[INFO] fetching crate verco 5.5.4...
[INFO] checking verco-5.5.4 against try#3d9fdbff4f377de96b3a51174e7a64086bee9a5c for pr-81477
[INFO] extracting crate verco 5.5.4 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate verco 5.5.4 on toolchain 3d9fdbff4f377de96b3a51174e7a64086bee9a5c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate verco 5.5.4
[INFO] finished tweaking crates.io crate verco 5.5.4
[INFO] tweaked toml for crates.io crate verco 5.5.4 written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] crate crates.io crate verco 5.5.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ctrlc v3.1.6
[INFO] [stderr]   Downloaded utf8parse v0.2.0
[INFO] [stderr]   Downloaded dirs-sys-next v0.1.0
[INFO] [stderr]   Downloaded mio v0.7.0
[INFO] [stderr]   Downloaded dirs-next v1.0.1
[INFO] [stderr]   Downloaded arc-swap v0.4.7
[INFO] [stderr]   Downloaded signal-hook-registry v1.2.1
[INFO] [stderr]   Downloaded crossterm v0.17.7
[INFO] [stderr]   Downloaded nix v0.17.0
[INFO] [stderr]   Downloaded rustyline v6.2.0
[INFO] [stderr]   Downloaded ntapi v0.3.4
[INFO] [stderr]   Downloaded miow v0.3.5
[INFO] [stderr]   Downloaded crossterm_winapi v0.6.1
[INFO] [stderr]   Downloaded smallvec v1.4.2
[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:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 61e19b4b2b0d2995901281e6e57cfd6b7d5961ef1b8314ed933d0383b40a399c
[INFO] running `Command { std: "docker" "start" "-a" "61e19b4b2b0d2995901281e6e57cfd6b7d5961ef1b8314ed933d0383b40a399c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "61e19b4b2b0d2995901281e6e57cfd6b7d5961ef1b8314ed933d0383b40a399c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61e19b4b2b0d2995901281e6e57cfd6b7d5961ef1b8314ed933d0383b40a399c", kill_on_drop: false }`
[INFO] [stdout] 61e19b4b2b0d2995901281e6e57cfd6b7d5961ef1b8314ed933d0383b40a399c
[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:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a24740af95101e90f7b5d1ff6ca95d8dd0d284fe9d28e59c2e534fd5c5fa0fdc
[INFO] running `Command { std: "docker" "start" "-a" "a24740af95101e90f7b5d1ff6ca95d8dd0d284fe9d28e59c2e534fd5c5fa0fdc", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.76
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking utf8parse v0.2.0
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]     Checking signal-hook-registry v1.2.1
[INFO] [stderr]     Checking dirs-sys-next v0.1.0
[INFO] [stderr]     Checking parking_lot_core v0.7.2
[INFO] [stderr]     Checking nix v0.17.0
[INFO] [stderr]     Checking mio v0.7.0
[INFO] [stderr]     Checking dirs-next v1.0.1
[INFO] [stderr]     Checking parking_lot v0.10.2
[INFO] [stderr]     Checking signal-hook v0.1.16
[INFO] [stderr]     Checking crossterm v0.17.7
[INFO] [stderr]     Checking rustyline v6.2.0
[INFO] [stderr]     Checking ctrlc v3.1.6
[INFO] [stderr]     Checking verco v5.5.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `handle`
[INFO] [stdout]   --> src/async_process.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub handle: JoinHandle<()>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `handle`
[INFO] [stdout]   --> src/async_process.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub handle: JoinHandle<()>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[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 [unoptimized + debuginfo] target(s) in 11.36s
[INFO] running `Command { std: "docker" "inspect" "a24740af95101e90f7b5d1ff6ca95d8dd0d284fe9d28e59c2e534fd5c5fa0fdc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a24740af95101e90f7b5d1ff6ca95d8dd0d284fe9d28e59c2e534fd5c5fa0fdc", kill_on_drop: false }`
[INFO] [stdout] a24740af95101e90f7b5d1ff6ca95d8dd0d284fe9d28e59c2e534fd5c5fa0fdc