[INFO] cloning repository https://github.com/yi-jiayu/snake
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yi-jiayu/snake" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyi-jiayu%2Fsnake", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyi-jiayu%2Fsnake'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f6b02f51c197a33343474392a090adfcdfce0f50
[INFO] checking yi-jiayu/snake against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyi-jiayu%2Fsnake" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yi-jiayu/snake on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/yi-jiayu/snake
[INFO] finished tweaking git repo https://github.com/yi-jiayu/snake
[INFO] tweaked toml for git repo https://github.com/yi-jiayu/snake written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/yi-jiayu/snake 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 53c63621e2bd7a3fb6f0d29e749dd83c760a4c9fcede3ffd6204b2aa9ac77d02
[INFO] running `Command { std: "docker" "start" "-a" "53c63621e2bd7a3fb6f0d29e749dd83c760a4c9fcede3ffd6204b2aa9ac77d02", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "53c63621e2bd7a3fb6f0d29e749dd83c760a4c9fcede3ffd6204b2aa9ac77d02", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53c63621e2bd7a3fb6f0d29e749dd83c760a4c9fcede3ffd6204b2aa9ac77d02", kill_on_drop: false }`
[INFO] [stdout] 53c63621e2bd7a3fb6f0d29e749dd83c760a4c9fcede3ffd6204b2aa9ac77d02
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6e6a9e92318406bb77b853fa019324ce179bbc05a7ca04e5c467773f1023ed1b
[INFO] running `Command { std: "docker" "start" "-a" "6e6a9e92318406bb77b853fa019324ce179bbc05a7ca04e5c467773f1023ed1b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.88
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling version-compare v0.0.10
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling sdl2 v0.34.3
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling sdl2-sys v0.34.3
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]     Checking snake v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:128:9
[INFO] [stdout]     |
[INFO] [stdout] 128 | /         canvas.fill_rect(rect!(
[INFO] [stdout] 129 | |             offset_x,
[INFO] [stdout] 130 | |             offset_y,
[INFO] [stdout] 131 | |             (right - left + 2) * BLOCK_SIZE,
[INFO] [stdout] 132 | |             BLOCK_SIZE
[INFO] [stdout] 133 | |         ));
[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] 128 |         let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:134:9
[INFO] [stdout]     |
[INFO] [stdout] 134 | /         canvas.fill_rect(rect!(
[INFO] [stdout] 135 | |             offset_x,
[INFO] [stdout] 136 | |             offset_y + BLOCK_SIZE,
[INFO] [stdout] 137 | |             BLOCK_SIZE,
[INFO] [stdout] 138 | |             (top - bottom) * BLOCK_SIZE
[INFO] [stdout] 139 | |         ));
[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] 134 |         let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:140:9
[INFO] [stdout]     |
[INFO] [stdout] 140 | /         canvas.fill_rect(rect!(
[INFO] [stdout] 141 | |             offset_x + (right - left + 1) * BLOCK_SIZE,
[INFO] [stdout] 142 | |             offset_y + BLOCK_SIZE,
[INFO] [stdout] 143 | |             BLOCK_SIZE,
[INFO] [stdout] 144 | |             (top - bottom) * BLOCK_SIZE
[INFO] [stdout] 145 | |         ));
[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] 140 |         let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:146:9
[INFO] [stdout]     |
[INFO] [stdout] 146 | /         canvas.fill_rect(rect!(
[INFO] [stdout] 147 | |             offset_x,
[INFO] [stdout] 148 | |             offset_y + (top - bottom + 1) * BLOCK_SIZE,
[INFO] [stdout] 149 | |             (right - left + 2) * BLOCK_SIZE,
[INFO] [stdout] 150 | |             BLOCK_SIZE
[INFO] [stdout] 151 | |         ));
[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] 146 |         let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:156:13
[INFO] [stdout]     |
[INFO] [stdout] 156 | /             canvas.fill_rect(rect!(
[INFO] [stdout] 157 | |                 offset_x + BLOCK_SIZE + x * BLOCK_SIZE + 1,
[INFO] [stdout] 158 | |                 offset_y + BLOCK_SIZE + y * BLOCK_SIZE + 1,
[INFO] [stdout] 159 | |                 BLOCK_SIZE - 2,
[INFO] [stdout] 160 | |                 BLOCK_SIZE - 2
[INFO] [stdout] 161 | |             ));
[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] 156 |             let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:165:21
[INFO] [stdout]     |
[INFO] [stdout] 165 | /                     canvas.fill_rect(rect!(
[INFO] [stdout] 166 | |                         offset_x + BLOCK_SIZE + x * BLOCK_SIZE - 1,
[INFO] [stdout] 167 | |                         offset_y + BLOCK_SIZE + y * BLOCK_SIZE + 1,
[INFO] [stdout] 168 | |                         2,
[INFO] [stdout] 169 | |                         BLOCK_SIZE - 2
[INFO] [stdout] 170 | |                     ));
[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] 165 |                     let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:173:21
[INFO] [stdout]     |
[INFO] [stdout] 173 | /                     canvas.fill_rect(rect!(
[INFO] [stdout] 174 | |                         offset_x + BLOCK_SIZE + x * BLOCK_SIZE + BLOCK_SIZE - 1,
[INFO] [stdout] 175 | |                         offset_y + BLOCK_SIZE + y * BLOCK_SIZE + 1,
[INFO] [stdout] 176 | |                         2,
[INFO] [stdout] 177 | |                         BLOCK_SIZE - 2
[INFO] [stdout] 178 | |                     ));
[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] 173 |                     let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:181:21
[INFO] [stdout]     |
[INFO] [stdout] 181 | /                     canvas.fill_rect(rect!(
[INFO] [stdout] 182 | |                         offset_x + BLOCK_SIZE + x * BLOCK_SIZE + 1,
[INFO] [stdout] 183 | |                         offset_y + BLOCK_SIZE + y * BLOCK_SIZE + BLOCK_SIZE - 1,
[INFO] [stdout] 184 | |                         BLOCK_SIZE - 2,
[INFO] [stdout] 185 | |                         2
[INFO] [stdout] 186 | |                     ));
[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] 181 |                     let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:189:21
[INFO] [stdout]     |
[INFO] [stdout] 189 | /                     canvas.fill_rect(rect!(
[INFO] [stdout] 190 | |                         offset_x + BLOCK_SIZE + x * BLOCK_SIZE + 1,
[INFO] [stdout] 191 | |                         offset_y + BLOCK_SIZE + y * BLOCK_SIZE - 1,
[INFO] [stdout] 192 | |                         BLOCK_SIZE - 2,
[INFO] [stdout] 193 | |                         2
[INFO] [stdout] 194 | |                     ));
[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] 189 |                     let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:201:9
[INFO] [stdout]     |
[INFO] [stdout] 201 | /         canvas.fill_rect(rect!(
[INFO] [stdout] 202 | |             offset_x + BLOCK_SIZE + x * BLOCK_SIZE + 1,
[INFO] [stdout] 203 | |             offset_y + BLOCK_SIZE + y * BLOCK_SIZE + 1,
[INFO] [stdout] 204 | |             BLOCK_SIZE - 2,
[INFO] [stdout] 205 | |             BLOCK_SIZE - 2
[INFO] [stdout] 206 | |         ));
[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] 201 |         let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:128:9
[INFO] [stdout]     |
[INFO] [stdout] 128 | /         canvas.fill_rect(rect!(
[INFO] [stdout] 129 | |             offset_x,
[INFO] [stdout] 130 | |             offset_y,
[INFO] [stdout] 131 | |             (right - left + 2) * BLOCK_SIZE,
[INFO] [stdout] 132 | |             BLOCK_SIZE
[INFO] [stdout] 133 | |         ));
[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] 128 |         let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:134:9
[INFO] [stdout]     |
[INFO] [stdout] 134 | /         canvas.fill_rect(rect!(
[INFO] [stdout] 135 | |             offset_x,
[INFO] [stdout] 136 | |             offset_y + BLOCK_SIZE,
[INFO] [stdout] 137 | |             BLOCK_SIZE,
[INFO] [stdout] 138 | |             (top - bottom) * BLOCK_SIZE
[INFO] [stdout] 139 | |         ));
[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] 134 |         let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:140:9
[INFO] [stdout]     |
[INFO] [stdout] 140 | /         canvas.fill_rect(rect!(
[INFO] [stdout] 141 | |             offset_x + (right - left + 1) * BLOCK_SIZE,
[INFO] [stdout] 142 | |             offset_y + BLOCK_SIZE,
[INFO] [stdout] 143 | |             BLOCK_SIZE,
[INFO] [stdout] 144 | |             (top - bottom) * BLOCK_SIZE
[INFO] [stdout] 145 | |         ));
[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] 140 |         let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:146:9
[INFO] [stdout]     |
[INFO] [stdout] 146 | /         canvas.fill_rect(rect!(
[INFO] [stdout] 147 | |             offset_x,
[INFO] [stdout] 148 | |             offset_y + (top - bottom + 1) * BLOCK_SIZE,
[INFO] [stdout] 149 | |             (right - left + 2) * BLOCK_SIZE,
[INFO] [stdout] 150 | |             BLOCK_SIZE
[INFO] [stdout] 151 | |         ));
[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] 146 |         let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:156:13
[INFO] [stdout]     |
[INFO] [stdout] 156 | /             canvas.fill_rect(rect!(
[INFO] [stdout] 157 | |                 offset_x + BLOCK_SIZE + x * BLOCK_SIZE + 1,
[INFO] [stdout] 158 | |                 offset_y + BLOCK_SIZE + y * BLOCK_SIZE + 1,
[INFO] [stdout] 159 | |                 BLOCK_SIZE - 2,
[INFO] [stdout] 160 | |                 BLOCK_SIZE - 2
[INFO] [stdout] 161 | |             ));
[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] 156 |             let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:165:21
[INFO] [stdout]     |
[INFO] [stdout] 165 | /                     canvas.fill_rect(rect!(
[INFO] [stdout] 166 | |                         offset_x + BLOCK_SIZE + x * BLOCK_SIZE - 1,
[INFO] [stdout] 167 | |                         offset_y + BLOCK_SIZE + y * BLOCK_SIZE + 1,
[INFO] [stdout] 168 | |                         2,
[INFO] [stdout] 169 | |                         BLOCK_SIZE - 2
[INFO] [stdout] 170 | |                     ));
[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] 165 |                     let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:173:21
[INFO] [stdout]     |
[INFO] [stdout] 173 | /                     canvas.fill_rect(rect!(
[INFO] [stdout] 174 | |                         offset_x + BLOCK_SIZE + x * BLOCK_SIZE + BLOCK_SIZE - 1,
[INFO] [stdout] 175 | |                         offset_y + BLOCK_SIZE + y * BLOCK_SIZE + 1,
[INFO] [stdout] 176 | |                         2,
[INFO] [stdout] 177 | |                         BLOCK_SIZE - 2
[INFO] [stdout] 178 | |                     ));
[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] 173 |                     let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:181:21
[INFO] [stdout]     |
[INFO] [stdout] 181 | /                     canvas.fill_rect(rect!(
[INFO] [stdout] 182 | |                         offset_x + BLOCK_SIZE + x * BLOCK_SIZE + 1,
[INFO] [stdout] 183 | |                         offset_y + BLOCK_SIZE + y * BLOCK_SIZE + BLOCK_SIZE - 1,
[INFO] [stdout] 184 | |                         BLOCK_SIZE - 2,
[INFO] [stdout] 185 | |                         2
[INFO] [stdout] 186 | |                     ));
[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] 181 |                     let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:189:21
[INFO] [stdout]     |
[INFO] [stdout] 189 | /                     canvas.fill_rect(rect!(
[INFO] [stdout] 190 | |                         offset_x + BLOCK_SIZE + x * BLOCK_SIZE + 1,
[INFO] [stdout] 191 | |                         offset_y + BLOCK_SIZE + y * BLOCK_SIZE - 1,
[INFO] [stdout] 192 | |                         BLOCK_SIZE - 2,
[INFO] [stdout] 193 | |                         2
[INFO] [stdout] 194 | |                     ));
[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] 189 |                     let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:201:9
[INFO] [stdout]     |
[INFO] [stdout] 201 | /         canvas.fill_rect(rect!(
[INFO] [stdout] 202 | |             offset_x + BLOCK_SIZE + x * BLOCK_SIZE + 1,
[INFO] [stdout] 203 | |             offset_y + BLOCK_SIZE + y * BLOCK_SIZE + 1,
[INFO] [stdout] 204 | |             BLOCK_SIZE - 2,
[INFO] [stdout] 205 | |             BLOCK_SIZE - 2
[INFO] [stdout] 206 | |         ));
[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] 201 |         let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.73s
[INFO] running `Command { std: "docker" "inspect" "6e6a9e92318406bb77b853fa019324ce179bbc05a7ca04e5c467773f1023ed1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e6a9e92318406bb77b853fa019324ce179bbc05a7ca04e5c467773f1023ed1b", kill_on_drop: false }`
[INFO] [stdout] 6e6a9e92318406bb77b853fa019324ce179bbc05a7ca04e5c467773f1023ed1b
[INFO] checking yi-jiayu/snake against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyi-jiayu%2Fsnake" "/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/yi-jiayu/snake on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/yi-jiayu/snake
[INFO] finished tweaking git repo https://github.com/yi-jiayu/snake
[INFO] tweaked toml for git repo https://github.com/yi-jiayu/snake written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/yi-jiayu/snake 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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5958265d34dd0b03d5046a1a80f4c38ffd271110a2e524686f86c36e6752f5a4
[INFO] running `Command { std: "docker" "start" "-a" "5958265d34dd0b03d5046a1a80f4c38ffd271110a2e524686f86c36e6752f5a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5958265d34dd0b03d5046a1a80f4c38ffd271110a2e524686f86c36e6752f5a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5958265d34dd0b03d5046a1a80f4c38ffd271110a2e524686f86c36e6752f5a4", kill_on_drop: false }`
[INFO] [stdout] 5958265d34dd0b03d5046a1a80f4c38ffd271110a2e524686f86c36e6752f5a4
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a9a99819a0173199fefa9e345bc321e2b252aaa572cf5ad9857517625f82b4e2
[INFO] running `Command { std: "docker" "start" "-a" "a9a99819a0173199fefa9e345bc321e2b252aaa572cf5ad9857517625f82b4e2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.88
[INFO] [stderr]    Compiling version-compare v0.0.10
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling sdl2 v0.34.3
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling sdl2-sys v0.34.3
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]     Checking snake v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:128:9
[INFO] [stdout]     |
[INFO] [stdout] 128 | /         canvas.fill_rect(rect!(
[INFO] [stdout] 129 | |             offset_x,
[INFO] [stdout] 130 | |             offset_y,
[INFO] [stdout] 131 | |             (right - left + 2) * BLOCK_SIZE,
[INFO] [stdout] 132 | |             BLOCK_SIZE
[INFO] [stdout] 133 | |         ));
[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] 128 |         let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:134:9
[INFO] [stdout]     |
[INFO] [stdout] 134 | /         canvas.fill_rect(rect!(
[INFO] [stdout] 135 | |             offset_x,
[INFO] [stdout] 136 | |             offset_y + BLOCK_SIZE,
[INFO] [stdout] 137 | |             BLOCK_SIZE,
[INFO] [stdout] 138 | |             (top - bottom) * BLOCK_SIZE
[INFO] [stdout] 139 | |         ));
[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] 134 |         let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:140:9
[INFO] [stdout]     |
[INFO] [stdout] 140 | /         canvas.fill_rect(rect!(
[INFO] [stdout] 141 | |             offset_x + (right - left + 1) * BLOCK_SIZE,
[INFO] [stdout] 142 | |             offset_y + BLOCK_SIZE,
[INFO] [stdout] 143 | |             BLOCK_SIZE,
[INFO] [stdout] 144 | |             (top - bottom) * BLOCK_SIZE
[INFO] [stdout] 145 | |         ));
[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] 140 |         let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:146:9
[INFO] [stdout]     |
[INFO] [stdout] 146 | /         canvas.fill_rect(rect!(
[INFO] [stdout] 147 | |             offset_x,
[INFO] [stdout] 148 | |             offset_y + (top - bottom + 1) * BLOCK_SIZE,
[INFO] [stdout] 149 | |             (right - left + 2) * BLOCK_SIZE,
[INFO] [stdout] 150 | |             BLOCK_SIZE
[INFO] [stdout] 151 | |         ));
[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] 146 |         let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:156:13
[INFO] [stdout]     |
[INFO] [stdout] 156 | /             canvas.fill_rect(rect!(
[INFO] [stdout] 157 | |                 offset_x + BLOCK_SIZE + x * BLOCK_SIZE + 1,
[INFO] [stdout] 158 | |                 offset_y + BLOCK_SIZE + y * BLOCK_SIZE + 1,
[INFO] [stdout] 159 | |                 BLOCK_SIZE - 2,
[INFO] [stdout] 160 | |                 BLOCK_SIZE - 2
[INFO] [stdout] 161 | |             ));
[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] 156 |             let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:165:21
[INFO] [stdout]     |
[INFO] [stdout] 165 | /                     canvas.fill_rect(rect!(
[INFO] [stdout] 166 | |                         offset_x + BLOCK_SIZE + x * BLOCK_SIZE - 1,
[INFO] [stdout] 167 | |                         offset_y + BLOCK_SIZE + y * BLOCK_SIZE + 1,
[INFO] [stdout] 168 | |                         2,
[INFO] [stdout] 169 | |                         BLOCK_SIZE - 2
[INFO] [stdout] 170 | |                     ));
[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] 165 |                     let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:173:21
[INFO] [stdout]     |
[INFO] [stdout] 173 | /                     canvas.fill_rect(rect!(
[INFO] [stdout] 174 | |                         offset_x + BLOCK_SIZE + x * BLOCK_SIZE + BLOCK_SIZE - 1,
[INFO] [stdout] 175 | |                         offset_y + BLOCK_SIZE + y * BLOCK_SIZE + 1,
[INFO] [stdout] 176 | |                         2,
[INFO] [stdout] 177 | |                         BLOCK_SIZE - 2
[INFO] [stdout] 178 | |                     ));
[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] 173 |                     let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:181:21
[INFO] [stdout]     |
[INFO] [stdout] 181 | /                     canvas.fill_rect(rect!(
[INFO] [stdout] 182 | |                         offset_x + BLOCK_SIZE + x * BLOCK_SIZE + 1,
[INFO] [stdout] 183 | |                         offset_y + BLOCK_SIZE + y * BLOCK_SIZE + BLOCK_SIZE - 1,
[INFO] [stdout] 184 | |                         BLOCK_SIZE - 2,
[INFO] [stdout] 185 | |                         2
[INFO] [stdout] 186 | |                     ));
[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] 181 |                     let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:189:21
[INFO] [stdout]     |
[INFO] [stdout] 189 | /                     canvas.fill_rect(rect!(
[INFO] [stdout] 190 | |                         offset_x + BLOCK_SIZE + x * BLOCK_SIZE + 1,
[INFO] [stdout] 191 | |                         offset_y + BLOCK_SIZE + y * BLOCK_SIZE - 1,
[INFO] [stdout] 192 | |                         BLOCK_SIZE - 2,
[INFO] [stdout] 193 | |                         2
[INFO] [stdout] 194 | |                     ));
[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] 189 |                     let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:201:9
[INFO] [stdout]     |
[INFO] [stdout] 201 | /         canvas.fill_rect(rect!(
[INFO] [stdout] 202 | |             offset_x + BLOCK_SIZE + x * BLOCK_SIZE + 1,
[INFO] [stdout] 203 | |             offset_y + BLOCK_SIZE + y * BLOCK_SIZE + 1,
[INFO] [stdout] 204 | |             BLOCK_SIZE - 2,
[INFO] [stdout] 205 | |             BLOCK_SIZE - 2
[INFO] [stdout] 206 | |         ));
[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] 201 |         let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:128:9
[INFO] [stdout]     |
[INFO] [stdout] 128 | /         canvas.fill_rect(rect!(
[INFO] [stdout] 129 | |             offset_x,
[INFO] [stdout] 130 | |             offset_y,
[INFO] [stdout] 131 | |             (right - left + 2) * BLOCK_SIZE,
[INFO] [stdout] 132 | |             BLOCK_SIZE
[INFO] [stdout] 133 | |         ));
[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] 128 |         let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:134:9
[INFO] [stdout]     |
[INFO] [stdout] 134 | /         canvas.fill_rect(rect!(
[INFO] [stdout] 135 | |             offset_x,
[INFO] [stdout] 136 | |             offset_y + BLOCK_SIZE,
[INFO] [stdout] 137 | |             BLOCK_SIZE,
[INFO] [stdout] 138 | |             (top - bottom) * BLOCK_SIZE
[INFO] [stdout] 139 | |         ));
[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] 134 |         let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:140:9
[INFO] [stdout]     |
[INFO] [stdout] 140 | /         canvas.fill_rect(rect!(
[INFO] [stdout] 141 | |             offset_x + (right - left + 1) * BLOCK_SIZE,
[INFO] [stdout] 142 | |             offset_y + BLOCK_SIZE,
[INFO] [stdout] 143 | |             BLOCK_SIZE,
[INFO] [stdout] 144 | |             (top - bottom) * BLOCK_SIZE
[INFO] [stdout] 145 | |         ));
[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] 140 |         let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:146:9
[INFO] [stdout]     |
[INFO] [stdout] 146 | /         canvas.fill_rect(rect!(
[INFO] [stdout] 147 | |             offset_x,
[INFO] [stdout] 148 | |             offset_y + (top - bottom + 1) * BLOCK_SIZE,
[INFO] [stdout] 149 | |             (right - left + 2) * BLOCK_SIZE,
[INFO] [stdout] 150 | |             BLOCK_SIZE
[INFO] [stdout] 151 | |         ));
[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] 146 |         let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:156:13
[INFO] [stdout]     |
[INFO] [stdout] 156 | /             canvas.fill_rect(rect!(
[INFO] [stdout] 157 | |                 offset_x + BLOCK_SIZE + x * BLOCK_SIZE + 1,
[INFO] [stdout] 158 | |                 offset_y + BLOCK_SIZE + y * BLOCK_SIZE + 1,
[INFO] [stdout] 159 | |                 BLOCK_SIZE - 2,
[INFO] [stdout] 160 | |                 BLOCK_SIZE - 2
[INFO] [stdout] 161 | |             ));
[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] 156 |             let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:165:21
[INFO] [stdout]     |
[INFO] [stdout] 165 | /                     canvas.fill_rect(rect!(
[INFO] [stdout] 166 | |                         offset_x + BLOCK_SIZE + x * BLOCK_SIZE - 1,
[INFO] [stdout] 167 | |                         offset_y + BLOCK_SIZE + y * BLOCK_SIZE + 1,
[INFO] [stdout] 168 | |                         2,
[INFO] [stdout] 169 | |                         BLOCK_SIZE - 2
[INFO] [stdout] 170 | |                     ));
[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] 165 |                     let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:173:21
[INFO] [stdout]     |
[INFO] [stdout] 173 | /                     canvas.fill_rect(rect!(
[INFO] [stdout] 174 | |                         offset_x + BLOCK_SIZE + x * BLOCK_SIZE + BLOCK_SIZE - 1,
[INFO] [stdout] 175 | |                         offset_y + BLOCK_SIZE + y * BLOCK_SIZE + 1,
[INFO] [stdout] 176 | |                         2,
[INFO] [stdout] 177 | |                         BLOCK_SIZE - 2
[INFO] [stdout] 178 | |                     ));
[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] 173 |                     let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:181:21
[INFO] [stdout]     |
[INFO] [stdout] 181 | /                     canvas.fill_rect(rect!(
[INFO] [stdout] 182 | |                         offset_x + BLOCK_SIZE + x * BLOCK_SIZE + 1,
[INFO] [stdout] 183 | |                         offset_y + BLOCK_SIZE + y * BLOCK_SIZE + BLOCK_SIZE - 1,
[INFO] [stdout] 184 | |                         BLOCK_SIZE - 2,
[INFO] [stdout] 185 | |                         2
[INFO] [stdout] 186 | |                     ));
[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] 181 |                     let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:189:21
[INFO] [stdout]     |
[INFO] [stdout] 189 | /                     canvas.fill_rect(rect!(
[INFO] [stdout] 190 | |                         offset_x + BLOCK_SIZE + x * BLOCK_SIZE + 1,
[INFO] [stdout] 191 | |                         offset_y + BLOCK_SIZE + y * BLOCK_SIZE - 1,
[INFO] [stdout] 192 | |                         BLOCK_SIZE - 2,
[INFO] [stdout] 193 | |                         2
[INFO] [stdout] 194 | |                     ));
[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] 189 |                     let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:201:9
[INFO] [stdout]     |
[INFO] [stdout] 201 | /         canvas.fill_rect(rect!(
[INFO] [stdout] 202 | |             offset_x + BLOCK_SIZE + x * BLOCK_SIZE + 1,
[INFO] [stdout] 203 | |             offset_y + BLOCK_SIZE + y * BLOCK_SIZE + 1,
[INFO] [stdout] 204 | |             BLOCK_SIZE - 2,
[INFO] [stdout] 205 | |             BLOCK_SIZE - 2
[INFO] [stdout] 206 | |         ));
[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] 201 |         let _ = canvas.fill_rect(rect!(
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.40s
[INFO] running `Command { std: "docker" "inspect" "a9a99819a0173199fefa9e345bc321e2b252aaa572cf5ad9857517625f82b4e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9a99819a0173199fefa9e345bc321e2b252aaa572cf5ad9857517625f82b4e2", kill_on_drop: false }`
[INFO] [stdout] a9a99819a0173199fefa9e345bc321e2b252aaa572cf5ad9857517625f82b4e2