[INFO] fetching crate matugen 3.1.0...
[INFO] checking matugen-3.1.0 against master#61cc47e367d7be91e13bcd01e4e96e0e233d4f6d for 2025-12-16-next-solver-global
[INFO] extracting crate matugen 3.1.0 into /workspace/builds/worker-5-tc1/source
[INFO] removed /workspace/builds/worker-5-tc1/source/.cargo/config.toml
[INFO] started tweaking crates.io crate matugen 3.1.0
[INFO] finished tweaking crates.io crate matugen 3.1.0
[INFO] tweaked toml for crates.io crate matugen 3.1.0 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate matugen 3.1.0 on toolchain 61cc47e367d7be91e13bcd01e4e96e0e233d4f6d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+61cc47e367d7be91e13bcd01e4e96e0e233d4f6d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate matugen 3.1.0 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" "+61cc47e367d7be91e13bcd01e4e96e0e233d4f6d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+61cc47e367d7be91e13bcd01e4e96e0e233d4f6d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d2c55ac81788768750ed594014bc2bd79bc08013a7fbbbe91aa188e42d61bafb
[INFO] running `Command { std: "docker" "start" "-a" "d2c55ac81788768750ed594014bc2bd79bc08013a7fbbbe91aa188e42d61bafb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d2c55ac81788768750ed594014bc2bd79bc08013a7fbbbe91aa188e42d61bafb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2c55ac81788768750ed594014bc2bd79bc08013a7fbbbe91aa188e42d61bafb", kill_on_drop: false }`
[INFO] [stdout] d2c55ac81788768750ed594014bc2bd79bc08013a7fbbbe91aa188e42d61bafb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+61cc47e367d7be91e13bcd01e4e96e0e233d4f6d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7f2f8c3ad817a1f3a7cee831afe99410dc7d8054fb065d9a6dc4cd73ed4831c2
[INFO] running `Command { std: "docker" "start" "-a" "7f2f8c3ad817a1f3a7cee831afe99410dc7d8054fb065d9a6dc4cd73ed4831c2", kill_on_drop: false }`
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[INFO] [stderr]     Checking matugen v3.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `arg`
[INFO] [stdout]  --> src/util/arguments.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | use clap::{arg, ArgAction, Parser};
[INFO] [stdout]   |            ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `arg`
[INFO] [stdout]  --> src/util/arguments.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | use clap::{arg, ArgAction, Parser};
[INFO] [stdout]   |            ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 53.06s
[INFO] running `Command { std: "docker" "inspect" "7f2f8c3ad817a1f3a7cee831afe99410dc7d8054fb065d9a6dc4cd73ed4831c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f2f8c3ad817a1f3a7cee831afe99410dc7d8054fb065d9a6dc4cd73ed4831c2", kill_on_drop: false }`
[INFO] [stdout] 7f2f8c3ad817a1f3a7cee831afe99410dc7d8054fb065d9a6dc4cd73ed4831c2