[INFO] fetching crate dusk-bls12_381-sign 0.3.0-rc.0...
[INFO] testing dusk-bls12_381-sign-0.3.0-rc.0 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate dusk-bls12_381-sign 0.3.0-rc.0 into /workspace/builds/worker-20/source
[INFO] validating manifest of crates.io crate dusk-bls12_381-sign 0.3.0-rc.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 dusk-bls12_381-sign 0.3.0-rc.0
[INFO] finished tweaking crates.io crate dusk-bls12_381-sign 0.3.0-rc.0
[INFO] tweaked toml for crates.io crate dusk-bls12_381-sign 0.3.0-rc.0 written to /workspace/builds/worker-20/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "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-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6c19e61752f179465b33d7875f9d76533715c83878109e88d5735d6d8e94682d
[INFO] running `Command { std: "docker" "start" "-a" "6c19e61752f179465b33d7875f9d76533715c83878109e88d5735d6d8e94682d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6c19e61752f179465b33d7875f9d76533715c83878109e88d5735d6d8e94682d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6c19e61752f179465b33d7875f9d76533715c83878109e88d5735d6d8e94682d", kill_on_drop: false }`
[INFO] [stdout] 6c19e61752f179465b33d7875f9d76533715c83878109e88d5735d6d8e94682d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3ee19987e052934a1f3c994206881e1397f106edafb5e48252c873656f2ada43
[INFO] running `Command { std: "docker" "start" "-a" "3ee19987e052934a1f3c994206881e1397f106edafb5e48252c873656f2ada43", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.15.0
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling generic-array v0.14.5
[INFO] [stderr]    Compiling crypto-common v0.1.3
[INFO] [stderr]    Compiling block-buffer v0.10.2
[INFO] [stderr]    Compiling digest v0.10.3
[INFO] [stderr]    Compiling blake2 v0.10.4
[INFO] [stderr]    Compiling derive-hex v0.1.2
[INFO] [stderr]    Compiling 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" "3ee19987e052934a1f3c994206881e1397f106edafb5e48252c873656f2ada43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ee19987e052934a1f3c994206881e1397f106edafb5e48252c873656f2ada43", kill_on_drop: false }`
[INFO] [stdout] 3ee19987e052934a1f3c994206881e1397f106edafb5e48252c873656f2ada43