[INFO] fetching crate ringboard-server 0.12.2...
[INFO] testing ringboard-server-0.12.2 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate ringboard-server 0.12.2 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate ringboard-server 0.12.2
[INFO] finished tweaking crates.io crate ringboard-server 0.12.2
[INFO] tweaked toml for crates.io crate ringboard-server 0.12.2 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate ringboard-server 0.12.2 on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate ringboard-server 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" "+beta-2025-10-28" "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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1653e2e34c21e2498c79b3c58aeeba6888aacec0050200e7566dc8a5bf2fab2c
[INFO] running `Command { std: "docker" "start" "-a" "1653e2e34c21e2498c79b3c58aeeba6888aacec0050200e7566dc8a5bf2fab2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1653e2e34c21e2498c79b3c58aeeba6888aacec0050200e7566dc8a5bf2fab2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1653e2e34c21e2498c79b3c58aeeba6888aacec0050200e7566dc8a5bf2fab2c", kill_on_drop: false }`
[INFO] [stdout] 1653e2e34c21e2498c79b3c58aeeba6888aacec0050200e7566dc8a5bf2fab2c
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a305af6682c9c08de34726fe05f90f529e2ae1b909c42aa91e47234c9af9cf7f
[INFO] running `Command { std: "docker" "start" "-a" "a305af6682c9c08de34726fe05f90f529e2ae1b909c42aa91e47234c9af9cf7f", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.7.5
[INFO] [stderr]    Compiling regex-syntax v0.8.5
[INFO] [stderr]    Compiling radium v0.7.0
[INFO] [stderr]    Compiling rustix v1.0.8
[INFO] [stderr]    Compiling bitflags v2.9.2
[INFO] [stderr]    Compiling option-ext v0.2.0
[INFO] [stderr]    Compiling thiserror v2.0.15
[INFO] [stderr]    Compiling arrayvec v0.7.6
[INFO] [stderr]    Compiling log v0.4.27
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling io-uring v0.7.9
[INFO] [stderr]    Compiling linux-raw-sys v0.9.4
[INFO] [stderr]    Compiling is_terminal_polyfill v1.70.1
[INFO] [stderr]    Compiling wyz v0.5.1
[INFO] [stderr]    Compiling error-stack v0.5.0
[INFO] [stderr]    Compiling bytemuck v1.23.2
[INFO] [stderr]    Compiling dirs-sys v0.5.0
[INFO] [stderr]    Compiling anstream v0.6.20
[INFO] [stderr]    Compiling funty v2.0.0
[INFO] [stderr]    Compiling sd-notify v0.4.5
[INFO] [stderr]    Compiling smallvec v2.0.0-alpha.11
[INFO] [stderr]    Compiling dirs v6.0.0
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling bitvec v1.0.1
[INFO] [stderr]    Compiling aho-corasick v1.1.3
[INFO] [stderr]    Compiling regex-automata v0.4.9
[INFO] [stderr]    Compiling thiserror-impl v2.0.15
[INFO] [stderr]    Compiling bitcode_derive v0.6.7
[INFO] [stderr]    Compiling bitcode v0.6.7
[INFO] [stderr]    Compiling regex v1.11.1
[INFO] [stderr]    Compiling env_filter v0.1.3
[INFO] [stderr]    Compiling env_logger v0.11.8
[INFO] [stderr]    Compiling clipboard-history-core v0.12.2
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/clipboard-history-core-0.12.2/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![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 `clipboard-history-core` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "a305af6682c9c08de34726fe05f90f529e2ae1b909c42aa91e47234c9af9cf7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a305af6682c9c08de34726fe05f90f529e2ae1b909c42aa91e47234c9af9cf7f", kill_on_drop: false }`
[INFO] [stdout] a305af6682c9c08de34726fe05f90f529e2ae1b909c42aa91e47234c9af9cf7f