[INFO] updating cached repository https://github.com/QuarkNerd/Rust_Noughts_-_Crosses
[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] d5e89f3bc297364dc109476b24d58ef1e83cca03
[INFO] testing QuarkNerd/Rust_Noughts_-_Crosses against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FQuarkNerd%2FRust_Noughts_-_Crosses" "/workspace/builds/worker-13/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/QuarkNerd/Rust_Noughts_-_Crosses on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-13/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 `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=warn" "-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" "+1.44.0" "build" "--frozen"`
[INFO] [stdout] 50a97f5e06f9437a1d4ff8206879f7997f615abbe1980d4fc3db2690d55912c8
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "50a97f5e06f9437a1d4ff8206879f7997f615abbe1980d4fc3db2690d55912c8"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling tictactoe v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: struct is never constructed: `GameStep`
[INFO] [stderr]   --> src/players.rs:49:8
[INFO] [stderr]    |
[INFO] [stderr] 49 | struct GameStep {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Strategy`
[INFO] [stderr]   --> src/players.rs:54:8
[INFO] [stderr]    |
[INFO] [stderr] 54 | struct Strategy {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from`
[INFO] [stderr]   --> src/players.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     pub fn from(moves: Vec<String>, weights: Vec<u64>) -> Strategy {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `weighted_pick`
[INFO] [stderr]   --> src/players.rs:67:5
[INFO] [stderr]    |
[INFO] [stderr] 67 |     pub fn weighted_pick(&self) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `update_weight`
[INFO] [stderr]   --> src/players.rs:73:5
[INFO] [stderr]    |
[INFO] [stderr] 73 |     pub fn update_weight(&mut self, move_string: String, change: i64 ) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `ComputerLearner`
[INFO] [stderr]   --> src/players.rs:95:12
[INFO] [stderr]    |
[INFO] [stderr] 95 | pub struct ComputerLearner {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/players.rs:101:5
[INFO] [stderr]     |
[INFO] [stderr] 101 |     pub fn new() -> ComputerLearner {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.58s
[INFO] running `"docker" "inspect" "50a97f5e06f9437a1d4ff8206879f7997f615abbe1980d4fc3db2690d55912c8"`
[INFO] running `"docker" "rm" "-f" "50a97f5e06f9437a1d4ff8206879f7997f615abbe1980d4fc3db2690d55912c8"`
[INFO] [stdout] 50a97f5e06f9437a1d4ff8206879f7997f615abbe1980d4fc3db2690d55912c8
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=warn" "-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" "+1.44.0" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d485198b573e05be4eaa1b5f99b73054a5a8605026d45f1ae40ba2e22caec5eb
[INFO] running `"docker" "start" "-a" "d485198b573e05be4eaa1b5f99b73054a5a8605026d45f1ae40ba2e22caec5eb"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling tictactoe v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: struct is never constructed: `GameStep`
[INFO] [stderr]   --> src/players.rs:49:8
[INFO] [stderr]    |
[INFO] [stderr] 49 | struct GameStep {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Strategy`
[INFO] [stderr]   --> src/players.rs:54:8
[INFO] [stderr]    |
[INFO] [stderr] 54 | struct Strategy {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from`
[INFO] [stderr]   --> src/players.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     pub fn from(moves: Vec<String>, weights: Vec<u64>) -> Strategy {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `weighted_pick`
[INFO] [stderr]   --> src/players.rs:67:5
[INFO] [stderr]    |
[INFO] [stderr] 67 |     pub fn weighted_pick(&self) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `update_weight`
[INFO] [stderr]   --> src/players.rs:73:5
[INFO] [stderr]    |
[INFO] [stderr] 73 |     pub fn update_weight(&mut self, move_string: String, change: i64 ) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `ComputerLearner`
[INFO] [stderr]   --> src/players.rs:95:12
[INFO] [stderr]    |
[INFO] [stderr] 95 | pub struct ComputerLearner {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/players.rs:101:5
[INFO] [stderr]     |
[INFO] [stderr] 101 |     pub fn new() -> ComputerLearner {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `GameStep`
[INFO] [stderr]   --> src/players.rs:49:8
[INFO] [stderr]    |
[INFO] [stderr] 49 | struct GameStep {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Strategy`
[INFO] [stderr]   --> src/players.rs:54:8
[INFO] [stderr]    |
[INFO] [stderr] 54 | struct Strategy {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from`
[INFO] [stderr]   --> src/players.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     pub fn from(moves: Vec<String>, weights: Vec<u64>) -> Strategy {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `weighted_pick`
[INFO] [stderr]   --> src/players.rs:67:5
[INFO] [stderr]    |
[INFO] [stderr] 67 |     pub fn weighted_pick(&self) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `update_weight`
[INFO] [stderr]   --> src/players.rs:73:5
[INFO] [stderr]    |
[INFO] [stderr] 73 |     pub fn update_weight(&mut self, move_string: String, change: i64 ) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `ComputerLearner`
[INFO] [stderr]   --> src/players.rs:95:12
[INFO] [stderr]    |
[INFO] [stderr] 95 | pub struct ComputerLearner {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/players.rs:101:5
[INFO] [stderr]     |
[INFO] [stderr] 101 |     pub fn new() -> ComputerLearner {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.27s
[INFO] running `"docker" "inspect" "d485198b573e05be4eaa1b5f99b73054a5a8605026d45f1ae40ba2e22caec5eb"`
[INFO] running `"docker" "rm" "-f" "d485198b573e05be4eaa1b5f99b73054a5a8605026d45f1ae40ba2e22caec5eb"`
[INFO] [stdout] d485198b573e05be4eaa1b5f99b73054a5a8605026d45f1ae40ba2e22caec5eb
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=warn" "-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" "+1.44.0" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] cd4fcd4c5cf6143d136438c34d63f6b77ead09241fa41fbcf6a7e6e0b6781d93
[INFO] running `"docker" "start" "-a" "cd4fcd4c5cf6143d136438c34d63f6b77ead09241fa41fbcf6a7e6e0b6781d93"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: struct is never constructed: `GameStep`
[INFO] [stderr]   --> src/players.rs:49:8
[INFO] [stderr]    |
[INFO] [stderr] 49 | struct GameStep {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Strategy`
[INFO] [stderr]   --> src/players.rs:54:8
[INFO] [stderr]    |
[INFO] [stderr] 54 | struct Strategy {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from`
[INFO] [stderr]   --> src/players.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     pub fn from(moves: Vec<String>, weights: Vec<u64>) -> Strategy {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `weighted_pick`
[INFO] [stderr]   --> src/players.rs:67:5
[INFO] [stderr]    |
[INFO] [stderr] 67 |     pub fn weighted_pick(&self) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `update_weight`
[INFO] [stderr]   --> src/players.rs:73:5
[INFO] [stderr]    |
[INFO] [stderr] 73 |     pub fn update_weight(&mut self, move_string: String, change: i64 ) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `ComputerLearner`
[INFO] [stderr]   --> src/players.rs:95:12
[INFO] [stderr]    |
[INFO] [stderr] 95 | pub struct ComputerLearner {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/players.rs:101:5
[INFO] [stderr]     |
[INFO] [stderr] 101 |     pub fn new() -> ComputerLearner {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `GameStep`
[INFO] [stderr]   --> src/players.rs:49:8
[INFO] [stderr]    |
[INFO] [stderr] 49 | struct GameStep {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Strategy`
[INFO] [stderr]   --> src/players.rs:54:8
[INFO] [stderr]    |
[INFO] [stderr] 54 | struct Strategy {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from`
[INFO] [stderr]   --> src/players.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     pub fn from(moves: Vec<String>, weights: Vec<u64>) -> Strategy {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `weighted_pick`
[INFO] [stderr]   --> src/players.rs:67:5
[INFO] [stderr]    |
[INFO] [stderr] 67 |     pub fn weighted_pick(&self) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `update_weight`
[INFO] [stderr]   --> src/players.rs:73:5
[INFO] [stderr]    |
[INFO] [stderr] 73 |     pub fn update_weight(&mut self, move_string: String, change: i64 ) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `ComputerLearner`
[INFO] [stderr]   --> src/players.rs:95:12
[INFO] [stderr]    |
[INFO] [stderr] 95 | pub struct ComputerLearner {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/players.rs:101:5
[INFO] [stderr]     |
[INFO] [stderr] 101 |     pub fn new() -> ComputerLearner {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.17s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/tictactoe-42a077638ed75db2
[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] [stderr]      Running /opt/rustwide/target/debug/deps/tictactoe-ee221a2113e64ef1
[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] [stderr]    Doc-tests tictactoe
[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" "cd4fcd4c5cf6143d136438c34d63f6b77ead09241fa41fbcf6a7e6e0b6781d93"`
[INFO] running `"docker" "rm" "-f" "cd4fcd4c5cf6143d136438c34d63f6b77ead09241fa41fbcf6a7e6e0b6781d93"`
[INFO] [stdout] cd4fcd4c5cf6143d136438c34d63f6b77ead09241fa41fbcf6a7e6e0b6781d93