[INFO] updating cached repository conundrumer/crossword
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/conundrumer/crossword
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/conundrumer/crossword" "work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/conundrumer/crossword"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/conundrumer/crossword'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/conundrumer/crossword" "work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/conundrumer/crossword"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/conundrumer/crossword'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cec0ee1cc7277c14c4afeb48fc9488b7fa941ab3
[INFO] sha for GitHub repo conundrumer/crossword: cec0ee1cc7277c14c4afeb48fc9488b7fa941ab3
[INFO] validating manifest of conundrumer/crossword on toolchain master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of conundrumer/crossword on toolchain try#7fea0229842e79db1159ea58ad9a653b288efee9
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing conundrumer/crossword
[INFO] finished frobbing conundrumer/crossword
[INFO] frobbed toml for conundrumer/crossword written to work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/conundrumer/crossword/Cargo.toml
[INFO] started frobbing conundrumer/crossword
[INFO] finished frobbing conundrumer/crossword
[INFO] frobbed toml for conundrumer/crossword written to work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/conundrumer/crossword/Cargo.toml
[INFO] crate conundrumer/crossword has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing conundrumer/crossword against try#7fea0229842e79db1159ea58ad9a653b288efee9 for pr-57967
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-2/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "build" "--frozen"`
[INFO] [stdout] a7375d0cdc443b53d4d81a86d31c12615cb6f95bf982eaa49178af040b2cede0
[INFO] running `"docker" "start" "-a" "a7375d0cdc443b53d4d81a86d31c12615cb6f95bf982eaa49178af040b2cede0"`
[INFO] [stderr]    Compiling crossword v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> src/grid.rs:25:21
[INFO] [stderr]    |
[INFO] [stderr] 25 |         vec![Empty; ((bb.width() as usize) * (bb.height() as usize))]
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/filter.rs:115:17
[INFO] [stderr]     |
[INFO] [stderr] 115 |             let mut seen = &mut self.seen.borrow_mut();
[INFO] [stderr]     |                 ----^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `GridCellPos`
[INFO] [stderr]  --> src/grid_cell.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | type GridCellPos = (GridCell, (i8, i8));
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_valid`
[INFO] [stderr]   --> src/crossword.rs:38:5
[INFO] [stderr]    |
[INFO] [stderr] 38 |     pub fn is_valid(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `iter`
[INFO] [stderr]   --> src/generate.rs:41:5
[INFO] [stderr]    |
[INFO] [stderr] 41 |     pub fn iter<'b>(&'b self) -> Box<Iterator<Item=Crossword> + 'b> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(conservative_impl_trait)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(stable_features)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.17s
[INFO] running `"docker" "inspect" "a7375d0cdc443b53d4d81a86d31c12615cb6f95bf982eaa49178af040b2cede0"`
[INFO] running `"docker" "rm" "-f" "a7375d0cdc443b53d4d81a86d31c12615cb6f95bf982eaa49178af040b2cede0"`
[INFO] [stdout] a7375d0cdc443b53d4d81a86d31c12615cb6f95bf982eaa49178af040b2cede0
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-2/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] b45d7e308d02bfa061daa7c61439624dd3539b6c41d404f5db84c1bc6f9b5cbc
[INFO] running `"docker" "start" "-a" "b45d7e308d02bfa061daa7c61439624dd3539b6c41d404f5db84c1bc6f9b5cbc"`
[INFO] [stderr]    Compiling crossword v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> src/grid.rs:25:21
[INFO] [stderr]    |
[INFO] [stderr] 25 |         vec![Empty; ((bb.width() as usize) * (bb.height() as usize))]
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/filter.rs:115:17
[INFO] [stderr]     |
[INFO] [stderr] 115 |             let mut seen = &mut self.seen.borrow_mut();
[INFO] [stderr]     |                 ----^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `GridCellPos`
[INFO] [stderr]  --> src/grid_cell.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | type GridCellPos = (GridCell, (i8, i8));
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `WordPosition`
[INFO] [stderr]    --> src/generate.rs:185:5
[INFO] [stderr]     |
[INFO] [stderr] 185 |     type WordPosition = (&'static str, Position);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(conservative_impl_trait)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(stable_features)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.58s
[INFO] running `"docker" "inspect" "b45d7e308d02bfa061daa7c61439624dd3539b6c41d404f5db84c1bc6f9b5cbc"`
[INFO] running `"docker" "rm" "-f" "b45d7e308d02bfa061daa7c61439624dd3539b6c41d404f5db84c1bc6f9b5cbc"`
[INFO] [stdout] b45d7e308d02bfa061daa7c61439624dd3539b6c41d404f5db84c1bc6f9b5cbc
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-2/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "test" "--frozen"`
[INFO] [stdout] f1fb2e4848e3a8ede7239b0e90728407f4c8e18330758aab89d4c6a4cbcdc15f
[INFO] running `"docker" "start" "-a" "f1fb2e4848e3a8ede7239b0e90728407f4c8e18330758aab89d4c6a4cbcdc15f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/crossword-5e96a7d7e9fbc1c9
[INFO] [stdout] running 21 tests
[INFO] [stdout] test crossword::tests::is_invalid ... ok
[INFO] [stdout] test crossword::tests::is_invalid_adjacent ... ok
[INFO] [stdout] test bench::generate_1 ... ok
[INFO] [stdout] test crossword::tests::is_invalid_touching ... ok
[INFO] [stdout] test crossword::tests::display ... ok
[INFO] [stdout] test crossword::tests::is_valid ... ok
[INFO] [stdout] test crossword::tests::is_valid_diagonal ... ok
[INFO] [stdout] test crossword::tests::bounding_box ... ok
[INFO] [stdout] test crossword::tests::letters ... ok
[INFO] [stdout] test crossword::tests::num_overlaps ... ok
[INFO] [stdout] test generate::tests::letter_block_collision ... ok
[INFO] [stdout] test generate::tests::display ... ok
[INFO] [stdout] test rand::tests::rand_range ... ok
[INFO] [stdout] test word_placements::tests::set ... ok
[INFO] [stdout] test word_placements::tests::hash ... ok
[INFO] [stdout] test grid_cell::tests::letter_block_collision ... ok
[INFO] [stdout] test generate::tests::test_gen_iter ... ok
[INFO] [stdout] test word_placements::tests::new ... ok
[INFO] [stdout] test bench::generate_2 ... ok
[INFO] [stdout] test bench::generate_3 ... ok
[INFO] [stdout] test bench::generate_4 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 21 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "f1fb2e4848e3a8ede7239b0e90728407f4c8e18330758aab89d4c6a4cbcdc15f"`
[INFO] running `"docker" "rm" "-f" "f1fb2e4848e3a8ede7239b0e90728407f4c8e18330758aab89d4c6a4cbcdc15f"`
[INFO] [stdout] f1fb2e4848e3a8ede7239b0e90728407f4c8e18330758aab89d4c6a4cbcdc15f