[INFO] cloning repository https://github.com/jakeec/minesweeper
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jakeec/minesweeper" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper'...
[INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper: No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 1)
[INFO] cloning repository https://github.com/jakeec/minesweeper
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jakeec/minesweeper" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper'...
[INFO] [stderr] error: copy-fd: write returned: No space left on device
[INFO] [stderr] fatal: cannot copy '/usr/share/git-core/templates/hooks/fsmonitor-watchman.sample' to '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper/hooks/fsmonitor-watchman.sample': No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 2)
[INFO] cloning repository https://github.com/jakeec/minesweeper
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jakeec/minesweeper" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper'...
[INFO] [stderr] error: copy-fd: write returned: No space left on device
[INFO] [stderr] fatal: cannot copy '/usr/share/git-core/templates/description' to '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper/description': No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 3)
[INFO] cloning repository https://github.com/jakeec/minesweeper
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jakeec/minesweeper" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper'...
[INFO] [stderr] fatal: sha1 file '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper/objects/pack/tmp_rev_Giwz64' write error. Out of diskspace
[INFO] [stderr] fatal: fetch-pack: invalid index-pack output
[WARN] Retrying crate fetch in 3 seconds (attempt 4)
[INFO] cloning repository https://github.com/jakeec/minesweeper
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jakeec/minesweeper" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper'...
[INFO] [stderr] error: copy-fd: write returned: No space left on device
[INFO] [stderr] fatal: cannot copy '/usr/share/git-core/templates/info/exclude' to '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper/info/exclude': No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 5)
[INFO] cloning repository https://github.com/jakeec/minesweeper
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jakeec/minesweeper" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper'...
[INFO] [stderr] error: copy-fd: write returned: No space left on device
[INFO] [stderr] fatal: cannot copy '/usr/share/git-core/templates/hooks/fsmonitor-watchman.sample' to '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper/hooks/fsmonitor-watchman.sample': No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 6)
[INFO] cloning repository https://github.com/jakeec/minesweeper
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jakeec/minesweeper" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper'...
[INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper: No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 7)
[INFO] cloning repository https://github.com/jakeec/minesweeper
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jakeec/minesweeper" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper'...
[INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper: No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 8)
[INFO] cloning repository https://github.com/jakeec/minesweeper
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jakeec/minesweeper" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper'...
[INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper: No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 9)
[INFO] cloning repository https://github.com/jakeec/minesweeper
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jakeec/minesweeper" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper'...
[INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper: No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 10)
[INFO] cloning repository https://github.com/jakeec/minesweeper
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jakeec/minesweeper" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper'...
[INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper: No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 11)
[INFO] cloning repository https://github.com/jakeec/minesweeper
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jakeec/minesweeper" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper'...
[INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper: No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 12)
[INFO] cloning repository https://github.com/jakeec/minesweeper
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jakeec/minesweeper" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper'...
[INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper: No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 13)
[INFO] cloning repository https://github.com/jakeec/minesweeper
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jakeec/minesweeper" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c5b73ef1a3098b82dd3a54f6dd564ae1abff13ff
[INFO] checking jakeec/minesweeper against try#d12484522bcab8d07e325c6570f226a2faace3f7 for pr-128425-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakeec%2Fminesweeper" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jakeec/minesweeper on toolchain d12484522bcab8d07e325c6570f226a2faace3f7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d12484522bcab8d07e325c6570f226a2faace3f7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jakeec/minesweeper
[INFO] finished tweaking git repo https://github.com/jakeec/minesweeper
[INFO] tweaked toml for git repo https://github.com/jakeec/minesweeper written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/jakeec/minesweeper 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" "+d12484522bcab8d07e325c6570f226a2faace3f7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded getch v0.2.1
[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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+d12484522bcab8d07e325c6570f226a2faace3f7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fd91ed2a9422f45f74ee6e37d4c244e9dbec91d210a08669ce56c067c81b0843
[INFO] running `Command { std: "docker" "start" "-a" "fd91ed2a9422f45f74ee6e37d4c244e9dbec91d210a08669ce56c067c81b0843", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd91ed2a9422f45f74ee6e37d4c244e9dbec91d210a08669ce56c067c81b0843", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd91ed2a9422f45f74ee6e37d4c244e9dbec91d210a08669ce56c067c81b0843", kill_on_drop: false }`
[INFO] [stdout] fd91ed2a9422f45f74ee6e37d4c244e9dbec91d210a08669ce56c067c81b0843
[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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+d12484522bcab8d07e325c6570f226a2faace3f7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5f6a4153979c39ac29a4a64f322eb9827a031b91b2aa43ee242e7b4b3e025fa5
[INFO] running `Command { std: "docker" "start" "-a" "5f6a4153979c39ac29a4a64f322eb9827a031b91b2aa43ee242e7b4b3e025fa5", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]     Checking termcolor v1.1.0
[INFO] [stderr]     Checking c2-chacha v0.2.3
[INFO] [stderr]     Checking termios v0.2.2
[INFO] [stderr]     Checking getch v0.2.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking minesweeper v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::io::Stdin`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::Stdin;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Stdin`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::Stdin;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/minesweeper.rs:42:13
[INFO] [stdout]    |
[INFO] [stdout] 42 |         for x in 0..dimensions.x {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/minesweeper.rs:44:17
[INFO] [stdout]    |
[INFO] [stdout] 44 |             for y in 0..dimensions.y {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/minesweeper.rs:42:13
[INFO] [stdout]    |
[INFO] [stdout] 42 |         for x in 0..dimensions.x {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/minesweeper.rs:44:17
[INFO] [stdout]    |
[INFO] [stdout] 44 |             for y in 0..dimensions.y {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]  --> src/main.rs:8:13
[INFO] [stdout]   |
[INFO] [stdout] 8 |         Err(err) => None,
[INFO] [stdout]   |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]  --> src/main.rs:8:13
[INFO] [stdout]   |
[INFO] [stdout] 8 |         Err(err) => None,
[INFO] [stdout]   |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Win` is never constructed
[INFO] [stdout]    --> src/minesweeper.rs:127:5
[INFO] [stdout]     |
[INFO] [stdout] 126 | pub enum GameState {
[INFO] [stdout]     |          --------- variant in this enum
[INFO] [stdout] 127 |     Win,
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Win` is never constructed
[INFO] [stdout]    --> src/minesweeper.rs:127:5
[INFO] [stdout]     |
[INFO] [stdout] 126 | pub enum GameState {
[INFO] [stdout]     |          --------- variant in this enum
[INFO] [stdout] 127 |     Win,
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |         stdin.read_line(&mut input);
[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)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 29 |         let _ = stdin.read_line(&mut input);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |         stdin.read_line(&mut input);
[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)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 29 |         let _ = stdin.read_line(&mut input);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/minesweeper.rs:207:25
[INFO] [stdout]     |
[INFO] [stdout] 207 | /                         match revealed {
[INFO] [stdout] 208 | |                             HiddenState::Hidden => write!(&mut stdout, "⬜ "),
[INFO] [stdout] 209 | |                             HiddenState::Flagged => write!(&mut stdout, "🚩 "),
[INFO] [stdout] 210 | |                             HiddenState::Revealed => match state {
[INFO] [stdout] ...   |
[INFO] [stdout] 214 | |                             },
[INFO] [stdout] 215 | |                         };
[INFO] [stdout]     | |_________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 207 |                         let _ = match revealed {
[INFO] [stdout]     |                         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/minesweeper.rs:207:25
[INFO] [stdout]     |
[INFO] [stdout] 207 | /                         match revealed {
[INFO] [stdout] 208 | |                             HiddenState::Hidden => write!(&mut stdout, "⬜ "),
[INFO] [stdout] 209 | |                             HiddenState::Flagged => write!(&mut stdout, "🚩 "),
[INFO] [stdout] 210 | |                             HiddenState::Revealed => match state {
[INFO] [stdout] ...   |
[INFO] [stdout] 214 | |                             },
[INFO] [stdout] 215 | |                         };
[INFO] [stdout]     | |_________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 207 |                         let _ = match revealed {
[INFO] [stdout]     |                         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.58s
[INFO] running `Command { std: "docker" "inspect" "5f6a4153979c39ac29a4a64f322eb9827a031b91b2aa43ee242e7b4b3e025fa5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f6a4153979c39ac29a4a64f322eb9827a031b91b2aa43ee242e7b4b3e025fa5", kill_on_drop: false }`
[INFO] [stdout] 5f6a4153979c39ac29a4a64f322eb9827a031b91b2aa43ee242e7b4b3e025fa5
