[INFO] cloning repository https://github.com/starrtnow/mcts-connect-four
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/starrtnow/mcts-connect-four" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstarrtnow%2Fmcts-connect-four", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstarrtnow%2Fmcts-connect-four'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 463ec5ceebff5936c0b2e77abf138dab9a80ab20
[INFO] checking starrtnow/mcts-connect-four against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstarrtnow%2Fmcts-connect-four" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/starrtnow/mcts-connect-four on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/starrtnow/mcts-connect-four
[INFO] finished tweaking git repo https://github.com/starrtnow/mcts-connect-four
[INFO] tweaked toml for git repo https://github.com/starrtnow/mcts-connect-four written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/starrtnow/mcts-connect-four already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d226c1c811d6989d726bb666c9ba051820d11668e9976cff8cf26890621b7bd1
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d226c1c811d6989d726bb666c9ba051820d11668e9976cff8cf26890621b7bd1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d226c1c811d6989d726bb666c9ba051820d11668e9976cff8cf26890621b7bd1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d226c1c811d6989d726bb666c9ba051820d11668e9976cff8cf26890621b7bd1", kill_on_drop: false }`
[INFO] [stdout] d226c1c811d6989d726bb666c9ba051820d11668e9976cff8cf26890621b7bd1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e74c4740d9674571b601deaec98d7cb091261ed7cfea806238077bfdb2535a12
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e74c4740d9674571b601deaec98d7cb091261ed7cfea806238077bfdb2535a12", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.17
[INFO] [stderr]     Checking time v0.1.35
[INFO] [stderr]     Checking rand v0.3.14
[INFO] [stderr]     Checking connect_three v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/game_state.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |         (self.x <= BOARD_WIDTH && self.x  >= 0)
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/game_state.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 |         if (column[i] == Color::Empty){
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/monte_carlo.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |         (self.win_tie as f64 / self.num_plays as f64)
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/monte_carlo.rs:243:19
[INFO] [stdout]     |
[INFO] [stdout] 243 |                 if(uct > best_uct){
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/game_state.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |         (self.x <= BOARD_WIDTH && self.x  >= 0)
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/game_state.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 |         if (column[i] == Color::Empty){
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]    --> src/game_state.rs:190:9
[INFO] [stdout]     |
[INFO] [stdout] 190 |     use super::*; 
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/monte_carlo.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |         (self.win_tie as f64 / self.num_plays as f64)
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/monte_carlo.rs:243:19
[INFO] [stdout]     |
[INFO] [stdout] 243 |                 if(uct > best_uct){
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/game_state.rs:51:14
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn push_back(item : Color, column : &mut [Color; 6]) -> usize{
[INFO] [stdout]    |              ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `player`
[INFO] [stdout]   --> src/monte_carlo.rs:66:54
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub fn run_simulation(state : game_state::GameState, player : game_state::Color) -> game_state::End{ 
[INFO] [stdout]    |                                                      ^^^^^^ help: if this is intentional, prefix it with an underscore: `_player`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/game_state.rs:51:14
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn push_back(item : Color, column : &mut [Color; 6]) -> usize{
[INFO] [stdout]    |              ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `player`
[INFO] [stdout]   --> src/monte_carlo.rs:66:54
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub fn run_simulation(state : game_state::GameState, player : game_state::Color) -> game_state::End{ 
[INFO] [stdout]    |                                                      ^^^^^^ help: if this is intentional, prefix it with an underscore: `_player`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `optimal_move_highest_win`
[INFO] [stdout]    --> src/monte_carlo.rs:161:4
[INFO] [stdout]     |
[INFO] [stdout] 161 | fn optimal_move_highest_win(possible_moves : &Vec<(game_state::Move, &UCTData)>) -> game_state::Move{
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]   --> src/game_state.rs:47:35
[INFO] [stdout]    |
[INFO] [stdout] 47 |         (self.x <= BOARD_WIDTH && self.x  >= 0)
[INFO] [stdout]    |                                   ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `stepX` should have a snake case name
[INFO] [stdout]    --> src/game_state.rs:109:62
[INFO] [stdout]     |
[INFO] [stdout] 109 |     pub fn linear_match(&self, start_x : i32, start_y : i32, stepX : i32, stepY : i32, color : Color) -> bool{
[INFO] [stdout]     |                                                              ^^^^^ help: convert the identifier to snake case: `step_x`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `stepY` should have a snake case name
[INFO] [stdout]    --> src/game_state.rs:109:75
[INFO] [stdout]     |
[INFO] [stdout] 109 |     pub fn linear_match(&self, start_x : i32, start_y : i32, stepX : i32, stepY : i32, color : Color) -> bool{
[INFO] [stdout]     |                                                                           ^^^^^ help: convert the identifier to snake case: `step_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]    --> src/game_state.rs:114:16
[INFO] [stdout]     |
[INFO] [stdout] 114 |             if x < 0 || x >= BOARD_HEIGHT || y < 0 || y >= BOARD_WIDTH{
[INFO] [stdout]     |                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]    --> src/game_state.rs:114:46
[INFO] [stdout]     |
[INFO] [stdout] 114 |             if x < 0 || x >= BOARD_HEIGHT || y < 0 || y >= BOARD_WIDTH{
[INFO] [stdout]     |                                              ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `optimal_move_highest_win`
[INFO] [stdout]    --> src/monte_carlo.rs:161:4
[INFO] [stdout]     |
[INFO] [stdout] 161 | fn optimal_move_highest_win(possible_moves : &Vec<(game_state::Move, &UCTData)>) -> game_state::Move{
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]   --> src/game_state.rs:47:35
[INFO] [stdout]    |
[INFO] [stdout] 47 |         (self.x <= BOARD_WIDTH && self.x  >= 0)
[INFO] [stdout]    |                                   ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `stepX` should have a snake case name
[INFO] [stdout]    --> src/game_state.rs:109:62
[INFO] [stdout]     |
[INFO] [stdout] 109 |     pub fn linear_match(&self, start_x : i32, start_y : i32, stepX : i32, stepY : i32, color : Color) -> bool{
[INFO] [stdout]     |                                                              ^^^^^ help: convert the identifier to snake case: `step_x`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `stepY` should have a snake case name
[INFO] [stdout]    --> src/game_state.rs:109:75
[INFO] [stdout]     |
[INFO] [stdout] 109 |     pub fn linear_match(&self, start_x : i32, start_y : i32, stepX : i32, stepY : i32, color : Color) -> bool{
[INFO] [stdout]     |                                                                           ^^^^^ help: convert the identifier to snake case: `step_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]    --> src/game_state.rs:114:16
[INFO] [stdout]     |
[INFO] [stdout] 114 |             if x < 0 || x >= BOARD_HEIGHT || y < 0 || y >= BOARD_WIDTH{
[INFO] [stdout]     |                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]    --> src/game_state.rs:114:46
[INFO] [stdout]     |
[INFO] [stdout] 114 |             if x < 0 || x >= BOARD_HEIGHT || y < 0 || y >= BOARD_WIDTH{
[INFO] [stdout]     |                                              ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.28s
[INFO] running `Command { std: "docker" "inspect" "e74c4740d9674571b601deaec98d7cb091261ed7cfea806238077bfdb2535a12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e74c4740d9674571b601deaec98d7cb091261ed7cfea806238077bfdb2535a12", kill_on_drop: false }`
[INFO] [stdout] e74c4740d9674571b601deaec98d7cb091261ed7cfea806238077bfdb2535a12