[INFO] fetching crate hv-atom 0.1.0...
[INFO] testing hv-atom-0.1.0 against 1.59.0 for beta-1.60-1
[INFO] extracting crate hv-atom 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate hv-atom 0.1.0 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 hv-atom 0.1.0
[INFO] finished tweaking crates.io crate hv-atom 0.1.0
[INFO] tweaked toml for crates.io crate hv-atom 0.1.0 written to /workspace/builds/worker-4/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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 8b77e481d07d43046f22c6deae788b6461ada64e7fed09478e5e09050cd86d20
[INFO] running `Command { std: "docker" "start" "-a" "8b77e481d07d43046f22c6deae788b6461ada64e7fed09478e5e09050cd86d20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8b77e481d07d43046f22c6deae788b6461ada64e7fed09478e5e09050cd86d20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b77e481d07d43046f22c6deae788b6461ada64e7fed09478e5e09050cd86d20", kill_on_drop: false }`
[INFO] [stdout] 8b77e481d07d43046f22c6deae788b6461ada64e7fed09478e5e09050cd86d20
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] dc94db22a9ce69e1892d2929169972b5ce92850c7a09e2a76cee05735dcd8c2d
[INFO] running `Command { std: "docker" "start" "-a" "dc94db22a9ce69e1892d2929169972b5ce92850c7a09e2a76cee05735dcd8c2d", kill_on_drop: false }`
[INFO] [stderr]    Compiling hv-atom v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(const_fn_fn_ptr_basics)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | #![feature(result_into_ok_or_err)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hv-atom` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "dc94db22a9ce69e1892d2929169972b5ce92850c7a09e2a76cee05735dcd8c2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc94db22a9ce69e1892d2929169972b5ce92850c7a09e2a76cee05735dcd8c2d", kill_on_drop: false }`
[INFO] [stdout] dc94db22a9ce69e1892d2929169972b5ce92850c7a09e2a76cee05735dcd8c2d