[INFO] updating cached repository https://github.com/QuarkNerd/Rust_Noughts_-_Crosses
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 73dda51178265c17d4e5b49501068661cfa675b7
[INFO] checking QuarkNerd/Rust_Noughts_-_Crosses against try#85cc1486e1f000dce4bb8e1b3cfab2b654b102a8 for pr-73323
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FQuarkNerd%2FRust_Noughts_-_Crosses" "/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/QuarkNerd/Rust_Noughts_-_Crosses on toolchain 85cc1486e1f000dce4bb8e1b3cfab2b654b102a8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/QuarkNerd/Rust_Noughts_-_Crosses
[INFO] finished tweaking git repo https://github.com/QuarkNerd/Rust_Noughts_-_Crosses
[INFO] tweaked toml for git repo https://github.com/QuarkNerd/Rust_Noughts_-_Crosses written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/QuarkNerd/Rust_Noughts_-_Crosses already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e3d3fd46b32ec7438e1627289fb3bc7c39d2d14ca7b1a1ab8f67e3294e4d7f6f
[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" "e3d3fd46b32ec7438e1627289fb3bc7c39d2d14ca7b1a1ab8f67e3294e4d7f6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e3d3fd46b32ec7438e1627289fb3bc7c39d2d14ca7b1a1ab8f67e3294e4d7f6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3d3fd46b32ec7438e1627289fb3bc7c39d2d14ca7b1a1ab8f67e3294e4d7f6f", kill_on_drop: false }`
[INFO] [stdout] e3d3fd46b32ec7438e1627289fb3bc7c39d2d14ca7b1a1ab8f67e3294e4d7f6f
[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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 628320a31cfd23b7beb9a13bbbb86bb8b40e3e7006c52a2c7df2e036a608530e
[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" "628320a31cfd23b7beb9a13bbbb86bb8b40e3e7006c52a2c7df2e036a608530e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling libc v0.2.70
[INFO] [stderr]    Compiling syn v1.0.30
[INFO] [stderr]    Compiling serde v1.0.111
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]    Compiling quote v1.0.6
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling serde_derive v1.0.111
[INFO] [stderr]     Checking serde_json v1.0.53
[INFO] [stderr]     Checking tictactoe v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: constant is never used: `STRATEGY_FOLDER`
[INFO] [stdout]   --> src/players.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | const STRATEGY_FOLDER: &str  = r"player_strategy";
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ComputerLearner`
[INFO] [stdout]   --> src/players.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     ComputerLearner(ComputerLearner)
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/players.rs:164:12
[INFO] [stdout]     |
[INFO] [stdout] 164 |     pub fn new(is_learning: bool) -> ComputerLearner {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `save`
[INFO] [stdout]    --> src/players.rs:172:12
[INFO] [stdout]     |
[INFO] [stdout] 172 |     pub fn save(&self, filename: &str) {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `load`
[INFO] [stdout]    --> src/players.rs:178:12
[INFO] [stdout]     |
[INFO] [stdout] 178 |     pub fn load(filename: &str, is_learning: bool) -> ComputerLearner {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_strategy_file_path`
[INFO] [stdout]    --> src/players.rs:187:8
[INFO] [stdout]     |
[INFO] [stdout] 187 |     fn get_strategy_file_path(filename: &str) -> PathBuf {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `save_with_relative_path`
[INFO] [stdout]   --> src/utilities.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub fn save_with_relative_path(object: &impl Serialize, file: PathBuf) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `open_with_relative_path`
[INFO] [stdout]   --> src/utilities.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn open_with_relative_path<T>(file: PathBuf) -> T 
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/utilities.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     file.write_all(string.as_bytes()); // as bytes converts it to byte array
[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: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `STRATEGY_FOLDER`
[INFO] [stdout]   --> src/players.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | const STRATEGY_FOLDER: &str  = r"player_strategy";
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ComputerLearner`
[INFO] [stdout]   --> src/players.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     ComputerLearner(ComputerLearner)
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/players.rs:164:12
[INFO] [stdout]     |
[INFO] [stdout] 164 |     pub fn new(is_learning: bool) -> ComputerLearner {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `save`
[INFO] [stdout]    --> src/players.rs:172:12
[INFO] [stdout]     |
[INFO] [stdout] 172 |     pub fn save(&self, filename: &str) {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `load`
[INFO] [stdout]    --> src/players.rs:178:12
[INFO] [stdout]     |
[INFO] [stdout] 178 |     pub fn load(filename: &str, is_learning: bool) -> ComputerLearner {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_strategy_file_path`
[INFO] [stdout]    --> src/players.rs:187:8
[INFO] [stdout]     |
[INFO] [stdout] 187 |     fn get_strategy_file_path(filename: &str) -> PathBuf {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `save_with_relative_path`
[INFO] [stdout]   --> src/utilities.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub fn save_with_relative_path(object: &impl Serialize, file: PathBuf) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `open_with_relative_path`
[INFO] [stdout]   --> src/utilities.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn open_with_relative_path<T>(file: PathBuf) -> T 
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/utilities.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     file.write_all(string.as_bytes()); // as bytes converts it to byte array
[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: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 40.55s
[INFO] running `Command { std: "docker" "inspect" "628320a31cfd23b7beb9a13bbbb86bb8b40e3e7006c52a2c7df2e036a608530e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "628320a31cfd23b7beb9a13bbbb86bb8b40e3e7006c52a2c7df2e036a608530e", kill_on_drop: false }`
[INFO] [stdout] 628320a31cfd23b7beb9a13bbbb86bb8b40e3e7006c52a2c7df2e036a608530e