[INFO] cloning repository https://github.com/JackThomson2/Threadpooler
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JackThomson2/Threadpooler" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJackThomson2%2FThreadpooler", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJackThomson2%2FThreadpooler'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f51c82f04fbaa442929daaf3bdd966a5b64be7c5
[INFO] testing JackThomson2/Threadpooler against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJackThomson2%2FThreadpooler" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JackThomson2/Threadpooler on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/JackThomson2/Threadpooler
[INFO] finished tweaking git repo https://github.com/JackThomson2/Threadpooler
[INFO] tweaked toml for git repo https://github.com/JackThomson2/Threadpooler written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/JackThomson2/Threadpooler already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded sys-info v0.5.10
[INFO] [stderr]   Downloaded criterion_bencher_compat v0.3.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "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] e2885c44de8e90ec4772454a71fc462854e3c6b622e23ef017fd3c0769c9d03f
[INFO] running `Command { std: "docker" "start" "-a" "e2885c44de8e90ec4772454a71fc462854e3c6b622e23ef017fd3c0769c9d03f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e2885c44de8e90ec4772454a71fc462854e3c6b622e23ef017fd3c0769c9d03f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e2885c44de8e90ec4772454a71fc462854e3c6b622e23ef017fd3c0769c9d03f", kill_on_drop: false }`
[INFO] [stdout] e2885c44de8e90ec4772454a71fc462854e3c6b622e23ef017fd3c0769c9d03f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1586d76e71a1824e6910888430837168f8cdfd83c8803d6d3b9831aeef96b07c
[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" "1586d76e71a1824e6910888430837168f8cdfd83c8803d6d3b9831aeef96b07c", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.42
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling parking_lot_core v0.8.0
[INFO] [stderr]    Compiling serde_cbor v0.11.1
[INFO] [stderr]    Compiling serde_json v1.0.58
[INFO] [stderr]    Compiling bstr v0.2.13
[INFO] [stderr]    Compiling criterion-plot v0.4.3
[INFO] [stderr]    Compiling parking_lot v0.11.0
[INFO] [stderr]    Compiling csv v1.1.3
[INFO] [stderr]    Compiling tinytemplate v1.1.0
[INFO] [stderr]    Compiling plotters v0.2.15
[INFO] [stderr]    Compiling serde_derive v1.0.116
[INFO] [stderr]    Compiling criterion v0.3.3
[INFO] [stderr]    Compiling threadpooler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Steal`
[INFO] [stdout]  --> src/newJob.rs:1:23
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crossbeam_deque::{Steal, Worker};
[INFO] [stdout]   |                       ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread::spawn`
[INFO] [stdout]  --> src/pool.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::thread::spawn;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `COMPLETE`
[INFO] [stdout]   --> src/lockedBatch.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | const COMPLETE: u8 = 0b000_0010;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `lockedBatch` should have a snake case name
[INFO] [stdout]  --> src/lib.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | mod lockedBatch;
[INFO] [stdout]   |     ^^^^^^^^^^^ help: convert the identifier to snake case: `locked_batch`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `newJob` should have a snake case name
[INFO] [stdout]  --> src/lib.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub mod newJob;
[INFO] [stdout]   |         ^^^^^^ help: convert the identifier to snake case: `new_job`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/main.rs:12:17
[INFO] [stdout]    |
[INFO] [stdout] 12 |             for i in 0..1_000 {
[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: constant `to_test` should have an upper case name
[INFO] [stdout]  --> src/main.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | const to_test: usize = 100_000;
[INFO] [stdout]   |       ^^^^^^^ help: convert the identifier to upper case: `TO_TEST`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 33.30s
[INFO] running `Command { std: "docker" "inspect" "1586d76e71a1824e6910888430837168f8cdfd83c8803d6d3b9831aeef96b07c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1586d76e71a1824e6910888430837168f8cdfd83c8803d6d3b9831aeef96b07c", kill_on_drop: false }`
[INFO] [stdout] 1586d76e71a1824e6910888430837168f8cdfd83c8803d6d3b9831aeef96b07c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", 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] c662fc4cc33360931084d9f8193c0bacc922597c5de99554a2768b37d308b581
[INFO] running `Command { std: "docker" "start" "-a" "c662fc4cc33360931084d9f8193c0bacc922597c5de99554a2768b37d308b581", kill_on_drop: false }`
[INFO] [stderr]    Compiling sys-info v0.5.10
[INFO] [stderr]    Compiling criterion_bencher_compat v0.3.3
[INFO] [stdout] warning: unused import: `Steal`
[INFO] [stdout]  --> src/newJob.rs:1:23
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crossbeam_deque::{Steal, Worker};
[INFO] [stdout]   |                       ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread::spawn`
[INFO] [stdout]  --> src/pool.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::thread::spawn;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `COMPLETE`
[INFO] [stdout]   --> src/lockedBatch.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | const COMPLETE: u8 = 0b000_0010;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `lockedBatch` should have a snake case name
[INFO] [stdout]  --> src/lib.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | mod lockedBatch;
[INFO] [stdout]   |     ^^^^^^^^^^^ help: convert the identifier to snake case: `locked_batch`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `newJob` should have a snake case name
[INFO] [stdout]  --> src/lib.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub mod newJob;
[INFO] [stdout]   |         ^^^^^^ help: convert the identifier to snake case: `new_job`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rayoff v0.1.0 (https://github.com/aeyakovenko/rayoff#a01d3f33)
[INFO] [stderr]    Compiling threadpooler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::thread::spawn`
[INFO] [stdout]  --> src/pool.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::thread::spawn;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/main.rs:12:17
[INFO] [stdout]    |
[INFO] [stdout] 12 |             for i in 0..1_000 {
[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: constant `to_test` should have an upper case name
[INFO] [stdout]  --> src/main.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | const to_test: usize = 100_000;
[INFO] [stdout]   |       ^^^^^^^ help: convert the identifier to upper case: `TO_TEST`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/newJob.rs:95:17
[INFO] [stdout]    |
[INFO] [stdout] 95 |             for i in 0..4 {
[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: constant is never used: `COMPLETE`
[INFO] [stdout]   --> src/lockedBatch.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | const COMPLETE: u8 = 0b000_0010;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `lockedBatch` should have a snake case name
[INFO] [stdout]  --> src/lib.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | mod lockedBatch;
[INFO] [stdout]   |     ^^^^^^^^^^^ help: convert the identifier to snake case: `locked_batch`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `newJob` should have a snake case name
[INFO] [stdout]  --> src/lib.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub mod newJob;
[INFO] [stdout]   |         ^^^^^^ help: convert the identifier to snake case: `new_job`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 5.48s
[INFO] running `Command { std: "docker" "inspect" "c662fc4cc33360931084d9f8193c0bacc922597c5de99554a2768b37d308b581", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c662fc4cc33360931084d9f8193c0bacc922597c5de99554a2768b37d308b581", kill_on_drop: false }`
[INFO] [stdout] c662fc4cc33360931084d9f8193c0bacc922597c5de99554a2768b37d308b581
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 2be50c255c77cfa1ae2a0a78e7644a5b77d77d45140f01200b28666885071c73
[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" "2be50c255c77cfa1ae2a0a78e7644a5b77d77d45140f01200b28666885071c73", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused import: `Steal`
[INFO] [stderr]  --> src/newJob.rs:1:23
[INFO] [stderr]   |
[INFO] [stderr] 1 | use crossbeam_deque::{Steal, Worker};
[INFO] [stderr]   |                       ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::thread::spawn`
[INFO] [stderr]  --> src/pool.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::thread::spawn;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `COMPLETE`
[INFO] [stderr]   --> src/lockedBatch.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | const COMPLETE: u8 = 0b000_0010;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: module `lockedBatch` should have a snake case name
[INFO] [stderr]  --> src/lib.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | mod lockedBatch;
[INFO] [stderr]   |     ^^^^^^^^^^^ help: convert the identifier to snake case: `locked_batch`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: module `newJob` should have a snake case name
[INFO] [stderr]  --> src/lib.rs:3:9
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub mod newJob;
[INFO] [stderr]   |         ^^^^^^ help: convert the identifier to snake case: `new_job`
[INFO] [stderr] 
[INFO] [stderr] warning: `threadpooler` (lib) generated 5 warnings
[INFO] [stderr] warning: unused import: `std::thread::spawn`
[INFO] [stderr]  --> src/pool.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::thread::spawn;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/newJob.rs:95:17
[INFO] [stderr]    |
[INFO] [stderr] 95 |             for i in 0..4 {
[INFO] [stderr]    |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/main.rs:12:17
[INFO] [stderr]    |
[INFO] [stderr] 12 |             for i in 0..1_000 {
[INFO] [stderr]    |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant `to_test` should have an upper case name
[INFO] [stderr]  --> src/main.rs:5:7
[INFO] [stderr]   |
[INFO] [stderr] 5 | const to_test: usize = 100_000;
[INFO] [stderr]   |       ^^^^^^^ help: convert the identifier to upper case: `TO_TEST`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `threadpooler` (lib test) generated 5 warnings (3 duplicates)
[INFO] [stderr] warning: `threadpooler` (bin "threadpooler" test) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.23s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/threadpooler-c0dc2431ea4d1ae0)
[INFO] [stdout] running 7 tests
[INFO] [stderr] 
[INFO] [stderr] thread 'Worker thread 5' has overflowed its stack
[INFO] [stderr] fatal runtime error: stack overflow
[INFO] [stderr] error: test failed, to rerun pass '--lib'
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/deps/threadpooler-c0dc2431ea4d1ae0` (signal: 6, SIGABRT: process abort signal)
[INFO] running `Command { std: "docker" "inspect" "2be50c255c77cfa1ae2a0a78e7644a5b77d77d45140f01200b28666885071c73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2be50c255c77cfa1ae2a0a78e7644a5b77d77d45140f01200b28666885071c73", kill_on_drop: false }`
[INFO] [stdout] 2be50c255c77cfa1ae2a0a78e7644a5b77d77d45140f01200b28666885071c73