[INFO] cloning repository https://github.com/MwlLj/rust-pool
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MwlLj/rust-pool" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMwlLj%2Frust-pool", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMwlLj%2Frust-pool'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c85127efbf1d85f740ace63f803d5ef516de58c5
[INFO] testing MwlLj/rust-pool against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMwlLj%2Frust-pool" "/workspace/builds/worker-21/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-21/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MwlLj/rust-pool on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/MwlLj/rust-pool
[INFO] finished tweaking git repo https://github.com/MwlLj/rust-pool
[INFO] tweaked toml for git repo https://github.com/MwlLj/rust-pool written to /workspace/builds/worker-21/source/Cargo.toml
[INFO] crate git repo https://github.com/MwlLj/rust-pool already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--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-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 32cffd0c765101ad55675f7e816b0a01da77bc69f586a65e7e94cd84114c56bf
[INFO] running `Command { std: "docker" "start" "-a" "32cffd0c765101ad55675f7e816b0a01da77bc69f586a65e7e94cd84114c56bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "32cffd0c765101ad55675f7e816b0a01da77bc69f586a65e7e94cd84114c56bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32cffd0c765101ad55675f7e816b0a01da77bc69f586a65e7e94cd84114c56bf", kill_on_drop: false }`
[INFO] [stdout] 32cffd0c765101ad55675f7e816b0a01da77bc69f586a65e7e94cd84114c56bf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 43fbe7e3710515ecef2fd108c9c7c0dd86919ed0072e1e47704698bd0364cee2
[INFO] running `Command { std: "docker" "start" "-a" "43fbe7e3710515ecef2fd108c9c7c0dd86919ed0072e1e47704698bd0364cee2", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_pool v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::io::prelude::*`
[INFO] [stdout]  --> src/thread/simple/mod.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::sync`
[INFO] [stdout]  --> src/thread/mapping/mod.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::sync;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/thread/simple/mod.rs:18:17
[INFO] [stdout]    |
[INFO] [stdout] 18 | type CJob = Box<IFnBox + Send + 'static>;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 18 - type CJob = Box<IFnBox + Send + 'static>;
[INFO] [stdout] 18 + type CJob = Box<dyn IFnBox + Send + 'static>;
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `obj`
[INFO] [stdout]   --> src/thread/mapping/mod.rs:45:17
[INFO] [stdout]    |
[INFO] [stdout] 45 |             let obj = notFoundCb();
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_obj`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `handler`
[INFO] [stdout]   --> src/thread/simple/mod.rs:21:2
[INFO] [stdout]    |
[INFO] [stdout] 21 |     handler: thread::JoinHandle<()>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `threadNo`
[INFO] [stdout]   --> src/thread/simple/mod.rs:22:2
[INFO] [stdout]    |
[INFO] [stdout] 22 |     threadNo: usize
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `workers`
[INFO] [stdout]   --> src/thread/simple/mod.rs:51:2
[INFO] [stdout]    |
[INFO] [stdout] 51 |     workers: Vec<CWorker>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `CThread`
[INFO] [stdout]   --> src/thread/mapping/mod.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct CThread {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `CThreadPool`
[INFO] [stdout]   --> src/thread/mapping/mod.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct CThreadPool {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `execute`
[INFO] [stdout]   --> src/thread/mapping/mod.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn execute<NC, F, T>(&mut self, key: &str, notFoundCb: NC, callback: F)
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/thread/mapping/mod.rs:71:12
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub fn new() -> CThreadPool {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `threadNo` should have a snake case name
[INFO] [stdout]   --> src/thread/simple/mod.rs:22:2
[INFO] [stdout]    |
[INFO] [stdout] 22 |     threadNo: usize
[INFO] [stdout]    |     ^^^^^^^^ help: convert the identifier to snake case: `thread_no`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `threadNo` should have a snake case name
[INFO] [stdout]   --> src/thread/simple/mod.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     fn new(threadNo: usize, receiver: Arc<Mutex<mpsc::Receiver<CJob>>>) -> CWorker {
[INFO] [stdout]    |            ^^^^^^^^ help: convert the identifier to snake case: `thread_no`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `threadPool` should have a snake case name
[INFO] [stdout]   --> src/thread/simple/mod.rs:69:7
[INFO] [stdout]    |
[INFO] [stdout] 69 |         let threadPool = CThreadPool {
[INFO] [stdout]    |             ^^^^^^^^^^ help: convert the identifier to snake case: `thread_pool`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/thread/simple/mod.rs:79:3
[INFO] [stdout]    |
[INFO] [stdout] 79 |         self.sender.send(Box::new(f));
[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: variable `notFoundCb` should have a snake case name
[INFO] [stdout]   --> src/thread/mapping/mod.rs:29:52
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn execute<NC, F, T>(&mut self, key: &str, notFoundCb: NC, callback: F)
[INFO] [stdout]    |                                                    ^^^^^^^^^^ help: convert the identifier to snake case: `not_found_cb`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/thread/mapping/mod.rs:38:13
[INFO] [stdout]    |
[INFO] [stdout] 38 |             t.sender.send(Box::new(callback));
[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]   --> src/thread/mapping/mod.rs:62:17
[INFO] [stdout]    |
[INFO] [stdout] 62 |                 t.sender.send(Box::new(callback));
[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: 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `Command { std: "docker" "inspect" "43fbe7e3710515ecef2fd108c9c7c0dd86919ed0072e1e47704698bd0364cee2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43fbe7e3710515ecef2fd108c9c7c0dd86919ed0072e1e47704698bd0364cee2", kill_on_drop: false }`
[INFO] [stdout] 43fbe7e3710515ecef2fd108c9c7c0dd86919ed0072e1e47704698bd0364cee2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 867eb42bc51642b2b719d2437cfc46dc5f7427b79c54d9b6944dafd2767f765e
[INFO] running `Command { std: "docker" "start" "-a" "867eb42bc51642b2b719d2437cfc46dc5f7427b79c54d9b6944dafd2767f765e", kill_on_drop: false }`
[INFO] [stdout] warning: unused import: `std::io::prelude::*`
[INFO] [stdout]  --> src/thread/simple/mod.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::sync`
[INFO] [stdout]  --> src/thread/mapping/mod.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::sync;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/thread/simple/mod.rs:18:17
[INFO] [stdout]    |
[INFO] [stdout] 18 | type CJob = Box<IFnBox + Send + 'static>;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 18 - type CJob = Box<IFnBox + Send + 'static>;
[INFO] [stdout] 18 + type CJob = Box<dyn IFnBox + Send + 'static>;
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `obj`
[INFO] [stdout]   --> src/thread/mapping/mod.rs:45:17
[INFO] [stdout]    |
[INFO] [stdout] 45 |             let obj = notFoundCb();
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_obj`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `handler`
[INFO] [stdout]   --> src/thread/simple/mod.rs:21:2
[INFO] [stdout]    |
[INFO] [stdout] 21 |     handler: thread::JoinHandle<()>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `threadNo`
[INFO] [stdout]   --> src/thread/simple/mod.rs:22:2
[INFO] [stdout]    |
[INFO] [stdout] 22 |     threadNo: usize
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `workers`
[INFO] [stdout]   --> src/thread/simple/mod.rs:51:2
[INFO] [stdout]    |
[INFO] [stdout] 51 |     workers: Vec<CWorker>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `CThread`
[INFO] [stdout]   --> src/thread/mapping/mod.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct CThread {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `CThreadPool`
[INFO] [stdout]   --> src/thread/mapping/mod.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct CThreadPool {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `execute`
[INFO] [stdout]   --> src/thread/mapping/mod.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn execute<NC, F, T>(&mut self, key: &str, notFoundCb: NC, callback: F)
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/thread/mapping/mod.rs:71:12
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub fn new() -> CThreadPool {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `threadNo` should have a snake case name
[INFO] [stdout]   --> src/thread/simple/mod.rs:22:2
[INFO] [stdout]    |
[INFO] [stdout] 22 |     threadNo: usize
[INFO] [stdout]    |     ^^^^^^^^ help: convert the identifier to snake case: `thread_no`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `threadNo` should have a snake case name
[INFO] [stdout]   --> src/thread/simple/mod.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     fn new(threadNo: usize, receiver: Arc<Mutex<mpsc::Receiver<CJob>>>) -> CWorker {
[INFO] [stdout]    |            ^^^^^^^^ help: convert the identifier to snake case: `thread_no`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rust_pool v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable `threadPool` should have a snake case name
[INFO] [stdout]   --> src/thread/simple/mod.rs:69:7
[INFO] [stdout]    |
[INFO] [stdout] 69 |         let threadPool = CThreadPool {
[INFO] [stdout]    |             ^^^^^^^^^^ help: convert the identifier to snake case: `thread_pool`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/thread/simple/mod.rs:79:3
[INFO] [stdout]    |
[INFO] [stdout] 79 |         self.sender.send(Box::new(f));
[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: variable `notFoundCb` should have a snake case name
[INFO] [stdout]   --> src/thread/mapping/mod.rs:29:52
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn execute<NC, F, T>(&mut self, key: &str, notFoundCb: NC, callback: F)
[INFO] [stdout]    |                                                    ^^^^^^^^^^ help: convert the identifier to snake case: `not_found_cb`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/thread/mapping/mod.rs:38:13
[INFO] [stdout]    |
[INFO] [stdout] 38 |             t.sender.send(Box::new(callback));
[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]   --> src/thread/mapping/mod.rs:62:17
[INFO] [stdout]    |
[INFO] [stdout] 62 |                 t.sender.send(Box::new(callback));
[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: 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::prelude::*`
[INFO] [stdout]  --> src/thread/simple/mod.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::sync`
[INFO] [stdout]  --> src/thread/mapping/mod.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::sync;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/thread/simple/mod.rs:18:17
[INFO] [stdout]    |
[INFO] [stdout] 18 | type CJob = Box<IFnBox + Send + 'static>;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 18 - type CJob = Box<IFnBox + Send + 'static>;
[INFO] [stdout] 18 + type CJob = Box<dyn IFnBox + Send + 'static>;
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `obj`
[INFO] [stdout]   --> src/thread/mapping/mod.rs:45:17
[INFO] [stdout]    |
[INFO] [stdout] 45 |             let obj = notFoundCb();
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_obj`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `handler`
[INFO] [stdout]   --> src/thread/simple/mod.rs:21:2
[INFO] [stdout]    |
[INFO] [stdout] 21 |     handler: thread::JoinHandle<()>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `threadNo`
[INFO] [stdout]   --> src/thread/simple/mod.rs:22:2
[INFO] [stdout]    |
[INFO] [stdout] 22 |     threadNo: usize
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `workers`
[INFO] [stdout]   --> src/thread/simple/mod.rs:51:2
[INFO] [stdout]    |
[INFO] [stdout] 51 |     workers: Vec<CWorker>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `CThread`
[INFO] [stdout]   --> src/thread/mapping/mod.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct CThread {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `CThreadPool`
[INFO] [stdout]   --> src/thread/mapping/mod.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct CThreadPool {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `execute`
[INFO] [stdout]   --> src/thread/mapping/mod.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn execute<NC, F, T>(&mut self, key: &str, notFoundCb: NC, callback: F)
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/thread/mapping/mod.rs:71:12
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub fn new() -> CThreadPool {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `threadNo` should have a snake case name
[INFO] [stdout]   --> src/thread/simple/mod.rs:22:2
[INFO] [stdout]    |
[INFO] [stdout] 22 |     threadNo: usize
[INFO] [stdout]    |     ^^^^^^^^ help: convert the identifier to snake case: `thread_no`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `threadNo` should have a snake case name
[INFO] [stdout]   --> src/thread/simple/mod.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     fn new(threadNo: usize, receiver: Arc<Mutex<mpsc::Receiver<CJob>>>) -> CWorker {
[INFO] [stdout]    |            ^^^^^^^^ help: convert the identifier to snake case: `thread_no`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `threadPool` should have a snake case name
[INFO] [stdout]   --> src/thread/simple/mod.rs:69:7
[INFO] [stdout]    |
[INFO] [stdout] 69 |         let threadPool = CThreadPool {
[INFO] [stdout]    |             ^^^^^^^^^^ help: convert the identifier to snake case: `thread_pool`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/thread/simple/mod.rs:79:3
[INFO] [stdout]    |
[INFO] [stdout] 79 |         self.sender.send(Box::new(f));
[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: variable `notFoundCb` should have a snake case name
[INFO] [stdout]   --> src/thread/mapping/mod.rs:29:52
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn execute<NC, F, T>(&mut self, key: &str, notFoundCb: NC, callback: F)
[INFO] [stdout]    |                                                    ^^^^^^^^^^ help: convert the identifier to snake case: `not_found_cb`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/thread/mapping/mod.rs:38:13
[INFO] [stdout]    |
[INFO] [stdout] 38 |             t.sender.send(Box::new(callback));
[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]   --> src/thread/mapping/mod.rs:62:17
[INFO] [stdout]    |
[INFO] [stdout] 62 |                 t.sender.send(Box::new(callback));
[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: 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.78s
[INFO] [stderr]   Executable unittests src/lib.rs (/opt/rustwide/target/debug/deps/rust_pool-d30b8881ca12c084)
[INFO] running `Command { std: "docker" "inspect" "867eb42bc51642b2b719d2437cfc46dc5f7427b79c54d9b6944dafd2767f765e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "867eb42bc51642b2b719d2437cfc46dc5f7427b79c54d9b6944dafd2767f765e", kill_on_drop: false }`
[INFO] [stdout] 867eb42bc51642b2b719d2437cfc46dc5f7427b79c54d9b6944dafd2767f765e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7211a1bbb315a5661def22fbf101abb3136faa3998eddbfcc492f3aa289c0061
[INFO] running `Command { std: "docker" "start" "-a" "7211a1bbb315a5661def22fbf101abb3136faa3998eddbfcc492f3aa289c0061", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `std::io::prelude::*`
[INFO] [stderr]  --> src/thread/simple/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::io::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::sync`
[INFO] [stderr]  --> src/thread/mapping/mod.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::sync;
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/thread/simple/mod.rs:18:17
[INFO] [stderr]    |
[INFO] [stderr] 18 | type CJob = Box<IFnBox + Send + 'static>;
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 18 - type CJob = Box<IFnBox + Send + 'static>;
[INFO] [stderr] 18 + type CJob = Box<dyn IFnBox + Send + 'static>;
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `obj`
[INFO] [stderr]   --> src/thread/mapping/mod.rs:45:17
[INFO] [stderr]    |
[INFO] [stderr] 45 |             let obj = notFoundCb();
[INFO] [stderr]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_obj`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `handler`
[INFO] [stderr]   --> src/thread/simple/mod.rs:21:2
[INFO] [stderr]    |
[INFO] [stderr] 21 |     handler: thread::JoinHandle<()>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `threadNo`
[INFO] [stderr]   --> src/thread/simple/mod.rs:22:2
[INFO] [stderr]    |
[INFO] [stderr] 22 |     threadNo: usize
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `workers`
[INFO] [stderr]   --> src/thread/simple/mod.rs:51:2
[INFO] [stderr]    |
[INFO] [stderr] 51 |     workers: Vec<CWorker>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `CThread`
[INFO] [stderr]   --> src/thread/mapping/mod.rs:19:8
[INFO] [stderr]    |
[INFO] [stderr] 19 | struct CThread {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `CThreadPool`
[INFO] [stderr]   --> src/thread/mapping/mod.rs:24:8
[INFO] [stderr]    |
[INFO] [stderr] 24 | struct CThreadPool {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `execute`
[INFO] [stderr]   --> src/thread/mapping/mod.rs:29:12
[INFO] [stderr]    |
[INFO] [stderr] 29 |     pub fn execute<NC, F, T>(&mut self, key: &str, notFoundCb: NC, callback: F)
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/thread/mapping/mod.rs:71:12
[INFO] [stderr]    |
[INFO] [stderr] 71 |     pub fn new() -> CThreadPool {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: structure field `threadNo` should have a snake case name
[INFO] [stderr]   --> src/thread/simple/mod.rs:22:2
[INFO] [stderr]    |
[INFO] [stderr] 22 |     threadNo: usize
[INFO] [stderr]    |     ^^^^^^^^ help: convert the identifier to snake case: `thread_no`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `threadNo` should have a snake case name
[INFO] [stderr]   --> src/thread/simple/mod.rs:26:9
[INFO] [stderr]    |
[INFO] [stderr] 26 |     fn new(threadNo: usize, receiver: Arc<Mutex<mpsc::Receiver<CJob>>>) -> CWorker {
[INFO] [stderr]    |            ^^^^^^^^ help: convert the identifier to snake case: `thread_no`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `threadPool` should have a snake case name
[INFO] [stderr]   --> src/thread/simple/mod.rs:69:7
[INFO] [stderr]    |
[INFO] [stderr] 69 |         let threadPool = CThreadPool {
[INFO] [stderr]    |             ^^^^^^^^^^ help: convert the identifier to snake case: `thread_pool`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/thread/simple/mod.rs:79:3
[INFO] [stderr]    |
[INFO] [stderr] 79 |         self.sender.send(Box::new(f));
[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] 
[INFO] [stderr] warning: variable `notFoundCb` should have a snake case name
[INFO] [stderr]   --> src/thread/mapping/mod.rs:29:52
[INFO] [stderr]    |
[INFO] [stderr] 29 |     pub fn execute<NC, F, T>(&mut self, key: &str, notFoundCb: NC, callback: F)
[INFO] [stderr]    |                                                    ^^^^^^^^^^ help: convert the identifier to snake case: `not_found_cb`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/thread/mapping/mod.rs:38:13
[INFO] [stderr]    |
[INFO] [stderr] 38 |             t.sender.send(Box::new(callback));
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/thread/mapping/mod.rs:62:17
[INFO] [stderr]    |
[INFO] [stderr] 62 |                 t.sender.send(Box::new(callback));
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_pool` (lib) generated 18 warnings
[INFO] [stderr] warning: `rust_pool` (lib test) generated 18 warnings (18 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rust_pool-d30b8881ca12c084)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rust_pool
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "7211a1bbb315a5661def22fbf101abb3136faa3998eddbfcc492f3aa289c0061", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7211a1bbb315a5661def22fbf101abb3136faa3998eddbfcc492f3aa289c0061", kill_on_drop: false }`
[INFO] [stdout] 7211a1bbb315a5661def22fbf101abb3136faa3998eddbfcc492f3aa289c0061