[INFO] fetching crate staticsort 0.4.1...
[INFO] testing staticsort-0.4.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate staticsort 0.4.1 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate staticsort 0.4.1 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate staticsort 0.4.1
[INFO] finished tweaking crates.io crate staticsort 0.4.1
[INFO] tweaked toml for crates.io crate staticsort 0.4.1 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate staticsort 0.4.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2a9a2657554d924ce0208cfdcb03e3c874ab6680aef8f70871a5aa4d806d1ca8
[INFO] running `Command { std: "docker" "start" "-a" "2a9a2657554d924ce0208cfdcb03e3c874ab6680aef8f70871a5aa4d806d1ca8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2a9a2657554d924ce0208cfdcb03e3c874ab6680aef8f70871a5aa4d806d1ca8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a9a2657554d924ce0208cfdcb03e3c874ab6680aef8f70871a5aa4d806d1ca8", kill_on_drop: false }`
[INFO] [stdout] 2a9a2657554d924ce0208cfdcb03e3c874ab6680aef8f70871a5aa4d806d1ca8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 691a1a55fb0566e7587c3249870e33d26624df57b17099e707a5de2c94e66834
[INFO] running `Command { std: "docker" "start" "-a" "691a1a55fb0566e7587c3249870e33d26624df57b17099e707a5de2c94e66834", kill_on_drop: false }`
[INFO] [stderr]    Compiling staticsort v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(const_fn_floating_point_arithmetic, const_generics)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `staticsort` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "691a1a55fb0566e7587c3249870e33d26624df57b17099e707a5de2c94e66834", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "691a1a55fb0566e7587c3249870e33d26624df57b17099e707a5de2c94e66834", kill_on_drop: false }`
[INFO] [stdout] 691a1a55fb0566e7587c3249870e33d26624df57b17099e707a5de2c94e66834