[INFO] fetching crate nrf52840 0.2.0...
[INFO] testing nrf52840-0.2.0 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate nrf52840 0.2.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate nrf52840 0.2.0 on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate nrf52840 0.2.0
[INFO] finished tweaking crates.io crate nrf52840 0.2.0
[INFO] tweaked toml for crates.io crate nrf52840 0.2.0 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", 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] b9e1ec86120593f2cedfc301b73e6e66e25fb94e0cde49de495b02f6db901fa5
[INFO] running `Command { std: "docker" "start" "-a" "b9e1ec86120593f2cedfc301b73e6e66e25fb94e0cde49de495b02f6db901fa5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b9e1ec86120593f2cedfc301b73e6e66e25fb94e0cde49de495b02f6db901fa5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9e1ec86120593f2cedfc301b73e6e66e25fb94e0cde49de495b02f6db901fa5", kill_on_drop: false }`
[INFO] [stdout] b9e1ec86120593f2cedfc301b73e6e66e25fb94e0cde49de495b02f6db901fa5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+beta-2022-04-10" "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] 31f218f436431a76cc4ba21fdaf4616619d4a03c0986cccbb44a314ec1b6d5bf
[INFO] running `Command { std: "docker" "start" "-a" "31f218f436431a76cc4ba21fdaf4616619d4a03c0986cccbb44a314ec1b6d5bf", kill_on_drop: false }`
[INFO] [stderr]    Compiling cortex-m v0.7.4
[INFO] [stderr]    Compiling vcell v0.1.3
[INFO] [stderr]    Compiling cortex-m v0.6.7
[INFO] [stderr]    Compiling bitfield v0.13.2
[INFO] [stderr]    Compiling cortex-m v0.5.11
[INFO] [stderr]    Compiling aligned v0.2.0
[INFO] [stderr]    Compiling nrf52840 v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling generic-array v0.13.3
[INFO] [stderr]    Compiling generic-array v0.12.4
[INFO] [stderr]    Compiling volatile-register v0.2.1
[INFO] [stderr]    Compiling as-slice v0.1.5
[INFO] [stderr]    Compiling aligned v0.3.5
[INFO] [stdout] warning: lint `private_no_mangle_statics` has been removed: no longer a warning, `#[no_mangle]` statics always exported
[INFO] [stdout]     --> src/lib.rs:1643:9
[INFO] [stdout]      |
[INFO] [stdout] 1643 | #[allow(private_no_mangle_statics)]
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]     --> src/lib.rs:3:9
[INFO] [stdout]      |
[INFO] [stdout] 3    | #![deny(warnings)]
[INFO] [stdout]      |         ^^^^^^^^
[INFO] [stdout]      = note: `#[warn(renamed_and_removed_lints)]` implied by `#[warn(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta 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; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `nrf52840` due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "31f218f436431a76cc4ba21fdaf4616619d4a03c0986cccbb44a314ec1b6d5bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "31f218f436431a76cc4ba21fdaf4616619d4a03c0986cccbb44a314ec1b6d5bf", kill_on_drop: false }`
[INFO] [stdout] 31f218f436431a76cc4ba21fdaf4616619d4a03c0986cccbb44a314ec1b6d5bf