[INFO] fetching crate seam 0.4.3...
[INFO] testing seam-0.4.3 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate seam 0.4.3 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate seam 0.4.3
[INFO] finished tweaking crates.io crate seam 0.4.3
[INFO] tweaked toml for crates.io crate seam 0.4.3 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate seam 0.4.3 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 seam 0.4.3 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 1542391e4234c2002c13787bbed97fa0b6369a4e85562d3087053ba9ea2a3091
[INFO] running `Command { std: "docker" "start" "-a" "1542391e4234c2002c13787bbed97fa0b6369a4e85562d3087053ba9ea2a3091", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1542391e4234c2002c13787bbed97fa0b6369a4e85562d3087053ba9ea2a3091", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1542391e4234c2002c13787bbed97fa0b6369a4e85562d3087053ba9ea2a3091", kill_on_drop: false }`
[INFO] [stdout] 1542391e4234c2002c13787bbed97fa0b6369a4e85562d3087053ba9ea2a3091
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 2cf6f921a3b8509d2674a61099f52338854939fae9eb2111d4fa9003d70b149f
[INFO] running `Command { std: "docker" "start" "-a" "2cf6f921a3b8509d2674a61099f52338854939fae9eb2111d4fa9003d70b149f", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.215
[INFO] [stderr]    Compiling ahash v0.8.11
[INFO] [stderr]    Compiling once_cell v1.20.2
[INFO] [stderr]    Compiling zerocopy v0.7.35
[INFO] [stderr]    Compiling memchr v2.7.4
[INFO] [stderr]    Compiling typenum v1.17.0
[INFO] [stderr]    Compiling az v1.2.1
[INFO] [stderr]    Compiling fixed v1.28.0
[INFO] [stderr]    Compiling winnow v0.6.20
[INFO] [stderr]    Compiling encoding_rs v0.8.35
[INFO] [stderr]    Compiling indexmap v2.7.0
[INFO] [stderr]    Compiling half v2.4.1
[INFO] [stderr]    Compiling unicode-id v0.3.5
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling bytemuck v1.20.0
[INFO] [stderr]    Compiling colored v2.1.0
[INFO] [stderr]    Compiling chrono v0.4.38
[INFO] [stderr]    Compiling unicode-width v0.2.0
[INFO] [stderr]    Compiling markdown v1.0.0-alpha.21
[INFO] [stderr]    Compiling descape v2.0.3
[INFO] [stderr]    Compiling formatx v0.2.2
[INFO] [stderr]    Compiling glob v0.3.1
[INFO] [stderr]    Compiling syn v2.0.89
[INFO] [stderr]    Compiling aho-corasick v1.1.3
[INFO] [stderr]    Compiling hashbrown v0.14.5
[INFO] [stderr]    Compiling hashlink v0.9.1
[INFO] [stderr]    Compiling yaml-rust2 v0.9.0
[INFO] [stderr]    Compiling regex-automata v0.4.9
[INFO] [stderr]    Compiling serde_spanned v0.6.8
[INFO] [stderr]    Compiling toml_datetime v0.6.8
[INFO] [stderr]    Compiling toml_edit v0.22.22
[INFO] [stderr]    Compiling seam_argparse_proc_macro v0.1.1
[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/seam_argparse_proc_macro-0.1.1/src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(proc_macro_span)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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/seam_argparse_proc_macro-0.1.1/src/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(proc_macro_diagnostic)]
[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 `seam_argparse_proc_macro` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "2cf6f921a3b8509d2674a61099f52338854939fae9eb2111d4fa9003d70b149f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2cf6f921a3b8509d2674a61099f52338854939fae9eb2111d4fa9003d70b149f", kill_on_drop: false }`
[INFO] [stdout] 2cf6f921a3b8509d2674a61099f52338854939fae9eb2111d4fa9003d70b149f
