[INFO] fetching crate lpc177x_8x 0.13.5...
[INFO] testing lpc177x_8x-0.13.5 against 1.59.0 for beta-1.60-1
[INFO] extracting crate lpc177x_8x 0.13.5 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate lpc177x_8x 0.13.5 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "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-14/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 560bd3b52d72b4efa89f040e52158a8fd4c08a36ea34f049714d47c61736ccd6
[INFO] running `Command { std: "docker" "start" "-a" "560bd3b52d72b4efa89f040e52158a8fd4c08a36ea34f049714d47c61736ccd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "560bd3b52d72b4efa89f040e52158a8fd4c08a36ea34f049714d47c61736ccd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "560bd3b52d72b4efa89f040e52158a8fd4c08a36ea34f049714d47c61736ccd6", kill_on_drop: false }`
[INFO] [stdout] 560bd3b52d72b4efa89f040e52158a8fd4c08a36ea34f049714d47c61736ccd6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9bf919c89793da9f7ed8ca3f689ae81582aca10ed85bdd0c2f8b32662a5fd621
[INFO] running `Command { std: "docker" "start" "-a" "9bf919c89793da9f7ed8ca3f689ae81582aca10ed85bdd0c2f8b32662a5fd621", kill_on_drop: false }`
[INFO] [stderr]    Compiling nb v1.0.0
[INFO] [stderr]    Compiling cortex-m v0.7.4
[INFO] [stderr]    Compiling vcell v0.1.3
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling bitfield v0.13.2
[INFO] [stderr]    Compiling cortex-m v0.6.7
[INFO] [stderr]    Compiling cortex-m v0.5.11
[INFO] [stderr]    Compiling aligned v0.2.0
[INFO] [stderr]    Compiling lpc177x_8x v0.13.5 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling generic-array v0.14.5
[INFO] [stderr]    Compiling generic-array v0.13.3
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]    Compiling volatile-register v0.2.1
[INFO] [stderr]    Compiling nb v0.1.3
[INFO] [stderr]    Compiling embedded-hal v0.2.7
[INFO] [stderr]    Compiling as-slice v0.1.5
[INFO] [stderr]    Compiling aligned v0.3.5
[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" "9bf919c89793da9f7ed8ca3f689ae81582aca10ed85bdd0c2f8b32662a5fd621", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9bf919c89793da9f7ed8ca3f689ae81582aca10ed85bdd0c2f8b32662a5fd621", kill_on_drop: false }`
[INFO] [stdout] 9bf919c89793da9f7ed8ca3f689ae81582aca10ed85bdd0c2f8b32662a5fd621