[INFO] updating cached repository https://github.com/Lymia/sylph-verifier
[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] cedef3f5ad02c9c9eee488b7b453e773d5b1e45b
[INFO] checking Lymia/sylph-verifier against beta-2019-10-27 for pr-65897
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLymia%2Fsylph-verifier" "/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/Lymia/sylph-verifier 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/Lymia/sylph-verifier
[INFO] finished tweaking git repo https://github.com/Lymia/sylph-verifier
[INFO] tweaked toml for git repo https://github.com/Lymia/sylph-verifier written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/Lymia/sylph-verifier 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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f9b2ea39f617efab07e6474a076a51e8c306ebe3bae1bca762abcadc467a2818
[INFO] running `"docker" "start" "-a" "f9b2ea39f617efab07e6474a076a51e8c306ebe3bae1bca762abcadc467a2818"`
[INFO] [stderr]     Checking nodrop v0.1.13
[INFO] [stderr]    Compiling openssl v0.9.24 (https://github.com/Lymia/rust-openssl?branch=0.9.x#3b73dda4)
[INFO] [stderr]     Checking ego-tree v0.6.0
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling libssh2-sys v0.2.12
[INFO] [stderr]    Compiling curl-sys v0.4.21
[INFO] [stderr]    Compiling libgit2-sys v0.7.11
[INFO] [stderr]    Compiling libsqlite3-sys v0.9.3
[INFO] [stderr]    Compiling lz4-sys v1.8.3
[INFO] [stderr]     Checking smallstr v0.1.0
[INFO] [stderr]     Checking fs2 v0.4.3
[INFO] [stderr]    Compiling openssl-sys v0.9.49
[INFO] [stderr]     Checking base64 v0.8.0
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking uuid v0.6.5
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]     Checking openssl v0.10.24
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking flate2 v1.0.11
[INFO] [stderr]     Checking nix v0.7.0
[INFO] [stderr]    Compiling display_derive v1.0.0 (https://github.com/withoutboats/display_derive#5d6bac2f)
[INFO] [stderr]    Compiling failure_derive v1.0.0 (https://github.com/withoutboats/failure.git#514aa258)
[INFO] [stderr]     Checking uuid v0.5.1
[INFO] [stderr]     Checking arrayvec v0.4.11
[INFO] [stderr]     Checking servo_arc v0.1.1
[INFO] [stderr]     Checking parking_lot_core v0.5.0
[INFO] [stderr]     Checking parking_lot_core v0.2.14
[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/parking_lot_core-0.2.14/src/lib.rs:41:60
[INFO] [stderr]    |
[INFO] [stderr] 41 | #![cfg_attr(all(feature = "nightly", target_os = "linux"), feature(integer_atomics))]
[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 `parking_lot_core`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "f9b2ea39f617efab07e6474a076a51e8c306ebe3bae1bca762abcadc467a2818"`
[INFO] running `"docker" "rm" "-f" "f9b2ea39f617efab07e6474a076a51e8c306ebe3bae1bca762abcadc467a2818"`
[INFO] [stdout] f9b2ea39f617efab07e6474a076a51e8c306ebe3bae1bca762abcadc467a2818