Dec 19 18:12:20.828 INFO checking ddefrenne/battleship against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 18:12:20.828 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-7/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 18:12:21.252 INFO [stdout] 01be13da4b21b855dec5a22605320c3a352cdb30ace6b56d0eacec7a66462ce7
Dec 19 18:12:21.254 INFO running `"docker" "start" "-a" "01be13da4b21b855dec5a22605320c3a352cdb30ace6b56d0eacec7a66462ce7"`
Dec 19 18:12:22.524 INFO [stderr]     Checking battleship v0.1.0 (/opt/crater/workdir)
Dec 19 18:12:22.752 INFO [stderr] warning: unnecessary parentheses around `for` head expression
Dec 19 18:12:22.752 INFO [stderr]   --> src/main.rs:19:19
Dec 19 18:12:22.752 INFO [stderr]    |
Dec 19 18:12:22.752 INFO [stderr] 19 |     for column in (1..amount_of_columns + 1) {
Dec 19 18:12:22.752 INFO [stderr]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Dec 19 18:12:22.752 INFO [stderr]    |
Dec 19 18:12:22.752 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Dec 19 18:12:22.752 INFO [stderr] 
Dec 19 18:12:22.803 INFO [stderr] warning: unused variable: `grid`
Dec 19 18:12:22.803 INFO [stderr]  --> src/main.rs:5:9
Dec 19 18:12:22.803 INFO [stderr]   |
Dec 19 18:12:22.803 INFO [stderr] 5 |     let grid = build_grid(&rows, amount_of_columns);
Dec 19 18:12:22.803 INFO [stderr]   |         ^^^^ help: consider using `_grid` instead
Dec 19 18:12:22.803 INFO [stderr]   |
Dec 19 18:12:22.803 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 19 18:12:22.803 INFO [stderr] 
Dec 19 18:12:22.803 INFO [stderr] warning: unused variable: `rows`
Dec 19 18:12:22.803 INFO [stderr]  --> src/main.rs:8:15
Dec 19 18:12:22.803 INFO [stderr]   |
Dec 19 18:12:22.803 INFO [stderr] 8 | fn build_grid(rows: &[char; 10], amount_of_columns: i32) {
Dec 19 18:12:22.803 INFO [stderr]   |               ^^^^ help: consider using `_rows` instead
Dec 19 18:12:22.803 INFO [stderr] 
Dec 19 18:12:22.860 INFO [stderr] warning: unnecessary parentheses around `for` head expression
Dec 19 18:12:22.860 INFO [stderr]   --> src/main.rs:19:19
Dec 19 18:12:22.860 INFO [stderr]    |
Dec 19 18:12:22.860 INFO [stderr] 19 |     for column in (1..amount_of_columns + 1) {
Dec 19 18:12:22.860 INFO [stderr]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Dec 19 18:12:22.860 INFO [stderr]    |
Dec 19 18:12:22.860 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Dec 19 18:12:22.860 INFO [stderr] 
Dec 19 18:12:22.937 INFO [stderr] warning: unused variable: `grid`
Dec 19 18:12:22.937 INFO [stderr]  --> src/main.rs:5:9
Dec 19 18:12:22.937 INFO [stderr]   |
Dec 19 18:12:22.937 INFO [stderr] 5 |     let grid = build_grid(&rows, amount_of_columns);
Dec 19 18:12:22.937 INFO [stderr]   |         ^^^^ help: consider using `_grid` instead
Dec 19 18:12:22.938 INFO [stderr]   |
Dec 19 18:12:22.938 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 19 18:12:22.938 INFO [stderr] 
Dec 19 18:12:22.938 INFO [stderr] warning: unused variable: `rows`
Dec 19 18:12:22.938 INFO [stderr]  --> src/main.rs:8:15
Dec 19 18:12:22.938 INFO [stderr]   |
Dec 19 18:12:22.938 INFO [stderr] 8 | fn build_grid(rows: &[char; 10], amount_of_columns: i32) {
Dec 19 18:12:22.938 INFO [stderr]   |               ^^^^ help: consider using `_rows` instead
Dec 19 18:12:22.938 INFO [stderr] 
Dec 19 18:12:22.990 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.49s
Dec 19 18:12:23.600 INFO running `"docker" "inspect" "01be13da4b21b855dec5a22605320c3a352cdb30ace6b56d0eacec7a66462ce7"`
Dec 19 18:12:23.841 INFO running `"docker" "rm" "-f" "01be13da4b21b855dec5a22605320c3a352cdb30ace6b56d0eacec7a66462ce7"`
Dec 19 18:12:24.072 INFO [stdout] 01be13da4b21b855dec5a22605320c3a352cdb30ace6b56d0eacec7a66462ce7