[INFO] cloning repository https://github.com/Beardiegames/multi_threaded_pool
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Beardiegames/multi_threaded_pool" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBeardiegames%2Fmulti_threaded_pool", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBeardiegames%2Fmulti_threaded_pool'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6b824f59af668d373ed29b7c22be8b78f91134a2
[INFO] testing Beardiegames/multi_threaded_pool against try#2440211fe03bc45c89b6dc1a3df18382ce91e32b for pr-146098-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBeardiegames%2Fmulti_threaded_pool" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Beardiegames/multi_threaded_pool
[INFO] finished tweaking git repo https://github.com/Beardiegames/multi_threaded_pool
[INFO] tweaked toml for git repo https://github.com/Beardiegames/multi_threaded_pool written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Beardiegames/multi_threaded_pool on toolchain 2440211fe03bc45c89b6dc1a3df18382ce91e32b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Beardiegames/multi_threaded_pool 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" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 926870a89be6d738502b329f16047ef73500bf67761c65cc11f38c25c1bf783a
[INFO] running `Command { std: "docker" "start" "-a" "926870a89be6d738502b329f16047ef73500bf67761c65cc11f38c25c1bf783a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "926870a89be6d738502b329f16047ef73500bf67761c65cc11f38c25c1bf783a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "926870a89be6d738502b329f16047ef73500bf67761c65cc11f38c25c1bf783a", kill_on_drop: false }`
[INFO] [stdout] 926870a89be6d738502b329f16047ef73500bf67761c65cc11f38c25c1bf783a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ff4416a45a78f1f7e845aea32d392d2247e090529149fec2299f4e7c75676059
[INFO] running `Command { std: "docker" "start" "-a" "ff4416a45a78f1f7e845aea32d392d2247e090529149fec2299f4e7c75676059", kill_on_drop: false }`
[INFO] [stderr]    Compiling multi_threaded_pool v0.1.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `DataCell`, `DataManager`, and `ObjectPool`
[INFO] [stdout]   --> src/tests.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 | use crate::{DataCell, ObjectPool, DataManager};
[INFO] [stdout]    |             ^^^^^^^^  ^^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: if this is a test module, consider adding a `#[cfg(test)]` to the containing module
[INFO] [stdout]   --> src/lib.rs:3:1
[INFO] [stdout]    |
[INFO] [stdout]  3 | mod tests;
[INFO] [stdout]    | ^^^^^^^^^^
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/tests.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | #[warn(unused_imports)]
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PoolObject` is never constructed
[INFO] [stdout]   --> src/tests.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | struct PoolObject(bool);
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/shared.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |         drop(handle);
[INFO] [stdout]    |         ^^^^^------^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              argument has type `&mut DataCell<LocalData>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 24 -         drop(handle);
[INFO] [stdout] 24 +         let _ = handle;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/shared.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 33 |             drop(handle);
[INFO] [stdout]    |             ^^^^^------^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  argument has type `&mut DataCell<LocalData>`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 33 -             drop(handle);
[INFO] [stdout] 33 +             let _ = handle;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/shared.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |         drop(handle);
[INFO] [stdout]    |         ^^^^^------^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              argument has type `&mut DataCell<LocalData>`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 41 -         drop(handle);
[INFO] [stdout] 41 +         let _ = handle;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/shared.rs:50:13
[INFO] [stdout]    |
[INFO] [stdout] 50 |             drop(handle);
[INFO] [stdout]    |             ^^^^^------^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  argument has type `&mut DataCell<LocalData>`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 50 -             drop(handle);
[INFO] [stdout] 50 +             let _ = handle;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/shared.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |         drop(handle);
[INFO] [stdout]    |         ^^^^^------^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              argument has type `&mut DataCell<LocalData>`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 58 -         drop(handle);
[INFO] [stdout] 58 +         let _ = handle;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/shared.rs:67:13
[INFO] [stdout]    |
[INFO] [stdout] 67 |             drop(handle);
[INFO] [stdout]    |             ^^^^^------^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  argument has type `&mut DataCell<LocalData>`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 67 -             drop(handle);
[INFO] [stdout] 67 +             let _ = handle;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `Command { std: "docker" "inspect" "ff4416a45a78f1f7e845aea32d392d2247e090529149fec2299f4e7c75676059", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff4416a45a78f1f7e845aea32d392d2247e090529149fec2299f4e7c75676059", kill_on_drop: false }`
[INFO] [stdout] ff4416a45a78f1f7e845aea32d392d2247e090529149fec2299f4e7c75676059
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e0143c8637e906f275ba4baa1a1231db10d41b49e8bfc0f41f47694457852b3c
[INFO] running `Command { std: "docker" "start" "-a" "e0143c8637e906f275ba4baa1a1231db10d41b49e8bfc0f41f47694457852b3c", kill_on_drop: false }`
[INFO] [stdout] warning: unused imports: `DataCell`, `DataManager`, and `ObjectPool`
[INFO] [stdout]   --> src/tests.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 | use crate::{DataCell, ObjectPool, DataManager};
[INFO] [stdout]    |             ^^^^^^^^  ^^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: if this is a test module, consider adding a `#[cfg(test)]` to the containing module
[INFO] [stdout]   --> src/lib.rs:3:1
[INFO] [stdout]    |
[INFO] [stdout]  3 | mod tests;
[INFO] [stdout]    | ^^^^^^^^^^
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/tests.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | #[warn(unused_imports)]
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PoolObject` is never constructed
[INFO] [stdout]   --> src/tests.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | struct PoolObject(bool);
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/shared.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |         drop(handle);
[INFO] [stdout]    |         ^^^^^------^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              argument has type `&mut DataCell<LocalData>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 24 -         drop(handle);
[INFO] [stdout] 24 +         let _ = handle;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/shared.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 33 |             drop(handle);
[INFO] [stdout]    |             ^^^^^------^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  argument has type `&mut DataCell<LocalData>`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 33 -             drop(handle);
[INFO] [stdout] 33 +             let _ = handle;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/shared.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |         drop(handle);
[INFO] [stdout]    |         ^^^^^------^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              argument has type `&mut DataCell<LocalData>`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 41 -         drop(handle);
[INFO] [stdout] 41 +         let _ = handle;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/shared.rs:50:13
[INFO] [stdout]    |
[INFO] [stdout] 50 |             drop(handle);
[INFO] [stdout]    |             ^^^^^------^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  argument has type `&mut DataCell<LocalData>`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 50 -             drop(handle);
[INFO] [stdout] 50 +             let _ = handle;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/shared.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |         drop(handle);
[INFO] [stdout]    |         ^^^^^------^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              argument has type `&mut DataCell<LocalData>`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 58 -         drop(handle);
[INFO] [stdout] 58 +         let _ = handle;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling multi_threaded_pool v0.1.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/shared.rs:67:13
[INFO] [stdout]    |
[INFO] [stdout] 67 |             drop(handle);
[INFO] [stdout]    |             ^^^^^------^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  argument has type `&mut DataCell<LocalData>`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 67 -             drop(handle);
[INFO] [stdout] 67 +             let _ = handle;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Arc` and `Mutex`
[INFO] [stdout]  --> src/tests.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 |     sync::{Arc, Mutex}, 
[INFO] [stdout]   |            ^^^  ^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]  --> src/tests.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | #[warn(unused_imports)]
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `DataCell` and `ObjectPool`
[INFO] [stdout]   --> src/tests.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 | use crate::{DataCell, ObjectPool, DataManager};
[INFO] [stdout]    |             ^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/tests.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | #[warn(unused_imports)]
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/tests.rs:104:9
[INFO] [stdout]     |
[INFO] [stdout] 104 |     let mut cluster_updates: (usize, usize) = (
[INFO] [stdout]     |         ----^^^^^^^^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/tests.rs:17:19
[INFO] [stdout]    |
[INFO] [stdout] 17 | struct PoolObject(bool);
[INFO] [stdout]    |        ---------- ^^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `PoolObject` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/shared.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |         drop(handle);
[INFO] [stdout]    |         ^^^^^------^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              argument has type `&mut DataCell<LocalData>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 24 -         drop(handle);
[INFO] [stdout] 24 +         let _ = handle;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/shared.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 33 |             drop(handle);
[INFO] [stdout]    |             ^^^^^------^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  argument has type `&mut DataCell<LocalData>`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 33 -             drop(handle);
[INFO] [stdout] 33 +             let _ = handle;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/shared.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |         drop(handle);
[INFO] [stdout]    |         ^^^^^------^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              argument has type `&mut DataCell<LocalData>`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 41 -         drop(handle);
[INFO] [stdout] 41 +         let _ = handle;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/shared.rs:50:13
[INFO] [stdout]    |
[INFO] [stdout] 50 |             drop(handle);
[INFO] [stdout]    |             ^^^^^------^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  argument has type `&mut DataCell<LocalData>`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 50 -             drop(handle);
[INFO] [stdout] 50 +             let _ = handle;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/shared.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |         drop(handle);
[INFO] [stdout]    |         ^^^^^------^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              argument has type `&mut DataCell<LocalData>`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 58 -         drop(handle);
[INFO] [stdout] 58 +         let _ = handle;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/shared.rs:67:13
[INFO] [stdout]    |
[INFO] [stdout] 67 |             drop(handle);
[INFO] [stdout]    |             ^^^^^------^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  argument has type `&mut DataCell<LocalData>`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 67 -             drop(handle);
[INFO] [stdout] 67 +             let _ = handle;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.77s
[INFO] running `Command { std: "docker" "inspect" "e0143c8637e906f275ba4baa1a1231db10d41b49e8bfc0f41f47694457852b3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0143c8637e906f275ba4baa1a1231db10d41b49e8bfc0f41f47694457852b3c", kill_on_drop: false }`
[INFO] [stdout] e0143c8637e906f275ba4baa1a1231db10d41b49e8bfc0f41f47694457852b3c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a58228465fc2f925a9f28b4d520b167b8ae8c5919b6a746240a95271d0e6a5d2
[INFO] running `Command { std: "docker" "start" "-a" "a58228465fc2f925a9f28b4d520b167b8ae8c5919b6a746240a95271d0e6a5d2", kill_on_drop: false }`
[INFO] [stderr] warning: unused imports: `DataCell`, `DataManager`, and `ObjectPool`
[INFO] [stderr]   --> src/tests.rs:11:13
[INFO] [stderr]    |
[INFO] [stderr] 11 | use crate::{DataCell, ObjectPool, DataManager};
[INFO] [stderr]    |             ^^^^^^^^  ^^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: if this is a test module, consider adding a `#[cfg(test)]` to the containing module
[INFO] [stderr]   --> src/lib.rs:3:1
[INFO] [stderr]    |
[INFO] [stderr]  3 | mod tests;
[INFO] [stderr]    | ^^^^^^^^^^
[INFO] [stderr] note: the lint level is defined here
[INFO] [stderr]   --> src/tests.rs:10:8
[INFO] [stderr]    |
[INFO] [stderr] 10 | #[warn(unused_imports)]
[INFO] [stderr]    |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `PoolObject` is never constructed
[INFO] [stderr]   --> src/tests.rs:17:8
[INFO] [stderr]    |
[INFO] [stderr] 17 | struct PoolObject(bool);
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stderr]   --> src/shared.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |         drop(handle);
[INFO] [stderr]    |         ^^^^^------^
[INFO] [stderr]    |              |
[INFO] [stderr]    |              argument has type `&mut DataCell<LocalData>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dropping_references)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]    |
[INFO] [stderr] 24 -         drop(handle);
[INFO] [stderr] 24 +         let _ = handle;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stderr]   --> src/shared.rs:33:13
[INFO] [stderr]    |
[INFO] [stderr] 33 |             drop(handle);
[INFO] [stderr]    |             ^^^^^------^
[INFO] [stderr]    |                  |
[INFO] [stderr]    |                  argument has type `&mut DataCell<LocalData>`
[INFO] [stderr]    |
[INFO] [stderr] help: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]    |
[INFO] [stderr] 33 -             drop(handle);
[INFO] [stderr] 33 +             let _ = handle;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stderr]   --> src/shared.rs:41:9
[INFO] [stderr]    |
[INFO] [stderr] 41 |         drop(handle);
[INFO] [stderr]    |         ^^^^^------^
[INFO] [stderr]    |              |
[INFO] [stderr]    |              argument has type `&mut DataCell<LocalData>`
[INFO] [stderr]    |
[INFO] [stderr] help: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]    |
[INFO] [stderr] 41 -         drop(handle);
[INFO] [stderr] 41 +         let _ = handle;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stderr]   --> src/shared.rs:50:13
[INFO] [stderr]    |
[INFO] [stderr] 50 |             drop(handle);
[INFO] [stderr]    |             ^^^^^------^
[INFO] [stderr]    |                  |
[INFO] [stderr]    |                  argument has type `&mut DataCell<LocalData>`
[INFO] [stderr]    |
[INFO] [stderr] help: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]    |
[INFO] [stderr] 50 -             drop(handle);
[INFO] [stderr] 50 +             let _ = handle;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stderr]   --> src/shared.rs:58:9
[INFO] [stderr]    |
[INFO] [stderr] 58 |         drop(handle);
[INFO] [stderr]    |         ^^^^^------^
[INFO] [stderr]    |              |
[INFO] [stderr]    |              argument has type `&mut DataCell<LocalData>`
[INFO] [stderr]    |
[INFO] [stderr] help: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]    |
[INFO] [stderr] 58 -         drop(handle);
[INFO] [stderr] 58 +         let _ = handle;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stderr]   --> src/shared.rs:67:13
[INFO] [stderr]    |
[INFO] [stderr] 67 |             drop(handle);
[INFO] [stderr]    |             ^^^^^------^
[INFO] [stderr]    |                  |
[INFO] [stderr]    |                  argument has type `&mut DataCell<LocalData>`
[INFO] [stderr]    |
[INFO] [stderr] help: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]    |
[INFO] [stderr] 67 -             drop(handle);
[INFO] [stderr] 67 +             let _ = handle;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: `multi_threaded_pool` (lib) generated 8 warnings (run `cargo fix --lib -p multi_threaded_pool` to apply 1 suggestion)
[INFO] [stderr] warning: unused imports: `Arc` and `Mutex`
[INFO] [stderr]  --> src/tests.rs:6:12
[INFO] [stderr]   |
[INFO] [stderr] 6 |     sync::{Arc, Mutex}, 
[INFO] [stderr]   |            ^^^  ^^^^^
[INFO] [stderr]   |
[INFO] [stderr] note: the lint level is defined here
[INFO] [stderr]  --> src/tests.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | #[warn(unused_imports)]
[INFO] [stderr]   |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `DataCell` and `ObjectPool`
[INFO] [stderr]   --> src/tests.rs:11:13
[INFO] [stderr]    |
[INFO] [stderr] 11 | use crate::{DataCell, ObjectPool, DataManager};
[INFO] [stderr]    |             ^^^^^^^^  ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: the lint level is defined here
[INFO] [stderr]   --> src/tests.rs:10:8
[INFO] [stderr]    |
[INFO] [stderr] 10 | #[warn(unused_imports)]
[INFO] [stderr]    |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/tests.rs:104:9
[INFO] [stderr]     |
[INFO] [stderr] 104 |     let mut cluster_updates: (usize, usize) = (
[INFO] [stderr]     |         ----^^^^^^^^^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]   --> src/tests.rs:17:19
[INFO] [stderr]    |
[INFO] [stderr] 17 | struct PoolObject(bool);
[INFO] [stderr]    |        ---------- ^^^^
[INFO] [stderr]    |        |
[INFO] [stderr]    |        field in this struct
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider removing this field
[INFO] [stderr]    = note: `PoolObject` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `multi_threaded_pool` (lib test) generated 10 warnings (6 duplicates) (run `cargo fix --lib -p multi_threaded_pool --tests` to apply 3 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/multi_threaded_pool-e3ce128b8fc23a2c)
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test tests::clusters_can_iter_over_objects ... ok
[INFO] [stdout] test tests::clusters_can_spawn_objects ... ok
[INFO] [stdout] test tests::clusters_have_factories_for_spawning_specific_types ... ok
[INFO] [stdout] test tests::run_thread_handlers_are_called ... ok
[INFO] [stdout] test tests::clusters_can_destroy_objects ... ok
[INFO] [stdout] test tests::start_stop_threads ... ok
[INFO] [stdout] test tests::a_thread_tracks_opperation_update_time ... ok
[INFO] [stdout] test tests::local_data_can_be_accessed_on_all_threads ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.10s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests multi_threaded_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" "a58228465fc2f925a9f28b4d520b167b8ae8c5919b6a746240a95271d0e6a5d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a58228465fc2f925a9f28b4d520b167b8ae8c5919b6a746240a95271d0e6a5d2", kill_on_drop: false }`
[INFO] [stdout] a58228465fc2f925a9f28b4d520b167b8ae8c5919b6a746240a95271d0e6a5d2