[INFO] fetching crate reversi 0.1.0... [INFO] testing reversi-0.1.0 against try#2440211fe03bc45c89b6dc1a3df18382ce91e32b for pr-146098-1 [INFO] extracting crate reversi 0.1.0 into /workspace/builds/worker-0-tc2/source [INFO] started tweaking crates.io crate reversi 0.1.0 [INFO] finished tweaking crates.io crate reversi 0.1.0 [INFO] tweaked toml for crates.io crate reversi 0.1.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate reversi 0.1.0 on toolchain 2440211fe03bc45c89b6dc1a3df18382ce91e32b [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate crates.io crate reversi 0.1.0 already has a lockfile, it will not be regenerated [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 2b8c6d33e8740b4a681943c4b1a38ba432cf06bbf23119f26930fa4c26266be7 [INFO] running `Command { std: "docker" "start" "-a" "2b8c6d33e8740b4a681943c4b1a38ba432cf06bbf23119f26930fa4c26266be7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "2b8c6d33e8740b4a681943c4b1a38ba432cf06bbf23119f26930fa4c26266be7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "2b8c6d33e8740b4a681943c4b1a38ba432cf06bbf23119f26930fa4c26266be7", kill_on_drop: false }` [INFO] [stdout] 2b8c6d33e8740b4a681943c4b1a38ba432cf06bbf23119f26930fa4c26266be7 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 1889773af258e9e4b72f7c610593119bde60b0fb373714fad3402be22efc24b4 [INFO] running `Command { std: "docker" "start" "-a" "1889773af258e9e4b72f7c610593119bde60b0fb373714fad3402be22efc24b4", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.73 [INFO] [stderr] Compiling autocfg v1.0.0 [INFO] [stderr] Compiling getrandom v0.1.14 [INFO] [stderr] Compiling memchr v2.3.3 [INFO] [stderr] Compiling cfg-if v0.1.10 [INFO] [stderr] Compiling ppv-lite86 v0.2.8 [INFO] [stderr] Compiling regex-syntax v0.6.18 [INFO] [stderr] Compiling ansi_term v0.12.1 [INFO] [stderr] Compiling thread_local v1.0.1 [INFO] [stderr] Compiling hashbrown v0.8.1 [INFO] [stderr] Compiling indexmap v1.5.0 [INFO] [stderr] Compiling aho-corasick v0.7.13 [INFO] [stderr] Compiling rand v0.4.6 [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 rand v0.3.23 [INFO] [stderr] Compiling libmath v0.2.1 [INFO] [stderr] Compiling regex v1.3.9 [INFO] [stderr] Compiling reversi v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `debug` [INFO] [stdout] --> src/main.rs:128:21 [INFO] [stdout] | [INFO] [stdout] 128 | fn print(&self, debug: bool) { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_debug` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `u` is never read [INFO] [stdout] --> src/main.rs:181:17 [INFO] [stdout] | [INFO] [stdout] 181 | let mut u: u8 = 1; [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `u` is never read [INFO] [stdout] --> src/main.rs:320:17 [INFO] [stdout] | [INFO] [stdout] 320 | let mut u: u8 = 1; // used as the iter for get_new_pos() [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `prev_player_score` [INFO] [stdout] --> src/main.rs:841:10 [INFO] [stdout] | [INFO] [stdout] 841 | let (prev_player_score, prev_cpu_score): (u8, u8) = b.get_score(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] help: if this is intentional, prefix it with an underscore [INFO] [stdout] | [INFO] [stdout] 841 | let (_prev_player_score, prev_cpu_score): (u8, u8) = b.get_score(); [INFO] [stdout] | + [INFO] [stdout] help: you might have meant to pattern match on the similarly named constant `HEIGHT` [INFO] [stdout] | [INFO] [stdout] 841 - let (prev_player_score, prev_cpu_score): (u8, u8) = b.get_score(); [INFO] [stdout] 841 + let (main::HEIGHT, prev_cpu_score): (u8, u8) = b.get_score(); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `player_score` [INFO] [stdout] --> src/main.rs:857:14 [INFO] [stdout] | [INFO] [stdout] 857 | let (player_score, cpu_score): (u8, u8) = new_board.get_score(); [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] help: if this is intentional, prefix it with an underscore [INFO] [stdout] | [INFO] [stdout] 857 | let (_player_score, cpu_score): (u8, u8) = new_board.get_score(); [INFO] [stdout] | + [INFO] [stdout] help: you might have meant to pattern match on the similarly named constant `HEIGHT` [INFO] [stdout] | [INFO] [stdout] 857 - let (player_score, cpu_score): (u8, u8) = new_board.get_score(); [INFO] [stdout] 857 + let (main::HEIGHT, cpu_score): (u8, u8) = new_board.get_score(); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `difficulty` [INFO] [stdout] --> src/main.rs:886:13 [INFO] [stdout] | [INFO] [stdout] 886 | let difficulty: String = match cpu_diff.trim().to_string().as_str() { [INFO] [stdout] | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_difficulty` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:715:34 [INFO] [stdout] | [INFO] [stdout] 715 | if !debug { print!("."); stdout().flush(); } [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 715 | if !debug { print!("."); let _ = stdout().flush(); } [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.75s [INFO] running `Command { std: "docker" "inspect" "1889773af258e9e4b72f7c610593119bde60b0fb373714fad3402be22efc24b4", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "1889773af258e9e4b72f7c610593119bde60b0fb373714fad3402be22efc24b4", kill_on_drop: false }` [INFO] [stdout] 1889773af258e9e4b72f7c610593119bde60b0fb373714fad3402be22efc24b4 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 915db6d4aa6566f0a66cce402e677d1fa29571304c11cfb1f15b01c2b0b0d5e9 [INFO] running `Command { std: "docker" "start" "-a" "915db6d4aa6566f0a66cce402e677d1fa29571304c11cfb1f15b01c2b0b0d5e9", kill_on_drop: false }` [INFO] [stderr] Compiling reversi v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `debug` [INFO] [stdout] --> src/main.rs:128:21 [INFO] [stdout] | [INFO] [stdout] 128 | fn print(&self, debug: bool) { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_debug` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `u` is never read [INFO] [stdout] --> src/main.rs:181:17 [INFO] [stdout] | [INFO] [stdout] 181 | let mut u: u8 = 1; [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `u` is never read [INFO] [stdout] --> src/main.rs:320:17 [INFO] [stdout] | [INFO] [stdout] 320 | let mut u: u8 = 1; // used as the iter for get_new_pos() [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `prev_player_score` [INFO] [stdout] --> src/main.rs:841:10 [INFO] [stdout] | [INFO] [stdout] 841 | let (prev_player_score, prev_cpu_score): (u8, u8) = b.get_score(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] help: if this is intentional, prefix it with an underscore [INFO] [stdout] | [INFO] [stdout] 841 | let (_prev_player_score, prev_cpu_score): (u8, u8) = b.get_score(); [INFO] [stdout] | + [INFO] [stdout] help: you might have meant to pattern match on the similarly named constant `HEIGHT` [INFO] [stdout] | [INFO] [stdout] 841 - let (prev_player_score, prev_cpu_score): (u8, u8) = b.get_score(); [INFO] [stdout] 841 + let (main::HEIGHT, prev_cpu_score): (u8, u8) = b.get_score(); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `player_score` [INFO] [stdout] --> src/main.rs:857:14 [INFO] [stdout] | [INFO] [stdout] 857 | let (player_score, cpu_score): (u8, u8) = new_board.get_score(); [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] help: if this is intentional, prefix it with an underscore [INFO] [stdout] | [INFO] [stdout] 857 | let (_player_score, cpu_score): (u8, u8) = new_board.get_score(); [INFO] [stdout] | + [INFO] [stdout] help: you might have meant to pattern match on the similarly named constant `HEIGHT` [INFO] [stdout] | [INFO] [stdout] 857 - let (player_score, cpu_score): (u8, u8) = new_board.get_score(); [INFO] [stdout] 857 + let (main::HEIGHT, cpu_score): (u8, u8) = new_board.get_score(); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `difficulty` [INFO] [stdout] --> src/main.rs:886:13 [INFO] [stdout] | [INFO] [stdout] 886 | let difficulty: String = match cpu_diff.trim().to_string().as_str() { [INFO] [stdout] | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_difficulty` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:715:34 [INFO] [stdout] | [INFO] [stdout] 715 | if !debug { print!("."); stdout().flush(); } [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 715 | if !debug { print!("."); let _ = stdout().flush(); } [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.37s [INFO] running `Command { std: "docker" "inspect" "915db6d4aa6566f0a66cce402e677d1fa29571304c11cfb1f15b01c2b0b0d5e9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "915db6d4aa6566f0a66cce402e677d1fa29571304c11cfb1f15b01c2b0b0d5e9", kill_on_drop: false }` [INFO] [stdout] 915db6d4aa6566f0a66cce402e677d1fa29571304c11cfb1f15b01c2b0b0d5e9 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 1f27438102b5fa37054395e26b92d261b611402a2c227f457e563120cd73ee87 [INFO] running `Command { std: "docker" "start" "-a" "1f27438102b5fa37054395e26b92d261b611402a2c227f457e563120cd73ee87", kill_on_drop: false }` [INFO] [stderr] warning: unused variable: `debug` [INFO] [stderr] --> src/main.rs:128:21 [INFO] [stderr] | [INFO] [stderr] 128 | fn print(&self, debug: bool) { [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_debug` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: value assigned to `u` is never read [INFO] [stderr] --> src/main.rs:181:17 [INFO] [stderr] | [INFO] [stderr] 181 | let mut u: u8 = 1; [INFO] [stderr] | ^ [INFO] [stderr] | [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: value assigned to `u` is never read [INFO] [stderr] --> src/main.rs:320:17 [INFO] [stderr] | [INFO] [stderr] 320 | let mut u: u8 = 1; // used as the iter for get_new_pos() [INFO] [stderr] | ^ [INFO] [stderr] | [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: unused variable: `prev_player_score` [INFO] [stderr] --> src/main.rs:841:10 [INFO] [stderr] | [INFO] [stderr] 841 | let (prev_player_score, prev_cpu_score): (u8, u8) = b.get_score(); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] help: if this is intentional, prefix it with an underscore [INFO] [stderr] | [INFO] [stderr] 841 | let (_prev_player_score, prev_cpu_score): (u8, u8) = b.get_score(); [INFO] [stderr] | + [INFO] [stderr] help: you might have meant to pattern match on the similarly named constant `HEIGHT` [INFO] [stderr] | [INFO] [stderr] 841 - let (prev_player_score, prev_cpu_score): (u8, u8) = b.get_score(); [INFO] [stderr] 841 + let (main::HEIGHT, prev_cpu_score): (u8, u8) = b.get_score(); [INFO] [stderr] | [INFO] [stderr] [INFO] [stderr] warning: unused variable: `player_score` [INFO] [stderr] --> src/main.rs:857:14 [INFO] [stderr] | [INFO] [stderr] 857 | let (player_score, cpu_score): (u8, u8) = new_board.get_score(); [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] help: if this is intentional, prefix it with an underscore [INFO] [stderr] | [INFO] [stderr] 857 | let (_player_score, cpu_score): (u8, u8) = new_board.get_score(); [INFO] [stderr] | + [INFO] [stderr] help: you might have meant to pattern match on the similarly named constant `HEIGHT` [INFO] [stderr] | [INFO] [stderr] 857 - let (player_score, cpu_score): (u8, u8) = new_board.get_score(); [INFO] [stderr] 857 + let (main::HEIGHT, cpu_score): (u8, u8) = new_board.get_score(); [INFO] [stderr] | [INFO] [stderr] [INFO] [stderr] warning: unused variable: `difficulty` [INFO] [stderr] --> src/main.rs:886:13 [INFO] [stderr] | [INFO] [stderr] 886 | let difficulty: String = match cpu_diff.trim().to_string().as_str() { [INFO] [stderr] | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_difficulty` [INFO] [stderr] [INFO] [stderr] warning: unused `Result` that must be used [INFO] [stderr] --> src/main.rs:715:34 [INFO] [stderr] | [INFO] [stderr] 715 | if !debug { print!("."); stdout().flush(); } [INFO] [stderr] | ^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] help: use `let _ = ...` to ignore the resulting value [INFO] [stderr] | [INFO] [stderr] 715 | if !debug { print!("."); let _ = stdout().flush(); } [INFO] [stderr] | +++++++ [INFO] [stderr] [INFO] [stderr] warning: `reversi` (bin "reversi" test) generated 7 warnings (run `cargo fix --bin "reversi" --tests` to apply 2 suggestions) [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.08s [INFO] [stderr] Running unittests src/main.rs (/opt/rustwide/target/debug/deps/reversi-b8ef6df1d27cb031) [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; finished in 0.00s [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "1f27438102b5fa37054395e26b92d261b611402a2c227f457e563120cd73ee87", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "1f27438102b5fa37054395e26b92d261b611402a2c227f457e563120cd73ee87", kill_on_drop: false }` [INFO] [stdout] 1f27438102b5fa37054395e26b92d261b611402a2c227f457e563120cd73ee87