[INFO] updating cached repository https://github.com/oliver-giersch/rayon-demo-fork
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d1c4e7ce21b7f95116625cfbacdc1bd824f07926
[INFO] checking oliver-giersch/rayon-demo-fork against beta-2019-10-27 for pr-65897
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Foliver-giersch%2Frayon-demo-fork" "/workspace/builds/worker-14/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/oliver-giersch/rayon-demo-fork on toolchain beta-2019-10-27
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/oliver-giersch/rayon-demo-fork
[INFO] finished tweaking git repo https://github.com/oliver-giersch/rayon-demo-fork
[INFO] tweaked toml for git repo https://github.com/oliver-giersch/rayon-demo-fork written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/oliver-giersch/rayon`
[INFO] [stderr]     Updating git repository `https://github.com/oliver-giersch/crossbeam-deque-0-7-1-fork`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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=allow" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-10-27" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 19f6f9bb82eb7ee3d05986c635c8994f1d11fac81a8f853eb6ac411d9d8c522e
[INFO] running `"docker" "start" "-a" "19f6f9bb82eb7ee3d05986c635c8994f1d11fac81a8f853eb6ac411d9d8c522e"`
[INFO] [stderr]    Compiling rayon-core v1.5.0 (https://github.com/oliver-giersch/rayon?branch=with_epoch#a45e5b71)
[INFO] [stderr]     Checking unchecked-index v0.2.2
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]     Checking rawslice v0.1.0
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]    Compiling glium v0.24.0
[INFO] [stderr]     Checking crossbeam-deque v0.7.1 (https://github.com/oliver-giersch/crossbeam-deque-0-7-1-fork?branch=with_epoch#810ec037)
[INFO] [stderr]     Checking docopt v1.1.0
[INFO] [stderr]     Checking odds v0.3.1
[INFO] [stderr]     Checking rusttype v0.8.1
[INFO] [stderr]     Checking cgmath v0.17.0
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]     Checking rusttype v0.7.9
[INFO] [stderr]     Checking andrew v0.2.1
[INFO] [stderr]     Checking rayon v1.1.0 (https://github.com/oliver-giersch/rayon?branch=with_epoch#a45e5b71)
[INFO] [stderr]     Checking smithay-client-toolkit v0.4.6
[INFO] [stderr]     Checking winit v0.19.4
[INFO] [stderr]     Checking glutin v0.20.1
[INFO] [stderr]     Checking rayon-demo v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:19
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![cfg_attr(test, feature(test))]
[INFO] [stderr]   |                   ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `rayon-demo`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "19f6f9bb82eb7ee3d05986c635c8994f1d11fac81a8f853eb6ac411d9d8c522e"`
[INFO] running `"docker" "rm" "-f" "19f6f9bb82eb7ee3d05986c635c8994f1d11fac81a8f853eb6ac411d9d8c522e"`
[INFO] [stdout] 19f6f9bb82eb7ee3d05986c635c8994f1d11fac81a8f853eb6ac411d9d8c522e