[INFO] fetching crate poulpy-backend 0.2.1...
[INFO] testing poulpy-backend-0.2.1 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate poulpy-backend 0.2.1 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate poulpy-backend 0.2.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate poulpy-backend 0.2.1
[INFO] tweaked toml for crates.io crate poulpy-backend 0.2.1 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate poulpy-backend 0.2.1 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate poulpy-backend 0.2.1 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" "+beta-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8b83c213e6865e54c669649793bb1b0e89d7254b26f448b37e187ecc1c95cf62
[INFO] running `Command { std: "docker" "start" "-a" "8b83c213e6865e54c669649793bb1b0e89d7254b26f448b37e187ecc1c95cf62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8b83c213e6865e54c669649793bb1b0e89d7254b26f448b37e187ecc1c95cf62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b83c213e6865e54c669649793bb1b0e89d7254b26f448b37e187ecc1c95cf62", kill_on_drop: false }`
[INFO] [stdout] 8b83c213e6865e54c669649793bb1b0e89d7254b26f448b37e187ecc1c95cf62
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7db1c0c6807aa47d39c163dc9f3647ccfd7572f9cfdc64b15bc723682671eced
[INFO] running `Command { std: "docker" "start" "-a" "7db1c0c6807aa47d39c163dc9f3647ccfd7572f9cfdc64b15bc723682671eced", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.92
[INFO] [stderr]    Compiling libc v0.2.167
[INFO] [stderr]    Compiling getrandom v0.3.2
[INFO] [stderr]    Compiling serde_json v1.0.133
[INFO] [stderr]    Compiling gmp-mpfr-sys v1.6.4
[INFO] [stderr]    Compiling libm v0.2.11
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling regex-syntax v0.8.5
[INFO] [stderr]    Compiling plotters-backend v0.3.7
[INFO] [stderr]    Compiling itoa v1.0.14
[INFO] [stderr]    Compiling clap_builder v4.5.23
[INFO] [stderr]    Compiling itertools v0.13.0
[INFO] [stderr]    Compiling cc v1.2.31
[INFO] [stderr]    Compiling cast v0.3.0
[INFO] [stderr]    Compiling rug v1.27.0
[INFO] [stderr]    Compiling rayon v1.10.0
[INFO] [stderr]    Compiling anes v0.1.6
[INFO] [stderr]    Compiling oorandom v11.1.4
[INFO] [stderr]    Compiling itertools v0.14.0
[INFO] [stderr]    Compiling bytemuck v1.23.2
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.96
[INFO] [stderr]    Compiling plotters-svg v0.3.7
[INFO] [stderr]    Compiling plotters v0.3.7
[INFO] [stderr]    Compiling regex-automata v0.4.9
[INFO] [stderr]    Compiling rand_core v0.9.3
[INFO] [stderr]    Compiling criterion-plot v0.6.0
[INFO] [stderr]    Compiling clap v4.5.23
[INFO] [stderr]    Compiling cmake v0.1.54
[INFO] [stderr]    Compiling poulpy-backend v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]    Compiling regex v1.11.1
[INFO] [stderr]    Compiling zerocopy v0.7.35
[INFO] [stderr]    Compiling ppv-lite86 v0.2.20
[INFO] [stderr]    Compiling rand_chacha v0.9.0
[INFO] [stderr]    Compiling rand v0.9.1
[INFO] [stderr]    Compiling rand_distr v0.5.1
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling ciborium v0.2.2
[INFO] [stderr]    Compiling tinytemplate v1.2.1
[INFO] [stderr]    Compiling criterion v0.7.0
[INFO] [stderr]    Compiling poulpy-hal v0.2.1
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/poulpy-hal-0.2.1/src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(trait_alias)]
[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 `poulpy-hal` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "7db1c0c6807aa47d39c163dc9f3647ccfd7572f9cfdc64b15bc723682671eced", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7db1c0c6807aa47d39c163dc9f3647ccfd7572f9cfdc64b15bc723682671eced", kill_on_drop: false }`
[INFO] [stdout] 7db1c0c6807aa47d39c163dc9f3647ccfd7572f9cfdc64b15bc723682671eced