[INFO] crate airmash-protocol-v5 0.0.4 is already in cache
[INFO] checking airmash-protocol-v5-0.0.4 against beta-2019-10-27 for pr-65897
[INFO] extracting crate airmash-protocol-v5 0.0.4 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate airmash-protocol-v5 0.0.4 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 airmash-protocol-v5 0.0.4
[INFO] finished tweaking crates.io crate airmash-protocol-v5 0.0.4
[INFO] tweaked toml for crates.io crate airmash-protocol-v5 0.0.4 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] 7d5f68e8630642b0da83c607a3dd1410a1cf05dd1dc3c8362642379538a1c73b
[INFO] running `"docker" "start" "-a" "7d5f68e8630642b0da83c607a3dd1410a1cf05dd1dc3c8362642379538a1c73b"`
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling dimensioned v0.7.0
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]     Checking generic-array v0.11.1
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling enum-primitive-derive v0.1.2
[INFO] [stderr]    Compiling derive_more v0.13.0
[INFO] [stderr]    Compiling specs-derive v0.4.0
[INFO] [stderr]     Checking airmash-protocol v0.3.0
[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/airmash-protocol-0.3.0/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(try_from, optin_builtin_traits)]
[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 `airmash-protocol`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "7d5f68e8630642b0da83c607a3dd1410a1cf05dd1dc3c8362642379538a1c73b"`
[INFO] running `"docker" "rm" "-f" "7d5f68e8630642b0da83c607a3dd1410a1cf05dd1dc3c8362642379538a1c73b"`
[INFO] [stdout] 7d5f68e8630642b0da83c607a3dd1410a1cf05dd1dc3c8362642379538a1c73b