[INFO] updating cached repository serayuzgur/chainake
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/serayuzgur/chainake
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/serayuzgur/chainake" "work/ex/beta-1.37-6/sources/1.36.0/gh/serayuzgur/chainake"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/serayuzgur/chainake'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/serayuzgur/chainake" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/serayuzgur/chainake"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/serayuzgur/chainake'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c5693bc2e3c41494c0b1c603737e0bf6a9e65787
[INFO] sha for GitHub repo serayuzgur/chainake: c5693bc2e3c41494c0b1c603737e0bf6a9e65787
[INFO] validating manifest of serayuzgur/chainake on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of serayuzgur/chainake on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing serayuzgur/chainake
[INFO] finished frobbing serayuzgur/chainake
[INFO] frobbed toml for serayuzgur/chainake written to work/ex/beta-1.37-6/sources/1.36.0/gh/serayuzgur/chainake/Cargo.toml
[INFO] started frobbing serayuzgur/chainake
[INFO] finished frobbing serayuzgur/chainake
[INFO] frobbed toml for serayuzgur/chainake written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/serayuzgur/chainake/Cargo.toml
[INFO] crate serayuzgur/chainake already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing serayuzgur/chainake against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/serayuzgur/chainake:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 5a8ce1685c2f5298f42cf1a1e085a5b97670a2a5d2561299255dd2bba3a0a524
[INFO] running `"docker" "start" "-a" "5a8ce1685c2f5298f42cf1a1e085a5b97670a2a5d2561299255dd2bba3a0a524"`
[INFO] [stderr]    Compiling termion v1.5.1
[INFO] [stderr]    Compiling chainake v0.0.1-alpha.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `difficulty`
[INFO] [stderr]   --> src/main.rs:29:25
[INFO] [stderr]    |
[INFO] [stderr] 29 |     fn play( &mut self, difficulty: usize) {
[INFO] [stderr]    |                         ^^^^^^^^^^ help: consider prefixing with an underscore: `_difficulty`
[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:42:9
[INFO] [stderr]    |
[INFO] [stderr] 42 |         stdout.flush();
[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 2.50s
[INFO] running `"docker" "inspect" "5a8ce1685c2f5298f42cf1a1e085a5b97670a2a5d2561299255dd2bba3a0a524"`
[INFO] running `"docker" "rm" "-f" "5a8ce1685c2f5298f42cf1a1e085a5b97670a2a5d2561299255dd2bba3a0a524"`
[INFO] [stdout] 5a8ce1685c2f5298f42cf1a1e085a5b97670a2a5d2561299255dd2bba3a0a524
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/serayuzgur/chainake:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] b5ed4d4deee241258bc2d99f572ed01124afaa82cf0cefe39f129ac06023944d
[INFO] running `"docker" "start" "-a" "b5ed4d4deee241258bc2d99f572ed01124afaa82cf0cefe39f129ac06023944d"`
[INFO] [stderr]    Compiling chainake v0.0.1-alpha.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `difficulty`
[INFO] [stderr]   --> src/main.rs:29:25
[INFO] [stderr]    |
[INFO] [stderr] 29 |     fn play( &mut self, difficulty: usize) {
[INFO] [stderr]    |                         ^^^^^^^^^^ help: consider prefixing with an underscore: `_difficulty`
[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:42:9
[INFO] [stderr]    |
[INFO] [stderr] 42 |         stdout.flush();
[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 0.86s
[INFO] running `"docker" "inspect" "b5ed4d4deee241258bc2d99f572ed01124afaa82cf0cefe39f129ac06023944d"`
[INFO] running `"docker" "rm" "-f" "b5ed4d4deee241258bc2d99f572ed01124afaa82cf0cefe39f129ac06023944d"`
[INFO] [stdout] b5ed4d4deee241258bc2d99f572ed01124afaa82cf0cefe39f129ac06023944d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/serayuzgur/chainake:/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 3c974a62a3622b79f501e346774f6a0efb1fc371f5a74531f9bbba893a56f527
[INFO] running `"docker" "start" "-a" "3c974a62a3622b79f501e346774f6a0efb1fc371f5a74531f9bbba893a56f527"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/chainake-ce5647c32b32dde5
[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" "3c974a62a3622b79f501e346774f6a0efb1fc371f5a74531f9bbba893a56f527"`
[INFO] running `"docker" "rm" "-f" "3c974a62a3622b79f501e346774f6a0efb1fc371f5a74531f9bbba893a56f527"`
[INFO] [stdout] 3c974a62a3622b79f501e346774f6a0efb1fc371f5a74531f9bbba893a56f527