[INFO] fetching crate nucleic-acids 0.1.0...
[INFO] testing nucleic-acids-0.1.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate nucleic-acids 0.1.0 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate nucleic-acids 0.1.0
[INFO] finished tweaking crates.io crate nucleic-acids 0.1.0
[INFO] tweaked toml for crates.io crate nucleic-acids 0.1.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate nucleic-acids 0.1.0 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]     Blocking waiting for file lock on package cache
[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] [stderr]     Blocking waiting for file lock on package cache
[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] b6d4433c375c4b795e712f210667bb72b3c854afff5c58b71fc1a3176d336e72
[INFO] running `Command { std: "docker" "start" "-a" "b6d4433c375c4b795e712f210667bb72b3c854afff5c58b71fc1a3176d336e72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b6d4433c375c4b795e712f210667bb72b3c854afff5c58b71fc1a3176d336e72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6d4433c375c4b795e712f210667bb72b3c854afff5c58b71fc1a3176d336e72", kill_on_drop: false }`
[INFO] [stdout] b6d4433c375c4b795e712f210667bb72b3c854afff5c58b71fc1a3176d336e72
[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] 4a4b167e6f5ccbe0e9a3888cf192e6e4e81a3bb179353d44f77e8460c9c5542f
[INFO] running `Command { std: "docker" "start" "-a" "4a4b167e6f5ccbe0e9a3888cf192e6e4e81a3bb179353d44f77e8460c9c5542f", kill_on_drop: false }`
[INFO] [stderr]    Compiling nucleic-acids v0.1.0 (/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(iter_array_chunks)]
[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:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(associated_type_defaults)]
[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 `nucleic-acids` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "4a4b167e6f5ccbe0e9a3888cf192e6e4e81a3bb179353d44f77e8460c9c5542f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a4b167e6f5ccbe0e9a3888cf192e6e4e81a3bb179353d44f77e8460c9c5542f", kill_on_drop: false }`
[INFO] [stdout] 4a4b167e6f5ccbe0e9a3888cf192e6e4e81a3bb179353d44f77e8460c9c5542f