[INFO] cloning repository https://github.com/leo60228/perf-checkup
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/leo60228/perf-checkup" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleo60228%2Fperf-checkup", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleo60228%2Fperf-checkup'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 14bedc7b501e5e4b91e9b053465cdc92114a886e
[INFO] testing leo60228/perf-checkup against beta-2021-01-01 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleo60228%2Fperf-checkup" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/leo60228/perf-checkup 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 git repo https://github.com/leo60228/perf-checkup
[INFO] finished tweaking git repo https://github.com/leo60228/perf-checkup
[INFO] tweaked toml for git repo https://github.com/leo60228/perf-checkup written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/leo60228/perf-checkup already has a lockfile, it will not be regenerated
[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]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] 2eb1a60cb5e3bc658a31bc50846ab04723d7489b901d4bbcf0153c98900a8288
[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" "2eb1a60cb5e3bc658a31bc50846ab04723d7489b901d4bbcf0153c98900a8288", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2eb1a60cb5e3bc658a31bc50846ab04723d7489b901d4bbcf0153c98900a8288", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2eb1a60cb5e3bc658a31bc50846ab04723d7489b901d4bbcf0153c98900a8288", kill_on_drop: false }`
[INFO] [stdout] 2eb1a60cb5e3bc658a31bc50846ab04723d7489b901d4bbcf0153c98900a8288
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] aea45804bc3ef685785e7f17d35736e458f0aaff4a2742e09b0ffe43251dfcf8
[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" "aea45804bc3ef685785e7f17d35736e458f0aaff4a2742e09b0ffe43251dfcf8", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.60
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling futures-core-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling futures-io-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling pin-utils v0.1.0-alpha.4
[INFO] [stderr]    Compiling spin v0.5.1
[INFO] [stderr]    Compiling syn v0.15.42
[INFO] [stderr]    Compiling log v0.4.7
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]    Compiling scopeguard v1.0.0
[INFO] [stderr]    Compiling cc v1.0.38
[INFO] [stderr]    Compiling heim-common v0.0.5
[INFO] [stderr]    Compiling tokio-executor v0.2.0-alpha.1
[INFO] [stderr]    Compiling arrayvec v0.4.11
[INFO] [stderr]    Compiling smallvec v0.6.10
[INFO] [stderr]    Compiling doc-comment v0.3.1
[INFO] [stderr]    Compiling heim-host v0.0.5
[INFO] [stderr]    Compiling ucd-util v0.1.5
[INFO] [stderr]    Compiling rustc-demangle v0.1.15
[INFO] [stderr]    Compiling macaddr v0.1.1
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling platforms v0.2.0
[INFO] [stderr]    Compiling utf8-ranges v1.0.3
[INFO] [stderr]    Compiling lock_api v0.3.1
[INFO] [stderr]    Compiling libdbus-sys v0.2.0
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling futures-sink-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling regex-syntax v0.6.10
[INFO] [stderr]    Compiling crossbeam-utils v0.6.6
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling tracing-core v0.1.4
[INFO] [stderr]    Compiling memoffset v0.5.1
[INFO] [stderr]    Compiling futures-channel-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling crossbeam-queue v0.1.2
[INFO] [stderr]    Compiling crossbeam-channel v0.3.9
[INFO] [stderr]    Compiling futures-util-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling aho-corasick v0.7.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.7.2
[INFO] [stderr]    Compiling backtrace-sys v0.1.31
[INFO] [stderr]    Compiling raw-cpuid v6.1.0
[INFO] [stderr]    Compiling num_cpus v1.10.1
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling dbus v0.6.5
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling tokio-current-thread v0.2.0-alpha.1
[INFO] [stderr]    Compiling crossbeam-deque v0.7.1
[INFO] [stderr]    Compiling mio v0.6.19
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling tokio-io v0.2.0-alpha.1
[INFO] [stderr]    Compiling tokio-codec v0.2.0-alpha.1
[INFO] [stderr]    Compiling backtrace v0.3.33
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling regex v1.2.0
[INFO] [stderr]    Compiling futures-executor-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling tokio-sync v0.2.0-alpha.1
[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.1/src/lib.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(async_await)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling futures-preview v0.3.0-alpha.17
[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" "aea45804bc3ef685785e7f17d35736e458f0aaff4a2742e09b0ffe43251dfcf8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aea45804bc3ef685785e7f17d35736e458f0aaff4a2742e09b0ffe43251dfcf8", kill_on_drop: false }`
[INFO] [stdout] aea45804bc3ef685785e7f17d35736e458f0aaff4a2742e09b0ffe43251dfcf8