[INFO] fetching crate threads_pool 0.2.5...
[INFO] checking threads_pool-0.2.5 against master#6250d56355d72264ece721e8d0dc95b16a6824b1 for pr-68350
[INFO] extracting crate threads_pool 0.2.5 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate threads_pool 0.2.5 on toolchain 6250d56355d72264ece721e8d0dc95b16a6824b1
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate threads_pool 0.2.5
[INFO] finished tweaking crates.io crate threads_pool 0.2.5
[INFO] tweaked toml for crates.io crate threads_pool 0.2.5 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate threads_pool 0.2.5 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 80faa68b54eaf96d32dee57a3f5c935b5f74395d86449da0c95f2a4f6e43bb62
[INFO] running `"docker" "start" "-a" "80faa68b54eaf96d32dee57a3f5c935b5f74395d86449da0c95f2a4f6e43bb62"`
[INFO] [stderr]     Checking async-task v1.0.0
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking memchr v2.2.1
[INFO] [stderr]     Checking num_cpus v1.10.1
[INFO] [stderr]     Checking atty v0.2.12
[INFO] [stderr]     Checking crossbeam-epoch v0.7.1
[INFO] [stderr]    Compiling syn v0.15.39
[INFO] [stderr]     Checking tinytemplate v1.0.2
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking crossbeam-deque v0.6.3
[INFO] [stderr]     Checking bstr v0.2.1
[INFO] [stderr]     Checking csv-core v0.1.6
[INFO] [stderr]     Checking rayon-core v1.5.0
[INFO] [stderr]     Checking csv v1.1.1
[INFO] [stderr]     Checking parking_lot_core v0.4.0
[INFO] [stderr]     Checking rayon v1.1.0
[INFO] [stderr]     Checking parking_lot v0.7.1
[INFO] [stderr]     Checking threads_pool v0.2.5 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling serde_derive v1.0.94
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]    --> src/scheduler.rs:820:28
[INFO] [stderr]     |
[INFO] [stderr] 820 |     fn block_on(&mut self, f: F) -> Result<T, ExecutionError> {
[INFO] [stderr]     |                            ^ help: consider prefixing with an underscore: `_f`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `future`
[INFO] [stderr]    --> src/scheduler.rs:825:13
[INFO] [stderr]     |
[INFO] [stderr] 825 |         let future = async move {
[INFO] [stderr]     |             ^^^^^^ help: consider prefixing with an underscore: `_future`
[INFO] [stderr] 
[INFO] [stderr]     Checking criterion v0.2.11
[INFO] [stderr] warning: unused import: `threads_pool::prelude::*`
[INFO] [stderr]  --> examples/future.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use threads_pool::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]    --> src/scheduler.rs:820:28
[INFO] [stderr]     |
[INFO] [stderr] 820 |     fn block_on(&mut self, f: F) -> Result<T, ExecutionError> {
[INFO] [stderr]     |                            ^ help: consider prefixing with an underscore: `_f`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `future`
[INFO] [stderr]    --> src/scheduler.rs:825:13
[INFO] [stderr]     |
[INFO] [stderr] 825 |         let future = async move {
[INFO] [stderr]     |             ^^^^^^ help: consider prefixing with an underscore: `_future`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 53.51s
[INFO] running `"docker" "inspect" "80faa68b54eaf96d32dee57a3f5c935b5f74395d86449da0c95f2a4f6e43bb62"`
[INFO] running `"docker" "rm" "-f" "80faa68b54eaf96d32dee57a3f5c935b5f74395d86449da0c95f2a4f6e43bb62"`
[INFO] [stdout] 80faa68b54eaf96d32dee57a3f5c935b5f74395d86449da0c95f2a4f6e43bb62