[INFO] cloning repository https://github.com/Basillica/stmp-email-server
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Basillica/stmp-email-server" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBasillica%2Fstmp-email-server", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBasillica%2Fstmp-email-server'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 094887a7e7056eb09d1f8dc29262ec3ec9eb764e
[INFO] checking Basillica/stmp-email-server against master#a26e97be8826d408309fffbd8168362365719f50 for pr-136776
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBasillica%2Fstmp-email-server" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Basillica/stmp-email-server on toolchain a26e97be8826d408309fffbd8168362365719f50
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a26e97be8826d408309fffbd8168362365719f50" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Basillica/stmp-email-server
[INFO] finished tweaking git repo https://github.com/Basillica/stmp-email-server
[INFO] tweaked toml for git repo https://github.com/Basillica/stmp-email-server written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Basillica/stmp-email-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" "+a26e97be8826d408309fffbd8168362365719f50" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded openssl-sys v0.9.103
[INFO] [stderr]   Downloaded openssl v0.10.66
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+a26e97be8826d408309fffbd8168362365719f50" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a69c15bbf5761ea42ead0982003ef251c3e7fe8c4627271ce1b51380c030a817
[INFO] running `Command { std: "docker" "start" "-a" "a69c15bbf5761ea42ead0982003ef251c3e7fe8c4627271ce1b51380c030a817", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a69c15bbf5761ea42ead0982003ef251c3e7fe8c4627271ce1b51380c030a817", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a69c15bbf5761ea42ead0982003ef251c3e7fe8c4627271ce1b51380c030a817", kill_on_drop: false }`
[INFO] [stdout] a69c15bbf5761ea42ead0982003ef251c3e7fe8c4627271ce1b51380c030a817
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+a26e97be8826d408309fffbd8168362365719f50" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ce09392cf57238d7e5f4d0d8af9f75b92a14527c357965eec52bc6c88a85d088
[INFO] running `Command { std: "docker" "start" "-a" "ce09392cf57238d7e5f4d0d8af9f75b92a14527c357965eec52bc6c88a85d088", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.1.13
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]    Compiling pkg-config v0.3.30
[INFO] [stderr]    Compiling libc v0.2.158
[INFO] [stderr]    Compiling openssl v0.10.66
[INFO] [stderr]    Compiling native-tls v0.2.12
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]    Compiling syn v2.0.75
[INFO] [stderr]    Compiling openssl-sys v0.9.103
[INFO] [stderr]    Compiling openssl-macros v0.1.1
[INFO] [stderr]     Checking stmp-server v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::connection_handler::ConnectionHandler`
[INFO] [stdout]  --> src/smtp_server.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use crate::connection_handler::ConnectionHandler;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Read` and `Write`
[INFO] [stdout]  --> src/connection_handler.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::{Read, Write};
[INFO] [stdout]   |               ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sync::Arc`
[INFO] [stdout]  --> src/encryption.rs:1:27
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{net::TcpStream, sync::Arc};
[INFO] [stdout]   |                           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `buf`
[INFO] [stdout]   --> src/connection_handler.rs:15:28
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn read(&mut self, buf: &mut [u8]) -> Result<(), std::io::Error> {
[INFO] [stdout]    |                            ^^^ help: if this is intentional, prefix it with an underscore: `_buf`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `buf`
[INFO] [stdout]   --> src/connection_handler.rs:22:29
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn write(&mut self, buf: &[u8]) -> Result<(), std::io::Error> {
[INFO] [stdout]    |                             ^^^ help: if this is intentional, prefix it with an underscore: `_buf`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `state` is assigned to, but never used
[INFO] [stdout]   --> src/command_parser.rs:81:13
[INFO] [stdout]    |
[INFO] [stdout] 81 |     let mut state = ClientState::new();
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_state` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `from`
[INFO] [stdout]    --> src/command_parser.rs:111:31
[INFO] [stdout]     |
[INFO] [stdout] 111 |             SmtpCommand::Mail(from) => {
[INFO] [stdout]     |                               ^^^^ help: if this is intentional, prefix it with an underscore: `_from`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `to`
[INFO] [stdout]    --> src/command_parser.rs:116:31
[INFO] [stdout]     |
[INFO] [stdout] 116 |             SmtpCommand::Rcpt(to) => {
[INFO] [stdout]     |                               ^^ help: if this is intentional, prefix it with an underscore: `_to`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `state` is never read
[INFO] [stdout]    --> src/command_parser.rs:128:17
[INFO] [stdout]     |
[INFO] [stdout] 128 |                 state = ClientState::new();
[INFO] [stdout]     |                 ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `command`
[INFO] [stdout]    --> src/command_parser.rs:140:34
[INFO] [stdout]     |
[INFO] [stdout] 140 |             SmtpCommand::Unknown(command) => {
[INFO] [stdout]     |                                  ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_command`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message_delivery`
[INFO] [stdout]   --> src/command_parser.rs:69:5
[INFO] [stdout]    |
[INFO] [stdout] 69 |     message_delivery: MessageDelivery,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message_delivery`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `encryption`
[INFO] [stdout]   --> src/command_parser.rs:71:5
[INFO] [stdout]    |
[INFO] [stdout] 71 |     encryption: Encryption,
[INFO] [stdout]    |     ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_encryption`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/command_parser.rs:68:5
[INFO] [stdout]    |
[INFO] [stdout] 68 |     mut stream: TcpStream,
[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 variable: `recipients`
[INFO] [stdout]   --> src/message_delivery.rs:15:27
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn deliver(&self, recipients: &[String], message: &[u8]) -> Result<(), DeliveryError> {
[INFO] [stdout]    |                           ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_recipients`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]   --> src/message_delivery.rs:15:50
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn deliver(&self, recipients: &[String], message: &[u8]) -> Result<(), DeliveryError> {
[INFO] [stdout]    |                                                  ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mechanism`
[INFO] [stdout]   --> src/authentication.rs:21:32
[INFO] [stdout]    |
[INFO] [stdout] 21 |     pub fn authenticate(&self, mechanism: &AuthMechanism, credentials: &[u8]) -> Result<(), AuthError> {
[INFO] [stdout]    |                                ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mechanism`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `credentials`
[INFO] [stdout]   --> src/authentication.rs:21:59
[INFO] [stdout]    |
[INFO] [stdout] 21 |     pub fn authenticate(&self, mechanism: &AuthMechanism, credentials: &[u8]) -> Result<(), AuthError> {
[INFO] [stdout]    |                                                           ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_credentials`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `protocol`
[INFO] [stdout]   --> src/encryption.rs:23:29
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub fn negotiate(&self, protocol: &EncryptionProtocol, stream: &mut TcpStream) -> Result<(), EncryptionError> {
[INFO] [stdout]    |                             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_protocol`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stream`
[INFO] [stdout]   --> src/encryption.rs:23:60
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub fn negotiate(&self, protocol: &EncryptionProtocol, stream: &mut TcpStream) -> Result<(), EncryptionError> {
[INFO] [stdout]    |                                                            ^^^^^^ help: if this is intentional, prefix it with an underscore: `_stream`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::connection_handler::ConnectionHandler`
[INFO] [stdout]  --> src/smtp_server.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use crate::connection_handler::ConnectionHandler;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Read` and `Write`
[INFO] [stdout]  --> src/connection_handler.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::{Read, Write};
[INFO] [stdout]   |               ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sync::Arc`
[INFO] [stdout]  --> src/encryption.rs:1:27
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{net::TcpStream, sync::Arc};
[INFO] [stdout]   |                           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `authenticated`, `sender`, and `recipients` are never read
[INFO] [stdout]   --> src/smtp_server.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct ClientState {
[INFO] [stdout]    |            ----------- fields in this struct
[INFO] [stdout] 16 |     authenticated: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 17 |     sender: Option<String>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 18 |     recipients: Vec<String>,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id` and `thread` are never read
[INFO] [stdout]   --> src/smtp_server.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 32 | struct Worker {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 33 |     id: usize,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 34 |     thread: Option<thread::JoinHandle<()>>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `workers` is never read
[INFO] [stdout]   --> src/smtp_server.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 53 | pub struct ThreadPool {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 54 |     workers: Vec<Worker>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `timeout` is never read
[INFO] [stdout]   --> src/smtp_server.rs:87:5
[INFO] [stdout]    |
[INFO] [stdout] 84 | pub struct SmtpServer {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 87 |     timeout: Duration,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ConnectionHandler` is never constructed
[INFO] [stdout]  --> src/connection_handler.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct ConnectionHandler {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `read`, `write`, and `close` are never used
[INFO] [stdout]   --> src/connection_handler.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl ConnectionHandler {
[INFO] [stdout]    | ---------------------- associated items in this implementation
[INFO] [stdout] 11 |     pub fn new(stream: TcpStream, timeout: Duration) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 15 |     pub fn read(&mut self, buf: &mut [u8]) -> Result<(), std::io::Error> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     pub fn write(&mut self, buf: &[u8]) -> Result<(), std::io::Error> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |     pub fn close(&mut self) -> Result<(), std::io::Error> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Auth` is never constructed
[INFO] [stdout]   --> src/command_parser.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub enum SmtpCommand<'a> {
[INFO] [stdout]    |          ----------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 22 |     Auth(AuthMechanism, &'a [u8]),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `BadError` is never constructed
[INFO] [stdout]   --> src/command_parser.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub enum ParseError {
[INFO] [stdout]    |          ---------- variant in this enum
[INFO] [stdout] 27 |     BadError,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ParseError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `deliver_message` is never used
[INFO] [stdout]    --> src/command_parser.rs:151:4
[INFO] [stdout]     |
[INFO] [stdout] 151 | fn deliver_message(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `authenticate` is never used
[INFO] [stdout]    --> src/command_parser.rs:160:4
[INFO] [stdout]     |
[INFO] [stdout] 160 | fn authenticate(
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `negotiate_encryption` is never used
[INFO] [stdout]    --> src/command_parser.rs:169:4
[INFO] [stdout]     |
[INFO] [stdout] 169 | fn negotiate_encryption(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `relay_host` is never read
[INFO] [stdout]  --> src/message_delivery.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct MessageDelivery {
[INFO] [stdout]   |            --------------- field in this struct
[INFO] [stdout] 5 |     relay_host: SocketAddr,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `MessageDelivery` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `DeliveryError` is never constructed
[INFO] [stdout]  --> src/message_delivery.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct DeliveryError;
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `deliver` is never used
[INFO] [stdout]   --> src/message_delivery.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl MessageDelivery {
[INFO] [stdout]    | -------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 15 |     pub fn deliver(&self, recipients: &[String], message: &[u8]) -> Result<(), DeliveryError> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `mechanisms` is never read
[INFO] [stdout]   --> src/authentication.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 9  | pub struct Authentication {
[INFO] [stdout]    |            -------------- field in this struct
[INFO] [stdout] 10 |     mechanisms: Vec<AuthMechanism>,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Authentication` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `protocols` is never read
[INFO] [stdout]   --> src/encryption.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Encryption {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 11 |     protocols: Vec<EncryptionProtocol>,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Encryption` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `EncryptionError` is never constructed
[INFO] [stdout]   --> src/encryption.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub struct EncryptionError;
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `negotiate` is never used
[INFO] [stdout]   --> src/encryption.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl Encryption {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub fn negotiate(&self, protocol: &EncryptionProtocol, stream: &mut TcpStream) -> Result<(), EncryptionError> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `ConnectionError`, `ParseError`, `AuthenticationError`, `DeliveryError`, and `EncryptionError` are never constructed
[INFO] [stdout]   --> src/error_handling.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub enum SmtpErrorKind {
[INFO] [stdout]    |          ------------- variants in this enum
[INFO] [stdout] 12 |     ConnectionError,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 13 |     ParseError,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 14 |     AuthenticationError,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 15 |     DeliveryError,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 16 |     EncryptionError,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SmtpErrorKind` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/command_parser.rs:108:17
[INFO] [stdout]     |
[INFO] [stdout] 108 |                 authentication.authenticate(&mechanism, &credentials);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 108 |                 let _ = authentication.authenticate(&mechanism, &credentials);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `buf`
[INFO] [stdout]   --> src/connection_handler.rs:15:28
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn read(&mut self, buf: &mut [u8]) -> Result<(), std::io::Error> {
[INFO] [stdout]    |                            ^^^ help: if this is intentional, prefix it with an underscore: `_buf`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `buf`
[INFO] [stdout]   --> src/connection_handler.rs:22:29
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn write(&mut self, buf: &[u8]) -> Result<(), std::io::Error> {
[INFO] [stdout]    |                             ^^^ help: if this is intentional, prefix it with an underscore: `_buf`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `state` is assigned to, but never used
[INFO] [stdout]   --> src/command_parser.rs:81:13
[INFO] [stdout]    |
[INFO] [stdout] 81 |     let mut state = ClientState::new();
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_state` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `from`
[INFO] [stdout]    --> src/command_parser.rs:111:31
[INFO] [stdout]     |
[INFO] [stdout] 111 |             SmtpCommand::Mail(from) => {
[INFO] [stdout]     |                               ^^^^ help: if this is intentional, prefix it with an underscore: `_from`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `to`
[INFO] [stdout]    --> src/command_parser.rs:116:31
[INFO] [stdout]     |
[INFO] [stdout] 116 |             SmtpCommand::Rcpt(to) => {
[INFO] [stdout]     |                               ^^ help: if this is intentional, prefix it with an underscore: `_to`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `state` is never read
[INFO] [stdout]    --> src/command_parser.rs:128:17
[INFO] [stdout]     |
[INFO] [stdout] 128 |                 state = ClientState::new();
[INFO] [stdout]     |                 ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `command`
[INFO] [stdout]    --> src/command_parser.rs:140:34
[INFO] [stdout]     |
[INFO] [stdout] 140 |             SmtpCommand::Unknown(command) => {
[INFO] [stdout]     |                                  ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_command`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message_delivery`
[INFO] [stdout]   --> src/command_parser.rs:69:5
[INFO] [stdout]    |
[INFO] [stdout] 69 |     message_delivery: MessageDelivery,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message_delivery`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `encryption`
[INFO] [stdout]   --> src/command_parser.rs:71:5
[INFO] [stdout]    |
[INFO] [stdout] 71 |     encryption: Encryption,
[INFO] [stdout]    |     ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_encryption`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/command_parser.rs:68:5
[INFO] [stdout]    |
[INFO] [stdout] 68 |     mut stream: TcpStream,
[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 variable: `recipients`
[INFO] [stdout]   --> src/message_delivery.rs:15:27
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn deliver(&self, recipients: &[String], message: &[u8]) -> Result<(), DeliveryError> {
[INFO] [stdout]    |                           ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_recipients`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]   --> src/message_delivery.rs:15:50
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn deliver(&self, recipients: &[String], message: &[u8]) -> Result<(), DeliveryError> {
[INFO] [stdout]    |                                                  ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mechanism`
[INFO] [stdout]   --> src/authentication.rs:21:32
[INFO] [stdout]    |
[INFO] [stdout] 21 |     pub fn authenticate(&self, mechanism: &AuthMechanism, credentials: &[u8]) -> Result<(), AuthError> {
[INFO] [stdout]    |                                ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mechanism`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `credentials`
[INFO] [stdout]   --> src/authentication.rs:21:59
[INFO] [stdout]    |
[INFO] [stdout] 21 |     pub fn authenticate(&self, mechanism: &AuthMechanism, credentials: &[u8]) -> Result<(), AuthError> {
[INFO] [stdout]    |                                                           ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_credentials`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `protocol`
[INFO] [stdout]   --> src/encryption.rs:23:29
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub fn negotiate(&self, protocol: &EncryptionProtocol, stream: &mut TcpStream) -> Result<(), EncryptionError> {
[INFO] [stdout]    |                             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_protocol`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stream`
[INFO] [stdout]   --> src/encryption.rs:23:60
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub fn negotiate(&self, protocol: &EncryptionProtocol, stream: &mut TcpStream) -> Result<(), EncryptionError> {
[INFO] [stdout]    |                                                            ^^^^^^ help: if this is intentional, prefix it with an underscore: `_stream`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `authenticated`, `sender`, and `recipients` are never read
[INFO] [stdout]   --> src/smtp_server.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct ClientState {
[INFO] [stdout]    |            ----------- fields in this struct
[INFO] [stdout] 16 |     authenticated: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 17 |     sender: Option<String>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 18 |     recipients: Vec<String>,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id` and `thread` are never read
[INFO] [stdout]   --> src/smtp_server.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 32 | struct Worker {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 33 |     id: usize,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 34 |     thread: Option<thread::JoinHandle<()>>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `workers` is never read
[INFO] [stdout]   --> src/smtp_server.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 53 | pub struct ThreadPool {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 54 |     workers: Vec<Worker>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `timeout` is never read
[INFO] [stdout]   --> src/smtp_server.rs:87:5
[INFO] [stdout]    |
[INFO] [stdout] 84 | pub struct SmtpServer {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 87 |     timeout: Duration,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ConnectionHandler` is never constructed
[INFO] [stdout]  --> src/connection_handler.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct ConnectionHandler {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `read`, `write`, and `close` are never used
[INFO] [stdout]   --> src/connection_handler.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl ConnectionHandler {
[INFO] [stdout]    | ---------------------- associated items in this implementation
[INFO] [stdout] 11 |     pub fn new(stream: TcpStream, timeout: Duration) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 15 |     pub fn read(&mut self, buf: &mut [u8]) -> Result<(), std::io::Error> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     pub fn write(&mut self, buf: &[u8]) -> Result<(), std::io::Error> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |     pub fn close(&mut self) -> Result<(), std::io::Error> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Auth` is never constructed
[INFO] [stdout]   --> src/command_parser.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub enum SmtpCommand<'a> {
[INFO] [stdout]    |          ----------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 22 |     Auth(AuthMechanism, &'a [u8]),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `BadError` is never constructed
[INFO] [stdout]   --> src/command_parser.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub enum ParseError {
[INFO] [stdout]    |          ---------- variant in this enum
[INFO] [stdout] 27 |     BadError,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ParseError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `deliver_message` is never used
[INFO] [stdout]    --> src/command_parser.rs:151:4
[INFO] [stdout]     |
[INFO] [stdout] 151 | fn deliver_message(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `authenticate` is never used
[INFO] [stdout]    --> src/command_parser.rs:160:4
[INFO] [stdout]     |
[INFO] [stdout] 160 | fn authenticate(
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `negotiate_encryption` is never used
[INFO] [stdout]    --> src/command_parser.rs:169:4
[INFO] [stdout]     |
[INFO] [stdout] 169 | fn negotiate_encryption(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `relay_host` is never read
[INFO] [stdout]  --> src/message_delivery.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct MessageDelivery {
[INFO] [stdout]   |            --------------- field in this struct
[INFO] [stdout] 5 |     relay_host: SocketAddr,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `MessageDelivery` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `DeliveryError` is never constructed
[INFO] [stdout]  --> src/message_delivery.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct DeliveryError;
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `deliver` is never used
[INFO] [stdout]   --> src/message_delivery.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl MessageDelivery {
[INFO] [stdout]    | -------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 15 |     pub fn deliver(&self, recipients: &[String], message: &[u8]) -> Result<(), DeliveryError> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `mechanisms` is never read
[INFO] [stdout]   --> src/authentication.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 9  | pub struct Authentication {
[INFO] [stdout]    |            -------------- field in this struct
[INFO] [stdout] 10 |     mechanisms: Vec<AuthMechanism>,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Authentication` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `protocols` is never read
[INFO] [stdout]   --> src/encryption.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Encryption {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 11 |     protocols: Vec<EncryptionProtocol>,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Encryption` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `EncryptionError` is never constructed
[INFO] [stdout]   --> src/encryption.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub struct EncryptionError;
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `negotiate` is never used
[INFO] [stdout]   --> src/encryption.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl Encryption {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub fn negotiate(&self, protocol: &EncryptionProtocol, stream: &mut TcpStream) -> Result<(), EncryptionError> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `ConnectionError`, `ParseError`, `AuthenticationError`, `DeliveryError`, and `EncryptionError` are never constructed
[INFO] [stdout]   --> src/error_handling.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub enum SmtpErrorKind {
[INFO] [stdout]    |          ------------- variants in this enum
[INFO] [stdout] 12 |     ConnectionError,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 13 |     ParseError,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 14 |     AuthenticationError,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 15 |     DeliveryError,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 16 |     EncryptionError,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SmtpErrorKind` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/command_parser.rs:108:17
[INFO] [stdout]     |
[INFO] [stdout] 108 |                 authentication.authenticate(&mechanism, &credentials);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 108 |                 let _ = authentication.authenticate(&mechanism, &credentials);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.73s
[INFO] running `Command { std: "docker" "inspect" "ce09392cf57238d7e5f4d0d8af9f75b92a14527c357965eec52bc6c88a85d088", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce09392cf57238d7e5f4d0d8af9f75b92a14527c357965eec52bc6c88a85d088", kill_on_drop: false }`
[INFO] [stdout] ce09392cf57238d7e5f4d0d8af9f75b92a14527c357965eec52bc6c88a85d088
