[INFO] cloning repository https://github.com/PonasKovas/mc_afk_bot
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/PonasKovas/mc_afk_bot" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPonasKovas%2Fmc_afk_bot", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPonasKovas%2Fmc_afk_bot'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e01085d693f0166ed9e35a815c8c90949bc375f2
[INFO] testing PonasKovas/mc_afk_bot 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%2FPonasKovas%2Fmc_afk_bot" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/PonasKovas/mc_afk_bot 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/PonasKovas/mc_afk_bot
[INFO] finished tweaking git repo https://github.com/PonasKovas/mc_afk_bot
[INFO] tweaked toml for git repo https://github.com/PonasKovas/mc_afk_bot written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/PonasKovas/mc_afk_bot 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]  Downloading crates ...
[INFO] [stderr]   Downloaded signal-hook-registry v1.2.2
[INFO] [stderr]   Downloaded instant v0.1.8
[INFO] [stderr]   Downloaded tokio v0.3.4
[INFO] [stderr]   Downloaded bimap v0.5.3
[INFO] [stderr]   Downloaded mio v0.7.6
[INFO] [stderr]   Downloaded bytes v0.6.0
[INFO] [stderr]   Downloaded tokio-macros v0.3.1
[INFO] [stderr]   Downloaded fltk v0.11.4
[INFO] [stderr]   Downloaded fltk-derive v0.11.4
[INFO] [stderr]   Downloaded fltk-sys v0.11.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] c80102c028586fdd75a18520ae47d26b509d5f1dbd21a01ac8eb098909782566
[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" "c80102c028586fdd75a18520ae47d26b509d5f1dbd21a01ac8eb098909782566", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c80102c028586fdd75a18520ae47d26b509d5f1dbd21a01ac8eb098909782566", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c80102c028586fdd75a18520ae47d26b509d5f1dbd21a01ac8eb098909782566", kill_on_drop: false }`
[INFO] [stdout] c80102c028586fdd75a18520ae47d26b509d5f1dbd21a01ac8eb098909782566
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] b03bbab62a3b5bb9618eda08cbf3caaddad0dd03a10d505e72537d8bcb489bdc
[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" "b03bbab62a3b5bb9618eda08cbf3caaddad0dd03a10d505e72537d8bcb489bdc", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling cc v1.0.62
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling syn v1.0.53
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling smallvec v1.4.2
[INFO] [stderr]    Compiling adler v0.2.3
[INFO] [stderr]    Compiling futures v0.1.30
[INFO] [stderr]    Compiling bytes v0.6.0
[INFO] [stderr]    Compiling pin-project-lite v0.2.0
[INFO] [stderr]    Compiling futures-core v0.3.8
[INFO] [stderr]    Compiling bimap v0.5.3
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling instant v0.1.8
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]    Compiling tokio v0.3.4
[INFO] [stderr]    Compiling lock_api v0.4.1
[INFO] [stderr]    Compiling cmake v0.1.45
[INFO] [stderr]    Compiling libz-sys v1.1.2
[INFO] [stderr]    Compiling fltk-sys v0.11.4
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling parking_lot_core v0.8.0
[INFO] [stderr]    Compiling mio v0.7.6
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling signal-hook-registry v1.2.2
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling parking_lot v0.11.0
[INFO] [stderr]    Compiling tokio-io v0.1.13
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling flate2 v1.0.19
[INFO] [stderr]    Compiling fltk-derive v0.11.4
[INFO] [stderr]    Compiling tokio-macros v0.3.1
[INFO] [stderr]    Compiling async-trait v0.1.41
[INFO] [stderr]    Compiling fltk v0.11.4
[INFO] [stderr]    Compiling mc_afk_bot v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(future_poll_fn)]
[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 `mc_afk_bot`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "b03bbab62a3b5bb9618eda08cbf3caaddad0dd03a10d505e72537d8bcb489bdc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b03bbab62a3b5bb9618eda08cbf3caaddad0dd03a10d505e72537d8bcb489bdc", kill_on_drop: false }`
[INFO] [stdout] b03bbab62a3b5bb9618eda08cbf3caaddad0dd03a10d505e72537d8bcb489bdc