[INFO] crate casperlabs-engine-wasm-prep 0.5.0 is already in cache
[INFO] testing casperlabs-engine-wasm-prep-0.5.0 against beta-2020-06-03 for beta-1.45-1
[INFO] extracting crate casperlabs-engine-wasm-prep 0.5.0 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate casperlabs-engine-wasm-prep 0.5.0 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 casperlabs-engine-wasm-prep 0.5.0
[INFO] finished tweaking crates.io crate casperlabs-engine-wasm-prep 0.5.0
[INFO] tweaked toml for crates.io crate casperlabs-engine-wasm-prep 0.5.0 written to /workspace/builds/worker-13/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-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] 45782f4ee0aa59d1da8b29f56765d612c6ad8dbdd5536eeb18f4766f8bf0e1cf
[INFO] running `"docker" "start" "-a" "45782f4ee0aa59d1da8b29f56765d612c6ad8dbdd5536eeb18f4766f8bf0e1cf"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling static_assertions v1.1.0
[INFO] [stderr]    Compiling rustc-hex v2.1.0
[INFO] [stderr]    Compiling base16 v0.2.1
[INFO] [stderr]    Compiling hex_fmt v0.3.0
[INFO] [stderr]    Compiling parity-wasm v0.41.0
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling digest v0.8.1
[INFO] [stderr]    Compiling wait-timeout v0.2.0
[INFO] [stderr]    Compiling num-derive v0.3.0
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]    Compiling blake2 v0.8.1
[INFO] [stderr]    Compiling rusty-fork v0.2.2
[INFO] [stderr]    Compiling uint v0.8.3
[INFO] [stderr]    Compiling proptest v0.9.6
[INFO] [stderr]    Compiling casperlabs-types v0.5.0
[INFO] [stderr]    Compiling pwasm-utils v0.12.0
[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/casperlabs-types-0.5.0/src/lib.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | #![feature(specialization, try_reserve)]
[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 `casperlabs-types`.
[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" "45782f4ee0aa59d1da8b29f56765d612c6ad8dbdd5536eeb18f4766f8bf0e1cf"`
[INFO] running `"docker" "rm" "-f" "45782f4ee0aa59d1da8b29f56765d612c6ad8dbdd5536eeb18f4766f8bf0e1cf"`
[INFO] [stdout] 45782f4ee0aa59d1da8b29f56765d612c6ad8dbdd5536eeb18f4766f8bf0e1cf