[INFO] fetching crate sender-sink 0.2.0...
[INFO] testing sender-sink-0.2.0 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate sender-sink 0.2.0 into /workspace/builds/worker-107/source
[INFO] validating manifest of crates.io crate sender-sink 0.2.0 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate sender-sink 0.2.0
[INFO] finished tweaking crates.io crate sender-sink 0.2.0
[INFO] tweaked toml for crates.io crate sender-sink 0.2.0 written to /workspace/builds/worker-107/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a42e8d8181e06bdea2c8626605fbf6b38ac4fe517b1723fa00dead8804c9218c
[INFO] running `Command { std: "docker" "start" "-a" "a42e8d8181e06bdea2c8626605fbf6b38ac4fe517b1723fa00dead8804c9218c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a42e8d8181e06bdea2c8626605fbf6b38ac4fe517b1723fa00dead8804c9218c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a42e8d8181e06bdea2c8626605fbf6b38ac4fe517b1723fa00dead8804c9218c", kill_on_drop: false }`
[INFO] [stdout] a42e8d8181e06bdea2c8626605fbf6b38ac4fe517b1723fa00dead8804c9218c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5ecf535b0a16ea83e182731ac9e66143266322207a994adc2ebaf9a67d9d9309
[INFO] running `Command { std: "docker" "start" "-a" "5ecf535b0a16ea83e182731ac9e66143266322207a994adc2ebaf9a67d9d9309", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling futures-task v0.3.21
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling futures-channel v0.3.21
[INFO] [stderr]    Compiling pin-project-lite v0.2.8
[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]    Compiling futures-sink v0.3.21
[INFO] [stderr]    Compiling pin-utils v0.1.0
[INFO] [stderr]    Compiling futures-io v0.3.21
[INFO] [stderr]    Compiling slab v0.4.5
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]    Compiling futures v0.3.21
[INFO] [stderr]    Compiling tokio-macros v1.7.0
[INFO] [stderr]    Compiling tokio v1.17.0
[INFO] [stderr]    Compiling sender-sink v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/wrappers/mpsc_sink.rs:22:21
[INFO] [stdout]    |
[INFO] [stdout] 22 |                     &self.sender.take();
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 22 |                     let _ = &self.sender.take();
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 23.13s
[INFO] running `Command { std: "docker" "inspect" "5ecf535b0a16ea83e182731ac9e66143266322207a994adc2ebaf9a67d9d9309", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ecf535b0a16ea83e182731ac9e66143266322207a994adc2ebaf9a67d9d9309", kill_on_drop: false }`
[INFO] [stdout] 5ecf535b0a16ea83e182731ac9e66143266322207a994adc2ebaf9a67d9d9309
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 268badfa083e8014506997f36edaf705f11495550292b36864bf7747b5c0edca
[INFO] running `Command { std: "docker" "start" "-a" "268badfa083e8014506997f36edaf705f11495550292b36864bf7747b5c0edca", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling sender-sink v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/wrappers/mpsc_sink.rs:22:21
[INFO] [stdout]    |
[INFO] [stdout] 22 |                     &self.sender.take();
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 22 |                     let _ = &self.sender.take();
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/wrappers/mpsc_sink.rs:22:21
[INFO] [stdout]    |
[INFO] [stdout] 22 |                     &self.sender.take();
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 22 |                     let _ = &self.sender.take();
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.07s
[INFO] running `Command { std: "docker" "inspect" "268badfa083e8014506997f36edaf705f11495550292b36864bf7747b5c0edca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "268badfa083e8014506997f36edaf705f11495550292b36864bf7747b5c0edca", kill_on_drop: false }`
[INFO] [stdout] 268badfa083e8014506997f36edaf705f11495550292b36864bf7747b5c0edca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] cf064f935a375b1b201037c14b43428e7b887a807c25cc3d393d25caf5a6aced
[INFO] running `Command { std: "docker" "start" "-a" "cf064f935a375b1b201037c14b43428e7b887a807c25cc3d393d25caf5a6aced", kill_on_drop: false }`
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]   --> src/wrappers/mpsc_sink.rs:22:21
[INFO] [stderr]    |
[INFO] [stderr] 22 |                     &self.sender.take();
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 22 |                     let _ = &self.sender.take();
[INFO] [stderr]    |                     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `sender-sink` (lib) generated 1 warning
[INFO] [stderr] warning: `sender-sink` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/sender_sink-760e299a806d2b07)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test wrappers::mpsc_sink::test::it_closes_the_sender ... ok
[INFO] [stdout] test wrappers::mpsc_sink::test::it_fails_if_receiver_closed ... ok
[INFO] [stdout] test wrappers::mpsc_sink::test::it_sends_to_the_sender ... ok
[INFO] [stdout] test wrappers::mpsc_sink::test::it_sends_multiple_times ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests sender-sink
[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" "cf064f935a375b1b201037c14b43428e7b887a807c25cc3d393d25caf5a6aced", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf064f935a375b1b201037c14b43428e7b887a807c25cc3d393d25caf5a6aced", kill_on_drop: false }`
[INFO] [stdout] cf064f935a375b1b201037c14b43428e7b887a807c25cc3d393d25caf5a6aced