[INFO] cloning repository https://github.com/NickChubb/ReversiMCTS
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/NickChubb/ReversiMCTS" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNickChubb%2FReversiMCTS", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNickChubb%2FReversiMCTS'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b5b97f02148b27f86abe29ef2208ba68e003234e
[INFO] checking NickChubb/ReversiMCTS against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNickChubb%2FReversiMCTS" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/NickChubb/ReversiMCTS 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/NickChubb/ReversiMCTS
[INFO] finished tweaking git repo https://github.com/NickChubb/ReversiMCTS
[INFO] tweaked toml for git repo https://github.com/NickChubb/ReversiMCTS written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/NickChubb/ReversiMCTS 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f646e8852c0648948f9939dc8090135c705a0c82f442d32f02921081184fce29
[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" "f646e8852c0648948f9939dc8090135c705a0c82f442d32f02921081184fce29", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f646e8852c0648948f9939dc8090135c705a0c82f442d32f02921081184fce29", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f646e8852c0648948f9939dc8090135c705a0c82f442d32f02921081184fce29", kill_on_drop: false }`
[INFO] [stdout] f646e8852c0648948f9939dc8090135c705a0c82f442d32f02921081184fce29
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b2952f15cf4c6ec02e627d8b82485c8c5695f7dbc688a3199888082502b5c5a9
[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" "b2952f15cf4c6ec02e627d8b82485c8c5695f7dbc688a3199888082502b5c5a9", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.73
[INFO] [stderr]    Compiling hashbrown v0.8.1
[INFO] [stderr]    Compiling indexmap v1.5.0
[INFO] [stderr]     Checking aho-corasick v0.7.13
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking libmath v0.2.1
[INFO] [stderr]     Checking reversi v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `prev_player_score`
[INFO] [stdout]    --> src/main.rs:841:10
[INFO] [stdout]     |
[INFO] [stdout] 841 |     let (prev_player_score, prev_cpu_score): (u8, u8) = b.get_score();
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_prev_player_score`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `player_score`
[INFO] [stdout]    --> src/main.rs:857:14
[INFO] [stdout]     |
[INFO] [stdout] 857 |         let (player_score, cpu_score): (u8, u8) = new_board.get_score();
[INFO] [stdout]     |              ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_player_score`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `difficulty`
[INFO] [stdout]    --> src/main.rs:886:13
[INFO] [stdout]     |
[INFO] [stdout] 886 |         let difficulty: String = match cpu_diff.trim().to_string().as_str() {
[INFO] [stdout]     |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_difficulty`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `debug`
[INFO] [stdout]    --> src/main.rs:128:21
[INFO] [stdout]     |
[INFO] [stdout] 128 |     fn print(&self, debug: bool) {
[INFO] [stdout]     |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_debug`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `u` is never read
[INFO] [stdout]    --> src/main.rs:181:13
[INFO] [stdout]     |
[INFO] [stdout] 181 |         let mut u: u8 = 1;
[INFO] [stdout]     |             ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `u` is never read
[INFO] [stdout]    --> src/main.rs:320:13
[INFO] [stdout]     |
[INFO] [stdout] 320 |         let mut u: u8 = 1; // used as the iter for get_new_pos()
[INFO] [stdout]     |             ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/main.rs:715:34
[INFO] [stdout]     |
[INFO] [stdout] 715 |         if !debug { print!("."); stdout().flush(); }
[INFO] [stdout]     |                                  ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `prev_player_score`
[INFO] [stdout]    --> src/main.rs:841:10
[INFO] [stdout]     |
[INFO] [stdout] 841 |     let (prev_player_score, prev_cpu_score): (u8, u8) = b.get_score();
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_prev_player_score`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `player_score`
[INFO] [stdout]    --> src/main.rs:857:14
[INFO] [stdout]     |
[INFO] [stdout] 857 |         let (player_score, cpu_score): (u8, u8) = new_board.get_score();
[INFO] [stdout]     |              ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_player_score`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `difficulty`
[INFO] [stdout]    --> src/main.rs:886:13
[INFO] [stdout]     |
[INFO] [stdout] 886 |         let difficulty: String = match cpu_diff.trim().to_string().as_str() {
[INFO] [stdout]     |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_difficulty`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `debug`
[INFO] [stdout]    --> src/main.rs:128:21
[INFO] [stdout]     |
[INFO] [stdout] 128 |     fn print(&self, debug: bool) {
[INFO] [stdout]     |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_debug`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `u` is never read
[INFO] [stdout]    --> src/main.rs:181:13
[INFO] [stdout]     |
[INFO] [stdout] 181 |         let mut u: u8 = 1;
[INFO] [stdout]     |             ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `u` is never read
[INFO] [stdout]    --> src/main.rs:320:13
[INFO] [stdout]     |
[INFO] [stdout] 320 |         let mut u: u8 = 1; // used as the iter for get_new_pos()
[INFO] [stdout]     |             ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/main.rs:715:34
[INFO] [stdout]     |
[INFO] [stdout] 715 |         if !debug { print!("."); stdout().flush(); }
[INFO] [stdout]     |                                  ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.82s
[INFO] running `Command { std: "docker" "inspect" "b2952f15cf4c6ec02e627d8b82485c8c5695f7dbc688a3199888082502b5c5a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2952f15cf4c6ec02e627d8b82485c8c5695f7dbc688a3199888082502b5c5a9", kill_on_drop: false }`
[INFO] [stdout] b2952f15cf4c6ec02e627d8b82485c8c5695f7dbc688a3199888082502b5c5a9