[INFO] updating cached repository https://github.com/yogaxpto/tic-tac-rust
[INFO] running `"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"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 38743e1ff8560eaf634d3f633cd8c644c9feafca
[INFO] checking yogaxpto/tic-tac-rust against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyogaxpto%2Ftic-tac-rust" "/workspace/builds/worker-11/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yogaxpto/tic-tac-rust on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/yogaxpto/tic-tac-rust
[INFO] finished tweaking git repo https://github.com/yogaxpto/tic-tac-rust
[INFO] tweaked toml for git repo https://github.com/yogaxpto/tic-tac-rust written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/yogaxpto/tic-tac-rust already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "/opt/rustwide/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b2427fa88812d91b07b133b1e4b7bcafde9f5d53d51e3ee3d78d829575ceb578
[INFO] running `"docker" "start" "-a" "b2427fa88812d91b07b133b1e4b7bcafde9f5d53d51e3ee3d78d829575ceb578"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Checking tic-tac-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable `turn` is assigned to, but never used
[INFO] [stderr]    --> src/main.rs:192:9
[INFO] [stderr]     |
[INFO] [stderr] 192 |     let mut turn: Turn = Turn::Player;
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr]     = note: consider using `_turn` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `bot_symbol`
[INFO] [stderr]    --> src/main.rs:204:9
[INFO] [stderr]     |
[INFO] [stderr] 204 |     let bot_symbol: State = State::opponent_symbol(player_symbol);
[INFO] [stderr]     |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_bot_symbol`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `turn` is never read
[INFO] [stderr]    --> src/main.rs:211:20
[INFO] [stderr]     |
[INFO] [stderr] 211 |             '0' => turn = Turn::Player,
[INFO] [stderr]     |                    ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `turn` is never read
[INFO] [stderr]    --> src/main.rs:212:20
[INFO] [stderr]     |
[INFO] [stderr] 212 |             '1' => turn = Turn::Bot,
[INFO] [stderr]     |                    ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `strategy`
[INFO] [stderr]    --> src/main.rs:170:28
[INFO] [stderr]     |
[INFO] [stderr] 170 |     pub fn bot_play(&self, strategy: Strategy) {
[INFO] [stderr]     |                            ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_strategy`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `child`
[INFO] [stderr]    --> src/main.rs:112:5
[INFO] [stderr]     |
[INFO] [stderr] 112 |     pub fn child(&mut self, symbol: State, row: usize, col: usize, player: State) -> Node {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:184:5
[INFO] [stderr]     |
[INFO] [stderr] 184 |     io.lock().read_line(&mut stdin);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: variable `turn` is assigned to, but never used
[INFO] [stderr]    --> src/main.rs:192:9
[INFO] [stderr]     |
[INFO] [stderr] 192 |     let mut turn: Turn = Turn::Player;
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr]     = note: consider using `_turn` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `bot_symbol`
[INFO] [stderr]    --> src/main.rs:204:9
[INFO] [stderr]     |
[INFO] [stderr] 204 |     let bot_symbol: State = State::opponent_symbol(player_symbol);
[INFO] [stderr]     |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_bot_symbol`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `turn` is never read
[INFO] [stderr]    --> src/main.rs:211:20
[INFO] [stderr]     |
[INFO] [stderr] 211 |             '0' => turn = Turn::Player,
[INFO] [stderr]     |                    ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `turn` is never read
[INFO] [stderr]    --> src/main.rs:212:20
[INFO] [stderr]     |
[INFO] [stderr] 212 |             '1' => turn = Turn::Bot,
[INFO] [stderr]     |                    ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `strategy`
[INFO] [stderr]    --> src/main.rs:170:28
[INFO] [stderr]     |
[INFO] [stderr] 170 |     pub fn bot_play(&self, strategy: Strategy) {
[INFO] [stderr]     |                            ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_strategy`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `child`
[INFO] [stderr]    --> src/main.rs:112:5
[INFO] [stderr]     |
[INFO] [stderr] 112 |     pub fn child(&mut self, symbol: State, row: usize, col: usize, player: State) -> Node {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:184:5
[INFO] [stderr]     |
[INFO] [stderr] 184 |     io.lock().read_line(&mut stdin);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.62s
[INFO] running `"docker" "inspect" "b2427fa88812d91b07b133b1e4b7bcafde9f5d53d51e3ee3d78d829575ceb578"`
[INFO] running `"docker" "rm" "-f" "b2427fa88812d91b07b133b1e4b7bcafde9f5d53d51e3ee3d78d829575ceb578"`
[INFO] [stdout] b2427fa88812d91b07b133b1e4b7bcafde9f5d53d51e3ee3d78d829575ceb578