[INFO] fetching crate lpc177x_8x 0.13.5...
[INFO] testing lpc177x_8x-0.13.5 against 1.60.0 for beta-1.61-1
[INFO] extracting crate lpc177x_8x 0.13.5 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate lpc177x_8x 0.13.5 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lpc177x_8x 0.13.5
[INFO] finished tweaking crates.io crate lpc177x_8x 0.13.5
[INFO] tweaked toml for crates.io crate lpc177x_8x 0.13.5 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bc6588ab4709135f150359f9fd2cdd4ab9e22de11d8f1fb0b76f758fa3085614
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "bc6588ab4709135f150359f9fd2cdd4ab9e22de11d8f1fb0b76f758fa3085614", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bc6588ab4709135f150359f9fd2cdd4ab9e22de11d8f1fb0b76f758fa3085614", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc6588ab4709135f150359f9fd2cdd4ab9e22de11d8f1fb0b76f758fa3085614", kill_on_drop: false }`
[INFO] [stdout] bc6588ab4709135f150359f9fd2cdd4ab9e22de11d8f1fb0b76f758fa3085614
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 4390e2cc1797830d8c4cbee7904183f3b55400a80499a6624c437215b08fa763
[INFO] running `Command { std: "docker" "start" "-a" "4390e2cc1797830d8c4cbee7904183f3b55400a80499a6624c437215b08fa763", kill_on_drop: false }`
[INFO] [stderr]    Compiling cortex-m v0.5.11
[INFO] [stderr]    Compiling lpc177x_8x v0.13.5 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling aligned v0.2.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(untagged_unions)]
[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 `lpc177x_8x` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "4390e2cc1797830d8c4cbee7904183f3b55400a80499a6624c437215b08fa763", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4390e2cc1797830d8c4cbee7904183f3b55400a80499a6624c437215b08fa763", kill_on_drop: false }`
[INFO] [stdout] 4390e2cc1797830d8c4cbee7904183f3b55400a80499a6624c437215b08fa763