[INFO] fetching crate log4rs 1.2.0...
[INFO] checking log4rs-1.2.0 against master#e9271846294c4ee5bd7706df68180320c0b5ff20 for pr-119825
[INFO] extracting crate log4rs 1.2.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate log4rs 1.2.0 on toolchain e9271846294c4ee5bd7706df68180320c0b5ff20
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e9271846294c4ee5bd7706df68180320c0b5ff20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate log4rs 1.2.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate log4rs 1.2.0
[INFO] tweaked toml for crates.io crate log4rs 1.2.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate crates.io crate log4rs 1.2.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e9271846294c4ee5bd7706df68180320c0b5ff20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_yaml v0.8.23
[INFO] [stderr]   Downloaded arc-swap v1.5.0
[INFO] [stderr]   Downloaded thread-id v4.0.0
[INFO] [stderr]   Downloaded streaming-stats v0.2.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+e9271846294c4ee5bd7706df68180320c0b5ff20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 882f3e11b6434d01ba6991b0baee9509bda119ef613833f21684d1cc26630531
[INFO] running `Command { std: "docker" "start" "-a" "882f3e11b6434d01ba6991b0baee9509bda119ef613833f21684d1cc26630531", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "882f3e11b6434d01ba6991b0baee9509bda119ef613833f21684d1cc26630531", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "882f3e11b6434d01ba6991b0baee9509bda119ef613833f21684d1cc26630531", kill_on_drop: false }`
[INFO] [stdout] 882f3e11b6434d01ba6991b0baee9509bda119ef613833f21684d1cc26630531
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+e9271846294c4ee5bd7706df68180320c0b5ff20" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5f7ad45e833503255c427a38ee085a6fbcc9bed82b555984430950ab381fac48
[INFO] running `Command { std: "docker" "start" "-a" "5f7ad45e833503255c427a38ee085a6fbcc9bed82b555984430950ab381fac48", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.37
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling libc v0.2.124
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling lock_api v0.4.7
[INFO] [stderr]    Compiling indexmap v1.8.1
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling parking_lot_core v0.9.2
[INFO] [stderr]     Checking ryu v1.0.9
[INFO] [stderr]     Checking smallvec v1.8.0
[INFO] [stderr]    Compiling serde_json v1.0.79
[INFO] [stderr]    Compiling log v0.4.16
[INFO] [stderr]    Compiling anyhow v1.0.56
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking destructure_traitobject v0.2.0
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking linked-hash-map v0.5.4
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]     Checking unsafe-any-ors v1.0.0
[INFO] [stderr]     Checking yaml-rust v0.4.5
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking itoa v1.0.1
[INFO] [stderr]     Checking thread-id v4.0.0
[INFO] [stderr]     Checking ordered-float v2.10.0
[INFO] [stderr]     Checking typemap-ors v1.0.0
[INFO] [stderr]     Checking parking_lot v0.12.0
[INFO] [stderr]     Checking fnv v1.0.7
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[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking fastrand v1.7.0
[INFO] [stderr]     Checking log-mdc v0.1.0
[INFO] [stderr]     Checking streaming-stats v0.2.3
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking tempfile v3.3.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]     Checking thiserror v1.0.30
[INFO] [stderr]     Checking serde_yaml v0.8.23
[INFO] [stderr]     Checking serde-value v0.7.0
[INFO] [stderr]     Checking log4rs v1.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `min`, `max`, `median`, and `variance_nanos` are never read
[INFO] [stdout]    --> benches/rotation.rs:98:5
[INFO] [stdout]     |
[INFO] [stdout] 97  | struct Stats {
[INFO] [stdout]     |        ----- fields in this struct
[INFO] [stdout] 98  |     min: Duration,
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 99  |     max: Duration,
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 100 |     median: Duration,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 101 |     mean_nanos: u128,
[INFO] [stdout] 102 |     variance_nanos: f64,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Stats` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` 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 6.58s
[INFO] running `Command { std: "docker" "inspect" "5f7ad45e833503255c427a38ee085a6fbcc9bed82b555984430950ab381fac48", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f7ad45e833503255c427a38ee085a6fbcc9bed82b555984430950ab381fac48", kill_on_drop: false }`
[INFO] [stdout] 5f7ad45e833503255c427a38ee085a6fbcc9bed82b555984430950ab381fac48