[INFO] cloning repository https://github.com/lklacar/rust-tic-tac-toe-ai
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lklacar/rust-tic-tac-toe-ai" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flklacar%2Frust-tic-tac-toe-ai", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flklacar%2Frust-tic-tac-toe-ai'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4071d4f333eaf0b602d2deaa041e398bf8e3f014
[INFO] testing lklacar/rust-tic-tac-toe-ai against beta-2021-01-01 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flklacar%2Frust-tic-tac-toe-ai" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lklacar/rust-tic-tac-toe-ai on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/lklacar/rust-tic-tac-toe-ai
[INFO] finished tweaking git repo https://github.com/lklacar/rust-tic-tac-toe-ai
[INFO] tweaked toml for git repo https://github.com/lklacar/rust-tic-tac-toe-ai written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/lklacar/rust-tic-tac-toe-ai already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b5b296ef6a5af7c7d99cba3f5ba329c17ce70df17bd221d3ae85f8846d727b8a
[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" "b5b296ef6a5af7c7d99cba3f5ba329c17ce70df17bd221d3ae85f8846d727b8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b5b296ef6a5af7c7d99cba3f5ba329c17ce70df17bd221d3ae85f8846d727b8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5b296ef6a5af7c7d99cba3f5ba329c17ce70df17bd221d3ae85f8846d727b8a", kill_on_drop: false }`
[INFO] [stdout] b5b296ef6a5af7c7d99cba3f5ba329c17ce70df17bd221d3ae85f8846d727b8a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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=warn" "-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" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e7c4c08265bd3c259906cbf0d338e9c70dbf767e31d0e18198fe3051b75ac060
[INFO] running `Command { std: "docker" "start" "-a" "e7c4c08265bd3c259906cbf0d338e9c70dbf767e31d0e18198fe3051b75ac060", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-tic-tac-toe-ai v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/board.rs:10:16
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn new(size: u32) -> Board {
[INFO] [stdout]    |                ^^^^ help: if this is intentional, prefix it with an underscore: `_size`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cell`
[INFO] [stdout]   --> src/board.rs:51:13
[INFO] [stdout]    |
[INFO] [stdout] 51 |         let mut cell = match option_cell {
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_cell`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/board.rs:51:13
[INFO] [stdout]    |
[INFO] [stdout] 51 |         let mut cell = match option_cell {
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/board.rs:74:21
[INFO] [stdout]    |
[INFO] [stdout] 74 |                 let mut cell = match option_cell {
[INFO] [stdout]    |                     ----^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `empty_cells`
[INFO] [stdout]   --> src/board.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn empty_cells(&self) -> Vec<&cell::Cell> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `O`
[INFO] [stdout]  --> src/cell.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     O,
[INFO] [stdout]   |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.07s
[INFO] running `Command { std: "docker" "inspect" "e7c4c08265bd3c259906cbf0d338e9c70dbf767e31d0e18198fe3051b75ac060", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7c4c08265bd3c259906cbf0d338e9c70dbf767e31d0e18198fe3051b75ac060", kill_on_drop: false }`
[INFO] [stdout] e7c4c08265bd3c259906cbf0d338e9c70dbf767e31d0e18198fe3051b75ac060
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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=warn" "-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" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6e26c0dac1852693ece0ab59ac11e8336f669ada9909421ca57517e1cee76116
[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" "6e26c0dac1852693ece0ab59ac11e8336f669ada9909421ca57517e1cee76116", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-tic-tac-toe-ai v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/board.rs:10:16
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn new(size: u32) -> Board {
[INFO] [stdout]    |                ^^^^ help: if this is intentional, prefix it with an underscore: `_size`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cell`
[INFO] [stdout]   --> src/board.rs:51:13
[INFO] [stdout]    |
[INFO] [stdout] 51 |         let mut cell = match option_cell {
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_cell`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/board.rs:51:13
[INFO] [stdout]    |
[INFO] [stdout] 51 |         let mut cell = match option_cell {
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/board.rs:74:21
[INFO] [stdout]    |
[INFO] [stdout] 74 |                 let mut cell = match option_cell {
[INFO] [stdout]    |                     ----^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `empty_cells`
[INFO] [stdout]   --> src/board.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn empty_cells(&self) -> Vec<&cell::Cell> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `O`
[INFO] [stdout]  --> src/cell.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     O,
[INFO] [stdout]   |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.92s
[INFO] running `Command { std: "docker" "inspect" "6e26c0dac1852693ece0ab59ac11e8336f669ada9909421ca57517e1cee76116", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e26c0dac1852693ece0ab59ac11e8336f669ada9909421ca57517e1cee76116", kill_on_drop: false }`
[INFO] [stdout] 6e26c0dac1852693ece0ab59ac11e8336f669ada9909421ca57517e1cee76116
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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=warn" "-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" "+beta-2021-01-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a50384b57ca7a1880e28043cd053166a09f13258e48c871be63a8174f90c2747
[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" "a50384b57ca7a1880e28043cd053166a09f13258e48c871be63a8174f90c2747", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `size`
[INFO] [stderr]   --> src/board.rs:10:16
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub fn new(size: u32) -> Board {
[INFO] [stderr]    |                ^^^^ help: if this is intentional, prefix it with an underscore: `_size`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `cell`
[INFO] [stderr]   --> src/board.rs:51:13
[INFO] [stderr]    |
[INFO] [stderr] 51 |         let mut cell = match option_cell {
[INFO] [stderr]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_cell`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/board.rs:51:13
[INFO] [stderr]    |
[INFO] [stderr] 51 |         let mut cell = match option_cell {
[INFO] [stderr]    |             ----^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/board.rs:74:21
[INFO] [stderr]    |
[INFO] [stderr] 74 |                 let mut cell = match option_cell {
[INFO] [stderr]    |                     ----^^^^
[INFO] [stderr]    |                     |
[INFO] [stderr]    |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `empty_cells`
[INFO] [stderr]   --> src/board.rs:24:12
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn empty_cells(&self) -> Vec<&cell::Cell> {
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `O`
[INFO] [stderr]  --> src/cell.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     O,
[INFO] [stderr]   |     ^
[INFO] [stderr] 
[INFO] [stderr] warning: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rust_tic_tac_toe_ai-ad02b2d872854c99
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a50384b57ca7a1880e28043cd053166a09f13258e48c871be63a8174f90c2747", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a50384b57ca7a1880e28043cd053166a09f13258e48c871be63a8174f90c2747", kill_on_drop: false }`
[INFO] [stdout] a50384b57ca7a1880e28043cd053166a09f13258e48c871be63a8174f90c2747