[INFO] fetching crate lockless 0.2.0...
[INFO] building lockless-0.2.0 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate lockless 0.2.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate lockless 0.2.0 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lockless 0.2.0
[INFO] finished tweaking crates.io crate lockless 0.2.0
[INFO] tweaked toml for crates.io crate lockless 0.2.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded owning_ref v0.2.4
[INFO] [stderr]   Downloaded parking_lot_core v0.2.14
[INFO] [stderr]   Downloaded parking_lot v0.3.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "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] 38d0b44fab7c57bbaae59c22d62385c37149abe26f957369c44ad3505437471f
[INFO] running `Command { std: "docker" "start" "-a" "38d0b44fab7c57bbaae59c22d62385c37149abe26f957369c44ad3505437471f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "38d0b44fab7c57bbaae59c22d62385c37149abe26f957369c44ad3505437471f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38d0b44fab7c57bbaae59c22d62385c37149abe26f957369c44ad3505437471f", kill_on_drop: false }`
[INFO] [stdout] 38d0b44fab7c57bbaae59c22d62385c37149abe26f957369c44ad3505437471f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5a9b5cb28f38a5884c972223e5da8496cd819f37871f9afb7052b3d852e42525
[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" "5a9b5cb28f38a5884c972223e5da8496cd819f37871f9afb7052b3d852e42525", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling lockless v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `futures::task::park`: renamed to `current`
[INFO] [stdout]    --> src/sync/mpsc_queue.rs:143:45
[INFO] [stdout]     |
[INFO] [stdout] 143 |         self.tasks.swap(id.into(), id, Some(task::park())).is_some()
[INFO] [stdout]     |                                             ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `futures::task::Task::unpark`: renamed to `notify`
[INFO] [stdout]    --> src/sync/mpsc_queue.rs:137:18
[INFO] [stdout]     |
[INFO] [stdout] 137 |             task.unpark();
[INFO] [stdout]     |                  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 2 warnings 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 `lockless`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "5a9b5cb28f38a5884c972223e5da8496cd819f37871f9afb7052b3d852e42525", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a9b5cb28f38a5884c972223e5da8496cd819f37871f9afb7052b3d852e42525", kill_on_drop: false }`
[INFO] [stdout] 5a9b5cb28f38a5884c972223e5da8496cd819f37871f9afb7052b3d852e42525