[INFO] cloning repository https://github.com/ratnadeepb/Rust_async_demos
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ratnadeepb/Rust_async_demos" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fratnadeepb%2FRust_async_demos", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fratnadeepb%2FRust_async_demos'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c898ae6b6f0ac04d77990c142ce7fcd16f339d85
[INFO] checking ratnadeepb/Rust_async_demos against try#8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8 for pr-82565
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fratnadeepb%2FRust_async_demos" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ratnadeepb/Rust_async_demos on toolchain 8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ratnadeepb/Rust_async_demos
[INFO] finished tweaking git repo https://github.com/ratnadeepb/Rust_async_demos
[INFO] tweaked toml for git repo https://github.com/ratnadeepb/Rust_async_demos written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/ratnadeepb/Rust_async_demos already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: /workspace/builds/worker-5/source/tokio-oneshot-joinhandle/Cargo.toml: unused manifest key: dependencies.tokio.feature
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Updating git repository `https://github.com/sergey-melnychuk/rust-parser-combinators`
[INFO] [stderr] error: the lock file /workspace/builds/worker-5/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/sergey-melnychuk/rust-parser-combinators`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: /workspace/builds/worker-5/source/tokio-oneshot-joinhandle/Cargo.toml: unused manifest key: dependencies.tokio.feature
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tokio-macros v0.3.2
[INFO] [stderr]   Downloaded tokio v0.3.7
[INFO] running `Command { std: "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" "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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5d5dfdeb9c08eac50a5e1cc6be6af16b4306c351137cc799cb7a1d40af960332
[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" "5d5dfdeb9c08eac50a5e1cc6be6af16b4306c351137cc799cb7a1d40af960332", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5d5dfdeb9c08eac50a5e1cc6be6af16b4306c351137cc799cb7a1d40af960332", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d5dfdeb9c08eac50a5e1cc6be6af16b4306c351137cc799cb7a1d40af960332", kill_on_drop: false }`
[INFO] [stdout] 5d5dfdeb9c08eac50a5e1cc6be6af16b4306c351137cc799cb7a1d40af960332
[INFO] running `Command { std: "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" "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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 08618f942524ff00e6cc268da2c9093a5786d6d674a37dd99a7cd2eaa33c4fdc
[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" "08618f942524ff00e6cc268da2c9093a5786d6d674a37dd99a7cd2eaa33c4fdc", kill_on_drop: false }`
[INFO] [stderr] warning: /opt/rustwide/workdir/tokio-oneshot-joinhandle/Cargo.toml: unused manifest key: dependencies.tokio.feature
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking futures-sink v0.3.13
[INFO] [stderr]     Checking adler32 v1.2.0
[INFO] [stderr]     Checking weezl v0.1.4
[INFO] [stderr]     Checking color_quant v1.1.0
[INFO] [stderr]     Checking bytemuck v1.5.1
[INFO] [stderr]     Checking cpuid-bool v0.1.2
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking opaque-debug v0.3.0
[INFO] [stderr]     Checking base64 v0.13.0
[INFO] [stderr]     Checking parser-combinators v0.1.0 (https://github.com/sergey-melnychuk/rust-parser-combinators?tag=0.1.3#9f87600d)
[INFO] [stderr]     Checking parser-combinator v0.1.0 (/opt/rustwide/workdir/parser-combinator)
[INFO] [stderr]     Checking thread-demo v0.1.0 (/opt/rustwide/workdir/thread-demo)
[INFO] [stderr]     Checking timer v0.1.0 (/opt/rustwide/workdir/timer)
[INFO] [stderr]    Compiling crossbeam-utils v0.8.3
[INFO] [stdout] warning: function is never used: `the_letter_a`
[INFO] [stdout]   --> parser-combinator/src/lib.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn the_letter_a(input: &str) -> Result<(&str, ()), &str> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling memoffset v0.6.1
[INFO] [stdout] warning: unused variable: `handle1`
[INFO] [stdout]   --> thread-demo/src/main.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let handle1 = thread::spawn(move || {
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_handle1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling tokio v0.3.7
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stdout] warning: unused variable: `handle1`
[INFO] [stdout]   --> thread-demo/src/main.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let handle1 = thread::spawn(move || {
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_handle1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling num-bigint v0.3.2
[INFO] [stderr]    Compiling num-rational v0.3.2
[INFO] [stdout] warning: function is never used: `the_letter_a`
[INFO] [stdout]   --> parser-combinator/src/lib.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn the_letter_a(input: &str) -> Result<(&str, ()), &str> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]     Checking lock_api v0.4.2
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]     Checking miniz_oxide v0.3.7
[INFO] [stderr]     Checking deflate v0.8.6
[INFO] [stderr]     Checking futures-channel v0.3.13
[INFO] [stderr]     Checking crc32fast v1.2.1
[INFO] [stderr]     Checking gif v0.11.1
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking signal-hook-registry v1.3.0
[INFO] [stderr]     Checking socket2 v0.3.19
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking futures-lite v1.11.3
[INFO] [stderr]     Checking regex v1.4.5
[INFO] [stderr]     Checking sha-1 v0.9.4
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]    Compiling syn v1.0.64
[INFO] [stderr]     Checking nb-connect v1.0.3
[INFO] [stderr]     Checking png v0.16.8
[INFO] [stderr]     Checking crossbeam-epoch v0.9.3
[INFO] [stderr]     Checking crossbeam-channel v0.5.0
[INFO] [stderr]     Checking crossbeam-queue v0.3.1
[INFO] [stderr]     Checking backtrace v0.3.56
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]     Checking async-executor v1.4.0
[INFO] [stderr]     Checking rayon-core v1.9.0
[INFO] [stderr]     Checking crossbeam v0.8.0
[INFO] [stderr]     Checking num-complex v0.3.1
[INFO] [stderr]     Checking crossbeam-parallel-pipeline v0.1.0 (/opt/rustwide/workdir/crossbeam-parallel-pipeline)
[INFO] [stderr]     Checking num v0.3.1
[INFO] [stderr]     Checking jpeg-decoder v0.1.22
[INFO] [stderr]     Checking rayon-crossbeam-demo v0.1.0 (/opt/rustwide/workdir/rayon-crossbeam-demo)
[INFO] [stderr]     Checking tiff v0.6.1
[INFO] [stderr]    Compiling ctor v0.1.19
[INFO] [stderr]    Compiling tokio-macros v0.3.2
[INFO] [stderr]    Compiling futures-macro v0.3.13
[INFO] [stderr]     Checking image v0.23.14
[INFO] [stderr]     Checking value-bag v1.0.0-alpha.6
[INFO] [stderr]     Checking futures-util v0.3.13
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking mio v0.7.10
[INFO] [stderr]     Checking polling v2.0.2
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking env_logger v0.8.3
[INFO] [stderr]     Checking async-io v1.3.1
[INFO] [stderr]     Checking testing-mio v0.1.0 (/opt/rustwide/workdir/testing-mio)
[INFO] [stderr]     Checking multi-threaded-http v0.1.0 (/opt/rustwide/workdir/multi-threaded-http)
[INFO] [stderr]     Checking mio-http v0.1.0 (/opt/rustwide/workdir/mio-http)
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> multi-threaded-http/src/pool.rs:6:11
[INFO] [stdout]   |
[INFO] [stdout] 6 |     thread::{self, JoinHandle},
[INFO] [stdout]   |              ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `log::debug`
[INFO] [stdout]  --> multi-threaded-http/src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use log::debug;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Events`, `Interest`, `Poll`, `TcpListener`
[INFO] [stdout]  --> multi-threaded-http/src/main.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 |     net::{TcpListener, TcpStream},
[INFO] [stdout]   |           ^^^^^^^^^^^
[INFO] [stdout] 6 |     Events, Interest, Poll, Token,
[INFO] [stdout]   |     ^^^^^^  ^^^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `as_string`, `parse_http_request`
[INFO] [stdout]  --> multi-threaded-http/src/main.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |     http::{as_string, parse_http_request, Header, Request, Response},
[INFO] [stdout]   |            ^^^^^^^^^  ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `pool::ThreadPool`
[INFO] [stdout]   --> multi-threaded-http/src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use pool::ThreadPool;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Read`, `Write`, `collections::HashMap`
[INFO] [stdout]   --> multi-threaded-http/src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     collections::HashMap,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 16 |     io::{Read, Write},
[INFO] [stdout]    |          ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> multi-threaded-http/src/pool.rs:6:11
[INFO] [stdout]   |
[INFO] [stdout] 6 |     thread::{self, JoinHandle},
[INFO] [stdout]   |              ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `log::debug`
[INFO] [stdout]  --> multi-threaded-http/src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use log::debug;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Events`, `Interest`, `Poll`, `TcpListener`
[INFO] [stdout]  --> multi-threaded-http/src/main.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 |     net::{TcpListener, TcpStream},
[INFO] [stdout]   |           ^^^^^^^^^^^
[INFO] [stdout] 6 |     Events, Interest, Poll, Token,
[INFO] [stdout]   |     ^^^^^^  ^^^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `as_string`, `parse_http_request`
[INFO] [stdout]  --> multi-threaded-http/src/main.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |     http::{as_string, parse_http_request, Header, Request, Response},
[INFO] [stdout]   |            ^^^^^^^^^  ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `pool::ThreadPool`
[INFO] [stdout]   --> multi-threaded-http/src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use pool::ThreadPool;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Read`, `Write`, `collections::HashMap`
[INFO] [stdout]   --> multi-threaded-http/src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     collections::HashMap,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 16 |     io::{Read, Write},
[INFO] [stdout]    |          ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> multi-threaded-http/src/main.rs:33:29
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn handler(req: Request) -> Response {
[INFO] [stdout]    |    -------                  ^^^^^^^^ expected struct `Response`, found `()`
[INFO] [stdout]    |    |
[INFO] [stdout]    |    implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> multi-threaded-http/src/pool.rs:57:21
[INFO] [stdout]    |
[INFO] [stdout] 15 |     Task(Runnable),
[INFO] [stdout]    |     -------------- fn(Box<(dyn FnOnce() + Send + 'static)>) -> Job {Job::Task} defined here
[INFO] [stdout] ...
[INFO] [stdout] 57 |             self.sender.send(Job::Task).unwrap(); // sending Stop to all threads in the pool
[INFO] [stdout]    |                              ^^^^^^^^^ expected enum `Job`, found fn item
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected enum `Job`
[INFO] [stdout]            found fn item `fn(Box<(dyn FnOnce() + Send + 'static)>) -> Job {Job::Task}`
[INFO] [stdout] help: use parentheses to instantiate this tuple variant
[INFO] [stdout]    |
[INFO] [stdout] 57 |             self.sender.send(Job::Task(_)).unwrap(); // sending Stop to all threads in the pool
[INFO] [stdout]    |                                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> multi-threaded-http/src/main.rs:33:29
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn handler(req: Request) -> Response {
[INFO] [stdout]    |    -------                  ^^^^^^^^ expected struct `Response`, found `()`
[INFO] [stdout]    |    |
[INFO] [stdout]    |    implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `multi-threaded-http`
[INFO] [stderr] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> multi-threaded-http/src/pool.rs:57:21
[INFO] [stdout]    |
[INFO] [stdout] 15 |     Task(Runnable),
[INFO] [stdout]    |     -------------- fn(Box<(dyn FnOnce() + Send + 'static)>) -> Job {Job::Task} defined here
[INFO] [stdout] ...
[INFO] [stdout] 57 |             self.sender.send(Job::Task).unwrap(); // sending Stop to all threads in the pool
[INFO] [stdout]    |                              ^^^^^^^^^ expected enum `Job`, found fn item
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected enum `Job`
[INFO] [stdout]            found fn item `fn(Box<(dyn FnOnce() + Send + 'static)>) -> Job {Job::Task}`
[INFO] [stdout] help: use parentheses to instantiate this tuple variant
[INFO] [stdout]    |
[INFO] [stdout] 57 |             self.sender.send(Job::Task(_)).unwrap(); // sending Stop to all threads in the pool
[INFO] [stdout]    |                                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 2 previous errors; 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "08618f942524ff00e6cc268da2c9093a5786d6d674a37dd99a7cd2eaa33c4fdc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08618f942524ff00e6cc268da2c9093a5786d6d674a37dd99a7cd2eaa33c4fdc", kill_on_drop: false }`
[INFO] [stdout] 08618f942524ff00e6cc268da2c9093a5786d6d674a37dd99a7cd2eaa33c4fdc