[INFO] fetching crate dusk-hades 0.18.0-rc.0...
[INFO] documenting dusk-hades-0.18.0-rc.0 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate dusk-hades 0.18.0-rc.0 into /workspace/builds/worker-17/source
[INFO] validating manifest of crates.io crate dusk-hades 0.18.0-rc.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] removed /workspace/builds/worker-17/source/rust-toolchain
[INFO] started tweaking crates.io crate dusk-hades 0.18.0-rc.0
[INFO] finished tweaking crates.io crate dusk-hades 0.18.0-rc.0
[INFO] tweaked toml for crates.io crate dusk-hades 0.18.0-rc.0 written to /workspace/builds/worker-17/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/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] ff639c2e6c46152d7f11d7ab105eaf3741546c7b6e8f530a467aca7fe1a751d2
[INFO] running `Command { std: "docker" "start" "-a" "ff639c2e6c46152d7f11d7ab105eaf3741546c7b6e8f530a467aca7fe1a751d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ff639c2e6c46152d7f11d7ab105eaf3741546c7b6e8f530a467aca7fe1a751d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff639c2e6c46152d7f11d7ab105eaf3741546c7b6e8f530a467aca7fe1a751d2", kill_on_drop: false }`
[INFO] [stdout] ff639c2e6c46152d7f11d7ab105eaf3741546c7b6e8f530a467aca7fe1a751d2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/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] cbfa228b62932ccbe4ea8ac4765abf7f62a36d8b6739d02582a8c3fca675e6cb
[INFO] running `Command { std: "docker" "start" "-a" "cbfa228b62932ccbe4ea8ac4765abf7f62a36d8b6739d02582a8c3fca675e6cb", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]     Checking subtle v2.4.1
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling derive-hex v0.1.2
[INFO] [stderr]     Checking dusk-bytes v0.1.5
[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/dusk-bytes-0.1.5/src/lib.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(const_panic)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `const_panic` has been stable since 1.57.0 and no longer requires an attribute to enable
[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 `dusk-bytes` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "cbfa228b62932ccbe4ea8ac4765abf7f62a36d8b6739d02582a8c3fca675e6cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cbfa228b62932ccbe4ea8ac4765abf7f62a36d8b6739d02582a8c3fca675e6cb", kill_on_drop: false }`
[INFO] [stdout] cbfa228b62932ccbe4ea8ac4765abf7f62a36d8b6739d02582a8c3fca675e6cb