[INFO] fetching crate python-mod 1.0.0...
[INFO] testing python-mod-1.0.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate python-mod 1.0.0 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate python-mod 1.0.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate python-mod 1.0.0
[INFO] tweaked toml for crates.io crate python-mod 1.0.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate python-mod 1.0.0 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 python-mod 1.0.0 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-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 68f9be4ab9464da92841f74eef3e1055423264cbc175e183d4750e7163d112ca
[INFO] running `Command { std: "docker" "start" "-a" "68f9be4ab9464da92841f74eef3e1055423264cbc175e183d4750e7163d112ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "68f9be4ab9464da92841f74eef3e1055423264cbc175e183d4750e7163d112ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68f9be4ab9464da92841f74eef3e1055423264cbc175e183d4750e7163d112ca", kill_on_drop: false }`
[INFO] [stdout] 68f9be4ab9464da92841f74eef3e1055423264cbc175e183d4750e7163d112ca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 594a7f3faf97e266f3be935b95eb5c10798ba9bf5aa8dd72a8bad8aea9cfeb30
[INFO] running `Command { std: "docker" "start" "-a" "594a7f3faf97e266f3be935b95eb5c10798ba9bf5aa8dd72a8bad8aea9cfeb30", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]    Compiling once_cell v1.21.3
[INFO] [stderr]    Compiling encoding_index_tests v0.1.4
[INFO] [stderr]    Compiling memchr v2.7.5
[INFO] [stderr]    Compiling target-lexicon v0.13.2
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling libc v0.2.174
[INFO] [stderr]    Compiling regex-syntax v0.8.5
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling memoffset v0.9.1
[INFO] [stderr]    Compiling utf8parse v0.2.2
[INFO] [stderr]    Compiling anstyle-parse v0.2.7
[INFO] [stderr]    Compiling pyo3-build-config v0.25.1
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling anstyle v1.0.11
[INFO] [stderr]    Compiling aho-corasick v1.1.3
[INFO] [stderr]    Compiling colorchoice v1.0.4
[INFO] [stderr]    Compiling is_terminal_polyfill v1.70.1
[INFO] [stderr]    Compiling anstyle-query v1.1.3
[INFO] [stderr]    Compiling log v0.4.27
[INFO] [stderr]    Compiling anstream v0.6.19
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling jiff v0.2.15
[INFO] [stderr]    Compiling indoc v2.0.6
[INFO] [stderr]    Compiling unindent v0.2.4
[INFO] [stderr]    Compiling num-bigint v0.4.6
[INFO] [stderr]    Compiling thiserror v2.0.12
[INFO] [stderr]    Compiling encoding-index-simpchinese v1.20141219.5
[INFO] [stderr]    Compiling pyo3-ffi v0.25.1
[INFO] [stderr]    Compiling pyo3-macros-backend v0.25.1
[INFO] [stderr]    Compiling regex-automata v0.4.9
[INFO] [stderr]    Compiling pyo3 v0.25.1
[INFO] [stderr]    Compiling encoding-index-singlebyte v1.20141219.5
[INFO] [stderr]    Compiling encoding-index-tradchinese v1.20141219.5
[INFO] [stderr]    Compiling encoding-index-korean v1.20141219.5
[INFO] [stderr]    Compiling encoding-index-japanese v1.20141219.5
[INFO] [stderr]    Compiling iter-read v1.1.0
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling encoding v0.2.33
[INFO] [stderr]    Compiling to_tokenstream v0.1.3
[INFO] [stderr]    Compiling litrs v0.5.1
[INFO] [stderr]    Compiling path_macro v1.0.0
[INFO] [stderr]    Compiling regex v1.11.1
[INFO] [stderr]    Compiling env_filter v0.1.3
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling test-log-macros v0.2.18
[INFO] [stderr]    Compiling thiserror-impl v2.0.12
[INFO] [stderr]    Compiling num-derive v0.4.2
[INFO] [stderr]    Compiling env_logger v0.11.8
[INFO] [stderr]    Compiling test-log v0.2.18
[INFO] [stderr]    Compiling pyo3-macros v0.25.1
[INFO] [stderr]    Compiling serde-pickle v1.2.0
[INFO] [stderr]    Compiling pythonize v0.25.0
[INFO] [stderr]    Compiling python-ast v1.0.0
[INFO] [stderr]    Compiling python-mod v1.0.0 (/opt/rustwide/workdir)
[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(proc_macro_span)]
[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-mod` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "594a7f3faf97e266f3be935b95eb5c10798ba9bf5aa8dd72a8bad8aea9cfeb30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "594a7f3faf97e266f3be935b95eb5c10798ba9bf5aa8dd72a8bad8aea9cfeb30", kill_on_drop: false }`
[INFO] [stdout] 594a7f3faf97e266f3be935b95eb5c10798ba9bf5aa8dd72a8bad8aea9cfeb30