[INFO] fetching crate icentral-node-queue 0.1.0...
[INFO] checking icentral-node-queue-0.1.0 against try#723ab942d877517caf445dafde0416803ef56501 for pr-143857
[INFO] extracting crate icentral-node-queue 0.1.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate icentral-node-queue 0.1.0
[INFO] finished tweaking crates.io crate icentral-node-queue 0.1.0
[INFO] tweaked toml for crates.io crate icentral-node-queue 0.1.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate icentral-node-queue 0.1.0 on toolchain 723ab942d877517caf445dafde0416803ef56501
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+723ab942d877517caf445dafde0416803ef56501" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate icentral-node-queue 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+723ab942d877517caf445dafde0416803ef56501" "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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+723ab942d877517caf445dafde0416803ef56501" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] aa72b17fffac5b879d7c81e6163459c827fd94a0f8e1199aa319889cf3edb9a7
[INFO] running `Command { std: "docker" "start" "-a" "aa72b17fffac5b879d7c81e6163459c827fd94a0f8e1199aa319889cf3edb9a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aa72b17fffac5b879d7c81e6163459c827fd94a0f8e1199aa319889cf3edb9a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa72b17fffac5b879d7c81e6163459c827fd94a0f8e1199aa319889cf3edb9a7", kill_on_drop: false }`
[INFO] [stdout] aa72b17fffac5b879d7c81e6163459c827fd94a0f8e1199aa319889cf3edb9a7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+723ab942d877517caf445dafde0416803ef56501" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9e9e70a032699570c8c43bbf6a2a79d6663c42db7a1020088cbc3785ba7c03eb
[INFO] running `Command { std: "docker" "start" "-a" "9e9e70a032699570c8c43bbf6a2a79d6663c42db7a1020088cbc3785ba7c03eb", kill_on_drop: false }`
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[INFO] [stderr]     Checking icentral-nodeid v0.1.0
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[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/node_queue.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |         self.data.queue(n);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 64 |         let _ = self.data.queue(n);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/node_queue.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |         self.data.queue(n);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 64 |         let _ = self.data.queue(n);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 04s
[INFO] running `Command { std: "docker" "inspect" "9e9e70a032699570c8c43bbf6a2a79d6663c42db7a1020088cbc3785ba7c03eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e9e70a032699570c8c43bbf6a2a79d6663c42db7a1020088cbc3785ba7c03eb", kill_on_drop: false }`
[INFO] [stdout] 9e9e70a032699570c8c43bbf6a2a79d6663c42db7a1020088cbc3785ba7c03eb