[INFO] crate robo6502 0.3.2 is already in cache
[INFO] checking robo6502-0.3.2 against beta-2019-10-27 for pr-65897
[INFO] extracting crate robo6502 0.3.2 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate robo6502 0.3.2 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 robo6502 0.3.2
[INFO] finished tweaking crates.io crate robo6502 0.3.2
[INFO] tweaked toml for crates.io crate robo6502 0.3.2 written to /workspace/builds/worker-5/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] 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-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] aa49ab531530614e4ad6976cb6b137512ce0ad81f03bc81f0b25ed9c0b7c7014
[INFO] running `"docker" "start" "-a" "aa49ab531530614e4ad6976cb6b137512ce0ad81f03bc81f0b25ed9c0b7c7014"`
[INFO] [stderr]     Checking machine_int v0.1.4
[INFO] [stderr]     Checking robo6502 v0.3.2 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> examples/benchmark.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(duration_as_u128)]
[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 `robo6502`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "aa49ab531530614e4ad6976cb6b137512ce0ad81f03bc81f0b25ed9c0b7c7014"`
[INFO] running `"docker" "rm" "-f" "aa49ab531530614e4ad6976cb6b137512ce0ad81f03bc81f0b25ed9c0b7c7014"`
[INFO] [stdout] aa49ab531530614e4ad6976cb6b137512ce0ad81f03bc81f0b25ed9c0b7c7014