[INFO] fetching crate thermal_printer 0.1.1...
[INFO] checking thermal_printer-0.1.1 against try#e0f03aec47b100bc29555561bd62a99d1bc6aca5 for pr-86231
[INFO] extracting crate thermal_printer 0.1.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate thermal_printer 0.1.1 on toolchain e0f03aec47b100bc29555561bd62a99d1bc6aca5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e0f03aec47b100bc29555561bd62a99d1bc6aca5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate thermal_printer 0.1.1
[INFO] finished tweaking crates.io crate thermal_printer 0.1.1
[INFO] tweaked toml for crates.io crate thermal_printer 0.1.1 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e0f03aec47b100bc29555561bd62a99d1bc6aca5" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e0f03aec47b100bc29555561bd62a99d1bc6aca5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serial-windows v0.4.0
[INFO] [stderr]   Downloaded ioctl-rs v0.1.6
[INFO] [stderr]   Downloaded serial v0.4.0
[INFO] [stderr]   Downloaded serial-embedded-hal v0.1.2
[INFO] [stderr]   Downloaded serial-unix v0.4.0
[INFO] [stderr]   Downloaded serial-core v0.4.0
[INFO] [stderr]   Downloaded termios v0.2.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+e0f03aec47b100bc29555561bd62a99d1bc6aca5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e4b6390b01afd7344699e5918f40d458797907cac8201f91438aed900578806e
[INFO] running `Command { std: "docker" "start" "-a" "e4b6390b01afd7344699e5918f40d458797907cac8201f91438aed900578806e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e4b6390b01afd7344699e5918f40d458797907cac8201f91438aed900578806e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4b6390b01afd7344699e5918f40d458797907cac8201f91438aed900578806e", kill_on_drop: false }`
[INFO] [stdout] e4b6390b01afd7344699e5918f40d458797907cac8201f91438aed900578806e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+e0f03aec47b100bc29555561bd62a99d1bc6aca5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6147fed05d8d4da1599b9c9a4bcef930ca66f6d0bd538949fed5ff7af15d2c22
[INFO] running `Command { std: "docker" "start" "-a" "6147fed05d8d4da1599b9c9a4bcef930ca66f6d0bd538949fed5ff7af15d2c22", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]     Checking thermal_printer v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking serial-core v0.4.0
[INFO] [stderr]     Checking termios v0.2.2
[INFO] [stderr]     Checking ioctl-rs v0.1.6
[INFO] [stderr]     Checking serial-unix v0.4.0
[INFO] [stderr]     Checking serial v0.4.0
[INFO] [stderr]     Checking serial-embedded-hal v0.1.2
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> examples/unix.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     printer.configure(11, 120, 40);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.70s
[INFO] running `Command { std: "docker" "inspect" "6147fed05d8d4da1599b9c9a4bcef930ca66f6d0bd538949fed5ff7af15d2c22", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6147fed05d8d4da1599b9c9a4bcef930ca66f6d0bd538949fed5ff7af15d2c22", kill_on_drop: false }`
[INFO] [stdout] 6147fed05d8d4da1599b9c9a4bcef930ca66f6d0bd538949fed5ff7af15d2c22