[INFO] fetching crate safina-threadpool 0.1.2...
[INFO] testing safina-threadpool-0.1.2 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate safina-threadpool 0.1.2 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate safina-threadpool 0.1.2 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 safina-threadpool 0.1.2
[INFO] finished tweaking crates.io crate safina-threadpool 0.1.2
[INFO] tweaked toml for crates.io crate safina-threadpool 0.1.2 written to /workspace/builds/worker-1/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 safina-timer v0.1.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] [stdout] b8f27f836d669b7198b240da598cfb861b3681be9d8c09ee257ff89ecfdabf47
[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" "b8f27f836d669b7198b240da598cfb861b3681be9d8c09ee257ff89ecfdabf47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b8f27f836d669b7198b240da598cfb861b3681be9d8c09ee257ff89ecfdabf47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8f27f836d669b7198b240da598cfb861b3681be9d8c09ee257ff89ecfdabf47", kill_on_drop: false }`
[INFO] [stdout] b8f27f836d669b7198b240da598cfb861b3681be9d8c09ee257ff89ecfdabf47
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] e65ff7566316d56ef2206d01aa05c5678d84b48aa0bcc79fc14ea7468764c573
[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" "e65ff7566316d56ef2206d01aa05c5678d84b48aa0bcc79fc14ea7468764c573", kill_on_drop: false }`
[INFO] [stderr]    Compiling safina-threadpool v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.01s
[INFO] running `Command { std: "docker" "inspect" "e65ff7566316d56ef2206d01aa05c5678d84b48aa0bcc79fc14ea7468764c573", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e65ff7566316d56ef2206d01aa05c5678d84b48aa0bcc79fc14ea7468764c573", kill_on_drop: false }`
[INFO] [stdout] e65ff7566316d56ef2206d01aa05c5678d84b48aa0bcc79fc14ea7468764c573
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5f14ee85559bd73f21ff5648c744d14420514f37bacc0a45af3eb1ca64a988fa
[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" "5f14ee85559bd73f21ff5648c744d14420514f37bacc0a45af3eb1ca64a988fa", kill_on_drop: false }`
[INFO] [stderr]    Compiling safina-threadpool v0.1.2
[INFO] [stderr]    Compiling safina-sync v0.1.3
[INFO] [stderr]    Compiling safina-timer v0.1.6
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/safina-timer-0.1.6/src/lib.rs:171:1
[INFO] [stdout]     |
[INFO] [stdout] 171 | #![feature(once_cell)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/safina-timer-0.1.6/src/lib.rs:172:1
[INFO] [stdout]     |
[INFO] [stdout] 172 | #![feature(wake_trait)]
[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 `safina-timer`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "5f14ee85559bd73f21ff5648c744d14420514f37bacc0a45af3eb1ca64a988fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f14ee85559bd73f21ff5648c744d14420514f37bacc0a45af3eb1ca64a988fa", kill_on_drop: false }`
[INFO] [stdout] 5f14ee85559bd73f21ff5648c744d14420514f37bacc0a45af3eb1ca64a988fa