[INFO] fetching crate into_string 2.0.0...
[INFO] testing into_string-2.0.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate into_string 2.0.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate into_string 2.0.0
[INFO] finished tweaking crates.io crate into_string 2.0.0
[INFO] tweaked toml for crates.io crate into_string 2.0.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate into_string 2.0.0 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 1 package to latest compatible version
[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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 20dd2396170dd9e5cb6523f521e0f4226b3680e3d30d0039428af9db3cd67f88
[INFO] running `Command { std: "docker" "start" "-a" "20dd2396170dd9e5cb6523f521e0f4226b3680e3d30d0039428af9db3cd67f88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "20dd2396170dd9e5cb6523f521e0f4226b3680e3d30d0039428af9db3cd67f88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "20dd2396170dd9e5cb6523f521e0f4226b3680e3d30d0039428af9db3cd67f88", kill_on_drop: false }`
[INFO] [stdout] 20dd2396170dd9e5cb6523f521e0f4226b3680e3d30d0039428af9db3cd67f88
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 9d292549ca565e86ee89e32ac0fa260abc7fcd7ee0dddbe8590e6fcce20a3c13
[INFO] running `Command { std: "docker" "start" "-a" "9d292549ca565e86ee89e32ac0fa260abc7fcd7ee0dddbe8590e6fcce20a3c13", kill_on_drop: false }`
[INFO] [stderr]    Compiling into_string v2.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:4:35
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![cfg_attr(not(feature = "max"), feature(min_specialization))]
[INFO] [stdout]   |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(box_into_inner)]
[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 `into_string` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "9d292549ca565e86ee89e32ac0fa260abc7fcd7ee0dddbe8590e6fcce20a3c13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d292549ca565e86ee89e32ac0fa260abc7fcd7ee0dddbe8590e6fcce20a3c13", kill_on_drop: false }`
[INFO] [stdout] 9d292549ca565e86ee89e32ac0fa260abc7fcd7ee0dddbe8590e6fcce20a3c13
