[INFO] crate screenruster-saver-laughing_man 0.2.1 is already in cache
[INFO] testing screenruster-saver-laughing_man-0.2.1 against beta-2020-06-03 for beta-1.45-1
[INFO] extracting crate screenruster-saver-laughing_man 0.2.1 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate screenruster-saver-laughing_man 0.2.1 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 screenruster-saver-laughing_man 0.2.1
[INFO] finished tweaking crates.io crate screenruster-saver-laughing_man 0.2.1
[INFO] tweaked toml for crates.io crate screenruster-saver-laughing_man 0.2.1 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate screenruster-saver-laughing_man 0.2.1 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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] [stdout] a388af290228dda09ce39363a75f52d214bd0b3caa9c2b38e2c8508f695d3bfb
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "a388af290228dda09ce39363a75f52d214bd0b3caa9c2b38e2c8508f695d3bfb"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling cc v1.0.48
[INFO] [stderr]    Compiling khronos_api v3.1.0
[INFO] [stderr]    Compiling libm v0.1.4
[INFO] [stderr]    Compiling inflate v0.1.1
[INFO] [stderr]    Compiling exoquant v0.2.0
[INFO] [stderr]    Compiling takeable-option v0.4.0
[INFO] [stderr]    Compiling json v0.12.0
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling x11 v2.18.1
[INFO] [stderr]    Compiling getrandom v0.1.13
[INFO] [stderr]    Compiling num-complex v0.1.43
[INFO] [stderr]    Compiling approx v0.3.2
[INFO] [stderr]    Compiling generic-array v0.13.2
[INFO] [stderr]    Compiling crossbeam-channel v0.4.0
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling num-bigint v0.1.44
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]    Compiling rayon-core v1.7.0
[INFO] [stderr]    Compiling palette v0.2.1
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling gl_generator v0.11.0
[INFO] [stderr]    Compiling rand v0.7.2
[INFO] [stderr]    Compiling rayon v1.3.0
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling alga v0.9.2
[INFO] [stderr]    Compiling png v0.6.2
[INFO] [stderr]    Compiling miniz-sys v0.1.12
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling glium v0.25.1
[INFO] [stderr]    Compiling flate2 v0.2.20
[INFO] [stderr]    Compiling rand_distr v0.2.2
[INFO] [stderr]    Compiling backtrace v0.3.40
[INFO] [stderr]    Compiling imagefmt v4.0.0
[INFO] [stderr]    Compiling xyz v0.2.1
[INFO] [stderr]    Compiling nalgebra v0.19.0
[INFO] [stderr]    Compiling jpeg-decoder v0.1.18
[INFO] [stderr]    Compiling picto v0.4.3
[INFO] [stderr]    Compiling screenruster-saver v0.2.2
[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/screenruster-saver-0.2.2/src/lib.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | #![feature(type_ascription)]
[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 `screenruster-saver`.
[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" "a388af290228dda09ce39363a75f52d214bd0b3caa9c2b38e2c8508f695d3bfb"`
[INFO] running `"docker" "rm" "-f" "a388af290228dda09ce39363a75f52d214bd0b3caa9c2b38e2c8508f695d3bfb"`
[INFO] [stdout] a388af290228dda09ce39363a75f52d214bd0b3caa9c2b38e2c8508f695d3bfb