[INFO] cloning repository https://github.com/raskchanky/candida
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/raskchanky/candida" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fraskchanky%2Fcandida", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fraskchanky%2Fcandida'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9c48df0e069bf91f4dbe3c94db7e9aeb2d9bff5d
[INFO] testing raskchanky/candida against beta-2020-07-24 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fraskchanky%2Fcandida" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/raskchanky/candida on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/raskchanky/candida
[INFO] finished tweaking git repo https://github.com/raskchanky/candida
[INFO] tweaked toml for git repo https://github.com/raskchanky/candida written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/raskchanky/candida already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tokio-sync v0.2.0-alpha.2
[INFO] [stderr]   Downloaded tokio-net v0.2.0-alpha.2
[INFO] [stderr]   Downloaded tokio-io v0.2.0-alpha.2
[INFO] [stderr]   Downloaded tokio-executor v0.2.0-alpha.2
[INFO] [stderr]   Downloaded tokio-codec v0.2.0-alpha.2
[INFO] [stderr]   Downloaded tokio-macros v0.2.0-alpha.2
[INFO] [stderr]   Downloaded tracing-attributes v0.1.2
[INFO] [stderr]   Downloaded tracing-core v0.1.5
[INFO] [stderr]   Downloaded tokio v0.2.0-alpha.2
[INFO] [stderr]   Downloaded tokio-timer v0.3.0-alpha.2
[INFO] [stderr]   Downloaded tokio-fs v0.2.0-alpha.2
[INFO] [stderr]   Downloaded tracing v0.1.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b71a48f1790474c9e515fe274a7174ee48f169454625899c5b502bcddc8b57a8
[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" "b71a48f1790474c9e515fe274a7174ee48f169454625899c5b502bcddc8b57a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b71a48f1790474c9e515fe274a7174ee48f169454625899c5b502bcddc8b57a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b71a48f1790474c9e515fe274a7174ee48f169454625899c5b502bcddc8b57a8", kill_on_drop: false }`
[INFO] [stdout] b71a48f1790474c9e515fe274a7174ee48f169454625899c5b502bcddc8b57a8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "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] 314ec7a05419022d9094d6ce1323113b1e7c900a34e3ebd686f42667333c7e18
[INFO] running `Command { std: "docker" "start" "-a" "314ec7a05419022d9094d6ce1323113b1e7c900a34e3ebd686f42667333c7e18", kill_on_drop: false }`
[INFO] [stderr]    Compiling spin v0.5.1
[INFO] [stderr]    Compiling futures-core-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling arrayvec v0.4.11
[INFO] [stderr]    Compiling proc-macro2 v1.0.1
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling smallvec v0.6.10
[INFO] [stderr]    Compiling memoffset v0.5.1
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling crossbeam-utils v0.6.6
[INFO] [stderr]    Compiling tracing-core v0.1.5
[INFO] [stderr]    Compiling futures-sink-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling futures-util-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling mio v0.6.19
[INFO] [stderr]    Compiling crossbeam-channel v0.3.9
[INFO] [stderr]    Compiling crossbeam-queue v0.1.2
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.7.2
[INFO] [stderr]    Compiling tokio-io v0.2.0-alpha.2
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling crossbeam-deque v0.7.1
[INFO] [stderr]    Compiling tokio-codec v0.2.0-alpha.2
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling tokio-sync v0.2.0-alpha.2
[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/tokio-sync-0.2.0-alpha.2/src/lib.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![feature(async_await)]
[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 `tokio-sync`.
[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" "314ec7a05419022d9094d6ce1323113b1e7c900a34e3ebd686f42667333c7e18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "314ec7a05419022d9094d6ce1323113b1e7c900a34e3ebd686f42667333c7e18", kill_on_drop: false }`
[INFO] [stdout] 314ec7a05419022d9094d6ce1323113b1e7c900a34e3ebd686f42667333c7e18