Dec 05 07:40:39.706 INFO testing shinkwhek/rs2048 against master#906deae0790bd18681b937fe9a141a3c26cf1855 for pr-56514
Dec 05 07:40:39.706 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-2/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/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 +906deae0790bd18681b937fe9a141a3c26cf1855-alt build --frozen" "-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 05 07:40:40.142 INFO [stdout] be60f612abeb3d09a2bd3b31ba612d763cdc9c5b23a41d49eb33866029585cbe
Dec 05 07:40:40.150 INFO running `"docker" "start" "-a" "be60f612abeb3d09a2bd3b31ba612d763cdc9c5b23a41d49eb33866029585cbe"`
Dec 05 07:40:42.040 INFO [stderr] usermod: no changes
Dec 05 07:40:42.217 INFO [stderr]    Compiling nix v0.5.1
Dec 05 07:40:42.220 INFO [stderr]    Compiling clap v2.31.1
Dec 05 07:40:48.904 INFO [stderr]    Compiling rustyline v1.0.0
Dec 05 07:41:03.508 INFO [stderr]    Compiling rs2048 v0.1.0 (/source)
Dec 05 07:41:04.100 INFO [stderr] warning: variant is never constructed: `Nothing`
Dec 05 07:41:04.100 INFO [stderr]   --> src/board.rs:13:5
Dec 05 07:41:04.100 INFO [stderr]    |
Dec 05 07:41:04.100 INFO [stderr] 13 |     Nothing,
Dec 05 07:41:04.100 INFO [stderr]    |     ^^^^^^^
Dec 05 07:41:04.100 INFO [stderr]    |
Dec 05 07:41:04.100 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 05 07:41:04.100 INFO [stderr] 
Dec 05 07:41:04.100 INFO [stderr] warning: variant is never constructed: `Exist`
Dec 05 07:41:04.100 INFO [stderr]   --> src/board.rs:14:5
Dec 05 07:41:04.100 INFO [stderr]    |
Dec 05 07:41:04.100 INFO [stderr] 14 |     Exist,
Dec 05 07:41:04.100 INFO [stderr]    |     ^^^^^
Dec 05 07:41:04.101 INFO [stderr] 
Dec 05 07:41:04.101 INFO [stderr] warning: method is never used: `new`
Dec 05 07:41:04.101 INFO [stderr]   --> src/board.rs:24:5
Dec 05 07:41:04.101 INFO [stderr]    |
Dec 05 07:41:04.101 INFO [stderr] 24 |     pub fn new(score: usize, status: Status) -> Tile {
Dec 05 07:41:04.101 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:04.101 INFO [stderr] 
Dec 05 07:41:04.101 INFO [stderr] warning: method is never used: `get_score`
Dec 05 07:41:04.101 INFO [stderr]   --> src/board.rs:31:5
Dec 05 07:41:04.101 INFO [stderr]    |
Dec 05 07:41:04.101 INFO [stderr] 31 |     pub fn get_score(&self) -> usize {
Dec 05 07:41:04.101 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:04.101 INFO [stderr] 
Dec 05 07:41:04.101 INFO [stderr] warning: method is never used: `is_exist`
Dec 05 07:41:04.101 INFO [stderr]   --> src/board.rs:35:5
Dec 05 07:41:04.101 INFO [stderr]    |
Dec 05 07:41:04.101 INFO [stderr] 35 |     pub fn is_exist(&self) -> bool {
Dec 05 07:41:04.101 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:04.101 INFO [stderr] 
Dec 05 07:41:04.101 INFO [stderr] warning: method is never used: `is_nothing`
Dec 05 07:41:04.101 INFO [stderr]   --> src/board.rs:39:5
Dec 05 07:41:04.101 INFO [stderr]    |
Dec 05 07:41:04.101 INFO [stderr] 39 |     pub fn is_nothing(&self) -> bool {
Dec 05 07:41:04.101 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:04.101 INFO [stderr] 
Dec 05 07:41:04.101 INFO [stderr] warning: struct is never constructed: `Board`
Dec 05 07:41:04.101 INFO [stderr]   --> src/board.rs:44:1
Dec 05 07:41:04.101 INFO [stderr]    |
Dec 05 07:41:04.101 INFO [stderr] 44 | pub struct Board {
Dec 05 07:41:04.101 INFO [stderr]    | ^^^^^^^^^^^^^^^^
Dec 05 07:41:04.101 INFO [stderr] 
Dec 05 07:41:04.101 INFO [stderr] warning: method is never used: `new`
Dec 05 07:41:04.101 INFO [stderr]   --> src/board.rs:50:5
Dec 05 07:41:04.101 INFO [stderr]    |
Dec 05 07:41:04.101 INFO [stderr] 50 |     pub fn new() -> Board {
Dec 05 07:41:04.101 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:04.101 INFO [stderr] 
Dec 05 07:41:04.101 INFO [stderr] warning: method is never used: `gen`
Dec 05 07:41:04.101 INFO [stderr]   --> src/board.rs:61:5
Dec 05 07:41:04.101 INFO [stderr]    |
Dec 05 07:41:04.101 INFO [stderr] 61 |     pub fn gen(&mut self) {
Dec 05 07:41:04.101 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:04.101 INFO [stderr] 
Dec 05 07:41:04.101 INFO [stderr] warning: method is never used: `color`
Dec 05 07:41:04.101 INFO [stderr]   --> src/board.rs:72:5
Dec 05 07:41:04.101 INFO [stderr]    |
Dec 05 07:41:04.101 INFO [stderr] 72 |     fn color(n: usize) -> Colour {
Dec 05 07:41:04.101 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:04.101 INFO [stderr] 
Dec 05 07:41:04.101 INFO [stderr] warning: method is never used: `format_line`
Dec 05 07:41:04.101 INFO [stderr]   --> src/board.rs:89:5
Dec 05 07:41:04.101 INFO [stderr]    |
Dec 05 07:41:04.101 INFO [stderr] 89 |     fn format_line(&self, n: usize, t: Option<usize>) -> String {
Dec 05 07:41:04.101 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:04.101 INFO [stderr] 
Dec 05 07:41:04.101 INFO [stderr] warning: method is never used: `render`
Dec 05 07:41:04.101 INFO [stderr]    --> src/board.rs:118:5
Dec 05 07:41:04.101 INFO [stderr]     |
Dec 05 07:41:04.101 INFO [stderr] 118 |     pub fn render(&self) {
Dec 05 07:41:04.101 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:04.101 INFO [stderr] 
Dec 05 07:41:04.101 INFO [stderr] warning: method is never used: `get_tile`
Dec 05 07:41:04.101 INFO [stderr]    --> src/board.rs:171:5
Dec 05 07:41:04.101 INFO [stderr]     |
Dec 05 07:41:04.101 INFO [stderr] 171 |     pub fn get_tile(&self, n: usize) -> Option<&Tile> {
Dec 05 07:41:04.101 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:04.101 INFO [stderr] 
Dec 05 07:41:04.101 INFO [stderr] warning: method is never used: `get_score`
Dec 05 07:41:04.102 INFO [stderr]    --> src/board.rs:178:5
Dec 05 07:41:04.102 INFO [stderr]     |
Dec 05 07:41:04.102 INFO [stderr] 178 |     fn get_score(&self) -> usize {
Dec 05 07:41:04.102 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:04.102 INFO [stderr] 
Dec 05 07:41:04.102 INFO [stderr] warning: method is never used: `sum_score`
Dec 05 07:41:04.102 INFO [stderr]    --> src/board.rs:182:5
Dec 05 07:41:04.102 INFO [stderr]     |
Dec 05 07:41:04.102 INFO [stderr] 182 |     fn sum_score(&mut self) {
Dec 05 07:41:04.102 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:04.102 INFO [stderr] 
Dec 05 07:41:04.102 INFO [stderr] warning: method is never used: `render_parameter_box`
Dec 05 07:41:04.102 INFO [stderr]    --> src/board.rs:191:5
Dec 05 07:41:04.102 INFO [stderr]     |
Dec 05 07:41:04.102 INFO [stderr] 191 |     pub fn render_parameter_box(&mut self) {
Dec 05 07:41:04.102 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:04.102 INFO [stderr] 
Dec 05 07:41:04.102 INFO [stderr] warning: method is never used: `fin`
Dec 05 07:41:04.102 INFO [stderr]    --> src/board.rs:216:5
Dec 05 07:41:04.102 INFO [stderr]     |
Dec 05 07:41:04.102 INFO [stderr] 216 |     pub fn fin(&mut self) -> bool {
Dec 05 07:41:04.102 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:04.102 INFO [stderr] 
Dec 05 07:41:04.102 INFO [stderr] warning: struct is never constructed: `Update`
Dec 05 07:41:04.102 INFO [stderr]  --> src/app.rs:7:1
Dec 05 07:41:04.102 INFO [stderr]   |
Dec 05 07:41:04.102 INFO [stderr] 7 | pub struct Update();
Dec 05 07:41:04.102 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:04.102 INFO [stderr] 
Dec 05 07:41:04.102 INFO [stderr] warning: method is never used: `update`
Dec 05 07:41:04.102 INFO [stderr]   --> src/app.rs:10:5
Dec 05 07:41:04.102 INFO [stderr]    |
Dec 05 07:41:04.102 INFO [stderr] 10 |     pub fn update(board: &mut board::Board) {
Dec 05 07:41:04.102 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:04.102 INFO [stderr] 
Dec 05 07:41:04.102 INFO [stderr] warning: method is never used: `up`
Dec 05 07:41:04.102 INFO [stderr]   --> src/app.rs:58:5
Dec 05 07:41:04.102 INFO [stderr]    |
Dec 05 07:41:04.102 INFO [stderr] 58 |     pub fn up(board: &mut board::Board) -> bool {
Dec 05 07:41:04.102 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:04.102 INFO [stderr] 
Dec 05 07:41:04.102 INFO [stderr] warning: method is never used: `down`
Dec 05 07:41:04.102 INFO [stderr]   --> src/app.rs:89:5
Dec 05 07:41:04.102 INFO [stderr]    |
Dec 05 07:41:04.102 INFO [stderr] 89 |     pub fn down(board: &mut board::Board) -> bool {
Dec 05 07:41:04.102 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:04.102 INFO [stderr] 
Dec 05 07:41:04.102 INFO [stderr] warning: method is never used: `left`
Dec 05 07:41:04.102 INFO [stderr]    --> src/app.rs:120:5
Dec 05 07:41:04.102 INFO [stderr]     |
Dec 05 07:41:04.102 INFO [stderr] 120 |     pub fn left(board: &mut board::Board) -> bool {
Dec 05 07:41:04.102 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:04.102 INFO [stderr] 
Dec 05 07:41:04.102 INFO [stderr] warning: method is never used: `right`
Dec 05 07:41:04.102 INFO [stderr]    --> src/app.rs:151:5
Dec 05 07:41:04.102 INFO [stderr]     |
Dec 05 07:41:04.102 INFO [stderr] 151 |     pub fn right(board: &mut board::Board) -> bool {
Dec 05 07:41:04.102 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:04.102 INFO [stderr] 
Dec 05 07:41:04.102 INFO [stderr] warning: method is never used: `is_finished`
Dec 05 07:41:04.102 INFO [stderr]    --> src/app.rs:182:5
Dec 05 07:41:04.102 INFO [stderr]     |
Dec 05 07:41:04.102 INFO [stderr] 182 |     pub fn is_finished(board: &board::Board) -> bool {
Dec 05 07:41:04.102 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:04.102 INFO [stderr] 
Dec 05 07:41:04.695 INFO [stderr] warning: method is never used: `is_nothing`
Dec 05 07:41:04.696 INFO [stderr]   --> src/board.rs:39:5
Dec 05 07:41:04.696 INFO [stderr]    |
Dec 05 07:41:04.696 INFO [stderr] 39 |     pub fn is_nothing(&self) -> bool {
Dec 05 07:41:04.696 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:04.697 INFO [stderr]    |
Dec 05 07:41:04.697 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 05 07:41:04.697 INFO [stderr] 
Dec 05 07:41:05.952 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 23.89s
Dec 05 07:41:05.960 INFO [stderr] su: No module specific data is present
Dec 05 07:41:06.810 INFO running `"docker" "inspect" "be60f612abeb3d09a2bd3b31ba612d763cdc9c5b23a41d49eb33866029585cbe"`
Dec 05 07:41:07.078 INFO running `"docker" "rm" "-f" "be60f612abeb3d09a2bd3b31ba612d763cdc9c5b23a41d49eb33866029585cbe"`
Dec 05 07:41:07.444 INFO [stdout] be60f612abeb3d09a2bd3b31ba612d763cdc9c5b23a41d49eb33866029585cbe
Dec 05 07:41:07.450 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-2/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/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 +906deae0790bd18681b937fe9a141a3c26cf1855-alt test --frozen --no-run" "-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 05 07:41:07.931 INFO [stdout] 6e30a99ba2866df928576da135286e278e575f9247569081a88088fa1e885617
Dec 05 07:41:07.935 INFO running `"docker" "start" "-a" "6e30a99ba2866df928576da135286e278e575f9247569081a88088fa1e885617"`
Dec 05 07:41:09.168 INFO [stderr] usermod: no changes
Dec 05 07:41:09.360 INFO [stderr]    Compiling rs2048 v0.1.0 (/source)
Dec 05 07:41:10.236 INFO [stderr] warning: method is never used: `is_nothing`
Dec 05 07:41:10.236 INFO [stderr]   --> src/board.rs:39:5
Dec 05 07:41:10.236 INFO [stderr]    |
Dec 05 07:41:10.236 INFO [stderr] 39 |     pub fn is_nothing(&self) -> bool {
Dec 05 07:41:10.236 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:10.236 INFO [stderr]    |
Dec 05 07:41:10.236 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 05 07:41:10.236 INFO [stderr] 
Dec 05 07:41:10.392 INFO [stderr] warning: variant is never constructed: `Nothing`
Dec 05 07:41:10.392 INFO [stderr]   --> src/board.rs:13:5
Dec 05 07:41:10.392 INFO [stderr]    |
Dec 05 07:41:10.392 INFO [stderr] 13 |     Nothing,
Dec 05 07:41:10.392 INFO [stderr]    |     ^^^^^^^
Dec 05 07:41:10.392 INFO [stderr]    |
Dec 05 07:41:10.392 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 05 07:41:10.392 INFO [stderr] 
Dec 05 07:41:10.392 INFO [stderr] warning: variant is never constructed: `Exist`
Dec 05 07:41:10.392 INFO [stderr]   --> src/board.rs:14:5
Dec 05 07:41:10.392 INFO [stderr]    |
Dec 05 07:41:10.392 INFO [stderr] 14 |     Exist,
Dec 05 07:41:10.392 INFO [stderr]    |     ^^^^^
Dec 05 07:41:10.393 INFO [stderr] 
Dec 05 07:41:10.393 INFO [stderr] warning: method is never used: `new`
Dec 05 07:41:10.393 INFO [stderr]   --> src/board.rs:24:5
Dec 05 07:41:10.393 INFO [stderr]    |
Dec 05 07:41:10.393 INFO [stderr] 24 |     pub fn new(score: usize, status: Status) -> Tile {
Dec 05 07:41:10.393 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:10.393 INFO [stderr] 
Dec 05 07:41:10.393 INFO [stderr] warning: method is never used: `get_score`
Dec 05 07:41:10.393 INFO [stderr]   --> src/board.rs:31:5
Dec 05 07:41:10.393 INFO [stderr]    |
Dec 05 07:41:10.393 INFO [stderr] 31 |     pub fn get_score(&self) -> usize {
Dec 05 07:41:10.393 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:10.393 INFO [stderr] 
Dec 05 07:41:10.393 INFO [stderr] warning: method is never used: `is_exist`
Dec 05 07:41:10.393 INFO [stderr]   --> src/board.rs:35:5
Dec 05 07:41:10.393 INFO [stderr]    |
Dec 05 07:41:10.393 INFO [stderr] 35 |     pub fn is_exist(&self) -> bool {
Dec 05 07:41:10.393 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:10.393 INFO [stderr] 
Dec 05 07:41:10.393 INFO [stderr] warning: method is never used: `is_nothing`
Dec 05 07:41:10.393 INFO [stderr]   --> src/board.rs:39:5
Dec 05 07:41:10.393 INFO [stderr]    |
Dec 05 07:41:10.393 INFO [stderr] 39 |     pub fn is_nothing(&self) -> bool {
Dec 05 07:41:10.393 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:10.393 INFO [stderr] 
Dec 05 07:41:10.393 INFO [stderr] warning: struct is never constructed: `Board`
Dec 05 07:41:10.393 INFO [stderr]   --> src/board.rs:44:1
Dec 05 07:41:10.393 INFO [stderr]    |
Dec 05 07:41:10.393 INFO [stderr] 44 | pub struct Board {
Dec 05 07:41:10.402 INFO [stderr]    | ^^^^^^^^^^^^^^^^
Dec 05 07:41:10.402 INFO [stderr] 
Dec 05 07:41:10.402 INFO [stderr] warning: method is never used: `new`
Dec 05 07:41:10.402 INFO [stderr]   --> src/board.rs:50:5
Dec 05 07:41:10.402 INFO [stderr]    |
Dec 05 07:41:10.402 INFO [stderr] 50 |     pub fn new() -> Board {
Dec 05 07:41:10.402 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:10.402 INFO [stderr] 
Dec 05 07:41:10.402 INFO [stderr] warning: method is never used: `gen`
Dec 05 07:41:10.402 INFO [stderr]   --> src/board.rs:61:5
Dec 05 07:41:10.402 INFO [stderr]    |
Dec 05 07:41:10.402 INFO [stderr] 61 |     pub fn gen(&mut self) {
Dec 05 07:41:10.402 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:10.402 INFO [stderr] 
Dec 05 07:41:10.402 INFO [stderr] warning: method is never used: `color`
Dec 05 07:41:10.402 INFO [stderr]   --> src/board.rs:72:5
Dec 05 07:41:10.402 INFO [stderr]    |
Dec 05 07:41:10.402 INFO [stderr] 72 |     fn color(n: usize) -> Colour {
Dec 05 07:41:10.402 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:10.402 INFO [stderr] 
Dec 05 07:41:10.402 INFO [stderr] warning: method is never used: `format_line`
Dec 05 07:41:10.402 INFO [stderr]   --> src/board.rs:89:5
Dec 05 07:41:10.402 INFO [stderr]    |
Dec 05 07:41:10.402 INFO [stderr] 89 |     fn format_line(&self, n: usize, t: Option<usize>) -> String {
Dec 05 07:41:10.402 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:10.402 INFO [stderr] 
Dec 05 07:41:10.402 INFO [stderr] warning: method is never used: `render`
Dec 05 07:41:10.402 INFO [stderr]    --> src/board.rs:118:5
Dec 05 07:41:10.402 INFO [stderr]     |
Dec 05 07:41:10.402 INFO [stderr] 118 |     pub fn render(&self) {
Dec 05 07:41:10.402 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:10.402 INFO [stderr] 
Dec 05 07:41:10.402 INFO [stderr] warning: method is never used: `get_tile`
Dec 05 07:41:10.402 INFO [stderr]    --> src/board.rs:171:5
Dec 05 07:41:10.402 INFO [stderr]     |
Dec 05 07:41:10.402 INFO [stderr] 171 |     pub fn get_tile(&self, n: usize) -> Option<&Tile> {
Dec 05 07:41:10.402 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:10.402 INFO [stderr] 
Dec 05 07:41:10.402 INFO [stderr] warning: method is never used: `get_score`
Dec 05 07:41:10.402 INFO [stderr]    --> src/board.rs:178:5
Dec 05 07:41:10.402 INFO [stderr]     |
Dec 05 07:41:10.402 INFO [stderr] 178 |     fn get_score(&self) -> usize {
Dec 05 07:41:10.402 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:10.402 INFO [stderr] 
Dec 05 07:41:10.402 INFO [stderr] warning: method is never used: `sum_score`
Dec 05 07:41:10.403 INFO [stderr]    --> src/board.rs:182:5
Dec 05 07:41:10.403 INFO [stderr]     |
Dec 05 07:41:10.403 INFO [stderr] 182 |     fn sum_score(&mut self) {
Dec 05 07:41:10.403 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:10.403 INFO [stderr] 
Dec 05 07:41:10.403 INFO [stderr] warning: method is never used: `render_parameter_box`
Dec 05 07:41:10.403 INFO [stderr]    --> src/board.rs:191:5
Dec 05 07:41:10.403 INFO [stderr]     |
Dec 05 07:41:10.403 INFO [stderr] 191 |     pub fn render_parameter_box(&mut self) {
Dec 05 07:41:10.403 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:10.403 INFO [stderr] 
Dec 05 07:41:10.403 INFO [stderr] warning: method is never used: `fin`
Dec 05 07:41:10.403 INFO [stderr]    --> src/board.rs:216:5
Dec 05 07:41:10.403 INFO [stderr]     |
Dec 05 07:41:10.403 INFO [stderr] 216 |     pub fn fin(&mut self) -> bool {
Dec 05 07:41:10.403 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:10.403 INFO [stderr] 
Dec 05 07:41:10.403 INFO [stderr] warning: struct is never constructed: `Update`
Dec 05 07:41:10.403 INFO [stderr]  --> src/app.rs:7:1
Dec 05 07:41:10.403 INFO [stderr]   |
Dec 05 07:41:10.403 INFO [stderr] 7 | pub struct Update();
Dec 05 07:41:10.403 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:10.403 INFO [stderr] 
Dec 05 07:41:10.403 INFO [stderr] warning: method is never used: `update`
Dec 05 07:41:10.403 INFO [stderr]   --> src/app.rs:10:5
Dec 05 07:41:10.403 INFO [stderr]    |
Dec 05 07:41:10.403 INFO [stderr] 10 |     pub fn update(board: &mut board::Board) {
Dec 05 07:41:10.403 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:10.403 INFO [stderr] 
Dec 05 07:41:10.403 INFO [stderr] warning: method is never used: `up`
Dec 05 07:41:10.403 INFO [stderr]   --> src/app.rs:58:5
Dec 05 07:41:10.403 INFO [stderr]    |
Dec 05 07:41:10.403 INFO [stderr] 58 |     pub fn up(board: &mut board::Board) -> bool {
Dec 05 07:41:10.403 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:10.403 INFO [stderr] 
Dec 05 07:41:10.403 INFO [stderr] warning: method is never used: `down`
Dec 05 07:41:10.403 INFO [stderr]   --> src/app.rs:89:5
Dec 05 07:41:10.403 INFO [stderr]    |
Dec 05 07:41:10.403 INFO [stderr] 89 |     pub fn down(board: &mut board::Board) -> bool {
Dec 05 07:41:10.403 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:10.403 INFO [stderr] 
Dec 05 07:41:10.403 INFO [stderr] warning: method is never used: `left`
Dec 05 07:41:10.403 INFO [stderr]    --> src/app.rs:120:5
Dec 05 07:41:10.403 INFO [stderr]     |
Dec 05 07:41:10.403 INFO [stderr] 120 |     pub fn left(board: &mut board::Board) -> bool {
Dec 05 07:41:10.403 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:10.403 INFO [stderr] 
Dec 05 07:41:10.403 INFO [stderr] warning: method is never used: `right`
Dec 05 07:41:10.403 INFO [stderr]    --> src/app.rs:151:5
Dec 05 07:41:10.403 INFO [stderr]     |
Dec 05 07:41:10.403 INFO [stderr] 151 |     pub fn right(board: &mut board::Board) -> bool {
Dec 05 07:41:10.403 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:10.403 INFO [stderr] 
Dec 05 07:41:10.403 INFO [stderr] warning: method is never used: `is_finished`
Dec 05 07:41:10.403 INFO [stderr]    --> src/app.rs:182:5
Dec 05 07:41:10.403 INFO [stderr]     |
Dec 05 07:41:10.403 INFO [stderr] 182 |     pub fn is_finished(board: &board::Board) -> bool {
Dec 05 07:41:10.403 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:41:10.408 INFO [stderr] 
Dec 05 07:41:10.957 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.76s
Dec 05 07:41:10.964 INFO [stderr] su: No module specific data is present
Dec 05 07:41:12.061 INFO running `"docker" "inspect" "6e30a99ba2866df928576da135286e278e575f9247569081a88088fa1e885617"`
Dec 05 07:41:12.462 INFO running `"docker" "rm" "-f" "6e30a99ba2866df928576da135286e278e575f9247569081a88088fa1e885617"`
Dec 05 07:41:12.761 INFO [stdout] 6e30a99ba2866df928576da135286e278e575f9247569081a88088fa1e885617
Dec 05 07:41:12.766 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-2/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/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 +906deae0790bd18681b937fe9a141a3c26cf1855-alt test --frozen" "-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 05 07:41:13.288 INFO [stdout] 39a87f64ece617876ebc56701a1de74701448a3f89092f40161fbcdb6b192f73
Dec 05 07:41:13.289 INFO running `"docker" "start" "-a" "39a87f64ece617876ebc56701a1de74701448a3f89092f40161fbcdb6b192f73"`
Dec 05 07:41:14.872 INFO [stderr] usermod: no changes
Dec 05 07:41:14.984 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.08s
Dec 05 07:41:14.984 INFO [stdout] 
Dec 05 07:41:14.984 INFO [stderr]      Running /target/debug/deps/rs2048-1eddc6296dc066dd
Dec 05 07:41:14.984 INFO [stdout] running 0 tests
Dec 05 07:41:14.985 INFO [stdout] 
Dec 05 07:41:14.985 INFO [stderr]      Running /target/debug/deps/rs2048-a55f84c322650f52
Dec 05 07:41:14.985 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 05 07:41:14.985 INFO [stdout] 
Dec 05 07:41:14.985 INFO [stdout] 
Dec 05 07:41:14.985 INFO [stdout] running 0 tests
Dec 05 07:41:14.985 INFO [stdout] 
Dec 05 07:41:14.985 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 05 07:41:14.985 INFO [stdout] 
Dec 05 07:41:14.988 INFO [stderr]    Doc-tests rs2048
Dec 05 07:41:15.508 INFO [stdout] 
Dec 05 07:41:15.508 INFO [stdout] running 0 tests
Dec 05 07:41:15.508 INFO [stdout] 
Dec 05 07:41:15.508 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 05 07:41:15.508 INFO [stdout] 
Dec 05 07:41:15.513 INFO [stderr] su: No module specific data is present
Dec 05 07:41:16.252 INFO running `"docker" "inspect" "39a87f64ece617876ebc56701a1de74701448a3f89092f40161fbcdb6b192f73"`
Dec 05 07:41:16.566 INFO running `"docker" "rm" "-f" "39a87f64ece617876ebc56701a1de74701448a3f89092f40161fbcdb6b192f73"`
Dec 05 07:41:16.836 INFO [stdout] 39a87f64ece617876ebc56701a1de74701448a3f89092f40161fbcdb6b192f73