[INFO] fetching crate ntex-bytes 0.1.4...
[INFO] testing ntex-bytes-0.1.4 against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] extracting crate ntex-bytes 0.1.4 into /workspace/builds/worker-55/source
[INFO] validating manifest of crates.io crate ntex-bytes 0.1.4 on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ntex-bytes 0.1.4
[INFO] finished tweaking crates.io crate ntex-bytes 0.1.4
[INFO] tweaked toml for crates.io crate ntex-bytes 0.1.4 written to /workspace/builds/worker-55/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "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-55/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2ff7976926fa793f479d6c2abfc16da1fe570af361cfc9dab65c8484b226333f
[INFO] running `Command { std: "docker" "start" "-a" "2ff7976926fa793f479d6c2abfc16da1fe570af361cfc9dab65c8484b226333f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2ff7976926fa793f479d6c2abfc16da1fe570af361cfc9dab65c8484b226333f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ff7976926fa793f479d6c2abfc16da1fe570af361cfc9dab65c8484b226333f", kill_on_drop: false }`
[INFO] [stdout] 2ff7976926fa793f479d6c2abfc16da1fe570af361cfc9dab65c8484b226333f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5efa81e4d735ff4a70aaeeb447236a9ca04358413282a98e088bc6e18ab4684e
[INFO] running `Command { std: "docker" "start" "-a" "5efa81e4d735ff4a70aaeeb447236a9ca04358413282a98e088bc6e18ab4684e", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling bytes v1.1.0
[INFO] [stderr]    Compiling ntex-bytes v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] error: unused return value of `core::str::<impl str>::split_at` that must be used
[INFO] [stdout]   --> src/string.rs:96:9
[INFO] [stdout]    |
[INFO] [stdout] 96 |         self.split_at(at);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 54 |     warnings,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    = note: `#[deny(unused_must_use)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unused return value of `core::str::<impl str>::split_at` that must be used
[INFO] [stdout]    --> src/string.rs:126:9
[INFO] [stdout]     |
[INFO] [stdout] 126 |         self.split_at(at);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ntex-bytes` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "5efa81e4d735ff4a70aaeeb447236a9ca04358413282a98e088bc6e18ab4684e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5efa81e4d735ff4a70aaeeb447236a9ca04358413282a98e088bc6e18ab4684e", kill_on_drop: false }`
[INFO] [stdout] 5efa81e4d735ff4a70aaeeb447236a9ca04358413282a98e088bc6e18ab4684e