[INFO] fetching crate dstr 0.1.5...
[INFO] testing dstr-0.1.5 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate dstr 0.1.5 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate dstr 0.1.5
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate dstr 0.1.5
[INFO] tweaked toml for crates.io crate dstr 0.1.5 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate dstr 0.1.5 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] crate crates.io crate dstr 0.1.5 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-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-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] 207e88d46fa42bf371e6afe831973ab53026ea0a875587b45c38fd2d81d6e796
[INFO] running `Command { std: "docker" "start" "-a" "207e88d46fa42bf371e6afe831973ab53026ea0a875587b45c38fd2d81d6e796", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "207e88d46fa42bf371e6afe831973ab53026ea0a875587b45c38fd2d81d6e796", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "207e88d46fa42bf371e6afe831973ab53026ea0a875587b45c38fd2d81d6e796", kill_on_drop: false }`
[INFO] [stdout] 207e88d46fa42bf371e6afe831973ab53026ea0a875587b45c38fd2d81d6e796
[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] 3dc3e73c9fd83f7a821503c2fd1071d060168f795448bb1d90f469f54dc3e9b7
[INFO] running `Command { std: "docker" "start" "-a" "3dc3e73c9fd83f7a821503c2fd1071d060168f795448bb1d90f469f54dc3e9b7", kill_on_drop: false }`
[INFO] [stderr]    Compiling aok v0.1.17
[INFO] [stderr]    Compiling dstr v0.1.5 (/opt/rustwide/workdir)
[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(doc_cfg)]
[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 `dstr` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "3dc3e73c9fd83f7a821503c2fd1071d060168f795448bb1d90f469f54dc3e9b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3dc3e73c9fd83f7a821503c2fd1071d060168f795448bb1d90f469f54dc3e9b7", kill_on_drop: false }`
[INFO] [stdout] 3dc3e73c9fd83f7a821503c2fd1071d060168f795448bb1d90f469f54dc3e9b7