[INFO] crate rust-rethinkdb 0.0.1 is already in cache
[INFO] testing rust-rethinkdb-0.0.1 against beta-2020-06-03 for beta-1.45-1
[INFO] extracting crate rust-rethinkdb 0.0.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate rust-rethinkdb 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 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-4/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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] f2d70328fd1f271afcf6b74dc07e913ca0536da79689fb9e8bfdbdfa66fad5ec
[INFO] running `"docker" "start" "-a" "f2d70328fd1f271afcf6b74dc07e913ca0536da79689fb9e8bfdbdfa66fad5ec"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling 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[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] warning: unused import: `std::thread`
[INFO] [stderr]  --> src/lib/client.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::thread;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Arc`, `Mutex`
[INFO] [stderr]  --> src/lib/client.rs:4:17
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::sync::{Arc, Mutex};
[INFO] [stderr]   |                 ^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rustc_serialize::json::Json`
[INFO] [stderr]  --> src/lib/test.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use rustc_serialize::json::Json;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::string::String`
[INFO] [stderr]  --> src/lib/test.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::string::String;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::BTreeMap`
[INFO] [stderr]  --> src/lib/test.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::collections::BTreeMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `RethinkDB`
[INFO] [stderr]  --> src/lib/test.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use RethinkDB;
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `api::*`
[INFO] [stderr]  --> src/lib/test.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use api::*;
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Read`
[INFO] [stderr]  --> src/lib/client.rs:7:40
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::io::{BufStream, Error, Write, Read, BufRead};
[INFO] [stderr]   |                                        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `BufRead`
[INFO] [stderr]  --> src/lib/client.rs:7:46
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::io::{BufStream, Error, Write, Read, BufRead};
[INFO] [stderr]   |                                              ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors; 9 warnings emitted
[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" "f2d70328fd1f271afcf6b74dc07e913ca0536da79689fb9e8bfdbdfa66fad5ec"`
[INFO] running `"docker" "rm" "-f" "f2d70328fd1f271afcf6b74dc07e913ca0536da79689fb9e8bfdbdfa66fad5ec"`
[INFO] [stdout] f2d70328fd1f271afcf6b74dc07e913ca0536da79689fb9e8bfdbdfa66fad5ec