[INFO] updating cached repository starrtnow/mcts-connect-four
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/starrtnow/mcts-connect-four
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/starrtnow/mcts-connect-four" "work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/starrtnow/mcts-connect-four"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/starrtnow/mcts-connect-four'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/starrtnow/mcts-connect-four" "work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/starrtnow/mcts-connect-four"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/starrtnow/mcts-connect-four'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 463ec5ceebff5936c0b2e77abf138dab9a80ab20
[INFO] sha for GitHub repo starrtnow/mcts-connect-four: 463ec5ceebff5936c0b2e77abf138dab9a80ab20
[INFO] validating manifest of starrtnow/mcts-connect-four 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 starrtnow/mcts-connect-four 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 starrtnow/mcts-connect-four
[INFO] finished frobbing starrtnow/mcts-connect-four
[INFO] frobbed toml for starrtnow/mcts-connect-four written to work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/starrtnow/mcts-connect-four/Cargo.toml
[INFO] started frobbing starrtnow/mcts-connect-four
[INFO] finished frobbing starrtnow/mcts-connect-four
[INFO] frobbed toml for starrtnow/mcts-connect-four written to work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/starrtnow/mcts-connect-four/Cargo.toml
[INFO] crate starrtnow/mcts-connect-four has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on the registry index
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing starrtnow/mcts-connect-four against master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54 for pr-57967
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-1/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/starrtnow/mcts-connect-four:/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" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "build" "--frozen"`
[INFO] [stdout] 99ff9470a88ac75cb63a617a09217ccdf915bbc7aa19fb65f588f82ccf0e48cb
[INFO] running `"docker" "start" "-a" "99ff9470a88ac75cb63a617a09217ccdf915bbc7aa19fb65f588f82ccf0e48cb"`
[INFO] [stderr]    Compiling connect_three v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/game_state.rs:53:12
[INFO] [stderr]    |
[INFO] [stderr] 53 |         if (column[i] == Color::Empty){
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]    --> src/monte_carlo.rs:243:19
[INFO] [stderr]     |
[INFO] [stderr] 243 |                 if(uct > best_uct){
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item`
[INFO] [stderr]   --> src/game_state.rs:51:14
[INFO] [stderr]    |
[INFO] [stderr] 51 | fn push_back(item : Color, column : &mut [Color; 6]) -> usize{
[INFO] [stderr]    |              ^^^^ help: consider prefixing with an underscore: `_item`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `player`
[INFO] [stderr]   --> src/monte_carlo.rs:66:54
[INFO] [stderr]    |
[INFO] [stderr] 66 | pub fn run_simulation(state : game_state::GameState, player : game_state::Color) -> game_state::End{ 
[INFO] [stderr]    |                                                      ^^^^^^ help: consider prefixing with an underscore: `_player`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `optimal_move_highest_win`
[INFO] [stderr]    --> src/monte_carlo.rs:161:1
[INFO] [stderr]     |
[INFO] [stderr] 161 | fn optimal_move_highest_win(possible_moves : &Vec<(game_state::Move, &UCTData)>) -> game_state::Move{
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]   --> src/game_state.rs:47:35
[INFO] [stderr]    |
[INFO] [stderr] 47 |         (self.x <= BOARD_WIDTH && self.x  >= 0)
[INFO] [stderr]    |                                   ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_comparisons)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `stepX` should have a snake case name
[INFO] [stderr]    --> src/game_state.rs:109:62
[INFO] [stderr]     |
[INFO] [stderr] 109 |     pub fn linear_match(&self, start_x : i32, start_y : i32, stepX : i32, stepY : i32, color : Color) -> bool{
[INFO] [stderr]     |                                                              ^^^^^ help: convert the identifier to snake case: `step_x`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `stepY` should have a snake case name
[INFO] [stderr]    --> src/game_state.rs:109:75
[INFO] [stderr]     |
[INFO] [stderr] 109 |     pub fn linear_match(&self, start_x : i32, start_y : i32, stepX : i32, stepY : i32, color : Color) -> bool{
[INFO] [stderr]     |                                                                           ^^^^^ help: convert the identifier to snake case: `step_y`
[INFO] [stderr] 
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]    --> src/game_state.rs:114:16
[INFO] [stderr]     |
[INFO] [stderr] 114 |             if x < 0 || x >= BOARD_HEIGHT || y < 0 || y >= BOARD_WIDTH{
[INFO] [stderr]     |                ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]    --> src/game_state.rs:114:46
[INFO] [stderr]     |
[INFO] [stderr] 114 |             if x < 0 || x >= BOARD_HEIGHT || y < 0 || y >= BOARD_WIDTH{
[INFO] [stderr]     |                                              ^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.72s
[INFO] running `"docker" "inspect" "99ff9470a88ac75cb63a617a09217ccdf915bbc7aa19fb65f588f82ccf0e48cb"`
[INFO] running `"docker" "rm" "-f" "99ff9470a88ac75cb63a617a09217ccdf915bbc7aa19fb65f588f82ccf0e48cb"`
[INFO] [stdout] 99ff9470a88ac75cb63a617a09217ccdf915bbc7aa19fb65f588f82ccf0e48cb
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-1/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/starrtnow/mcts-connect-four:/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" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] 5bce4e55d59c89a64ffab2af3d7282fe0a7dc924899c85fadb0bdbfb198aa150
[INFO] running `"docker" "start" "-a" "5bce4e55d59c89a64ffab2af3d7282fe0a7dc924899c85fadb0bdbfb198aa150"`
[INFO] [stderr]    Compiling connect_three v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/game_state.rs:53:12
[INFO] [stderr]    |
[INFO] [stderr] 53 |         if (column[i] == Color::Empty){
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]    --> src/game_state.rs:190:9
[INFO] [stderr]     |
[INFO] [stderr] 190 |     use super::*; 
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]    --> src/monte_carlo.rs:243:19
[INFO] [stderr]     |
[INFO] [stderr] 243 |                 if(uct > best_uct){
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item`
[INFO] [stderr]   --> src/game_state.rs:51:14
[INFO] [stderr]    |
[INFO] [stderr] 51 | fn push_back(item : Color, column : &mut [Color; 6]) -> usize{
[INFO] [stderr]    |              ^^^^ help: consider prefixing with an underscore: `_item`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `player`
[INFO] [stderr]   --> src/monte_carlo.rs:66:54
[INFO] [stderr]    |
[INFO] [stderr] 66 | pub fn run_simulation(state : game_state::GameState, player : game_state::Color) -> game_state::End{ 
[INFO] [stderr]    |                                                      ^^^^^^ help: consider prefixing with an underscore: `_player`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `optimal_move_highest_win`
[INFO] [stderr]    --> src/monte_carlo.rs:161:1
[INFO] [stderr]     |
[INFO] [stderr] 161 | fn optimal_move_highest_win(possible_moves : &Vec<(game_state::Move, &UCTData)>) -> game_state::Move{
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]   --> src/game_state.rs:47:35
[INFO] [stderr]    |
[INFO] [stderr] 47 |         (self.x <= BOARD_WIDTH && self.x  >= 0)
[INFO] [stderr]    |                                   ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_comparisons)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `stepX` should have a snake case name
[INFO] [stderr]    --> src/game_state.rs:109:62
[INFO] [stderr]     |
[INFO] [stderr] 109 |     pub fn linear_match(&self, start_x : i32, start_y : i32, stepX : i32, stepY : i32, color : Color) -> bool{
[INFO] [stderr]     |                                                              ^^^^^ help: convert the identifier to snake case: `step_x`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `stepY` should have a snake case name
[INFO] [stderr]    --> src/game_state.rs:109:75
[INFO] [stderr]     |
[INFO] [stderr] 109 |     pub fn linear_match(&self, start_x : i32, start_y : i32, stepX : i32, stepY : i32, color : Color) -> bool{
[INFO] [stderr]     |                                                                           ^^^^^ help: convert the identifier to snake case: `step_y`
[INFO] [stderr] 
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]    --> src/game_state.rs:114:16
[INFO] [stderr]     |
[INFO] [stderr] 114 |             if x < 0 || x >= BOARD_HEIGHT || y < 0 || y >= BOARD_WIDTH{
[INFO] [stderr]     |                ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]    --> src/game_state.rs:114:46
[INFO] [stderr]     |
[INFO] [stderr] 114 |             if x < 0 || x >= BOARD_HEIGHT || y < 0 || y >= BOARD_WIDTH{
[INFO] [stderr]     |                                              ^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.52s
[INFO] running `"docker" "inspect" "5bce4e55d59c89a64ffab2af3d7282fe0a7dc924899c85fadb0bdbfb198aa150"`
[INFO] running `"docker" "rm" "-f" "5bce4e55d59c89a64ffab2af3d7282fe0a7dc924899c85fadb0bdbfb198aa150"`
[INFO] [stdout] 5bce4e55d59c89a64ffab2af3d7282fe0a7dc924899c85fadb0bdbfb198aa150
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-1/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/starrtnow/mcts-connect-four:/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" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "test" "--frozen"`
[INFO] [stdout] d66d34efb4bd6a433dabb740dc3bf3217bb985e29623a5657f7b55c17ac94c3d
[INFO] running `"docker" "start" "-a" "d66d34efb4bd6a433dabb740dc3bf3217bb985e29623a5657f7b55c17ac94c3d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/connect_three-a2f626f12418193d
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "d66d34efb4bd6a433dabb740dc3bf3217bb985e29623a5657f7b55c17ac94c3d"`
[INFO] running `"docker" "rm" "-f" "d66d34efb4bd6a433dabb740dc3bf3217bb985e29623a5657f7b55c17ac94c3d"`
[INFO] [stdout] d66d34efb4bd6a433dabb740dc3bf3217bb985e29623a5657f7b55c17ac94c3d