[INFO] updating cached repository Lytigas/rio-thread-bench
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Lytigas/rio-thread-bench
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Lytigas/rio-thread-bench" "work/ex/beta-1.38-1/sources/1.37.0/gh/Lytigas/rio-thread-bench"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Lytigas/rio-thread-bench'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Lytigas/rio-thread-bench" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Lytigas/rio-thread-bench"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Lytigas/rio-thread-bench'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 03ad80b01b3340719552b06a3e71532e9f08fd59
[INFO] sha for GitHub repo Lytigas/rio-thread-bench: 03ad80b01b3340719552b06a3e71532e9f08fd59
[INFO] validating manifest of Lytigas/rio-thread-bench on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Lytigas/rio-thread-bench on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Lytigas/rio-thread-bench
[INFO] finished frobbing Lytigas/rio-thread-bench
[INFO] frobbed toml for Lytigas/rio-thread-bench written to work/ex/beta-1.38-1/sources/1.37.0/gh/Lytigas/rio-thread-bench/Cargo.toml
[INFO] started frobbing Lytigas/rio-thread-bench
[INFO] finished frobbing Lytigas/rio-thread-bench
[INFO] frobbed toml for Lytigas/rio-thread-bench written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Lytigas/rio-thread-bench/Cargo.toml
[INFO] crate Lytigas/rio-thread-bench already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing Lytigas/rio-thread-bench against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Lytigas/rio-thread-bench:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] aa96cf7cc135877f73668f1744915e064dfbd6cfe68bd0e0630293729d5eac45
[INFO] running `"docker" "start" "-a" "aa96cf7cc135877f73668f1744915e064dfbd6cfe68bd0e0630293729d5eac45"`
[INFO] [stderr]    Compiling bus v2.0.0
[INFO] [stderr]    Compiling crossbeam-deque v0.5.2
[INFO] [stderr]    Compiling crossbeam v0.4.1
[INFO] [stderr]    Compiling rust-pub-sub v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(test)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `self::test::Bencher`
[INFO] [stderr]    --> src/main.rs:104:5
[INFO] [stderr]     |
[INFO] [stderr] 104 | use self::test::Bencher;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::thread`
[INFO] [stderr]    --> src/main.rs:105:5
[INFO] [stderr]     |
[INFO] [stderr] 105 | use std::thread;
[INFO] [stderr]     |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::time::Duration`
[INFO] [stderr]    --> src/main.rs:106:5
[INFO] [stderr]     |
[INFO] [stderr] 106 | use std::time::Duration;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::sync::Mutex`
[INFO] [stderr]    --> src/main.rs:129:5
[INFO] [stderr]     |
[INFO] [stderr] 129 | use std::sync::Mutex;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::sync::RwLock`
[INFO] [stderr]    --> src/main.rs:205:5
[INFO] [stderr]     |
[INFO] [stderr] 205 | use std::sync::RwLock;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BusReader`, `Bus`
[INFO] [stderr]    --> src/main.rs:281:11
[INFO] [stderr]     |
[INFO] [stderr] 281 | use bus::{Bus, BusReader};
[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 `rust-pub-sub`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "aa96cf7cc135877f73668f1744915e064dfbd6cfe68bd0e0630293729d5eac45"`
[INFO] running `"docker" "rm" "-f" "aa96cf7cc135877f73668f1744915e064dfbd6cfe68bd0e0630293729d5eac45"`
[INFO] [stdout] aa96cf7cc135877f73668f1744915e064dfbd6cfe68bd0e0630293729d5eac45