[INFO] fetching crate flat-knn 0.1.0...
[INFO] checking flat-knn-0.1.0 against 1.95.0 for pr-155915
[INFO] extracting crate flat-knn 0.1.0 into /workspace/builds/worker-1-tc1/source
[INFO] removed /workspace/builds/worker-1-tc1/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate flat-knn 0.1.0
[INFO] finished tweaking crates.io crate flat-knn 0.1.0
[INFO] tweaked toml for crates.io crate flat-knn 0.1.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate flat-knn 0.1.0 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate flat-knn 0.1.0 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ndarray-stats v0.6.0
[INFO] [stderr]   Downloaded noisy_float v0.2.0
[INFO] [stderr]   Downloaded order-stat v0.1.3
[INFO] [stderr]   Downloaded kdtree v0.7.0
[INFO] [stderr]   Downloaded linfa-nn v0.8.0
[INFO] [stderr]   Downloaded simsimd v6.5.0
[INFO] [stderr]   Downloaded rayon v1.10.0
[INFO] [stderr]   Downloaded sprs v0.11.3
[INFO] [stderr]   Downloaded cc v1.2.31
[INFO] [stderr]   Downloaded linfa v0.8.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 83c9e28084aa7ad5650119ce93c00ae9e944701ca3ae96ccf792dade13267f1f
[INFO] running `Command { std: "docker" "start" "-a" "83c9e28084aa7ad5650119ce93c00ae9e944701ca3ae96ccf792dade13267f1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "83c9e28084aa7ad5650119ce93c00ae9e944701ca3ae96ccf792dade13267f1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83c9e28084aa7ad5650119ce93c00ae9e944701ca3ae96ccf792dade13267f1f", kill_on_drop: false }`
[INFO] [stdout] 83c9e28084aa7ad5650119ce93c00ae9e944701ca3ae96ccf792dade13267f1f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4fa0fefe48e92aee599a86b46acc1ab5515c9c76dfc1e6f2350d7601b3f96bea
[INFO] running `Command { std: "docker" "start" "-a" "4fa0fefe48e92aee599a86b46acc1ab5515c9c76dfc1e6f2350d7601b3f96bea", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]    Compiling unicode-ident v1.0.18
[INFO] [stderr]    Compiling libc v0.2.174
[INFO] [stderr]     Checking cfg-if v1.0.1
[INFO] [stderr]    Compiling zerocopy v0.8.26
[INFO] [stderr]    Compiling getrandom v0.3.3
[INFO] [stderr]    Compiling matrixmultiply v0.3.10
[INFO] [stderr]    Compiling cc v1.2.31
[INFO] [stderr]     Checking approx v0.5.1
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking num-complex v0.4.6
[INFO] [stderr]    Compiling rayon-core v1.12.1
[INFO] [stderr]    Compiling thiserror v2.0.17
[INFO] [stderr]    Compiling linfa v0.8.0
[INFO] [stderr]     Checking hashbrown v0.15.4
[INFO] [stderr]     Checking itertools v0.13.0
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]     Checking ndarray v0.16.1
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]     Checking ordered-float v4.6.0
[INFO] [stderr]     Checking getrandom v0.2.16
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking indexmap v2.10.0
[INFO] [stderr]     Checking noisy_float v0.2.0
[INFO] [stderr]     Checking rand_core v0.9.3
[INFO] [stderr]     Checking order-stat v0.1.3
[INFO] [stderr]    Compiling simsimd v6.5.0
[INFO] [stderr]     Checking sprs v0.11.3
[INFO] [stderr]    Compiling zerocopy-derive v0.8.26
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]    Compiling thiserror-impl v2.0.17
[INFO] [stderr]     Checking thiserror v1.0.69
[INFO] [stderr]     Checking kdtree v0.7.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.21
[INFO] [stderr]     Checking half v2.7.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand_chacha v0.9.0
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking rand v0.9.2
[INFO] [stderr]     Checking ndarray-stats v0.6.0
[INFO] [stderr]     Checking flat-knn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(binary_heap_into_iter_sorted)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `flat-knn` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "4fa0fefe48e92aee599a86b46acc1ab5515c9c76dfc1e6f2350d7601b3f96bea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4fa0fefe48e92aee599a86b46acc1ab5515c9c76dfc1e6f2350d7601b3f96bea", kill_on_drop: false }`
[INFO] [stdout] 4fa0fefe48e92aee599a86b46acc1ab5515c9c76dfc1e6f2350d7601b3f96bea
