[INFO] fetching crate idealist 0.1.1...
[INFO] testing idealist-0.1.1 against beta-2020-10-09 for beta-1.48-1
[INFO] extracting crate idealist 0.1.1 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate idealist 0.1.1 on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate idealist 0.1.1
[INFO] finished tweaking crates.io crate idealist 0.1.1
[INFO] tweaked toml for crates.io crate idealist 0.1.1 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 51b3c7fc1b8a8334bb94ab8ff661f0cf207bd9c4305cdd5e9f173b1f527183be
[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" "51b3c7fc1b8a8334bb94ab8ff661f0cf207bd9c4305cdd5e9f173b1f527183be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "51b3c7fc1b8a8334bb94ab8ff661f0cf207bd9c4305cdd5e9f173b1f527183be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51b3c7fc1b8a8334bb94ab8ff661f0cf207bd9c4305cdd5e9f173b1f527183be", kill_on_drop: false }`
[INFO] [stdout] 51b3c7fc1b8a8334bb94ab8ff661f0cf207bd9c4305cdd5e9f173b1f527183be
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "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] 53ca0de32d1e7d327df02af752a18beae1cc5ab93378bf6b9678a5a7cf770363
[INFO] running `Command { std: "docker" "start" "-a" "53ca0de32d1e7d327df02af752a18beae1cc5ab93378bf6b9678a5a7cf770363", kill_on_drop: false }`
[INFO] [stderr]    Compiling idealist v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(const_generics, const_evaluatable_checked, generic_associated_types, never_type, const_fn, const_trait_impl, arbitrary_self_types, const_option, toowned_clone_into, dropck_eyepatch, extend_one)]
[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 `idealist`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "53ca0de32d1e7d327df02af752a18beae1cc5ab93378bf6b9678a5a7cf770363", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53ca0de32d1e7d327df02af752a18beae1cc5ab93378bf6b9678a5a7cf770363", kill_on_drop: false }`
[INFO] [stdout] 53ca0de32d1e7d327df02af752a18beae1cc5ab93378bf6b9678a5a7cf770363
