[INFO] fetching crate thin-vec 0.2.2...
[INFO] checking thin-vec-0.2.2 against try#3d9fdbff4f377de96b3a51174e7a64086bee9a5c for pr-81477
[INFO] extracting crate thin-vec 0.2.2 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate thin-vec 0.2.2 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 thin-vec 0.2.2
[INFO] finished tweaking crates.io crate thin-vec 0.2.2
[INFO] tweaked toml for crates.io crate thin-vec 0.2.2 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 42f3f1919ae3200ec0a99eab791f3e9bbe4f0799b8948d0ce5af7a36c13ebed1
[INFO] running `Command { std: "docker" "start" "-a" "42f3f1919ae3200ec0a99eab791f3e9bbe4f0799b8948d0ce5af7a36c13ebed1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "42f3f1919ae3200ec0a99eab791f3e9bbe4f0799b8948d0ce5af7a36c13ebed1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42f3f1919ae3200ec0a99eab791f3e9bbe4f0799b8948d0ce5af7a36c13ebed1", kill_on_drop: false }`
[INFO] [stdout] 42f3f1919ae3200ec0a99eab791f3e9bbe4f0799b8948d0ce5af7a36c13ebed1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 48d7b31c45af57fc11998cb9fbd99ca615947988136a4845a697b9a598729699
[INFO] running `Command { std: "docker" "start" "-a" "48d7b31c45af57fc11998cb9fbd99ca615947988136a4845a697b9a598729699", kill_on_drop: false }`
[INFO] [stderr]     Checking thin-vec v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/lib.rs:1810:9
[INFO] [stdout]      |
[INFO] [stdout] 1810 |         &x[!0..];
[INFO] [stdout]      |         ^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/lib.rs:1817:9
[INFO] [stdout]      |
[INFO] [stdout] 1817 |         &x[..6];
[INFO] [stdout]      |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/lib.rs:1824:9
[INFO] [stdout]      |
[INFO] [stdout] 1824 |         &x[!0..4];
[INFO] [stdout]      |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/lib.rs:1831:9
[INFO] [stdout]      |
[INFO] [stdout] 1831 |         &x[1..6];
[INFO] [stdout]      |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/lib.rs:1838:9
[INFO] [stdout]      |
[INFO] [stdout] 1838 |         &x[3..2];
[INFO] [stdout]      |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `Command { std: "docker" "inspect" "48d7b31c45af57fc11998cb9fbd99ca615947988136a4845a697b9a598729699", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48d7b31c45af57fc11998cb9fbd99ca615947988136a4845a697b9a598729699", kill_on_drop: false }`
[INFO] [stdout] 48d7b31c45af57fc11998cb9fbd99ca615947988136a4845a697b9a598729699