[INFO] fetching crate syslog_proto 0.1.0-alpha0...
[INFO] testing syslog_proto-0.1.0-alpha0 against 1.91.0 for beta-1.92-2
[INFO] extracting crate syslog_proto 0.1.0-alpha0 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate syslog_proto 0.1.0-alpha0
[INFO] finished tweaking crates.io crate syslog_proto 0.1.0-alpha0
[INFO] tweaked toml for crates.io crate syslog_proto 0.1.0-alpha0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate syslog_proto 0.1.0-alpha0 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 syslog_proto 0.1.0-alpha0 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]  Downloading crates ...
[INFO] [stderr]   Downloaded proptest v1.8.0
[INFO] [stderr]   Downloaded heapless v0.9.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] ad508b9f0dad45e1202d00a1a53843eea29bb49b7fe80aaeb893339680ea667b
[INFO] running `Command { std: "docker" "start" "-a" "ad508b9f0dad45e1202d00a1a53843eea29bb49b7fe80aaeb893339680ea667b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ad508b9f0dad45e1202d00a1a53843eea29bb49b7fe80aaeb893339680ea667b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad508b9f0dad45e1202d00a1a53843eea29bb49b7fe80aaeb893339680ea667b", kill_on_drop: false }`
[INFO] [stdout] ad508b9f0dad45e1202d00a1a53843eea29bb49b7fe80aaeb893339680ea667b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 90a5f1d85d349bca353f6824dcfa1e945bf388c4f43fa0abb6adc96785eb3d44
[INFO] running `Command { std: "docker" "start" "-a" "90a5f1d85d349bca353f6824dcfa1e945bf388c4f43fa0abb6adc96785eb3d44", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling unicode-ident v1.0.19
[INFO] [stderr]    Compiling thiserror v2.0.17
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling heapless v0.9.1
[INFO] [stderr]    Compiling stable_deref_trait v1.2.1
[INFO] [stderr]    Compiling tap v1.0.1
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling nom v8.0.0
[INFO] [stderr]    Compiling hash32 v0.3.1
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling chrono v0.4.42
[INFO] [stderr]    Compiling thiserror-impl v2.0.17
[INFO] [stderr]    Compiling syslog_proto v0.1.0-alpha0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(const_trait_impl, const_convert, const_default)]
[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 `syslog_proto` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "90a5f1d85d349bca353f6824dcfa1e945bf388c4f43fa0abb6adc96785eb3d44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90a5f1d85d349bca353f6824dcfa1e945bf388c4f43fa0abb6adc96785eb3d44", kill_on_drop: false }`
[INFO] [stdout] 90a5f1d85d349bca353f6824dcfa1e945bf388c4f43fa0abb6adc96785eb3d44