[INFO] fetching crate hmi2mid 0.1.1...
[INFO] checking hmi2mid-0.1.1 against master#8007b506ac5da629f223b755f5a5391edd5f6d01 for pr-88041
[INFO] extracting crate hmi2mid 0.1.1 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate hmi2mid 0.1.1 on toolchain 8007b506ac5da629f223b755f5a5391edd5f6d01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate hmi2mid 0.1.1
[INFO] finished tweaking crates.io crate hmi2mid 0.1.1
[INFO] tweaked toml for crates.io crate hmi2mid 0.1.1 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate crates.io crate hmi2mid 0.1.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 386cbfd9cf61d064a312bf12a33abc2eb7fddb123fa092504fad89f69ca8fd69
[INFO] running `Command { std: "docker" "start" "-a" "386cbfd9cf61d064a312bf12a33abc2eb7fddb123fa092504fad89f69ca8fd69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "386cbfd9cf61d064a312bf12a33abc2eb7fddb123fa092504fad89f69ca8fd69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "386cbfd9cf61d064a312bf12a33abc2eb7fddb123fa092504fad89f69ca8fd69", kill_on_drop: false }`
[INFO] [stdout] 386cbfd9cf61d064a312bf12a33abc2eb7fddb123fa092504fad89f69ca8fd69
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2a6b3f0c9c4140ae0136bc2876bbc3960eb0b0661200a7316b3e2652a38fe879
[INFO] running `Command { std: "docker" "start" "-a" "2a6b3f0c9c4140ae0136bc2876bbc3960eb0b0661200a7316b3e2652a38fe879", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking hmi2mid v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/lib.rs:80:5
[INFO] [stdout]    |
[INFO] [stdout] 80 |     &out[0..4].copy_from_slice(&b"MThd"[..]);
[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] 80 |     let _ = &out[0..4].copy_from_slice(&b"MThd"[..]);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/lib.rs:81:5
[INFO] [stdout]    |
[INFO] [stdout] 81 |     &out[4..8].copy_from_slice(&0x06000000u32.to_le_bytes());
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 81 |     let _ = &out[4..8].copy_from_slice(&0x06000000u32.to_le_bytes());
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/lib.rs:85:5
[INFO] [stdout]    |
[INFO] [stdout] 85 |     &out[10..12].copy_from_slice(&ntrax.to_be_bytes());
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 85 |     let _ = &out[10..12].copy_from_slice(&ntrax.to_be_bytes());
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/lib.rs:80:5
[INFO] [stdout]    |
[INFO] [stdout] 80 |     &out[0..4].copy_from_slice(&b"MThd"[..]);
[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] 80 |     let _ = &out[0..4].copy_from_slice(&b"MThd"[..]);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/lib.rs:81:5
[INFO] [stdout]    |
[INFO] [stdout] 81 |     &out[4..8].copy_from_slice(&0x06000000u32.to_le_bytes());
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 81 |     let _ = &out[4..8].copy_from_slice(&0x06000000u32.to_le_bytes());
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/lib.rs:85:5
[INFO] [stdout]    |
[INFO] [stdout] 85 |     &out[10..12].copy_from_slice(&ntrax.to_be_bytes());
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 85 |     let _ = &out[10..12].copy_from_slice(&ntrax.to_be_bytes());
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `Command { std: "docker" "inspect" "2a6b3f0c9c4140ae0136bc2876bbc3960eb0b0661200a7316b3e2652a38fe879", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a6b3f0c9c4140ae0136bc2876bbc3960eb0b0661200a7316b3e2652a38fe879", kill_on_drop: false }`
[INFO] [stdout] 2a6b3f0c9c4140ae0136bc2876bbc3960eb0b0661200a7316b3e2652a38fe879