[INFO] crate threads_pool 0.2.5 is already in cache
[INFO] checking threads_pool-0.2.5 against master#ba72b15666b2491415aec703a02c2364fe5e2790 for pr-71140
[INFO] extracting crate threads_pool 0.2.5 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate threads_pool 0.2.5 on toolchain ba72b15666b2491415aec703a02c2364fe5e2790
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ba72b15666b2491415aec703a02c2364fe5e2790" "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-1/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" "+ba72b15666b2491415aec703a02c2364fe5e2790" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+ba72b15666b2491415aec703a02c2364fe5e2790" "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] 6005ba251d59da7b2b77e5cd1774aea34ba46fc7a1644eeea9fa33529837ae32
[INFO] running `"docker" "start" "-a" "6005ba251d59da7b2b77e5cd1774aea34ba46fc7a1644eeea9fa33529837ae32"`
[INFO] [stderr]    Compiling libc v0.2.59
[INFO] [stderr]     Checking futures-channel v0.3.1
[INFO] [stderr]     Checking crossbeam-channel v0.3.8
[INFO] [stderr]     Checking async-task v1.0.0
[INFO] [stderr]    Compiling syn v0.15.39
[INFO] [stderr]     Checking crossbeam-epoch v0.7.1
[INFO] [stderr]     Checking regex-automata v0.1.7
[INFO] [stderr]     Checking rand_xoshiro v0.1.0
[INFO] [stderr]     Checking criterion-plot v0.3.1
[INFO] [stderr]     Checking crossbeam-deque v0.6.3
[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 rayon-core v1.5.0
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking csv-core v0.1.6
[INFO] [stderr]     Checking bstr v0.2.1
[INFO] [stderr]     Checking rayon v1.1.0
[INFO] [stderr]     Checking csv v1.1.1
[INFO] [stderr]     Checking parking_lot_core v0.4.0
[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: if this is intentional, prefix it 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: if this is intentional, prefix it with an underscore: `_future`
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[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: 1 warning emitted
[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: if this is intentional, prefix it 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: if this is intentional, prefix it with an underscore: `_future`
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 34.95s
[INFO] running `"docker" "inspect" "6005ba251d59da7b2b77e5cd1774aea34ba46fc7a1644eeea9fa33529837ae32"`
[INFO] running `"docker" "rm" "-f" "6005ba251d59da7b2b77e5cd1774aea34ba46fc7a1644eeea9fa33529837ae32"`
[INFO] [stdout] 6005ba251d59da7b2b77e5cd1774aea34ba46fc7a1644eeea9fa33529837ae32