[INFO] fetching crate rusty_neat 0.2.3...
[INFO] testing rusty_neat-0.2.3 against 1.91.0 for beta-1.92-2
[INFO] extracting crate rusty_neat 0.2.3 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate rusty_neat 0.2.3
[INFO] finished tweaking crates.io crate rusty_neat 0.2.3
[INFO] tweaked toml for crates.io crate rusty_neat 0.2.3 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rusty_neat 0.2.3 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rusty_neat 0.2.3 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" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded svgtypes v0.13.0
[INFO] [stderr]   Downloaded unicode-ccc v0.1.2
[INFO] [stderr]   Downloaded usvg v0.37.0
[INFO] [stderr]   Downloaded rctree v0.5.0
[INFO] [stderr]   Downloaded unicode-bidi-mirroring v0.1.0
[INFO] [stderr]   Downloaded usvg-text-layout v0.37.0
[INFO] [stderr]   Downloaded usvg-tree v0.37.0
[INFO] [stderr]   Downloaded rand_core v0.9.0
[INFO] [stderr]   Downloaded lzw v0.10.0
[INFO] [stderr]   Downloaded num-derive v0.2.5
[INFO] [stderr]   Downloaded imagesize v0.12.0
[INFO] [stderr]   Downloaded gif v0.10.3
[INFO] [stderr]   Downloaded nsvg v0.5.1
[INFO] [stderr]   Downloaded zerocopy-derive v0.8.15
[INFO] [stderr]   Downloaded rand_distr v0.5.0
[INFO] [stderr]   Downloaded serde v1.0.186
[INFO] [stderr]   Downloaded toml_edit v0.22.23
[INFO] [stderr]   Downloaded image v0.19.0
[INFO] [stderr]   Downloaded serde_json v1.0.109
[INFO] [stderr]   Downloaded rustybuzz v0.12.1
[INFO] [stderr]   Downloaded jpeg-decoder v0.1.22
[INFO] [stderr]   Downloaded zerocopy v0.8.15
[INFO] [stderr]   Downloaded winnow v0.7.1
[INFO] [stderr]   Downloaded ttf-parser v0.20.0
[INFO] [stderr]   Downloaded time v0.3.40
[INFO] [stderr]   Downloaded fontdb v0.16.2
[INFO] [stderr]   Downloaded usvg-parser v0.37.0
[INFO] [stderr]   Downloaded kurbo v0.9.5
[INFO] [stderr]   Downloaded serde_derive v1.0.186
[INFO] [stderr]   Downloaded roxmltree v0.19.0
[INFO] [stderr]   Downloaded fontconfig-parser v0.5.7
[INFO] [stderr]   Downloaded num-rational v0.1.43
[INFO] [stderr]   Downloaded time-macros v0.2.21
[INFO] [stderr]   Downloaded simplesvg v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c99cee292ee5492c48b18dcc40b5a70038479da4814748537be75ec070b205ef
[INFO] running `Command { std: "docker" "start" "-a" "c99cee292ee5492c48b18dcc40b5a70038479da4814748537be75ec070b205ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c99cee292ee5492c48b18dcc40b5a70038479da4814748537be75ec070b205ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c99cee292ee5492c48b18dcc40b5a70038479da4814748537be75ec070b205ef", kill_on_drop: false }`
[INFO] [stdout] c99cee292ee5492c48b18dcc40b5a70038479da4814748537be75ec070b205ef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=warn" "-e" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 577a2bf1ab9fde5cde5ebec061edc34930aa3e5305b1133087f6c667270e1e22
[INFO] running `Command { std: "docker" "start" "-a" "577a2bf1ab9fde5cde5ebec061edc34930aa3e5305b1133087f6c667270e1e22", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.93
[INFO] [stderr]    Compiling serde v1.0.186
[INFO] [stderr]    Compiling getrandom v0.3.1
[INFO] [stderr]    Compiling zerocopy v0.8.15
[INFO] [stderr]    Compiling strsim v0.11.1
[INFO] [stderr]    Compiling libm v0.2.11
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling indexmap v2.7.1
[INFO] [stderr]    Compiling winnow v0.7.1
[INFO] [stderr]    Compiling itertools v0.14.0
[INFO] [stderr]    Compiling quote v1.0.38
[INFO] [stderr]    Compiling syn v2.0.98
[INFO] [stderr]    Compiling rand_core v0.9.0
[INFO] [stderr]    Compiling darling_core v0.20.10
[INFO] [stderr]    Compiling serde_derive v1.0.186
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]    Compiling zerocopy v0.7.35
[INFO] [stderr]    Compiling ppv-lite86 v0.2.20
[INFO] [stderr]    Compiling darling_macro v0.20.10
[INFO] [stderr]    Compiling rand_chacha v0.9.0
[INFO] [stderr]    Compiling rand v0.9.0
[INFO] [stderr]    Compiling darling v0.20.10
[INFO] [stderr]    Compiling serde_with_macros v3.12.0
[INFO] [stderr]    Compiling rand_distr v0.5.0
[INFO] [stderr]    Compiling toml_datetime v0.6.8
[INFO] [stderr]    Compiling serde_spanned v0.6.8
[INFO] [stderr]    Compiling serde_with v3.12.0
[INFO] [stderr]    Compiling toml_edit v0.22.23
[INFO] [stderr]    Compiling toml v0.8.20
[INFO] [stderr]    Compiling rusty_neat v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(extract_if)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `extract_if` has been stable since 1.87.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(extract_if)]
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rusty_neat` (lib) due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "577a2bf1ab9fde5cde5ebec061edc34930aa3e5305b1133087f6c667270e1e22", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "577a2bf1ab9fde5cde5ebec061edc34930aa3e5305b1133087f6c667270e1e22", kill_on_drop: false }`
[INFO] [stdout] 577a2bf1ab9fde5cde5ebec061edc34930aa3e5305b1133087f6c667270e1e22