[INFO] updating cached repository ssttevee/rust-mcts-connect-four
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ssttevee/rust-mcts-connect-four
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ssttevee/rust-mcts-connect-four" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/ssttevee/rust-mcts-connect-four"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/ssttevee/rust-mcts-connect-four'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ssttevee/rust-mcts-connect-four" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/ssttevee/rust-mcts-connect-four"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/ssttevee/rust-mcts-connect-four'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1a7b0f79c448ea234067fc56ec3e70a333317b33
[INFO] sha for GitHub repo ssttevee/rust-mcts-connect-four: 1a7b0f79c448ea234067fc56ec3e70a333317b33
[INFO] validating manifest of ssttevee/rust-mcts-connect-four on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ssttevee/rust-mcts-connect-four on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing ssttevee/rust-mcts-connect-four
[INFO] finished frobbing ssttevee/rust-mcts-connect-four
[INFO] frobbed toml for ssttevee/rust-mcts-connect-four written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/ssttevee/rust-mcts-connect-four/Cargo.toml
[INFO] started frobbing ssttevee/rust-mcts-connect-four
[INFO] finished frobbing ssttevee/rust-mcts-connect-four
[INFO] frobbed toml for ssttevee/rust-mcts-connect-four written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/ssttevee/rust-mcts-connect-four/Cargo.toml
[INFO] crate ssttevee/rust-mcts-connect-four already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking ssttevee/rust-mcts-connect-four against master#60960a260f7b5c695fd0717311d72ce62dd4eb43 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-2/master#60960a260f7b5c695fd0717311d72ce62dd4eb43:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/ssttevee/rust-mcts-connect-four:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 7378cf6ccd6a64864bdb2442d835cf061ef3ee125c3abf6cef1383114dd7578e
[INFO] running `"docker" "start" "-a" "7378cf6ccd6a64864bdb2442d835cf061ef3ee125c3abf6cef1383114dd7578e"`
[INFO] [stderr] warning: file found to be present in multiple build targets: /opt/crater/workdir/src/main.rs
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rand_chacha v0.2.0
[INFO] [stderr]     Checking getrandom v0.1.6
[INFO] [stderr]     Checking termion v1.5.3
[INFO] [stderr]     Checking rand_core v0.5.0
[INFO] [stderr]     Checking rand v0.7.0
[INFO] [stderr]     Checking connect-4 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: struct is never constructed: `Done`
[INFO] [stderr]   --> src/cli.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | struct Done;
[INFO] [stderr]    | ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `player_move`
[INFO] [stderr]   --> src/cli.rs:22:1
[INFO] [stderr]    |
[INFO] [stderr] 22 | fn player_move<F: Fn(&Game) -> ()>(game: &mut Game, input: &mut io::Lines<io::StdinLock<'_>>, print_board: F) -> Result<(usize, usize), Done> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `mcts_move`
[INFO] [stderr]   --> src/cli.rs:83:1
[INFO] [stderr]    |
[INFO] [stderr] 83 | fn mcts_move(game: &mut Game, mcts: &MCTS) -> (usize, usize) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_board_top`
[INFO] [stderr]    --> src/cli.rs:109:1
[INFO] [stderr]     |
[INFO] [stderr] 109 | fn print_board_top(cols: usize) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_board`
[INFO] [stderr]    --> src/cli.rs:113:1
[INFO] [stderr]     |
[INFO] [stderr] 113 | fn print_board(game: &Game, last_move: Option<(usize, usize)>) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `start`
[INFO] [stderr]    --> src/cli.rs:123:1
[INFO] [stderr]     |
[INFO] [stderr] 123 | pub fn start() {
[INFO] [stderr]     | ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `main`
[INFO] [stderr]   --> src/main.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | fn main() {
[INFO] [stderr]    | ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.41s
[INFO] running `"docker" "inspect" "7378cf6ccd6a64864bdb2442d835cf061ef3ee125c3abf6cef1383114dd7578e"`
[INFO] running `"docker" "rm" "-f" "7378cf6ccd6a64864bdb2442d835cf061ef3ee125c3abf6cef1383114dd7578e"`
[INFO] [stdout] 7378cf6ccd6a64864bdb2442d835cf061ef3ee125c3abf6cef1383114dd7578e