[INFO] updating cached repository ddefrenne/battleship
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ddefrenne/battleship
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ddefrenne/battleship" "work/ex/beta-1.38-1/sources/1.37.0/gh/ddefrenne/battleship"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ddefrenne/battleship'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ddefrenne/battleship" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ddefrenne/battleship"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ddefrenne/battleship'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a80a793b47a6039c462dba8e442ae1ea489828d8
[INFO] sha for GitHub repo ddefrenne/battleship: a80a793b47a6039c462dba8e442ae1ea489828d8
[INFO] validating manifest of ddefrenne/battleship 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 ddefrenne/battleship 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 ddefrenne/battleship
[INFO] finished frobbing ddefrenne/battleship
[INFO] frobbed toml for ddefrenne/battleship written to work/ex/beta-1.38-1/sources/1.37.0/gh/ddefrenne/battleship/Cargo.toml
[INFO] started frobbing ddefrenne/battleship
[INFO] finished frobbing ddefrenne/battleship
[INFO] frobbed toml for ddefrenne/battleship written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ddefrenne/battleship/Cargo.toml
[INFO] crate ddefrenne/battleship 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing ddefrenne/battleship 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-5/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/ddefrenne/battleship:/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] ec2d7215787d684ef7e5db03ac2d865b2d1e660b41ae3cb39af7176011ffd7ed
[INFO] running `"docker" "start" "-a" "ec2d7215787d684ef7e5db03ac2d865b2d1e660b41ae3cb39af7176011ffd7ed"`
[INFO] [stderr]    Compiling battleship v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> src/main.rs:19:19
[INFO] [stderr]    |
[INFO] [stderr] 19 |     for column in (1..amount_of_columns + 1) {
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `grid`
[INFO] [stderr]  --> src/main.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let grid = build_grid(&rows, amount_of_columns);
[INFO] [stderr]   |         ^^^^ help: consider prefixing with an underscore: `_grid`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rows`
[INFO] [stderr]  --> src/main.rs:8:15
[INFO] [stderr]   |
[INFO] [stderr] 8 | fn build_grid(rows: &[char; 10], amount_of_columns: i32) {
[INFO] [stderr]   |               ^^^^ help: consider prefixing with an underscore: `_rows`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `"docker" "inspect" "ec2d7215787d684ef7e5db03ac2d865b2d1e660b41ae3cb39af7176011ffd7ed"`
[INFO] running `"docker" "rm" "-f" "ec2d7215787d684ef7e5db03ac2d865b2d1e660b41ae3cb39af7176011ffd7ed"`
[INFO] [stdout] ec2d7215787d684ef7e5db03ac2d865b2d1e660b41ae3cb39af7176011ffd7ed
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/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/ddefrenne/battleship:/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] d4aed6cb4a9d55e9753bb6e919a6755c813d618b46d54c1971a6f91cb9ea959a
[INFO] running `"docker" "start" "-a" "d4aed6cb4a9d55e9753bb6e919a6755c813d618b46d54c1971a6f91cb9ea959a"`
[INFO] [stderr]    Compiling battleship v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> src/main.rs:19:19
[INFO] [stderr]    |
[INFO] [stderr] 19 |     for column in (1..amount_of_columns + 1) {
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `grid`
[INFO] [stderr]  --> src/main.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let grid = build_grid(&rows, amount_of_columns);
[INFO] [stderr]   |         ^^^^ help: consider prefixing with an underscore: `_grid`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rows`
[INFO] [stderr]  --> src/main.rs:8:15
[INFO] [stderr]   |
[INFO] [stderr] 8 | fn build_grid(rows: &[char; 10], amount_of_columns: i32) {
[INFO] [stderr]   |               ^^^^ help: consider prefixing with an underscore: `_rows`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `"docker" "inspect" "d4aed6cb4a9d55e9753bb6e919a6755c813d618b46d54c1971a6f91cb9ea959a"`
[INFO] running `"docker" "rm" "-f" "d4aed6cb4a9d55e9753bb6e919a6755c813d618b46d54c1971a6f91cb9ea959a"`
[INFO] [stdout] d4aed6cb4a9d55e9753bb6e919a6755c813d618b46d54c1971a6f91cb9ea959a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/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/ddefrenne/battleship:/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] d2359fd04f7d868d175d35c29fa24206d0b1d79c116079619231f99502ea8f5d
[INFO] running `"docker" "start" "-a" "d2359fd04f7d868d175d35c29fa24206d0b1d79c116079619231f99502ea8f5d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/battleship-4f0eb3283efec89b
[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" "d2359fd04f7d868d175d35c29fa24206d0b1d79c116079619231f99502ea8f5d"`
[INFO] running `"docker" "rm" "-f" "d2359fd04f7d868d175d35c29fa24206d0b1d79c116079619231f99502ea8f5d"`
[INFO] [stdout] d2359fd04f7d868d175d35c29fa24206d0b1d79c116079619231f99502ea8f5d