Nov 30 05:05:05.426 INFO checking conundrumer/crossword against try#32252761328f59ccfadb1bafb8148c685bc830b3 for pr-56323
Nov 30 05:05:05.426 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56323/worker-4/try#32252761328f59ccfadb1bafb8148c685bc830b3:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56323/try#32252761328f59ccfadb1bafb8148c685bc830b3:/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 +32252761328f59ccfadb1bafb8148c685bc830b3-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"`
Nov 30 05:05:05.876 INFO [stdout] 08d5d3a5e92ed3a8837888b961c67acd5f03beb8fa223f68916476aa867ca44b
Nov 30 05:05:05.878 INFO running `"docker" "start" "-a" "08d5d3a5e92ed3a8837888b961c67acd5f03beb8fa223f68916476aa867ca44b"`
Nov 30 05:05:07.205 INFO [stderr] usermod: no changes
Nov 30 05:05:07.269 INFO [stderr]     Checking crossword v0.1.0 (/source)
Nov 30 05:05:07.956 INFO [stderr] warning: unnecessary parentheses around function argument
Nov 30 05:05:07.957 INFO [stderr]   --> src/grid.rs:25:21
Nov 30 05:05:07.957 INFO [stderr]    |
Nov 30 05:05:07.957 INFO [stderr] 25 |         vec![Empty; ((bb.width() as usize) * (bb.height() as usize))]
Nov 30 05:05:07.957 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Nov 30 05:05:07.958 INFO [stderr]    |
Nov 30 05:05:07.958 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Nov 30 05:05:07.958 INFO [stderr] 
Nov 30 05:05:07.996 INFO [stderr] warning: unnecessary parentheses around function argument
Nov 30 05:05:07.997 INFO [stderr]   --> src/grid.rs:25:21
Nov 30 05:05:07.997 INFO [stderr]    |
Nov 30 05:05:07.997 INFO [stderr] 25 |         vec![Empty; ((bb.width() as usize) * (bb.height() as usize))]
Nov 30 05:05:07.998 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Nov 30 05:05:07.998 INFO [stderr]    |
Nov 30 05:05:07.998 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Nov 30 05:05:07.998 INFO [stderr] 
Nov 30 05:05:08.488 INFO [stderr] warning: variable does not need to be mutable
Nov 30 05:05:08.488 INFO [stderr]    --> src/filter.rs:115:17
Nov 30 05:05:08.488 INFO [stderr]     |
Nov 30 05:05:08.488 INFO [stderr] 115 |             let mut seen = &mut self.seen.borrow_mut();
Nov 30 05:05:08.488 INFO [stderr]     |                 ----^^^^
Nov 30 05:05:08.488 INFO [stderr]     |                 |
Nov 30 05:05:08.488 INFO [stderr]     |                 help: remove this `mut`
Nov 30 05:05:08.488 INFO [stderr]     |
Nov 30 05:05:08.488 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Nov 30 05:05:08.488 INFO [stderr] 
Nov 30 05:05:08.568 INFO [stderr] warning: type alias is never used: `GridCellPos`
Nov 30 05:05:08.568 INFO [stderr]  --> src/grid_cell.rs:4:1
Nov 30 05:05:08.568 INFO [stderr]   |
Nov 30 05:05:08.568 INFO [stderr] 4 | type GridCellPos = (GridCell, (i8, i8));
Nov 30 05:05:08.568 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 30 05:05:08.568 INFO [stderr]   |
Nov 30 05:05:08.568 INFO [stderr]   = note: #[warn(dead_code)] on by default
Nov 30 05:05:08.568 INFO [stderr] 
Nov 30 05:05:08.568 INFO [stderr] warning: method is never used: `is_valid`
Nov 30 05:05:08.568 INFO [stderr]   --> src/crossword.rs:38:5
Nov 30 05:05:08.568 INFO [stderr]    |
Nov 30 05:05:08.568 INFO [stderr] 38 |     pub fn is_valid(&self) -> bool {
Nov 30 05:05:08.568 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 30 05:05:08.568 INFO [stderr] 
Nov 30 05:05:08.568 INFO [stderr] warning: method is never used: `iter`
Nov 30 05:05:08.568 INFO [stderr]   --> src/generate.rs:41:5
Nov 30 05:05:08.568 INFO [stderr]    |
Nov 30 05:05:08.569 INFO [stderr] 41 |     pub fn iter<'b>(&'b self) -> Box<Iterator<Item=Crossword> + 'b> {
Nov 30 05:05:08.569 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 30 05:05:08.569 INFO [stderr] 
Nov 30 05:05:08.569 INFO [stderr] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
Nov 30 05:05:08.569 INFO [stderr]  --> src/main.rs:1:12
Nov 30 05:05:08.569 INFO [stderr]   |
Nov 30 05:05:08.569 INFO [stderr] 1 | #![feature(conservative_impl_trait)]
Nov 30 05:05:08.569 INFO [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^^
Nov 30 05:05:08.569 INFO [stderr]   |
Nov 30 05:05:08.569 INFO [stderr]   = note: #[warn(stable_features)] on by default
Nov 30 05:05:08.569 INFO [stderr] 
Nov 30 05:05:08.786 INFO [stderr] warning: variable does not need to be mutable
Nov 30 05:05:08.786 INFO [stderr]    --> src/filter.rs:115:17
Nov 30 05:05:08.786 INFO [stderr]     |
Nov 30 05:05:08.786 INFO [stderr] 115 |             let mut seen = &mut self.seen.borrow_mut();
Nov 30 05:05:08.786 INFO [stderr]     |                 ----^^^^
Nov 30 05:05:08.786 INFO [stderr]     |                 |
Nov 30 05:05:08.786 INFO [stderr]     |                 help: remove this `mut`
Nov 30 05:05:08.786 INFO [stderr]     |
Nov 30 05:05:08.786 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Nov 30 05:05:08.786 INFO [stderr] 
Nov 30 05:05:08.851 INFO [stderr] warning: type alias is never used: `GridCellPos`
Nov 30 05:05:08.851 INFO [stderr]  --> src/grid_cell.rs:4:1
Nov 30 05:05:08.851 INFO [stderr]   |
Nov 30 05:05:08.851 INFO [stderr] 4 | type GridCellPos = (GridCell, (i8, i8));
Nov 30 05:05:08.851 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 30 05:05:08.851 INFO [stderr]   |
Nov 30 05:05:08.851 INFO [stderr]   = note: #[warn(dead_code)] on by default
Nov 30 05:05:08.851 INFO [stderr] 
Nov 30 05:05:08.851 INFO [stderr] warning: type alias is never used: `WordPosition`
Nov 30 05:05:08.851 INFO [stderr]    --> src/generate.rs:185:5
Nov 30 05:05:08.851 INFO [stderr]     |
Nov 30 05:05:08.851 INFO [stderr] 185 |     type WordPosition = (&'static str, Position);
Nov 30 05:05:08.851 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 30 05:05:08.851 INFO [stderr] 
Nov 30 05:05:08.852 INFO [stderr] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
Nov 30 05:05:08.852 INFO [stderr]  --> src/main.rs:1:12
Nov 30 05:05:08.852 INFO [stderr]   |
Nov 30 05:05:08.852 INFO [stderr] 1 | #![feature(conservative_impl_trait)]
Nov 30 05:05:08.852 INFO [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^^
Nov 30 05:05:08.852 INFO [stderr]   |
Nov 30 05:05:08.852 INFO [stderr]   = note: #[warn(stable_features)] on by default
Nov 30 05:05:08.852 INFO [stderr] 
Nov 30 05:05:08.912 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.68s
Nov 30 05:05:08.917 INFO [stderr] su: No module specific data is present
Nov 30 05:05:10.242 INFO running `"docker" "inspect" "08d5d3a5e92ed3a8837888b961c67acd5f03beb8fa223f68916476aa867ca44b"`
Nov 30 05:05:10.504 INFO running `"docker" "rm" "-f" "08d5d3a5e92ed3a8837888b961c67acd5f03beb8fa223f68916476aa867ca44b"`
Nov 30 05:05:10.852 INFO [stdout] 08d5d3a5e92ed3a8837888b961c67acd5f03beb8fa223f68916476aa867ca44b