[INFO] crate regex_generate 0.2.1 is already in cache
[INFO] checking regex_generate-0.2.1 against beta-2019-10-27 for pr-65897
[INFO] extracting crate regex_generate 0.2.1 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate regex_generate 0.2.1 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 regex_generate 0.2.1
[INFO] finished tweaking crates.io crate regex_generate 0.2.1
[INFO] tweaked toml for crates.io crate regex_generate 0.2.1 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate regex_generate 0.2.1 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] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] 91973aacea5bc12c3c9f8ea5b6a7c18f95fa2ae18e6ea92d1b5668eb41d5d5a9
[INFO] running `"docker" "start" "-a" "91973aacea5bc12c3c9f8ea5b6a7c18f95fa2ae18e6ea92d1b5668eb41d5d5a9"`
[INFO] [stderr]     Checking getrandom v0.1.11
[INFO] [stderr]     Checking backtrace-sys v0.1.31
[INFO] [stderr]     Checking backtrace v0.3.35
[INFO] [stderr]     Checking rand_core v0.5.0
[INFO] [stderr]     Checking error-chain v0.12.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.0
[INFO] [stderr]     Checking regex_generate v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> benches/bench.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![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 `regex_generate`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "91973aacea5bc12c3c9f8ea5b6a7c18f95fa2ae18e6ea92d1b5668eb41d5d5a9"`
[INFO] running `"docker" "rm" "-f" "91973aacea5bc12c3c9f8ea5b6a7c18f95fa2ae18e6ea92d1b5668eb41d5d5a9"`
[INFO] [stdout] 91973aacea5bc12c3c9f8ea5b6a7c18f95fa2ae18e6ea92d1b5668eb41d5d5a9