[INFO] updating cached repository ashfordneil/2048-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ashfordneil/2048-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ashfordneil/2048-rust" "work/ex/beta-1.37-6/sources/1.36.0/gh/ashfordneil/2048-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/ashfordneil/2048-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ashfordneil/2048-rust" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/ashfordneil/2048-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/ashfordneil/2048-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4346ff7de1ea7d8622510199de6e8d4992d3350f
[INFO] sha for GitHub repo ashfordneil/2048-rust: 4346ff7de1ea7d8622510199de6e8d4992d3350f
[INFO] validating manifest of ashfordneil/2048-rust 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 ashfordneil/2048-rust 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 ashfordneil/2048-rust
[INFO] finished frobbing ashfordneil/2048-rust
[INFO] frobbed toml for ashfordneil/2048-rust written to work/ex/beta-1.37-6/sources/1.36.0/gh/ashfordneil/2048-rust/Cargo.toml
[INFO] started frobbing ashfordneil/2048-rust
[INFO] finished frobbing ashfordneil/2048-rust
[INFO] frobbed toml for ashfordneil/2048-rust written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/ashfordneil/2048-rust/Cargo.toml
[INFO] crate ashfordneil/2048-rust 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 ashfordneil/2048-rust against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/ashfordneil/2048-rust:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] ad4fdeb359a77f9ab1f7c16b3d388d7d63dc6cf8a280ea136f0111abe3fbf505
[INFO] running `"docker" "start" "-a" "ad4fdeb359a77f9ab1f7c16b3d388d7d63dc6cf8a280ea136f0111abe3fbf505"`
[INFO] [stderr]    Compiling libc v0.2.18
[INFO] [stderr]    Compiling either v1.0.2
[INFO] [stderr]    Compiling itertools v0.5.8
[INFO] [stderr]    Compiling termion v1.1.4
[INFO] [stderr]    Compiling rand v0.3.15
[INFO] [stderr]    Compiling 2048 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> src/board.rs:70:32
[INFO] [stderr]    |
[INFO] [stderr] 70 |                       Digit(Some((((index / BOARD_WIDTH as usize / BOARD_WIDTH as usize %
[INFO] [stderr]    |  ________________________________^
[INFO] [stderr] 71 | |                                   2) as u8))));
[INFO] [stderr]    | |____________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 70 |                     Digit(Some(((index / BOARD_WIDTH as usize / BOARD_WIDTH as usize %
[INFO] [stderr] 71 |                                   2) as u8)));
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.21s
[INFO] running `"docker" "inspect" "ad4fdeb359a77f9ab1f7c16b3d388d7d63dc6cf8a280ea136f0111abe3fbf505"`
[INFO] running `"docker" "rm" "-f" "ad4fdeb359a77f9ab1f7c16b3d388d7d63dc6cf8a280ea136f0111abe3fbf505"`
[INFO] [stdout] ad4fdeb359a77f9ab1f7c16b3d388d7d63dc6cf8a280ea136f0111abe3fbf505
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/ashfordneil/2048-rust:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 9b6745c1723806860af3d753d21d482f586c999286b8c0cad4aaa3a6bb583311
[INFO] running `"docker" "start" "-a" "9b6745c1723806860af3d753d21d482f586c999286b8c0cad4aaa3a6bb583311"`
[INFO] [stderr]    Compiling 2048 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> src/board.rs:70:32
[INFO] [stderr]    |
[INFO] [stderr] 70 |                       Digit(Some((((index / BOARD_WIDTH as usize / BOARD_WIDTH as usize %
[INFO] [stderr]    |  ________________________________^
[INFO] [stderr] 71 | |                                   2) as u8))));
[INFO] [stderr]    | |____________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 70 |                     Digit(Some(((index / BOARD_WIDTH as usize / BOARD_WIDTH as usize %
[INFO] [stderr] 71 |                                   2) as u8)));
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.85s
[INFO] running `"docker" "inspect" "9b6745c1723806860af3d753d21d482f586c999286b8c0cad4aaa3a6bb583311"`
[INFO] running `"docker" "rm" "-f" "9b6745c1723806860af3d753d21d482f586c999286b8c0cad4aaa3a6bb583311"`
[INFO] [stdout] 9b6745c1723806860af3d753d21d482f586c999286b8c0cad4aaa3a6bb583311
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/ashfordneil/2048-rust:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 9aae30e03d255318fad4ba8349216cc93a76e9aa6e7fa4decbee414a52754deb
[INFO] running `"docker" "start" "-a" "9aae30e03d255318fad4ba8349216cc93a76e9aa6e7fa4decbee414a52754deb"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/2048-9fece35dd0c3cabd
[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" "9aae30e03d255318fad4ba8349216cc93a76e9aa6e7fa4decbee414a52754deb"`
[INFO] running `"docker" "rm" "-f" "9aae30e03d255318fad4ba8349216cc93a76e9aa6e7fa4decbee414a52754deb"`
[INFO] [stdout] 9aae30e03d255318fad4ba8349216cc93a76e9aa6e7fa4decbee414a52754deb