[INFO] cloning repository https://github.com/apjaffe/aoc2019 [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/apjaffe/aoc2019" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fapjaffe%2Faoc2019", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fapjaffe%2Faoc2019'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 02e48ecc5fa7602ff3702fe41c505a4521225adc [INFO] checking apjaffe/aoc2019 against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fapjaffe%2Faoc2019" "/workspace/builds/worker-12/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/apjaffe/aoc2019 on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/apjaffe/aoc2019 [INFO] finished tweaking git repo https://github.com/apjaffe/aoc2019 [INFO] tweaked toml for git repo https://github.com/apjaffe/aoc2019 written to /workspace/builds/worker-12/source/Cargo.toml [INFO] crate git repo https://github.com/apjaffe/aoc2019 already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 7acb0c22a0cbc54014529691b44191edac31938bdc62521b7aca0c2323634658 [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" "7acb0c22a0cbc54014529691b44191edac31938bdc62521b7aca0c2323634658", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "7acb0c22a0cbc54014529691b44191edac31938bdc62521b7aca0c2323634658", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "7acb0c22a0cbc54014529691b44191edac31938bdc62521b7aca0c2323634658", kill_on_drop: false }` [INFO] [stdout] 7acb0c22a0cbc54014529691b44191edac31938bdc62521b7aca0c2323634658 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 320fecd03bb88aa669d1a64045bd0565c64380d0c492dd152e103e53516446ef [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" "320fecd03bb88aa669d1a64045bd0565c64380d0c492dd152e103e53516446ef", kill_on_drop: false }` [INFO] [stderr] Checking aoc2019 v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `std::convert::identity` [INFO] [stdout] --> src/bin/day4-1.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::convert::identity; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::convert::identity` [INFO] [stdout] --> src/bin/day4-2.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::convert::identity; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> src/bin/day13-2.rs:23:35 [INFO] [stdout] | [INFO] [stdout] 23 | *self.pixels.iter().filter(|((x,y),v)| **v==pixel).map(|((x,y),v)| x).min().unwrap() [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/bin/day13-2.rs:23:37 [INFO] [stdout] | [INFO] [stdout] 23 | *self.pixels.iter().filter(|((x,y),v)| **v==pixel).map(|((x,y),v)| x).min().unwrap() [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> src/bin/day13-2.rs:23:65 [INFO] [stdout] | [INFO] [stdout] 23 | *self.pixels.iter().filter(|((x,y),v)| **v==pixel).map(|((x,y),v)| x).min().unwrap() [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v` [INFO] [stdout] --> src/bin/day13-2.rs:23:68 [INFO] [stdout] | [INFO] [stdout] 23 | *self.pixels.iter().filter(|((x,y),v)| **v==pixel).map(|((x,y),v)| x).min().unwrap() [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_v` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `term` [INFO] [stdout] --> src/bin/day13-2.rs:25:57 [INFO] [stdout] | [INFO] [stdout] 25 | fn read_frame(self: &mut Screen, comp: &mut Computer, term: &mut Bytes) -> bool { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_term` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> src/bin/day3-2.rs:18:13 [INFO] [stdout] | [INFO] [stdout] 18 | for i in 0..len { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/day13-2.rs:78:9 [INFO] [stdout] | [INFO] [stdout] 78 | let mut buffer = fs::read_to_string("inputs/day13").unwrap(); [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: variable does not need to be mutable [INFO] [stdout] --> src/bin/day13-2.rs:83:9 [INFO] [stdout] | [INFO] [stdout] 83 | let mut stdin = io::stdin(); [INFO] [stdout] | ----^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/day13-2.rs:84:9 [INFO] [stdout] | [INFO] [stdout] 84 | let mut reader = stdin.lock(); [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `dir` [INFO] [stdout] --> src/bin/day13-2.rs:11:3 [INFO] [stdout] | [INFO] [stdout] 11 | dir: i64 [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 9 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/day12-2.rs:85:7 [INFO] [stdout] | [INFO] [stdout] 85 | let mut total = repeats.iter().fold(1, |accum, i| accum * i / calc_gcd(accum, *i)); [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: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> src/bin/day13-2.rs:23:35 [INFO] [stdout] | [INFO] [stdout] 23 | *self.pixels.iter().filter(|((x,y),v)| **v==pixel).map(|((x,y),v)| x).min().unwrap() [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/bin/day13-2.rs:23:37 [INFO] [stdout] | [INFO] [stdout] 23 | *self.pixels.iter().filter(|((x,y),v)| **v==pixel).map(|((x,y),v)| x).min().unwrap() [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> src/bin/day13-2.rs:23:65 [INFO] [stdout] | [INFO] [stdout] 23 | *self.pixels.iter().filter(|((x,y),v)| **v==pixel).map(|((x,y),v)| x).min().unwrap() [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v` [INFO] [stdout] --> src/bin/day13-2.rs:23:68 [INFO] [stdout] | [INFO] [stdout] 23 | *self.pixels.iter().filter(|((x,y),v)| **v==pixel).map(|((x,y),v)| x).min().unwrap() [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_v` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `term` [INFO] [stdout] --> src/bin/day13-2.rs:25:57 [INFO] [stdout] | [INFO] [stdout] 25 | fn read_frame(self: &mut Screen, comp: &mut Computer, term: &mut Bytes) -> bool { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_term` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/day13-2.rs:78:9 [INFO] [stdout] | [INFO] [stdout] 78 | let mut buffer = fs::read_to_string("inputs/day13").unwrap(); [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: variable does not need to be mutable [INFO] [stdout] --> src/bin/day13-2.rs:83:9 [INFO] [stdout] | [INFO] [stdout] 83 | let mut stdin = io::stdin(); [INFO] [stdout] | ----^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/day13-2.rs:84:9 [INFO] [stdout] | [INFO] [stdout] 84 | let mut reader = stdin.lock(); [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `dir` [INFO] [stdout] --> src/bin/day13-2.rs:11:3 [INFO] [stdout] | [INFO] [stdout] 11 | dir: i64 [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/day12-2.rs:85:7 [INFO] [stdout] | [INFO] [stdout] 85 | let mut total = repeats.iter().fold(1, |accum, i| accum * i / calc_gcd(accum, *i)); [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: 9 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `prev` [INFO] [stdout] --> src/bin/day15.rs:86:26 [INFO] [stdout] | [INFO] [stdout] 86 | while let Some((coord, prev)) = queue.pop_front() { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_prev` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `coord` [INFO] [stdout] --> src/bin/day15.rs:144:38 [INFO] [stdout] | [INFO] [stdout] 144 | let target = map.iter().filter(|(coord, typ)| **typ == 2).collect::>(); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_coord` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/day15.rs:141:9 [INFO] [stdout] | [INFO] [stdout] 141 | let mut start = Coord {x:0, y:0}; [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: struct is never constructed: `Move` [INFO] [stdout] --> src/bin/day15.rs:13:8 [INFO] [stdout] | [INFO] [stdout] 13 | struct Move { [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::convert::identity` [INFO] [stdout] --> src/bin/day4-2.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::convert::identity; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::convert::identity` [INFO] [stdout] --> src/bin/day4-1.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::convert::identity; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `comp_cp` [INFO] [stdout] --> src/bin/day5.rs:14:9 [INFO] [stdout] | [INFO] [stdout] 14 | let mut comp_cp = comp.clone(); [INFO] [stdout] | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_comp_cp` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/day5.rs:14:9 [INFO] [stdout] | [INFO] [stdout] 14 | let mut comp_cp = comp.clone(); [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: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `prev` [INFO] [stdout] --> src/bin/day15.rs:86:26 [INFO] [stdout] | [INFO] [stdout] 86 | while let Some((coord, prev)) = queue.pop_front() { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_prev` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `coord` [INFO] [stdout] --> src/bin/day15.rs:144:38 [INFO] [stdout] | [INFO] [stdout] 144 | let target = map.iter().filter(|(coord, typ)| **typ == 2).collect::>(); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_coord` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/day15.rs:141:9 [INFO] [stdout] | [INFO] [stdout] 141 | let mut start = Coord {x:0, y:0}; [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: struct is never constructed: `Move` [INFO] [stdout] --> src/bin/day15.rs:13:8 [INFO] [stdout] | [INFO] [stdout] 13 | struct Move { [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `comp_cp` [INFO] [stdout] --> src/bin/day5.rs:14:9 [INFO] [stdout] | [INFO] [stdout] 14 | let mut comp_cp = comp.clone(); [INFO] [stdout] | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_comp_cp` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/day5.rs:14:9 [INFO] [stdout] | [INFO] [stdout] 14 | let mut comp_cp = comp.clone(); [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: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> src/bin/day3-2.rs:18:13 [INFO] [stdout] | [INFO] [stdout] 18 | for i in 0..len { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 9.29s [INFO] running `Command { std: "docker" "inspect" "320fecd03bb88aa669d1a64045bd0565c64380d0c492dd152e103e53516446ef", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "320fecd03bb88aa669d1a64045bd0565c64380d0c492dd152e103e53516446ef", kill_on_drop: false }` [INFO] [stdout] 320fecd03bb88aa669d1a64045bd0565c64380d0c492dd152e103e53516446ef