[INFO] cloning repository https://github.com/basicss1/hw2_redo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/basicss1/hw2_redo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbasicss1%2Fhw2_redo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbasicss1%2Fhw2_redo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 74760731fb74c6a135c4a3ef7f78cc2858fee05f
[INFO] testing basicss1/hw2_redo against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbasicss1%2Fhw2_redo" "/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/basicss1/hw2_redo on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/basicss1/hw2_redo
[INFO] finished tweaking git repo https://github.com/basicss1/hw2_redo
[INFO] tweaked toml for git repo https://github.com/basicss1/hw2_redo written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/basicss1/hw2_redo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded custom_error v1.6.0
[INFO] [stderr]   Downloaded snafu-derive v0.3.1
[INFO] [stderr]   Downloaded snafu v0.3.1
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dadc5136d1707ab771942c9eacf16c9f5a72a8658b0cadc3b4a10ce8760dbd7b
[INFO] running `Command { std: "docker" "start" "-a" "dadc5136d1707ab771942c9eacf16c9f5a72a8658b0cadc3b4a10ce8760dbd7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dadc5136d1707ab771942c9eacf16c9f5a72a8658b0cadc3b4a10ce8760dbd7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dadc5136d1707ab771942c9eacf16c9f5a72a8658b0cadc3b4a10ce8760dbd7b", kill_on_drop: false }`
[INFO] [stdout] dadc5136d1707ab771942c9eacf16c9f5a72a8658b0cadc3b4a10ce8760dbd7b
[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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4572b25780c1663f127099966b73ae6954c5804f2bbe7a34ea4a93b9792c7148
[INFO] running `Command { std: "docker" "start" "-a" "4572b25780c1663f127099966b73ae6954c5804f2bbe7a34ea4a93b9792c7148", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling cc v1.0.37
[INFO] [stderr]    Compiling libc v0.2.58
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling autocfg v0.1.4
[INFO] [stderr]    Compiling syn v0.15.35
[INFO] [stderr]    Compiling rustc-demangle v0.1.15
[INFO] [stderr]    Compiling cfg-if v0.1.9
[INFO] [stderr]    Compiling custom_error v1.6.0
[INFO] [stderr]    Compiling backtrace v0.3.30
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling snafu-derive v0.3.1
[INFO] [stderr]    Compiling snafu v0.3.1
[INFO] [stderr]    Compiling graph v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `process`
[INFO] [stdout]  --> src/lib.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{env, process};
[INFO] [stdout]   |                ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `File`
[INFO] [stdout]  --> src/lib.rs:2:20
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fs::{self,File};
[INFO] [stdout]   |                    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/lib.rs:64:11
[INFO] [stdout]    |
[INFO] [stdout] 64 |         if(!self.backward.contains(&word.to_string())){
[INFO] [stdout]    |           ^                                          ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 64 -         if(!self.backward.contains(&word.to_string())){
[INFO] [stdout] 64 +         if !self.backward.contains(&word.to_string()) {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/lib.rs:187:12
[INFO] [stdout]     |
[INFO] [stdout] 187 |         if (*found == 0){
[INFO] [stdout]     |            ^           ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 187 -         if (*found == 0){
[INFO] [stdout] 187 +         if *found == 0 {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::str::<impl str>::trim_left`: superseded by `trim_start`
[INFO] [stdout]    --> src/lib.rs:128:14
[INFO] [stdout]     |
[INFO] [stdout] 128 |     contents.trim_left().trim_right();
[INFO] [stdout]     |              ^^^^^^^^^ help: replace the use of the deprecated associated function: `trim_start`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::str::<impl str>::trim_right`: superseded by `trim_end`
[INFO] [stdout]    --> src/lib.rs:128:26
[INFO] [stdout]     |
[INFO] [stdout] 128 |     contents.trim_left().trim_right();
[INFO] [stdout]     |                          ^^^^^^^^^^ help: replace the use of the deprecated associated function: `trim_end`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `prelude`
[INFO] [stdout]  --> src/lib.rs:5:28
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::{self, Write, prelude::*};
[INFO] [stdout]   |                            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `g`
[INFO] [stdout]    --> src/lib.rs:164:13
[INFO] [stdout]     |
[INFO] [stdout] 164 |         let g = match io::stdin().read_line(&mut contents) {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_g`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/lib.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |         for i in 0..length{
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lib.rs:93:92
[INFO] [stdout]    |
[INFO] [stdout] 93 |     pub fn helper(&self, answer: &mut Vec<String>, begin_values: usize, end_values: usize, mut found: &mut i32){
[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/lib.rs:121:20
[INFO] [stdout]     |
[INFO] [stdout] 121 | pub fn read_string(mut label_graph: &mut LabelGraph) -> io::Result<()>{
[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/lib.rs:182:13
[INFO] [stdout]     |
[INFO] [stdout] 182 |         let mut found: &mut i32 = &mut 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/lib.rs:184:13
[INFO] [stdout]     |
[INFO] [stdout] 184 |         let mut ans: &mut Vec<String> = &mut Vec::new();
[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/lib.rs:255:13
[INFO] [stdout]     |
[INFO] [stdout] 255 |         let mut ans: &mut Vec<String> = &mut Vec::new();
[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/lib.rs:256:13
[INFO] [stdout]     |
[INFO] [stdout] 256 |         let mut found: &mut i32 = &mut 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/lib.rs:262:13
[INFO] [stdout]     |
[INFO] [stdout] 262 |         let mut ans1: &mut Vec<String> = &mut Vec::new();
[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/lib.rs:263:13
[INFO] [stdout]     |
[INFO] [stdout] 263 |         let mut found1: &mut i32 = &mut 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/lib.rs:273:13
[INFO] [stdout]     |
[INFO] [stdout] 273 |         let mut ans2: &mut Vec<String> = &mut Vec::new();
[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/lib.rs:274:13
[INFO] [stdout]     |
[INFO] [stdout] 274 |         let mut found2: &mut i32 = &mut 0;
[INFO] [stdout]     |             ----^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `intgraph_set_1_for_neighbor`
[INFO] [stdout]    --> src/lib.rs:205:8
[INFO] [stdout]     |
[INFO] [stdout] 205 |     fn intgraph_set_1_for_neighbor(){
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `label_graph_helper`
[INFO] [stdout]    --> src/lib.rs:240:8
[INFO] [stdout]     |
[INFO] [stdout] 240 |     fn label_graph_helper(){
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `core::str::<impl str>::trim_right` that must be used
[INFO] [stdout]    --> src/lib.rs:128:5
[INFO] [stdout]     |
[INFO] [stdout] 128 |     contents.trim_left().trim_right();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this returns the trimmed string as a new slice, without modifying the original
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 22 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `process`
[INFO] [stdout]  --> src/lib.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{env, process};
[INFO] [stdout]   |                ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `File`
[INFO] [stdout]  --> src/lib.rs:2:20
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fs::{self,File};
[INFO] [stdout]   |                    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/lib.rs:64:11
[INFO] [stdout]    |
[INFO] [stdout] 64 |         if(!self.backward.contains(&word.to_string())){
[INFO] [stdout]    |           ^                                          ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 64 -         if(!self.backward.contains(&word.to_string())){
[INFO] [stdout] 64 +         if !self.backward.contains(&word.to_string()) {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/lib.rs:187:12
[INFO] [stdout]     |
[INFO] [stdout] 187 |         if (*found == 0){
[INFO] [stdout]     |            ^           ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 187 -         if (*found == 0){
[INFO] [stdout] 187 +         if *found == 0 {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::str::<impl str>::trim_left`: superseded by `trim_start`
[INFO] [stdout]    --> src/lib.rs:128:14
[INFO] [stdout]     |
[INFO] [stdout] 128 |     contents.trim_left().trim_right();
[INFO] [stdout]     |              ^^^^^^^^^ help: replace the use of the deprecated associated function: `trim_start`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::str::<impl str>::trim_right`: superseded by `trim_end`
[INFO] [stdout]    --> src/lib.rs:128:26
[INFO] [stdout]     |
[INFO] [stdout] 128 |     contents.trim_left().trim_right();
[INFO] [stdout]     |                          ^^^^^^^^^^ help: replace the use of the deprecated associated function: `trim_end`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `prelude`
[INFO] [stdout]  --> src/lib.rs:5:28
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::{self, Write, prelude::*};
[INFO] [stdout]   |                            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/main.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let a = lib::read_string(label_graph)?;
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `g`
[INFO] [stdout]  --> src/main.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let g = lib::read_input(label_graph)?;
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_g`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `g`
[INFO] [stdout]    --> src/lib.rs:164:13
[INFO] [stdout]     |
[INFO] [stdout] 164 |         let g = match io::stdin().read_line(&mut contents) {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_g`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/lib.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |         for i in 0..length{
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lib.rs:93:92
[INFO] [stdout]    |
[INFO] [stdout] 93 |     pub fn helper(&self, answer: &mut Vec<String>, begin_values: usize, end_values: usize, mut found: &mut i32){
[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/lib.rs:121:20
[INFO] [stdout]     |
[INFO] [stdout] 121 | pub fn read_string(mut label_graph: &mut LabelGraph) -> io::Result<()>{
[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/lib.rs:182:13
[INFO] [stdout]     |
[INFO] [stdout] 182 |         let mut found: &mut i32 = &mut 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/lib.rs:184:13
[INFO] [stdout]     |
[INFO] [stdout] 184 |         let mut ans: &mut Vec<String> = &mut Vec::new();
[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/lib.rs:255:13
[INFO] [stdout]     |
[INFO] [stdout] 255 |         let mut ans: &mut Vec<String> = &mut Vec::new();
[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/lib.rs:256:13
[INFO] [stdout]     |
[INFO] [stdout] 256 |         let mut found: &mut i32 = &mut 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/lib.rs:262:13
[INFO] [stdout]     |
[INFO] [stdout] 262 |         let mut ans1: &mut Vec<String> = &mut Vec::new();
[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/lib.rs:263:13
[INFO] [stdout]     |
[INFO] [stdout] 263 |         let mut found1: &mut i32 = &mut 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/lib.rs:273:13
[INFO] [stdout]     |
[INFO] [stdout] 273 |         let mut ans2: &mut Vec<String> = &mut Vec::new();
[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/lib.rs:274:13
[INFO] [stdout]     |
[INFO] [stdout] 274 |         let mut found2: &mut i32 = &mut 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/main.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut label_graph:&mut lib::LabelGraph = &mut lib::LabelGraph::new();
[INFO] [stdout]   |         ----^^^^^^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_len`
[INFO] [stdout]   --> src/lib.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn get_len(&self) -> usize{
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_contents`
[INFO] [stdout]   --> src/lib.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn get_contents(&self) -> &Vec<Vec<usize>>{
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_graph`
[INFO] [stdout]   --> src/lib.rs:85:12
[INFO] [stdout]    |
[INFO] [stdout] 85 |     pub fn set_graph(&mut self, intgraph: IntGraph, labelmap: LabelMap){
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `intgraph_set_1_for_neighbor`
[INFO] [stdout]    --> src/lib.rs:205:8
[INFO] [stdout]     |
[INFO] [stdout] 205 |     fn intgraph_set_1_for_neighbor(){
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `label_graph_helper`
[INFO] [stdout]    --> src/lib.rs:240:8
[INFO] [stdout]     |
[INFO] [stdout] 240 |     fn label_graph_helper(){
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `core::str::<impl str>::trim_right` that must be used
[INFO] [stdout]    --> src/lib.rs:128:5
[INFO] [stdout]     |
[INFO] [stdout] 128 |     contents.trim_left().trim_right();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this returns the trimmed string as a new slice, without modifying the original
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 28 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.90s
[INFO] running `Command { std: "docker" "inspect" "4572b25780c1663f127099966b73ae6954c5804f2bbe7a34ea4a93b9792c7148", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4572b25780c1663f127099966b73ae6954c5804f2bbe7a34ea4a93b9792c7148", kill_on_drop: false }`
[INFO] [stdout] 4572b25780c1663f127099966b73ae6954c5804f2bbe7a34ea4a93b9792c7148
[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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e32e803ba229651e9a214998e3c8be372b7ad641727b25a6ecd7064728d14c4e
[INFO] running `Command { std: "docker" "start" "-a" "e32e803ba229651e9a214998e3c8be372b7ad641727b25a6ecd7064728d14c4e", kill_on_drop: false }`
[INFO] [stdout] warning: unused import: `process`
[INFO] [stdout]  --> src/lib.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{env, process};
[INFO] [stdout]   |                ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `File`
[INFO] [stdout]  --> src/lib.rs:2:20
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fs::{self,File};
[INFO] [stdout]   |                    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/lib.rs:64:11
[INFO] [stdout]    |
[INFO] [stdout] 64 |         if(!self.backward.contains(&word.to_string())){
[INFO] [stdout]    |           ^                                          ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 64 -         if(!self.backward.contains(&word.to_string())){
[INFO] [stdout] 64 +         if !self.backward.contains(&word.to_string()) {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/lib.rs:187:12
[INFO] [stdout]     |
[INFO] [stdout] 187 |         if (*found == 0){
[INFO] [stdout]     |            ^           ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 187 -         if (*found == 0){
[INFO] [stdout] 187 +         if *found == 0 {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::str::<impl str>::trim_left`: superseded by `trim_start`
[INFO] [stdout]    --> src/lib.rs:128:14
[INFO] [stdout]     |
[INFO] [stdout] 128 |     contents.trim_left().trim_right();
[INFO] [stdout]     |              ^^^^^^^^^ help: replace the use of the deprecated associated function: `trim_start`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::str::<impl str>::trim_right`: superseded by `trim_end`
[INFO] [stdout]    --> src/lib.rs:128:26
[INFO] [stdout]     |
[INFO] [stdout] 128 |     contents.trim_left().trim_right();
[INFO] [stdout]     |                          ^^^^^^^^^^ help: replace the use of the deprecated associated function: `trim_end`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `prelude`
[INFO] [stdout]  --> src/lib.rs:5:28
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::{self, Write, prelude::*};
[INFO] [stdout]   |                            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `g`
[INFO] [stdout]    --> src/lib.rs:164:13
[INFO] [stdout]     |
[INFO] [stdout] 164 |         let g = match io::stdin().read_line(&mut contents) {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_g`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/lib.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |         for i in 0..length{
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lib.rs:93:92
[INFO] [stdout]    |
[INFO] [stdout] 93 |     pub fn helper(&self, answer: &mut Vec<String>, begin_values: usize, end_values: usize, mut found: &mut i32){
[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/lib.rs:121:20
[INFO] [stdout]     |
[INFO] [stdout] 121 | pub fn read_string(mut label_graph: &mut LabelGraph) -> io::Result<()>{
[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/lib.rs:182:13
[INFO] [stdout]     |
[INFO] [stdout] 182 |         let mut found: &mut i32 = &mut 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/lib.rs:184:13
[INFO] [stdout]     |
[INFO] [stdout] 184 |         let mut ans: &mut Vec<String> = &mut Vec::new();
[INFO] [stdout]     |             ----^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling graph v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:255:13
[INFO] [stdout]     |
[INFO] [stdout] 255 |         let mut ans: &mut Vec<String> = &mut Vec::new();
[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/lib.rs:256:13
[INFO] [stdout]     |
[INFO] [stdout] 256 |         let mut found: &mut i32 = &mut 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/lib.rs:262:13
[INFO] [stdout]     |
[INFO] [stdout] 262 |         let mut ans1: &mut Vec<String> = &mut Vec::new();
[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/lib.rs:263:13
[INFO] [stdout]     |
[INFO] [stdout] 263 |         let mut found1: &mut i32 = &mut 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/lib.rs:273:13
[INFO] [stdout]     |
[INFO] [stdout] 273 |         let mut ans2: &mut Vec<String> = &mut Vec::new();
[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/lib.rs:274:13
[INFO] [stdout]     |
[INFO] [stdout] 274 |         let mut found2: &mut i32 = &mut 0;
[INFO] [stdout]     |             ----^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `intgraph_set_1_for_neighbor`
[INFO] [stdout]    --> src/lib.rs:205:8
[INFO] [stdout]     |
[INFO] [stdout] 205 |     fn intgraph_set_1_for_neighbor(){
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `label_graph_helper`
[INFO] [stdout]    --> src/lib.rs:240:8
[INFO] [stdout]     |
[INFO] [stdout] 240 |     fn label_graph_helper(){
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `core::str::<impl str>::trim_right` that must be used
[INFO] [stdout]    --> src/lib.rs:128:5
[INFO] [stdout]     |
[INFO] [stdout] 128 |     contents.trim_left().trim_right();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this returns the trimmed string as a new slice, without modifying the original
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 22 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `process`
[INFO] [stdout]  --> src/lib.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{env, process};
[INFO] [stdout]   |                ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `File`
[INFO] [stdout]  --> src/lib.rs:2:20
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fs::{self,File};
[INFO] [stdout]   |                    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/lib.rs:64:11
[INFO] [stdout]    |
[INFO] [stdout] 64 |         if(!self.backward.contains(&word.to_string())){
[INFO] [stdout]    |           ^                                          ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 64 -         if(!self.backward.contains(&word.to_string())){
[INFO] [stdout] 64 +         if !self.backward.contains(&word.to_string()) {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/lib.rs:187:12
[INFO] [stdout]     |
[INFO] [stdout] 187 |         if (*found == 0){
[INFO] [stdout]     |            ^           ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 187 -         if (*found == 0){
[INFO] [stdout] 187 +         if *found == 0 {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::str::<impl str>::trim_left`: superseded by `trim_start`
[INFO] [stdout]    --> src/lib.rs:128:14
[INFO] [stdout]     |
[INFO] [stdout] 128 |     contents.trim_left().trim_right();
[INFO] [stdout]     |              ^^^^^^^^^ help: replace the use of the deprecated associated function: `trim_start`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::str::<impl str>::trim_right`: superseded by `trim_end`
[INFO] [stdout]    --> src/lib.rs:128:26
[INFO] [stdout]     |
[INFO] [stdout] 128 |     contents.trim_left().trim_right();
[INFO] [stdout]     |                          ^^^^^^^^^^ help: replace the use of the deprecated associated function: `trim_end`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `prelude`
[INFO] [stdout]  --> src/lib.rs:5:28
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::{self, Write, prelude::*};
[INFO] [stdout]   |                            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/main.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let a = lib::read_string(label_graph)?;
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `g`
[INFO] [stdout]  --> src/main.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let g = lib::read_input(label_graph)?;
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_g`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `g`
[INFO] [stdout]    --> src/lib.rs:164:13
[INFO] [stdout]     |
[INFO] [stdout] 164 |         let g = match io::stdin().read_line(&mut contents) {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_g`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/lib.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |         for i in 0..length{
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lib.rs:93:92
[INFO] [stdout]    |
[INFO] [stdout] 93 |     pub fn helper(&self, answer: &mut Vec<String>, begin_values: usize, end_values: usize, mut found: &mut i32){
[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/lib.rs:121:20
[INFO] [stdout]     |
[INFO] [stdout] 121 | pub fn read_string(mut label_graph: &mut LabelGraph) -> io::Result<()>{
[INFO] [stdout]     |                    ----^^^^^^^^^^^
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `process`
[INFO] [stdout]  --> src/lib.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{env, process};
[INFO] [stdout]   |                ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `File`
[INFO] [stdout]  --> src/lib.rs:2:20
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fs::{self,File};
[INFO] [stdout]   |                    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/lib.rs:64:11
[INFO] [stdout]    |
[INFO] [stdout] 64 |         if(!self.backward.contains(&word.to_string())){
[INFO] [stdout]    |           ^                                          ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 64 -         if(!self.backward.contains(&word.to_string())){
[INFO] [stdout] 64 +         if !self.backward.contains(&word.to_string()) {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/lib.rs:187:12
[INFO] [stdout]     |
[INFO] [stdout] 187 |         if (*found == 0){
[INFO] [stdout]     |            ^           ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 187 -         if (*found == 0){
[INFO] [stdout] 187 +         if *found == 0 {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:182:13
[INFO] [stdout]     |
[INFO] [stdout] 182 |         let mut found: &mut i32 = &mut 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/lib.rs:184:13
[INFO] [stdout]     |
[INFO] [stdout] 184 |         let mut ans: &mut Vec<String> = &mut Vec::new();
[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/lib.rs:255:13
[INFO] [stdout]     |
[INFO] [stdout] 255 |         let mut ans: &mut Vec<String> = &mut Vec::new();
[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/lib.rs:256:13
[INFO] [stdout]     |
[INFO] [stdout] 256 |         let mut found: &mut i32 = &mut 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/lib.rs:262:13
[INFO] [stdout]     |
[INFO] [stdout] 262 |         let mut ans1: &mut Vec<String> = &mut Vec::new();
[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/lib.rs:263:13
[INFO] [stdout]     |
[INFO] [stdout] 263 |         let mut found1: &mut i32 = &mut 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/lib.rs:273:13
[INFO] [stdout]     |
[INFO] [stdout] 273 |         let mut ans2: &mut Vec<String> = &mut Vec::new();
[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/lib.rs:274:13
[INFO] [stdout]     |
[INFO] [stdout] 274 |         let mut found2: &mut i32 = &mut 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/main.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut label_graph:&mut lib::LabelGraph = &mut lib::LabelGraph::new();
[INFO] [stdout]   |         ----^^^^^^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_len`
[INFO] [stdout]   --> src/lib.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn get_len(&self) -> usize{
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_contents`
[INFO] [stdout]   --> src/lib.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn get_contents(&self) -> &Vec<Vec<usize>>{
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `intgraph_set_1_for_neighbor`
[INFO] [stdout]    --> src/lib.rs:205:8
[INFO] [stdout]     |
[INFO] [stdout] 205 |     fn intgraph_set_1_for_neighbor(){
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `label_graph_helper`
[INFO] [stdout]    --> src/lib.rs:240:8
[INFO] [stdout]     |
[INFO] [stdout] 240 |     fn label_graph_helper(){
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `core::str::<impl str>::trim_right` that must be used
[INFO] [stdout]    --> src/lib.rs:128:5
[INFO] [stdout]     |
[INFO] [stdout] 128 |     contents.trim_left().trim_right();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this returns the trimmed string as a new slice, without modifying the original
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::str::<impl str>::trim_left`: superseded by `trim_start`
[INFO] [stdout]    --> src/lib.rs:128:14
[INFO] [stdout]     |
[INFO] [stdout] 128 |     contents.trim_left().trim_right();
[INFO] [stdout]     |              ^^^^^^^^^ help: replace the use of the deprecated associated function: `trim_start`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::str::<impl str>::trim_right`: superseded by `trim_end`
[INFO] [stdout]    --> src/lib.rs:128:26
[INFO] [stdout]     |
[INFO] [stdout] 128 |     contents.trim_left().trim_right();
[INFO] [stdout]     |                          ^^^^^^^^^^ help: replace the use of the deprecated associated function: `trim_end`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `prelude`
[INFO] [stdout]  --> src/lib.rs:5:28
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::{self, Write, prelude::*};
[INFO] [stdout]   |                            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `g`
[INFO] [stdout]    --> src/lib.rs:164:13
[INFO] [stdout]     |
[INFO] [stdout] 164 |         let g = match io::stdin().read_line(&mut contents) {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_g`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/lib.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |         for i in 0..length{
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lib.rs:93:92
[INFO] [stdout]    |
[INFO] [stdout] 93 |     pub fn helper(&self, answer: &mut Vec<String>, begin_values: usize, end_values: usize, mut found: &mut i32){
[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/lib.rs:121:20
[INFO] [stdout]     |
[INFO] [stdout] 121 | pub fn read_string(mut label_graph: &mut LabelGraph) -> io::Result<()>{
[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/lib.rs:182:13
[INFO] [stdout]     |
[INFO] [stdout] 182 |         let mut found: &mut i32 = &mut 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/lib.rs:184:13
[INFO] [stdout]     |
[INFO] [stdout] 184 |         let mut ans: &mut Vec<String> = &mut Vec::new();
[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/lib.rs:255:13
[INFO] [stdout]     |
[INFO] [stdout] 255 |         let mut ans: &mut Vec<String> = &mut Vec::new();
[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/lib.rs:256:13
[INFO] [stdout]     |
[INFO] [stdout] 256 |         let mut found: &mut i32 = &mut 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/lib.rs:262:13
[INFO] [stdout]     |
[INFO] [stdout] 262 |         let mut ans1: &mut Vec<String> = &mut Vec::new();
[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/lib.rs:263:13
[INFO] [stdout]     |
[INFO] [stdout] 263 |         let mut found1: &mut i32 = &mut 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/lib.rs:273:13
[INFO] [stdout]     |
[INFO] [stdout] 273 |         let mut ans2: &mut Vec<String> = &mut Vec::new();
[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/lib.rs:274:13
[INFO] [stdout]     |
[INFO] [stdout] 274 |         let mut found2: &mut i32 = &mut 0;
[INFO] [stdout]     |             ----^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `intgraph_set_1_for_neighbor`
[INFO] [stdout]    --> src/lib.rs:205:8
[INFO] [stdout]     |
[INFO] [stdout] 205 |     fn intgraph_set_1_for_neighbor(){
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `label_graph_helper`
[INFO] [stdout]    --> src/lib.rs:240:8
[INFO] [stdout]     |
[INFO] [stdout] 240 |     fn label_graph_helper(){
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `core::str::<impl str>::trim_right` that must be used
[INFO] [stdout]    --> src/lib.rs:128:5
[INFO] [stdout]     |
[INFO] [stdout] 128 |     contents.trim_left().trim_right();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this returns the trimmed string as a new slice, without modifying the original
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 22 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 27 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `Command { std: "docker" "inspect" "e32e803ba229651e9a214998e3c8be372b7ad641727b25a6ecd7064728d14c4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e32e803ba229651e9a214998e3c8be372b7ad641727b25a6ecd7064728d14c4e", kill_on_drop: false }`
[INFO] [stdout] e32e803ba229651e9a214998e3c8be372b7ad641727b25a6ecd7064728d14c4e
[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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 40ccff0da31d0406c7fa837724b9b4e5ea3c5bec52503278f35e6ac560a01225
[INFO] running `Command { std: "docker" "start" "-a" "40ccff0da31d0406c7fa837724b9b4e5ea3c5bec52503278f35e6ac560a01225", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `process`
[INFO] [stderr]  --> src/lib.rs:1:16
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::{env, process};
[INFO] [stderr]   |                ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `File`
[INFO] [stderr]  --> src/lib.rs:2:20
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::fs::{self,File};
[INFO] [stderr]   |                    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/lib.rs:64:11
[INFO] [stderr]    |
[INFO] [stderr] 64 |         if(!self.backward.contains(&word.to_string())){
[INFO] [stderr]    |           ^                                          ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 64 -         if(!self.backward.contains(&word.to_string())){
[INFO] [stderr] 64 +         if !self.backward.contains(&word.to_string()) {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]    --> src/lib.rs:187:12
[INFO] [stderr]     |
[INFO] [stderr] 187 |         if (*found == 0){
[INFO] [stderr]     |            ^           ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 187 -         if (*found == 0){
[INFO] [stderr] 187 +         if *found == 0 {
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `core::str::<impl str>::trim_left`: superseded by `trim_start`
[INFO] [stderr]    --> src/lib.rs:128:14
[INFO] [stderr]     |
[INFO] [stderr] 128 |     contents.trim_left().trim_right();
[INFO] [stderr]     |              ^^^^^^^^^ help: replace the use of the deprecated associated function: `trim_start`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `core::str::<impl str>::trim_right`: superseded by `trim_end`
[INFO] [stderr]    --> src/lib.rs:128:26
[INFO] [stderr]     |
[INFO] [stderr] 128 |     contents.trim_left().trim_right();
[INFO] [stderr]     |                          ^^^^^^^^^^ help: replace the use of the deprecated associated function: `trim_end`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `prelude`
[INFO] [stderr]  --> src/lib.rs:5:28
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::io::{self, Write, prelude::*};
[INFO] [stderr]   |                            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `g`
[INFO] [stderr]    --> src/lib.rs:164:13
[INFO] [stderr]     |
[INFO] [stderr] 164 |         let g = match io::stdin().read_line(&mut contents) {
[INFO] [stderr]     |             ^ help: if this is intentional, prefix it with an underscore: `_g`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/lib.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 |         for i in 0..length{
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:93:92
[INFO] [stderr]    |
[INFO] [stderr] 93 |     pub fn helper(&self, answer: &mut Vec<String>, begin_values: usize, end_values: usize, mut found: &mut i32){
[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: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:121:20
[INFO] [stderr]     |
[INFO] [stderr] 121 | pub fn read_string(mut label_graph: &mut LabelGraph) -> io::Result<()>{
[INFO] [stderr]     |                    ----^^^^^^^^^^^
[INFO] [stderr]     |                    |
[INFO] [stderr]     |                    help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:182:13
[INFO] [stderr]     |
[INFO] [stderr] 182 |         let mut found: &mut i32 = &mut 0;
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:184:13
[INFO] [stderr]     |
[INFO] [stderr] 184 |         let mut ans: &mut Vec<String> = &mut Vec::new();
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:255:13
[INFO] [stderr]     |
[INFO] [stderr] 255 |         let mut ans: &mut Vec<String> = &mut Vec::new();
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:256:13
[INFO] [stderr]     |
[INFO] [stderr] 256 |         let mut found: &mut i32 = &mut 0;
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:262:13
[INFO] [stderr]     |
[INFO] [stderr] 262 |         let mut ans1: &mut Vec<String> = &mut Vec::new();
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:263:13
[INFO] [stderr]     |
[INFO] [stderr] 263 |         let mut found1: &mut i32 = &mut 0;
[INFO] [stderr]     |             ----^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:273:13
[INFO] [stderr]     |
[INFO] [stderr] 273 |         let mut ans2: &mut Vec<String> = &mut Vec::new();
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:274:13
[INFO] [stderr]     |
[INFO] [stderr] 274 |         let mut found2: &mut i32 = &mut 0;
[INFO] [stderr]     |             ----^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `intgraph_set_1_for_neighbor`
[INFO] [stderr]    --> src/lib.rs:205:8
[INFO] [stderr]     |
[INFO] [stderr] 205 |     fn intgraph_set_1_for_neighbor(){
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `label_graph_helper`
[INFO] [stderr]    --> src/lib.rs:240:8
[INFO] [stderr]     |
[INFO] [stderr] 240 |     fn label_graph_helper(){
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `core::str::<impl str>::trim_right` that must be used
[INFO] [stderr]    --> src/lib.rs:128:5
[INFO] [stderr]     |
[INFO] [stderr] 128 |     contents.trim_left().trim_right();
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this returns the trimmed string as a new slice, without modifying the original
[INFO] [stderr] 
[INFO] [stderr] warning: `graph` (lib) generated 22 warnings
[INFO] [stderr] warning: `graph` (lib test) generated 22 warnings (22 duplicates)
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]  --> src/main.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let a = lib::read_string(label_graph)?;
[INFO] [stderr]   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `g`
[INFO] [stderr]  --> src/main.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let g = lib::read_input(label_graph)?;
[INFO] [stderr]   |         ^ help: if this is intentional, prefix it with an underscore: `_g`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `g`
[INFO] [stderr]    --> src/lib.rs:164:13
[INFO] [stderr]     |
[INFO] [stderr] 164 |         let g = match io::stdin().read_line(&mut contents) {
[INFO] [stderr]     |             ^ help: if this is intentional, prefix it with an underscore: `_g`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/main.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let mut label_graph:&mut lib::LabelGraph = &mut lib::LabelGraph::new();
[INFO] [stderr]   |         ----^^^^^^^^^^^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_len`
[INFO] [stderr]   --> src/lib.rs:13:12
[INFO] [stderr]    |
[INFO] [stderr] 13 |     pub fn get_len(&self) -> usize{
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_contents`
[INFO] [stderr]   --> src/lib.rs:17:12
[INFO] [stderr]    |
[INFO] [stderr] 17 |     pub fn get_contents(&self) -> &Vec<Vec<usize>>{
[INFO] [stderr]    |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `intgraph_set_1_for_neighbor`
[INFO] [stderr]    --> src/lib.rs:205:8
[INFO] [stderr]     |
[INFO] [stderr] 205 |     fn intgraph_set_1_for_neighbor(){
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `graph` (bin "graph" test) generated 27 warnings (20 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/graph-674feec24e49d4fd)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test intgraph_set_graph ... ok
[INFO] [stdout] test add_word_test ... ok
[INFO] [stdout] test labelgraph_set_graph ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/graph-f0525201cf16a73f)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test lib::labelgraph_set_graph ... ok
[INFO] [stderr]    Doc-tests graph
[INFO] [stdout] test lib::intgraph_set_graph ... ok
[INFO] [stdout] test lib::add_word_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> /opt/rustwide/workdir/src/lib.rs:64:11
[INFO] [stderr]    |
[INFO] [stderr] 64 |         if(!self.backward.contains(&word.to_string())){
[INFO] [stderr]    |           ^                                          ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 64 -         if(!self.backward.contains(&word.to_string())){
[INFO] [stderr] 64 +         if !self.backward.contains(&word.to_string()) {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]    --> /opt/rustwide/workdir/src/lib.rs:187:12
[INFO] [stderr]     |
[INFO] [stderr] 187 |         if (*found == 0){
[INFO] [stderr]     |            ^           ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 187 -         if (*found == 0){
[INFO] [stderr] 187 +         if *found == 0 {
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "40ccff0da31d0406c7fa837724b9b4e5ea3c5bec52503278f35e6ac560a01225", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40ccff0da31d0406c7fa837724b9b4e5ea3c5bec52503278f35e6ac560a01225", kill_on_drop: false }`
[INFO] [stdout] 40ccff0da31d0406c7fa837724b9b4e5ea3c5bec52503278f35e6ac560a01225