[INFO] crate cpclib-basic 0.4.1-alpha is already in cache
[INFO] testing cpclib-basic-0.4.1-alpha against beta-2020-06-03 for beta-1.45-1
[INFO] extracting crate cpclib-basic 0.4.1-alpha into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate cpclib-basic 0.4.1-alpha on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate cpclib-basic 0.4.1-alpha
[INFO] finished tweaking crates.io crate cpclib-basic 0.4.1-alpha
[INFO] tweaked toml for crates.io crate cpclib-basic 0.4.1-alpha written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate cpclib-basic 0.4.1-alpha already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[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=warn" "-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-2020-06-03" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 3e2a9a26ac267614fd6f514e032dc488ad02b2ea2dbbf3ccf1fb24ca1fd65f05
[INFO] running `"docker" "start" "-a" "3e2a9a26ac267614fd6f514e032dc488ad02b2ea2dbbf3ccf1fb24ca1fd65f05"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling syn v1.0.18
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling cc v1.0.52
[INFO] [stderr]    Compiling ryu v1.0.4
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling proc-macro-hack v0.5.15
[INFO] [stderr]    Compiling static_assertions v0.3.4
[INFO] [stderr]    Compiling bitsets v0.1.1
[INFO] [stderr]    Compiling strsim v0.9.3
[INFO] [stderr]    Compiling arrayref v0.3.6
[INFO] [stderr]    Compiling custom_error v1.7.1
[INFO] [stderr]    Compiling bitfield v0.13.2
[INFO] [stderr]    Compiling nom v5.1.1
[INFO] [stderr]    Compiling backtrace-sys v0.1.36
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling chrono v0.4.11
[INFO] [stderr]    Compiling backtrace v0.3.46
[INFO] [stderr]    Compiling delegate v0.3.0
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]    Compiling derivative v2.1.1
[INFO] [stderr]    Compiling paste-impl v0.1.10
[INFO] [stderr]    Compiling failure_derive v0.1.7
[INFO] [stderr]    Compiling remain v0.2.1
[INFO] [stderr]    Compiling getset v0.0.9
[INFO] [stderr]    Compiling paste v0.1.10
[INFO] [stderr]    Compiling failure v0.1.7
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling toml v0.5.6
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling lexical-core v0.6.2
[INFO] [stderr]    Compiling cargo-lock v4.0.1
[INFO] [stderr]    Compiling proc-macro-crate v0.1.4
[INFO] [stderr]    Compiling num_enum_derive v0.4.3
[INFO] [stderr]    Compiling built v0.4.1
[INFO] [stderr]    Compiling cpclib-sna v0.4.1-alpha
[INFO] [stderr]    Compiling cpclib-tokens v0.4.1-alpha
[INFO] [stderr]    Compiling cpclib-disc v0.4.1-alpha
[INFO] [stderr]    Compiling cpclib-basic v0.4.1-alpha (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling num_enum v0.4.3
[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/cpclib-sna-0.4.1-alpha/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(vec_drain_as_slice)]
[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 `cpclib-sna`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "3e2a9a26ac267614fd6f514e032dc488ad02b2ea2dbbf3ccf1fb24ca1fd65f05"`
[INFO] running `"docker" "rm" "-f" "3e2a9a26ac267614fd6f514e032dc488ad02b2ea2dbbf3ccf1fb24ca1fd65f05"`
[INFO] [stdout] 3e2a9a26ac267614fd6f514e032dc488ad02b2ea2dbbf3ccf1fb24ca1fd65f05