[INFO] fetching crate canonical 0.7.1...
[INFO] documenting canonical-0.7.1 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate canonical 0.7.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate canonical 0.7.1 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 canonical 0.7.1
[INFO] finished tweaking crates.io crate canonical 0.7.1
[INFO] tweaked toml for crates.io crate canonical 0.7.1 written to /workspace/builds/worker-0/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 4cbcc464d15656e8777fa6b8b7682aed07b55dceb9158f5d72e90b3144a64aa9
[INFO] running `Command { std: "docker" "start" "-a" "4cbcc464d15656e8777fa6b8b7682aed07b55dceb9158f5d72e90b3144a64aa9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4cbcc464d15656e8777fa6b8b7682aed07b55dceb9158f5d72e90b3144a64aa9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4cbcc464d15656e8777fa6b8b7682aed07b55dceb9158f5d72e90b3144a64aa9", kill_on_drop: false }`
[INFO] [stdout] 4cbcc464d15656e8777fa6b8b7682aed07b55dceb9158f5d72e90b3144a64aa9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 1e0516504d23c6a5c90dde7ef843308e58cac26d06352830f8c4bab91cffe8d8
[INFO] running `Command { std: "docker" "start" "-a" "1e0516504d23c6a5c90dde7ef843308e58cac26d06352830f8c4bab91cffe8d8", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling parking_lot_core v0.9.3
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]     Checking smallvec v1.8.0
[INFO] [stderr]     Checking arrayref v0.3.6
[INFO] [stderr]     Checking constant_time_eq v0.1.5
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking arbitrary v1.1.0
[INFO] [stderr]     Checking dusk-varint v0.1.0
[INFO] [stderr]     Checking array-init v2.0.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling lock_api v0.4.7
[INFO] [stderr]     Checking blake2b_simd v0.3.1
[INFO] [stderr]     Checking parking_lot v0.12.0
[INFO] [stderr]  Documenting canonical v0.7.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:16:1
[INFO] [stdout]    |
[INFO] [stdout] 16 | #![feature(never_type)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `canonical`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name canonical src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=68057351db526de8 -L dependency=/opt/rustwide/target/debug/deps --extern arbitrary=/opt/rustwide/target/debug/deps/libarbitrary-b18a78072022f9a4.rmeta --extern array_init=/opt/rustwide/target/debug/deps/libarray_init-54156841ac9ad0e9.rmeta --extern blake2b_simd=/opt/rustwide/target/debug/deps/libblake2b_simd-e05ecde205c95db3.rmeta --extern cfg_if=/opt/rustwide/target/debug/deps/libcfg_if-483f5a2788925099.rmeta --extern dusk_varint=/opt/rustwide/target/debug/deps/libdusk_varint-a52d3d563eff8a7c.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-701e134f05ff346a.rmeta --extern parking_lot=/opt/rustwide/target/debug/deps/libparking_lot-c40c7c37ac9ee99c.rmeta --cap-lints=warn --crate-version 0.7.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "1e0516504d23c6a5c90dde7ef843308e58cac26d06352830f8c4bab91cffe8d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e0516504d23c6a5c90dde7ef843308e58cac26d06352830f8c4bab91cffe8d8", kill_on_drop: false }`
[INFO] [stdout] 1e0516504d23c6a5c90dde7ef843308e58cac26d06352830f8c4bab91cffe8d8