Dec 17 16:31:54.625 INFO checking rust-gjk/ChatApp against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 17 16:31:54.625 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/rust-gjk/ChatApp:/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 16:31:55.104 INFO [stdout] d9f77833ae9070939f0554266c46720a43222b1bfa0a7b94b9500d1141339f31
Dec 17 16:31:55.106 INFO running `"docker" "start" "-a" "d9f77833ae9070939f0554266c46720a43222b1bfa0a7b94b9500d1141339f31"`
Dec 17 16:31:56.254 INFO [stderr]     Checking serde v1.0.44
Dec 17 16:31:56.254 INFO [stderr]     Checking text_io v0.1.7
Dec 17 16:31:56.255 INFO [stderr]    Compiling syn v0.13.4
Dec 17 16:32:08.762 INFO [stderr]    Compiling serde_derive_internals v0.23.1
Dec 17 16:32:12.295 INFO [stderr]    Compiling serde_derive v1.0.44
Dec 17 16:32:12.875 INFO [stderr]     Checking serde_cbor v0.8.2
Dec 17 16:32:22.648 INFO [stderr]     Checking ChatApp v0.1.0 (/opt/crater/workdir)
Dec 17 16:32:23.534 INFO [stderr] warning: crate `ChatApp` should have a snake case name such as `chat_app`
Dec 17 16:32:23.534 INFO [stderr]   |
Dec 17 16:32:23.534 INFO [stderr]   = note: #[warn(non_snake_case)] on by default
Dec 17 16:32:23.534 INFO [stderr] 
Dec 17 16:32:23.636 INFO [stderr] warning: crate `ChatApp` should have a snake case name such as `chat_app`
Dec 17 16:32:23.636 INFO [stderr]   |
Dec 17 16:32:23.636 INFO [stderr]   = note: #[warn(non_snake_case)] on by default
Dec 17 16:32:23.636 INFO [stderr] 
Dec 17 16:32:24.196 INFO [stderr] warning: variable does not need to be mutable
Dec 17 16:32:24.196 INFO [stderr]  --> src/server.rs:4:9
Dec 17 16:32:24.196 INFO [stderr]   |
Dec 17 16:32:24.196 INFO [stderr] 4 |     let mut socket = UdpSocket::bind("0.0.0.0:12345").unwrap();
Dec 17 16:32:24.196 INFO [stderr]   |         ----^^^^^^
Dec 17 16:32:24.196 INFO [stderr]   |         |
Dec 17 16:32:24.196 INFO [stderr]   |         help: remove this `mut`
Dec 17 16:32:24.196 INFO [stderr]   |
Dec 17 16:32:24.196 INFO [stderr]   = note: #[warn(unused_mut)] on by default
Dec 17 16:32:24.196 INFO [stderr] 
Dec 17 16:32:24.196 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 16:32:24.196 INFO [stderr]   --> src/client.rs:14:5
Dec 17 16:32:24.196 INFO [stderr]    |
Dec 17 16:32:24.196 INFO [stderr] 14 |     recv_socket.send(b"connected");
Dec 17 16:32:24.196 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 16:32:24.204 INFO [stderr]    |
Dec 17 16:32:24.204 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 16:32:24.204 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 16:32:24.204 INFO [stderr] 
Dec 17 16:32:24.204 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 16:32:24.204 INFO [stderr]   --> src/client.rs:19:6
Dec 17 16:32:24.204 INFO [stderr]    |
Dec 17 16:32:24.204 INFO [stderr] 19 |         send_socket.send(zprava.as_bytes());
Dec 17 16:32:24.204 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 16:32:24.204 INFO [stderr]    |
Dec 17 16:32:24.204 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 16:32:24.204 INFO [stderr] 
Dec 17 16:32:24.356 INFO [stderr] warning: variable does not need to be mutable
Dec 17 16:32:24.356 INFO [stderr]  --> src/server.rs:4:9
Dec 17 16:32:24.356 INFO [stderr]   |
Dec 17 16:32:24.356 INFO [stderr] 4 |     let mut socket = UdpSocket::bind("0.0.0.0:12345").unwrap();
Dec 17 16:32:24.356 INFO [stderr]   |         ----^^^^^^
Dec 17 16:32:24.356 INFO [stderr]   |         |
Dec 17 16:32:24.356 INFO [stderr]   |         help: remove this `mut`
Dec 17 16:32:24.356 INFO [stderr]   |
Dec 17 16:32:24.356 INFO [stderr]   = note: #[warn(unused_mut)] on by default
Dec 17 16:32:24.356 INFO [stderr] 
Dec 17 16:32:24.356 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 16:32:24.356 INFO [stderr]   --> src/client.rs:14:5
Dec 17 16:32:24.356 INFO [stderr]    |
Dec 17 16:32:24.356 INFO [stderr] 14 |     recv_socket.send(b"connected");
Dec 17 16:32:24.357 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 16:32:24.357 INFO [stderr]    |
Dec 17 16:32:24.357 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 16:32:24.357 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 16:32:24.357 INFO [stderr] 
Dec 17 16:32:24.357 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 16:32:24.357 INFO [stderr]   --> src/client.rs:19:6
Dec 17 16:32:24.357 INFO [stderr]    |
Dec 17 16:32:24.357 INFO [stderr] 19 |         send_socket.send(zprava.as_bytes());
Dec 17 16:32:24.357 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 16:32:24.357 INFO [stderr]    |
Dec 17 16:32:24.357 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 16:32:24.357 INFO [stderr] 
Dec 17 16:32:24.396 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 28.23s
Dec 17 16:32:25.046 INFO running `"docker" "inspect" "d9f77833ae9070939f0554266c46720a43222b1bfa0a7b94b9500d1141339f31"`
Dec 17 16:32:25.310 INFO running `"docker" "rm" "-f" "d9f77833ae9070939f0554266c46720a43222b1bfa0a7b94b9500d1141339f31"`
Dec 17 16:32:25.660 INFO [stdout] d9f77833ae9070939f0554266c46720a43222b1bfa0a7b94b9500d1141339f31