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[INFO] [stderr] From https://github.com/Dizans/mapreduce-rust
[INFO] [stderr]    e7eb403..0483828  master     -> master
[INFO] running `"git" "rev-parse" "HEAD"`
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[INFO] checking Dizans/mapreduce-rust against master#0cbcb17d3306d6e22eafc2c05ce885db97d0189c for pr-68766
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[INFO] running `"/workspace/cargo-home/bin/cargo" "+0cbcb17d3306d6e22eafc2c05ce885db97d0189c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+0cbcb17d3306d6e22eafc2c05ce885db97d0189c" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] fd71c3e7a8cc5ea52a087b27f937d53aad68379f6fd6d37caad23dd7408b18ec
[INFO] running `"docker" "start" "-a" "fd71c3e7a8cc5ea52a087b27f937d53aad68379f6fd6d37caad23dd7408b18ec"`
[INFO] [stderr]     Checking raii-counter v0.2.1
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling tokio-macros v0.2.3
[INFO] [stderr]    Compiling tarpc-plugins v0.7.0
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]     Checking serde v1.0.104
[INFO] [stderr]     Checking tokio v0.2.9
[INFO] [stderr]    Compiling futures-macro v0.3.1
[INFO] [stderr]     Checking futures-util v0.3.1
[INFO] [stderr]     Checking tokio-util v0.2.0
[INFO] [stderr]     Checking serde_json v1.0.44
[INFO] [stderr]     Checking futures-executor v0.3.1
[INFO] [stderr]     Checking futures v0.3.1
[INFO] [stderr]     Checking tokio-serde v0.6.0
[INFO] [stderr]     Checking tarpc v0.20.0
[INFO] [stderr]     Checking mr v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `self`
[INFO] [stderr]  --> src/common_reduce.rs:1:15
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io::{self, prelude::*, BufReader};
[INFO] [stderr]   |               ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp::Ordering`
[INFO] [stderr]  --> src/common_reduce.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::cmp::Ordering;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tokio::sync::mpsc`
[INFO] [stderr]   --> src/master_rpc.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 | use tokio::sync::mpsc;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp::Ordering`
[INFO] [stderr]  --> src/master_splitmerge.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::cmp::Ordering;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BufWriter`, `self`
[INFO] [stderr]  --> src/master_splitmerge.rs:4:15
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io::{self, prelude::*, BufReader, BufWriter};
[INFO] [stderr]   |               ^^^^                         ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::env`
[INFO] [stderr]   --> src/main.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use std::env;
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fs::File`
[INFO] [stderr]   --> src/main.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::fs::File;
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::prelude::*`
[INFO] [stderr]   --> src/main.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | use std::io::prelude::*;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `App`, `Arg`, `SubCommand`
[INFO] [stderr]   --> src/main.rs:14:12
[INFO] [stderr]    |
[INFO] [stderr] 14 | use clap::{App, Arg, SubCommand};
[INFO] [stderr]    |            ^^^  ^^^  ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `common_map::do_map`
[INFO] [stderr]   --> src/main.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 | use common_map::do_map;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `common_reduce::do_reduce`
[INFO] [stderr]   --> src/main.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | use common_reduce::do_reduce;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `master_splitmerge::merge`
[INFO] [stderr]   --> src/main.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 | use master_splitmerge::merge;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `utils::merge_name`
[INFO] [stderr]   --> src/main.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 | use utils::merge_name;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `self`
[INFO] [stderr]  --> src/common_reduce.rs:1:15
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io::{self, prelude::*, BufReader};
[INFO] [stderr]   |               ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp::Ordering`
[INFO] [stderr]  --> src/common_reduce.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::cmp::Ordering;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tokio::sync::mpsc`
[INFO] [stderr]   --> src/master_rpc.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 | use tokio::sync::mpsc;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp::Ordering`
[INFO] [stderr]  --> src/master_splitmerge.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::cmp::Ordering;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BufWriter`, `self`
[INFO] [stderr]  --> src/master_splitmerge.rs:4:15
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io::{self, prelude::*, BufReader, BufWriter};
[INFO] [stderr]   |               ^^^^                         ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::env`
[INFO] [stderr]   --> src/main.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use std::env;
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fs::File`
[INFO] [stderr]   --> src/main.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::fs::File;
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::prelude::*`
[INFO] [stderr]   --> src/main.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | use std::io::prelude::*;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `App`, `Arg`, `SubCommand`
[INFO] [stderr]   --> src/main.rs:14:12
[INFO] [stderr]    |
[INFO] [stderr] 14 | use clap::{App, Arg, SubCommand};
[INFO] [stderr]    |            ^^^  ^^^  ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `common_map::do_map`
[INFO] [stderr]   --> src/main.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 | use common_map::do_map;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `common_reduce::do_reduce`
[INFO] [stderr]   --> src/main.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | use common_reduce::do_reduce;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `master_splitmerge::merge`
[INFO] [stderr]   --> src/main.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 | use master_splitmerge::merge;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `utils::merge_name`
[INFO] [stderr]   --> src/main.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 | use utils::merge_name;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `server`
[INFO] [stderr]   --> src/main.rs:48:9
[INFO] [stderr]    |
[INFO] [stderr] 48 |     let server = start_server().await;
[INFO] [stderr]    |         ^^^^^^ help: consider prefixing with an underscore: `_server`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `job_name`
[INFO] [stderr]  --> src/master.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     job_name: &str,
[INFO] [stderr]   |     ^^^^^^^^ help: consider prefixing with an underscore: `_job_name`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `files`
[INFO] [stderr]  --> src/master.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     files: Vec<String>,
[INFO] [stderr]   |     ^^^^^ help: consider prefixing with an underscore: `_files`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n_reduce`
[INFO] [stderr]  --> src/master.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     n_reduce: usize,
[INFO] [stderr]   |     ^^^^^^^^ help: consider prefixing with an underscore: `_n_reduce`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `server`
[INFO] [stderr]   --> src/main.rs:48:9
[INFO] [stderr]    |
[INFO] [stderr] 48 |     let server = start_server().await;
[INFO] [stderr]    |         ^^^^^^ help: consider prefixing with an underscore: `_server`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `job_name`
[INFO] [stderr]  --> src/master.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     job_name: &str,
[INFO] [stderr]   |     ^^^^^^^^ help: consider prefixing with an underscore: `_job_name`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/common_map.rs:23:13
[INFO] [stderr]    |
[INFO] [stderr] 23 |         let mut file =
[INFO] [stderr]    |             ----^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `files`
[INFO] [stderr]  --> src/master.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     files: Vec<String>,
[INFO] [stderr]   |     ^^^^^ help: consider prefixing with an underscore: `_files`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n_reduce`
[INFO] [stderr]  --> src/master.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     n_reduce: usize,
[INFO] [stderr]   |     ^^^^^^^^ help: consider prefixing with an underscore: `_n_reduce`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/common_map.rs:23:13
[INFO] [stderr]    |
[INFO] [stderr] 23 |         let mut file =
[INFO] [stderr]    |             ----^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `do_map`
[INFO] [stderr]   --> src/common_map.rs:10:8
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub fn do_map(
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `hash_key`
[INFO] [stderr]   --> src/common_map.rs:43:4
[INFO] [stderr]    |
[INFO] [stderr] 43 | fn hash_key(k: &str) -> usize {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `do_reduce`
[INFO] [stderr]  --> src/common_reduce.rs:8:8
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub fn do_reduce(job_name: &str, reduce_task: usize, 
[INFO] [stderr]   |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `run`
[INFO] [stderr]  --> src/master.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn run<F: Fn(JobPhase)>(
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `sequential`
[INFO] [stderr]   --> src/master.rs:19:8
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub fn sequential(
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `seq_finish`
[INFO] [stderr]   --> src/master.rs:42:4
[INFO] [stderr]    |
[INFO] [stderr] 42 | fn seq_finish() {}
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `wc_seq`
[INFO] [stderr]   --> src/master.rs:44:4
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn wc_seq() {
[INFO] [stderr]    |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `merge`
[INFO] [stderr]   --> src/master_splitmerge.rs:10:8
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub fn merge(job_name: &str, n_reduce: usize) {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `JobPhase`
[INFO] [stderr]  --> src/utils.rs:9:10
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub enum JobPhase {
[INFO] [stderr]   |          ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `merge_name`
[INFO] [stderr]   --> src/utils.rs:14:8
[INFO] [stderr]    |
[INFO] [stderr] 14 | pub fn merge_name(job_name: &str, reduce_task: usize) -> String {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `reduce_name`
[INFO] [stderr]   --> src/utils.rs:18:8
[INFO] [stderr]    |
[INFO] [stderr] 18 | pub fn reduce_name(job_name: &str, map_task: usize, reduce_task: usize) -> String {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `map`
[INFO] [stderr]  --> src/wc.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn map(filename: &str, contents: &str) -> Vec<KeyValue> {
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `reduce`
[INFO] [stderr]   --> src/wc.rs:19:8
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub fn reduce(key: &str, value: &Vec<String>) -> String {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/master_splitmerge.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |         file.write_all(&format!("{}: {}\n", k, kvs.get(k).unwrap()).into_bytes());
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `do_map`
[INFO] [stderr]   --> src/common_map.rs:10:8
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub fn do_map(
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `hash_key`
[INFO] [stderr]   --> src/common_map.rs:43:4
[INFO] [stderr]    |
[INFO] [stderr] 43 | fn hash_key(k: &str) -> usize {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `do_reduce`
[INFO] [stderr]  --> src/common_reduce.rs:8:8
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub fn do_reduce(job_name: &str, reduce_task: usize, 
[INFO] [stderr]   |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `run`
[INFO] [stderr]  --> src/master.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn run<F: Fn(JobPhase)>(
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `sequential`
[INFO] [stderr]   --> src/master.rs:19:8
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub fn sequential(
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `seq_finish`
[INFO] [stderr]   --> src/master.rs:42:4
[INFO] [stderr]    |
[INFO] [stderr] 42 | fn seq_finish() {}
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `wc_seq`
[INFO] [stderr]   --> src/master.rs:44:4
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn wc_seq() {
[INFO] [stderr]    |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `merge`
[INFO] [stderr]   --> src/master_splitmerge.rs:10:8
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub fn merge(job_name: &str, n_reduce: usize) {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `JobPhase`
[INFO] [stderr]  --> src/utils.rs:9:10
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub enum JobPhase {
[INFO] [stderr]   |          ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `merge_name`
[INFO] [stderr]   --> src/utils.rs:14:8
[INFO] [stderr]    |
[INFO] [stderr] 14 | pub fn merge_name(job_name: &str, reduce_task: usize) -> String {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `reduce_name`
[INFO] [stderr]   --> src/utils.rs:18:8
[INFO] [stderr]    |
[INFO] [stderr] 18 | pub fn reduce_name(job_name: &str, map_task: usize, reduce_task: usize) -> String {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `map`
[INFO] [stderr]  --> src/wc.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn map(filename: &str, contents: &str) -> Vec<KeyValue> {
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `reduce`
[INFO] [stderr]   --> src/wc.rs:19:8
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub fn reduce(key: &str, value: &Vec<String>) -> String {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/master_splitmerge.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |         file.write_all(&format!("{}: {}\n", k, kvs.get(k).unwrap()).into_bytes());
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 38.63s
[INFO] running `"docker" "inspect" "fd71c3e7a8cc5ea52a087b27f937d53aad68379f6fd6d37caad23dd7408b18ec"`
[INFO] running `"docker" "rm" "-f" "fd71c3e7a8cc5ea52a087b27f937d53aad68379f6fd6d37caad23dd7408b18ec"`
[INFO] [stdout] fd71c3e7a8cc5ea52a087b27f937d53aad68379f6fd6d37caad23dd7408b18ec