[INFO] cloning repository https://github.com/philip-peterson/arc_new_cyclic_n
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/philip-peterson/arc_new_cyclic_n" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphilip-peterson%2Farc_new_cyclic_n", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphilip-peterson%2Farc_new_cyclic_n'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9f22a71adc35813566fe28c8b21285ee97b20028
[INFO] testing philip-peterson/arc_new_cyclic_n against beta-2022-02-22 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphilip-peterson%2Farc_new_cyclic_n" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/philip-peterson/arc_new_cyclic_n on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/philip-peterson/arc_new_cyclic_n
[INFO] finished tweaking git repo https://github.com/philip-peterson/arc_new_cyclic_n
[INFO] tweaked toml for git repo https://github.com/philip-peterson/arc_new_cyclic_n written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/philip-peterson/arc_new_cyclic_n already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a9d7b7c0db301a79ee529db4a657fd1375d8672346b399bff5cd096f9cfa77f0
[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" "a9d7b7c0db301a79ee529db4a657fd1375d8672346b399bff5cd096f9cfa77f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a9d7b7c0db301a79ee529db4a657fd1375d8672346b399bff5cd096f9cfa77f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9d7b7c0db301a79ee529db4a657fd1375d8672346b399bff5cd096f9cfa77f0", kill_on_drop: false }`
[INFO] [stdout] a9d7b7c0db301a79ee529db4a657fd1375d8672346b399bff5cd096f9cfa77f0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 30e58f544ca49e36f29934d69c2d6f8ea4cefd3fdd10f7d24f7d6cff968f50c9
[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" "30e58f544ca49e36f29934d69c2d6f8ea4cefd3fdd10f7d24f7d6cff968f50c9", kill_on_drop: false }`
[INFO] [stderr]    Compiling arc_new_cyclic_n v1.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(arc_new_cyclic)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `arc_new_cyclic` has been stable since 1.60.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(arc_new_cyclic)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `arc_new_cyclic_n` due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "30e58f544ca49e36f29934d69c2d6f8ea4cefd3fdd10f7d24f7d6cff968f50c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "30e58f544ca49e36f29934d69c2d6f8ea4cefd3fdd10f7d24f7d6cff968f50c9", kill_on_drop: false }`
[INFO] [stdout] 30e58f544ca49e36f29934d69c2d6f8ea4cefd3fdd10f7d24f7d6cff968f50c9