[INFO] cloning repository https://github.com/dennisolien/rust-arduino-blink
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dennisolien/rust-arduino-blink" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdennisolien%2Frust-arduino-blink", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdennisolien%2Frust-arduino-blink'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7446cfd438b13e36b0708e44df6970ac832d85ad
[INFO] documenting dennisolien/rust-arduino-blink against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdennisolien%2Frust-arduino-blink" "/workspace/builds/worker-23/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-23/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dennisolien/rust-arduino-blink 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] removed /workspace/builds/worker-23/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/dennisolien/rust-arduino-blink
[INFO] finished tweaking git repo https://github.com/dennisolien/rust-arduino-blink
[INFO] tweaked toml for git repo https://github.com/dennisolien/rust-arduino-blink written to /workspace/builds/worker-23/source/Cargo.toml
[INFO] crate git repo https://github.com/dennisolien/rust-arduino-blink already has a lockfile, it will not be regenerated
[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-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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] e15edf29a5402c9317b167f53bedb8f0d5dc858d5b8468eb016969e9d2e6257b
[INFO] running `Command { std: "docker" "start" "-a" "e15edf29a5402c9317b167f53bedb8f0d5dc858d5b8468eb016969e9d2e6257b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e15edf29a5402c9317b167f53bedb8f0d5dc858d5b8468eb016969e9d2e6257b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e15edf29a5402c9317b167f53bedb8f0d5dc858d5b8468eb016969e9d2e6257b", kill_on_drop: false }`
[INFO] [stdout] e15edf29a5402c9317b167f53bedb8f0d5dc858d5b8468eb016969e9d2e6257b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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] 57be2de27a2427cef848b4cb70fcd54511b251d51671c119444adcef61a452eb
[INFO] running `Command { std: "docker" "start" "-a" "57be2de27a2427cef848b4cb70fcd54511b251d51671c119444adcef61a452eb", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]     Checking nb v1.0.0
[INFO] [stderr]     Checking vcell v0.1.3
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking ufmt-write v0.1.0
[INFO] [stderr]    Compiling paste v1.0.6
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking panic-halt v0.2.0
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]     Checking embedded-hal v0.2.6
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]    Compiling ufmt-macros v0.1.1
[INFO] [stderr]    Compiling avr-device-macros v0.3.2
[INFO] [stderr]     Checking ufmt v0.1.0
[INFO] [stderr]     Checking avr-device v0.3.2
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/avr-device-0.3.2/src/lib.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 | #![feature(llvm_asm)]
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `llvm_asm`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/avr-device-0.3.2/src/lib.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 | #![feature(llvm_asm)]
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0635.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `avr-device` due to 3 previous errors
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "57be2de27a2427cef848b4cb70fcd54511b251d51671c119444adcef61a452eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57be2de27a2427cef848b4cb70fcd54511b251d51671c119444adcef61a452eb", kill_on_drop: false }`
[INFO] [stdout] 57be2de27a2427cef848b4cb70fcd54511b251d51671c119444adcef61a452eb