[INFO] fetching crate capricorn 0.1.93...
[INFO] checking capricorn-0.1.93 against 4d7c0cd298ace72490220301fa543d63a154f8ce for pr-164789
[INFO] extracting crate capricorn 0.1.93 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate capricorn 0.1.93
[INFO] finished tweaking crates.io crate capricorn 0.1.93
[INFO] tweaked toml for crates.io crate capricorn 0.1.93 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate capricorn 0.1.93 on toolchain 4d7c0cd298ace72490220301fa543d63a154f8ce
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4d7c0cd298ace72490220301fa543d63a154f8ce" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4d7c0cd298ace72490220301fa543d63a154f8ce" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 166 packages to highest compatible versions
[INFO] [stderr]       Adding criterion v0.3.6 (available: v0.8.2)
[INFO] [stderr]       Adding serde_yaml v0.8.26 (available: v0.9.34+deprecated)
[INFO] [stderr]       Adding tendril v0.4.3 (available: v0.5.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4d7c0cd298ace72490220301fa543d63a154f8ce" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:c0af3998e971868164375a7dfb646c9933ddd1a3bdb00fa2041266763dc1eeab" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 6d7c4b686ebe78911008ea8a7ed58e767be6168c990d7bb61169de9324dbbb14
[INFO] running `Command { std: "docker" "start" "6d7c4b686ebe78911008ea8a7ed58e767be6168c990d7bb61169de9324dbbb14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6d7c4b686ebe78911008ea8a7ed58e767be6168c990d7bb61169de9324dbbb14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "6d7c4b686ebe78911008ea8a7ed58e767be6168c990d7bb61169de9324dbbb14" "/opt/rustwide/cargo-home/bin/cargo" "+4d7c0cd298ace72490220301fa543d63a154f8ce" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6d7c4b686ebe78911008ea8a7ed58e767be6168c990d7bb61169de9324dbbb14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "6d7c4b686ebe78911008ea8a7ed58e767be6168c990d7bb61169de9324dbbb14" "/opt/rustwide/cargo-home/bin/cargo" "+4d7c0cd298ace72490220301fa543d63a154f8ce" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.191
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling syn v1.0.109
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[INFO] [stderr]    Compiling serde_derive v1.0.229
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[INFO] [stderr]    Compiling cssparser-macros v0.6.1
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[INFO] [stderr]    Compiling cssparser v0.27.2
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[INFO] [stderr]    Compiling ppv-lite86 v0.2.21
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[INFO] [stderr]     Checking backtrace v0.3.77
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]    Compiling phf_generator v0.8.0
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[INFO] [stderr]    Compiling phf_macros v0.8.0
[INFO] [stderr]     Checking exitfailure v0.5.1
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[INFO] [stderr]    Compiling markup5ever v0.10.1
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[INFO] [stderr]     Checking nipper v0.1.9
[INFO] [stderr]     Checking capricorn v0.1.93 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `Box::<T>::new` that must be used
[INFO] [stdout]   --> benches/benchmark.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     Box::new(parse::parse_html(&v, &html));
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let _ = Box::new(parse::parse_html(&v, &html));
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 44.15s
[INFO] running `Command { std: "docker" "inspect" "6d7c4b686ebe78911008ea8a7ed58e767be6168c990d7bb61169de9324dbbb14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d7c4b686ebe78911008ea8a7ed58e767be6168c990d7bb61169de9324dbbb14", kill_on_drop: false }`
[INFO] [stdout] 6d7c4b686ebe78911008ea8a7ed58e767be6168c990d7bb61169de9324dbbb14
