[INFO] fetching crate flume 0.10.2... [INFO] checking flume-0.10.2 against try#45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4 for pr-83744 [INFO] extracting crate flume 0.10.2 into /workspace/builds/worker-3/source [INFO] validating manifest of crates.io crate flume 0.10.2 on toolchain 45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate flume 0.10.2 [INFO] finished tweaking crates.io crate flume 0.10.2 [INFO] tweaked toml for crates.io crate flume 0.10.2 written to /workspace/builds/worker-3/source/Cargo.toml [INFO] crate crates.io crate flume 0.10.2 already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "fetch" "--locked" "--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-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" "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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] fdd80359005c575b1852cbfa86449f44ed7e88e8b220f91b9ebcef06f643eb8b [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "fdd80359005c575b1852cbfa86449f44ed7e88e8b220f91b9ebcef06f643eb8b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "fdd80359005c575b1852cbfa86449f44ed7e88e8b220f91b9ebcef06f643eb8b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "fdd80359005c575b1852cbfa86449f44ed7e88e8b220f91b9ebcef06f643eb8b", kill_on_drop: false }` [INFO] [stdout] fdd80359005c575b1852cbfa86449f44ed7e88e8b220f91b9ebcef06f643eb8b [INFO] running `Command { std: "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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 37b49b408ead6068731bcab748031f4e2d1781d52ff59ceaf1ae6a0eb85a312b [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "37b49b408ead6068731bcab748031f4e2d1781d52ff59ceaf1ae6a0eb85a312b", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Compiling libc v0.2.82 [INFO] [stderr] Compiling proc-macro2 v1.0.24 [INFO] [stderr] Compiling syn v1.0.58 [INFO] [stderr] Checking futures-core v0.3.12 [INFO] [stderr] Checking pin-project-lite v0.2.4 [INFO] [stderr] Checking once_cell v1.5.2 [INFO] [stderr] Checking futures-io v0.3.12 [INFO] [stderr] Compiling serde v1.0.119 [INFO] [stderr] Compiling log v0.4.13 [INFO] [stderr] Checking cache-padded v1.1.1 [INFO] [stderr] Checking fastrand v1.4.0 [INFO] [stderr] Checking event-listener v2.5.1 [INFO] [stderr] Checking parking v2.0.0 [INFO] [stderr] Checking waker-fn v1.1.0 [INFO] [stderr] Compiling const_fn v0.4.5 [INFO] [stderr] Compiling proc-macro-hack v0.5.19 [INFO] [stderr] Checking vec-arena v1.0.0 [INFO] [stderr] Compiling proc-macro-nested v0.1.7 [INFO] [stderr] Compiling serde_json v1.0.61 [INFO] [stderr] Compiling getrandom v0.2.1 [INFO] [stderr] Checking pin-utils v0.1.0 [INFO] [stderr] Checking byteorder v1.4.2 [INFO] [stderr] Checking async-task v4.0.3 [INFO] [stderr] Compiling serde_derive v1.0.119 [INFO] [stderr] Checking atomic-waker v1.0.0 [INFO] [stderr] Checking unicode-width v0.1.8 [INFO] [stderr] Compiling crossbeam-utils v0.8.1 [INFO] [stderr] Compiling memoffset v0.6.1 [INFO] [stderr] Compiling rayon v1.5.0 [INFO] [stderr] Checking lock_api v0.4.2 [INFO] [stderr] Checking futures-channel v0.3.12 [INFO] [stderr] Checking concurrent-queue v1.2.2 [INFO] [stderr] Checking futures-task v0.3.12 [INFO] [stderr] Checking async-mutex v1.4.0 [INFO] [stderr] Checking async-lock v2.3.0 [INFO] [stderr] Checking regex v1.4.3 [INFO] [stderr] Checking regex-automata v0.1.9 [INFO] [stderr] Checking textwrap v0.11.0 [INFO] [stderr] Checking spinning_top v0.2.2 [INFO] [stderr] Checking futures-lite v1.11.3 [INFO] [stderr] Checking csv-core v0.1.10 [INFO] [stderr] Checking async-channel v1.5.1 [INFO] [stderr] Checking plotters v0.2.15 [INFO] [stderr] Checking crossbeam-channel v0.4.4 [INFO] [stderr] Checking clap v2.33.3 [INFO] [stderr] Checking kv-log-macro v1.0.7 [INFO] [stderr] Compiling quote v1.0.8 [INFO] [stderr] Checking crossbeam-channel v0.5.0 [INFO] [stderr] Checking crossbeam-epoch v0.9.1 [INFO] [stderr] Checking num_cpus v1.13.0 [INFO] [stderr] Checking nb-connect v1.0.2 [INFO] [stderr] Checking polling v2.0.2 [INFO] [stderr] Checking getrandom v0.1.16 [INFO] [stderr] Checking signal-hook-registry v1.3.0 [INFO] [stderr] Checking atty v0.2.14 [INFO] [stderr] Checking blocking v1.0.2 [INFO] [stderr] Checking async-executor v1.4.0 [INFO] [stderr] Checking rand_core v0.5.1 [INFO] [stderr] Checking crossbeam-deque v0.8.0 [INFO] [stderr] Checking async-io v1.3.1 [INFO] [stderr] Checking signal-hook v0.1.17 [INFO] [stderr] Checking nanorand v0.5.2 [INFO] [stderr] Checking rand_chacha v0.2.2 [INFO] [stderr] Checking rayon-core v1.9.0 [INFO] [stderr] Checking async-process v1.0.1 [INFO] [stderr] Checking async-global-executor v2.0.2 [INFO] [stderr] Checking rand v0.7.3 [INFO] [stderr] Checking bstr v0.2.14 [INFO] [stderr] Checking serde_cbor v0.11.1 [INFO] [stderr] Checking csv v1.1.5 [INFO] [stderr] Checking tinytemplate v1.2.0 [INFO] [stderr] Compiling futures-macro v0.3.12 [INFO] [stderr] Compiling pin-project-internal v1.0.4 [INFO] [stderr] Compiling async-attributes v1.1.1 [INFO] [stderr] Checking async-std v1.9.0 [INFO] [stderr] Checking pin-project v1.0.4 [INFO] [stderr] Checking flume v0.10.2 (/opt/rustwide/workdir) [INFO] [stderr] Checking futures-util v0.3.12 [INFO] [stderr] Checking futures-executor v0.3.12 [INFO] [stderr] Checking futures v0.3.12 [INFO] [stderr] Checking criterion v0.3.3 [INFO] [stdout] warning: unused import: `RecvError` [INFO] [stdout] --> tests/array.rs:13:13 [INFO] [stdout] | [INFO] [stdout] 13 | use flume::{RecvError, RecvTimeoutError, TryRecvError}; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `RecvError` [INFO] [stdout] --> tests/list.rs:13:13 [INFO] [stdout] | [INFO] [stdout] 13 | use flume::{RecvError, RecvTimeoutError, TryRecvError}; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary braces around block return value [INFO] [stdout] --> tests/mpsc.rs:1689:34 [INFO] [stdout] | [INFO] [stdout] 1689 | _bar = rx2.recv() => { panic!() } [INFO] [stdout] | ^^^^^^^^^^^^ help: remove these braces [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_braces)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary braces around block return value [INFO] [stdout] --> tests/mpsc.rs:1693:34 [INFO] [stdout] | [INFO] [stdout] 1693 | _foo = rx1.recv() => { panic!() }, [INFO] [stdout] | ^^^^^^^^^^^^ help: remove these braces [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary braces around block return value [INFO] [stdout] --> tests/mpsc.rs:1694:33 [INFO] [stdout] | [INFO] [stdout] 1694 | bar = rx2.recv() => { assert_eq!(bar.unwrap(), 2) } [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary braces around block return value [INFO] [stdout] --> tests/mpsc.rs:1699:34 [INFO] [stdout] | [INFO] [stdout] 1699 | _bar = rx2.recv() => { panic!() } [INFO] [stdout] | ^^^^^^^^^^^^ help: remove these braces [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary braces around block return value [INFO] [stdout] --> tests/mpsc.rs:1716:34 [INFO] [stdout] | [INFO] [stdout] 1716 | _foo = rx1.recv() => { panic!("1") }, [INFO] [stdout] | ^^^^^^^^^^^^^^^ help: remove these braces [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary braces around block return value [INFO] [stdout] --> tests/mpsc.rs:1717:34 [INFO] [stdout] | [INFO] [stdout] 1717 | _foo = rx2.recv() => { panic!("2") }, [INFO] [stdout] | ^^^^^^^^^^^^^^^ help: remove these braces [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary braces around block return value [INFO] [stdout] --> tests/mpsc.rs:1718:34 [INFO] [stdout] | [INFO] [stdout] 1718 | _foo = rx3.recv() => { panic!("3") }, [INFO] [stdout] | ^^^^^^^^^^^^^^^ help: remove these braces [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary braces around block return value [INFO] [stdout] --> tests/mpsc.rs:1719:34 [INFO] [stdout] | [INFO] [stdout] 1719 | _foo = rx4.recv() => { panic!("4") }, [INFO] [stdout] | ^^^^^^^^^^^^^^^ help: remove these braces [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary braces around block return value [INFO] [stdout] --> tests/mpsc.rs:1731:33 [INFO] [stdout] | [INFO] [stdout] 1731 | _a1 = rx1.recv() => { panic!() }, [INFO] [stdout] | ^^^^^^^^^^^^ help: remove these braces [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary braces around block return value [INFO] [stdout] --> tests/mpsc.rs:1755:32 [INFO] [stdout] | [INFO] [stdout] 1755 | _b = rx2.recv() => { panic!() } [INFO] [stdout] | ^^^^^^^^^^^^ help: remove these braces [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary braces around block return value [INFO] [stdout] --> tests/mpsc.rs:1759:31 [INFO] [stdout] | [INFO] [stdout] 1759 | a = rx1.recv() => { assert!(a.is_err()) }, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary braces around block return value [INFO] [stdout] --> tests/mpsc.rs:1760:32 [INFO] [stdout] | [INFO] [stdout] 1760 | _b = rx2.recv() => { panic!() } [INFO] [stdout] | ^^^^^^^^^^^^ help: remove these braces [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `RecvError` [INFO] [stdout] --> tests/zero.rs:13:13 [INFO] [stdout] | [INFO] [stdout] 13 | use flume::{RecvError, RecvTimeoutError, TryRecvError}; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `item` [INFO] [stdout] --> tests/stream.rs:248:24 [INFO] [stdout] | [INFO] [stdout] 248 | .for_each(|item| async move {}); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_item` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> tests/stream.rs:37:9 [INFO] [stdout] | [INFO] [stdout] 37 | tx.send(42); [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 12 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1m 10s [INFO] running `Command { std: "docker" "inspect" "37b49b408ead6068731bcab748031f4e2d1781d52ff59ceaf1ae6a0eb85a312b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "37b49b408ead6068731bcab748031f4e2d1781d52ff59ceaf1ae6a0eb85a312b", kill_on_drop: false }` [INFO] [stdout] 37b49b408ead6068731bcab748031f4e2d1781d52ff59ceaf1ae6a0eb85a312b