Dec 11 13:56:14.837 INFO checking mattyw/rust-udp-play against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 11 13:56:14.837 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-0/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +3a75e80557a103497cffbcab395a2f37061a77ea-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 11 13:56:15.256 INFO [stdout] a4ee0cb00a0d6987a2939a189c2678ddcd51d22f6c7fda0baf1e47b57ec4d187
Dec 11 13:56:15.264 INFO running `"docker" "start" "-a" "a4ee0cb00a0d6987a2939a189c2678ddcd51d22f6c7fda0baf1e47b57ec4d187"`
Dec 11 13:56:17.175 INFO [stderr] usermod: no changes
Dec 11 13:56:17.265 INFO [stderr]     Checking hello v0.1.0 (/source)
Dec 11 13:56:17.864 INFO [stderr] warning: unused imports: `Receiver`, `Sender`
Dec 11 13:56:17.864 INFO [stderr]  --> src/main.rs:3:23
Dec 11 13:56:17.864 INFO [stderr]   |
Dec 11 13:56:17.864 INFO [stderr] 3 | use std::sync::mpsc::{Sender, Receiver};
Dec 11 13:56:17.864 INFO [stderr]   |                       ^^^^^^  ^^^^^^^^
Dec 11 13:56:17.864 INFO [stderr]   |
Dec 11 13:56:17.864 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 11 13:56:17.864 INFO [stderr] 
Dec 11 13:56:17.864 INFO [stderr] warning: unused import: `std::sync::mpsc`
Dec 11 13:56:17.864 INFO [stderr]  --> src/main.rs:4:5
Dec 11 13:56:17.864 INFO [stderr]   |
Dec 11 13:56:17.864 INFO [stderr] 4 | use std::sync::mpsc;
Dec 11 13:56:17.864 INFO [stderr]   |     ^^^^^^^^^^^^^^^
Dec 11 13:56:17.864 INFO [stderr] 
Dec 11 13:56:17.864 INFO [stderr] warning: unused imports: `Receiver`, `Sender`
Dec 11 13:56:17.864 INFO [stderr]  --> src/main.rs:3:23
Dec 11 13:56:17.864 INFO [stderr]   |
Dec 11 13:56:17.864 INFO [stderr] 3 | use std::sync::mpsc::{Sender, Receiver};
Dec 11 13:56:17.864 INFO [stderr]   |                       ^^^^^^  ^^^^^^^^
Dec 11 13:56:17.864 INFO [stderr]   |
Dec 11 13:56:17.864 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 11 13:56:17.864 INFO [stderr] 
Dec 11 13:56:17.864 INFO [stderr] warning: unused import: `std::sync::mpsc`
Dec 11 13:56:17.864 INFO [stderr]  --> src/main.rs:4:5
Dec 11 13:56:17.864 INFO [stderr]   |
Dec 11 13:56:17.865 INFO [stderr] 4 | use std::sync::mpsc;
Dec 11 13:56:17.865 INFO [stderr]   |     ^^^^^^^^^^^^^^^
Dec 11 13:56:17.865 INFO [stderr] 
Dec 11 13:56:17.984 INFO [stderr] warning: unused variable: `i`
Dec 11 13:56:17.984 INFO [stderr]   --> src/main.rs:38:9
Dec 11 13:56:17.984 INFO [stderr]    |
Dec 11 13:56:17.984 INFO [stderr] 38 |     for i in 0..50 {
Dec 11 13:56:17.984 INFO [stderr]    |         ^ help: consider using `_i` instead
Dec 11 13:56:17.984 INFO [stderr]    |
Dec 11 13:56:17.984 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 11 13:56:17.984 INFO [stderr] 
Dec 11 13:56:17.984 INFO [stderr] warning: unused variable: `listen_on`
Dec 11 13:56:17.984 INFO [stderr]   --> src/main.rs:37:52
Dec 11 13:56:17.984 INFO [stderr]    |
Dec 11 13:56:17.984 INFO [stderr] 37 | fn listen(server_name: &str, sock: net::UdpSocket, listen_on: net::SocketAddr) {
Dec 11 13:56:17.984 INFO [stderr]    |                                                    ^^^^^^^^^ help: consider using `_listen_on` instead
Dec 11 13:56:17.984 INFO [stderr] 
Dec 11 13:56:17.989 INFO [stderr] warning: variable does not need to be mutable
Dec 11 13:56:17.989 INFO [stderr]  --> src/main.rs:8:9
Dec 11 13:56:17.989 INFO [stderr]   |
Dec 11 13:56:17.989 INFO [stderr] 8 |     let mut socket;
Dec 11 13:56:17.989 INFO [stderr]   |         ----^^^^^^
Dec 11 13:56:17.989 INFO [stderr]   |         |
Dec 11 13:56:17.989 INFO [stderr]   |         help: remove this `mut`
Dec 11 13:56:17.989 INFO [stderr]   |
Dec 11 13:56:17.989 INFO [stderr]   = note: #[warn(unused_mut)] on by default
Dec 11 13:56:17.989 INFO [stderr] 
Dec 11 13:56:17.989 INFO [stderr] warning: unused variable: `i`
Dec 11 13:56:17.992 INFO [stderr]   --> src/main.rs:38:9
Dec 11 13:56:17.992 INFO [stderr]    |
Dec 11 13:56:17.992 INFO [stderr] 38 |     for i in 0..50 {
Dec 11 13:56:17.992 INFO [stderr]    |         ^ help: consider using `_i` instead
Dec 11 13:56:17.992 INFO [stderr]    |
Dec 11 13:56:17.992 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 11 13:56:17.992 INFO [stderr] 
Dec 11 13:56:17.992 INFO [stderr] warning: unused variable: `listen_on`
Dec 11 13:56:17.992 INFO [stderr]   --> src/main.rs:37:52
Dec 11 13:56:17.992 INFO [stderr]    |
Dec 11 13:56:17.992 INFO [stderr] 37 | fn listen(server_name: &str, sock: net::UdpSocket, listen_on: net::SocketAddr) {
Dec 11 13:56:17.992 INFO [stderr]    |                                                    ^^^^^^^^^ help: consider using `_listen_on` instead
Dec 11 13:56:17.992 INFO [stderr] 
Dec 11 13:56:17.992 INFO [stderr] warning: variable does not need to be mutable
Dec 11 13:56:17.992 INFO [stderr]  --> src/main.rs:8:9
Dec 11 13:56:17.992 INFO [stderr]   |
Dec 11 13:56:17.992 INFO [stderr] 8 |     let mut socket;
Dec 11 13:56:17.992 INFO [stderr]   |         ----^^^^^^
Dec 11 13:56:17.992 INFO [stderr]   |         |
Dec 11 13:56:17.992 INFO [stderr]   |         help: remove this `mut`
Dec 11 13:56:17.992 INFO [stderr]   |
Dec 11 13:56:17.992 INFO [stderr]   = note: #[warn(unused_mut)] on by default
Dec 11 13:56:17.992 INFO [stderr] 
Dec 11 13:56:17.996 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 13:56:17.996 INFO [stderr]   --> src/main.rs:44:5
Dec 11 13:56:17.996 INFO [stderr]    |
Dec 11 13:56:17.996 INFO [stderr] 44 |     sock.send_to(&msg, addr);
Dec 11 13:56:17.996 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 13:56:17.996 INFO [stderr]    |
Dec 11 13:56:17.996 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 11 13:56:17.996 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 13:56:17.996 INFO [stderr] 
Dec 11 13:56:18.020 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 13:56:18.020 INFO [stderr]   --> src/main.rs:44:5
Dec 11 13:56:18.021 INFO [stderr]    |
Dec 11 13:56:18.021 INFO [stderr] 44 |     sock.send_to(&msg, addr);
Dec 11 13:56:18.021 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 13:56:18.021 INFO [stderr]    |
Dec 11 13:56:18.021 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 11 13:56:18.021 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 13:56:18.021 INFO [stderr] 
Dec 11 13:56:18.078 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.87s
Dec 11 13:56:18.097 INFO [stderr] su: No module specific data is present
Dec 11 13:56:19.208 INFO running `"docker" "inspect" "a4ee0cb00a0d6987a2939a189c2678ddcd51d22f6c7fda0baf1e47b57ec4d187"`
Dec 11 13:56:19.534 INFO running `"docker" "rm" "-f" "a4ee0cb00a0d6987a2939a189c2678ddcd51d22f6c7fda0baf1e47b57ec4d187"`
Dec 11 13:56:19.921 INFO [stdout] a4ee0cb00a0d6987a2939a189c2678ddcd51d22f6c7fda0baf1e47b57ec4d187