[INFO] fetching crate thin-vec 0.2.3...
[INFO] checking thin-vec-0.2.3 against try#8de4b308b608cded0ebccf658a0fc719bce87d4e for pr-89056
[INFO] extracting crate thin-vec 0.2.3 into /workspace/builds/worker-48/source
[INFO] validating manifest of crates.io crate thin-vec 0.2.3 on toolchain 8de4b308b608cded0ebccf658a0fc719bce87d4e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate thin-vec 0.2.3
[INFO] finished tweaking crates.io crate thin-vec 0.2.3
[INFO] tweaked toml for crates.io crate thin-vec 0.2.3 written to /workspace/builds/worker-48/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/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" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 13608f2ca02d6aff731c43c39166690fd079ba85dcea5f965d850cec6938e0a8
[INFO] running `Command { std: "docker" "start" "-a" "13608f2ca02d6aff731c43c39166690fd079ba85dcea5f965d850cec6938e0a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "13608f2ca02d6aff731c43c39166690fd079ba85dcea5f965d850cec6938e0a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13608f2ca02d6aff731c43c39166690fd079ba85dcea5f965d850cec6938e0a8", kill_on_drop: false }`
[INFO] [stdout] 13608f2ca02d6aff731c43c39166690fd079ba85dcea5f965d850cec6938e0a8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6db0cbc0976e3a1ec0ef270bd9ae36dedbd9e96c8fb495529ce7be2f4ddf5bcc
[INFO] running `Command { std: "docker" "start" "-a" "6db0cbc0976e3a1ec0ef270bd9ae36dedbd9e96c8fb495529ce7be2f4ddf5bcc", kill_on_drop: false }`
[INFO] [stderr]     Checking thin-vec v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/lib.rs:1811:9
[INFO] [stdout]      |
[INFO] [stdout] 1811 |         &x[!0..];
[INFO] [stdout]      |         ^^^^^^^^ the borrow produces a value
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1811 |         let _ = &x[!0..];
[INFO] [stdout]      |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/lib.rs:1818:9
[INFO] [stdout]      |
[INFO] [stdout] 1818 |         &x[..6];
[INFO] [stdout]      |         ^^^^^^^ the borrow produces a value
[INFO] [stdout]      |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1818 |         let _ = &x[..6];
[INFO] [stdout]      |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/lib.rs:1825:9
[INFO] [stdout]      |
[INFO] [stdout] 1825 |         &x[!0..4];
[INFO] [stdout]      |         ^^^^^^^^^ the borrow produces a value
[INFO] [stdout]      |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1825 |         let _ = &x[!0..4];
[INFO] [stdout]      |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/lib.rs:1832:9
[INFO] [stdout]      |
[INFO] [stdout] 1832 |         &x[1..6];
[INFO] [stdout]      |         ^^^^^^^^ the borrow produces a value
[INFO] [stdout]      |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1832 |         let _ = &x[1..6];
[INFO] [stdout]      |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/lib.rs:1839:9
[INFO] [stdout]      |
[INFO] [stdout] 1839 |         &x[3..2];
[INFO] [stdout]      |         ^^^^^^^^ the borrow produces a value
[INFO] [stdout]      |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1839 |         let _ = &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 0.98s
[INFO] running `Command { std: "docker" "inspect" "6db0cbc0976e3a1ec0ef270bd9ae36dedbd9e96c8fb495529ce7be2f4ddf5bcc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6db0cbc0976e3a1ec0ef270bd9ae36dedbd9e96c8fb495529ce7be2f4ddf5bcc", kill_on_drop: false }`
[INFO] [stdout] 6db0cbc0976e3a1ec0ef270bd9ae36dedbd9e96c8fb495529ce7be2f4ddf5bcc