:47:8
[INFO] [stderr]    |
[INFO] [stderr] 47 |     fn value3<U>(&mut self, arg: U) -> &R
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `is_some`
[INFO] [stderr]   --> src/cache/mod.rs:57:8
[INFO] [stderr]    |
[INFO] [stderr] 57 |     fn is_some(&self) -> bool {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `is_none`
[INFO] [stderr]   --> src/cache/mod.rs:64:8
[INFO] [stderr]    |
[INFO] [stderr] 64 |     fn is_none(&self) -> bool {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]  --> src/iterator/mod.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 |     fn new() -> Counter {
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]  --> src/deref/mod.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 |     fn new(x: T) -> MyBox<T> {
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `List`
[INFO] [stderr]  --> src/memory/mod.rs:4:6
[INFO] [stderr]   |
[INFO] [stderr] 4 | enum List {
[INFO] [stderr]   |      ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Cons`
[INFO] [stderr]   --> src/memory/mod.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     Cons(T, RefCell<Rc<ListMemoryLeak<T>>>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Nil`
[INFO] [stderr]   --> src/memory/mod.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     Nil,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `tail`
[INFO] [stderr]   --> src/memory/mod.rs:16:8
[INFO] [stderr]    |
[INFO] [stderr] 16 |     fn tail(&self) -> Option<&RefCell<Rc<ListMemoryLeak<T>>>> {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Cons`
[INFO] [stderr]  --> src/rc/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     Cons(T, &'a Box<ListRefVersion<'a, T>>),
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Nil`
[INFO] [stderr]  --> src/rc/mod.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     Nil,
[INFO] [stderr]   |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Cons`
[INFO] [stderr]   --> src/rc/mod.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     Cons(T, Rc<ListRcVersion<T>>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Nil`
[INFO] [stderr]   --> src/rc/mod.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     Nil,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Cons`
[INFO] [stderr]   --> src/rc/mod.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     Cons(Rc<RefCell<T>>, Rc<ListRcRefVersion<T>>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Nil`
[INFO] [stderr]   --> src/rc/mod.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     Nil,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `LimitTracker`
[INFO] [stderr]  --> src/ref_demo/mod.rs:5:12
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub struct LimitTracker<'a, T>
[INFO] [stderr]   |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/ref_demo/mod.rs:16:12
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn new(messenger: &'a T, max: usize) -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `set_value`
[INFO] [stderr]   --> src/ref_demo/mod.rs:24:12
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn set_value(&mut self, value: usize) {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/oop_demo/mod.rs:24:8
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn new() -> Self {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/oop_demo/mod.rs:88:8
[INFO] [stderr]    |
[INFO] [stderr] 88 |     fn new() -> Self {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `add_text`
[INFO] [stderr]   --> src/oop_demo/mod.rs:95:12
[INFO] [stderr]    |
[INFO] [stderr] 95 |     pub fn add_text(&mut self, text: &str) {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `content`
[INFO] [stderr]   --> src/oop_demo/mod.rs:99:12
[INFO] [stderr]    |
[INFO] [stderr] 99 |     pub fn content(&self) -> &str {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `request_review`
[INFO] [stderr]    --> src/oop_demo/mod.rs:103:12
[INFO] [stderr]     |
[INFO] [stderr] 103 |     pub fn request_review(&mut self) {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `approve`
[INFO] [stderr]    --> src/oop_demo/mod.rs:109:12
[INFO] [stderr]     |
[INFO] [stderr] 109 |     pub fn approve(&mut self) {
[INFO] [stderr]     |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `id`
[INFO] [stderr]   --> src/thread_pool/mod.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     id: usize,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 34 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]  --> src/thread_demo/mod.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |     use super::*;
[INFO] [stderr]   |         ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Arc`, `Mutex`
[INFO] [stderr]    --> src/oop_demo/mod.rs:119:21
[INFO] [stderr]     |
[INFO] [stderr] 119 |     use std::sync::{Arc, Mutex};
[INFO] [stderr]     |                     ^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::sync::mpsc`
[INFO] [stderr]    --> src/oop_demo/mod.rs:120:9
[INFO] [stderr]     |
[INFO] [stderr] 120 |     use std::sync::mpsc;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::thread`
[INFO] [stderr]    --> src/oop_demo/mod.rs:121:9
[INFO] [stderr]     |
[INFO] [stderr] 121 |     use std::thread;
[INFO] [stderr]     |         ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::time::Duration`
[INFO] [stderr]    --> src/oop_demo/mod.rs:122:9
[INFO] [stderr]     |
[INFO] [stderr] 122 |     use std::time::Duration;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]   --> src/server_demo/mod.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     use super::*;
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::error::Error`
[INFO] [stderr]  --> src/thread_pool/mod.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::error::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::future::Future`
[INFO] [stderr]  --> src/thread_pool/mod.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::future::Future;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::env`
[INFO] [stderr]  --> src/main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::env;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::process`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::process;
[INFO] [stderr]   |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `z`
[INFO] [stderr]   --> src/deref/mod.rs:27:13
[INFO] [stderr]    |
[INFO] [stderr] 27 |         let z = MyBox::new(String::from("Rust"));
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/memory/mod.rs:33:13
[INFO] [stderr]    |
[INFO] [stderr] 33 |         let b = Cons(3, a.clone());
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]   --> src/memory/mod.rs:34:13
[INFO] [stderr]    |
[INFO] [stderr] 34 |         let c = Cons(4, Rc::clone(&a));
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/rc/mod.rs:55:13
[INFO] [stderr]    |
[INFO] [stderr] 55 |         let b = Cons(3, Rc::clone(&a));
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]   --> src/rc/mod.rs:58:17
[INFO] [stderr]    |
[INFO] [stderr] 58 |             let c = Cons(4, Rc::clone(&a));
[INFO] [stderr]    |                 ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `producer`
[INFO] [stderr]   --> src/thread_demo/mod.rs:49:13
[INFO] [stderr]    |
[INFO] [stderr] 49 |         let producer = thread::spawn(move || {
[INFO] [stderr]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_producer`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `post`
[INFO] [stderr]  --> src/oop_demo/mod.rs:9:27
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn content<'a>(&self, post: &'a Post) -> &'a str {
[INFO] [stderr]   |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_post`
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `value`
[INFO] [stderr]   --> src/cache/mod.rs:20:8
[INFO] [stderr]    |
[INFO] [stderr] 20 |     fn value<U>(&mut self, arg: U) -> &R
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `value2`
[INFO] [stderr]   --> src/cache/mod.rs:36:8
[INFO] [stderr]    |
[INFO] [stderr] 36 |     fn value2<U>(&mut self, arg: U) -> &R
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `id`
[INFO] [stderr]   --> src/thread_pool/mod.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     id: usize,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/print/mod.rs:88:9
[INFO] [stderr]    |
[INFO] [stderr] 88 |         writeln!(&mut some_writer, "{} - {}", 123, 789);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: 19 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.31s
[INFO] running `"docker" "inspect" "255b1cdbb95fbff7afaa420f5a837666d5331dadba0c4c0f97f02ba446d326a7"`
[INFO] running `"docker" "rm" "-f" "255b1cdbb95fbff7afaa420f5a837666d5331dadba0c4c0f97f02ba446d326a7"`
[INFO] [stdout] 255b1cdbb95fbff7afaa420f5a837666d5331dadba0c4c0f97f02ba446d326a7
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "test" "--frozen"`
[INFO] [stdout] 42d9d7b8769b0febd1d3346e99513a4d006b1bd6ec60d19c574198381972fa88
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "42d9d7b8769b0febd1d3346e99513a4d006b1bd6ec60d19c574198381972fa88"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]  --> src/thread_demo/mod.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |     use super::*;
[INFO] [stderr]   |         ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Arc`, `Mutex`
[INFO] [stderr]    --> src/oop_demo/mod.rs:119:21
[INFO] [stderr]     |
[INFO] [stderr] 119 |     use std::sync::{Arc, Mutex};
[INFO] [stderr]     |                     ^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::sync::mpsc`
[INFO] [stderr]    --> src/oop_demo/mod.rs:120:9
[INFO] [stderr]     |
[INFO] [stderr] 120 |     use std::sync::mpsc;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::thread`
[INFO] [stderr]    --> src/oop_demo/mod.rs:121:9
[INFO] [stderr]     |
[INFO] [stderr] 121 |     use std::thread;
[INFO] [stderr]     |         ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::time::Duration`
[INFO] [stderr]    --> src/oop_demo/mod.rs:122:9
[INFO] [stderr]     |
[INFO] [stderr] 122 |     use std::time::Duration;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]   --> src/server_demo/mod.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     use super::*;
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::error::Error`
[INFO] [stderr]  --> src/thread_pool/mod.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::error::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::future::Future`
[INFO] [stderr]  --> src/thread_pool/mod.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::future::Future;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `z`
[INFO] [stderr]   --> src/deref/mod.rs:27:13
[INFO] [stderr]    |
[INFO] [stderr] 27 |         let z = MyBox::new(String::from("Rust"));
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/memory/mod.rs:33:13
[INFO] [stderr]    |
[INFO] [stderr] 33 |         let b = Cons(3, a.clone());
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]   --> src/memory/mod.rs:34:13
[INFO] [stderr]    |
[INFO] [stderr] 34 |         let c = Cons(4, Rc::clone(&a));
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/rc/mod.rs:55:13
[INFO] [stderr]    |
[INFO] [stderr] 55 |         let b = Cons(3, Rc::clone(&a));
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]   --> src/rc/mod.rs:58:17
[INFO] [stderr]    |
[INFO] [stderr] 58 |             let c = Cons(4, Rc::clone(&a));
[INFO] [stderr]    |                 ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `producer`
[INFO] [stderr]   --> src/thread_demo/mod.rs:49:13
[INFO] [stderr]    |
[INFO] [stderr] 49 |         let producer = thread::spawn(move || {
[INFO] [stderr]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_producer`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `post`
[INFO] [stderr]  --> src/oop_demo/mod.rs:9:27
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn content<'a>(&self, post: &'a Post) -> &'a str {
[INFO] [stderr]   |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_post`
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `value`
[INFO] [stderr]   --> src/cache/mod.rs:20:8
[INFO] [stderr]    |
[INFO] [stderr] 20 |     fn value<U>(&mut self, arg: U) -> &R
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `value2`
[INFO] [stderr]   --> src/cache/mod.rs:36:8
[INFO] [stderr]    |
[INFO] [stderr] 36 |     fn value2<U>(&mut self, arg: U) -> &R
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `id`
[INFO] [stderr]   --> src/thread_pool/mod.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     id: usize,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/print/mod.rs:88:9
[INFO] [stderr]    |
[INFO] [stderr] 88 |         writeln!(&mut some_writer, "{} - {}", 123, 789);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: 19 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::error::Error`
[INFO] [stderr]  --> src/thread_pool/mod.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::error::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::future::Future`
[INFO] [stderr]  --> src/thread_pool/mod.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::future::Future;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `self`
[INFO] [stderr]  --> src/print/mod.rs:2:15
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io::{self, Write};
[INFO] [stderr]   |               ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Write`
[INFO] [stderr]  --> src/print/mod.rs:2:21
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io::{self, Write};
[INFO] [stderr]   |                     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `post`
[INFO] [stderr]  --> src/oop_demo/mod.rs:9:27
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn content<'a>(&self, post: &'a Post) -> &'a str {
[INFO] [stderr]   |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_post`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Cacher`
[INFO] [stderr]  --> src/cache/mod.rs:5:8
[INFO] [stderr]   |
[INFO] [stderr] 5 | struct Cacher<T, R>
[INFO] [stderr]   |        ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/cache/mod.rs:12:8
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn new(calculation: T) -> Self {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `value`
[INFO] [stderr]   --> src/cache/mod.rs:20:8
[INFO] [stderr]    |
[INFO] [stderr] 20 |     fn value<U>(&mut self, arg: U) -> &R
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `value2`
[INFO] [stderr]   --> src/cache/mod.rs:36:8
[INFO] [stderr]    |
[INFO] [stderr] 36 |     fn value2<U>(&mut self, arg: U) -> &R
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `value3`
[INFO] [stderr]   --> src/cache/mod.rs:47:8
[INFO] [stderr]    |
[INFO] [stderr] 47 |     fn value3<U>(&mut self, arg: U) -> &R
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `is_some`
[INFO] [stderr]   --> src/cache/mod.rs:57:8
[INFO] [stderr]    |
[INFO] [stderr] 57 |     fn is_some(&self) -> bool {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `is_none`
[INFO] [stderr]   --> src/cache/mod.rs:64:8
[INFO] [stderr]    |
[INFO] [stderr] 64 |     fn is_none(&self) -> bool {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]  --> src/iterator/mod.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 |     fn new() -> Counter {
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]  --> src/deref/mod.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 |     fn new(x: T) -> MyBox<T> {
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `List`
[INFO] [stderr]  --> src/memory/mod.rs:4:6
[INFO] [stderr]   |
[INFO] [stderr] 4 | enum List {
[INFO] [stderr]   |      ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Cons`
[INFO] [stderr]   --> src/memory/mod.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     Cons(T, RefCell<Rc<ListMemoryLeak<T>>>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Nil`
[INFO] [stderr]   --> src/memory/mod.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     Nil,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `tail`
[INFO] [stderr]   --> src/memory/mod.rs:16:8
[INFO] [stderr]    |
[INFO] [stderr] 16 |     fn tail(&self) -> Option<&RefCell<Rc<ListMemoryLeak<T>>>> {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Cons`
[INFO] [stderr]  --> src/rc/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     Cons(T, &'a Box<ListRefVersion<'a, T>>),
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Nil`
[INFO] [stderr]  --> src/rc/mod.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     Nil,
[INFO] [stderr]   |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Cons`
[INFO] [stderr]   --> src/rc/mod.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     Cons(T, Rc<ListRcVersion<T>>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Nil`
[INFO] [stderr]   --> src/rc/mod.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     Nil,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Cons`
[INFO] [stderr]   --> src/rc/mod.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     Cons(Rc<RefCell<T>>, Rc<ListRcRefVersion<T>>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Nil`
[INFO] [stderr]   --> src/rc/mod.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     Nil,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `LimitTracker`
[INFO] [stderr]  --> src/ref_demo/mod.rs:5:12
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub struct LimitTracker<'a, T>
[INFO] [stderr]   |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/ref_demo/mod.rs:16:12
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn new(messenger: &'a T, max: usize) -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `set_value`
[INFO] [stderr]   --> src/ref_demo/mod.rs:24:12
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn set_value(&mut self, value: usize) {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/oop_demo/mod.rs:24:8
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn new() -> Self {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/oop_demo/mod.rs:88:8
[INFO] [stderr]    |
[INFO] [stderr] 88 |     fn new() -> Self {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `add_text`
[INFO] [stderr]   --> src/oop_demo/mod.rs:95:12
[INFO] [stderr]    |
[INFO] [stderr] 95 |     pub fn add_text(&mut self, text: &str) {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `content`
[INFO] [stderr]   --> src/oop_demo/mod.rs:99:12
[INFO] [stderr]    |
[INFO] [stderr] 99 |     pub fn content(&self) -> &str {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `request_review`
[INFO] [stderr]    --> src/oop_demo/mod.rs:103:12
[INFO] [stderr]     |
[INFO] [stderr] 103 |     pub fn request_review(&mut self) {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `approve`
[INFO] [stderr]    --> src/oop_demo/mod.rs:109:12
[INFO] [stderr]     |
[INFO] [stderr] 109 |     pub fn approve(&mut self) {
[INFO] [stderr]     |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `id`
[INFO] [stderr]   --> src/thread_pool/mod.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     id: usize,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 34 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::env`
[INFO] [stderr]  --> src/main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::env;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::process`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::process;
[INFO] [stderr]   |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.29s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/minigrep-2d9a8f2560b59f9e
[INFO] [stdout] 
[INFO] [stdout] running 23 tests
[INFO] [stdout] 123 - 789
[INFO] [stdout] test iterator::tests::calling_next_directly ... ok
[INFO] [stdout] test deref::tests::it_works ... ok
[INFO] [stdout] test iterator::tests::iterator_demonstration ... ok
[INFO] [stdout] test iterator::tests::iterator_sum ... ok
[INFO] [stdout] test oop_demo::tests::it_works ... ok
[INFO] [stdout] test memory::tests::it_works ... ok
[INFO] [stdout] test memory::tests::it_works2 ... ok
[INFO] [stdout] test iterator::tests::using_other_iterator_trait_methods ... ok
[INFO] [stdout] test print::tests::it_works ... ok
[INFO] [stdout] test rc::tests::test_list_rc_ref_version ... ok
[INFO] [stdout] test server_demo::tests::it_works ... ok
[INFO] [stdout] test search::tests::case_insensitive ... ok
[INFO] [stdout] test rc::tests::test_list_rc_version ... ok
[INFO] [stdout] test ref_demo::tests::it_sends_an_over_75_percent_warning_message ... ok
[INFO] [stdout] test rc::tests::test_list_ref_version ... ok
[INFO] [stdout] test search::tests::case_sensitive ... ok
[INFO] [stdout] test tree::tests::it_works ... ok
[INFO] [stdout] 将要发送的数据 : "hi"
[INFO] [stdout] 发送成功!
[INFO] [stdout] Here's a vector: [1, 2, 3]
[INFO] [stdout] test thread_demo::tests::it_works2 ... ok
[INFO] [stdout] hi number 1 from the spawned thread!
[INFO] [stdout] hi number 2 from the spawned thread!
[INFO] [stdout] hi number 3 from the spawned thread!
[INFO] [stdout] test thread_demo::tests::it_works_channel ... ok
[INFO] [stdout] Worker 1 got a job; executing.
[INFO] [stdout] Worker 0 got a job; executing.
[INFO] [stdout] hi number 4 from the spawned thread!
[INFO] [stdout] hi number 5 from the spawned thread!
[INFO] [stdout] hi number 6 from the spawned thread!
[INFO] [stdout] hi number 7 from the spawned thread!
[INFO] [stdout] hi number 8 from the spawned thread!
[INFO] [stdout] Worker 2 got a job; executing.
[INFO] [stdout] hi number 9 from the spawned thread!
[INFO] [stdout] test thread_demo::tests::it_works ... ok
[INFO] [stdout] test thread_demo::tests::it_works_mutex ... ok
[INFO] [stdout] test cache::tests::it_works ... ok
[INFO] [stdout] thread_pool.execute 0 got a job; executing.
[INFO] [stdout] Worker 1 got a job; executing.
[INFO] [stdout] thread_pool.execute 1 got a job; executing.
[INFO] [stdout] Worker 0 got a job; executing.
[INFO] [stdout] thread_pool.execute 2 got a job; executing.
[INFO] [stdout] Worker 2 got a job; executing.
[INFO] [stdout] thread_pool.execute 3 got a job; executing.
[INFO] [stdout] Worker 1 got a job; executing.
[INFO] [stdout] thread_pool.execute 4 got a job; executing.
[INFO] [stdout] Worker 0 was told to terminate.
[INFO] [stdout] thread_pool.execute 5 got a job; executing.
[INFO] [stdout] Worker 2 was told to terminate.
[INFO] [stdout] thread_pool.execute 6 got a job; executing.
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/minigrep-0282484096c90287
[INFO] [stdout] Worker 1 was told to terminate.
[INFO] [stderr]    Doc-tests minigrep
[INFO] [stdout] test thread_pool::tests::it_works ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 23 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "42d9d7b8769b0febd1d3346e99513a4d006b1bd6ec60d19c574198381972fa88"`
[INFO] running `"docker" "rm" "-f" "42d9d7b8769b0febd1d3346e99513a4d006b1bd6ec60d19c574198381972fa88"`
[INFO] [stdout] 42d9d7b8769b0febd1d3346e99513a4d006b1bd6ec60d19c574198381972fa88