[INFO] fetching crate uwl 0.6.0...
[INFO] testing uwl-0.6.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate uwl 0.6.0 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate uwl 0.6.0
[INFO] finished tweaking crates.io crate uwl 0.6.0
[INFO] tweaked toml for crates.io crate uwl 0.6.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate uwl 0.6.0 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ffbd8b03a01043e89f0b8a3cfba1b5eb928b2ce0b0dad2a58b8632f1b4cd70a9
[INFO] running `Command { std: "docker" "start" "-a" "ffbd8b03a01043e89f0b8a3cfba1b5eb928b2ce0b0dad2a58b8632f1b4cd70a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ffbd8b03a01043e89f0b8a3cfba1b5eb928b2ce0b0dad2a58b8632f1b4cd70a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ffbd8b03a01043e89f0b8a3cfba1b5eb928b2ce0b0dad2a58b8632f1b4cd70a9", kill_on_drop: false }`
[INFO] [stdout] ffbd8b03a01043e89f0b8a3cfba1b5eb928b2ce0b0dad2a58b8632f1b4cd70a9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7859c50082568430c46aa1e5d5c63ad7581fdaf0e7b819c100ab074fb6725ec8
[INFO] running `Command { std: "docker" "start" "-a" "7859c50082568430c46aa1e5d5c63ad7581fdaf0e7b819c100ab074fb6725ec8", kill_on_drop: false }`
[INFO] [stderr]    Compiling uwl v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.22s
[INFO] running `Command { std: "docker" "inspect" "7859c50082568430c46aa1e5d5c63ad7581fdaf0e7b819c100ab074fb6725ec8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7859c50082568430c46aa1e5d5c63ad7581fdaf0e7b819c100ab074fb6725ec8", kill_on_drop: false }`
[INFO] [stdout] 7859c50082568430c46aa1e5d5c63ad7581fdaf0e7b819c100ab074fb6725ec8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ffa50a883766ee6af15bbec0225e26339693aa8091ab64ee014d31b52265e6a6
[INFO] running `Command { std: "docker" "start" "-a" "ffa50a883766ee6af15bbec0225e26339693aa8091ab64ee014d31b52265e6a6", kill_on_drop: false }`
[INFO] [stderr]    Compiling uwl v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:90:19
[INFO] [stdout]    |
[INFO] [stdout] 90 | #![cfg_attr(test, feature(test))]
[INFO] [stdout]    |                   ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `uwl` (lib test) due to 1 previous error
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "ffa50a883766ee6af15bbec0225e26339693aa8091ab64ee014d31b52265e6a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ffa50a883766ee6af15bbec0225e26339693aa8091ab64ee014d31b52265e6a6", kill_on_drop: false }`
[INFO] [stdout] ffa50a883766ee6af15bbec0225e26339693aa8091ab64ee014d31b52265e6a6
