[INFO] cloning repository https://github.com/pschafhalter/tokio-benchmarking
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pschafhalter/tokio-benchmarking" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpschafhalter%2Ftokio-benchmarking", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpschafhalter%2Ftokio-benchmarking'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5e6b18056713ce1b7d03c5b3fee740d0b5c7eff8
[INFO] checking pschafhalter/tokio-benchmarking against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpschafhalter%2Ftokio-benchmarking" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pschafhalter/tokio-benchmarking on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/pschafhalter/tokio-benchmarking
[INFO] finished tweaking git repo https://github.com/pschafhalter/tokio-benchmarking
[INFO] tweaked toml for git repo https://github.com/pschafhalter/tokio-benchmarking written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/pschafhalter/tokio-benchmarking 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 10597187e60242c2e21dd764549ebf2211fce1f1f8c7e280967da07f96be5cfc
[INFO] running `Command { std: "docker" "start" "-a" "10597187e60242c2e21dd764549ebf2211fce1f1f8c7e280967da07f96be5cfc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "10597187e60242c2e21dd764549ebf2211fce1f1f8c7e280967da07f96be5cfc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "10597187e60242c2e21dd764549ebf2211fce1f1f8c7e280967da07f96be5cfc", kill_on_drop: false }`
[INFO] [stdout] 10597187e60242c2e21dd764549ebf2211fce1f1f8c7e280967da07f96be5cfc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 25e0d3efe4fea9f1e15566f2ff07b3091bd9d47737fa1c84c003f0d2031ff776
[INFO] running `Command { std: "docker" "start" "-a" "25e0d3efe4fea9f1e15566f2ff07b3091bd9d47737fa1c84c003f0d2031ff776", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling libc v0.2.105
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]    Compiling futures-core v0.3.17
[INFO] [stderr]    Compiling futures-macro v0.3.17
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]    Compiling futures-channel v0.3.17
[INFO] [stderr]    Compiling futures-task v0.3.17
[INFO] [stderr]    Compiling futures-util v0.3.17
[INFO] [stderr]     Checking pin-project-lite v0.2.7
[INFO] [stderr]     Checking futures-sink v0.3.17
[INFO] [stderr]     Checking futures-io v0.3.17
[INFO] [stderr]     Checking smallvec v1.7.0
[INFO] [stderr]     Checking lock_api v0.4.5
[INFO] [stderr]    Compiling tokio v1.12.0
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]     Checking parking_lot_core v0.8.5
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking mio v0.7.14
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking parking_lot v0.11.2
[INFO] [stderr]    Compiling tokio-macros v1.5.0
[INFO] [stderr]     Checking futures-executor v0.3.17
[INFO] [stderr]     Checking futures v0.3.17
[INFO] [stderr]     Checking tokio-benchmarking v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `futures::future::select_all`
[INFO] [stdout]  --> src/bin/message_passing.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use futures::future::select_all;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `futures::future::select_all`
[INFO] [stdout]  --> src/bin/message_passing.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use futures::future::select_all;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sleep_duration_2`
[INFO] [stdout]   --> src/bin/semaphores.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 33 |         let sleep_duration_2 = sleep_duration.clone();
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sleep_duration_2`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sleep_duration_2`
[INFO] [stdout]   --> src/bin/semaphores.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 33 |         let sleep_duration_2 = sleep_duration.clone();
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sleep_duration_2`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `max_consumers`
[INFO] [stdout]    --> src/bin/message_passing.rs:116:5
[INFO] [stdout]     |
[INFO] [stdout] 116 |     max_consumers: usize,
[INFO] [stdout]     |     ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_max_consumers`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `simple_consumer` is never used
[INFO] [stdout]    --> src/bin/message_passing.rs:110:4
[INFO] [stdout]     |
[INFO] [stdout] 110 | fn simple_consumer(event: Event, stats_tx: UnboundedSender<Duration>) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `consumer_manager` is never used
[INFO] [stdout]    --> src/bin/message_passing.rs:115:10
[INFO] [stdout]     |
[INFO] [stdout] 115 | async fn consumer_manager(
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `max_consumers`
[INFO] [stdout]    --> src/bin/message_passing.rs:116:5
[INFO] [stdout]     |
[INFO] [stdout] 116 |     max_consumers: usize,
[INFO] [stdout]     |     ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_max_consumers`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `create_time` is never read
[INFO] [stdout]   --> src/bin/semaphores.rs:83:5
[INFO] [stdout]    |
[INFO] [stdout] 82 | struct Event {
[INFO] [stdout]    |        ----- field in this struct
[INFO] [stdout] 83 |     create_time: Instant,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `simple_consumer` is never used
[INFO] [stdout]    --> src/bin/message_passing.rs:110:4
[INFO] [stdout]     |
[INFO] [stdout] 110 | fn simple_consumer(event: Event, stats_tx: UnboundedSender<Duration>) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `consumer_manager` is never used
[INFO] [stdout]    --> src/bin/message_passing.rs:115:10
[INFO] [stdout]     |
[INFO] [stdout] 115 | async fn consumer_manager(
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `create_time` is never read
[INFO] [stdout]   --> src/bin/semaphores.rs:83:5
[INFO] [stdout]    |
[INFO] [stdout] 82 | struct Event {
[INFO] [stdout]    |        ----- field in this struct
[INFO] [stdout] 83 |     create_time: Instant,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.53s
[INFO] running `Command { std: "docker" "inspect" "25e0d3efe4fea9f1e15566f2ff07b3091bd9d47737fa1c84c003f0d2031ff776", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25e0d3efe4fea9f1e15566f2ff07b3091bd9d47737fa1c84c003f0d2031ff776", kill_on_drop: false }`
[INFO] [stdout] 25e0d3efe4fea9f1e15566f2ff07b3091bd9d47737fa1c84c003f0d2031ff776