[INFO] fetching crate contracts 0.6.2...
[INFO] checking contracts-0.6.2 against beta-2021-10-15 for beta-1.56-3
[INFO] extracting crate contracts 0.6.2 into /workspace/builds/worker-54/source
[INFO] validating manifest of crates.io crate contracts 0.6.2 on toolchain beta-2021-10-15
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate contracts 0.6.2
[INFO] finished tweaking crates.io crate contracts 0.6.2
[INFO] tweaked toml for crates.io crate contracts 0.6.2 written to /workspace/builds/worker-54/source/Cargo.toml
[INFO] crate crates.io crate contracts 0.6.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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" "+beta-2021-10-15" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a05d01861de571f11822b426db87900e45f7a074d973f2f79610f614b4fc271e
[INFO] running `Command { std: "docker" "start" "-a" "a05d01861de571f11822b426db87900e45f7a074d973f2f79610f614b4fc271e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a05d01861de571f11822b426db87900e45f7a074d973f2f79610f614b4fc271e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a05d01861de571f11822b426db87900e45f7a074d973f2f79610f614b4fc271e", kill_on_drop: false }`
[INFO] [stdout] a05d01861de571f11822b426db87900e45f7a074d973f2f79610f614b4fc271e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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" "+beta-2021-10-15" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 752cf01275751fdecb65af62bfb8c0123c64541cd97b6d59b5f8cfba1a0d29a2
[INFO] running `Command { std: "docker" "start" "-a" "752cf01275751fdecb65af62bfb8c0123c64541cd97b6d59b5f8cfba1a0d29a2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling syn v1.0.50
[INFO] [stderr]     Checking unicode-xid v0.2.1
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking contracts v0.6.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> tests/implication.rs:56:18
[INFO] [stdout]    |
[INFO] [stdout] 56 |     fn only_true(t: bool) -> bool {
[INFO] [stdout]    |                  ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> tests/functions.rs:121:18
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn impl_test(x: isize) -> impl Clone + PartialEq + std::fmt::Debug {
[INFO] [stdout]     |                  ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 30.29s
[INFO] running `Command { std: "docker" "inspect" "752cf01275751fdecb65af62bfb8c0123c64541cd97b6d59b5f8cfba1a0d29a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "752cf01275751fdecb65af62bfb8c0123c64541cd97b6d59b5f8cfba1a0d29a2", kill_on_drop: false }`
[INFO] [stdout] 752cf01275751fdecb65af62bfb8c0123c64541cd97b6d59b5f8cfba1a0d29a2
