[INFO] fetching crate roster 0.1.4...
[INFO] testing roster-0.1.4 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate roster 0.1.4 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate roster 0.1.4
[INFO] finished tweaking crates.io crate roster 0.1.4
[INFO] tweaked toml for crates.io crate roster 0.1.4 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate roster 0.1.4 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 roster 0.1.4 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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] b6e3a13551d8299bd37b92e25ea2cc7c02cff2221662a686f7de094e520b761c
[INFO] running `Command { std: "docker" "start" "-a" "b6e3a13551d8299bd37b92e25ea2cc7c02cff2221662a686f7de094e520b761c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b6e3a13551d8299bd37b92e25ea2cc7c02cff2221662a686f7de094e520b761c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6e3a13551d8299bd37b92e25ea2cc7c02cff2221662a686f7de094e520b761c", kill_on_drop: false }`
[INFO] [stdout] b6e3a13551d8299bd37b92e25ea2cc7c02cff2221662a686f7de094e520b761c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 7d8e041e5fb66b3d60caece2f337cd53960c124d917560ef86a3b48b45012b64
[INFO] running `Command { std: "docker" "start" "-a" "7d8e041e5fb66b3d60caece2f337cd53960c124d917560ef86a3b48b45012b64", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling serde v1.0.196
[INFO] [stderr]    Compiling memchr v2.7.1
[INFO] [stderr]    Compiling futures-sink v0.3.30
[INFO] [stderr]    Compiling thiserror v1.0.57
[INFO] [stderr]    Compiling futures-core v0.3.30
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]    Compiling futures-task v0.3.30
[INFO] [stderr]    Compiling pkg-config v0.3.30
[INFO] [stderr]    Compiling ucd-trie v0.1.6
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]    Compiling futures-io v0.3.30
[INFO] [stderr]    Compiling memoffset v0.7.1
[INFO] [stderr]    Compiling log v0.4.20
[INFO] [stderr]    Compiling serde_json v1.0.113
[INFO] [stderr]    Compiling futures-channel v0.3.30
[INFO] [stderr]    Compiling indexmap v2.2.3
[INFO] [stderr]    Compiling hashbrown v0.13.2
[INFO] [stderr]    Compiling winnow v0.6.1
[INFO] [stderr]    Compiling async-trait v0.1.77
[INFO] [stderr]    Compiling zstd-safe v7.0.0
[INFO] [stderr]    Compiling iana-time-zone v0.1.60
[INFO] [stderr]    Compiling regex-syntax v0.8.2
[INFO] [stderr]    Compiling io-uring v0.6.3
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling spin v0.9.8
[INFO] [stderr]    Compiling anyhow v1.0.79
[INFO] [stderr]    Compiling bytes v1.5.0
[INFO] [stderr]    Compiling linked-hash-map v0.5.6
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling convert_case v0.6.0
[INFO] [stderr]    Compiling fxhash v0.2.1
[INFO] [stderr]    Compiling tracing-log v0.2.0
[INFO] [stderr]    Compiling thread_local v1.1.7
[INFO] [stderr]    Compiling sharded_queue v2.0.1
[INFO] [stderr]    Compiling yaml-rust v0.4.5
[INFO] [stderr]    Compiling jobserver v0.1.28
[INFO] [stderr]    Compiling getrandom v0.2.12
[INFO] [stderr]    Compiling non_blocking_mutex v3.1.3
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]    Compiling tokio v1.36.0
[INFO] [stderr]    Compiling smallvec v1.13.1
[INFO] [stderr]    Compiling pathdiff v0.2.1
[INFO] [stderr]    Compiling cc v1.0.83
[INFO] [stderr]    Compiling crc-catalog v2.4.0
[INFO] [stderr]    Compiling const-random-macro v0.1.16
[INFO] [stderr]    Compiling chrono v0.4.34
[INFO] [stderr]    Compiling scc v2.0.16
[INFO] [stderr]    Compiling crc v3.0.1
[INFO] [stderr]    Compiling dotenv v0.15.0
[INFO] [stderr]    Compiling atoi_simd v0.15.6
[INFO] [stderr]    Compiling bytestring v1.3.1
[INFO] [stderr]    Compiling const-random v0.1.17
[INFO] [stderr]    Compiling dlv-list v0.5.2
[INFO] [stderr]    Compiling ordered-multimap v0.6.0
[INFO] [stderr]    Compiling regex-automata v0.4.5
[INFO] [stderr]    Compiling zstd-sys v2.0.9+zstd.1.5.5
[INFO] [stderr]    Compiling futures-locks v0.7.1
[INFO] [stderr]    Compiling rust-ini v0.19.0
[INFO] [stderr]    Compiling num_cpus v1.16.0
[INFO] [stderr]    Compiling socket2 v0.5.5
[INFO] [stderr]    Compiling nix v0.26.4
[INFO] [stderr]    Compiling nanorand v0.7.0
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling threadpool v1.8.1
[INFO] [stderr]    Compiling mio v0.8.10
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling roster v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling coarsetime v0.1.34
[INFO] [stderr]    Compiling flume v0.11.0
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling regex v1.10.3
[INFO] [stderr]    Compiling darling_core v0.20.6
[INFO] [stderr]    Compiling serde_derive v1.0.196
[INFO] [stderr]    Compiling thiserror-impl v1.0.57
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]    Compiling auto-const-array v0.2.1
[INFO] [stderr]    Compiling monoio-macros v0.1.0
[INFO] [stderr]    Compiling async-recursion v1.0.5
[INFO] [stderr]    Compiling zstd v0.13.0
[INFO] [stderr]    Compiling futures-util v0.3.30
[INFO] [stderr]    Compiling tracing v0.1.40
[INFO] [stderr]    Compiling monoio v0.2.2
[INFO] [stderr]    Compiling pest v2.7.7
[INFO] [stderr]    Compiling darling_macro v0.20.6
[INFO] [stderr]    Compiling darling v0.20.6
[INFO] [stderr]    Compiling derive_builder_core v0.20.0
[INFO] [stderr]    Compiling pest_meta v2.7.7
[INFO] [stderr]    Compiling derive_builder_macro v0.20.0
[INFO] [stderr]    Compiling pest_generator v2.7.7
[INFO] [stderr]    Compiling derive_builder v0.20.0
[INFO] [stderr]    Compiling pest_derive v2.7.7
[INFO] [stderr]    Compiling futures-executor v0.3.30
[INFO] [stderr]    Compiling local-sync v0.1.1
[INFO] [stderr]    Compiling futures v0.3.30
[INFO] [stderr]    Compiling sharded-thread v1.3.1
[INFO] [stderr]    Compiling toml_datetime v0.6.5
[INFO] [stderr]    Compiling serde_spanned v0.6.5
[INFO] [stderr]    Compiling bitflags v2.4.2
[INFO] [stderr]    Compiling tracing-serde v0.1.3
[INFO] [stderr]    Compiling json5 v0.4.1
[INFO] [stderr]    Compiling toml_edit v0.22.5
[INFO] [stderr]    Compiling ron v0.8.1
[INFO] [stderr]    Compiling tracing-subscriber v0.3.18
[INFO] [stderr]    Compiling toml v0.8.10
[INFO] [stderr]    Compiling config v0.14.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(negative_impls)]
[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 `roster` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "7d8e041e5fb66b3d60caece2f337cd53960c124d917560ef86a3b48b45012b64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d8e041e5fb66b3d60caece2f337cd53960c124d917560ef86a3b48b45012b64", kill_on_drop: false }`
[INFO] [stdout] 7d8e041e5fb66b3d60caece2f337cd53960c124d917560ef86a3b48b45012b64