[INFO] crate redoxer 0.2.9 is already in cache
[INFO] checking redoxer-0.2.9 against beta-2019-10-27 for pr-65897
[INFO] extracting crate redoxer 0.2.9 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate redoxer 0.2.9 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 crates.io crate redoxer 0.2.9
[INFO] finished tweaking crates.io crate redoxer 0.2.9
[INFO] tweaked toml for crates.io crate redoxer 0.2.9 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate redoxer 0.2.9 already has a lockfile, it will not be regenerated
[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-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 8b81337a779ef1d7602e5d996845a39f49fe68c9c23bc172f02b769e04a009cd
[INFO] running `"docker" "start" "-a" "8b81337a779ef1d7602e5d996845a39f49fe68c9c23bc172f02b769e04a009cd"`
[INFO] [stderr]    Compiling serde v1.0.94
[INFO] [stderr]     Checking safemem v0.3.0
[INFO] [stderr]    Compiling redox_pkgutils v0.1.3
[INFO] [stderr]     Checking thread-scoped v1.0.2
[INFO] [stderr]     Checking opaque-debug v0.2.2
[INFO] [stderr]     Checking constant_time_eq v0.1.3
[INFO] [stderr]     Checking ordermap v0.2.13
[INFO] [stderr]     Checking bidir-map v0.6.0
[INFO] [stderr]     Checking redox_syscall v0.1.56
[INFO] [stderr]     Checking version-compare v0.0.4
[INFO] [stderr]     Checking arg_parser v0.1.0
[INFO] [stderr]    Compiling ring v0.13.5
[INFO] [stderr]    Compiling fuse v0.3.1
[INFO] [stderr]     Checking c2-chacha v0.2.2
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]    Compiling rand_chacha v0.2.0
[INFO] [stderr]     Checking getrandom v0.1.6
[INFO] [stderr]     Checking termion v1.5.3
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/redox_syscall-0.1.56/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(asm)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/redox_syscall-0.1.56/src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(const_fn)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Checking xattr v0.2.2
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]    Compiling err-derive v0.1.5
[INFO] [stderr]     Checking backtrace-sys v0.1.30
[INFO] [stderr]     Checking pbr v1.0.1
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `redox_syscall`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "8b81337a779ef1d7602e5d996845a39f49fe68c9c23bc172f02b769e04a009cd"`
[INFO] running `"docker" "rm" "-f" "8b81337a779ef1d7602e5d996845a39f49fe68c9c23bc172f02b769e04a009cd"`
[INFO] [stdout] 8b81337a779ef1d7602e5d996845a39f49fe68c9c23bc172f02b769e04a009cd