Dec 18 01:35:30.019 INFO checking ddefrenne/battleship against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 01:35:30.019 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-2/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/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=forbid" "-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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 01:35:30.205 INFO [stdout] be6fee9050fe51d1677b0075d57ab4a9edad9bb6bc4f3aedd7b24ab3dc069011
Dec 18 01:35:30.206 INFO running `"docker" "start" "-a" "be6fee9050fe51d1677b0075d57ab4a9edad9bb6bc4f3aedd7b24ab3dc069011"`
Dec 18 01:35:30.777 INFO [stderr]     Checking battleship v0.1.0 (/opt/crater/workdir)
Dec 18 01:35:30.940 INFO [stderr] warning: unnecessary parentheses around `for` head expression
Dec 18 01:35:30.940 INFO [stderr]   --> src/main.rs:19:19
Dec 18 01:35:30.940 INFO [stderr]    |
Dec 18 01:35:30.940 INFO [stderr] 19 |     for column in (1..amount_of_columns + 1) {
Dec 18 01:35:30.940 INFO [stderr]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Dec 18 01:35:30.940 INFO [stderr]    |
Dec 18 01:35:30.940 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Dec 18 01:35:30.940 INFO [stderr] 
Dec 18 01:35:30.976 INFO [stderr] warning: unused variable: `grid`
Dec 18 01:35:30.976 INFO [stderr]  --> src/main.rs:5:9
Dec 18 01:35:30.976 INFO [stderr]   |
Dec 18 01:35:30.976 INFO [stderr] 5 |     let grid = build_grid(&rows, amount_of_columns);
Dec 18 01:35:30.976 INFO [stderr]   |         ^^^^ help: consider using `_grid` instead
Dec 18 01:35:30.976 INFO [stderr]   |
Dec 18 01:35:30.976 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 18 01:35:30.976 INFO [stderr] 
Dec 18 01:35:30.976 INFO [stderr] warning: unused variable: `rows`
Dec 18 01:35:30.976 INFO [stderr]  --> src/main.rs:8:15
Dec 18 01:35:30.976 INFO [stderr]   |
Dec 18 01:35:30.976 INFO [stderr] 8 | fn build_grid(rows: &[char; 10], amount_of_columns: i32) {
Dec 18 01:35:30.976 INFO [stderr]   |               ^^^^ help: consider using `_rows` instead
Dec 18 01:35:30.976 INFO [stderr] 
Dec 18 01:35:30.992 INFO [stderr] warning: unnecessary parentheses around `for` head expression
Dec 18 01:35:30.992 INFO [stderr]   --> src/main.rs:19:19
Dec 18 01:35:30.992 INFO [stderr]    |
Dec 18 01:35:30.992 INFO [stderr] 19 |     for column in (1..amount_of_columns + 1) {
Dec 18 01:35:30.992 INFO [stderr]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Dec 18 01:35:30.992 INFO [stderr]    |
Dec 18 01:35:30.992 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Dec 18 01:35:30.992 INFO [stderr] 
Dec 18 01:35:31.020 INFO [stderr] warning: unused variable: `grid`
Dec 18 01:35:31.020 INFO [stderr]  --> src/main.rs:5:9
Dec 18 01:35:31.020 INFO [stderr]   |
Dec 18 01:35:31.020 INFO [stderr] 5 |     let grid = build_grid(&rows, amount_of_columns);
Dec 18 01:35:31.020 INFO [stderr]   |         ^^^^ help: consider using `_grid` instead
Dec 18 01:35:31.021 INFO [stderr]   |
Dec 18 01:35:31.021 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 18 01:35:31.021 INFO [stderr] 
Dec 18 01:35:31.021 INFO [stderr] warning: unused variable: `rows`
Dec 18 01:35:31.021 INFO [stderr]  --> src/main.rs:8:15
Dec 18 01:35:31.021 INFO [stderr]   |
Dec 18 01:35:31.021 INFO [stderr] 8 | fn build_grid(rows: &[char; 10], amount_of_columns: i32) {
Dec 18 01:35:31.021 INFO [stderr]   |               ^^^^ help: consider using `_rows` instead
Dec 18 01:35:31.021 INFO [stderr] 
Dec 18 01:35:31.054 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.29s
Dec 18 01:35:31.306 INFO running `"docker" "inspect" "be6fee9050fe51d1677b0075d57ab4a9edad9bb6bc4f3aedd7b24ab3dc069011"`
Dec 18 01:35:31.406 INFO running `"docker" "rm" "-f" "be6fee9050fe51d1677b0075d57ab4a9edad9bb6bc4f3aedd7b24ab3dc069011"`
Dec 18 01:35:31.527 INFO [stdout] be6fee9050fe51d1677b0075d57ab4a9edad9bb6bc4f3aedd7b24ab3dc069011