[INFO] fetching crate iocutil 0.1.3...
[INFO] checking iocutil-0.1.3 against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] extracting crate iocutil 0.1.3 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate iocutil 0.1.3 on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate iocutil 0.1.3
[INFO] finished tweaking crates.io crate iocutil 0.1.3
[INFO] tweaked toml for crates.io crate iocutil 0.1.3 written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] crate crates.io crate iocutil 0.1.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "5ce49795f38ad7f9c059cb7e5dce3208830dcb66c8cd0548ab4826521d4e2b3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5ce49795f38ad7f9c059cb7e5dce3208830dcb66c8cd0548ab4826521d4e2b3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ce49795f38ad7f9c059cb7e5dce3208830dcb66c8cd0548ab4826521d4e2b3a", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "0820c3376449bd2884f3ecb37a5d1f64cadfa07117dea0a7376cd8d2f084877f", kill_on_drop: false }`
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[INFO] [stdout] warning: unused variable: `a1`
[INFO] [stdout]  --> examples/hash.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let a1 = SampleHash::new("d41d8cd98f00b204e9800998ecf8427e").unwrap();
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_a1`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 00s
[INFO] running `Command { std: "docker" "inspect" "0820c3376449bd2884f3ecb37a5d1f64cadfa07117dea0a7376cd8d2f084877f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0820c3376449bd2884f3ecb37a5d1f64cadfa07117dea0a7376cd8d2f084877f", kill_on_drop: false }`
[INFO] [stdout] 0820c3376449bd2884f3ecb37a5d1f64cadfa07117dea0a7376cd8d2f084877f