Dec 11 20:37:17.351 INFO checking conundrumer/crossword against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 11 20:37:17.351 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-2/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/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 +3a75e80557a103497cffbcab395a2f37061a77ea-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 11 20:37:17.843 INFO [stdout] 88dc361e0bd23adead5bf05beae5f5f39541e689b14df4f46fb0760ce0c136f0
Dec 11 20:37:17.845 INFO running `"docker" "start" "-a" "88dc361e0bd23adead5bf05beae5f5f39541e689b14df4f46fb0760ce0c136f0"`
Dec 11 20:37:19.636 INFO [stderr] usermod: no changes
Dec 11 20:37:19.704 INFO [stderr]     Checking crossword v0.1.0 (/source)
Dec 11 20:37:20.276 INFO [stderr] warning: unnecessary parentheses around function argument
Dec 11 20:37:20.276 INFO [stderr]   --> src/grid.rs:25:21
Dec 11 20:37:20.276 INFO [stderr]    |
Dec 11 20:37:20.276 INFO [stderr] 25 |         vec![Empty; ((bb.width() as usize) * (bb.height() as usize))]
Dec 11 20:37:20.276 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Dec 11 20:37:20.276 INFO [stderr]    |
Dec 11 20:37:20.276 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Dec 11 20:37:20.276 INFO [stderr] 
Dec 11 20:37:20.540 INFO [stderr] warning: unnecessary parentheses around function argument
Dec 11 20:37:20.540 INFO [stderr]   --> src/grid.rs:25:21
Dec 11 20:37:20.541 INFO [stderr]    |
Dec 11 20:37:20.541 INFO [stderr] 25 |         vec![Empty; ((bb.width() as usize) * (bb.height() as usize))]
Dec 11 20:37:20.541 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Dec 11 20:37:20.541 INFO [stderr]    |
Dec 11 20:37:20.541 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Dec 11 20:37:20.541 INFO [stderr] 
Dec 11 20:37:20.769 INFO [stderr] warning: variable does not need to be mutable
Dec 11 20:37:20.769 INFO [stderr]    --> src/filter.rs:115:17
Dec 11 20:37:20.769 INFO [stderr]     |
Dec 11 20:37:20.769 INFO [stderr] 115 |             let mut seen = &mut self.seen.borrow_mut();
Dec 11 20:37:20.769 INFO [stderr]     |                 ----^^^^
Dec 11 20:37:20.769 INFO [stderr]     |                 |
Dec 11 20:37:20.769 INFO [stderr]     |                 help: remove this `mut`
Dec 11 20:37:20.769 INFO [stderr]     |
Dec 11 20:37:20.769 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 11 20:37:20.769 INFO [stderr] 
Dec 11 20:37:20.820 INFO [stderr] warning: method is never used: `is_valid`
Dec 11 20:37:20.820 INFO [stderr]   --> src/crossword.rs:38:5
Dec 11 20:37:20.820 INFO [stderr]    |
Dec 11 20:37:20.820 INFO [stderr] 38 |     pub fn is_valid(&self) -> bool {
Dec 11 20:37:20.820 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 20:37:20.821 INFO [stderr]    |
Dec 11 20:37:20.821 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 11 20:37:20.821 INFO [stderr] 
Dec 11 20:37:20.822 INFO [stderr] warning: method is never used: `iter`
Dec 11 20:37:20.822 INFO [stderr]   --> src/generate.rs:41:5
Dec 11 20:37:20.822 INFO [stderr]    |
Dec 11 20:37:20.822 INFO [stderr] 41 |     pub fn iter<'b>(&'b self) -> Box<Iterator<Item=Crossword> + 'b> {
Dec 11 20:37:20.823 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 20:37:20.823 INFO [stderr] 
Dec 11 20:37:20.823 INFO [stderr] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
Dec 11 20:37:20.823 INFO [stderr]  --> src/main.rs:1:12
Dec 11 20:37:20.824 INFO [stderr]   |
Dec 11 20:37:20.824 INFO [stderr] 1 | #![feature(conservative_impl_trait)]
Dec 11 20:37:20.824 INFO [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 20:37:20.824 INFO [stderr]   |
Dec 11 20:37:20.824 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 11 20:37:20.825 INFO [stderr] 
Dec 11 20:37:21.174 INFO [stderr] warning: variable does not need to be mutable
Dec 11 20:37:21.174 INFO [stderr]    --> src/filter.rs:115:17
Dec 11 20:37:21.175 INFO [stderr]     |
Dec 11 20:37:21.175 INFO [stderr] 115 |             let mut seen = &mut self.seen.borrow_mut();
Dec 11 20:37:21.175 INFO [stderr]     |                 ----^^^^
Dec 11 20:37:21.176 INFO [stderr]     |                 |
Dec 11 20:37:21.176 INFO [stderr]     |                 help: remove this `mut`
Dec 11 20:37:21.176 INFO [stderr]     |
Dec 11 20:37:21.176 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 11 20:37:21.177 INFO [stderr] 
Dec 11 20:37:21.227 INFO [stderr] warning: type alias is never used: `WordPosition`
Dec 11 20:37:21.227 INFO [stderr]    --> src/generate.rs:185:5
Dec 11 20:37:21.227 INFO [stderr]     |
Dec 11 20:37:21.227 INFO [stderr] 185 |     type WordPosition = (&'static str, Position);
Dec 11 20:37:21.228 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 20:37:21.228 INFO [stderr]     |
Dec 11 20:37:21.228 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 11 20:37:21.228 INFO [stderr] 
Dec 11 20:37:21.229 INFO [stderr] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
Dec 11 20:37:21.229 INFO [stderr]  --> src/main.rs:1:12
Dec 11 20:37:21.229 INFO [stderr]   |
Dec 11 20:37:21.230 INFO [stderr] 1 | #![feature(conservative_impl_trait)]
Dec 11 20:37:21.230 INFO [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 20:37:21.230 INFO [stderr]   |
Dec 11 20:37:21.231 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 11 20:37:21.231 INFO [stderr] 
Dec 11 20:37:21.309 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.65s
Dec 11 20:37:21.312 INFO [stderr] su: No module specific data is present
Dec 11 20:37:22.432 INFO running `"docker" "inspect" "88dc361e0bd23adead5bf05beae5f5f39541e689b14df4f46fb0760ce0c136f0"`
Dec 11 20:37:22.792 INFO running `"docker" "rm" "-f" "88dc361e0bd23adead5bf05beae5f5f39541e689b14df4f46fb0760ce0c136f0"`
Dec 11 20:37:23.152 INFO [stdout] 88dc361e0bd23adead5bf05beae5f5f39541e689b14df4f46fb0760ce0c136f0