[INFO] cloning repository https://github.com/Carinthorn/Rust_hw3
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Carinthorn/Rust_hw3" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCarinthorn%2FRust_hw3", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCarinthorn%2FRust_hw3'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 00811ac6a0bdf089489869c90c2bfc889b1ce723
[INFO] checking Carinthorn/Rust_hw3 against master#0f442e265c165c0a78633bef98de18517815150c for pr-129073-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCarinthorn%2FRust_hw3" "/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/Carinthorn/Rust_hw3 on toolchain 0f442e265c165c0a78633bef98de18517815150c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0f442e265c165c0a78633bef98de18517815150c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Carinthorn/Rust_hw3
[INFO] finished tweaking git repo https://github.com/Carinthorn/Rust_hw3
[INFO] tweaked toml for git repo https://github.com/Carinthorn/Rust_hw3 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Carinthorn/Rust_hw3 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" "+0f442e265c165c0a78633bef98de18517815150c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded termtree v0.4.1
[INFO] [stderr]   Downloaded predicates v3.0.3
[INFO] [stderr]   Downloaded either v1.9.0
[INFO] [stderr]   Downloaded anstyle v1.0.1
[INFO] [stderr]   Downloaded assert_cmd v2.0.12
[INFO] [stderr]   Downloaded bstr v1.6.0
[INFO] [stderr]   Downloaded memchr v2.5.0
[INFO] [stderr]   Downloaded itertools v0.10.5
[INFO] [stderr]   Downloaded libc v0.2.147
[INFO] [stderr]   Downloaded doc-comment v0.3.3
[INFO] [stderr]   Downloaded wait-timeout v0.2.0
[INFO] [stderr]   Downloaded predicates-core v1.0.6
[INFO] [stderr]   Downloaded predicates-tree v1.0.9
[INFO] [stderr]   Downloaded difflib v0.4.0
[INFO] [stderr]   Downloaded serde v1.0.174
[INFO] [stderr]   Downloaded regex-automata v0.3.3
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+0f442e265c165c0a78633bef98de18517815150c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] df886dc47177bca92e086f0d43a2ad907e177cd1b2607253932fea45a5e90944
[INFO] running `Command { std: "docker" "start" "-a" "df886dc47177bca92e086f0d43a2ad907e177cd1b2607253932fea45a5e90944", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "df886dc47177bca92e086f0d43a2ad907e177cd1b2607253932fea45a5e90944", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df886dc47177bca92e086f0d43a2ad907e177cd1b2607253932fea45a5e90944", kill_on_drop: false }`
[INFO] [stdout] df886dc47177bca92e086f0d43a2ad907e177cd1b2607253932fea45a5e90944
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+0f442e265c165c0a78633bef98de18517815150c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9fb5fb95deca71e8f15c7e5d1438afeb97e4738182932312467447011e6ccc71
[INFO] running `Command { std: "docker" "start" "-a" "9fb5fb95deca71e8f15c7e5d1438afeb97e4738182932312467447011e6ccc71", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking either v1.9.0
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]     Checking predicates-core v1.0.6
[INFO] [stderr]     Checking difflib v0.4.0
[INFO] [stderr]     Checking anstyle v1.0.1
[INFO] [stderr]     Checking regex-automata v0.3.3
[INFO] [stderr]     Checking termtree v0.4.1
[INFO] [stderr]     Checking new_file v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/bin/arrow2.rs:17:17
[INFO] [stdout]    |
[INFO] [stdout] 17 |             for j in 0..(i - dot + 1){ 
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/bin/arrow2.rs:20:17
[INFO] [stdout]    |
[INFO] [stdout] 20 |             for n in (0..(dot*2 - i - 1)).rev(){  
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/bin/arrow2.rs:25:17
[INFO] [stdout]    |
[INFO] [stdout] 25 |             for j in 0..(dot - 1 - i){ 
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/bin/arrow2.rs:28:17
[INFO] [stdout]    |
[INFO] [stdout] 28 |             for n in 0..(i+1){
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking predicates-tree v1.0.9
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/bin/arrow.rs:14:17
[INFO] [stdout]    |
[INFO] [stdout] 14 |             for n in (1..=(line*2-(i))).rev(){
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/bin/arrow.rs:22:17
[INFO] [stdout]    |
[INFO] [stdout] 22 |             for j in 1..(i+1){
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking bstr v1.6.0
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking predicates v3.0.3
[INFO] [stderr]     Checking assert_cmd v2.0.12
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/bin/arrow.rs:14:17
[INFO] [stdout]    |
[INFO] [stdout] 14 |             for n in (1..=(line*2-(i))).rev(){
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/bin/arrow2.rs:17:17
[INFO] [stdout]    |
[INFO] [stdout] 17 |             for j in 0..(i - dot + 1){ 
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/bin/arrow.rs:22:17
[INFO] [stdout]    |
[INFO] [stdout] 22 |             for j in 1..(i+1){
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/bin/arrow2.rs:20:17
[INFO] [stdout]    |
[INFO] [stdout] 20 |             for n in (0..(dot*2 - i - 1)).rev(){  
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/bin/arrow2.rs:25:17
[INFO] [stdout]    |
[INFO] [stdout] 25 |             for j in 0..(dot - 1 - i){ 
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/bin/arrow2.rs:28:17
[INFO] [stdout]    |
[INFO] [stdout] 28 |             for n in 0..(i+1){
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.68s
[INFO] running `Command { std: "docker" "inspect" "9fb5fb95deca71e8f15c7e5d1438afeb97e4738182932312467447011e6ccc71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9fb5fb95deca71e8f15c7e5d1438afeb97e4738182932312467447011e6ccc71", kill_on_drop: false }`
[INFO] [stdout] 9fb5fb95deca71e8f15c7e5d1438afeb97e4738182932312467447011e6ccc71
[INFO] checking Carinthorn/Rust_hw3 against try#774bd5ba31b89dab12d58c29690ad9f7e5c9f063 for pr-129073-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCarinthorn%2FRust_hw3" "/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/Carinthorn/Rust_hw3 on toolchain 774bd5ba31b89dab12d58c29690ad9f7e5c9f063
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+774bd5ba31b89dab12d58c29690ad9f7e5c9f063" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Carinthorn/Rust_hw3
[INFO] finished tweaking git repo https://github.com/Carinthorn/Rust_hw3
[INFO] tweaked toml for git repo https://github.com/Carinthorn/Rust_hw3 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Carinthorn/Rust_hw3 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" "+774bd5ba31b89dab12d58c29690ad9f7e5c9f063" "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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+774bd5ba31b89dab12d58c29690ad9f7e5c9f063" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ddabfa6d63eaa718807f8fa487f03ac4a3e6545f75eca6eb91fc53d0bb0ba3c1
[INFO] running `Command { std: "docker" "start" "-a" "ddabfa6d63eaa718807f8fa487f03ac4a3e6545f75eca6eb91fc53d0bb0ba3c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ddabfa6d63eaa718807f8fa487f03ac4a3e6545f75eca6eb91fc53d0bb0ba3c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ddabfa6d63eaa718807f8fa487f03ac4a3e6545f75eca6eb91fc53d0bb0ba3c1", kill_on_drop: false }`
[INFO] [stdout] ddabfa6d63eaa718807f8fa487f03ac4a3e6545f75eca6eb91fc53d0bb0ba3c1
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+774bd5ba31b89dab12d58c29690ad9f7e5c9f063" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7ebe09931dc8224e305e1b025444e395513907c29b1eee38b20a511dc098ca52
[INFO] running `Command { std: "docker" "start" "-a" "7ebe09931dc8224e305e1b025444e395513907c29b1eee38b20a511dc098ca52", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking predicates-core v1.0.6
[INFO] [stderr]     Checking either v1.9.0
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]     Checking termtree v0.4.1
[INFO] [stderr]     Checking difflib v0.4.0
[INFO] [stderr]     Checking anstyle v1.0.1
[INFO] [stderr]     Checking regex-automata v0.3.3
[INFO] [stderr]     Checking predicates-tree v1.0.9
[INFO] [stderr]     Checking new_file v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/bin/arrow2.rs:17:17
[INFO] [stdout]    |
[INFO] [stdout] 17 |             for j in 0..(i - dot + 1){ 
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/bin/arrow2.rs:20:17
[INFO] [stdout]    |
[INFO] [stdout] 20 |             for n in (0..(dot*2 - i - 1)).rev(){  
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/bin/arrow2.rs:25:17
[INFO] [stdout]    |
[INFO] [stdout] 25 |             for j in 0..(dot - 1 - i){ 
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/bin/arrow2.rs:28:17
[INFO] [stdout]    |
[INFO] [stdout] 28 |             for n in 0..(i+1){
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/bin/arrow.rs:14:17
[INFO] [stdout]    |
[INFO] [stdout] 14 |             for n in (1..=(line*2-(i))).rev(){
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/bin/arrow.rs:22:17
[INFO] [stdout]    |
[INFO] [stdout] 22 |             for j in 1..(i+1){
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking bstr v1.6.0
[INFO] [stderr]     Checking predicates v3.0.3
[INFO] [stderr]     Checking assert_cmd v2.0.12
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/bin/arrow.rs:14:17
[INFO] [stdout]    |
[INFO] [stdout] 14 |             for n in (1..=(line*2-(i))).rev(){
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/bin/arrow.rs:22:17
[INFO] [stdout]    |
[INFO] [stdout] 22 |             for j in 1..(i+1){
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/bin/arrow2.rs:17:17
[INFO] [stdout]    |
[INFO] [stdout] 17 |             for j in 0..(i - dot + 1){ 
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/bin/arrow2.rs:20:17
[INFO] [stdout]    |
[INFO] [stdout] 20 |             for n in (0..(dot*2 - i - 1)).rev(){  
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/bin/arrow2.rs:25:17
[INFO] [stdout]    |
[INFO] [stdout] 25 |             for j in 0..(dot - 1 - i){ 
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/bin/arrow2.rs:28:17
[INFO] [stdout]    |
[INFO] [stdout] 28 |             for n in 0..(i+1){
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.97s
[INFO] running `Command { std: "docker" "inspect" "7ebe09931dc8224e305e1b025444e395513907c29b1eee38b20a511dc098ca52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ebe09931dc8224e305e1b025444e395513907c29b1eee38b20a511dc098ca52", kill_on_drop: false }`
[INFO] [stdout] 7ebe09931dc8224e305e1b025444e395513907c29b1eee38b20a511dc098ca52