[INFO] cloning repository https://github.com/pengfeixx/catlog
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pengfeixx/catlog" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpengfeixx%2Fcatlog", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpengfeixx%2Fcatlog'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 07838e92583dade10e72ba91ef03707b8cce91eb
[INFO] checking pengfeixx/catlog against master#bca37a20bd376ce3fd138e7cdee7fe704e0f8814 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpengfeixx%2Fcatlog" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/pengfeixx/catlog
[INFO] finished tweaking git repo https://github.com/pengfeixx/catlog
[INFO] tweaked toml for git repo https://github.com/pengfeixx/catlog written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/pengfeixx/catlog on toolchain bca37a20bd376ce3fd138e7cdee7fe704e0f8814
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/pengfeixx/catlog 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" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 18 packages to latest compatible versions
[INFO] [stderr]       Adding cfg-if v0.1.10
[INFO] [stderr]       Adding fsevent v0.4.0
[INFO] [stderr]  Downgrading fsevent-sys v4.1.0 -> v2.0.1
[INFO] [stderr]       Adding fuchsia-zircon v0.3.3
[INFO] [stderr]       Adding fuchsia-zircon-sys v0.3.3
[INFO] [stderr]  Downgrading inotify v0.9.6 -> v0.7.1
[INFO] [stderr]       Adding iovec v0.1.4
[INFO] [stderr]       Adding kernel32-sys v0.2.2
[INFO] [stderr]       Adding lazycell v1.3.0
[INFO] [stderr]  Downgrading mio v0.8.8 -> v0.6.23
[INFO] [stderr]       Adding mio-extras v2.0.6
[INFO] [stderr]       Adding miow v0.2.2
[INFO] [stderr]       Adding net2 v0.2.39
[INFO] [stderr]  Downgrading notify v6.1.0 -> v4.0.18 (available: v8.2.0)
[INFO] [stderr]       Adding slab v0.4.11
[INFO] [stderr]       Adding winapi v0.2.8
[INFO] [stderr]       Adding winapi-build v0.1.1
[INFO] [stderr]       Adding ws2_32-sys v0.2.1
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded notify v4.0.18
[INFO] [stderr]   Downloaded termion v2.0.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 630337691b370744503e78645de870c27d6759b3a8ba96a4e21a59579bdafcbb
[INFO] running `Command { std: "docker" "start" "-a" "630337691b370744503e78645de870c27d6759b3a8ba96a4e21a59579bdafcbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "630337691b370744503e78645de870c27d6759b3a8ba96a4e21a59579bdafcbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "630337691b370744503e78645de870c27d6759b3a8ba96a4e21a59579bdafcbb", kill_on_drop: false }`
[INFO] [stdout] 630337691b370744503e78645de870c27d6759b3a8ba96a4e21a59579bdafcbb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 388f041c951304919c74ef17d332261bf097bff6ed9f025a9c1c0c64d3f6d8fd
[INFO] running `Command { std: "docker" "start" "-a" "388f041c951304919c74ef17d332261bf097bff6ed9f025a9c1c0c64d3f6d8fd", kill_on_drop: false }`
[INFO] [stderr]     Checking slab v0.4.11
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking numtoa v0.1.0
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking termion v2.0.1
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking mio-extras v2.0.6
[INFO] [stderr]     Checking notify v4.0.18
[INFO] [stderr]     Checking catlog v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Stdout`
[INFO] [stdout]  --> src/main.rs:7:46
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::io::{BufRead, stdin, stdout, Write, Stdout};
[INFO] [stdout]   |                                              ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::process::Output`
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::process::Output;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `App` and `Arg`
[INFO] [stdout]   --> src/main.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | use clap::{Arg, App};
[INFO] [stdout]    |            ^^^  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/main.rs:80:32
[INFO] [stdout]    |
[INFO] [stdout] 80 | ...                   if (current_lines.len() > size) {
[INFO] [stdout]    |                          ^                          ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 80 -                             if (current_lines.len() > size) {
[INFO] [stdout] 80 +                             if current_lines.len() > size  {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around closure body
[INFO] [stdout]    --> src/main.rs:203:59
[INFO] [stdout]     |
[INFO] [stdout] 203 |     for (i, _line) in lines.iter().enumerate().filter(|x| (x.0 > *current_index)) {
[INFO] [stdout]     |                                                           ^                    ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 203 -     for (i, _line) in lines.iter().enumerate().filter(|x| (x.0 > *current_index)) {
[INFO] [stdout] 203 +     for (i, _line) in lines.iter().enumerate().filter(|x| x.0 > *current_index ) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Stdout`
[INFO] [stdout]  --> src/main.rs:7:46
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::io::{BufRead, stdin, stdout, Write, Stdout};
[INFO] [stdout]   |                                              ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::process::Output`
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::process::Output;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `App` and `Arg`
[INFO] [stdout]   --> src/main.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | use clap::{Arg, App};
[INFO] [stdout]    |            ^^^  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/main.rs:80:32
[INFO] [stdout]    |
[INFO] [stdout] 80 | ...                   if (current_lines.len() > size) {
[INFO] [stdout]    |                          ^                          ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 80 -                             if (current_lines.len() > size) {
[INFO] [stdout] 80 +                             if current_lines.len() > size  {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around closure body
[INFO] [stdout]    --> src/main.rs:203:59
[INFO] [stdout]     |
[INFO] [stdout] 203 |     for (i, _line) in lines.iter().enumerate().filter(|x| (x.0 > *current_index)) {
[INFO] [stdout]     |                                                           ^                    ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 203 -     for (i, _line) in lines.iter().enumerate().filter(|x| (x.0 > *current_index)) {
[INFO] [stdout] 203 +     for (i, _line) in lines.iter().enumerate().filter(|x| x.0 > *current_index ) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `width`
[INFO] [stdout]   --> src/main.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let width = term_w as usize;
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_width`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `handle`
[INFO] [stdout]   --> src/main.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let handle = thread::spawn(move || {
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_handle`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `out_type` is never read
[INFO] [stdout]    --> src/main.rs:110:37
[INFO] [stdout]     |
[INFO] [stdout] 110 |         let mut out_type: OutType = OutType::Normal;
[INFO] [stdout]     |                                     ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `term_w`
[INFO] [stdout]    --> src/main.rs:161:18
[INFO] [stdout]     |
[INFO] [stdout] 161 |     let (term_h, term_w) = term.size();
[INFO] [stdout]     |                  ^^^^^^ help: if this is intentional, prefix it with an underscore: `_term_w`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `out_type` is never read
[INFO] [stdout]    --> src/main.rs:170:37
[INFO] [stdout]     |
[INFO] [stdout] 170 |         let mut out_type: OutType = OutType::Normal;
[INFO] [stdout]     |                                     ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:182:9
[INFO] [stdout]     |
[INFO] [stdout] 182 |     let mut stdout = stdout().into_raw_mode().unwrap();
[INFO] [stdout]     |         ----^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stdout`
[INFO] [stdout]    --> src/main.rs:182:9
[INFO] [stdout]     |
[INFO] [stdout] 182 |     let mut stdout = stdout().into_raw_mode().unwrap();
[INFO] [stdout]     |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_stdout`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `term_w`
[INFO] [stdout]    --> src/main.rs:183:18
[INFO] [stdout]     |
[INFO] [stdout] 183 |     let (term_h, term_w) = term.size();
[INFO] [stdout]     |                  ^^^^^^ help: if this is intentional, prefix it with an underscore: `_term_w`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `term_w`
[INFO] [stdout]    --> src/main.rs:212:22
[INFO] [stdout]     |
[INFO] [stdout] 212 |         let (term_h, term_w) = term.size();
[INFO] [stdout]     |                      ^^^^^^ help: if this is intentional, prefix it with an underscore: `_term_w`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]    --> src/main.rs:227:18
[INFO] [stdout]     |
[INFO] [stdout] 227 | fn find_previous(s: &&str, current_index: &mut usize, lines: &mut Vec<&str>) {
[INFO] [stdout]     |                  ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `current_index`
[INFO] [stdout]    --> src/main.rs:227:28
[INFO] [stdout]     |
[INFO] [stdout] 227 | fn find_previous(s: &&str, current_index: &mut usize, lines: &mut Vec<&str>) {
[INFO] [stdout]     |                            ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_current_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lines`
[INFO] [stdout]    --> src/main.rs:227:55
[INFO] [stdout]     |
[INFO] [stdout] 227 | fn find_previous(s: &&str, current_index: &mut usize, lines: &mut Vec<&str>) {
[INFO] [stdout]     |                                                       ^^^^^ help: if this is intentional, prefix it with an underscore: `_lines`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_lines` is never used
[INFO] [stdout]    --> src/main.rs:152:4
[INFO] [stdout]     |
[INFO] [stdout] 152 | fn read_lines<P>(filename: P) -> io::Result<io::Lines<io::BufReader<File>>>
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `find_previous` is never used
[INFO] [stdout]    --> src/main.rs:227:4
[INFO] [stdout]     |
[INFO] [stdout] 227 | fn find_previous(s: &&str, current_index: &mut usize, lines: &mut Vec<&str>) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `width`
[INFO] [stdout]   --> src/main.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let width = term_w as usize;
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_width`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `handle`
[INFO] [stdout]   --> src/main.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let handle = thread::spawn(move || {
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_handle`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `out_type` is never read
[INFO] [stdout]    --> src/main.rs:110:37
[INFO] [stdout]     |
[INFO] [stdout] 110 |         let mut out_type: OutType = OutType::Normal;
[INFO] [stdout]     |                                     ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `term_w`
[INFO] [stdout]    --> src/main.rs:161:18
[INFO] [stdout]     |
[INFO] [stdout] 161 |     let (term_h, term_w) = term.size();
[INFO] [stdout]     |                  ^^^^^^ help: if this is intentional, prefix it with an underscore: `_term_w`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `out_type` is never read
[INFO] [stdout]    --> src/main.rs:170:37
[INFO] [stdout]     |
[INFO] [stdout] 170 |         let mut out_type: OutType = OutType::Normal;
[INFO] [stdout]     |                                     ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:182:9
[INFO] [stdout]     |
[INFO] [stdout] 182 |     let mut stdout = stdout().into_raw_mode().unwrap();
[INFO] [stdout]     |         ----^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stdout`
[INFO] [stdout]    --> src/main.rs:182:9
[INFO] [stdout]     |
[INFO] [stdout] 182 |     let mut stdout = stdout().into_raw_mode().unwrap();
[INFO] [stdout]     |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_stdout`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `term_w`
[INFO] [stdout]    --> src/main.rs:183:18
[INFO] [stdout]     |
[INFO] [stdout] 183 |     let (term_h, term_w) = term.size();
[INFO] [stdout]     |                  ^^^^^^ help: if this is intentional, prefix it with an underscore: `_term_w`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `term_w`
[INFO] [stdout]    --> src/main.rs:212:22
[INFO] [stdout]     |
[INFO] [stdout] 212 |         let (term_h, term_w) = term.size();
[INFO] [stdout]     |                      ^^^^^^ help: if this is intentional, prefix it with an underscore: `_term_w`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]    --> src/main.rs:227:18
[INFO] [stdout]     |
[INFO] [stdout] 227 | fn find_previous(s: &&str, current_index: &mut usize, lines: &mut Vec<&str>) {
[INFO] [stdout]     |                  ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `current_index`
[INFO] [stdout]    --> src/main.rs:227:28
[INFO] [stdout]     |
[INFO] [stdout] 227 | fn find_previous(s: &&str, current_index: &mut usize, lines: &mut Vec<&str>) {
[INFO] [stdout]     |                            ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_current_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lines`
[INFO] [stdout]    --> src/main.rs:227:55
[INFO] [stdout]     |
[INFO] [stdout] 227 | fn find_previous(s: &&str, current_index: &mut usize, lines: &mut Vec<&str>) {
[INFO] [stdout]     |                                                       ^^^^^ help: if this is intentional, prefix it with an underscore: `_lines`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_lines` is never used
[INFO] [stdout]    --> src/main.rs:152:4
[INFO] [stdout]     |
[INFO] [stdout] 152 | fn read_lines<P>(filename: P) -> io::Result<io::Lines<io::BufReader<File>>>
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `find_previous` is never used
[INFO] [stdout]    --> src/main.rs:227:4
[INFO] [stdout]     |
[INFO] [stdout] 227 | fn find_previous(s: &&str, current_index: &mut usize, lines: &mut Vec<&str>) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.38s
[INFO] running `Command { std: "docker" "inspect" "388f041c951304919c74ef17d332261bf097bff6ed9f025a9c1c0c64d3f6d8fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "388f041c951304919c74ef17d332261bf097bff6ed9f025a9c1c0c64d3f6d8fd", kill_on_drop: false }`
[INFO] [stdout] 388f041c951304919c74ef17d332261bf097bff6ed9f025a9c1c0c64d3f6d8fd
