[INFO] fetching crate sender-sink 0.2.1...
[INFO] testing sender-sink-0.2.1 against master#ec6f9a5b4413f74386267ef8efc93712c2ce6db6 for pr-155739-1
[INFO] extracting crate sender-sink 0.2.1 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate sender-sink 0.2.1
[INFO] finished tweaking crates.io crate sender-sink 0.2.1
[INFO] tweaked toml for crates.io crate sender-sink 0.2.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate sender-sink 0.2.1 on toolchain ec6f9a5b4413f74386267ef8efc93712c2ce6db6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 16 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2c4a5bce553a19090c955eab6c9dfed4ded7174afca3d7ac99314dd9c03a4a61
[INFO] running `Command { std: "docker" "start" "-a" "2c4a5bce553a19090c955eab6c9dfed4ded7174afca3d7ac99314dd9c03a4a61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2c4a5bce553a19090c955eab6c9dfed4ded7174afca3d7ac99314dd9c03a4a61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c4a5bce553a19090c955eab6c9dfed4ded7174afca3d7ac99314dd9c03a4a61", kill_on_drop: false }`
[INFO] [stdout] 2c4a5bce553a19090c955eab6c9dfed4ded7174afca3d7ac99314dd9c03a4a61
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 654db3745c970f730814b725be1d9cb93c71de984577de728d6886ef6579ce94
[INFO] running `Command { std: "docker" "start" "-a" "654db3745c970f730814b725be1d9cb93c71de984577de728d6886ef6579ce94", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures-core v0.3.32
[INFO] [stderr]    Compiling slab v0.4.12
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling futures-channel v0.3.32
[INFO] [stderr]    Compiling futures-util v0.3.32
[INFO] [stderr]    Compiling tokio-macros v2.7.0
[INFO] [stderr]    Compiling futures v0.3.32
[INFO] [stderr]    Compiling tokio v1.52.3
[INFO] [stderr]    Compiling sender-sink v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/wrappers/mpsc_sink.rs:22:21
[INFO] [stdout]    |
[INFO] [stdout] 22 |                     drop(&self.sender.take());
[INFO] [stdout]    |                     ^^^^^-------------------^
[INFO] [stdout]    |                          |
[INFO] [stdout]    |                          argument has type `&Option<tokio::sync::mpsc::UnboundedSender<T>>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 22 -                     drop(&self.sender.take());
[INFO] [stdout] 22 +                     let _ = &self.sender.take();
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.13s
[INFO] running `Command { std: "docker" "inspect" "654db3745c970f730814b725be1d9cb93c71de984577de728d6886ef6579ce94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "654db3745c970f730814b725be1d9cb93c71de984577de728d6886ef6579ce94", kill_on_drop: false }`
[INFO] [stdout] 654db3745c970f730814b725be1d9cb93c71de984577de728d6886ef6579ce94
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3efde7268db35fdc47ef59fe2cd6cd283d5fccac1c96b657551cc580c0d05105
[INFO] running `Command { std: "docker" "start" "-a" "3efde7268db35fdc47ef59fe2cd6cd283d5fccac1c96b657551cc580c0d05105", kill_on_drop: false }`
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/wrappers/mpsc_sink.rs:22:21
[INFO] [stdout]    |
[INFO] [stdout] 22 |                     drop(&self.sender.take());
[INFO] [stdout]    |                     ^^^^^-------------------^
[INFO] [stdout]    |                          |
[INFO] [stdout]    |                          argument has type `&Option<tokio::sync::mpsc::UnboundedSender<T>>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 22 -                     drop(&self.sender.take());
[INFO] [stdout] 22 +                     let _ = &self.sender.take();
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling sender-sink v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/wrappers/mpsc_sink.rs:22:21
[INFO] [stdout]    |
[INFO] [stdout] 22 |                     drop(&self.sender.take());
[INFO] [stdout]    |                     ^^^^^-------------------^
[INFO] [stdout]    |                          |
[INFO] [stdout]    |                          argument has type `&Option<tokio::sync::mpsc::UnboundedSender<T>>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 22 -                     drop(&self.sender.take());
[INFO] [stdout] 22 +                     let _ = &self.sender.take();
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.65s
[INFO] running `Command { std: "docker" "inspect" "3efde7268db35fdc47ef59fe2cd6cd283d5fccac1c96b657551cc580c0d05105", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3efde7268db35fdc47ef59fe2cd6cd283d5fccac1c96b657551cc580c0d05105", kill_on_drop: false }`
[INFO] [stdout] 3efde7268db35fdc47ef59fe2cd6cd283d5fccac1c96b657551cc580c0d05105
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 861f11c6fa9301d394f5d685a85f826c0f1fa4b9a02d08f48d840e261cf388cc
[INFO] running `Command { std: "docker" "start" "-a" "861f11c6fa9301d394f5d685a85f826c0f1fa4b9a02d08f48d840e261cf388cc", kill_on_drop: false }`
[INFO] [stderr] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stderr]   --> src/wrappers/mpsc_sink.rs:22:21
[INFO] [stderr]    |
[INFO] [stderr] 22 |                     drop(&self.sender.take());
[INFO] [stderr]    |                     ^^^^^-------------------^
[INFO] [stderr]    |                          |
[INFO] [stderr]    |                          argument has type `&Option<tokio::sync::mpsc::UnboundedSender<T>>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dropping_references)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]    |
[INFO] [stderr] 22 -                     drop(&self.sender.take());
[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` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/sender_sink-9896ee0f77f28672)
[INFO] [stderr]    Doc-tests sender_sink
[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_sends_multiple_times ... ok
[INFO] [stdout] test wrappers::mpsc_sink::test::it_sends_to_the_sender ... ok
[INFO] [stdout] test wrappers::mpsc_sink::test::it_fails_if_receiver_closed ... 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] [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" "861f11c6fa9301d394f5d685a85f826c0f1fa4b9a02d08f48d840e261cf388cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "861f11c6fa9301d394f5d685a85f826c0f1fa4b9a02d08f48d840e261cf388cc", kill_on_drop: false }`
[INFO] [stdout] 861f11c6fa9301d394f5d685a85f826c0f1fa4b9a02d08f48d840e261cf388cc
