[INFO] cloning repository https://github.com/Sycinz/communicator_server
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Sycinz/communicator_server" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSycinz%2Fcommunicator_server", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSycinz%2Fcommunicator_server'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 363f2265d91cba7baa6ed1efdc3f8ac3a52c7ee7
[INFO] testing Sycinz/communicator_server against master#cdb45c87e2cd43495379f7e867e3cc15dcee9f93 for pr-145838-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSycinz%2Fcommunicator_server" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Sycinz/communicator_server
[INFO] finished tweaking git repo https://github.com/Sycinz/communicator_server
[INFO] tweaked toml for git repo https://github.com/Sycinz/communicator_server written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Sycinz/communicator_server on toolchain cdb45c87e2cd43495379f7e867e3cc15dcee9f93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Sycinz/communicator_server already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5b209ed826b36c56dfce9d63c174b35e0928010bef8836709eef94f40e08969d
[INFO] running `Command { std: "docker" "start" "-a" "5b209ed826b36c56dfce9d63c174b35e0928010bef8836709eef94f40e08969d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5b209ed826b36c56dfce9d63c174b35e0928010bef8836709eef94f40e08969d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b209ed826b36c56dfce9d63c174b35e0928010bef8836709eef94f40e08969d", kill_on_drop: false }`
[INFO] [stdout] 5b209ed826b36c56dfce9d63c174b35e0928010bef8836709eef94f40e08969d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0b9906be5a8f84bdb1e3396cc13cd7cf8673e8aa4aeac9c744a7a34190a45deb
[INFO] running `Command { std: "docker" "start" "-a" "0b9906be5a8f84bdb1e3396cc13cd7cf8673e8aa4aeac9c744a7a34190a45deb", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]    Compiling serde v1.0.204
[INFO] [stderr]    Compiling serde_json v1.0.120
[INFO] [stderr]    Compiling ryu v1.0.18
[INFO] [stderr]    Compiling itoa v1.0.11
[INFO] [stderr]    Compiling getrandom v0.2.15
[INFO] [stderr]    Compiling uuid v1.10.0
[INFO] [stderr]    Compiling communicator_server v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Write`
[INFO] [stdout]  --> src/main.rs:1:22
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{io::{Read, Write}, net::{TcpListener, TcpStream}};
[INFO] [stdout]   |                      ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::format`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fmt::format;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `uuid`
[INFO] [stdout]  --> src/main.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | use uuid::{uuid, Uuid};
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Value` and `json`
[INFO] [stdout]  --> src/main.rs:4:18
[INFO] [stdout]   |
[INFO] [stdout] 4 | use serde_json::{json, Value};
[INFO] [stdout]   |                  ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nick`
[INFO] [stdout]   --> src/main.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let nick: String = serde_json::from_str(nick_json.as_ref())
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_nick`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let mut user = User {
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `json`
[INFO] [stdout]   --> src/main.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |     let json = String::new();
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_json`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `user`
[INFO] [stdout]   --> src/main.rs:69:36
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let _ = users_list.iter().map(|user| {
[INFO] [stdout]    |                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_user`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `nick`, `image`, `uuid`, `connection`, `permission`, and `rank` are never read
[INFO] [stdout]   --> src/main.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout]  7 | struct User {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout]  8 |     nick: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]  9 |     image: String,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 10 |     uuid: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 11 |     connection: TcpStream,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 12 |     permission: String,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 13 |     rank: String
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Message` is never constructed
[INFO] [stdout]   --> src/main.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | struct Message {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `UsersList` is never constructed
[INFO] [stdout]   --> src/main.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct UsersList {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `USERS` is never used
[INFO] [stdout]   --> src/main.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 | static mut USERS: Vec<String> = vec![];
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.19s
[INFO] running `Command { std: "docker" "inspect" "0b9906be5a8f84bdb1e3396cc13cd7cf8673e8aa4aeac9c744a7a34190a45deb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0b9906be5a8f84bdb1e3396cc13cd7cf8673e8aa4aeac9c744a7a34190a45deb", kill_on_drop: false }`
[INFO] [stdout] 0b9906be5a8f84bdb1e3396cc13cd7cf8673e8aa4aeac9c744a7a34190a45deb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d09e83d3dc3bd41c14a4d49eb5c130379301dfe7f721a8725e3a2b072c602ee8
[INFO] running `Command { std: "docker" "start" "-a" "d09e83d3dc3bd41c14a4d49eb5c130379301dfe7f721a8725e3a2b072c602ee8", kill_on_drop: false }`
[INFO] [stderr]    Compiling communicator_server v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Write`
[INFO] [stdout]  --> src/main.rs:1:22
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{io::{Read, Write}, net::{TcpListener, TcpStream}};
[INFO] [stdout]   |                      ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::format`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fmt::format;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `uuid`
[INFO] [stdout]  --> src/main.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | use uuid::{uuid, Uuid};
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Value` and `json`
[INFO] [stdout]  --> src/main.rs:4:18
[INFO] [stdout]   |
[INFO] [stdout] 4 | use serde_json::{json, Value};
[INFO] [stdout]   |                  ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nick`
[INFO] [stdout]   --> src/main.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let nick: String = serde_json::from_str(nick_json.as_ref())
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_nick`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let mut user = User {
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `json`
[INFO] [stdout]   --> src/main.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |     let json = String::new();
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_json`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `user`
[INFO] [stdout]   --> src/main.rs:69:36
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let _ = users_list.iter().map(|user| {
[INFO] [stdout]    |                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_user`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `nick`, `image`, `uuid`, `connection`, `permission`, and `rank` are never read
[INFO] [stdout]   --> src/main.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout]  7 | struct User {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout]  8 |     nick: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]  9 |     image: String,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 10 |     uuid: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 11 |     connection: TcpStream,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 12 |     permission: String,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 13 |     rank: String
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Message` is never constructed
[INFO] [stdout]   --> src/main.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | struct Message {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `UsersList` is never constructed
[INFO] [stdout]   --> src/main.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct UsersList {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `USERS` is never used
[INFO] [stdout]   --> src/main.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 | static mut USERS: Vec<String> = vec![];
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `Command { std: "docker" "inspect" "d09e83d3dc3bd41c14a4d49eb5c130379301dfe7f721a8725e3a2b072c602ee8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d09e83d3dc3bd41c14a4d49eb5c130379301dfe7f721a8725e3a2b072c602ee8", kill_on_drop: false }`
[INFO] [stdout] d09e83d3dc3bd41c14a4d49eb5c130379301dfe7f721a8725e3a2b072c602ee8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ece5e7ae9ba9aa9946b7ddb1127f3e20cf60c3ad3d5fe3d8b205d046dca4fdbd
[INFO] running `Command { std: "docker" "start" "-a" "ece5e7ae9ba9aa9946b7ddb1127f3e20cf60c3ad3d5fe3d8b205d046dca4fdbd", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `Write`
[INFO] [stderr]  --> src/main.rs:1:22
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::{io::{Read, Write}, net::{TcpListener, TcpStream}};
[INFO] [stderr]   |                      ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt::format`
[INFO] [stderr]  --> src/main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::fmt::format;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `uuid`
[INFO] [stderr]  --> src/main.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | use uuid::{uuid, Uuid};
[INFO] [stderr]   |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Value` and `json`
[INFO] [stderr]  --> src/main.rs:4:18
[INFO] [stderr]   |
[INFO] [stderr] 4 | use serde_json::{json, Value};
[INFO] [stderr]   |                  ^^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `nick`
[INFO] [stderr]   --> src/main.rs:52:9
[INFO] [stderr]    |
[INFO] [stderr] 52 |     let nick: String = serde_json::from_str(nick_json.as_ref())
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_nick`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:39:9
[INFO] [stderr]    |
[INFO] [stderr] 39 |     let mut user = User {
[INFO] [stderr]    |         ----^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `json`
[INFO] [stderr]   --> src/main.rs:67:9
[INFO] [stderr]    |
[INFO] [stderr] 67 |     let json = String::new();
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_json`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `user`
[INFO] [stderr]   --> src/main.rs:69:36
[INFO] [stderr]    |
[INFO] [stderr] 69 |     let _ = users_list.iter().map(|user| {
[INFO] [stderr]    |                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_user`
[INFO] [stderr] 
[INFO] [stderr] warning: fields `nick`, `image`, `uuid`, `connection`, `permission`, and `rank` are never read
[INFO] [stderr]   --> src/main.rs:8:5
[INFO] [stderr]    |
[INFO] [stderr]  7 | struct User {
[INFO] [stderr]    |        ---- fields in this struct
[INFO] [stderr]  8 |     nick: String,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr]  9 |     image: String,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 10 |     uuid: String,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 11 |     connection: TcpStream,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr] 12 |     permission: String,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr] 13 |     rank: String
[INFO] [stderr]    |     ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Message` is never constructed
[INFO] [stderr]   --> src/main.rs:15:8
[INFO] [stderr]    |
[INFO] [stderr] 15 | struct Message {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `UsersList` is never constructed
[INFO] [stderr]   --> src/main.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 | struct UsersList {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static `USERS` is never used
[INFO] [stderr]   --> src/main.rs:25:12
[INFO] [stderr]    |
[INFO] [stderr] 25 | static mut USERS: Vec<String> = vec![];
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `communicator_server` (bin "communicator_server" test) generated 12 warnings (run `cargo fix --bin "communicator_server" --tests` to apply 5 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/communicator_server-c87a678eca8be54a)
[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" "ece5e7ae9ba9aa9946b7ddb1127f3e20cf60c3ad3d5fe3d8b205d046dca4fdbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ece5e7ae9ba9aa9946b7ddb1127f3e20cf60c3ad3d5fe3d8b205d046dca4fdbd", kill_on_drop: false }`
[INFO] [stdout] ece5e7ae9ba9aa9946b7ddb1127f3e20cf60c3ad3d5fe3d8b205d046dca4fdbd