[INFO] fetching crate microkelvin 0.15.0-rc.1...
[INFO] testing microkelvin-0.15.0-rc.1 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate microkelvin 0.15.0-rc.1 into /workspace/builds/worker-24/source
[INFO] validating manifest of crates.io crate microkelvin 0.15.0-rc.1 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] removed /workspace/builds/worker-24/source/rust-toolchain
[INFO] started tweaking crates.io crate microkelvin 0.15.0-rc.1
[INFO] finished tweaking crates.io crate microkelvin 0.15.0-rc.1
[INFO] tweaked toml for crates.io crate microkelvin 0.15.0-rc.1 written to /workspace/builds/worker-24/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] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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] 5ff4fe265dc8534e50f8a8c1c8535c493d6e241c0e1d8106cf415417e34a81f1
[INFO] running `Command { std: "docker" "start" "-a" "5ff4fe265dc8534e50f8a8c1c8535c493d6e241c0e1d8106cf415417e34a81f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5ff4fe265dc8534e50f8a8c1c8535c493d6e241c0e1d8106cf415417e34a81f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ff4fe265dc8534e50f8a8c1c8535c493d6e241c0e1d8106cf415417e34a81f1", kill_on_drop: false }`
[INFO] [stdout] 5ff4fe265dc8534e50f8a8c1c8535c493d6e241c0e1d8106cf415417e34a81f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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] c7058a53072c15aa9c573d4bc8b11d73f4071e6a4e99b9ce14c4329c1d2992f6
[INFO] running `Command { std: "docker" "start" "-a" "c7058a53072c15aa9c573d4bc8b11d73f4071e6a4e99b9ce14c4329c1d2992f6", kill_on_drop: false }`
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling nodrop v0.1.14
[INFO] [stderr]    Compiling arbitrary v1.1.0
[INFO] [stderr]    Compiling array-init v2.0.0
[INFO] [stderr]    Compiling dusk-varint v0.1.0
[INFO] [stderr]    Compiling blake2b_simd v0.3.1
[INFO] [stderr]    Compiling canonical v0.7.0
[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/canonical-0.7.0/src/lib.rs:16:1
[INFO] [stdout]    |
[INFO] [stdout] 16 | #![feature(never_type)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^
[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 `canonical` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "c7058a53072c15aa9c573d4bc8b11d73f4071e6a4e99b9ce14c4329c1d2992f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c7058a53072c15aa9c573d4bc8b11d73f4071e6a4e99b9ce14c4329c1d2992f6", kill_on_drop: false }`
[INFO] [stdout] c7058a53072c15aa9c573d4bc8b11d73f4071e6a4e99b9ce14c4329c1d2992f6