Dec 04 20:43:28.921 INFO checking conundrumer/crossword against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 04 20:43:28.921 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-0/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56481/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +1df97983eb2057dc6a8f7eb364e263b51ae23230-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 04 20:43:29.427 INFO [stdout] 84ebac70d134425159d978ffd484739fe6561b90855902de57519d1434dcf838
Dec 04 20:43:29.429 INFO running `"docker" "start" "-a" "84ebac70d134425159d978ffd484739fe6561b90855902de57519d1434dcf838"`
Dec 04 20:43:31.295 INFO [stderr] usermod: no changes
Dec 04 20:43:31.363 INFO [stderr]     Checking crossword v0.1.0 (/source)
Dec 04 20:43:31.807 INFO [stderr] warning: unnecessary parentheses around function argument
Dec 04 20:43:31.808 INFO [stderr]   --> src/grid.rs:25:21
Dec 04 20:43:31.808 INFO [stderr]    |
Dec 04 20:43:31.808 INFO [stderr] 25 |         vec![Empty; ((bb.width() as usize) * (bb.height() as usize))]
Dec 04 20:43:31.808 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Dec 04 20:43:31.809 INFO [stderr]    |
Dec 04 20:43:31.809 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Dec 04 20:43:31.809 INFO [stderr] 
Dec 04 20:43:32.031 INFO [stderr] warning: unnecessary parentheses around function argument
Dec 04 20:43:32.031 INFO [stderr]   --> src/grid.rs:25:21
Dec 04 20:43:32.031 INFO [stderr]    |
Dec 04 20:43:32.032 INFO [stderr] 25 |         vec![Empty; ((bb.width() as usize) * (bb.height() as usize))]
Dec 04 20:43:32.032 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Dec 04 20:43:32.032 INFO [stderr]    |
Dec 04 20:43:32.033 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Dec 04 20:43:32.033 INFO [stderr] 
Dec 04 20:43:32.531 INFO [stderr] warning: variable does not need to be mutable
Dec 04 20:43:32.531 INFO [stderr]    --> src/filter.rs:115:17
Dec 04 20:43:32.531 INFO [stderr]     |
Dec 04 20:43:32.532 INFO [stderr] 115 |             let mut seen = &mut self.seen.borrow_mut();
Dec 04 20:43:32.532 INFO [stderr]     |                 ----^^^^
Dec 04 20:43:32.532 INFO [stderr]     |                 |
Dec 04 20:43:32.532 INFO [stderr]     |                 help: remove this `mut`
Dec 04 20:43:32.533 INFO [stderr]     |
Dec 04 20:43:32.533 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 04 20:43:32.533 INFO [stderr] 
Dec 04 20:43:32.611 INFO [stderr] warning: type alias is never used: `GridCellPos`
Dec 04 20:43:32.611 INFO [stderr]  --> src/grid_cell.rs:4:1
Dec 04 20:43:32.611 INFO [stderr]   |
Dec 04 20:43:32.611 INFO [stderr] 4 | type GridCellPos = (GridCell, (i8, i8));
Dec 04 20:43:32.611 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 20:43:32.611 INFO [stderr]   |
Dec 04 20:43:32.611 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 04 20:43:32.611 INFO [stderr] 
Dec 04 20:43:32.611 INFO [stderr] warning: method is never used: `is_valid`
Dec 04 20:43:32.611 INFO [stderr]   --> src/crossword.rs:38:5
Dec 04 20:43:32.611 INFO [stderr]    |
Dec 04 20:43:32.611 INFO [stderr] 38 |     pub fn is_valid(&self) -> bool {
Dec 04 20:43:32.611 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 20:43:32.611 INFO [stderr] 
Dec 04 20:43:32.611 INFO [stderr] warning: method is never used: `iter`
Dec 04 20:43:32.611 INFO [stderr]   --> src/generate.rs:41:5
Dec 04 20:43:32.611 INFO [stderr]    |
Dec 04 20:43:32.611 INFO [stderr] 41 |     pub fn iter<'b>(&'b self) -> Box<Iterator<Item=Crossword> + 'b> {
Dec 04 20:43:32.611 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 20:43:32.611 INFO [stderr] 
Dec 04 20:43:32.611 INFO [stderr] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
Dec 04 20:43:32.611 INFO [stderr]  --> src/main.rs:1:12
Dec 04 20:43:32.612 INFO [stderr]   |
Dec 04 20:43:32.612 INFO [stderr] 1 | #![feature(conservative_impl_trait)]
Dec 04 20:43:32.612 INFO [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 20:43:32.612 INFO [stderr]   |
Dec 04 20:43:32.612 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 04 20:43:32.612 INFO [stderr] 
Dec 04 20:43:32.624 INFO [stderr] warning: variable does not need to be mutable
Dec 04 20:43:32.624 INFO [stderr]    --> src/filter.rs:115:17
Dec 04 20:43:32.624 INFO [stderr]     |
Dec 04 20:43:32.624 INFO [stderr] 115 |             let mut seen = &mut self.seen.borrow_mut();
Dec 04 20:43:32.624 INFO [stderr]     |                 ----^^^^
Dec 04 20:43:32.624 INFO [stderr]     |                 |
Dec 04 20:43:32.624 INFO [stderr]     |                 help: remove this `mut`
Dec 04 20:43:32.625 INFO [stderr]     |
Dec 04 20:43:32.625 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 04 20:43:32.625 INFO [stderr] 
Dec 04 20:43:32.738 INFO [stderr] warning: type alias is never used: `GridCellPos`
Dec 04 20:43:32.738 INFO [stderr]  --> src/grid_cell.rs:4:1
Dec 04 20:43:32.738 INFO [stderr]   |
Dec 04 20:43:32.738 INFO [stderr] 4 | type GridCellPos = (GridCell, (i8, i8));
Dec 04 20:43:32.738 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 20:43:32.739 INFO [stderr]   |
Dec 04 20:43:32.739 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 04 20:43:32.739 INFO [stderr] 
Dec 04 20:43:32.739 INFO [stderr] warning: type alias is never used: `WordPosition`
Dec 04 20:43:32.739 INFO [stderr]    --> src/generate.rs:185:5
Dec 04 20:43:32.739 INFO [stderr]     |
Dec 04 20:43:32.739 INFO [stderr] 185 |     type WordPosition = (&'static str, Position);
Dec 04 20:43:32.740 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 20:43:32.740 INFO [stderr] 
Dec 04 20:43:32.740 INFO [stderr] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
Dec 04 20:43:32.740 INFO [stderr]  --> src/main.rs:1:12
Dec 04 20:43:32.740 INFO [stderr]   |
Dec 04 20:43:32.740 INFO [stderr] 1 | #![feature(conservative_impl_trait)]
Dec 04 20:43:32.740 INFO [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 20:43:32.741 INFO [stderr]   |
Dec 04 20:43:32.741 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 04 20:43:32.741 INFO [stderr] 
Dec 04 20:43:32.791 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.47s
Dec 04 20:43:32.793 INFO [stderr] su: No module specific data is present
Dec 04 20:43:34.236 INFO running `"docker" "inspect" "84ebac70d134425159d978ffd484739fe6561b90855902de57519d1434dcf838"`
Dec 04 20:43:34.669 INFO running `"docker" "rm" "-f" "84ebac70d134425159d978ffd484739fe6561b90855902de57519d1434dcf838"`
Dec 04 20:43:34.951 INFO [stdout] 84ebac70d134425159d978ffd484739fe6561b90855902de57519d1434dcf838