[INFO] crate rethinkdb 0.1.0 is already in cache
[INFO] testing rethinkdb-0.1.0 against beta-2020-06-03 for beta-1.45-1
[INFO] extracting crate rethinkdb 0.1.0 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate rethinkdb 0.1.0 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 rethinkdb 0.1.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate rethinkdb 0.1.0
[INFO] tweaked toml for crates.io crate rethinkdb 0.1.0 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Updating git repository `https://github.com/tomjakubowski/json_macros`
[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-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] [stdout] f3f5f4fb892a82341d818fb539c475ce840e3a5f09f624d4b382ca7a94a593f8
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "f3f5f4fb892a82341d818fb539c475ce840e3a5f09f624d4b382ca7a94a593f8"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rethinkdb v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: expected identifier, found keyword `mod`
[INFO] [stderr]  --> src/errors.rs:3:23
[INFO] [stderr]   |
[INFO] [stderr] 3 | use serialize::json::{mod, Json};
[INFO] [stderr]   |                       ^^^ expected identifier, found keyword
[INFO] [stderr]   |
[INFO] [stderr] help: you can escape reserved keywords to use them as identifiers
[INFO] [stderr]   |
[INFO] [stderr] 3 | use serialize::json::{r#mod, Json};
[INFO] [stderr]   |                       ^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: expected identifier, found keyword `mod`
[INFO] [stderr]  --> src/net/response.rs:4:21
[INFO] [stderr]   |
[INFO] [stderr] 4 | use errors::Error::{mod, ProtocolError};
[INFO] [stderr]   |                     ^^^ expected identifier, found keyword
[INFO] [stderr]   |
[INFO] [stderr] help: you can escape reserved keywords to use them as identifiers
[INFO] [stderr]   |
[INFO] [stderr] 4 | use errors::Error::{r#mod, ProtocolError};
[INFO] [stderr]   |                     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: expected identifier, found keyword `mod`
[INFO] [stderr]  --> src/query/mod.rs:1:23
[INFO] [stderr]   |
[INFO] [stderr] 1 | use serialize::json::{mod, ToJson};
[INFO] [stderr]   |                       ^^^ expected identifier, found keyword
[INFO] [stderr]   |
[INFO] [stderr] help: you can escape reserved keywords to use them as identifiers
[INFO] [stderr]   |
[INFO] [stderr] 1 | use serialize::json::{r#mod, ToJson};
[INFO] [stderr]   |                       ^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0463]: can't find crate for `serialize`
[INFO] [stderr]  --> src/lib.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | extern crate serialize;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0463`.
[INFO] [stderr] error: could not compile `rethinkdb`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "f3f5f4fb892a82341d818fb539c475ce840e3a5f09f624d4b382ca7a94a593f8"`
[INFO] running `"docker" "rm" "-f" "f3f5f4fb892a82341d818fb539c475ce840e3a5f09f624d4b382ca7a94a593f8"`
[INFO] [stdout] f3f5f4fb892a82341d818fb539c475ce840e3a5f09f624d4b382ca7a94a593f8