Dec 19 18:49:56.900 INFO checking conundrumer/crossword against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 18:49:56.900 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-0/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/conundrumer/crossword:/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 18:49:57.304 INFO [stdout] 604f28b0c4b082a2c28b8ea6165afcd3a4bfdef77d9542d7b35695ee670e84b4
Dec 19 18:49:57.308 INFO running `"docker" "start" "-a" "604f28b0c4b082a2c28b8ea6165afcd3a4bfdef77d9542d7b35695ee670e84b4"`
Dec 19 18:49:58.840 INFO [stderr]     Checking crossword v0.1.0 (/opt/crater/workdir)
Dec 19 18:49:59.104 INFO [stderr] warning: unnecessary parentheses around function argument
Dec 19 18:49:59.104 INFO [stderr]   --> src/grid.rs:25:21
Dec 19 18:49:59.104 INFO [stderr]    |
Dec 19 18:49:59.104 INFO [stderr] 25 |         vec![Empty; ((bb.width() as usize) * (bb.height() as usize))]
Dec 19 18:49:59.104 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Dec 19 18:49:59.104 INFO [stderr]    |
Dec 19 18:49:59.104 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Dec 19 18:49:59.104 INFO [stderr] 
Dec 19 18:49:59.259 INFO [stderr] warning: unnecessary parentheses around function argument
Dec 19 18:49:59.259 INFO [stderr]   --> src/grid.rs:25:21
Dec 19 18:49:59.259 INFO [stderr]    |
Dec 19 18:49:59.259 INFO [stderr] 25 |         vec![Empty; ((bb.width() as usize) * (bb.height() as usize))]
Dec 19 18:49:59.259 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Dec 19 18:49:59.259 INFO [stderr]    |
Dec 19 18:49:59.259 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Dec 19 18:49:59.259 INFO [stderr] 
Dec 19 18:49:59.484 INFO [stderr] warning: variable does not need to be mutable
Dec 19 18:49:59.484 INFO [stderr]    --> src/filter.rs:115:17
Dec 19 18:49:59.484 INFO [stderr]     |
Dec 19 18:49:59.484 INFO [stderr] 115 |             let mut seen = &mut self.seen.borrow_mut();
Dec 19 18:49:59.484 INFO [stderr]     |                 ----^^^^
Dec 19 18:49:59.484 INFO [stderr]     |                 |
Dec 19 18:49:59.484 INFO [stderr]     |                 help: remove this `mut`
Dec 19 18:49:59.484 INFO [stderr]     |
Dec 19 18:49:59.484 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 19 18:49:59.485 INFO [stderr] 
Dec 19 18:49:59.530 INFO [stderr] warning: method is never used: `is_valid`
Dec 19 18:49:59.530 INFO [stderr]   --> src/crossword.rs:38:5
Dec 19 18:49:59.531 INFO [stderr]    |
Dec 19 18:49:59.531 INFO [stderr] 38 |     pub fn is_valid(&self) -> bool {
Dec 19 18:49:59.531 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 18:49:59.532 INFO [stderr]    |
Dec 19 18:49:59.532 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 18:49:59.532 INFO [stderr] 
Dec 19 18:49:59.532 INFO [stderr] warning: method is never used: `iter`
Dec 19 18:49:59.532 INFO [stderr]   --> src/generate.rs:41:5
Dec 19 18:49:59.533 INFO [stderr]    |
Dec 19 18:49:59.533 INFO [stderr] 41 |     pub fn iter<'b>(&'b self) -> Box<Iterator<Item=Crossword> + 'b> {
Dec 19 18:49:59.533 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 18:49:59.533 INFO [stderr] 
Dec 19 18:49:59.534 INFO [stderr] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
Dec 19 18:49:59.534 INFO [stderr]  --> src/main.rs:1:12
Dec 19 18:49:59.534 INFO [stderr]   |
Dec 19 18:49:59.534 INFO [stderr] 1 | #![feature(conservative_impl_trait)]
Dec 19 18:49:59.535 INFO [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 18:49:59.535 INFO [stderr]   |
Dec 19 18:49:59.535 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 19 18:49:59.535 INFO [stderr] 
Dec 19 18:49:59.900 INFO [stderr] warning: variable does not need to be mutable
Dec 19 18:49:59.900 INFO [stderr]    --> src/filter.rs:115:17
Dec 19 18:49:59.900 INFO [stderr]     |
Dec 19 18:49:59.900 INFO [stderr] 115 |             let mut seen = &mut self.seen.borrow_mut();
Dec 19 18:49:59.900 INFO [stderr]     |                 ----^^^^
Dec 19 18:49:59.900 INFO [stderr]     |                 |
Dec 19 18:49:59.900 INFO [stderr]     |                 help: remove this `mut`
Dec 19 18:49:59.901 INFO [stderr]     |
Dec 19 18:49:59.901 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 19 18:49:59.901 INFO [stderr] 
Dec 19 18:49:59.957 INFO [stderr] warning: type alias is never used: `WordPosition`
Dec 19 18:49:59.957 INFO [stderr]    --> src/generate.rs:185:5
Dec 19 18:49:59.957 INFO [stderr]     |
Dec 19 18:49:59.957 INFO [stderr] 185 |     type WordPosition = (&'static str, Position);
Dec 19 18:49:59.957 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 18:49:59.957 INFO [stderr]     |
Dec 19 18:49:59.957 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 19 18:49:59.957 INFO [stderr] 
Dec 19 18:49:59.958 INFO [stderr] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
Dec 19 18:49:59.958 INFO [stderr]  --> src/main.rs:1:12
Dec 19 18:49:59.958 INFO [stderr]   |
Dec 19 18:49:59.958 INFO [stderr] 1 | #![feature(conservative_impl_trait)]
Dec 19 18:49:59.958 INFO [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 18:49:59.958 INFO [stderr]   |
Dec 19 18:49:59.958 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 19 18:49:59.958 INFO [stderr] 
Dec 19 18:50:00.024 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.21s
Dec 19 18:50:00.864 INFO running `"docker" "inspect" "604f28b0c4b082a2c28b8ea6165afcd3a4bfdef77d9542d7b35695ee670e84b4"`
Dec 19 18:50:01.062 INFO running `"docker" "rm" "-f" "604f28b0c4b082a2c28b8ea6165afcd3a4bfdef77d9542d7b35695ee670e84b4"`
Dec 19 18:50:01.346 INFO [stdout] 604f28b0c4b082a2c28b8ea6165afcd3a4bfdef77d9542d7b35695ee670e84b4