[INFO] updating cached repository LazyBun/buzzer-server
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/LazyBun/buzzer-server
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/LazyBun/buzzer-server" "work/ex/beta-1.38-1/sources/1.37.0/gh/LazyBun/buzzer-server"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/LazyBun/buzzer-server'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/LazyBun/buzzer-server" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/LazyBun/buzzer-server"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/LazyBun/buzzer-server'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 850e08e4b8daea6619c8768e7b713184b916d870
[INFO] sha for GitHub repo LazyBun/buzzer-server: 850e08e4b8daea6619c8768e7b713184b916d870
[INFO] validating manifest of LazyBun/buzzer-server 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 LazyBun/buzzer-server 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 LazyBun/buzzer-server
[INFO] finished frobbing LazyBun/buzzer-server
[INFO] frobbed toml for LazyBun/buzzer-server written to work/ex/beta-1.38-1/sources/1.37.0/gh/LazyBun/buzzer-server/Cargo.toml
[INFO] started frobbing LazyBun/buzzer-server
[INFO] finished frobbing LazyBun/buzzer-server
[INFO] frobbed toml for LazyBun/buzzer-server written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/LazyBun/buzzer-server/Cargo.toml
[INFO] crate LazyBun/buzzer-server 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing LazyBun/buzzer-server 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/LazyBun/buzzer-server:/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] 7efd185c62b7138296f8527d219176cf03a0a80eecb6a73e8a4c636bcb8ecdb5
[INFO] running `"docker" "start" "-a" "7efd185c62b7138296f8527d219176cf03a0a80eecb6a73e8a4c636bcb8ecdb5"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling term_size v0.3.0
[INFO] [stderr]    Compiling memchr v1.0.1
[INFO] [stderr]    Compiling net2 v0.2.31
[INFO] [stderr]    Compiling structopt-derive v0.1.1
[INFO] [stderr]    Compiling aho-corasick v0.6.3
[INFO] [stderr]    Compiling textwrap v0.8.0
[INFO] [stderr]    Compiling mio v0.6.10
[INFO] [stderr]    Compiling clap v2.26.2
[INFO] [stderr]    Compiling regex v0.2.2
[INFO] [stderr]    Compiling ws v0.7.3
[INFO] [stderr]    Compiling local-ip v0.2.0 (https://github.com/AndyGauge/rust-local-ip.git#9bebf333)
[INFO] [stderr]    Compiling structopt v0.1.1
[INFO] [stderr]    Compiling buzzer-server v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `TryRecvError`
[INFO] [stderr]  --> src/main.rs:3:29
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::sync::mpsc::{self, TryRecvError};
[INFO] [stderr]   |                             ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::Write`
[INFO] [stderr]   --> src/main.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::io::Write;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::Read`
[INFO] [stderr]   --> src/main.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | use std::io::Read;
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ws`
[INFO] [stderr]   --> src/main.rs:45:9
[INFO] [stderr]    |
[INFO] [stderr] 45 |     let ws = thread::spawn(move || {
[INFO] [stderr]    |         ^^ help: consider prefixing with an underscore: `_ws`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:58:33
[INFO] [stderr]    |
[INFO] [stderr] 58 |                                 sender.send(msg);
[INFO] [stderr]    |                                 ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 36.12s
[INFO] running `"docker" "inspect" "7efd185c62b7138296f8527d219176cf03a0a80eecb6a73e8a4c636bcb8ecdb5"`
[INFO] running `"docker" "rm" "-f" "7efd185c62b7138296f8527d219176cf03a0a80eecb6a73e8a4c636bcb8ecdb5"`
[INFO] [stdout] 7efd185c62b7138296f8527d219176cf03a0a80eecb6a73e8a4c636bcb8ecdb5
[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/LazyBun/buzzer-server:/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] 0f16380ab78eed4a205b7c762ca1034b68e9de0212a1e51e7bcdc71bd0c339da
[INFO] running `"docker" "start" "-a" "0f16380ab78eed4a205b7c762ca1034b68e9de0212a1e51e7bcdc71bd0c339da"`
[INFO] [stderr]    Compiling buzzer-server v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `TryRecvError`
[INFO] [stderr]  --> src/main.rs:3:29
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::sync::mpsc::{self, TryRecvError};
[INFO] [stderr]   |                             ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::Write`
[INFO] [stderr]   --> src/main.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::io::Write;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::Read`
[INFO] [stderr]   --> src/main.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | use std::io::Read;
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ws`
[INFO] [stderr]   --> src/main.rs:45:9
[INFO] [stderr]    |
[INFO] [stderr] 45 |     let ws = thread::spawn(move || {
[INFO] [stderr]    |         ^^ help: consider prefixing with an underscore: `_ws`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:58:33
[INFO] [stderr]    |
[INFO] [stderr] 58 |                                 sender.send(msg);
[INFO] [stderr]    |                                 ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.35s
[INFO] running `"docker" "inspect" "0f16380ab78eed4a205b7c762ca1034b68e9de0212a1e51e7bcdc71bd0c339da"`
[INFO] running `"docker" "rm" "-f" "0f16380ab78eed4a205b7c762ca1034b68e9de0212a1e51e7bcdc71bd0c339da"`
[INFO] [stdout] 0f16380ab78eed4a205b7c762ca1034b68e9de0212a1e51e7bcdc71bd0c339da
[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/LazyBun/buzzer-server:/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" "test" "--frozen"`
[INFO] [stdout] a0dff74edae1671534d2df4d37dc1786298590fb447148f3204953b315b91fee
[INFO] running `"docker" "start" "-a" "a0dff74edae1671534d2df4d37dc1786298590fb447148f3204953b315b91fee"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.13s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/buzzer_server-b203b63b2d5ed4f2
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "a0dff74edae1671534d2df4d37dc1786298590fb447148f3204953b315b91fee"`
[INFO] running `"docker" "rm" "-f" "a0dff74edae1671534d2df4d37dc1786298590fb447148f3204953b315b91fee"`
[INFO] [stdout] a0dff74edae1671534d2df4d37dc1786298590fb447148f3204953b315b91fee