[INFO] fetching crate sender-sink 0.2.0...
[INFO] testing sender-sink-0.2.0 against try#8262275854dc0e5381c9d42d56257d94932c5a87 for pr-90799
[INFO] extracting crate sender-sink 0.2.0 into /workspace/builds/worker-67/source
[INFO] validating manifest of crates.io crate sender-sink 0.2.0 on toolchain 8262275854dc0e5381c9d42d56257d94932c5a87
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "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-67/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "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" "+8262275854dc0e5381c9d42d56257d94932c5a87" "fetch" "--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-67/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6efefca5f68b6ef405829792f61a7288be7dd30c1d81c9199d90d0c223f8ab7b
[INFO] running `Command { std: "docker" "start" "-a" "6efefca5f68b6ef405829792f61a7288be7dd30c1d81c9199d90d0c223f8ab7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6efefca5f68b6ef405829792f61a7288be7dd30c1d81c9199d90d0c223f8ab7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6efefca5f68b6ef405829792f61a7288be7dd30c1d81c9199d90d0c223f8ab7b", kill_on_drop: false }`
[INFO] [stdout] 6efefca5f68b6ef405829792f61a7288be7dd30c1d81c9199d90d0c223f8ab7b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4fd1e414c8f3f2b415b2b5f8823593f8a3b27fe66cb7ccdabb15d0cabdc17755
[INFO] running `Command { std: "docker" "start" "-a" "4fd1e414c8f3f2b415b2b5f8823593f8a3b27fe66cb7ccdabb15d0cabdc17755", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures-core v0.3.18
[INFO] [stderr]    Compiling futures-channel v0.3.18
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling futures-task v0.3.18
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling futures-sink v0.3.18
[INFO] [stderr]    Compiling pin-project-lite v0.2.7
[INFO] [stderr]    Compiling futures-util v0.3.18
[INFO] [stderr]    Compiling futures-io v0.3.18
[INFO] [stderr]    Compiling slab v0.4.5
[INFO] [stderr]    Compiling tokio v1.14.0
[INFO] [stderr]    Compiling futures v0.3.18
[INFO] [stderr]    Compiling tokio-macros v1.6.0
[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 12.24s
[INFO] running `Command { std: "docker" "inspect" "4fd1e414c8f3f2b415b2b5f8823593f8a3b27fe66cb7ccdabb15d0cabdc17755", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4fd1e414c8f3f2b415b2b5f8823593f8a3b27fe66cb7ccdabb15d0cabdc17755", kill_on_drop: false }`
[INFO] [stdout] 4fd1e414c8f3f2b415b2b5f8823593f8a3b27fe66cb7ccdabb15d0cabdc17755
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e8b07e96dae040c9dda70e15d41f64d9114762b305198cfbf5172ae1e3e4ebd5
[INFO] running `Command { std: "docker" "start" "-a" "e8b07e96dae040c9dda70e15d41f64d9114762b305198cfbf5172ae1e3e4ebd5", kill_on_drop: false }`
[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 0.87s
[INFO] running `Command { std: "docker" "inspect" "e8b07e96dae040c9dda70e15d41f64d9114762b305198cfbf5172ae1e3e4ebd5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8b07e96dae040c9dda70e15d41f64d9114762b305198cfbf5172ae1e3e4ebd5", kill_on_drop: false }`
[INFO] [stdout] e8b07e96dae040c9dda70e15d41f64d9114762b305198cfbf5172ae1e3e4ebd5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4d640b61ca17e9946c9695d33a804363a1a2a2b0bddea306c372a5daece18995
[INFO] running `Command { std: "docker" "start" "-a" "4d640b61ca17e9946c9695d33a804363a1a2a2b0bddea306c372a5daece18995", kill_on_drop: false }`
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stdout] 
[INFO] [stderr]   --> src/wrappers/mpsc_sink.rs:22:21
[INFO] [stdout] running 4 tests
[INFO] [stderr]    |
[INFO] [stdout] test wrappers::mpsc_sink::test::it_closes_the_sender ... ok
[INFO] [stderr] 22 |                     &self.sender.take();
[INFO] [stdout] test wrappers::mpsc_sink::test::it_fails_if_receiver_closed ... ok
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout] test wrappers::mpsc_sink::test::it_sends_multiple_times ... ok
[INFO] [stderr]    |
[INFO] [stdout] test wrappers::mpsc_sink::test::it_sends_to_the_sender ... ok
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]    |
[INFO] [stdout] 
[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-3d3537a5c60111e0)
[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" "4d640b61ca17e9946c9695d33a804363a1a2a2b0bddea306c372a5daece18995", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d640b61ca17e9946c9695d33a804363a1a2a2b0bddea306c372a5daece18995", kill_on_drop: false }`
[INFO] [stdout] 4d640b61ca17e9946c9695d33a804363a1a2a2b0bddea306c372a5daece18995