[INFO] fetching crate corroded_drone 0.1.7...
[INFO] checking corroded_drone-0.1.7 against 1.55.0 for beta-1.56-3
[INFO] extracting crate corroded_drone 0.1.7 into /workspace/builds/worker-59/source
[INFO] validating manifest of crates.io crate corroded_drone 0.1.7 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate corroded_drone 0.1.7
[INFO] finished tweaking crates.io crate corroded_drone 0.1.7
[INFO] tweaked toml for crates.io crate corroded_drone 0.1.7 written to /workspace/builds/worker-59/source/Cargo.toml
[INFO] crate crates.io crate corroded_drone 0.1.7 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 518370d33be3a2a75422d337661e5299af901f685da6d38dbb5d6ef1bc609b16
[INFO] running `Command { std: "docker" "start" "-a" "518370d33be3a2a75422d337661e5299af901f685da6d38dbb5d6ef1bc609b16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "518370d33be3a2a75422d337661e5299af901f685da6d38dbb5d6ef1bc609b16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "518370d33be3a2a75422d337661e5299af901f685da6d38dbb5d6ef1bc609b16", kill_on_drop: false }`
[INFO] [stdout] 518370d33be3a2a75422d337661e5299af901f685da6d38dbb5d6ef1bc609b16
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aecae23cd1257d9a0e576e82a2596221a9b03740ae4f977e607e798765a00689
[INFO] running `Command { std: "docker" "start" "-a" "aecae23cd1257d9a0e576e82a2596221a9b03740ae4f977e607e798765a00689", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking corroded_drone v0.1.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> examples/take_off.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     drone.take_off();
[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: unused `Result` that must be used
[INFO] [stdout]   --> examples/take_off.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     drone.land();
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.56s
[INFO] running `Command { std: "docker" "inspect" "aecae23cd1257d9a0e576e82a2596221a9b03740ae4f977e607e798765a00689", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aecae23cd1257d9a0e576e82a2596221a9b03740ae4f977e607e798765a00689", kill_on_drop: false }`
[INFO] [stdout] aecae23cd1257d9a0e576e82a2596221a9b03740ae4f977e607e798765a00689
