[INFO] updating cached repository https://github.com/c2hub/pebble
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0200072dbc79f1b2a01c912a72732af19c8c8be6
[INFO] checking c2hub/pebble against beta-2019-10-27 for pr-65897
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fc2hub%2Fpebble" "/workspace/builds/worker-0/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/c2hub/pebble 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 git repo https://github.com/c2hub/pebble
[INFO] finished tweaking git repo https://github.com/c2hub/pebble
[INFO] tweaked toml for git repo https://github.com/c2hub/pebble written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/c2hub/pebble 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] [stdout] 61d79e614212e76d2b51d6e7493f828109191700a6de7e0f975abad397bb572e
[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" "61d79e614212e76d2b51d6e7493f828109191700a6de7e0f975abad397bb572e"`
[INFO] [stderr]    Compiling gcc v0.3.50
[INFO] [stderr]     Checking serde v1.0.4
[INFO] [stderr]     Checking podio v0.1.5
[INFO] [stderr]     Checking recipe-reader v0.9.11
[INFO] [stderr]     Checking lzf v0.3.1
[INFO] [stderr]     Checking version-compare v0.0.4
[INFO] [stderr]     Checking atty v0.2.2
[INFO] [stderr]     Checking num_cpus v1.5.0
[INFO] [stderr]     Checking term_size v0.3.0
[INFO] [stderr]     Checking unicode-bidi v0.3.3
[INFO] [stderr]     Checking msdos_time v0.1.5
[INFO] [stderr]    Compiling hyper v0.10.11
[INFO] [stderr]    Compiling serde_derive_internals v0.15.0
[INFO] [stderr]     Checking pbr v1.0.0
[INFO] [stderr]     Checking clap v2.24.2
[INFO] [stderr]     Checking idna v0.1.2
[INFO] [stderr]    Compiling miniz-sys v0.1.9
[INFO] [stderr]    Compiling bzip2-sys v0.1.5
[INFO] [stderr]    Compiling serde_derive v1.0.4
[INFO] [stderr]     Checking url v1.4.1
[INFO] [stderr]     Checking flate2 v0.2.19
[INFO] [stderr]     Checking bzip2 v0.3.2
[INFO] [stderr]     Checking zip v0.2.3
[INFO] [stderr]     Checking serde_bytes v0.10.0
[INFO] [stderr]     Checking toml v0.4.1
[INFO] [stderr]     Checking serde_cbor v0.6.0
[INFO] [stderr]     Checking pebble v0.8.15 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(vec_remove_item)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(vec_remove_item)]
[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 `pebble`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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 `pebble`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "61d79e614212e76d2b51d6e7493f828109191700a6de7e0f975abad397bb572e"`
[INFO] running `"docker" "rm" "-f" "61d79e614212e76d2b51d6e7493f828109191700a6de7e0f975abad397bb572e"`
[INFO] [stdout] 61d79e614212e76d2b51d6e7493f828109191700a6de7e0f975abad397bb572e