Dec 17 12:25:09.462 INFO checking voelklmichael/varidor against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 12:25:09.462 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-7/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/voelklmichael/varidor:/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 12:25:09.932 INFO [stdout] b4c835ae9a48a403b22c8a9efd40c6d02a93ea5061edefd5c97c17ece179f9af
Dec 17 12:25:09.935 INFO running `"docker" "start" "-a" "b4c835ae9a48a403b22c8a9efd40c6d02a93ea5061edefd5c97c17ece179f9af"`
Dec 17 12:25:11.181 INFO [stderr]     Checking num-traits v0.2.0
Dec 17 12:25:12.226 INFO [stderr]     Checking varidor v0.1.0 (/opt/crater/workdir)
Dec 17 12:25:12.871 INFO [stderr] warning: type alias is never used: `SquareBoard3`
Dec 17 12:25:12.871 INFO [stderr]   --> src/board_square/square_board3.rs:36:1
Dec 17 12:25:12.871 INFO [stderr]    |
Dec 17 12:25:12.871 INFO [stderr] 36 | / pub type SquareBoard3 =
Dec 17 12:25:12.871 INFO [stderr] 37 | |     SquareBoard<usize, Usize3, [WallPlaced; 2 * 3 * (3 - 1)], [WallCrossing; (3 - 1) * (3 - 1)]>;
Dec 17 12:25:12.871 INFO [stderr]    | |_________________________________________________________________________________________________^
Dec 17 12:25:12.871 INFO [stderr]    |
Dec 17 12:25:12.871 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 12:25:12.871 INFO [stderr] 
Dec 17 12:25:12.871 INFO [stderr] warning: type alias is never used: `SquareBoard4`
Dec 17 12:25:12.871 INFO [stderr]   --> src/board_square/square_board4.rs:36:1
Dec 17 12:25:12.871 INFO [stderr]    |
Dec 17 12:25:12.871 INFO [stderr] 36 | / pub type SquareBoard4 =
Dec 17 12:25:12.871 INFO [stderr] 37 | |     SquareBoard<usize, Usize4, [WallPlaced; 2 * 4 * (4 - 1)], [WallCrossing; (4 - 1) * (4 - 1)]>;
Dec 17 12:25:12.871 INFO [stderr]    | |_________________________________________________________________________________________________^
Dec 17 12:25:12.871 INFO [stderr] 
Dec 17 12:25:12.871 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 17 12:25:12.871 INFO [stderr]    --> src/board_square/mod.rs:175:13
Dec 17 12:25:12.871 INFO [stderr]     |
Dec 17 12:25:12.871 INFO [stderr] 175 | /             new_visited_fields
Dec 17 12:25:12.871 INFO [stderr] 176 | |                 .iter()
Dec 17 12:25:12.871 INFO [stderr] 177 | |                 .map(|&x| visited_fields.push(x))
Dec 17 12:25:12.871 INFO [stderr] 178 | |                 .collect::<Vec<_>>();
Dec 17 12:25:12.871 INFO [stderr]     | |_____________________________________^
Dec 17 12:25:12.871 INFO [stderr]     |
Dec 17 12:25:12.871 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 17 12:25:12.871 INFO [stderr]     = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 17 12:25:12.871 INFO [stderr] 
Dec 17 12:25:12.922 INFO [stderr] warning: type alias is never used: `Usize4`
Dec 17 12:25:12.922 INFO [stderr]   --> src/board_square/type_level_integers.rs:33:1
Dec 17 12:25:12.922 INFO [stderr]    |
Dec 17 12:25:12.922 INFO [stderr] 33 | pub type Usize4 = UsizeNext<Usize3>;
Dec 17 12:25:12.922 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 12:25:12.922 INFO [stderr]    |
Dec 17 12:25:12.922 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 12:25:12.922 INFO [stderr] 
Dec 17 12:25:12.922 INFO [stderr] warning: type alias is never used: `Usize5`
Dec 17 12:25:12.922 INFO [stderr]   --> src/board_square/type_level_integers.rs:34:1
Dec 17 12:25:12.922 INFO [stderr]    |
Dec 17 12:25:12.922 INFO [stderr] 34 | pub type Usize5 = UsizeNext<Usize4>;
Dec 17 12:25:12.922 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 12:25:12.922 INFO [stderr] 
Dec 17 12:25:12.922 INFO [stderr] warning: method is never used: `wall_lookup_unsafe`
Dec 17 12:25:12.922 INFO [stderr]    --> src/board_square/square_board.rs:200:5
Dec 17 12:25:12.922 INFO [stderr]     |
Dec 17 12:25:12.922 INFO [stderr] 200 | /     pub fn wall_lookup_unsafe(
Dec 17 12:25:12.922 INFO [stderr] 201 | |         &self,
Dec 17 12:25:12.922 INFO [stderr] 202 | |         lower_left_field: FieldIndexSquare<T>,
Dec 17 12:25:12.922 INFO [stderr] 203 | |         is_left_or_right: bool,
Dec 17 12:25:12.922 INFO [stderr] ...   |
Dec 17 12:25:12.922 INFO [stderr] 209 | |         )
Dec 17 12:25:12.922 INFO [stderr] 210 | |     }
Dec 17 12:25:12.922 INFO [stderr]     | |_____^
Dec 17 12:25:12.922 INFO [stderr] 
Dec 17 12:25:12.922 INFO [stderr] warning: method is never used: `croosing_lookup_unsafe`
Dec 17 12:25:12.922 INFO [stderr]    --> src/board_square/square_board.rs:211:5
Dec 17 12:25:12.922 INFO [stderr]     |
Dec 17 12:25:12.922 INFO [stderr] 211 |     pub fn croosing_lookup_unsafe(&self, lower_left_field: FieldIndexSquare<T>) -> WallCrossing {
Dec 17 12:25:12.922 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 12:25:12.922 INFO [stderr] 
Dec 17 12:25:12.922 INFO [stderr] warning: type alias is never used: `SquareBoard5`
Dec 17 12:25:12.922 INFO [stderr]   --> src/board_square/square_board5.rs:36:1
Dec 17 12:25:12.922 INFO [stderr]    |
Dec 17 12:25:12.922 INFO [stderr] 36 | / pub type SquareBoard5 =
Dec 17 12:25:12.922 INFO [stderr] 37 | |     SquareBoard<usize, Usize5, [WallPlaced; 2 * 5 * (5 - 1)], [WallCrossing; (5 - 1) * (5 - 1)]>;
Dec 17 12:25:12.922 INFO [stderr]    | |_________________________________________________________________________________________________^
Dec 17 12:25:12.922 INFO [stderr] 
Dec 17 12:25:12.922 INFO [stderr] warning: type alias is never used: `SquareBoard4`
Dec 17 12:25:12.922 INFO [stderr]   --> src/board_square/square_board4.rs:36:1
Dec 17 12:25:12.922 INFO [stderr]    |
Dec 17 12:25:12.922 INFO [stderr] 36 | / pub type SquareBoard4 =
Dec 17 12:25:12.922 INFO [stderr] 37 | |     SquareBoard<usize, Usize4, [WallPlaced; 2 * 4 * (4 - 1)], [WallCrossing; (4 - 1) * (4 - 1)]>;
Dec 17 12:25:12.922 INFO [stderr]    | |_________________________________________________________________________________________________^
Dec 17 12:25:12.922 INFO [stderr] 
Dec 17 12:25:12.922 INFO [stderr] warning: variant is never constructed: `NotConnected`
Dec 17 12:25:12.922 INFO [stderr]   --> src/board_square/mod.rs:48:5
Dec 17 12:25:12.922 INFO [stderr]    |
Dec 17 12:25:12.922 INFO [stderr] 48 |     NotConnected,
Dec 17 12:25:12.922 INFO [stderr]    |     ^^^^^^^^^^^^
Dec 17 12:25:12.922 INFO [stderr] 
Dec 17 12:25:12.922 INFO [stderr] warning: variant is never constructed: `FieldsNotAdjacent`
Dec 17 12:25:12.922 INFO [stderr]   --> src/board_square/mod.rs:53:5
Dec 17 12:25:12.922 INFO [stderr]    |
Dec 17 12:25:12.922 INFO [stderr] 53 |     FieldsNotAdjacent,
Dec 17 12:25:12.922 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^
Dec 17 12:25:12.922 INFO [stderr] 
Dec 17 12:25:12.923 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 17 12:25:12.923 INFO [stderr]    --> src/board_square/mod.rs:175:13
Dec 17 12:25:12.923 INFO [stderr]     |
Dec 17 12:25:12.923 INFO [stderr] 175 | /             new_visited_fields
Dec 17 12:25:12.923 INFO [stderr] 176 | |                 .iter()
Dec 17 12:25:12.923 INFO [stderr] 177 | |                 .map(|&x| visited_fields.push(x))
Dec 17 12:25:12.923 INFO [stderr] 178 | |                 .collect::<Vec<_>>();
Dec 17 12:25:12.923 INFO [stderr]     | |_____________________________________^
Dec 17 12:25:12.923 INFO [stderr]     |
Dec 17 12:25:12.923 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 17 12:25:12.923 INFO [stderr]     = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 17 12:25:12.923 INFO [stderr] 
Dec 17 12:25:12.950 INFO [stderr] warning: type alias is never used: `SquareBoard3`
Dec 17 12:25:12.950 INFO [stderr]   --> src/board_square/square_board3.rs:36:1
Dec 17 12:25:12.950 INFO [stderr]    |
Dec 17 12:25:12.950 INFO [stderr] 36 | / pub type SquareBoard3 =
Dec 17 12:25:12.950 INFO [stderr] 37 | |     SquareBoard<usize, Usize3, [WallPlaced; 2 * 3 * (3 - 1)], [WallCrossing; (3 - 1) * (3 - 1)]>;
Dec 17 12:25:12.950 INFO [stderr]    | |_________________________________________________________________________________________________^
Dec 17 12:25:12.950 INFO [stderr]    |
Dec 17 12:25:12.950 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 12:25:12.950 INFO [stderr] 
Dec 17 12:25:12.950 INFO [stderr] warning: type alias is never used: `SquareBoard4`
Dec 17 12:25:12.950 INFO [stderr]   --> src/board_square/square_board4.rs:36:1
Dec 17 12:25:12.950 INFO [stderr]    |
Dec 17 12:25:12.950 INFO [stderr] 36 | / pub type SquareBoard4 =
Dec 17 12:25:12.950 INFO [stderr] 37 | |     SquareBoard<usize, Usize4, [WallPlaced; 2 * 4 * (4 - 1)], [WallCrossing; (4 - 1) * (4 - 1)]>;
Dec 17 12:25:12.951 INFO [stderr]    | |_________________________________________________________________________________________________^
Dec 17 12:25:12.951 INFO [stderr] 
Dec 17 12:25:12.951 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 17 12:25:12.951 INFO [stderr]    --> src/board_square/mod.rs:175:13
Dec 17 12:25:12.951 INFO [stderr]     |
Dec 17 12:25:12.951 INFO [stderr] 175 | /             new_visited_fields
Dec 17 12:25:12.951 INFO [stderr] 176 | |                 .iter()
Dec 17 12:25:12.951 INFO [stderr] 177 | |                 .map(|&x| visited_fields.push(x))
Dec 17 12:25:12.951 INFO [stderr] 178 | |                 .collect::<Vec<_>>();
Dec 17 12:25:12.951 INFO [stderr]     | |_____________________________________^
Dec 17 12:25:12.951 INFO [stderr]     |
Dec 17 12:25:12.951 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 17 12:25:12.951 INFO [stderr]     = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 17 12:25:12.951 INFO [stderr] 
Dec 17 12:25:13.092 INFO [stderr] warning: type alias is never used: `Usize4`
Dec 17 12:25:13.092 INFO [stderr]   --> src/board_square/type_level_integers.rs:33:1
Dec 17 12:25:13.092 INFO [stderr]    |
Dec 17 12:25:13.092 INFO [stderr] 33 | pub type Usize4 = UsizeNext<Usize3>;
Dec 17 12:25:13.092 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 12:25:13.092 INFO [stderr]    |
Dec 17 12:25:13.092 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 12:25:13.092 INFO [stderr] 
Dec 17 12:25:13.092 INFO [stderr] warning: type alias is never used: `Usize5`
Dec 17 12:25:13.092 INFO [stderr]   --> src/board_square/type_level_integers.rs:34:1
Dec 17 12:25:13.092 INFO [stderr]    |
Dec 17 12:25:13.092 INFO [stderr] 34 | pub type Usize5 = UsizeNext<Usize4>;
Dec 17 12:25:13.092 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 12:25:13.092 INFO [stderr] 
Dec 17 12:25:13.092 INFO [stderr] warning: method is never used: `wall_lookup_unsafe`
Dec 17 12:25:13.092 INFO [stderr]    --> src/board_square/square_board.rs:200:5
Dec 17 12:25:13.092 INFO [stderr]     |
Dec 17 12:25:13.092 INFO [stderr] 200 | /     pub fn wall_lookup_unsafe(
Dec 17 12:25:13.092 INFO [stderr] 201 | |         &self,
Dec 17 12:25:13.092 INFO [stderr] 202 | |         lower_left_field: FieldIndexSquare<T>,
Dec 17 12:25:13.092 INFO [stderr] 203 | |         is_left_or_right: bool,
Dec 17 12:25:13.092 INFO [stderr] ...   |
Dec 17 12:25:13.092 INFO [stderr] 209 | |         )
Dec 17 12:25:13.092 INFO [stderr] 210 | |     }
Dec 17 12:25:13.092 INFO [stderr]     | |_____^
Dec 17 12:25:13.092 INFO [stderr] 
Dec 17 12:25:13.092 INFO [stderr] warning: method is never used: `croosing_lookup_unsafe`
Dec 17 12:25:13.092 INFO [stderr]    --> src/board_square/square_board.rs:211:5
Dec 17 12:25:13.093 INFO [stderr]     |
Dec 17 12:25:13.093 INFO [stderr] 211 |     pub fn croosing_lookup_unsafe(&self, lower_left_field: FieldIndexSquare<T>) -> WallCrossing {
Dec 17 12:25:13.093 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 12:25:13.093 INFO [stderr] 
Dec 17 12:25:13.093 INFO [stderr] warning: type alias is never used: `SquareBoard5`
Dec 17 12:25:13.093 INFO [stderr]   --> src/board_square/square_board5.rs:36:1
Dec 17 12:25:13.093 INFO [stderr]    |
Dec 17 12:25:13.093 INFO [stderr] 36 | / pub type SquareBoard5 =
Dec 17 12:25:13.093 INFO [stderr] 37 | |     SquareBoard<usize, Usize5, [WallPlaced; 2 * 5 * (5 - 1)], [WallCrossing; (5 - 1) * (5 - 1)]>;
Dec 17 12:25:13.093 INFO [stderr]    | |_________________________________________________________________________________________________^
Dec 17 12:25:13.093 INFO [stderr] 
Dec 17 12:25:13.093 INFO [stderr] warning: type alias is never used: `SquareBoard4`
Dec 17 12:25:13.093 INFO [stderr]   --> src/board_square/square_board4.rs:36:1
Dec 17 12:25:13.093 INFO [stderr]    |
Dec 17 12:25:13.093 INFO [stderr] 36 | / pub type SquareBoard4 =
Dec 17 12:25:13.093 INFO [stderr] 37 | |     SquareBoard<usize, Usize4, [WallPlaced; 2 * 4 * (4 - 1)], [WallCrossing; (4 - 1) * (4 - 1)]>;
Dec 17 12:25:13.093 INFO [stderr]    | |_________________________________________________________________________________________________^
Dec 17 12:25:13.093 INFO [stderr] 
Dec 17 12:25:13.093 INFO [stderr] warning: variant is never constructed: `NotConnected`
Dec 17 12:25:13.093 INFO [stderr]   --> src/board_square/mod.rs:48:5
Dec 17 12:25:13.093 INFO [stderr]    |
Dec 17 12:25:13.093 INFO [stderr] 48 |     NotConnected,
Dec 17 12:25:13.093 INFO [stderr]    |     ^^^^^^^^^^^^
Dec 17 12:25:13.093 INFO [stderr] 
Dec 17 12:25:13.093 INFO [stderr] warning: variant is never constructed: `FieldsNotAdjacent`
Dec 17 12:25:13.093 INFO [stderr]   --> src/board_square/mod.rs:53:5
Dec 17 12:25:13.093 INFO [stderr]    |
Dec 17 12:25:13.093 INFO [stderr] 53 |     FieldsNotAdjacent,
Dec 17 12:25:13.093 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^
Dec 17 12:25:13.093 INFO [stderr] 
Dec 17 12:25:13.093 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 17 12:25:13.093 INFO [stderr]    --> src/board_square/mod.rs:175:13
Dec 17 12:25:13.093 INFO [stderr]     |
Dec 17 12:25:13.093 INFO [stderr] 175 | /             new_visited_fields
Dec 17 12:25:13.093 INFO [stderr] 176 | |                 .iter()
Dec 17 12:25:13.093 INFO [stderr] 177 | |                 .map(|&x| visited_fields.push(x))
Dec 17 12:25:13.093 INFO [stderr] 178 | |                 .collect::<Vec<_>>();
Dec 17 12:25:13.093 INFO [stderr]     | |_____________________________________^
Dec 17 12:25:13.093 INFO [stderr]     |
Dec 17 12:25:13.093 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 17 12:25:13.093 INFO [stderr]     = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 17 12:25:13.093 INFO [stderr] 
Dec 17 12:25:13.117 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.95s
Dec 17 12:25:13.448 INFO running `"docker" "inspect" "b4c835ae9a48a403b22c8a9efd40c6d02a93ea5061edefd5c97c17ece179f9af"`
Dec 17 12:25:13.585 INFO running `"docker" "rm" "-f" "b4c835ae9a48a403b22c8a9efd40c6d02a93ea5061edefd5c97c17ece179f9af"`
Dec 17 12:25:13.701 INFO [stdout] b4c835ae9a48a403b22c8a9efd40c6d02a93ea5061edefd5c97c17ece179f9af