[INFO] cloning repository https://github.com/lforeverhao/rust_learn
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lforeverhao/rust_learn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flforeverhao%2Frust_learn", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flforeverhao%2Frust_learn'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5c0fa028aa8343016f141e54ddace34b70347b38
[INFO] checking lforeverhao/rust_learn against try#45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4 for pr-83744
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flforeverhao%2Frust_learn" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lforeverhao/rust_learn on toolchain 45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/lforeverhao/rust_learn
[INFO] finished tweaking git repo https://github.com/lforeverhao/rust_learn
[INFO] tweaked toml for git repo https://github.com/lforeverhao/rust_learn written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/lforeverhao/rust_learn already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7701561ff402d28bd96c0e742a166198dd43cc717a092133b4692d82216de875
[INFO] running `Command { std: "docker" "start" "-a" "7701561ff402d28bd96c0e742a166198dd43cc717a092133b4692d82216de875", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7701561ff402d28bd96c0e742a166198dd43cc717a092133b4692d82216de875", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7701561ff402d28bd96c0e742a166198dd43cc717a092133b4692d82216de875", kill_on_drop: false }`
[INFO] [stdout] 7701561ff402d28bd96c0e742a166198dd43cc717a092133b4692d82216de875
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 051b594fe903a3948a4b83baeff834d8cd63c77a4172b702ad007988eb1b70fc
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "051b594fe903a3948a4b83baeff834d8cd63c77a4172b702ad007988eb1b70fc", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]     Checking try-lock v0.2.2
[INFO] [stderr]     Checking test_concurrent v0.1.0 (/opt/rustwide/workdir/test_concurrent)
[INFO] [stderr]     Checking test_lifetime v0.1.0 (/opt/rustwide/workdir/test_lifetime)
[INFO] [stderr]     Checking test_string v0.1.0 (/opt/rustwide/workdir/test_string)
[INFO] [stderr]     Checking test_borrow v0.1.0 (/opt/rustwide/workdir/test_borrow)
[INFO] [stdout] warning: unused import: `std::str::Chars`
[INFO] [stdout]  --> test_string/src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::str::Chars;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `longest1` in this scope
[INFO] [stdout]   --> test_lifetime/src/lib.rs:34:20
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
[INFO] [stdout]    | ------------------------------------------------- similarly named function `longest` defined here
[INFO] [stdout] ...
[INFO] [stdout] 34 |     let longest1 = longest1("1", "2");
[INFO] [stdout]    |                    ^^^^^^^^ help: a function with a similar name exists: `longest`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `showStr`
[INFO] [stdout]   --> test_string/src/main.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn showStr(s: &str) {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `showStr` should have a snake case name
[INFO] [stdout]   --> test_string/src/main.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn showStr(s: &str) {
[INFO] [stdout]    |    ^^^^^^^ help: convert the identifier to snake case: `show_str`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `test_lifetime`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused import: `std::sync::mpsc`
[INFO] [stdout]  --> test_concurrent/src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::sync::mpsc;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::sync::Arc`
[INFO] [stdout]  --> test_concurrent/src/thread_test.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::sync::Arc;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BorrowMut`, `Borrow`
[INFO] [stdout]  --> test_concurrent/src/mutex.rs:1:19
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::{Borrow, BorrowMut};
[INFO] [stdout]   |                   ^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Cell`, `RefCell`
[INFO] [stdout]  --> test_concurrent/src/arc.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cell::{Cell, RefCell};
[INFO] [stdout]   |                 ^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time::Duration`
[INFO] [stdout]  --> test_concurrent/src/atomic.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::time::Duration;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]  --> test_concurrent/src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::thread;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time::Duration`
[INFO] [stdout]  --> test_concurrent/src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::time::Duration;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::sync::mpsc`
[INFO] [stdout]  --> test_concurrent/src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::sync::mpsc;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::sync::Arc`
[INFO] [stdout]  --> test_concurrent/src/thread_test.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::sync::Arc;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BorrowMut`, `Borrow`
[INFO] [stdout]  --> test_concurrent/src/mutex.rs:1:19
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::{Borrow, BorrowMut};
[INFO] [stdout]   |                   ^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Cell`, `RefCell`
[INFO] [stdout]  --> test_concurrent/src/arc.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cell::{Cell, RefCell};
[INFO] [stdout]   |                 ^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time::Duration`
[INFO] [stdout]  --> test_concurrent/src/atomic.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::time::Duration;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> test_concurrent/src/channel.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |     for i in 0..10 {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> test_concurrent/src/channel.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |     for i in 0..10 {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `handle`
[INFO] [stdout]   --> test_concurrent/src/channel.rs:65:13
[INFO] [stdout]    |
[INFO] [stdout] 65 |         let handle = thread::spawn(move || {
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_handle`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> test_concurrent/src/channel.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 72 |     for x in receiver {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> test_concurrent/src/mutex.rs:10:13
[INFO] [stdout]    |
[INFO] [stdout] 10 |         for i in 0..COUNT {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> test_concurrent/src/mutex.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 |         for i in 0..COUNT {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> test_concurrent/src/mutex.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |         for i in 0..COUNT {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]  --> test_concurrent/src/arc.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     for index in 0..10 {
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> test_concurrent/src/atomic.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |         for x in 0..COUNT {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> test_concurrent/src/atomic.rs:19:13
[INFO] [stdout]    |
[INFO] [stdout] 19 |         for x in 0..COUNT {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> test_concurrent/src/atomic.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |         for x in 0..COUNT {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `handle`
[INFO] [stdout]   --> test_concurrent/src/channel.rs:65:13
[INFO] [stdout]    |
[INFO] [stdout] 65 |         let handle = thread::spawn(move || {
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_handle`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> test_concurrent/src/channel.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 72 |     for x in receiver {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> test_concurrent/src/mutex.rs:10:13
[INFO] [stdout]    |
[INFO] [stdout] 10 |         for i in 0..COUNT {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> test_concurrent/src/mutex.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 |         for i in 0..COUNT {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> test_concurrent/src/mutex.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |         for i in 0..COUNT {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]  --> test_concurrent/src/arc.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     for index in 0..10 {
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> test_concurrent/src/atomic.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |         for x in 0..COUNT {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> test_concurrent/src/atomic.rs:19:13
[INFO] [stdout]    |
[INFO] [stdout] 19 |         for x in 0..COUNT {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> test_concurrent/src/atomic.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |         for x in 0..COUNT {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run_sync_channel`
[INFO] [stdout]  --> test_concurrent/src/channel.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn run_sync_channel() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run_async_channel`
[INFO] [stdout]   --> test_concurrent/src/channel.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn run_async_channel() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `multi_sender_one_receiver`
[INFO] [stdout]   --> test_concurrent/src/channel.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub fn multi_sender_one_receiver() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `create_thread`
[INFO] [stdout]  --> test_concurrent/src/thread_test.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn create_thread() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `park_thread`
[INFO] [stdout]   --> test_concurrent/src/thread_test.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn park_thread() {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `create_thread_move`
[INFO] [stdout]   --> test_concurrent/src/thread_test.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub fn create_thread_move() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `create_thread_no_move`
[INFO] [stdout]   --> test_concurrent/src/thread_test.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub fn create_thread_no_move() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `mutex_test`
[INFO] [stdout]  --> test_concurrent/src/mutex.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn mutex_test() {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `arc_cross_thread`
[INFO] [stdout]  --> test_concurrent/src/arc.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn arc_cross_thread() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `arc_one_write_multi_read`
[INFO] [stdout]   --> test_concurrent/src/arc.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn arc_one_write_multi_read() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `atomic_test`
[INFO] [stdout]  --> test_concurrent/src/atomic.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn atomic_test() {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> test_concurrent/src/thread_test.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     handle.join();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> test_concurrent/src/thread_test.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     handle.join();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `arcClone` should have a snake case name
[INFO] [stdout]  --> test_concurrent/src/mutex.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let arcClone = arc.clone();
[INFO] [stdout]   |         ^^^^^^^^ help: convert the identifier to snake case: `arc_clone`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `arcClone1` should have a snake case name
[INFO] [stdout]   --> test_concurrent/src/mutex.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let arcClone1 = arc.clone();
[INFO] [stdout]    |         ^^^^^^^^^ help: convert the identifier to snake case: `arc_clone1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `arcClone2` should have a snake case name
[INFO] [stdout]   --> test_concurrent/src/mutex.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let arcClone2 = arc.clone();
[INFO] [stdout]    |         ^^^^^^^^^ help: convert the identifier to snake case: `arc_clone2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> test_concurrent/src/mutex.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     handle.join();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> test_concurrent/src/mutex.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     handle1.join();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> test_concurrent/src/mutex.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     handle2.join();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> test_concurrent/src/atomic.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     thread.join();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> test_concurrent/src/atomic.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     thread1.join();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> test_concurrent/src/atomic.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     thread2.join();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 26 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> test_concurrent/src/thread_test.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     handle.join();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> test_concurrent/src/thread_test.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     handle.join();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `arcClone` should have a snake case name
[INFO] [stdout]  --> test_concurrent/src/mutex.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let arcClone = arc.clone();
[INFO] [stdout]   |         ^^^^^^^^ help: convert the identifier to snake case: `arc_clone`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `arcClone1` should have a snake case name
[INFO] [stdout]   --> test_concurrent/src/mutex.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let arcClone1 = arc.clone();
[INFO] [stdout]    |         ^^^^^^^^^ help: convert the identifier to snake case: `arc_clone1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `arcClone2` should have a snake case name
[INFO] [stdout]   --> test_concurrent/src/mutex.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let arcClone2 = arc.clone();
[INFO] [stdout]    |         ^^^^^^^^^ help: convert the identifier to snake case: `arc_clone2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> test_concurrent/src/mutex.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     handle.join();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> test_concurrent/src/mutex.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     handle1.join();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> test_concurrent/src/mutex.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     handle2.join();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> test_concurrent/src/atomic.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     thread.join();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> test_concurrent/src/atomic.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     thread1.join();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> test_concurrent/src/atomic.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     thread2.join();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 39 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "051b594fe903a3948a4b83baeff834d8cd63c77a4172b702ad007988eb1b70fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "051b594fe903a3948a4b83baeff834d8cd63c77a4172b702ad007988eb1b70fc", kill_on_drop: false }`
[INFO] [stdout] 051b594fe903a3948a4b83baeff834d8cd63c77a4172b702ad007988eb1b70fc