[INFO] fetching crate little-stomper 0.3.0...
[INFO] checking little-stomper-0.3.0 against try#ea2bf32540662c61547071aad6cf0851a0b02f58 for pr-96376
[INFO] extracting crate little-stomper 0.3.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate little-stomper 0.3.0 on toolchain ea2bf32540662c61547071aad6cf0851a0b02f58
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ea2bf32540662c61547071aad6cf0851a0b02f58" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate little-stomper 0.3.0
[INFO] finished tweaking crates.io crate little-stomper 0.3.0
[INFO] tweaked toml for crates.io crate little-stomper 0.3.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate little-stomper 0.3.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ea2bf32540662c61547071aad6cf0851a0b02f58" "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-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+ea2bf32540662c61547071aad6cf0851a0b02f58" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 932a0c0a9ea8eb38135de3164b0dee2f7131ca8a9225d689c13129c76c71e2f6
[INFO] running `Command { std: "docker" "start" "-a" "932a0c0a9ea8eb38135de3164b0dee2f7131ca8a9225d689c13129c76c71e2f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "932a0c0a9ea8eb38135de3164b0dee2f7131ca8a9225d689c13129c76c71e2f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "932a0c0a9ea8eb38135de3164b0dee2f7131ca8a9225d689c13129c76c71e2f6", kill_on_drop: false }`
[INFO] [stdout] 932a0c0a9ea8eb38135de3164b0dee2f7131ca8a9225d689c13129c76c71e2f6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+ea2bf32540662c61547071aad6cf0851a0b02f58" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 12423ccc3ccd58a02d39137af50edc5b2d840a0686920a679d1aa2eb3fa89159
[INFO] running `Command { std: "docker" "start" "-a" "12423ccc3ccd58a02d39137af50edc5b2d840a0686920a679d1aa2eb3fa89159", kill_on_drop: false }`
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[INFO] [stderr]     Checking little-stomper v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/asynchronous/mpsc_sink.rs:17:21
[INFO] [stdout]    |
[INFO] [stdout] 17 |                     &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] 17 |                     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/asynchronous/mpsc_sink.rs:17:21
[INFO] [stdout]    |
[INFO] [stdout] 17 |                     &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] 17 |                     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 21.61s
[INFO] running `Command { std: "docker" "inspect" "12423ccc3ccd58a02d39137af50edc5b2d840a0686920a679d1aa2eb3fa89159", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12423ccc3ccd58a02d39137af50edc5b2d840a0686920a679d1aa2eb3fa89159", kill_on_drop: false }`
[INFO] [stdout] 12423ccc3ccd58a02d39137af50edc5b2d840a0686920a679d1aa2eb3fa89159