[INFO] updating cached repository https://github.com/fin-ger/simple-raft-node
[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] 0ae32e1719b8164535b855207287b7cd248e1370
[INFO] testing fin-ger/simple-raft-node against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffin-ger%2Fsimple-raft-node" "/workspace/builds/worker-9/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fin-ger/simple-raft-node on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/fin-ger/simple-raft-node
[INFO] finished tweaking git repo https://github.com/fin-ger/simple-raft-node
[INFO] tweaked toml for git repo https://github.com/fin-ger/simple-raft-node written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/fin-ger/simple-raft-node already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "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=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" "+1.44.0" "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] 950332a343507dc2261859f08e369ad24f7fb16e2144344d07170a029c206ba8
[INFO] running `"docker" "start" "-a" "950332a343507dc2261859f08e369ad24f7fb16e2144344d07170a029c206ba8"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling libc v0.2.64
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.5
[INFO] [stderr]    Compiling scopeguard v1.0.0
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling slab v0.4.2
[INFO] [stderr]    Compiling nodrop v0.1.14
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling futures-sink-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling pin-utils v0.1.0-alpha.4
[INFO] [stderr]    Compiling futures-io-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling futures v0.1.29
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling slog v2.5.2
[INFO] [stderr]    Compiling protobuf v2.8.1
[INFO] [stderr]    Compiling regex-syntax v0.6.12
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling smallvec v0.6.10
[INFO] [stderr]    Compiling arc-swap v0.3.11
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling async-ready v3.0.0
[INFO] [stderr]    Compiling async-datagram v3.0.0
[INFO] [stderr]    Compiling take_mut v0.2.2
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]    Compiling serde v1.0.101
[INFO] [stderr]    Compiling hashbrown v0.5.0
[INFO] [stderr]    Compiling c_linked_list v1.1.1
[INFO] [stderr]    Compiling quick-error v1.2.2
[INFO] [stderr]    Compiling crossbeam-utils v0.6.6
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling lock_api v0.3.1
[INFO] [stderr]    Compiling futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling crossbeam-queue v0.1.2
[INFO] [stderr]    Compiling crossbeam-channel v0.3.9
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling slog-scope v4.1.2
[INFO] [stderr]    Compiling slog-async v2.3.0
[INFO] [stderr]    Compiling aho-corasick v0.7.6
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling num_cpus v1.10.1
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]    Compiling atty v0.2.13
[INFO] [stderr]    Compiling backtrace-sys v0.1.31
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling get_if_addrs v0.5.3
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling rmp v0.8.8
[INFO] [stderr]    Compiling memoffset v0.5.1
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling mio v0.6.19
[INFO] [stderr]    Compiling backtrace v0.3.38
[INFO] [stderr]    Compiling term v0.5.2
[INFO] [stderr]    Compiling chrono v0.4.9
[INFO] [stderr]    Compiling crossbeam-epoch v0.7.2
[INFO] [stderr]    Compiling regex v1.3.1
[INFO] [stderr]    Compiling crossbeam-deque v0.7.1
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling crossbeam v0.7.2
[INFO] [stderr]    Compiling slog-stdlog v4.0.0
[INFO] [stderr]    Compiling slog-term v2.4.1
[INFO] [stderr]    Compiling slog-envlogger v2.2.0
[INFO] [stderr]    Compiling protobuf-codegen v2.8.1
[INFO] [stderr]    Compiling futures-executor-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling futures-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling runtime-raw v0.3.0-alpha.5
[INFO] [stderr]    Compiling futures-timer v0.3.0
[INFO] [stderr]    Compiling juliex v0.3.0-alpha.8
[INFO] [stderr]    Compiling romio v0.3.0-alpha.10
[INFO] [stderr]    Compiling runtime-native v0.3.0-alpha.6
[INFO] [stderr]    Compiling synstructure v0.12.1
[INFO] [stderr]    Compiling protobuf-build v0.10.0
[INFO] [stderr]    Compiling serde_derive v1.0.101
[INFO] [stderr]    Compiling runtime-attributes v0.3.0-alpha.6
[INFO] [stderr]    Compiling raft-proto v0.6.0-alpha (https://github.com/pingcap/raft-rs#d0acd70a)
[INFO] [stderr]    Compiling runtime v0.3.0-alpha.7
[INFO] [stderr]    Compiling getset v0.0.7
[INFO] [stderr]    Compiling failure v0.1.6
[INFO] [stderr]    Compiling raft v0.6.0-alpha (https://github.com/pingcap/raft-rs#d0acd70a)
[INFO] [stderr]    Compiling rmp-serde v0.14.0
[INFO] [stderr]    Compiling simple-raft-node v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | / #![feature(
[INFO] [stderr] 2 | |     vec_remove_item,
[INFO] [stderr] 3 | |     drain_filter,
[INFO] [stderr] 4 | |     trait_alias,
[INFO] [stderr] 5 | |     fn_traits,
[INFO] [stderr] 6 | | )]
[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 `simple-raft-node`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "950332a343507dc2261859f08e369ad24f7fb16e2144344d07170a029c206ba8"`
[INFO] running `"docker" "rm" "-f" "950332a343507dc2261859f08e369ad24f7fb16e2144344d07170a029c206ba8"`
[INFO] [stdout] 950332a343507dc2261859f08e369ad24f7fb16e2144344d07170a029c206ba8