[INFO] updating cached repository DogLi/mio_test
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/DogLi/mio_test
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/DogLi/mio_test" "work/ex/beta-1.38-1/sources/1.37.0/gh/DogLi/mio_test"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/DogLi/mio_test'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/DogLi/mio_test" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/DogLi/mio_test"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/DogLi/mio_test'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b28a1ab7a10cf1da28f04d9ec2611c97ae424a85
[INFO] sha for GitHub repo DogLi/mio_test: b28a1ab7a10cf1da28f04d9ec2611c97ae424a85
[INFO] validating manifest of DogLi/mio_test 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 DogLi/mio_test 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 DogLi/mio_test
[INFO] finished frobbing DogLi/mio_test
[INFO] frobbed toml for DogLi/mio_test written to work/ex/beta-1.38-1/sources/1.37.0/gh/DogLi/mio_test/Cargo.toml
[INFO] started frobbing DogLi/mio_test
[INFO] finished frobbing DogLi/mio_test
[INFO] frobbed toml for DogLi/mio_test written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/DogLi/mio_test/Cargo.toml
[INFO] crate DogLi/mio_test 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 DogLi/mio_test against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/DogLi/mio_test:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] ad5c11dc27a06c41851298d1c0a3454278c02a69aff9479d8b239ba6bac3c9d9
[INFO] running `"docker" "start" "-a" "ad5c11dc27a06c41851298d1c0a3454278c02a69aff9479d8b239ba6bac3c9d9"`
[INFO] [stderr]    Compiling libc v0.2.30
[INFO] [stderr]    Compiling byteorder v0.3.13
[INFO] [stderr]    Compiling thread-id v2.0.0
[INFO] [stderr]    Compiling memchr v0.1.11
[INFO] [stderr]    Compiling iovec v0.1.0
[INFO] [stderr]    Compiling net2 v0.2.31
[INFO] [stderr]    Compiling thread_local v0.2.7
[INFO] [stderr]    Compiling aho-corasick v0.5.3
[INFO] [stderr]    Compiling mio v0.6.10
[INFO] [stderr]    Compiling regex v0.1.80
[INFO] [stderr]    Compiling env_logger v0.3.5
[INFO] [stderr]    Compiling mio_test v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/client.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #[macro_use] extern crate log;
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]   --> src/client.rs:17:12
[INFO] [stderr]    |
[INFO] [stderr] 17 |         Ok(n) => {
[INFO] [stderr]    |            ^ help: consider prefixing with an underscore: `_n`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.06s
[INFO] running `"docker" "inspect" "ad5c11dc27a06c41851298d1c0a3454278c02a69aff9479d8b239ba6bac3c9d9"`
[INFO] running `"docker" "rm" "-f" "ad5c11dc27a06c41851298d1c0a3454278c02a69aff9479d8b239ba6bac3c9d9"`
[INFO] [stdout] ad5c11dc27a06c41851298d1c0a3454278c02a69aff9479d8b239ba6bac3c9d9
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/DogLi/mio_test:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] fd0d0696c9f7caf6d082e967a61292b557811af6b6691f350f7797c932ba04f5
[INFO] running `"docker" "start" "-a" "fd0d0696c9f7caf6d082e967a61292b557811af6b6691f350f7797c932ba04f5"`
[INFO] [stderr]    Compiling mio_test v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/client.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #[macro_use] extern crate log;
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]   --> src/client.rs:17:12
[INFO] [stderr]    |
[INFO] [stderr] 17 |         Ok(n) => {
[INFO] [stderr]    |            ^ help: consider prefixing with an underscore: `_n`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.53s
[INFO] running `"docker" "inspect" "fd0d0696c9f7caf6d082e967a61292b557811af6b6691f350f7797c932ba04f5"`
[INFO] running `"docker" "rm" "-f" "fd0d0696c9f7caf6d082e967a61292b557811af6b6691f350f7797c932ba04f5"`
[INFO] [stdout] fd0d0696c9f7caf6d082e967a61292b557811af6b6691f350f7797c932ba04f5
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/DogLi/mio_test:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] c57cee55ab1811417ef1b3604bfd9580ba44875817997a2c29e88721fefdb605
[INFO] running `"docker" "start" "-a" "c57cee55ab1811417ef1b3604bfd9580ba44875817997a2c29e88721fefdb605"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/client-d60381a7bf48931d
[INFO] [stderr]      Running /opt/crater/target/debug/deps/server-6d4ac584e9c7c4bb
[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] [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" "c57cee55ab1811417ef1b3604bfd9580ba44875817997a2c29e88721fefdb605"`
[INFO] running `"docker" "rm" "-f" "c57cee55ab1811417ef1b3604bfd9580ba44875817997a2c29e88721fefdb605"`
[INFO] [stdout] c57cee55ab1811417ef1b3604bfd9580ba44875817997a2c29e88721fefdb605