[INFO] crate rust-rethinkdb 0.0.1 is already in cache
[INFO] checking rust-rethinkdb-0.0.1 against beta-2019-10-27 for pr-65897
[INFO] extracting crate rust-rethinkdb 0.0.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate rust-rethinkdb 0.0.1 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 crates.io crate rust-rethinkdb 0.0.1
[INFO] finished tweaking crates.io crate rust-rethinkdb 0.0.1
[INFO] tweaked toml for crates.io crate rust-rethinkdb 0.0.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "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=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] d37a464d91a4b37686dffe5fe6fe6fe2d06869aa9055cb1d02f81f2b14a75fe8
[INFO] running `"docker" "start" "-a" "d37a464d91a4b37686dffe5fe6fe6fe2d06869aa9055cb1d02f81f2b14a75fe8"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking rust-rethinkdb v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0432]: unresolved import `std::io::BufStream`
[INFO] [stderr]  --> src/lib/client.rs:7:15
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::io::{BufStream, Error, Write, Read, BufRead};
[INFO] [stderr]   |               ^^^^^^^^^ no `BufStream` in `io`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `std::io::BufStream`
[INFO] [stderr]  --> src/lib/client.rs:7:15
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::io::{BufStream, Error, Write, Read, BufRead};
[INFO] [stderr]   |               ^^^^^^^^^ no `BufStream` in `io`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib/mod.rs:1:2
[INFO] [stderr]   |
[INFO] [stderr] 1 |  #![feature(core)]
[INFO] [stderr]   |  ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib/mod.rs:1:2
[INFO] [stderr]   |
[INFO] [stderr] 1 |  #![feature(core)]
[INFO] [stderr]   |  ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: could not compile `rust-rethinkdb`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: could not compile `rust-rethinkdb`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "d37a464d91a4b37686dffe5fe6fe6fe2d06869aa9055cb1d02f81f2b14a75fe8"`
[INFO] running `"docker" "rm" "-f" "d37a464d91a4b37686dffe5fe6fe6fe2d06869aa9055cb1d02f81f2b14a75fe8"`
[INFO] [stdout] d37a464d91a4b37686dffe5fe6fe6fe2d06869aa9055cb1d02f81f2b14a75fe8