[INFO] fetching crate captain-hook 0.2.2...
[INFO] checking captain-hook-0.2.2 against master#8c32e313cccf7df531e2d49ffb8227bb92304aee for pr-145608-1
[INFO] extracting crate captain-hook 0.2.2 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate captain-hook 0.2.2
[INFO] finished tweaking crates.io crate captain-hook 0.2.2
[INFO] tweaked toml for crates.io crate captain-hook 0.2.2 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate captain-hook 0.2.2 on toolchain 8c32e313cccf7df531e2d49ffb8227bb92304aee
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate captain-hook 0.2.2 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" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b8c48535b0c54a6f3d961ed5544dfc6ac7b13e9737c4179fd7e7667d482e1bc5
[INFO] running `Command { std: "docker" "start" "-a" "b8c48535b0c54a6f3d961ed5544dfc6ac7b13e9737c4179fd7e7667d482e1bc5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b8c48535b0c54a6f3d961ed5544dfc6ac7b13e9737c4179fd7e7667d482e1bc5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8c48535b0c54a6f3d961ed5544dfc6ac7b13e9737c4179fd7e7667d482e1bc5", kill_on_drop: false }`
[INFO] [stdout] b8c48535b0c54a6f3d961ed5544dfc6ac7b13e9737c4179fd7e7667d482e1bc5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4b007eaee9a60450bf6ec2615c2c9b3033702ed79fb1a58a8ef959bfb6d6527e
[INFO] running `Command { std: "docker" "start" "-a" "4b007eaee9a60450bf6ec2615c2c9b3033702ed79fb1a58a8ef959bfb6d6527e", kill_on_drop: false }`
[INFO] [stderr]     Checking captain-hook v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/error.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Io(io::Error),
[INFO] [stdout]   |     -- ^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 5 -     Io(io::Error),
[INFO] [stdout] 5 +     Io(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/error.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Io(io::Error),
[INFO] [stdout]   |     -- ^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 5 -     Io(io::Error),
[INFO] [stdout] 5 +     Io(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.33s
[INFO] running `Command { std: "docker" "inspect" "4b007eaee9a60450bf6ec2615c2c9b3033702ed79fb1a58a8ef959bfb6d6527e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b007eaee9a60450bf6ec2615c2c9b3033702ed79fb1a58a8ef959bfb6d6527e", kill_on_drop: false }`
[INFO] [stdout] 4b007eaee9a60450bf6ec2615c2c9b3033702ed79fb1a58a8ef959bfb6d6527e