[INFO] fetching crate finally 0.0.1...
[INFO] testing finally-0.0.1 against beta-2020-06-03 for beta-1.45-1
[INFO] extracting crate finally 0.0.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate finally 0.0.1 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 finally 0.0.1
[INFO] finished tweaking crates.io crate finally 0.0.1
[INFO] tweaked toml for crates.io crate finally 0.0.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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-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=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] 2d7a28942468908d64bf85627e03dfa8324b9dc3ad297572c54d778285327a45
[INFO] running `"docker" "start" "-a" "2d7a28942468908d64bf85627e03dfa8324b9dc3ad297572c54d778285327a45"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling finally v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr] error: cannot find attribute `unsafe_destructor` in this scope
[INFO] [stderr]   --> src/lib.rs:97:3
[INFO] [stderr]    |
[INFO] [stderr] 97 | #[unsafe_destructor]
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> src/lib.rs:34:1
[INFO] [stderr]    |
[INFO] [stderr] 34 | #![feature(unsafe_destructor)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `finally`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "2d7a28942468908d64bf85627e03dfa8324b9dc3ad297572c54d778285327a45"`
[INFO] running `"docker" "rm" "-f" "2d7a28942468908d64bf85627e03dfa8324b9dc3ad297572c54d778285327a45"`
[INFO] [stdout] 2d7a28942468908d64bf85627e03dfa8324b9dc3ad297572c54d778285327a45