[INFO] fetching crate monocle 0.6.1...
[INFO] checking monocle-0.6.1 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] extracting crate monocle 0.6.1 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate monocle 0.6.1 on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate monocle 0.6.1
[INFO] finished tweaking crates.io crate monocle 0.6.1
[INFO] tweaked toml for crates.io crate monocle 0.6.1 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate crates.io crate monocle 0.6.1 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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7e74f670dabcd37ad347c43b1d41f74dc60ae3b33a683707b8a7a0b04e6962ea
[INFO] running `Command { std: "docker" "start" "-a" "7e74f670dabcd37ad347c43b1d41f74dc60ae3b33a683707b8a7a0b04e6962ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7e74f670dabcd37ad347c43b1d41f74dc60ae3b33a683707b8a7a0b04e6962ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e74f670dabcd37ad347c43b1d41f74dc60ae3b33a683707b8a7a0b04e6962ea", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "5cca74907cabed340196ff46253901448e45f8d6af5d7ccf792bb4792430945c", kill_on_drop: false }`
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[INFO] [stdout] warning: unused return value of `std::hint::must_use` that must be used
[INFO] [stdout]    --> src/bin/monocle.rs:718:29
[INFO] [stdout]     |
[INFO] [stdout] 718 | / ...                   format!(
[INFO] [stdout] 719 | | ...                       "{}|{}|{}|{}|{}|{}",
[INFO] [stdout] 720 | | ...                       entry.asn,
[INFO] [stdout] 721 | | ...                       entry.as_name,
[INFO] [stdout] ...   |
[INFO] [stdout] 725 | | ...                       entry.org_size
[INFO] [stdout] 726 | | ...                   );
[INFO] [stdout]     | |_______________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `format` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::hint::must_use` that must be used
[INFO] [stdout]    --> src/bin/monocle.rs:718:29
[INFO] [stdout]     |
[INFO] [stdout] 718 | / ...                   format!(
[INFO] [stdout] 719 | | ...                       "{}|{}|{}|{}|{}|{}",
[INFO] [stdout] 720 | | ...                       entry.asn,
[INFO] [stdout] 721 | | ...                       entry.as_name,
[INFO] [stdout] ...   |
[INFO] [stdout] 725 | | ...                       entry.org_size
[INFO] [stdout] 726 | | ...                   );
[INFO] [stdout]     | |_______________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `format` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 52.62s
[INFO] running `Command { std: "docker" "inspect" "5cca74907cabed340196ff46253901448e45f8d6af5d7ccf792bb4792430945c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5cca74907cabed340196ff46253901448e45f8d6af5d7ccf792bb4792430945c", kill_on_drop: false }`
[INFO] [stdout] 5cca74907cabed340196ff46253901448e45f8d6af5d7ccf792bb4792430945c