[INFO] cloning repository https://github.com/JonathanNakandala/lolwut
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JonathanNakandala/lolwut" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJonathanNakandala%2Flolwut", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJonathanNakandala%2Flolwut'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0c782ca99a7a1366604658635bde83f1eeece06f
[INFO] checking JonathanNakandala/lolwut against master#7b3a7819371cef92a187e9bac8f7810ccde15216 for pr-74846
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJonathanNakandala%2Flolwut" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JonathanNakandala/lolwut on toolchain 7b3a7819371cef92a187e9bac8f7810ccde15216
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3a7819371cef92a187e9bac8f7810ccde15216" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/JonathanNakandala/lolwut
[INFO] finished tweaking git repo https://github.com/JonathanNakandala/lolwut
[INFO] tweaked toml for git repo https://github.com/JonathanNakandala/lolwut written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/JonathanNakandala/lolwut already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3a7819371cef92a187e9bac8f7810ccde15216" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+7b3a7819371cef92a187e9bac8f7810ccde15216" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5d0e5721beef8a63193f927c461b1c4b0b08aa6405c3c1dd785e0abd0c9f8b69
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "5d0e5721beef8a63193f927c461b1c4b0b08aa6405c3c1dd785e0abd0c9f8b69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5d0e5721beef8a63193f927c461b1c4b0b08aa6405c3c1dd785e0abd0c9f8b69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d0e5721beef8a63193f927c461b1c4b0b08aa6405c3c1dd785e0abd0c9f8b69", kill_on_drop: false }`
[INFO] [stdout] 5d0e5721beef8a63193f927c461b1c4b0b08aa6405c3c1dd785e0abd0c9f8b69
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+7b3a7819371cef92a187e9bac8f7810ccde15216" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 43e6c015d4c7d4da0a646f6f99929d130eaf042f5608a604e313d2a85c5aedd8
[INFO] running `Command { std: "docker" "start" "-a" "43e6c015d4c7d4da0a646f6f99929d130eaf042f5608a604e313d2a85c5aedd8", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking lolwut v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `console_dimensions`
[INFO] [stdout]   --> src/main.rs:14:13
[INFO] [stdout]    |
[INFO] [stdout] 14 |         let console_dimensions = [66, 49];
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_console_dimensions`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]    --> src/main.rs:130:13
[INFO] [stdout]     |
[INFO] [stdout] 130 |         let index = x + (y * canvas_width);
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:126:19
[INFO] [stdout]     |
[INFO] [stdout] 126 |     fn draw_pixel(mut canvas: &mut Vec<i32>, x: i32, y: i32, color: i32) {
[INFO] [stdout]     |                   ----^^^^^^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `console_dimensions`
[INFO] [stdout]   --> src/main.rs:14:13
[INFO] [stdout]    |
[INFO] [stdout] 14 |         let console_dimensions = [66, 49];
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_console_dimensions`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]    --> src/main.rs:130:13
[INFO] [stdout]     |
[INFO] [stdout] 130 |         let index = x + (y * canvas_width);
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:126:19
[INFO] [stdout]     |
[INFO] [stdout] 126 |     fn draw_pixel(mut canvas: &mut Vec<i32>, x: i32, y: i32, color: i32) {
[INFO] [stdout]     |                   ----^^^^^^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.30s
[INFO] running `Command { std: "docker" "inspect" "43e6c015d4c7d4da0a646f6f99929d130eaf042f5608a604e313d2a85c5aedd8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43e6c015d4c7d4da0a646f6f99929d130eaf042f5608a604e313d2a85c5aedd8", kill_on_drop: false }`
[INFO] [stdout] 43e6c015d4c7d4da0a646f6f99929d130eaf042f5608a604e313d2a85c5aedd8