[INFO] updating cached repository https://github.com/pr95/reversi
[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] c1a43bbd5a4fba4fbcd80aa73db8f144d34e65f2
[INFO] checking pr95/reversi against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpr95%2Freversi" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pr95/reversi 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/pr95/reversi
[INFO] finished tweaking git repo https://github.com/pr95/reversi
[INFO] tweaked toml for git repo https://github.com/pr95/reversi written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/pr95/reversi 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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 92e50a80f16663375c0a33f0797b148edbf638722e2d66102a1306c24f1bc2e3
[INFO] running `"docker" "start" "-a" "92e50a80f16663375c0a33f0797b148edbf638722e2d66102a1306c24f1bc2e3"`
[INFO] [stderr]     Checking reversi v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:179:9
[INFO] [stderr]     |
[INFO] [stderr] 179 |     let mut field = [[0; SIZE_X]; SIZE_Y];
[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: function is never used: `winner`
[INFO] [stderr]   --> src/main.rs:30:4
[INFO] [stderr]    |
[INFO] [stderr] 30 | fn winner(field: &[[i32; SIZE_X];SIZE_Y]) -> i32 {
[INFO] [stderr]    |    ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `check_valid_boundaries`
[INFO] [stderr]   --> src/main.rs:53:4
[INFO] [stderr]    |
[INFO] [stderr] 53 | fn check_valid_boundaries(rev_x: i32, rev_y: i32) -> bool {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `valid_turn`
[INFO] [stderr]   --> src/main.rs:66:4
[INFO] [stderr]    |
[INFO] [stderr] 66 | fn valid_turn(field: &[[i32; SIZE_X];SIZE_Y], player: i32, x_koord: usize, y_koord: usize) -> bool {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `execute_turn`
[INFO] [stderr]    --> src/main.rs:111:4
[INFO] [stderr]     |
[INFO] [stderr] 111 | fn execute_turn(field: &mut [[i32; SIZE_X];SIZE_Y], player :i32, x_koord: usize, y_koord: usize) -> &mut [[i32; SIZE_X];SIZE_Y] {
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `possible_turns`
[INFO] [stderr]    --> src/main.rs:152:4
[INFO] [stderr]     |
[INFO] [stderr] 152 | fn possible_turns(field: &[[i32; SIZE_X];SIZE_Y], player: i32) -> i32 {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `test_field` is never read
[INFO] [stderr]   --> src/test.rs:15:13
[INFO] [stderr]    |
[INFO] [stderr] 15 |         let mut test_field = [[0; SIZE_X];SIZE_Y];
[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 `test_field` is never read
[INFO] [stderr]   --> src/test.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 |         let mut test_field = [[0; SIZE_X];SIZE_Y];
[INFO] [stderr]    |             ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `test_field` is never read
[INFO] [stderr]   --> src/test.rs:43:13
[INFO] [stderr]    |
[INFO] [stderr] 43 |         let mut test_field = [[0; SIZE_X];SIZE_Y];
[INFO] [stderr]    |             ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:179:9
[INFO] [stderr]     |
[INFO] [stderr] 179 |     let mut field = [[0; SIZE_X]; SIZE_Y];
[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: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `check_valid_boundaries`
[INFO] [stderr]   --> src/main.rs:53:4
[INFO] [stderr]    |
[INFO] [stderr] 53 | fn check_valid_boundaries(rev_x: i32, rev_y: i32) -> bool {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `valid_turn`
[INFO] [stderr]   --> src/main.rs:66:4
[INFO] [stderr]    |
[INFO] [stderr] 66 | fn valid_turn(field: &[[i32; SIZE_X];SIZE_Y], player: i32, x_koord: usize, y_koord: usize) -> bool {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `execute_turn`
[INFO] [stderr]    --> src/main.rs:111:4
[INFO] [stderr]     |
[INFO] [stderr] 111 | fn execute_turn(field: &mut [[i32; SIZE_X];SIZE_Y], player :i32, x_koord: usize, y_koord: usize) -> &mut [[i32; SIZE_X];SIZE_Y] {
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `possible_turns`
[INFO] [stderr]    --> src/main.rs:152:4
[INFO] [stderr]     |
[INFO] [stderr] 152 | fn possible_turns(field: &[[i32; SIZE_X];SIZE_Y], player: i32) -> i32 {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.68s
[INFO] running `"docker" "inspect" "92e50a80f16663375c0a33f0797b148edbf638722e2d66102a1306c24f1bc2e3"`
[INFO] running `"docker" "rm" "-f" "92e50a80f16663375c0a33f0797b148edbf638722e2d66102a1306c24f1bc2e3"`
[INFO] [stdout] 92e50a80f16663375c0a33f0797b148edbf638722e2d66102a1306c24f1bc2e3