[INFO] updating cached repository kpberry/chess
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/kpberry/chess
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/kpberry/chess" "work/ex/beta-1.37-6/sources/1.36.0/gh/kpberry/chess"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/kpberry/chess'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/kpberry/chess" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/kpberry/chess"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/kpberry/chess'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 246b6ec3a5c2157abdef9408d2b6dc953deb92f8
[INFO] sha for GitHub repo kpberry/chess: 246b6ec3a5c2157abdef9408d2b6dc953deb92f8
[INFO] validating manifest of kpberry/chess 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 kpberry/chess 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 kpberry/chess
[INFO] finished frobbing kpberry/chess
[INFO] frobbed toml for kpberry/chess written to work/ex/beta-1.37-6/sources/1.36.0/gh/kpberry/chess/Cargo.toml
[INFO] started frobbing kpberry/chess
[INFO] finished frobbing kpberry/chess
[INFO] frobbed toml for kpberry/chess written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/kpberry/chess/Cargo.toml
[INFO] crate kpberry/chess 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 kpberry/chess 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-1/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/kpberry/chess:/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] 570fe2aff1971c0d445c59f6a96242c2b3cf15d650f308f27a628395fdc67abb
[INFO] running `"docker" "start" "-a" "570fe2aff1971c0d445c59f6a96242c2b3cf15d650f308f27a628395fdc67abb"`
[INFO] [stderr]    Compiling chess v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: method is never used: `undo_move`
[INFO] [stderr]    --> src/main.rs:471:5
[INFO] [stderr]     |
[INFO] [stderr] 471 |     fn undo_move(&mut self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.63s
[INFO] running `"docker" "inspect" "570fe2aff1971c0d445c59f6a96242c2b3cf15d650f308f27a628395fdc67abb"`
[INFO] running `"docker" "rm" "-f" "570fe2aff1971c0d445c59f6a96242c2b3cf15d650f308f27a628395fdc67abb"`
[INFO] [stdout] 570fe2aff1971c0d445c59f6a96242c2b3cf15d650f308f27a628395fdc67abb
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/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/kpberry/chess:/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] babc13b8debfc78efaedf2d181b4b11fc707eeace0fafedebda603a91634c997
[INFO] running `"docker" "start" "-a" "babc13b8debfc78efaedf2d181b4b11fc707eeace0fafedebda603a91634c997"`
[INFO] [stderr]    Compiling chess v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: method is never used: `undo_move`
[INFO] [stderr]    --> src/main.rs:471:5
[INFO] [stderr]     |
[INFO] [stderr] 471 |     fn undo_move(&mut self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.94s
[INFO] running `"docker" "inspect" "babc13b8debfc78efaedf2d181b4b11fc707eeace0fafedebda603a91634c997"`
[INFO] running `"docker" "rm" "-f" "babc13b8debfc78efaedf2d181b4b11fc707eeace0fafedebda603a91634c997"`
[INFO] [stdout] babc13b8debfc78efaedf2d181b4b11fc707eeace0fafedebda603a91634c997
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/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/kpberry/chess:/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] c43421e8863181fdfc01a0adc1f22bd29719970571dffc04b1c4a9a9212dac8a
[INFO] running `"docker" "start" "-a" "c43421e8863181fdfc01a0adc1f22bd29719970571dffc04b1c4a9a9212dac8a"`
[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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/chess-43f880a2083883e1
[INFO] running `"docker" "inspect" "c43421e8863181fdfc01a0adc1f22bd29719970571dffc04b1c4a9a9212dac8a"`
[INFO] running `"docker" "rm" "-f" "c43421e8863181fdfc01a0adc1f22bd29719970571dffc04b1c4a9a9212dac8a"`
[INFO] [stdout] c43421e8863181fdfc01a0adc1f22bd29719970571dffc04b1c4a9a9212dac8a