[INFO] fetching crate thread_pool_pre 0.1.0...
[INFO] testing thread_pool_pre-0.1.0 against 1.91.0 for beta-1.92-2
[INFO] extracting crate thread_pool_pre 0.1.0 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate thread_pool_pre 0.1.0
[INFO] finished tweaking crates.io crate thread_pool_pre 0.1.0
[INFO] tweaked toml for crates.io crate thread_pool_pre 0.1.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate thread_pool_pre 0.1.0 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate thread_pool_pre 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "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-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2b74312ee98f221eb8df56e2436b373193db817d66cc8a16832902b52b0a78b2
[INFO] running `Command { std: "docker" "start" "-a" "2b74312ee98f221eb8df56e2436b373193db817d66cc8a16832902b52b0a78b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2b74312ee98f221eb8df56e2436b373193db817d66cc8a16832902b52b0a78b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b74312ee98f221eb8df56e2436b373193db817d66cc8a16832902b52b0a78b2", kill_on_drop: false }`
[INFO] [stdout] 2b74312ee98f221eb8df56e2436b373193db817d66cc8a16832902b52b0a78b2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2965570b9c8c8eb8e80a732db36b18985d2e5deb01e8289746590aa5edf10a43
[INFO] running `Command { std: "docker" "start" "-a" "2965570b9c8c8eb8e80a732db36b18985d2e5deb01e8289746590aa5edf10a43", kill_on_drop: false }`
[INFO] [stderr]    Compiling thread_pool_pre v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `workers` is never read
[INFO] [stdout]   --> src/lib.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct ThreadPool{
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 15 |     workers: Vec<Worker>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id` and `thread` are never read
[INFO] [stdout]   --> src/lib.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 39 | struct Worker{
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 40 |     id: usize,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 41 |     thread: thread::JoinHandle<()>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.04s
[INFO] running `Command { std: "docker" "inspect" "2965570b9c8c8eb8e80a732db36b18985d2e5deb01e8289746590aa5edf10a43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2965570b9c8c8eb8e80a732db36b18985d2e5deb01e8289746590aa5edf10a43", kill_on_drop: false }`
[INFO] [stdout] 2965570b9c8c8eb8e80a732db36b18985d2e5deb01e8289746590aa5edf10a43
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e6084b817469b1e1c672d3f8993a05819797261e96197675d9810235e861756a
[INFO] running `Command { std: "docker" "start" "-a" "e6084b817469b1e1c672d3f8993a05819797261e96197675d9810235e861756a", kill_on_drop: false }`
[INFO] [stdout] warning: field `workers` is never read
[INFO] [stdout]   --> src/lib.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct ThreadPool{
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 15 |     workers: Vec<Worker>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id` and `thread` are never read
[INFO] [stdout]   --> src/lib.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 39 | struct Worker{
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 40 |     id: usize,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 41 |     thread: thread::JoinHandle<()>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling thread_pool_pre v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `workers` is never read
[INFO] [stdout]   --> src/lib.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct ThreadPool{
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 15 |     workers: Vec<Worker>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id` and `thread` are never read
[INFO] [stdout]   --> src/lib.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 39 | struct Worker{
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 40 |     id: usize,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 41 |     thread: thread::JoinHandle<()>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `Command { std: "docker" "inspect" "e6084b817469b1e1c672d3f8993a05819797261e96197675d9810235e861756a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6084b817469b1e1c672d3f8993a05819797261e96197675d9810235e861756a", kill_on_drop: false }`
[INFO] [stdout] e6084b817469b1e1c672d3f8993a05819797261e96197675d9810235e861756a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d3d6119dfed315a44a46fc5ee1ad3bb22ea13c8598d2e99384025b0cf5393b4f
[INFO] running `Command { std: "docker" "start" "-a" "d3d6119dfed315a44a46fc5ee1ad3bb22ea13c8598d2e99384025b0cf5393b4f", kill_on_drop: false }`
[INFO] [stderr] warning: field `workers` is never read
[INFO] [stdout] 
[INFO] [stderr]   --> src/lib.rs:15:5
[INFO] [stdout] running 0 tests
[INFO] [stderr]    |
[INFO] [stdout] 
[INFO] [stderr] 14 | pub struct ThreadPool{
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]    |            ---------- field in this struct
[INFO] [stdout] 
[INFO] [stderr] 15 |     workers: Vec<Worker>,
[INFO] [stdout] 
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stdout] running 0 tests
[INFO] [stderr]    |
[INFO] [stdout] 
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: fields `id` and `thread` are never read
[INFO] [stderr]   --> src/lib.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 39 | struct Worker{
[INFO] [stderr]    |        ------ fields in this struct
[INFO] [stderr] 40 |     id: usize,
[INFO] [stderr]    |     ^^
[INFO] [stderr] 41 |     thread: thread::JoinHandle<()>,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `thread_pool_pre` (lib) generated 2 warnings
[INFO] [stderr] warning: `thread_pool_pre` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/thread_pool_pre-0354e6088205080a)
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/thread_pool_pre-a5d78ef4e0d58c15)
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests thread_pool_pre
[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" "d3d6119dfed315a44a46fc5ee1ad3bb22ea13c8598d2e99384025b0cf5393b4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3d6119dfed315a44a46fc5ee1ad3bb22ea13c8598d2e99384025b0cf5393b4f", kill_on_drop: false }`
[INFO] [stdout] d3d6119dfed315a44a46fc5ee1ad3bb22ea13c8598d2e99384025b0cf5393b4f