[INFO] fetching crate dusk-hades 0.16.0...
[INFO] testing dusk-hades-0.16.0 against 1.54.0 for beta-1.55-1
[INFO] extracting crate dusk-hades 0.16.0 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate dusk-hades 0.16.0 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-11/source/rust-toolchain
[INFO] started tweaking crates.io crate dusk-hades 0.16.0
[INFO] finished tweaking crates.io crate dusk-hades 0.16.0
[INFO] tweaked toml for crates.io crate dusk-hades 0.16.0 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "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" "+1.54.0" "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-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b7e185beb6d43f2bc0b2b855ef7eae9b6248afa936e0c4933f6cfef0bd3cbae8
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b7e185beb6d43f2bc0b2b855ef7eae9b6248afa936e0c4933f6cfef0bd3cbae8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b7e185beb6d43f2bc0b2b855ef7eae9b6248afa936e0c4933f6cfef0bd3cbae8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7e185beb6d43f2bc0b2b855ef7eae9b6248afa936e0c4933f6cfef0bd3cbae8", kill_on_drop: false }`
[INFO] [stdout] b7e185beb6d43f2bc0b2b855ef7eae9b6248afa936e0c4933f6cfef0bd3cbae8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b79a5973b3c5a3dd3b1902bb00eb61c846b9d98ac2a5df4298f6813a6b2fdc39
[INFO] running `Command { std: "docker" "start" "-a" "b79a5973b3c5a3dd3b1902bb00eb61c846b9d98ac2a5df4298f6813a6b2fdc39", kill_on_drop: false }`
[INFO] [stderr]    Compiling hashbrown v0.9.1
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling derive-hex v0.1.2
[INFO] [stderr]    Compiling zeroize_derive v1.1.0
[INFO] [stderr]    Compiling dusk-bytes v0.1.5
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable 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]    | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling zeroize v1.4.1
[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`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "b79a5973b3c5a3dd3b1902bb00eb61c846b9d98ac2a5df4298f6813a6b2fdc39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b79a5973b3c5a3dd3b1902bb00eb61c846b9d98ac2a5df4298f6813a6b2fdc39", kill_on_drop: false }`
[INFO] [stdout] b79a5973b3c5a3dd3b1902bb00eb61c846b9d98ac2a5df4298f6813a6b2fdc39
