Dec 19 04:38:24.413 INFO checking zerovolts/rust-chat against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 04:38:24.413 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-2/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/zerovolts/rust-chat:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 04:38:24.876 INFO [stdout] b57e716675419067f8136354871ae614a606c9bbef22d3a449d58ebddb58e7d6
Dec 19 04:38:24.878 INFO running `"docker" "start" "-a" "b57e716675419067f8136354871ae614a606c9bbef22d3a449d58ebddb58e7d6"`
Dec 19 04:38:26.380 INFO [stderr]     Checking rust-chat v0.1.0 (/opt/crater/workdir)
Dec 19 04:38:26.520 INFO [stderr] warning: unused import: `Write`
Dec 19 04:38:26.520 INFO [stderr]  --> src/server.rs:3:21
Dec 19 04:38:26.520 INFO [stderr]   |
Dec 19 04:38:26.520 INFO [stderr] 3 | use std::io::{Read, Write};
Dec 19 04:38:26.520 INFO [stderr]   |                     ^^^^^
Dec 19 04:38:26.520 INFO [stderr]   |
Dec 19 04:38:26.520 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 04:38:26.520 INFO [stderr] 
Dec 19 04:38:26.520 INFO [stderr] warning: unused import: `TcpListener`
Dec 19 04:38:26.520 INFO [stderr]  --> src/client.rs:1:16
Dec 19 04:38:26.520 INFO [stderr]   |
Dec 19 04:38:26.520 INFO [stderr] 1 | use std::net::{TcpListener, TcpStream};
Dec 19 04:38:26.520 INFO [stderr]   |                ^^^^^^^^^^^
Dec 19 04:38:26.520 INFO [stderr] 
Dec 19 04:38:26.520 INFO [stderr] warning: unused imports: `Arc`, `Mutex`
Dec 19 04:38:26.520 INFO [stderr]  --> src/client.rs:2:17
Dec 19 04:38:26.520 INFO [stderr]   |
Dec 19 04:38:26.520 INFO [stderr] 2 | use std::sync::{Arc, Mutex};
Dec 19 04:38:26.520 INFO [stderr]   |                 ^^^  ^^^^^
Dec 19 04:38:26.521 INFO [stderr] 
Dec 19 04:38:26.521 INFO [stderr] warning: unused import: `Read`
Dec 19 04:38:26.521 INFO [stderr]  --> src/client.rs:3:15
Dec 19 04:38:26.521 INFO [stderr]   |
Dec 19 04:38:26.521 INFO [stderr] 3 | use std::io::{Read, Write};
Dec 19 04:38:26.521 INFO [stderr]   |               ^^^^
Dec 19 04:38:26.521 INFO [stderr] 
Dec 19 04:38:26.521 INFO [stderr] warning: unused imports: `thread`, `time`
Dec 19 04:38:26.521 INFO [stderr]  --> src/client.rs:4:11
Dec 19 04:38:26.521 INFO [stderr]   |
Dec 19 04:38:26.521 INFO [stderr] 4 | use std::{thread, time};
Dec 19 04:38:26.521 INFO [stderr]   |           ^^^^^^  ^^^^
Dec 19 04:38:26.521 INFO [stderr] 
Dec 19 04:38:26.572 INFO [stderr] warning: unused variable: `e`
Dec 19 04:38:26.572 INFO [stderr]   --> src/server.rs:32:21
Dec 19 04:38:26.572 INFO [stderr]    |
Dec 19 04:38:26.572 INFO [stderr] 32 |                 Err(e) => ()
Dec 19 04:38:26.572 INFO [stderr]    |                     ^ help: consider using `_e` instead
Dec 19 04:38:26.572 INFO [stderr]    |
Dec 19 04:38:26.572 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 04:38:26.573 INFO [stderr] 
Dec 19 04:38:26.588 INFO [stderr] warning: variable does not need to be mutable
Dec 19 04:38:26.588 INFO [stderr]   --> src/server.rs:37:22
Dec 19 04:38:26.588 INFO [stderr]    |
Dec 19 04:38:26.588 INFO [stderr] 37 |     fn handle_client(mut stream: Arc<Mutex<TcpStream>>) {
Dec 19 04:38:26.588 INFO [stderr]    |                      ----^^^^^^
Dec 19 04:38:26.588 INFO [stderr]    |                      |
Dec 19 04:38:26.588 INFO [stderr]    |                      help: remove this `mut`
Dec 19 04:38:26.588 INFO [stderr]    |
Dec 19 04:38:26.588 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 04:38:26.588 INFO [stderr] 
Dec 19 04:38:26.592 INFO [stderr] warning: field is never used: `address`
Dec 19 04:38:26.592 INFO [stderr]  --> src/server.rs:6:5
Dec 19 04:38:26.592 INFO [stderr]   |
Dec 19 04:38:26.592 INFO [stderr] 6 |     address: String,
Dec 19 04:38:26.592 INFO [stderr]   |     ^^^^^^^^^^^^^^^
Dec 19 04:38:26.592 INFO [stderr]   |
Dec 19 04:38:26.592 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 19 04:38:26.592 INFO [stderr] 
Dec 19 04:38:26.592 INFO [stderr] warning: field is never used: `messages`
Dec 19 04:38:26.592 INFO [stderr]  --> src/server.rs:9:5
Dec 19 04:38:26.592 INFO [stderr]   |
Dec 19 04:38:26.592 INFO [stderr] 9 |     messages: Vec<String>
Dec 19 04:38:26.592 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
Dec 19 04:38:26.592 INFO [stderr] 
Dec 19 04:38:26.592 INFO [stderr] warning: field is never used: `address`
Dec 19 04:38:26.592 INFO [stderr]  --> src/client.rs:7:5
Dec 19 04:38:26.592 INFO [stderr]   |
Dec 19 04:38:26.592 INFO [stderr] 7 |     address: String,
Dec 19 04:38:26.592 INFO [stderr]   |     ^^^^^^^^^^^^^^^
Dec 19 04:38:26.592 INFO [stderr] 
Dec 19 04:38:26.604 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 04:38:26.604 INFO [stderr]   --> src/server.rs:39:9
Dec 19 04:38:26.604 INFO [stderr]    |
Dec 19 04:38:26.604 INFO [stderr] 39 |         stream.lock().unwrap().read_to_string(&mut buffer);
Dec 19 04:38:26.604 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 04:38:26.604 INFO [stderr]    |
Dec 19 04:38:26.604 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 04:38:26.604 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 04:38:26.604 INFO [stderr] 
Dec 19 04:38:26.604 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 04:38:26.604 INFO [stderr]   --> src/client.rs:25:9
Dec 19 04:38:26.604 INFO [stderr]    |
Dec 19 04:38:26.604 INFO [stderr] 25 |         self.stream.write(String::from(message).as_bytes());
Dec 19 04:38:26.604 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 04:38:26.604 INFO [stderr]    |
Dec 19 04:38:26.604 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 04:38:26.604 INFO [stderr] 
Dec 19 04:38:26.608 INFO [stderr] warning: unused import: `Write`
Dec 19 04:38:26.608 INFO [stderr]  --> src/server.rs:3:21
Dec 19 04:38:26.608 INFO [stderr]   |
Dec 19 04:38:26.608 INFO [stderr] 3 | use std::io::{Read, Write};
Dec 19 04:38:26.608 INFO [stderr]   |                     ^^^^^
Dec 19 04:38:26.608 INFO [stderr]   |
Dec 19 04:38:26.608 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 04:38:26.608 INFO [stderr] 
Dec 19 04:38:26.608 INFO [stderr] warning: unused import: `TcpListener`
Dec 19 04:38:26.608 INFO [stderr]  --> src/client.rs:1:16
Dec 19 04:38:26.608 INFO [stderr]   |
Dec 19 04:38:26.608 INFO [stderr] 1 | use std::net::{TcpListener, TcpStream};
Dec 19 04:38:26.608 INFO [stderr]   |                ^^^^^^^^^^^
Dec 19 04:38:26.608 INFO [stderr] 
Dec 19 04:38:26.608 INFO [stderr] warning: unused imports: `Arc`, `Mutex`
Dec 19 04:38:26.608 INFO [stderr]  --> src/client.rs:2:17
Dec 19 04:38:26.608 INFO [stderr]   |
Dec 19 04:38:26.608 INFO [stderr] 2 | use std::sync::{Arc, Mutex};
Dec 19 04:38:26.608 INFO [stderr]   |                 ^^^  ^^^^^
Dec 19 04:38:26.608 INFO [stderr] 
Dec 19 04:38:26.608 INFO [stderr] warning: unused import: `Read`
Dec 19 04:38:26.608 INFO [stderr]  --> src/client.rs:3:15
Dec 19 04:38:26.608 INFO [stderr]   |
Dec 19 04:38:26.608 INFO [stderr] 3 | use std::io::{Read, Write};
Dec 19 04:38:26.608 INFO [stderr]   |               ^^^^
Dec 19 04:38:26.608 INFO [stderr] 
Dec 19 04:38:26.608 INFO [stderr] warning: unused imports: `thread`, `time`
Dec 19 04:38:26.608 INFO [stderr]  --> src/client.rs:4:11
Dec 19 04:38:26.609 INFO [stderr]   |
Dec 19 04:38:26.609 INFO [stderr] 4 | use std::{thread, time};
Dec 19 04:38:26.609 INFO [stderr]   |           ^^^^^^  ^^^^
Dec 19 04:38:26.609 INFO [stderr] 
Dec 19 04:38:26.732 INFO [stderr] warning: unused variable: `e`
Dec 19 04:38:26.732 INFO [stderr]   --> src/server.rs:32:21
Dec 19 04:38:26.732 INFO [stderr]    |
Dec 19 04:38:26.732 INFO [stderr] 32 |                 Err(e) => ()
Dec 19 04:38:26.732 INFO [stderr]    |                     ^ help: consider using `_e` instead
Dec 19 04:38:26.732 INFO [stderr]    |
Dec 19 04:38:26.732 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 04:38:26.732 INFO [stderr] 
Dec 19 04:38:26.752 INFO [stderr] warning: variable does not need to be mutable
Dec 19 04:38:26.752 INFO [stderr]   --> src/server.rs:37:22
Dec 19 04:38:26.752 INFO [stderr]    |
Dec 19 04:38:26.752 INFO [stderr] 37 |     fn handle_client(mut stream: Arc<Mutex<TcpStream>>) {
Dec 19 04:38:26.752 INFO [stderr]    |                      ----^^^^^^
Dec 19 04:38:26.752 INFO [stderr]    |                      |
Dec 19 04:38:26.752 INFO [stderr]    |                      help: remove this `mut`
Dec 19 04:38:26.752 INFO [stderr]    |
Dec 19 04:38:26.752 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 04:38:26.752 INFO [stderr] 
Dec 19 04:38:26.752 INFO [stderr] warning: field is never used: `address`
Dec 19 04:38:26.752 INFO [stderr]  --> src/server.rs:6:5
Dec 19 04:38:26.752 INFO [stderr]   |
Dec 19 04:38:26.752 INFO [stderr] 6 |     address: String,
Dec 19 04:38:26.752 INFO [stderr]   |     ^^^^^^^^^^^^^^^
Dec 19 04:38:26.752 INFO [stderr]   |
Dec 19 04:38:26.752 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 19 04:38:26.752 INFO [stderr] 
Dec 19 04:38:26.753 INFO [stderr] warning: field is never used: `messages`
Dec 19 04:38:26.753 INFO [stderr]  --> src/server.rs:9:5
Dec 19 04:38:26.753 INFO [stderr]   |
Dec 19 04:38:26.753 INFO [stderr] 9 |     messages: Vec<String>
Dec 19 04:38:26.753 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
Dec 19 04:38:26.753 INFO [stderr] 
Dec 19 04:38:26.753 INFO [stderr] warning: field is never used: `address`
Dec 19 04:38:26.753 INFO [stderr]  --> src/client.rs:7:5
Dec 19 04:38:26.753 INFO [stderr]   |
Dec 19 04:38:26.753 INFO [stderr] 7 |     address: String,
Dec 19 04:38:26.753 INFO [stderr]   |     ^^^^^^^^^^^^^^^
Dec 19 04:38:26.753 INFO [stderr] 
Dec 19 04:38:26.760 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 04:38:26.760 INFO [stderr]   --> src/server.rs:39:9
Dec 19 04:38:26.760 INFO [stderr]    |
Dec 19 04:38:26.760 INFO [stderr] 39 |         stream.lock().unwrap().read_to_string(&mut buffer);
Dec 19 04:38:26.760 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 04:38:26.760 INFO [stderr]    |
Dec 19 04:38:26.760 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 04:38:26.760 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 04:38:26.760 INFO [stderr] 
Dec 19 04:38:26.760 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 04:38:26.760 INFO [stderr]   --> src/client.rs:25:9
Dec 19 04:38:26.760 INFO [stderr]    |
Dec 19 04:38:26.760 INFO [stderr] 25 |         self.stream.write(String::from(message).as_bytes());
Dec 19 04:38:26.760 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 04:38:26.760 INFO [stderr]    |
Dec 19 04:38:26.760 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 04:38:26.760 INFO [stderr] 
Dec 19 04:38:26.792 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.42s
Dec 19 04:38:28.075 INFO running `"docker" "inspect" "b57e716675419067f8136354871ae614a606c9bbef22d3a449d58ebddb58e7d6"`
Dec 19 04:38:28.370 INFO running `"docker" "rm" "-f" "b57e716675419067f8136354871ae614a606c9bbef22d3a449d58ebddb58e7d6"`
Dec 19 04:38:28.658 INFO [stdout] b57e716675419067f8136354871ae614a606c9bbef22d3a449d58ebddb58e7d6