[INFO] cloning repository https://github.com/rajasekarv/ant-colony-optimization
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rajasekarv/ant-colony-optimization" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frajasekarv%2Fant-colony-optimization", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frajasekarv%2Fant-colony-optimization'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a3a1f4c379ddeeeab6fccbf6564fc46e938951b9
[INFO] checking rajasekarv/ant-colony-optimization against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frajasekarv%2Fant-colony-optimization" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rajasekarv/ant-colony-optimization on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rajasekarv/ant-colony-optimization
[INFO] finished tweaking git repo https://github.com/rajasekarv/ant-colony-optimization
[INFO] tweaked toml for git repo https://github.com/rajasekarv/ant-colony-optimization written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/rajasekarv/ant-colony-optimization already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded permutation v0.2.5
[INFO] [stderr]   Downloaded bincode v0.8.0
[INFO] [stderr]   Downloaded rustbreak v1.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7893737c51342c525b02657e328b16e6d3d8bc1ea0da74a304afa263478982a8
[INFO] running `Command { std: "docker" "start" "-a" "7893737c51342c525b02657e328b16e6d3d8bc1ea0da74a304afa263478982a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7893737c51342c525b02657e328b16e6d3d8bc1ea0da74a304afa263478982a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7893737c51342c525b02657e328b16e6d3d8bc1ea0da74a304afa263478982a8", kill_on_drop: false }`
[INFO] [stdout] 7893737c51342c525b02657e328b16e6d3d8bc1ea0da74a304afa263478982a8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 29c4fc98f5d8134b4eed1c939449a08d50311e21a0dbb791ec762aad1a81345a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "29c4fc98f5d8134b4eed1c939449a08d50311e21a0dbb791ec762aad1a81345a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.46
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling serde v1.0.84
[INFO] [stderr]     Checking permutation v0.2.5
[INFO] [stderr]    Compiling quote v0.6.10
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking rand_chacha v0.1.1
[INFO] [stderr]    Compiling syn v0.15.24
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling rand_pcg v0.1.1
[INFO] [stderr]     Checking num_cpus v1.9.0
[INFO] [stderr]     Checking rand_os v0.1.1
[INFO] [stderr]     Checking fs2 v0.4.3
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking rayon-core v1.4.1
[INFO] [stderr]     Checking rand v0.6.4
[INFO] [stderr]     Checking rayon v1.0.3
[INFO] [stderr]    Compiling serde_derive v1.0.84
[INFO] [stderr]     Checking bincode v0.8.0
[INFO] [stderr]     Checking rustbreak v1.4.0
[INFO] [stderr]     Checking aco_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `HashMap`
[INFO] [stdout]  --> src/aco_mem.rs:8:24
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::collections::{HashMap, HashSet};
[INFO] [stdout]   |                        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::f64::INFINITY`
[INFO] [stdout]   --> src/aco_mem.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::f64::INFINITY;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `memmap::MmapOptions`
[INFO] [stdout]  --> src/aco_memmap.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use memmap::MmapOptions;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::f32::INFINITY`
[INFO] [stdout]   --> src/aco_memmap.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::f32::INFINITY;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::mem::transmute`
[INFO] [stdout]   --> src/aco_memmap.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::mem::transmute;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `slice`
[INFO] [stdout]   --> src/aco_memmap.rs:15:16
[INFO] [stdout]    |
[INFO] [stdout] 15 | use std::{mem, slice};
[INFO] [stdout]    |                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/aco_no_mem.rs:229:21
[INFO] [stdout]     |
[INFO] [stdout] 229 | /                     ({
[INFO] [stdout] 230 | |                         if visited[j] {
[INFO] [stdout] 231 | |                             0.0
[INFO] [stdout] 232 | |                         } else {
[INFO] [stdout] ...   |
[INFO] [stdout] 239 | |                         }
[INFO] [stdout] 240 | |                     })
[INFO] [stdout]     | |______________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 229 |                     {
[INFO] [stdout] 230 |                         if visited[j] {
[INFO] [stdout] 231 |                             0.0
[INFO] [stdout] 232 |                         } else {
[INFO] [stdout] 233 |                             self.default_pheromone
[INFO] [stdout] 234 |                                 * (1.0
[INFO] [stdout]   ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `HashMap`
[INFO] [stdout]  --> src/aco_mem.rs:8:24
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::collections::{HashMap, HashSet};
[INFO] [stdout]   |                        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::f64::INFINITY`
[INFO] [stdout]   --> src/aco_mem.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::f64::INFINITY;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `memmap::MmapOptions`
[INFO] [stdout]  --> src/aco_memmap.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use memmap::MmapOptions;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::f32::INFINITY`
[INFO] [stdout]   --> src/aco_memmap.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::f32::INFINITY;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::mem::transmute`
[INFO] [stdout]   --> src/aco_memmap.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::mem::transmute;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `slice`
[INFO] [stdout]   --> src/aco_memmap.rs:15:16
[INFO] [stdout]    |
[INFO] [stdout] 15 | use std::{mem, slice};
[INFO] [stdout]    |                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/aco_no_mem.rs:229:21
[INFO] [stdout]     |
[INFO] [stdout] 229 | /                     ({
[INFO] [stdout] 230 | |                         if visited[j] {
[INFO] [stdout] 231 | |                             0.0
[INFO] [stdout] 232 | |                         } else {
[INFO] [stdout] ...   |
[INFO] [stdout] 239 | |                         }
[INFO] [stdout] 240 | |                     })
[INFO] [stdout]     | |______________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 229 |                     {
[INFO] [stdout] 230 |                         if visited[j] {
[INFO] [stdout] 231 |                             0.0
[INFO] [stdout] 232 |                         } else {
[INFO] [stdout] 233 |                             self.default_pheromone
[INFO] [stdout] 234 |                                 * (1.0
[INFO] [stdout]   ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rayon::prelude`
[INFO] [stdout]  --> src/aco_mem.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use rayon::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/aco_mem.rs:153:13
[INFO] [stdout]     |
[INFO] [stdout] 153 |         for i in 0..(self.distances.len() - 1) {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/aco_mem.rs:116:17
[INFO] [stdout]     |
[INFO] [stdout] 116 |             let mut iteration_paths: Vec<TourPath>;
[INFO] [stdout]     |                 ----^^^^^^^^^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rayon::prelude`
[INFO] [stdout]  --> src/aco_mem.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use rayon::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/aco_mem.rs:153:13
[INFO] [stdout]     |
[INFO] [stdout] 153 |         for i in 0..(self.distances.len() - 1) {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/aco_memmap.rs:146:17
[INFO] [stdout]     |
[INFO] [stdout] 146 |             let mut iteration_paths: Vec<TourPath>;
[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/aco_mem.rs:116:17
[INFO] [stdout]     |
[INFO] [stdout] 116 |             let mut iteration_paths: Vec<TourPath>;
[INFO] [stdout]     |                 ----^^^^^^^^^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/aco_memmap.rs:146:17
[INFO] [stdout]     |
[INFO] [stdout] 146 |             let mut iteration_paths: Vec<TourPath>;
[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/aco_no_mem.rs:136:17
[INFO] [stdout]     |
[INFO] [stdout] 136 |             let mut iteration_paths: Vec<TourPath>;
[INFO] [stdout]     |                 ----^^^^^^^^^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `euclidean_distance`
[INFO] [stdout]    --> src/aco_mem.rs:245:8
[INFO] [stdout]     |
[INFO] [stdout] 245 |     fn euclidean_distance(a: &Coordinate, b: &Coordinate) -> f64 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/aco_no_mem.rs:136:17
[INFO] [stdout]     |
[INFO] [stdout] 136 |             let mut iteration_paths: Vec<TourPath>;
[INFO] [stdout]     |                 ----^^^^^^^^^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `euclidean_distance`
[INFO] [stdout]    --> src/aco_mem.rs:245:8
[INFO] [stdout]     |
[INFO] [stdout] 245 |     fn euclidean_distance(a: &Coordinate, b: &Coordinate) -> f64 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `fnv::FnvHashMap`
[INFO] [stdout]  --> src/bin/aco_using_memmap.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use fnv::FnvHashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::mem::transmute`
[INFO] [stdout]   --> src/bin/aco_using_memmap.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use std::mem::transmute;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `slice`
[INFO] [stdout]   --> src/bin/aco_using_memmap.rs:16:16
[INFO] [stdout]    |
[INFO] [stdout] 16 | use std::{mem, slice};
[INFO] [stdout]    |                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `fnv::FnvHashMap`
[INFO] [stdout]  --> src/bin/aco_using_memmap.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use fnv::FnvHashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::mem::transmute`
[INFO] [stdout]   --> src/bin/aco_using_memmap.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use std::mem::transmute;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `slice`
[INFO] [stdout]   --> src/bin/aco_using_memmap.rs:16:16
[INFO] [stdout]    |
[INFO] [stdout] 16 | use std::{mem, slice};
[INFO] [stdout]    |                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/bin/aco_using_ram.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/bin/aco_using_ram.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/aco_using_memmap.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |         let mut f = File::create("/data1/temp").expect("Unable to create file");
[INFO] [stdout]    |             ----^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/aco_using_memmap.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |     let mut f = File::open("/data1/temp").unwrap();
[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/aco_using_memmap.rs:98:13
[INFO] [stdout]    |
[INFO] [stdout] 98 |         let mut f = File::create("temp").expect("Unable to create file");
[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/aco_using_memmap.rs:115:9
[INFO] [stdout]     |
[INFO] [stdout] 115 |     let mut f = File::open("temp").unwrap();
[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/aco_using_memmap.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |         let mut f = File::create("/data1/temp").expect("Unable to create file");
[INFO] [stdout]    |             ----^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/aco_using_memmap.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |     let mut f = File::open("/data1/temp").unwrap();
[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/aco_using_memmap.rs:98:13
[INFO] [stdout]    |
[INFO] [stdout] 98 |         let mut f = File::create("temp").expect("Unable to create file");
[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/aco_using_memmap.rs:115:9
[INFO] [stdout]     |
[INFO] [stdout] 115 |     let mut f = File::open("temp").unwrap();
[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/aco_using_memmap.rs:209:9
[INFO] [stdout]     |
[INFO] [stdout] 209 |     let mut f = File::create("temp").expect("Unable to create file");
[INFO] [stdout]     |         ----^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main0`
[INFO] [stdout]   --> src/bin/aco_using_memmap.rs:74:4
[INFO] [stdout]    |
[INFO] [stdout] 74 | fn main0() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main4`
[INFO] [stdout]    --> src/bin/aco_using_memmap.rs:144:4
[INFO] [stdout]     |
[INFO] [stdout] 144 | fn main4() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main1`
[INFO] [stdout]    --> src/bin/aco_using_memmap.rs:185:4
[INFO] [stdout]     |
[INFO] [stdout] 185 | fn main1() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/bin/aco_using_memmap.rs:209:9
[INFO] [stdout]     |
[INFO] [stdout] 209 |     let mut f = File::create("temp").expect("Unable to create file");
[INFO] [stdout]     |         ----^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main0`
[INFO] [stdout]   --> src/bin/aco_using_memmap.rs:74:4
[INFO] [stdout]    |
[INFO] [stdout] 74 | fn main0() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main4`
[INFO] [stdout]    --> src/bin/aco_using_memmap.rs:144:4
[INFO] [stdout]     |
[INFO] [stdout] 144 | fn main4() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main1`
[INFO] [stdout]    --> src/bin/aco_using_memmap.rs:185:4
[INFO] [stdout]     |
[INFO] [stdout] 185 | fn main1() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 34.05s
[INFO] running `Command { std: "docker" "inspect" "29c4fc98f5d8134b4eed1c939449a08d50311e21a0dbb791ec762aad1a81345a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29c4fc98f5d8134b4eed1c939449a08d50311e21a0dbb791ec762aad1a81345a", kill_on_drop: false }`
[INFO] [stdout] 29c4fc98f5d8134b4eed1c939449a08d50311e21a0dbb791ec762aad1a81345a