[INFO] updating cached repository danbruce/chess-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/danbruce/chess-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/danbruce/chess-rs" "work/ex/beta-1.38-1/sources/1.37.0/gh/danbruce/chess-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/danbruce/chess-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/danbruce/chess-rs" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/danbruce/chess-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/danbruce/chess-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ae7c93ff236474938284474c92d183e751f83a6f
[INFO] sha for GitHub repo danbruce/chess-rs: ae7c93ff236474938284474c92d183e751f83a6f
[INFO] validating manifest of danbruce/chess-rs 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 danbruce/chess-rs 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 danbruce/chess-rs
[INFO] finished frobbing danbruce/chess-rs
[INFO] frobbed toml for danbruce/chess-rs written to work/ex/beta-1.38-1/sources/1.37.0/gh/danbruce/chess-rs/Cargo.toml
[INFO] started frobbing danbruce/chess-rs
[INFO] finished frobbing danbruce/chess-rs
[INFO] frobbed toml for danbruce/chess-rs written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/danbruce/chess-rs/Cargo.toml
[INFO] crate danbruce/chess-rs 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 danbruce/chess-rs 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-6/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/danbruce/chess-rs:/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] 2f574e564979ed3b3e686b5d900f0ef7593597d7c6f1cc31e4443c4263d4910b
[INFO] running `"docker" "start" "-a" "2f574e564979ed3b3e686b5d900f0ef7593597d7c6f1cc31e4443c4263d4910b"`
[INFO] [stderr]    Compiling chess v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: field is never used: `file`
[INFO] [stderr]  --> src/board.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     file: u8,
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `rank`
[INFO] [stderr]  --> src/board.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     rank: u8,
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.75s
[INFO] running `"docker" "inspect" "2f574e564979ed3b3e686b5d900f0ef7593597d7c6f1cc31e4443c4263d4910b"`
[INFO] running `"docker" "rm" "-f" "2f574e564979ed3b3e686b5d900f0ef7593597d7c6f1cc31e4443c4263d4910b"`
[INFO] [stdout] 2f574e564979ed3b3e686b5d900f0ef7593597d7c6f1cc31e4443c4263d4910b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/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/danbruce/chess-rs:/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] 83bed22700313d6e5a2e2cbd64eb6f1166c3c343087f49c5409c135fd8e895d7
[INFO] running `"docker" "start" "-a" "83bed22700313d6e5a2e2cbd64eb6f1166c3c343087f49c5409c135fd8e895d7"`
[INFO] [stderr]    Compiling chess v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: field is never used: `file`
[INFO] [stderr]  --> src/board.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     file: u8,
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `rank`
[INFO] [stderr]  --> src/board.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     rank: u8,
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.76s
[INFO] running `"docker" "inspect" "83bed22700313d6e5a2e2cbd64eb6f1166c3c343087f49c5409c135fd8e895d7"`
[INFO] running `"docker" "rm" "-f" "83bed22700313d6e5a2e2cbd64eb6f1166c3c343087f49c5409c135fd8e895d7"`
[INFO] [stdout] 83bed22700313d6e5a2e2cbd64eb6f1166c3c343087f49c5409c135fd8e895d7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/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/danbruce/chess-rs:/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] 50da31f2875cc796ee258f643354bf50c610485bdacfb146f1aaa90fcd4ddb34
[INFO] running `"docker" "start" "-a" "50da31f2875cc796ee258f643354bf50c610485bdacfb146f1aaa90fcd4ddb34"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/chess-88eea5d242f64b40
[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" "50da31f2875cc796ee258f643354bf50c610485bdacfb146f1aaa90fcd4ddb34"`
[INFO] running `"docker" "rm" "-f" "50da31f2875cc796ee258f643354bf50c610485bdacfb146f1aaa90fcd4ddb34"`
[INFO] [stdout] 50da31f2875cc796ee258f643354bf50c610485bdacfb146f1aaa90fcd4ddb34