[INFO] fetching crate ringboard 0.12.2...
[INFO] testing ringboard-0.12.2 against 1.91.0 for beta-1.92-2
[INFO] extracting crate ringboard 0.12.2 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate ringboard 0.12.2
[INFO] finished tweaking crates.io crate ringboard 0.12.2
[INFO] tweaked toml for crates.io crate ringboard 0.12.2 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate ringboard 0.12.2 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate ringboard 0.12.2 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" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded terminal_size v0.4.3
[INFO] [stderr]   Downloaded toml v0.9.5
[INFO] [stderr]   Downloaded darling_macro v0.21.2
[INFO] [stderr]   Downloaded cvt v0.1.2
[INFO] [stderr]   Downloaded as-slice v0.2.1
[INFO] [stderr]   Downloaded base64-serde v0.8.0
[INFO] [stderr]   Downloaded rand_distr v0.5.1
[INFO] [stderr]   Downloaded ask-cli v0.3.0
[INFO] [stderr]   Downloaded clap-num v1.2.0
[INFO] [stderr]   Downloaded rand_xoshiro v0.7.0
[INFO] [stderr]   Downloaded aligned v0.4.2
[INFO] [stderr]   Downloaded fuc_engine v3.1.1
[INFO] [stderr]   Downloaded supercilex-tests v0.4.21
[INFO] [stderr]   Downloaded clap_derive v4.5.45
[INFO] [stderr]   Downloaded remove_dir_all v1.0.0
[INFO] [stderr]   Downloaded smallvec v2.0.0-alpha.11
[INFO] [stderr]   Downloaded darling v0.21.2
[INFO] [stderr]   Downloaded clap v4.5.45
[INFO] [stderr]   Downloaded darling_core v0.21.2
[INFO] [stderr]   Downloaded error-stack v0.5.0
[INFO] [stderr]   Downloaded bon-macros v3.7.1
[INFO] [stderr]   Downloaded clap_builder v4.5.44
[INFO] [stderr]   Downloaded bon v3.7.1
[INFO] [stderr]   Downloaded fs_at v0.2.1
[INFO] [stderr]   Downloaded normpath v1.3.0
[INFO] [stderr]   Downloaded serde_spanned v1.0.0
[INFO] [stderr]   Downloaded toml_datetime v0.7.0
[INFO] [stderr]   Downloaded quick-xml v0.38.2
[INFO] [stderr]   Downloaded toml_writer v1.0.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5aded6033bbe59f39a3720f734d59bade18509688604a0afb200ac8c7b87722e
[INFO] running `Command { std: "docker" "start" "-a" "5aded6033bbe59f39a3720f734d59bade18509688604a0afb200ac8c7b87722e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5aded6033bbe59f39a3720f734d59bade18509688604a0afb200ac8c7b87722e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5aded6033bbe59f39a3720f734d59bade18509688604a0afb200ac8c7b87722e", kill_on_drop: false }`
[INFO] [stdout] 5aded6033bbe59f39a3720f734d59bade18509688604a0afb200ac8c7b87722e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0bdb2222fd5b45909c28dd227f077ff3ae17661732a72858ab44b19bce14227e
[INFO] running `Command { std: "docker" "start" "-a" "0bdb2222fd5b45909c28dd227f077ff3ae17661732a72858ab44b19bce14227e", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v1.0.26
[INFO] [stderr]    Compiling rustix v1.0.8
[INFO] [stderr]    Compiling bitflags v2.9.2
[INFO] [stderr]    Compiling linux-raw-sys v0.9.4
[INFO] [stderr]    Compiling libc v0.2.175
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling memchr v2.7.5
[INFO] [stderr]    Compiling rustversion v1.0.22
[INFO] [stderr]    Compiling prettyplease v0.2.37
[INFO] [stderr]    Compiling crossbeam-utils v0.8.21
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling thiserror v2.0.15
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling anstyle v1.0.11
[INFO] [stderr]    Compiling rand_core v0.9.3
[INFO] [stderr]    Compiling mime_guess v2.0.5
[INFO] [stderr]    Compiling serde_json v1.0.143
[INFO] [stderr]    Compiling clap_lex v0.7.5
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling anstream v0.6.20
[INFO] [stderr]    Compiling rand v0.9.2
[INFO] [stderr]    Compiling smallvec v2.0.0-alpha.11
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling toml_writer v1.0.2
[INFO] [stderr]    Compiling rand_xoshiro v0.7.0
[INFO] [stderr]    Compiling base64-serde v0.8.0
[INFO] [stderr]    Compiling rustc_version v0.4.1
[INFO] [stderr]    Compiling ask-cli v0.3.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/ask-cli-0.3.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(read_buf)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/ask-cli-0.3.0/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(core_io_borrowed_buf)]
[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 `ask-cli` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "0bdb2222fd5b45909c28dd227f077ff3ae17661732a72858ab44b19bce14227e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0bdb2222fd5b45909c28dd227f077ff3ae17661732a72858ab44b19bce14227e", kill_on_drop: false }`
[INFO] [stdout] 0bdb2222fd5b45909c28dd227f077ff3ae17661732a72858ab44b19bce14227e
