[INFO] updating cached repository zerovolts/rust-chat
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/zerovolts/rust-chat
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/zerovolts/rust-chat" "work/ex/pr-56896/sources/master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980/gh/zerovolts/rust-chat"`
[INFO] [stderr] Cloning into 'work/ex/pr-56896/sources/master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980/gh/zerovolts/rust-chat'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/zerovolts/rust-chat" "work/ex/pr-56896/sources/try#bad365140e1e8233b42b21af70a407f14ce5fec5/gh/zerovolts/rust-chat"`
[INFO] [stderr] Cloning into 'work/ex/pr-56896/sources/try#bad365140e1e8233b42b21af70a407f14ce5fec5/gh/zerovolts/rust-chat'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 334cd14c9719c6d039b62c9c6285564237769ad3
[INFO] sha for GitHub repo zerovolts/rust-chat: 334cd14c9719c6d039b62c9c6285564237769ad3
[INFO] validating manifest of zerovolts/rust-chat on toolchain master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+adbfec229ce07ff4b2a7bf2d6dec2d13cb224980-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of zerovolts/rust-chat on toolchain try#bad365140e1e8233b42b21af70a407f14ce5fec5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bad365140e1e8233b42b21af70a407f14ce5fec5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing zerovolts/rust-chat
[INFO] finished frobbing zerovolts/rust-chat
[INFO] frobbed toml for zerovolts/rust-chat written to work/ex/pr-56896/sources/master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980/gh/zerovolts/rust-chat/Cargo.toml
[INFO] started frobbing zerovolts/rust-chat
[INFO] finished frobbing zerovolts/rust-chat
[INFO] frobbed toml for zerovolts/rust-chat written to work/ex/pr-56896/sources/try#bad365140e1e8233b42b21af70a407f14ce5fec5/gh/zerovolts/rust-chat/Cargo.toml
[INFO] crate zerovolts/rust-chat has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+adbfec229ce07ff4b2a7bf2d6dec2d13cb224980-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bad365140e1e8233b42b21af70a407f14ce5fec5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking zerovolts/rust-chat against try#bad365140e1e8233b42b21af70a407f14ce5fec5 for pr-56896
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56896/worker-5/try#bad365140e1e8233b42b21af70a407f14ce5fec5:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56896/sources/try#bad365140e1e8233b42b21af70a407f14ce5fec5/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" "+bad365140e1e8233b42b21af70a407f14ce5fec5-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 5f6ba3a3d79ff1f55ab71ce9d2de4dba85adbd66fa12a2e32b08e4a806e2edd6
[INFO] running `"docker" "start" "-a" "5f6ba3a3d79ff1f55ab71ce9d2de4dba85adbd66fa12a2e32b08e4a806e2edd6"`
[INFO] [stderr]     Checking rust-chat v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Write`
[INFO] [stderr]  --> src/server.rs:3:21
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::io::{Read, Write};
[INFO] [stderr]   |                     ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `TcpListener`
[INFO] [stderr]  --> src/client.rs:1:16
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::net::{TcpListener, TcpStream};
[INFO] [stderr]   |                ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Arc`, `Mutex`
[INFO] [stderr]  --> src/client.rs:2:17
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::sync::{Arc, Mutex};
[INFO] [stderr]   |                 ^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Read`
[INFO] [stderr]  --> src/client.rs:3:15
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::io::{Read, Write};
[INFO] [stderr]   |               ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `thread`, `time`
[INFO] [stderr]  --> src/client.rs:4:11
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::{thread, time};
[INFO] [stderr]   |           ^^^^^^  ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/server.rs:32:21
[INFO] [stderr]    |
[INFO] [stderr] 32 |                 Err(e) => ()
[INFO] [stderr]    |                     ^ help: consider using `_e` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/server.rs:37:22
[INFO] [stderr]    |
[INFO] [stderr] 37 |     fn handle_client(mut stream: Arc<Mutex<TcpStream>>) {
[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: field is never used: `address`
[INFO] [stderr]  --> src/server.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     address: String,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `messages`
[INFO] [stderr]  --> src/server.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     messages: Vec<String>
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `address`
[INFO] [stderr]  --> src/client.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     address: String,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Write`
[INFO] [stderr]  --> src/server.rs:3:21
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::io::{Read, Write};
[INFO] [stderr]   |                     ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `TcpListener`
[INFO] [stderr]  --> src/client.rs:1:16
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::net::{TcpListener, TcpStream};
[INFO] [stderr]   |                ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Arc`, `Mutex`
[INFO] [stderr]  --> src/client.rs:2:17
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::sync::{Arc, Mutex};
[INFO] [stderr]   |                 ^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Read`
[INFO] [stderr]  --> src/client.rs:3:15
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::io::{Read, Write};
[INFO] [stderr]   |               ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `thread`, `time`
[INFO] [stderr]  --> src/client.rs:4:11
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::{thread, time};
[INFO] [stderr]   |           ^^^^^^  ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/server.rs:39:9
[INFO] [stderr]    |
[INFO] [stderr] 39 |         stream.lock().unwrap().read_to_string(&mut buffer);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/client.rs:25:9
[INFO] [stderr]    |
[INFO] [stderr] 25 |         self.stream.write(String::from(message).as_bytes());
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/server.rs:32:21
[INFO] [stderr]    |
[INFO] [stderr] 32 |                 Err(e) => ()
[INFO] [stderr]    |                     ^ help: consider using `_e` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/server.rs:37:22
[INFO] [stderr]    |
[INFO] [stderr] 37 |     fn handle_client(mut stream: Arc<Mutex<TcpStream>>) {
[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: field is never used: `address`
[INFO] [stderr]  --> src/server.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     address: String,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `messages`
[INFO] [stderr]  --> src/server.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     messages: Vec<String>
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `address`
[INFO] [stderr]  --> src/client.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     address: String,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/server.rs:39:9
[INFO] [stderr]    |
[INFO] [stderr] 39 |         stream.lock().unwrap().read_to_string(&mut buffer);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/client.rs:25:9
[INFO] [stderr]    |
[INFO] [stderr] 25 |         self.stream.write(String::from(message).as_bytes());
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `"docker" "inspect" "5f6ba3a3d79ff1f55ab71ce9d2de4dba85adbd66fa12a2e32b08e4a806e2edd6"`
[INFO] running `"docker" "rm" "-f" "5f6ba3a3d79ff1f55ab71ce9d2de4dba85adbd66fa12a2e32b08e4a806e2edd6"`
[INFO] [stdout] 5f6ba3a3d79ff1f55ab71ce9d2de4dba85adbd66fa12a2e32b08e4a806e2edd6