Dec 17 19:56:11.792 INFO checking mattyw/rust-udp-play against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 17 19:56:11.792 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-4/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/gh/mattyw/rust-udp-play:/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 19:56:12.218 INFO [stdout] cc06c8cce7dbf0ccacf89ba70b0be87de2e2f1c64ae2a6e9aa5c22769c97f246
Dec 17 19:56:12.220 INFO running `"docker" "start" "-a" "cc06c8cce7dbf0ccacf89ba70b0be87de2e2f1c64ae2a6e9aa5c22769c97f246"`
Dec 17 19:56:14.517 INFO [stderr]     Checking hello v0.1.0 (/opt/crater/workdir)
Dec 17 19:56:14.908 INFO [stderr] warning: unused imports: `Receiver`, `Sender`
Dec 17 19:56:14.908 INFO [stderr]  --> src/main.rs:3:23
Dec 17 19:56:14.908 INFO [stderr]   |
Dec 17 19:56:14.908 INFO [stderr] 3 | use std::sync::mpsc::{Sender, Receiver};
Dec 17 19:56:14.908 INFO [stderr]   |                       ^^^^^^  ^^^^^^^^
Dec 17 19:56:14.908 INFO [stderr]   |
Dec 17 19:56:14.908 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 17 19:56:14.908 INFO [stderr] 
Dec 17 19:56:14.908 INFO [stderr] warning: unused import: `std::sync::mpsc`
Dec 17 19:56:14.908 INFO [stderr]  --> src/main.rs:4:5
Dec 17 19:56:14.908 INFO [stderr]   |
Dec 17 19:56:14.908 INFO [stderr] 4 | use std::sync::mpsc;
Dec 17 19:56:14.908 INFO [stderr]   |     ^^^^^^^^^^^^^^^
Dec 17 19:56:14.908 INFO [stderr] 
Dec 17 19:56:14.980 INFO [stderr] warning: unused imports: `Receiver`, `Sender`
Dec 17 19:56:14.980 INFO [stderr]  --> src/main.rs:3:23
Dec 17 19:56:14.980 INFO [stderr]   |
Dec 17 19:56:14.980 INFO [stderr] 3 | use std::sync::mpsc::{Sender, Receiver};
Dec 17 19:56:14.980 INFO [stderr]   |                       ^^^^^^  ^^^^^^^^
Dec 17 19:56:14.980 INFO [stderr]   |
Dec 17 19:56:14.980 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 17 19:56:14.980 INFO [stderr] 
Dec 17 19:56:14.980 INFO [stderr] warning: unused import: `std::sync::mpsc`
Dec 17 19:56:14.980 INFO [stderr]  --> src/main.rs:4:5
Dec 17 19:56:14.980 INFO [stderr]   |
Dec 17 19:56:14.980 INFO [stderr] 4 | use std::sync::mpsc;
Dec 17 19:56:14.980 INFO [stderr]   |     ^^^^^^^^^^^^^^^
Dec 17 19:56:14.980 INFO [stderr] 
Dec 17 19:56:15.048 INFO [stderr] warning: unused variable: `i`
Dec 17 19:56:15.048 INFO [stderr]   --> src/main.rs:38:9
Dec 17 19:56:15.048 INFO [stderr]    |
Dec 17 19:56:15.048 INFO [stderr] 38 |     for i in 0..50 {
Dec 17 19:56:15.048 INFO [stderr]    |         ^ help: consider using `_i` instead
Dec 17 19:56:15.064 INFO [stderr]    |
Dec 17 19:56:15.064 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 17 19:56:15.064 INFO [stderr] 
Dec 17 19:56:15.064 INFO [stderr] warning: unused variable: `listen_on`
Dec 17 19:56:15.064 INFO [stderr]   --> src/main.rs:37:52
Dec 17 19:56:15.064 INFO [stderr]    |
Dec 17 19:56:15.064 INFO [stderr] 37 | fn listen(server_name: &str, sock: net::UdpSocket, listen_on: net::SocketAddr) {
Dec 17 19:56:15.064 INFO [stderr]    |                                                    ^^^^^^^^^ help: consider using `_listen_on` instead
Dec 17 19:56:15.064 INFO [stderr] 
Dec 17 19:56:15.064 INFO [stderr] warning: variable does not need to be mutable
Dec 17 19:56:15.064 INFO [stderr]  --> src/main.rs:8:9
Dec 17 19:56:15.064 INFO [stderr]   |
Dec 17 19:56:15.064 INFO [stderr] 8 |     let mut socket;
Dec 17 19:56:15.064 INFO [stderr]   |         ----^^^^^^
Dec 17 19:56:15.064 INFO [stderr]   |         |
Dec 17 19:56:15.064 INFO [stderr]   |         help: remove this `mut`
Dec 17 19:56:15.064 INFO [stderr]   |
Dec 17 19:56:15.064 INFO [stderr]   = note: #[warn(unused_mut)] on by default
Dec 17 19:56:15.064 INFO [stderr] 
Dec 17 19:56:15.096 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 19:56:15.096 INFO [stderr]   --> src/main.rs:44:5
Dec 17 19:56:15.096 INFO [stderr]    |
Dec 17 19:56:15.096 INFO [stderr] 44 |     sock.send_to(&msg, addr);
Dec 17 19:56:15.096 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 19:56:15.096 INFO [stderr]    |
Dec 17 19:56:15.096 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 19:56:15.096 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 19:56:15.096 INFO [stderr] 
Dec 17 19:56:15.112 INFO [stderr] warning: unused variable: `i`
Dec 17 19:56:15.112 INFO [stderr]   --> src/main.rs:38:9
Dec 17 19:56:15.112 INFO [stderr]    |
Dec 17 19:56:15.112 INFO [stderr] 38 |     for i in 0..50 {
Dec 17 19:56:15.112 INFO [stderr]    |         ^ help: consider using `_i` instead
Dec 17 19:56:15.112 INFO [stderr]    |
Dec 17 19:56:15.112 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 17 19:56:15.112 INFO [stderr] 
Dec 17 19:56:15.112 INFO [stderr] warning: unused variable: `listen_on`
Dec 17 19:56:15.112 INFO [stderr]   --> src/main.rs:37:52
Dec 17 19:56:15.112 INFO [stderr]    |
Dec 17 19:56:15.112 INFO [stderr] 37 | fn listen(server_name: &str, sock: net::UdpSocket, listen_on: net::SocketAddr) {
Dec 17 19:56:15.112 INFO [stderr]    |                                                    ^^^^^^^^^ help: consider using `_listen_on` instead
Dec 17 19:56:15.112 INFO [stderr] 
Dec 17 19:56:15.126 INFO [stderr] warning: variable does not need to be mutable
Dec 17 19:56:15.126 INFO [stderr]  --> src/main.rs:8:9
Dec 17 19:56:15.126 INFO [stderr]   |
Dec 17 19:56:15.126 INFO [stderr] 8 |     let mut socket;
Dec 17 19:56:15.126 INFO [stderr]   |         ----^^^^^^
Dec 17 19:56:15.126 INFO [stderr]   |         |
Dec 17 19:56:15.126 INFO [stderr]   |         help: remove this `mut`
Dec 17 19:56:15.126 INFO [stderr]   |
Dec 17 19:56:15.127 INFO [stderr]   = note: #[warn(unused_mut)] on by default
Dec 17 19:56:15.127 INFO [stderr] 
Dec 17 19:56:15.144 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 19:56:15.144 INFO [stderr]   --> src/main.rs:44:5
Dec 17 19:56:15.144 INFO [stderr]    |
Dec 17 19:56:15.144 INFO [stderr] 44 |     sock.send_to(&msg, addr);
Dec 17 19:56:15.144 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 19:56:15.144 INFO [stderr]    |
Dec 17 19:56:15.144 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 19:56:15.144 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 19:56:15.144 INFO [stderr] 
Dec 17 19:56:15.173 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.69s
Dec 17 19:56:15.802 INFO running `"docker" "inspect" "cc06c8cce7dbf0ccacf89ba70b0be87de2e2f1c64ae2a6e9aa5c22769c97f246"`
Dec 17 19:56:16.146 INFO running `"docker" "rm" "-f" "cc06c8cce7dbf0ccacf89ba70b0be87de2e2f1c64ae2a6e9aa5c22769c97f246"`
Dec 17 19:56:16.442 INFO [stdout] cc06c8cce7dbf0ccacf89ba70b0be87de2e2f1c64ae2a6e9aa5c22769c97f246