[INFO] fetching crate con-art-rust 0.2.0...
[INFO] testing con-art-rust-0.2.0 against 1.59.0 for beta-1.60-1
[INFO] extracting crate con-art-rust 0.2.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate con-art-rust 0.2.0 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate con-art-rust 0.2.0
[INFO] finished tweaking crates.io crate con-art-rust 0.2.0
[INFO] tweaked toml for crates.io crate con-art-rust 0.2.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5360e5d3c5c445a2cf21fc82c56e2552169560965c4a00bed5e66f03a6ea16e6
[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" "5360e5d3c5c445a2cf21fc82c56e2552169560965c4a00bed5e66f03a6ea16e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5360e5d3c5c445a2cf21fc82c56e2552169560965c4a00bed5e66f03a6ea16e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5360e5d3c5c445a2cf21fc82c56e2552169560965c4a00bed5e66f03a6ea16e6", kill_on_drop: false }`
[INFO] [stdout] 5360e5d3c5c445a2cf21fc82c56e2552169560965c4a00bed5e66f03a6ea16e6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "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] 886e00a205341625113d16d33adbaca0d7d61fbe277b673dfabf348de8e3d0bc
[INFO] running `Command { std: "docker" "start" "-a" "886e00a205341625113d16d33adbaca0d7d61fbe277b673dfabf348de8e3d0bc", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.7
[INFO] [stderr]    Compiling con-art-rust v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 43 | #![feature(core_intrinsics)]
[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 `con-art-rust` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "886e00a205341625113d16d33adbaca0d7d61fbe277b673dfabf348de8e3d0bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "886e00a205341625113d16d33adbaca0d7d61fbe277b673dfabf348de8e3d0bc", kill_on_drop: false }`
[INFO] [stdout] 886e00a205341625113d16d33adbaca0d7d61fbe277b673dfabf348de8e3d0bc