Dec 19 09:45:19.749 INFO checking rust-gjk/ChatApp against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 09:45:19.749 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-4/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 09:45:20.117 INFO [stdout] 65fdbe99d222b18aa5dbffb869f345fc9cfd38351ada5edc03e79466b51a362a
Dec 19 09:45:20.119 INFO running `"docker" "start" "-a" "65fdbe99d222b18aa5dbffb869f345fc9cfd38351ada5edc03e79466b51a362a"`
Dec 19 09:45:21.021 INFO [stderr]     Checking serde v1.0.44
Dec 19 09:45:21.021 INFO [stderr]     Checking text_io v0.1.7
Dec 19 09:45:21.022 INFO [stderr]    Compiling syn v0.13.4
Dec 19 09:45:32.234 INFO [stderr]    Compiling serde_derive_internals v0.23.1
Dec 19 09:45:37.482 INFO [stderr]    Compiling serde_derive v1.0.44
Dec 19 09:45:42.388 INFO [stderr]     Checking serde_cbor v0.8.2
Dec 19 09:45:49.188 INFO [stderr]     Checking ChatApp v0.1.0 (/opt/crater/workdir)
Dec 19 09:45:49.804 INFO [stderr] warning: crate `ChatApp` should have a snake case name such as `chat_app`
Dec 19 09:45:49.804 INFO [stderr]   |
Dec 19 09:45:49.804 INFO [stderr]   = note: #[warn(non_snake_case)] on by default
Dec 19 09:45:49.804 INFO [stderr] 
Dec 19 09:45:49.847 INFO [stderr] warning: crate `ChatApp` should have a snake case name such as `chat_app`
Dec 19 09:45:49.847 INFO [stderr]   |
Dec 19 09:45:49.847 INFO [stderr]   = note: #[warn(non_snake_case)] on by default
Dec 19 09:45:49.847 INFO [stderr] 
Dec 19 09:45:50.180 INFO [stderr] warning: variable does not need to be mutable
Dec 19 09:45:50.180 INFO [stderr]  --> src/server.rs:4:9
Dec 19 09:45:50.180 INFO [stderr]   |
Dec 19 09:45:50.181 INFO [stderr] 4 |     let mut socket = UdpSocket::bind("0.0.0.0:12345").unwrap();
Dec 19 09:45:50.181 INFO [stderr]   |         ----^^^^^^
Dec 19 09:45:50.181 INFO [stderr]   |         |
Dec 19 09:45:50.181 INFO [stderr]   |         help: remove this `mut`
Dec 19 09:45:50.181 INFO [stderr]   |
Dec 19 09:45:50.182 INFO [stderr]   = note: #[warn(unused_mut)] on by default
Dec 19 09:45:50.182 INFO [stderr] 
Dec 19 09:45:50.183 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 09:45:50.183 INFO [stderr]   --> src/client.rs:14:5
Dec 19 09:45:50.183 INFO [stderr]    |
Dec 19 09:45:50.183 INFO [stderr] 14 |     recv_socket.send(b"connected");
Dec 19 09:45:50.183 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 09:45:50.184 INFO [stderr]    |
Dec 19 09:45:50.184 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 09:45:50.184 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 09:45:50.184 INFO [stderr] 
Dec 19 09:45:50.185 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 09:45:50.185 INFO [stderr]   --> src/client.rs:19:6
Dec 19 09:45:50.185 INFO [stderr]    |
Dec 19 09:45:50.185 INFO [stderr] 19 |         send_socket.send(zprava.as_bytes());
Dec 19 09:45:50.185 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 09:45:50.185 INFO [stderr]    |
Dec 19 09:45:50.186 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 09:45:50.186 INFO [stderr] 
Dec 19 09:45:50.328 INFO [stderr] warning: variable does not need to be mutable
Dec 19 09:45:50.328 INFO [stderr]  --> src/server.rs:4:9
Dec 19 09:45:50.328 INFO [stderr]   |
Dec 19 09:45:50.328 INFO [stderr] 4 |     let mut socket = UdpSocket::bind("0.0.0.0:12345").unwrap();
Dec 19 09:45:50.328 INFO [stderr]   |         ----^^^^^^
Dec 19 09:45:50.328 INFO [stderr]   |         |
Dec 19 09:45:50.328 INFO [stderr]   |         help: remove this `mut`
Dec 19 09:45:50.328 INFO [stderr]   |
Dec 19 09:45:50.328 INFO [stderr]   = note: #[warn(unused_mut)] on by default
Dec 19 09:45:50.328 INFO [stderr] 
Dec 19 09:45:50.328 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 09:45:50.332 INFO [stderr]   --> src/client.rs:14:5
Dec 19 09:45:50.332 INFO [stderr]    |
Dec 19 09:45:50.332 INFO [stderr] 14 |     recv_socket.send(b"connected");
Dec 19 09:45:50.332 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 09:45:50.332 INFO [stderr]    |
Dec 19 09:45:50.332 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 09:45:50.332 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 09:45:50.332 INFO [stderr] 
Dec 19 09:45:50.332 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 09:45:50.332 INFO [stderr]   --> src/client.rs:19:6
Dec 19 09:45:50.332 INFO [stderr]    |
Dec 19 09:45:50.332 INFO [stderr] 19 |         send_socket.send(zprava.as_bytes());
Dec 19 09:45:50.332 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 09:45:50.332 INFO [stderr]    |
Dec 19 09:45:50.332 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 09:45:50.332 INFO [stderr] 
Dec 19 09:45:50.376 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 29.42s
Dec 19 09:45:51.375 INFO running `"docker" "inspect" "65fdbe99d222b18aa5dbffb869f345fc9cfd38351ada5edc03e79466b51a362a"`
Dec 19 09:45:51.714 INFO running `"docker" "rm" "-f" "65fdbe99d222b18aa5dbffb869f345fc9cfd38351ada5edc03e79466b51a362a"`
Dec 19 09:45:51.984 INFO [stdout] 65fdbe99d222b18aa5dbffb869f345fc9cfd38351ada5edc03e79466b51a362a