[INFO] cloning repository https://github.com/HalenB-code/rust-1brc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/HalenB-code/rust-1brc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHalenB-code%2Frust-1brc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHalenB-code%2Frust-1brc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9043893c819a53eca62da3945a7eb5c63bb5e16c
[INFO] checking HalenB-code/rust-1brc against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHalenB-code%2Frust-1brc" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/HalenB-code/rust-1brc
[INFO] finished tweaking git repo https://github.com/HalenB-code/rust-1brc
[INFO] tweaked toml for git repo https://github.com/HalenB-code/rust-1brc written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/HalenB-code/rust-1brc on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/HalenB-code/rust-1brc 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bbd87af8f04e9c5a22e76479d3b126bbebddd5c12cae3b860d7e1038829ebf77
[INFO] running `Command { std: "docker" "start" "-a" "bbd87af8f04e9c5a22e76479d3b126bbebddd5c12cae3b860d7e1038829ebf77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bbd87af8f04e9c5a22e76479d3b126bbebddd5c12cae3b860d7e1038829ebf77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbd87af8f04e9c5a22e76479d3b126bbebddd5c12cae3b860d7e1038829ebf77", kill_on_drop: false }`
[INFO] [stdout] bbd87af8f04e9c5a22e76479d3b126bbebddd5c12cae3b860d7e1038829ebf77
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d8537fd0e357920867053ea304f6825d8a1964169b7f377ad47564bb2c78923b
[INFO] running `Command { std: "docker" "start" "-a" "d8537fd0e357920867053ea304f6825d8a1964169b7f377ad47564bb2c78923b", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.200
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]     Checking ryu v1.0.17
[INFO] [stderr]     Checking memmap2 v0.9.4
[INFO] [stderr]     Checking csv-core v0.1.11
[INFO] [stderr]     Checking csv v1.3.0
[INFO] [stderr]     Checking rust-1brc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `prelude::*` and `self`
[INFO] [stdout]  --> src/main.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::{self, prelude::*, BufReader};
[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::collections::BTreeMap`
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::collections::BTreeMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Duration`
[INFO] [stdout]  --> src/main.rs:4:17
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::time::{Duration, Instant};
[INFO] [stdout]   |                 ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `MmapOptions`
[INFO] [stdout]  --> src/main.rs:7:21
[INFO] [stdout]   |
[INFO] [stdout] 7 | use memmap2::{Mmap, MmapOptions};
[INFO] [stdout]   |                     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str`
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::str;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line_count`
[INFO] [stdout]   --> src/main.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |     let line_count = Arc::clone(&no_crlf);
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_line_count`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `start_pos` is never read
[INFO] [stdout]   --> src/main.rs:67:32
[INFO] [stdout]    |
[INFO] [stdout] 67 |     let mut start_pos: usize = 0;
[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: value assigned to `start_pos` is never read
[INFO] [stdout]   --> src/main.rs:88:7
[INFO] [stdout]    |
[INFO] [stdout] 88 |       start_pos += thread_mmap.len();
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line_count`
[INFO] [stdout]   --> src/main.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |     let line_count = Arc::clone(&no_crlf);
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_line_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::error::Error`
[INFO] [stdout]  --> src/bin/bin2.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::error::Error;
[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: `self`
[INFO] [stdout]  --> src/bin/bin2.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::{self, prelude::*};
[INFO] [stdout]   |               ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `start_pos` is never read
[INFO] [stdout]   --> src/main.rs:28:32
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let mut start_pos: usize = 0;
[INFO] [stdout]    |                                ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `start_pos` is never read
[INFO] [stdout]   --> src/main.rs:49:7
[INFO] [stdout]    |
[INFO] [stdout] 49 |       start_pos += thread_mmap.len();
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reader`
[INFO] [stdout]   --> src/main.rs:16:7
[INFO] [stdout]    |
[INFO] [stdout] 16 |   let reader = BufReader::new(&file);
[INFO] [stdout]    |       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_reader`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/main.rs:54:40
[INFO] [stdout]    |
[INFO] [stdout] 54 |         *line_count.lock().unwrap() += <usize as TryInto<usize>>::try_into(thread_mmap.iter().filter(|x| **x == 10).count()).unwrap();
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-1brc` (bin "rust-1brc") due to 1 previous error; 12 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/bin2.rs:22:7
[INFO] [stdout]    |
[INFO] [stdout] 22 |   let mut hashmap_container: Arc<Mutex<Vec<BTreeMap<String, (i32, i64, i64, i64)>>>> = Arc::new(Mutex::new(Vec::with_capacity(n_threads *...
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/bin2.rs:23:7
[INFO] [stdout]    |
[INFO] [stdout] 23 |   let mut summarised_data: BTreeMap<String, (i32, i64, i64, i64)> = BTreeMap::new();
[INFO] [stdout]    |       ----^^^^^^^^^^^^^^^
[INFO] [stdout]    |       |
[INFO] [stdout]    |       help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]   --> src/bin/bin2.rs:15:7
[INFO] [stdout]    |
[INFO] [stdout] 15 |   let start = Instant::now();
[INFO] [stdout]    |       ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hashmap_container`
[INFO] [stdout]   --> src/bin/bin2.rs:22:7
[INFO] [stdout]    |
[INFO] [stdout] 22 |   let mut hashmap_container: Arc<Mutex<Vec<BTreeMap<String, (i32, i64, i64, i64)>>>> = Arc::new(Mutex::new(Vec::with_capacity(n_threads *...
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_hashmap_container`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `summarised_data`
[INFO] [stdout]   --> src/bin/bin2.rs:23:7
[INFO] [stdout]    |
[INFO] [stdout] 23 |   let mut summarised_data: BTreeMap<String, (i32, i64, i64, i64)> = BTreeMap::new();
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_summarised_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `duration`
[INFO] [stdout]   --> src/bin/bin2.rs:46:7
[INFO] [stdout]    |
[INFO] [stdout] 46 |   let duration = start.elapsed();
[INFO] [stdout]    |       ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_duration`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line_count`
[INFO] [stdout]    --> src/bin/bin2.rs:171:9
[INFO] [stdout]     |
[INFO] [stdout] 171 |     let line_count = Arc::clone(&no_crlf);
[INFO] [stdout]     |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_line_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `start_pos` is never read
[INFO] [stdout]    --> src/bin/bin2.rs:163:32
[INFO] [stdout]     |
[INFO] [stdout] 163 |     let mut start_pos: usize = 0;
[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: value assigned to `start_pos` is never read
[INFO] [stdout]    --> src/bin/bin2.rs:184:7
[INFO] [stdout]     |
[INFO] [stdout] 184 |       start_pos += thread_mmap.len();
[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/bin/bin2.rs:290:13
[INFO] [stdout]     |
[INFO] [stdout] 290 |         let mut raw_byte_data_arc = &raw_byte_data[start_pos..end_pos];
[INFO] [stdout]     |             ----^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]    --> src/bin/bin2.rs:269:11
[INFO] [stdout]     |
[INFO] [stdout] 269 |       let start = Instant::now();
[INFO] [stdout]     |           ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]    --> src/bin/bin2.rs:274:13
[INFO] [stdout]     |
[INFO] [stdout] 274 |         let start = Instant::now();
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `start_pos` is never read
[INFO] [stdout]    --> src/bin/bin2.rs:270:34
[INFO] [stdout]     |
[INFO] [stdout] 270 |       let mut start_pos: usize = 0;
[INFO] [stdout]     |                                  ^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `write_to_file_testing` is never used
[INFO] [stdout]   --> src/bin/bin2.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn write_to_file_testing(vector: &[Vec<u8>], iter_ref: usize) -> std::io::Result<()> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::error::Error`
[INFO] [stdout]  --> src/bin/bin4.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::error::Error;
[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: `HashMap`
[INFO] [stdout]  --> src/bin/bin4.rs:4:34
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::collections::{BTreeMap, HashMap};
[INFO] [stdout]   |                                  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/bin/bin4.rs:169:13
[INFO] [stdout]     |
[INFO] [stdout] 169 |         let mut thread_index_start = start_pos;
[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: variable does not need to be mutable
[INFO] [stdout]    --> src/bin/bin4.rs:149:11
[INFO] [stdout]     |
[INFO] [stdout] 149 |       let mut mmap_positions_temp: Arc<Mutex<BTreeMap<usize, (usize, usize)>>> = Arc::clone(&mmap_positions);
[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/bin4.rs:129:7
[INFO] [stdout]     |
[INFO] [stdout] 129 |   let mut hashmap_container: Arc<Mutex<Vec<BTreeMap<String, (i64, f64, f64, f64)>>>> = Arc::new(Mutex::new(Vec::with_capacity(n_threads)));
[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/bin4.rs:141:7
[INFO] [stdout]     |
[INFO] [stdout] 141 |   let mut mmap_positions: Arc<Mutex<BTreeMap<usize, (usize, usize)>>> = Arc::new(Mutex::new(BTreeMap::new()));
[INFO] [stdout]     |       ----^^^^^^^^^^^^^^
[INFO] [stdout]     |       |
[INFO] [stdout]     |       help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `thread_index_start`
[INFO] [stdout]    --> src/bin/bin4.rs:169:13
[INFO] [stdout]     |
[INFO] [stdout] 169 |         let mut thread_index_start = start_pos;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_thread_index_start`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start_master`
[INFO] [stdout]    --> src/bin/bin4.rs:123:7
[INFO] [stdout]     |
[INFO] [stdout] 123 |   let start_master = Instant::now();
[INFO] [stdout]     |       ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_start_master`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start_thread`
[INFO] [stdout]    --> src/bin/bin4.rs:201:7
[INFO] [stdout]     |
[INFO] [stdout] 201 |   let start_thread = Instant::now();
[INFO] [stdout]     |       ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_start_thread`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `duration`
[INFO] [stdout]    --> src/bin/bin4.rs:289:9
[INFO] [stdout]     |
[INFO] [stdout] 289 |     let duration = start.elapsed();
[INFO] [stdout]     |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_duration`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::error::Error`
[INFO] [stdout]  --> src/bin/bin4.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::error::Error;
[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: `HashMap`
[INFO] [stdout]  --> src/bin/bin4.rs:4:34
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::collections::{BTreeMap, HashMap};
[INFO] [stdout]   |                                  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `prelude::*` and `self`
[INFO] [stdout]  --> src/main.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::{self, prelude::*, BufReader};
[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::collections::BTreeMap`
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::collections::BTreeMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Duration`
[INFO] [stdout]  --> src/main.rs:4:17
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::time::{Duration, Instant};
[INFO] [stdout]   |                 ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `MmapOptions`
[INFO] [stdout]  --> src/main.rs:7:21
[INFO] [stdout]   |
[INFO] [stdout] 7 | use memmap2::{Mmap, MmapOptions};
[INFO] [stdout]   |                     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str`
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::str;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::error::Error`
[INFO] [stdout]  --> src/bin/bin2.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::error::Error;
[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: `self`
[INFO] [stdout]  --> src/bin/bin2.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::{self, prelude::*};
[INFO] [stdout]   |               ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `duration`
[INFO] [stdout]   --> src/bin/bin1.rs:24:7
[INFO] [stdout]    |
[INFO] [stdout] 24 |   let duration = start.elapsed();
[INFO] [stdout]    |       ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_duration`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/bin1.rs:38:7
[INFO] [stdout]    |
[INFO] [stdout] 38 |   let mut hashmap_container: Arc<Mutex<Vec<BTreeMap<String, (i32, i64, i64, i64)>>>> = Arc::new(Mutex::new(Vec::with_capacity(n_threads *...
[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: variable does not need to be mutable
[INFO] [stdout]    --> src/bin/bin1.rs:131:9
[INFO] [stdout]     |
[INFO] [stdout] 131 |     let mut start_pos: usize = 0;
[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/bin1.rs:132:9
[INFO] [stdout]     |
[INFO] [stdout] 132 |     let mut end_pos: usize = 0;
[INFO] [stdout]     |         ----^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]    --> src/bin/bin1.rs:135:11
[INFO] [stdout]     |
[INFO] [stdout] 135 |       let start = Instant::now();
[INFO] [stdout]     |           ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]    --> src/bin/bin1.rs:140:13
[INFO] [stdout]     |
[INFO] [stdout] 140 |         let start = Instant::now();
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `start_pos` is never read
[INFO] [stdout]    --> src/bin/bin1.rs:136:34
[INFO] [stdout]     |
[INFO] [stdout] 136 |       let mut start_pos: usize = 0;
[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: `line_count`
[INFO] [stdout]   --> src/bin/bin1.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let line_count = Arc::clone(&no_crlf);
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_line_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `start_pos` is never read
[INFO] [stdout]   --> src/bin/bin1.rs:51:32
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let mut start_pos: usize = 0;
[INFO] [stdout]    |                                ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `start_pos` is never read
[INFO] [stdout]   --> src/bin/bin1.rs:72:7
[INFO] [stdout]    |
[INFO] [stdout] 72 |       start_pos += thread_mmap.len();
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reader`
[INFO] [stdout]   --> src/bin/bin1.rs:43:7
[INFO] [stdout]    |
[INFO] [stdout] 43 |   let reader = BufReader::new(&file);
[INFO] [stdout]    |       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_reader`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start_pos`
[INFO] [stdout]    --> src/bin/bin1.rs:131:9
[INFO] [stdout]     |
[INFO] [stdout] 131 |     let mut start_pos: usize = 0;
[INFO] [stdout]     |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_start_pos`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `end_pos`
[INFO] [stdout]    --> src/bin/bin1.rs:132:9
[INFO] [stdout]     |
[INFO] [stdout] 132 |     let mut end_pos: usize = 0;
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_end_pos`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `duration`
[INFO] [stdout]   --> src/bin/bin1.rs:24:7
[INFO] [stdout]    |
[INFO] [stdout] 24 |   let duration = start.elapsed();
[INFO] [stdout]    |       ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_duration`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/bin2.rs:22:7
[INFO] [stdout]    |
[INFO] [stdout] 22 |   let mut hashmap_container: Arc<Mutex<Vec<BTreeMap<String, (i32, i64, i64, i64)>>>> = Arc::new(Mutex::new(Vec::with_capacity(n_threads *...
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/bin2.rs:23:7
[INFO] [stdout]    |
[INFO] [stdout] 23 |   let mut summarised_data: BTreeMap<String, (i32, i64, i64, i64)> = BTreeMap::new();
[INFO] [stdout]    |       ----^^^^^^^^^^^^^^^
[INFO] [stdout]    |       |
[INFO] [stdout]    |       help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]   --> src/bin/bin2.rs:15:7
[INFO] [stdout]    |
[INFO] [stdout] 15 |   let start = Instant::now();
[INFO] [stdout]    |       ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hashmap_container`
[INFO] [stdout]   --> src/bin/bin2.rs:22:7
[INFO] [stdout]    |
[INFO] [stdout] 22 |   let mut hashmap_container: Arc<Mutex<Vec<BTreeMap<String, (i32, i64, i64, i64)>>>> = Arc::new(Mutex::new(Vec::with_capacity(n_threads *...
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_hashmap_container`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `summarised_data`
[INFO] [stdout]   --> src/bin/bin2.rs:23:7
[INFO] [stdout]    |
[INFO] [stdout] 23 |   let mut summarised_data: BTreeMap<String, (i32, i64, i64, i64)> = BTreeMap::new();
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_summarised_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `duration`
[INFO] [stdout]   --> src/bin/bin2.rs:46:7
[INFO] [stdout]    |
[INFO] [stdout] 46 |   let duration = start.elapsed();
[INFO] [stdout]    |       ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_duration`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/bin1.rs:38:7
[INFO] [stdout]    |
[INFO] [stdout] 38 |   let mut hashmap_container: Arc<Mutex<Vec<BTreeMap<String, (i32, i64, i64, i64)>>>> = Arc::new(Mutex::new(Vec::with_capacity(n_threads *...
[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: variable does not need to be mutable
[INFO] [stdout]    --> src/bin/bin1.rs:131:9
[INFO] [stdout]     |
[INFO] [stdout] 131 |     let mut start_pos: usize = 0;
[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/bin1.rs:132:9
[INFO] [stdout]     |
[INFO] [stdout] 132 |     let mut end_pos: usize = 0;
[INFO] [stdout]     |         ----^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]    --> src/bin/bin1.rs:135:11
[INFO] [stdout]     |
[INFO] [stdout] 135 |       let start = Instant::now();
[INFO] [stdout]     |           ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]    --> src/bin/bin1.rs:140:13
[INFO] [stdout]     |
[INFO] [stdout] 140 |         let start = Instant::now();
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `start_pos` is never read
[INFO] [stdout]    --> src/bin/bin1.rs:136:34
[INFO] [stdout]     |
[INFO] [stdout] 136 |       let mut start_pos: usize = 0;
[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: `line_count`
[INFO] [stdout]   --> src/bin/bin1.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let line_count = Arc::clone(&no_crlf);
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_line_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `start_pos` is never read
[INFO] [stdout]   --> src/bin/bin1.rs:51:32
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let mut start_pos: usize = 0;
[INFO] [stdout]    |                                ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `start_pos` is never read
[INFO] [stdout]   --> src/bin/bin1.rs:72:7
[INFO] [stdout]    |
[INFO] [stdout] 72 |       start_pos += thread_mmap.len();
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reader`
[INFO] [stdout]   --> src/bin/bin1.rs:43:7
[INFO] [stdout]    |
[INFO] [stdout] 43 |   let reader = BufReader::new(&file);
[INFO] [stdout]    |       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_reader`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start_pos`
[INFO] [stdout]    --> src/bin/bin1.rs:131:9
[INFO] [stdout]     |
[INFO] [stdout] 131 |     let mut start_pos: usize = 0;
[INFO] [stdout]     |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_start_pos`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `end_pos`
[INFO] [stdout]    --> src/bin/bin1.rs:132:9
[INFO] [stdout]     |
[INFO] [stdout] 132 |     let mut end_pos: usize = 0;
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_end_pos`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line_count`
[INFO] [stdout]    --> src/bin/bin2.rs:171:9
[INFO] [stdout]     |
[INFO] [stdout] 171 |     let line_count = Arc::clone(&no_crlf);
[INFO] [stdout]     |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_line_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `start_pos` is never read
[INFO] [stdout]    --> src/bin/bin2.rs:163:32
[INFO] [stdout]     |
[INFO] [stdout] 163 |     let mut start_pos: usize = 0;
[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: value assigned to `start_pos` is never read
[INFO] [stdout]    --> src/bin/bin2.rs:184:7
[INFO] [stdout]     |
[INFO] [stdout] 184 |       start_pos += thread_mmap.len();
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line_count`
[INFO] [stdout]   --> src/main.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |     let line_count = Arc::clone(&no_crlf);
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_line_count`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `start_pos` is never read
[INFO] [stdout]   --> src/main.rs:67:32
[INFO] [stdout]    |
[INFO] [stdout] 67 |     let mut start_pos: usize = 0;
[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: value assigned to `start_pos` is never read
[INFO] [stdout]   --> src/main.rs:88:7
[INFO] [stdout]    |
[INFO] [stdout] 88 |       start_pos += thread_mmap.len();
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line_count`
[INFO] [stdout]   --> src/main.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |     let line_count = Arc::clone(&no_crlf);
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_line_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `start_pos` is never read
[INFO] [stdout]   --> src/main.rs:28:32
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let mut start_pos: usize = 0;
[INFO] [stdout]    |                                ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `start_pos` is never read
[INFO] [stdout]   --> src/main.rs:49:7
[INFO] [stdout]    |
[INFO] [stdout] 49 |       start_pos += thread_mmap.len();
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reader`
[INFO] [stdout]   --> src/main.rs:16:7
[INFO] [stdout]    |
[INFO] [stdout] 16 |   let reader = BufReader::new(&file);
[INFO] [stdout]    |       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_reader`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/bin/bin2.rs:290:13
[INFO] [stdout]     |
[INFO] [stdout] 290 |         let mut raw_byte_data_arc = &raw_byte_data[start_pos..end_pos];
[INFO] [stdout]     |             ----^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]    --> src/bin/bin2.rs:269:11
[INFO] [stdout]     |
[INFO] [stdout] 269 |       let start = Instant::now();
[INFO] [stdout]     |           ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]    --> src/bin/bin2.rs:274:13
[INFO] [stdout]     |
[INFO] [stdout] 274 |         let start = Instant::now();
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `start_pos` is never read
[INFO] [stdout]    --> src/bin/bin2.rs:270:34
[INFO] [stdout]     |
[INFO] [stdout] 270 |       let mut start_pos: usize = 0;
[INFO] [stdout]     |                                  ^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/main.rs:54:40
[INFO] [stdout]    |
[INFO] [stdout] 54 |         *line_count.lock().unwrap() += <usize as TryInto<usize>>::try_into(thread_mmap.iter().filter(|x| **x == 10).count()).unwrap();
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `write_to_file_testing` is never used
[INFO] [stdout]   --> src/bin/bin2.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn write_to_file_testing(vector: &[Vec<u8>], iter_ref: usize) -> std::io::Result<()> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-1brc` (bin "rust-1brc" test) due to 1 previous error; 12 warnings emitted
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/bin3.rs:37:7
[INFO] [stdout]    |
[INFO] [stdout] 37 |   let mut hashmap_container: Arc<Mutex<Vec<BTreeMap<String, (i32, i64, i64, i64)>>>> = Arc::new(Mutex::new(Vec::with_capacity(n_threads *...
[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: variable does not need to be mutable
[INFO] [stdout]    --> src/bin/bin3.rs:131:9
[INFO] [stdout]     |
[INFO] [stdout] 131 |     let mut start_pos: usize = 0;
[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/bin3.rs:132:9
[INFO] [stdout]     |
[INFO] [stdout] 132 |     let mut end_pos: usize = 0;
[INFO] [stdout]     |         ----^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]    --> src/bin/bin3.rs:135:11
[INFO] [stdout]     |
[INFO] [stdout] 135 |       let start = Instant::now();
[INFO] [stdout]     |           ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]    --> src/bin/bin3.rs:140:13
[INFO] [stdout]     |
[INFO] [stdout] 140 |         let start = Instant::now();
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `start_pos` is never read
[INFO] [stdout]    --> src/bin/bin3.rs:136:34
[INFO] [stdout]     |
[INFO] [stdout] 136 |       let mut start_pos: usize = 0;
[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: `line_count`
[INFO] [stdout]   --> src/bin/bin3.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |     let line_count = Arc::clone(&no_crlf);
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_line_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `start_pos` is never read
[INFO] [stdout]   --> src/bin/bin3.rs:50:32
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let mut start_pos: usize = 0;
[INFO] [stdout]    |                                ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `start_pos` is never read
[INFO] [stdout]   --> src/bin/bin3.rs:71:7
[INFO] [stdout]    |
[INFO] [stdout] 71 |       start_pos += thread_mmap.len();
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reader`
[INFO] [stdout]   --> src/bin/bin3.rs:42:7
[INFO] [stdout]    |
[INFO] [stdout] 42 |   let reader = BufReader::new(&file);
[INFO] [stdout]    |       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_reader`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start_pos`
[INFO] [stdout]    --> src/bin/bin3.rs:131:9
[INFO] [stdout]     |
[INFO] [stdout] 131 |     let mut start_pos: usize = 0;
[INFO] [stdout]     |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_start_pos`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `end_pos`
[INFO] [stdout]    --> src/bin/bin3.rs:132:9
[INFO] [stdout]     |
[INFO] [stdout] 132 |     let mut end_pos: usize = 0;
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_end_pos`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/bin/bin3.rs:76:40
[INFO] [stdout]    |
[INFO] [stdout] 76 |         *line_count.lock().unwrap() += <usize as TryInto<usize>>::try_into(thread_mmap.iter().filter(|x| **x == 10).count()).unwrap();
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/bin/bin4.rs:169:13
[INFO] [stdout]     |
[INFO] [stdout] 169 |         let mut thread_index_start = start_pos;
[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: variable does not need to be mutable
[INFO] [stdout]    --> src/bin/bin4.rs:149:11
[INFO] [stdout]     |
[INFO] [stdout] 149 |       let mut mmap_positions_temp: Arc<Mutex<BTreeMap<usize, (usize, usize)>>> = Arc::clone(&mmap_positions);
[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/bin4.rs:129:7
[INFO] [stdout]     |
[INFO] [stdout] 129 |   let mut hashmap_container: Arc<Mutex<Vec<BTreeMap<String, (i64, f64, f64, f64)>>>> = Arc::new(Mutex::new(Vec::with_capacity(n_threads)));
[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/bin4.rs:141:7
[INFO] [stdout]     |
[INFO] [stdout] 141 |   let mut mmap_positions: Arc<Mutex<BTreeMap<usize, (usize, usize)>>> = Arc::new(Mutex::new(BTreeMap::new()));
[INFO] [stdout]     |       ----^^^^^^^^^^^^^^
[INFO] [stdout]     |       |
[INFO] [stdout]     |       help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `thread_index_start`
[INFO] [stdout]    --> src/bin/bin4.rs:169:13
[INFO] [stdout]     |
[INFO] [stdout] 169 |         let mut thread_index_start = start_pos;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_thread_index_start`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start_master`
[INFO] [stdout]    --> src/bin/bin4.rs:123:7
[INFO] [stdout]     |
[INFO] [stdout] 123 |   let start_master = Instant::now();
[INFO] [stdout]     |       ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_start_master`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start_thread`
[INFO] [stdout]    --> src/bin/bin4.rs:201:7
[INFO] [stdout]     |
[INFO] [stdout] 201 |   let start_thread = Instant::now();
[INFO] [stdout]     |       ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_start_thread`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `duration`
[INFO] [stdout]    --> src/bin/bin4.rs:289:9
[INFO] [stdout]     |
[INFO] [stdout] 289 |     let duration = start.elapsed();
[INFO] [stdout]     |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_duration`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-1brc` (bin "bin3") due to 1 previous error; 12 warnings emitted
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/bin3.rs:37:7
[INFO] [stdout]    |
[INFO] [stdout] 37 |   let mut hashmap_container: Arc<Mutex<Vec<BTreeMap<String, (i32, i64, i64, i64)>>>> = Arc::new(Mutex::new(Vec::with_capacity(n_threads *...
[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: variable does not need to be mutable
[INFO] [stdout]    --> src/bin/bin3.rs:131:9
[INFO] [stdout]     |
[INFO] [stdout] 131 |     let mut start_pos: usize = 0;
[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/bin3.rs:132:9
[INFO] [stdout]     |
[INFO] [stdout] 132 |     let mut end_pos: usize = 0;
[INFO] [stdout]     |         ----^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]    --> src/bin/bin3.rs:135:11
[INFO] [stdout]     |
[INFO] [stdout] 135 |       let start = Instant::now();
[INFO] [stdout]     |           ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]    --> src/bin/bin3.rs:140:13
[INFO] [stdout]     |
[INFO] [stdout] 140 |         let start = Instant::now();
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `start_pos` is never read
[INFO] [stdout]    --> src/bin/bin3.rs:136:34
[INFO] [stdout]     |
[INFO] [stdout] 136 |       let mut start_pos: usize = 0;
[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: `line_count`
[INFO] [stdout]   --> src/bin/bin3.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |     let line_count = Arc::clone(&no_crlf);
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_line_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `start_pos` is never read
[INFO] [stdout]   --> src/bin/bin3.rs:50:32
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let mut start_pos: usize = 0;
[INFO] [stdout]    |                                ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `start_pos` is never read
[INFO] [stdout]   --> src/bin/bin3.rs:71:7
[INFO] [stdout]    |
[INFO] [stdout] 71 |       start_pos += thread_mmap.len();
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reader`
[INFO] [stdout]   --> src/bin/bin3.rs:42:7
[INFO] [stdout]    |
[INFO] [stdout] 42 |   let reader = BufReader::new(&file);
[INFO] [stdout]    |       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_reader`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start_pos`
[INFO] [stdout]    --> src/bin/bin3.rs:131:9
[INFO] [stdout]     |
[INFO] [stdout] 131 |     let mut start_pos: usize = 0;
[INFO] [stdout]     |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_start_pos`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `end_pos`
[INFO] [stdout]    --> src/bin/bin3.rs:132:9
[INFO] [stdout]     |
[INFO] [stdout] 132 |     let mut end_pos: usize = 0;
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_end_pos`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/bin/bin3.rs:76:40
[INFO] [stdout]    |
[INFO] [stdout] 76 |         *line_count.lock().unwrap() += <usize as TryInto<usize>>::try_into(thread_mmap.iter().filter(|x| **x == 10).count()).unwrap();
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-1brc` (bin "bin3" test) due to 1 previous error; 12 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "d8537fd0e357920867053ea304f6825d8a1964169b7f377ad47564bb2c78923b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8537fd0e357920867053ea304f6825d8a1964169b7f377ad47564bb2c78923b", kill_on_drop: false }`
[INFO] [stdout] d8537fd0e357920867053ea304f6825d8a1964169b7f377ad47564bb2c78923b