[INFO] fetching crate rythonc 0.3.0...
[INFO] testing rythonc-0.3.0 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate rythonc 0.3.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate rythonc 0.3.0
[INFO] finished tweaking crates.io crate rythonc 0.3.0
[INFO] tweaked toml for crates.io crate rythonc 0.3.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rythonc 0.3.0 on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rythonc 0.3.0 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" "+beta-2025-10-28" "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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] acedc99793b28ab54190bff261c5a3d6522afd719810b011503d6eb500262f2c
[INFO] running `Command { std: "docker" "start" "-a" "acedc99793b28ab54190bff261c5a3d6522afd719810b011503d6eb500262f2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "acedc99793b28ab54190bff261c5a3d6522afd719810b011503d6eb500262f2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "acedc99793b28ab54190bff261c5a3d6522afd719810b011503d6eb500262f2c", kill_on_drop: false }`
[INFO] [stdout] acedc99793b28ab54190bff261c5a3d6522afd719810b011503d6eb500262f2c
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4803947e4ee6310706641a15c06f9dc6fe450e575aa53b237c4e10c25ba1378a
[INFO] running `Command { std: "docker" "start" "-a" "4803947e4ee6310706641a15c06f9dc6fe450e575aa53b237c4e10c25ba1378a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.82
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling autocfg v1.3.0
[INFO] [stderr]    Compiling target-lexicon v0.12.14
[INFO] [stderr]    Compiling once_cell v1.19.0
[INFO] [stderr]    Compiling memchr v2.7.2
[INFO] [stderr]    Compiling libc v0.2.154
[INFO] [stderr]    Compiling utf8parse v0.2.1
[INFO] [stderr]    Compiling encoding_index_tests v0.1.4
[INFO] [stderr]    Compiling serde v1.0.201
[INFO] [stderr]    Compiling is_terminal_polyfill v1.70.0
[INFO] [stderr]    Compiling anstyle-query v1.0.3
[INFO] [stderr]    Compiling colorchoice v1.0.1
[INFO] [stderr]    Compiling regex-syntax v0.8.3
[INFO] [stderr]    Compiling anstyle v1.0.7
[INFO] [stderr]    Compiling portable-atomic v1.6.0
[INFO] [stderr]    Compiling smallvec v1.13.2
[INFO] [stderr]    Compiling anstyle-parse v0.2.4
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling cc v1.0.97
[INFO] [stderr]    Compiling indoc v2.0.5
[INFO] [stderr]    Compiling unindent v0.2.3
[INFO] [stderr]    Compiling gimli v0.28.1
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling thiserror v1.0.60
[INFO] [stderr]    Compiling anstream v0.6.14
[INFO] [stderr]    Compiling miniz_oxide v0.7.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling encoding-index-simpchinese v1.20141219.5
[INFO] [stderr]    Compiling lock_api v0.4.12
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling memoffset v0.9.1
[INFO] [stderr]    Compiling encoding-index-japanese v1.20141219.5
[INFO] [stderr]    Compiling aho-corasick v1.1.3
[INFO] [stderr]    Compiling object v0.32.2
[INFO] [stderr]    Compiling encoding-index-korean v1.20141219.5
[INFO] [stderr]    Compiling encoding-index-tradchinese v1.20141219.5
[INFO] [stderr]    Compiling pyo3-build-config v0.21.2
[INFO] [stderr]    Compiling encoding-index-singlebyte v1.20141219.5
[INFO] [stderr]    Compiling iter-read v0.3.1
[INFO] [stderr]    Compiling clap_lex v0.7.0
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]    Compiling rustc-demangle v0.1.24
[INFO] [stderr]    Compiling syn v2.0.63
[INFO] [stderr]    Compiling anyhow v1.0.83
[INFO] [stderr]    Compiling encoding v0.2.33
[INFO] [stderr]    Compiling clap_builder v4.5.2
[INFO] [stderr]    Compiling parking_lot_core v0.9.10
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling to_tokenstream v0.1.3
[INFO] [stderr]    Compiling litrs v0.4.1
[INFO] [stderr]    Compiling backtrace v0.3.71
[INFO] [stderr]    Compiling parking_lot v0.12.2
[INFO] [stderr]    Compiling num-bigint v0.4.5
[INFO] [stderr]    Compiling fern v0.6.2
[INFO] [stderr]    Compiling wild v2.2.1
[INFO] [stderr]    Compiling rust-format v0.3.4
[INFO] [stderr]    Compiling addr2line v0.21.0
[INFO] [stderr]    Compiling regex-automata v0.4.6
[INFO] [stderr]    Compiling pyo3-ffi v0.21.2
[INFO] [stderr]    Compiling pyo3 v0.21.2
[INFO] [stderr]    Compiling regex v1.10.4
[INFO] [stderr]    Compiling pyo3-macros-backend v0.21.2
[INFO] [stderr]    Compiling env_filter v0.1.0
[INFO] [stderr]    Compiling env_logger v0.11.3
[INFO] [stderr]    Compiling serde_derive v1.0.201
[INFO] [stderr]    Compiling test-log-macros v0.2.16
[INFO] [stderr]    Compiling thiserror-impl v1.0.60
[INFO] [stderr]    Compiling num-derive v0.4.2
[INFO] [stderr]    Compiling clap_derive v4.5.4
[INFO] [stderr]    Compiling test-log v0.2.16
[INFO] [stderr]    Compiling clap v4.5.4
[INFO] [stderr]    Compiling pyo3-macros v0.21.2
[INFO] [stderr]    Compiling serde-pickle v1.1.1
[INFO] [stderr]    Compiling pythonize v0.21.1
[INFO] [stderr]    Compiling python-ast v0.3.1
[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/python-ast-0.3.1/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(strict_provenance)]
[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 `python-ast` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "4803947e4ee6310706641a15c06f9dc6fe450e575aa53b237c4e10c25ba1378a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4803947e4ee6310706641a15c06f9dc6fe450e575aa53b237c4e10c25ba1378a", kill_on_drop: false }`
[INFO] [stdout] 4803947e4ee6310706641a15c06f9dc6fe450e575aa53b237c4e10c25ba1378a