[INFO] fetching crate microbit-v2 0.12.0...
[INFO] documenting microbit-v2-0.12.0 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate microbit-v2 0.12.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate microbit-v2 0.12.0 on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate microbit-v2 0.12.0
[INFO] finished tweaking crates.io crate microbit-v2 0.12.0
[INFO] tweaked toml for crates.io crate microbit-v2 0.12.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a16ba1552bfebf3f5d1e4ef55f3b5225de758dbcc715d836c1bc7d593013f9bf
[INFO] running `Command { std: "docker" "start" "-a" "a16ba1552bfebf3f5d1e4ef55f3b5225de758dbcc715d836c1bc7d593013f9bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a16ba1552bfebf3f5d1e4ef55f3b5225de758dbcc715d836c1bc7d593013f9bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a16ba1552bfebf3f5d1e4ef55f3b5225de758dbcc715d836c1bc7d593013f9bf", kill_on_drop: false }`
[INFO] [stdout] a16ba1552bfebf3f5d1e4ef55f3b5225de758dbcc715d836c1bc7d593013f9bf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2d332ac48fc26ed686ff1ab4c3a87c826dfd966e7f9bb199bd10770d576e9543
[INFO] running `Command { std: "docker" "start" "-a" "2d332ac48fc26ed686ff1ab4c3a87c826dfd966e7f9bb199bd10770d576e9543", kill_on_drop: false }`
[INFO] [stderr]    Compiling cortex-m v0.7.4
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]     Checking nb v1.0.0
[INFO] [stderr]    Compiling cortex-m-rt v0.7.1
[INFO] [stderr]     Checking vcell v0.1.3
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling az v1.2.0
[INFO] [stderr]     Checking bitfield v0.13.2
[INFO] [stderr]    Compiling critical-section v0.2.7
[INFO] [stderr]    Compiling nrf52833-pac v0.10.1
[INFO] [stderr]     Checking bare-metal v1.0.0
[INFO] [stderr]    Compiling fixed v1.15.0
[INFO] [stderr]    Compiling nrf-hal-common v0.14.1
[INFO] [stderr]     Checking usb-device v0.2.8
[INFO] [stderr]     Checking bytemuck v1.9.1
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling nrf52833-hal v0.14.1
[INFO] [stderr]     Checking embedded-storage v0.2.0
[INFO] [stderr]     Checking cast v0.3.0
[INFO] [stderr]     Checking tiny-led-matrix v1.0.2
[INFO] [stderr]    Compiling typenum v1.15.0
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]     Checking volatile-register v0.2.1
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]     Checking embedded-dma v0.1.2
[INFO] [stderr]     Checking embedded-hal v0.2.7
[INFO] [stderr]     Checking nrf-usbd v0.1.1
[INFO] [stderr]    Compiling cortex-m-rt-macros v0.7.0
[INFO] [stderr]     Checking microbit-common v0.12.0
[INFO] [stderr]  Documenting microbit-v2 v0.12.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not document `microbit-v2`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name microbit src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=29244f681ab1c095 -L dependency=/opt/rustwide/target/debug/deps --extern microbit_common=/opt/rustwide/target/debug/deps/libmicrobit_common-3b63b96095bb2e40.rmeta --cap-lints=warn --crate-version 0.12.0` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "2d332ac48fc26ed686ff1ab4c3a87c826dfd966e7f9bb199bd10770d576e9543", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d332ac48fc26ed686ff1ab4c3a87c826dfd966e7f9bb199bd10770d576e9543", kill_on_drop: false }`
[INFO] [stdout] 2d332ac48fc26ed686ff1ab4c3a87c826dfd966e7f9bb199bd10770d576e9543